The method of manufacture of piles with rhizoid elements and device for its implementation

 

(57) Abstract:

The invention relates to the field of construction, namely, the production in the soil ramming piles with root elements. A method of manufacturing a soil ramming piles with rhizoid elements includes sinking into the soil well with further education at an angle to the longitudinal axis of the cavities under the root elements, concreting well educated and cavities. The new method is that rhizoid cavity is formed from the borehole by rotating sealing the soil working body relative to the longitudinal axis of the borehole, and then pulls it to the surface through the well. Device for manufacturing in the soil ramming piles with root-elements contains a pipe inside of a working body in the form of sharpened at the front of the cylinder for forming cavities under root elements ramming piles, the drive of the working body. The working body is placed can be rotated about the longitudinal axis of the pipe and is kinematically connected to the drive movement of the working body. The technical result of the invention consists in the expansion of technological capability, i.e. the capability of manufacturing karnevalsdienstag and is intended for production in the soil of piles with root-elements, which can be used for pile Foundation, strengthening of slopes, etc.

Widely known for ramming piles, is used according to its purpose and to strengthen the Foundation of the erected structures (see, for example, the Instruction device of piles using the punches" WSN-78. - M.: the Ministry of construction of the USSR, 1978). Ramming piles of small diameter when used to increase the carrying capacity of the foundations of the buildings are made inclined. In this case, the pile of work on bending the worst mode of its operation. It should be noted that the used piles with stepped diameter, but their manufacture is complicated, thus reducing their carrying capacity due to the presence of areas with a small diameter.

The closest analogue is the method of manufacture of piles with rhizoid widening (see , for example, T. M. Shmal, C. I. Telichenko, V. I. the Feklin "the Technology of construction of the underground part of buildings and structures".- M.: stroiizdat, 1990, S. 176-177). This pile has an increased carrying capacity by broadening its heel. Bearing capacity of piles depends on the area of its lateral surface, so rhizoid broadening, with greater lateral surface, is more efficient than the broadening of those piles is that it is used only to make piles of relatively larger diameter. The essence of it is that produce first cylindrical vertical hole, then in its bottom immersed 2-5 pile element length 1000-2000 mm Before diving into the well of these elements gather and fasten a wire with a diameter of 8 mm in a single package. The assembled package is lowered by crane into the pipe, then hammers or vibrators through post these elements are immersed in the soil. Because items in a front part made beveled (asymmetric), they diverge from the package in the radial direction and further serve as the roots of the pile. The final operation for the manufacture rhizoid ramming piles is pouring its trunk with simultaneous extraction from the soil of the casing. Known techniques do not allow to make rhizoid pile of small diameter. Problem to be solved in this technical solution is the expansion of technological capability, i.e. the capability of manufacturing rhizoid piles of any diameter, and mostly small, which could not be achieved in the known technical solutions.

This problem is solved due to the fact that are in the ground working body well with polovnih in ground wells and cavities, when this root-elements ramming piles to form, first in the form of cavities in the ground by the rotation of the working body relative to the longitudinal bore, and then pulls it to the surface and fill the formed hole and the cavity of the concrete. These operations make it possible to form a printed pile with rhizoid the broadening of any diameter.

The device for implementing the method of manufacturing a printed piles with root elements in soil containing a pipe inside of a working body in the form of sharpened at the front of the cylinder for forming cavities under root elements ramming piles, the drive movement of the working body, and the body work is posted with the possibility of rotation about the transverse axis of the pipe and kinematically associated with the drive of the moving body. Such embodiment allows the device to produce root-elements ramming piles.

Suitable lower end of the pipe run perpendicular to its longitudinal axis, and the front part of the working body for molding cavity under the root elements to perform asymmetric, with the top feature from the inner surface of the pipe. This embodiment of the device the call is SS="ptx2">

Suitable lower end of the pipe to perform at an angle to its longitudinal axis. This embodiment of the device is an option that allows implementation of the proposed method of manufacturing a printed piles with rhizoid elements when using a commercially available air punch, which is axisymmetric.

It is advisable to drive movement of the working body to place on top of the dip tube and connected with the working body for forming root-elements ramming piles stem and kinematic connection (connection), attached to the stem and the operating authority. Such embodiment of the device provides simultaneous penetration of the working body in the ground and rotate it about the longitudinal axis of the pipe.

