Device for mortar mix injection in ground

FIELD: building, particularly for reinforcing foundations and cast-in-place piles forming.

SUBSTANCE: device comprises percussion assembly including pneumatic drift and case surrounding thereof, as well as pipeline with pump. Case is rigidly secured to percussion assembly. Case comprises orifice made in front part thereof and adapted for receiving plug. Defined between the plug and the front part is cavity having cross-sectional area equal or more than that of pipeline located between percussion assembly and the case. Case has members for forming holes in ground located along longitudinal case axis and extending in radial direction thereof. The members have low rigidity and may be bent in radial direction. The members are provided with grooves formed in bending line thereof and rest brought into contact with case in extreme position.

EFFECT: increased efficiency.

7 cl, 7 dwg

 

The present invention relates to construction and is intended to strengthen the Foundation for different purposes, the formation of piles by injection into the soil solutions.

At the present time as an injector for injecting the solution into the soil pipe is used, which sinks into the ground by hand or using small tools (see, for example, "foundations, basements and underground structures. Reference designer". Under the General editorship Eaaron, - M,-1985. C. 315-317).

Also known self-propelled devices (punches)used for the formation of piles (see, for example, HBOC, Yebragimov. "The sinking of vertical wells punches." W. Mechanization of construction, 1981, No. 7). However, their use for injection is not achieving the desired effect, for various reasons, the analysis of which is given.

A device for the formation of piles with extended fifth (see ed. mon. The USSR №1270215, CL E 02 D 5/44, E 21 7/28, publ. in BI No. 42, 1986), containing the percussion mechanism and the extender located in the front part. The extender is rigidly attached to the pipe with the elastic strip adjacent to its inner surface, and a flange having at the end of the channels to release the compressed air, while the percussion mechanism is placed in the cavity of the pipe, the sea is about with it and with the possibility of vertical movement. When lifting the unit at a certain height of the molding material is passed through it, the device is removed from the well. The wall of the well above the submerged device is used as a line for supplying molding material, which is loose, and moves downward under the force of gravity.

When injectioni use the solutions supplied under pressure. The walls of the well in this case can not be used because they will erode and crumble, which excludes the possibility of using a given device for injection of solutions, while filtering solution in the soil will occur at a shallow depth, and penetration of the solution over the entire height of the well is necessary to use a sufficiently powerful pumps. Another disadvantage arising from the use of the known device for the formation of piles with extended fifth for injection, is that the extender forms a bore of relatively large diameter, which is filled injectisome solution, which leads to a high consumption of the latter. The result is a pile shaft after hardening of the grout and the surrounding soil, relatively little volume interacts with injectisome solution, i.e. actually formed a pile.

Known is about a device for forming ramming piles in the soil (see RF patent №2153044, class. E 02 D 5/44, publ. in BI No. 20, 2000), containing the working body, placed ahead of cylindrical pipes and drums, the actuator is placed in the upper end of the pipe, hole in your body, connecting the inner and outer surface of the working body, which is covered by the stock. Peripheral part of the working body is attached to the front part of the tube, and the Central - to the shaft and is moveable. The rod is made with a radial protrusions corresponding to the size of the holes of the pipe end, and the rod made movable around its longitudinal axis, the pipe has two stops, and the stem has one of the emphasis placed on the metal pipe that restricts the rotation of the rod relative to the tube.

The disadvantages of these units are: a) inability to conduct injectiona under the Foundation, so as not to bend the device for the formation of a curved borehole and to transmit the blow to the curved rod; b) large energy costs associated with the location of the shock actuator on the surface, resulting in the attenuation of the shock wave while passing through the pipe and to overcome the forces of adhesion along the pipe at ground level.

The task of the proposed technical solution, the efficiency of the device.