It is advisable kinematically link working body for forming cavities under root-elements with the drive movement of the working body to carry out by a hinge, whose longitudinal axis is placed perpendicular to the longitudinal axis of the device. This embodiment provides a more efficient transmission of the shock pulse to the working body when his turn.

It is advisable CIN the prominent elements to perform in the form of a spring, which one end is attached to the rod, and the other to the working body. This structural embodiment of the device provides a reversal of the working body for forming cavities under root-elements relative to the rod and the possibility of extraction of the tool on the surface after his turn relative to the shaft and cavity sinking under the root element.

Suitable kinematic relationship (connection) of the drive rod movement with the working body for forming cavities under root elements ramming piles to perform in the form of a flexible connection, one end of which is attached to the rod, and the other to a tool for forming cavities under root elements ramming piles. This embodiment of the device extracts the working body of the soil surface after molding cavities in the soil under the root elements.

It is advisable to the drive rod of the working body for forming cavities under root elements to perform additional swivel dividing the stem into several sections. Such embodiment of the device increases the bearing capacity (efficiency) ramming piles due to a larger angle rhizoid the ohms for the molding cavities under root elements to perform durotomy in the form of interconnected profile rings, installed one in another with a gap, in vertical section rings are in the shape of the bracket, and a horizontal middle shelf bracket cover horizontal shelf adjacent brackets. This embodiment of the device provides a reversal of the working body relative to the drive shaft of its travel, i.e., provides an implementation of the proposed method of manufacturing printed piles.

Suitable device to perform additional working bodies for forming cavities under root elements ramming piles and United with them drives them move placed offset relative to each other around the circumference of the inside of the pipe. This embodiment of the design of the device enables the production of printed piles of larger diameter.

It is advisable to drive movement of the working body for forming cavities under rhizoid items to place in the lower part of the immersion pipe. Such embodiment of the device increases the efficiency of transmission of the shock pulse on the working body for forming cavities under root-elements that, in turn, increases the efficiency of the manufacturing process ramming piles.

Suitable as the clipping plane at an angle to the longitudinal axis of the device. This embodiment of the device simplifies its design.

It is advisable between the drive rod movement and the working body for forming cavities under root elements ramming piles to install additional elements, the end surfaces of which are spherical, with a through hole, through which is threaded a rope attached to a tool for forming cavities under root elements ramming piles. This embodiment of the device simplifies the extraction of the working body for forming cavities under root elements ramming piles on the surface.

Suitable lower part of the pipe run with a window on one side and the other side to bend towards the window. This embodiment of the device simplifies its manufacture and at the same time increases the efficiency of rotation of the working body for forming cavities under root elements ramming piles due to the coercive forces arising from the effects of the curved part of the pipe.

Suitable lower end of the pipe to perform at an angle to its longitudinal axis. This embodiment of the device simplifies its construction.

It is advisable to the lower end of the tube to attach the curved bracket, the manufacturer.

Suitable bracket to perform cross-sectional T-shape. This embodiment of the device increases the reliability and efficiency, because you can affect the working body for forming cavities under root elements ramming piles when it is turned great effort and not deformed.

The essence of the proposed method and device for the formation of piles with rhizoid elements will illustrate on the example of a specific implementation.

In Fig. 1 shows the operation of the sinking of vertical boreholes used in the future as stem ramming piles; Fig. 2 - operation for installing the pipe in the well; Fig. 3 - section AA of Fig. 2; Fig. 4 is an operation for forming the cavity for the root element ramming piles; Fig. 5 is an operation for forming a cavity under the root element ramming piles in strengthening the Foundation built structures; Fig. 6 - unit articulated connection; Fig. 7 device with a flexible coupling; Fig. 8 - device with a beveled end surface of the pipe; Fig. 9 is a device for forming printed cavity under the root element piles with spring connection of the working body with the drive shaft move; Phi is what the body with the drive shaft of its travel; Fig. 11 is a device for forming cavities under root elements ramming piles with additional hinge connections; Fig. 12 is a device driven by the movement of the working body for forming cavities under root-elements located in the lower part (air puncher); Fig. 13 - device with additional elements with spherical end surfaces and rope, passed through these elements; Fig. 14 - molding cavities under root elements ramming piles of large diameter; Fig. 15 - section b - B of Fig. 14.

For the manufacture of printed piles with root elements must be used in the ground first cavity under the pile shaft, and then the cavity under its root elements (branches). Well under the pile shaft can be held in any way. In the application shown several options: a) separate operations carried well under the trunk and install it pipes (Fig. 1-4); b) combined borehole drilling under the barrel and install it to the pipe with a working body formation in soil cavities under rhizoid cells (Fig. 5-13); C) buried in the soil pipe with an open end, with subsequent purification of the internal cavity from the ground, and then forming poliestere be used under certain conditions of production, in particular, for sinking small wells in the presence of low-power devices to first pass the hole, and then install it to the pipe and molded cavity under root-elements; if there is a powerful impact devices it is possible to combine the borehole drilling with the introduction of the pipe into the soil, the latter being hammered into the ground closed end and, finally, apply the last option - the sinking of piles with trunks of large diameter.

a) preparing ramming piles with root-elements with separate borehole drilling under the pile shaft and install it in her pipe.

Pass in any way, for example, by drilling or puncture hole 2 in 1 soil (Fig. 1). Then she set the tube 3, the end face 4 which may be made oblique (Fig. 8) perpendicular to the axis of the bore end surface 5 (Fig. 5-7) or with window 6 and the curved side 7 of the tube 3 (Fig. 4). Then working body 8 is formed into the cavity for root element ramming piles. The next operation to extract the working body 8 of the formed cavity and, when he comes into the pipe 3, last turn around the longitudinal axis and repeat the above operation for forming a cavity under a different rhizoid cell battery (included) is relatively each other in a circle.

b) the Manufacture of printed piles with rhizoid elements of the joint by drilling wells under the pile shaft and installation of the pipe (Fig. 5-13).

In this case, primer 1 is dipped (often score) pipe 3, the front end of which is plugged working body 8 used in the future for making cavities under root elements ramming piles. While working body 8 can be installed in the pipe 3 with a gap (Fig. 5-8) or with a focus in the end surface of the immersed pipe 3 (Fig. 9-11). In any case, the soil inside the immersion tube 3 is not received. This design is used for the formation of piles with rhizoid elements of relatively small diameter, the pipe 3 with a working body 8 is dipped into the soil 1 to a depth corresponding to the length of the pile shaft, followed by the excavation of cavities under root-elements due to the introduction of the working body 8 into the soil 1, with the tube 3 remains stationary. Due to the beveled front surface 9 of the working body 8 occurs, the horizontal force F, turning it relative to the longitudinal axis of the pipe 3. Kinematic relationship (connection) of the working body 8 to form rhizoid elements ramming piles driven move RA the ptx2">

For the formation of multiple root elements with sinking ramming piles of small diameter working body 8 periodically turn at some angle relative to the longitudinal axis of the pile and repeat the operation for forming cavities under the root element. The final operation is the extraction from soil 1 pipe 3 with a working body 8 and the filling of the formed cavity with concrete.

C) Making printed cavity piles large diameter root-elements (Fig. 14, 15).

In this case, plunge into the ground (usually score) pipe 3 with an open front end. Primer 1 is fed into the pipe 3, which formed the core by any method extracted from the pipe 3 on the day surface. Then inside the pipe 3 establish a working body 8 (or several of them placed around the circumference near the pipe walls 3). The next step are inclined cavity under root elements. These cavities can be one working body 8, turning it in a circle, or use several of them.

The final operations are removing the working body 8, the pipe 3 from the ground 1 and filling the formed cavities with concrete.

Device for the manufacture of printed piles in the form of a pointed symmetric (Fig. 4) or asymmetric (Fig. 5, 7) of the tip with the surface 9, which has a cylindrical shape. In the manufacture of the working body 8 symmetric (Fig. 4) the end of the pipe 3 are not perpendicular to its longitudinal axis. In the manufacture of the working body 8 asymmetric (Fig. 5-9) it reaches, for example, due to bevel the front of the clipping surface 9 in such a way that the top of the working body 8 is placed at the inner surface of the pipe 3, i.e., the offset of the vertex of the angle to the axis of longitudinal symmetry is possible, but impractical, since it decreases the strength of F. For the manufacture of piles of small diameter working body 8 can be installed in the front part of the tube 3 with a gap (Fig. 5, 6) or he has an annular groove 10 (Fig. 9-11, 13), which rests against the end of the pipe 3.