This is due to the fact that the device for injection in g the CNT solutions containing shock site - punch, punch, cover, covering the impact site, according to the present invention is supplied by a pipeline from the intake pump placed on the surface, the casing is rigidly attached to the impact site, while at the front of the housing are made of the hole, which with the possibility of axial movement installed the tube, between the tube and the front part of the impact site formed soamsawali with pipeline cavity, the area of which in cross section at least equal to or greater than the cross-sectional area of the pipeline. This embodiment of the design of the device allows injectiona in the soil reinforcing solution while ensuring samotnosc device that, ultimately, will simplify the process of injection and increase productivity by reducing manual labor.

It is advisable on the outer surface of the front casing pin protruding in the radial direction elements for the formation of a cavity in the ground. This structural embodiment of the device increases the efficiency of penetration of the injection solution into the soil.

It is also advisable protruding in the radial direction elements to perform with low stiffness and bending in the radial direction due to the elasticity. This implementation is giving design reduces resistance when drilling of the borehole when removing the device and creates a sufficient cavity (slot), used in the future when the injection of the solution into the soil.

It is advisable protruding in the radial direction of the elements to do with variable stiffness. This embodiment of the device increases its efficiency as acting in the radial direction of the element can be deployed at a greater angle, and therefore, the radial cavity in the ground formed a larger size.

It is advisable protruding in the radial direction elements to perform with the groove at the point of bending. This embodiment design provides a variable stiffness of these elements and bending at the specified location.

It is advisable protruding in the radial direction of the elements attached to the cover hinge. This embodiment of the device provides education cavity fracturing of larger size without reducing durability.

It is advisable protruding in the radial direction to perform focusing in contact with the casing in its extreme position. This embodiment of the device provides reliable installation protruding in the radial direction of the elements when cutting holes in the soil.

On the submitted drawings illustrates: figure 1 - the device in longitudinal section; figure 2 - cross section a-a in figure 1; figure 3 is a view along arrow B of figure 1; figure 4 is a device with regards the now protruding in the radial direction elements; 5 is a view on the arrow on figure 4; 6 - well cross-section with cavities; 7 - the process of injection into the soil solution.

The proposed device for injection of solutions into the soil consists of an impact of node 1, which can be used are well known in the construction of the punch, punch, used for sinking wells for various purposes in the soil. Drums node 1 is rigidly mounted a casing 2, which may be smooth on the outer surface or protruding in the radial direction elements 3. The casing 2 is attached to a shock to node 1 through the sleeve 4 and the liner is welded to the casing 2. Between the impact site 1, the casing 2 and inserts 5 is mounted a pipe 6 with a pump (not shown)placed on the surface. At the front of the casing 2 has an opening 7 in which is placed the tube 8 with the possibility of axial movement. Drums node 1 is fixed in the casing 2 with the formation of the cavity 9, the cross-sectional area which is at least equal to or greater than the bore of the pipeline 6.

Protruding in the radial direction elements 3 attached to the outer surface of the front part of the casing 2 and can be bent at the expense of elasticity (low stiffness). Elements 3 hinged to the casing 2, and for greater flexibility in the location of the bend in each of them is Ipanema groove 10 (Fig 1). Elements 3 have also stops 11, in its extreme position in contact with the casing 2. Positions 12, 13, 14, 15 are marked accordingly bore, the cavity formed by elements 3, the soil and the cavity between the device and the surface injectisome solution. Position 16 shows the nut impact of node 1 to the casing 2, excluding disconnect them when moving the device up.

The principle of operation of the device

Device for injection with surface run into the ground. Under the action of the shock pulse generated by node 1, the device is embedded in the ground. Moving in the soil, it forms the borehole 12, the diameter of which is equal to the diameter of the casing 2. The borehole 12 may have a cross section of a circle or a circle with cavities 13 (6). In the latter case, the cavity 13 are formed by protruding in the radial direction of the elements 3. When sinking wells 12 elements 3 can be drowned (figure 4) relative to the casing 2 and in this case, when moving the device down, well formed round diameter (when removing the device, the elements 3 are opened and formed in the cavity). If the elements 3 are not recessed (1), breaks through the bore 12 with the cavity 13, but the soil has a greater resistance to movement of the device. In the first case, the efforts of the resistance from the soil less, as well 12 is formed without Polo the TEI 13, and the formation of cavities 13 does not waste energy on the formation of the well 12.