The drive movement of the working body, it is advisable to use a percussion device, in particular a pneumatic punch. And you can carry out: a) the drilling of the well under the trunk ramming piles; b) to score the pipe 3 together with the working body 8 to form cavities under root elements ramming piles; driving only cavities under root-elements (this assumes that the pipe 3, especially large diameter, Buena working body for forming cavities under root elements while believing that uses shock actuator - punch, punch, mounted on top of the pipe 3 (Fig. 5-11, 13, 14 not shown) or at the bottom of it from the working body 8 (Fig. 4, 8, 12). In the latter case, it is advisable to use air puncher - drums pneumatic mechanism, widely used for making holes in the ground. In the first case, the shock pulse is transmitted from the shock of the actuator to the operating body 8 via the shaft 11. In the second case, air puncher 20 itself is a shock actuator.

Shock actuator transmits a pulse through the rod 11 on the working body 8 to form cavities under root elements ramming piles. The rod 11 is connected with the working body 8 kinematic connection (connection), which may be in the form: articulated 12 connections (Fig. 5, 6); elastic connection cable 13 (Fig. 7, 13); duridanov connection 14 (Fig. 10); spring 15 (Fig. 9). When the rod 11 can be divided into several parts 16-18 (Fig. 11, 13). There are two versions: a) separate parts 16-18 rod 11 are connected by hinges 12 (Fig. 11); b) separate parts 16-18 rod 11 is made with holes 19 and mating with each other, the end surfaces of these parts are spherical, with all parts 16-18 rod 11 walania cavities under root elements ramming piles is mounted on the front of the punch 20, the compressed air which is supplied through the hose 21. In this case, the rotation of the working body 8 to form cavities under root-elements relative to the longitudinal axis of the pipe 3 is carried out jointly shock actuator (pneumotropica) and working body 8. In this case, the working body 8 due to the slant surface 9 causes in the ground force F, unwrapping it relative to the longitudinal axis of the pipe 3. When using the pipe 3 with the window 6 and another curved part of the surface 7 (Fig. 3, 4) reversal of the working body 8 is additionally due to the forces caused by the curved surface of the pipe 3. The curved portion 7 of the tube 3 may be made of the pipe 3, reinforced bracket 22 (Fig. 3).

In the manufacture of large diameter ramming piles with root elements in soil 1 is immersed tube 3, within which can be placed several working bodies 8 (Fig. 14, 15) for forming cavities under rhizoid items around the longitudinal axis of the pipe 3 inside the on its periphery, or use one working body 8 and after forming another cavity under the root element shift working body 8 around the longitudinal axis of the pipe 3 and repeat the operation. Position 23 marked fontavenue elements during separate borehole drilling under the pile shaft and install the pipe with the working body (Fig. 1-4).

This need arises when using pogruzhalsy tubes low power. In this case, pass the hole 2 in the ground 1 any available mechanism, in particular by drilling with removal of drilled soil from the borehole 2. Then she set the tube 2 with a curved front end 7 (Fig. 2). The next operation in the pipe 3 is lowered working body 8 to form a cavity under the root element (Fig. 4), which, approaching the window 6, under the action of the curved pipe 3 is rotated in the direction of the window 6 and further forms a cavity at an angle to the borehole 2. In the performance of curved 7 of the pipe 3 with the bracket 22 (Fig. 3) its strength is sufficient to compensate for transverse loads encountered in the manufacture of a working body 8 of the cavity in the ground at an angle to the pile. After sinking one cavity under root elements ramming piles working body 8 is extracted from the ground 1 in the pipe 3, the latter will then unfold and repeat the above operation for forming a cavity under the root element ramming piles.

After making all cavities in the soil under the root elements of the working body 8 together with the pipe 3 is removed from the borehole 2, all the cavities are filled with concrete and compacted.

what s under the pile shaft and the immersion tube in it.

This option is useful if there is a powerful shock of pogruzhalsy providing driving in ground pipe with a closed end.

The working body 8 to form cavities under root elements ramming piles is mounted in the lower part of the tube 3. If the working body has a size greater than the inner diameter of the tube 3 (Fig. 9-11, 13), it is set at the end of the last. If its size does not exceed the internal diameter of the tube 3, it is installed inside the latter. In the first case, the deepening of the pipe 3 into the ground 1 she pushes the working body 8 in the soil, in the second case, it is necessary simultaneously with the deepening of the pipe 3 to act on the rod 11 to the working body 8 to form cavities under root elements simultaneously moved with the pipe 3 into the ground 1. The depth of the pipe 3 into the ground 1 can be performed by any known method, in particular by driving with the surface (in the drawings, the mechanism for introducing into the soil pipe 3, is not shown, because this operation and the mechanism itself is widely known in the construction). When the operating body 8 to form cavities under root elements ramming piles at the end of the pipe 3 on its surface has a groove 10, in cot working body 8 with a smaller diameter, than the inner diameter of the dip tube 3, it is possible, in principle, two options: a) when working body 8 is held in the front part of the tube 3 and the ground does not enter inside the pipe 3; b) when working body 8 is behind the front end buried in the ground pipe 3. In the latter case, the soil gets inside the submersible pipe 3, and this forms a ground stopper, i.e. only part of the length of the pipe 3 soil gets into its internal cavity. In the future you want the tube to push the power P, passing through the rod 11 shock pulse on the working body 8.

The pipe 3 is dipped in primer 1 on the depth of the shaft ramming piles. Then work the body 8 to form cavities under root elements promote deep when staying pipe 3. If you use air puncher 20 (Fig. 8) as the submersible actuator, the rotation angle of the working body 8, and therefore, the deflection angle of the cavity under the root element ramming piles to be insignificant because of the relatively long body of the punch 20 is a long time to be in the pipe 3 and will provide resistance to the rotation of the working body 8.

In this respect, it is more efficient to use a short working body 8, and the shock pulse is Ah he not shown). After exiting the pipe 3 working body 8 begins to turn under the action of a force F arising from asymmetric resistance from the soil. Due to the beveled front surface 9 of the working body 8, the resistance force acting on the working body 8 becomes asymmetric, while the force F is the deviation of the working body 8 in the direction of the longitudinal axis imbedded in the soil pipe 3. Kinematic relationship (connection) between the rod 11 (drums node consists of actuator and rod), and a working body 8 can deviate last. The greatest resistance from the kinematic relations has durative 14 connection (Fig. 10), and the lowest elastic connection 13 (Fig. 7, 13), the rest are intermediate. After fabrication of the root element remove the working body 8 into the pipe 3, which uses a kinematic connection between the rod 11 shock site, and a working body 8. Then turn the working body 8 around the longitudinal axis of the pipe 3 and repeat the operation on the sinking of the next cavity under the root element ramming piles.

After forming the cavities in the soil under the root elements ramming piles first remove the working body 8 for forming pipe 3, and then, is the quiet filled with concrete and compacted. When removing the working body 8 from the cavity in the case of the punch 20 is used, the reverse is widely described in the literature, so it does not show how it works. In other cases, a kinematic relationship (connection) of the rod 11 with a working body 8. When the application of force f directed away from the bottom, the rod 11 is pulled out of the pipe 3 and through the kinematic connection (spring 15 (Fig. 9), durative connection 14 (Fig. 10), a flexible connection 13 (Fig. 7, 13), the working party 8).

In the further bore and the cavity filled with concrete and formed the trunk ramming piles with root elements.

3. Making printed piles large diameter root-elements

In this case, the ground dipped pipe 3 with an open end (Fig. 14, 15) and carry out the cleaning of the interior of the cavity from the soil core. After cleaning the pipe 3 into it omit one or more of the working bodies 8 for forming cavities under root elements ramming piles, and in the latter case, they are placed around the longitudinal axis of the pipe 3. Then, acting on the rod 11 specific working body 8 to form a cavity under the root simeuleu from the ground on the beveled surface 9 of the working body 8, last, deviating from the longitudinal axis of the pipe 3, is uniform in soil 1 cavity, which is filled with concrete, which, ultimately, will be the root element ramming piles.

Then form the following cavity under the root element or by expanding the working body 8 to form a cavity under the root element ramming piles around the longitudinal axis of the pipe 3 (if you use one working body), or use the adjacent working body (if there is a pipe 3) continue the process of molding cavities for further education in them rhizoid elements ramming piles.

After the sinking of the cavities under the root elements of the working bodies 8 and the pipe 3 is extracted from the ground. In the case of sustainable soil simultaneous extraction of the working body 8 and the pipe 3 from the ground, and then filled with concrete formed cavity. In case of unstable soil extraction pipe 3 and the working body 8 is performed with simultaneous filling of the formed cavity with concrete.

It is advisable to use the proposed method and device for forming printed pile with a root element in the strengthening of the bases 23 (Fig. 5) built structures. For this anaysis working body 8, as explained above. As a result, the concrete directly under the Foundation, which significantly increases the bearing capacity of the latter, because it relies directly on the sealed and hardened base or printed pile with rhizoid widening.