When breaking down the well 12 of the tube 8 under the force of resistance on the part of the soil is retained in the hole 7 of the casing 2.

When the device reaches the required depth, due to the reversal of turn, it rises to a certain height. Tube 8 under the action of gravity remains at the bottom of the borehole 12. Then fed via the pipeline 6 injectible solution in the cavity of the bore 12, is placed between the tube 8, which at its bottom, and a device 4. As injectible solution is supplied under pressure, it penetrates into the surrounding soil 14. The cavity 13, as stress concentrators, create a slip plane, which promote deeper penetration injectisome solution into the soil 14, so as to decrease the efforts of the resistance from the ground. In addition, the cavity 13 provide the directional penetration injectisome solution into the surrounding soil 14. This is especially important when hardening, for example, building foundations, when injectible solution should be pumped under the sole Foundation, and not outside it.

The casing 2 of the device with its surface in contact with the ground 14, which determines the occurrence of friction. Causing the device serves as a stopper that prevents the movement injectisome solution up and ensure the maintenance of pressure in it.

The next stage of the device is again raised to a certain height, forming the cavity 15 between the surface injectisome solution and device. Raised injectible solution formed in the cavity 15 and through it into the ground level to find the cavity. Thus, the process of injection of the solution into the soil consistently repeated, discrete lifting device at a certain height and pumping injectible solution layers on the level of finding the newly formed cavity.

The cavity 9 is battery supplied injection solution, smoothing local hydraulic tension. When lifting the tube device 8 remains at the bottom of the hole 12, so the cavity 9 automatically remains between the hole 7 of the casing 2 and the shock node 1.

After discharge injectisome solution in the cavity 15 of the bore 12 include employment in the forward stroke mode. In this case, moving forward, it will impact created them as a shock pulse on injectible solution and thereby its deeper penetration into the soil. After this operation is taking the device up and then served another portion injectisome solution formed in the cavity 15. Further, these operations are repeated.

The application of the proposed device for injector the cation solution into the soil eliminates auxiliary operations in the direction of the pipe when drilling the well at the desired depth, because you can use a hose to a pipe of the desired length. In addition, the process of injective become almost continuous, as there is no need to remove from the well 12 of the device, because you can skip injectisome solution through the device. Another advantage of the proposed device is to increase the efficiency of the discharge injectisome solution in the soil, as well in the upper part always clogged device that eliminates the pressure drop in injectisome solution.

1. Device for injection into the soil solutions containing shock site - air puncher and embracing the casing, characterized in that it is supplied by pipeline from the intake of the pump, the casing is rigidly attached to the impact site, and in its anterior part, made a hole, which has left at the bottom of the well tube, between the tube and the front part of the impact site formed cavity, the area of cross-section equal to or greater than the cross-sectional area of the pipe located between the drum hub and the shroud.

2. The device according to claim 1, characterized in that on the outer surface of the front part of the casing is fixed protruding in the radial direction elements for the formation of a cavity in the ground, when the volume elements are placed along the longitudinal axis of the housing.

3. The device according to claim 2, characterized in that protruding in the radial direction, the elements are made with low stiffness with bending in the radial direction.

4. The device according to claim 3, characterized in that protruding in the radial direction, the elements are made with variable stiffness.

5. Device according to any one of p and 4, characterized in that protruding in the radial direction, the elements are made with a groove at the point of the bend.

6. The device according to claim 2, characterized in that protruding in the radial direction of the elements attached to the cover hinge.

7. The device according to claim 4, characterized in that protruding in the radial direction, the elements are made with an emphasis in contact with the casing at its position.



 

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