In this case, actually used root elements for strengthening of Foundation 23. The barrel 2 ramming piles side of its surface is pressed against the base 23 is erected buildings, compresses it, and thereby strengthens the Foundation 23 due to the lateral force of friction.

If you need to increase the deflection angle of the cavity under the root element ramming piles, it is advisable to use the rod 11, containing more than one hinge (16-19) connection (in this case, it is divided into several sections (Fig. 11, 13)). In this case, the rod 11 has a lower stiffness and the force F working body 8 to form cavities under root elements ramming piles will be deflected at a greater angle.

The application of the proposed method of manufacturing a printed piles with root-elements allows us to produce printed a pile of small diameter with rhizoid elements that has until now been impossible to carry out. Printed Renta for forming cavities under root-elements (known technical solutions use lose items broadening). Filling cavities under root-elements and shaft ramming piles concrete provides greater durability, especially at the interface, which increases the efficiency and carrying capacity ramming piles in General.

1. A method of manufacturing a soil ramming piles with rhizoid elements, including penetration into the soil well with further education at an angle to the longitudinal axis of the cavities under the root elements, concreting well educated and cavities, characterized in that the root cavity is formed from the borehole by rotating sealing the soil working body relative to the longitudinal axis of the borehole, and then pulls it to the surface through the well.

2. Device for manufacturing in the soil ramming piles with root-elements containing a pipe inside of a working body in the form of sharpened at the front of the cylinder for forming cavities under root elements ramming piles, the drive of the working body, characterized in that the working body is placed can be rotated about the longitudinal axis of the pipe and is kinematically connected to the drive movement of the working body.

3. The device according to p. 2, characterized in that the lower end face t of the ar root elements is asymmetric, and its top is located at the inner surface of the pipe.

4. The device according to p. 2, characterized in that the bottom end of the tube is at an angle to its longitudinal axis.

5. The device according to p. 2, characterized in that the drive movement of the working body for forming cavities under root-elements are located in the upper part of the dip tube and is connected to a working body for forming root-elements ramming piles stem and kinematic connection (connection), attached to the stem and the operating authority.

6. The device according to p. 3, characterized in that the kinematic relationship (connection) of the working body for forming cavities under the root elements that drive its movement is produced by a hinge, wherein the longitudinal axis of the placed perpendicular to the longitudinal axis of the device.

7. The device according to p. 2, characterized in that the kinematic connection of the drive rod movement with the working body for forming cavities under root elements made in the form of a spring, one end of which is attached to a tool for forming root-elements ramming piles, and the other to the drive shaft.

8. The device according to p. 2, characterized in that the prominent elements in the form of a flexible connection, one end is attached to the rod, and the other to a tool for forming cavities under root elements ramming piles.

9. The device under item 3 or 4, characterized in that the drive shaft of the working body for forming cavities under the root elements are made with extra hinges dividing the stem into several sections.

10. The device according to p. 2, characterized in that the kinematic connection between the drive movement and a working body for forming cavities under the root elements are made durotomy in the form of interconnected core rings mounted one in the other with a gap, in vertical section rings are in the shape of the bracket and the horizontal middle shelf bracket cover horizontal shelf adjacent brackets.

11. The device according to p. 2, characterized in that it is made with additional working bodies for forming cavities under root elements piles and United with him drives movement of the working bodies, placed offset relative to each other around the circumference of the inside of the pipe.

12. The device according to p. 2, characterized in that the drive movement of the working body is placed in the lower part of pagrazae who or 3, characterized in that the front part of your body for forming cavities under root elements ramming piles are made in the form of a clipping plane at an angle to the longitudinal axis of the device.

14. The device under item 2 or 3, characterized in that between the drive rod movement and the working body for forming cavities under root elements installed additional elements, the end surfaces of which are spherical, with a through hole, through which is threaded a rope attached to a tool for forming cavities under root-elements and the drive shaft.

15. The device according to p. 2, characterized in that the lower part of the tube is made with a window on one side and the other side is made curved in the side window.

16. The device according to p. 15, characterized in that the bottom end of the tube is at an angle to its longitudinal axis.

17. The device according to p. 15, characterized in that the lower end of the tube is attached a curved bracket, and its curvature is directed into the pipe.

18. The device under item 17, characterized in that the bracket in a transverse cross-sectional T-shape.

 

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