Method of trenchless installation of bundle of pipes in soil

FIELD: construction.

SUBSTANCE: method includes formation of a pioneer well along the design axis of the installed bundle of pipes between working and receiving pits and simultaneous installation of a drilling bar in it, which is connected to the working organ, subsequent expansion of the pioneer well to the design diameter by soil damage with the help of the working organ, simultaneous transportation of damage products with the help of a cleaning agent into the space between the expanded pioneer well and the bundle of pipes and installation of the bundle of pipes in the expanded pioneer well.

EFFECT: increased reliability of installation of a bundle of pipes without complications related to sags of surface above a well.

3 dwg

 

The technical solution relates to the technology of construction works and can be used for trenchless installation of underground utilities. The proposed method is effective in the construction of dead-end horizontal wells or in crowded urban environments.

A known method of forming wells in the ground when laying underground utilities under the obstacle by the RF patent №2127348, E02F 5/18, publ. in BI No. 7 for 1999, including the sinking of the pioneer wells project axis laid communication between the working and receiving pits, placing pioneer in the bore of the rod, which is connected to the working body, the movement of the working body at the pioneer well the Appendix to the rod axial forces, the expansion of the pioneer wells with a working body to the design diameter of the destruction of the soil, transportation of products of destruction through the working agent who serves in the zone of destruction. When breaking ground for the expansion of pioneer well its pre-ground and sent to grantorino camera working body, and by breaking ground on an additional impact jets working agent, and in grantorino the cell debris mixed with the working medium to form a slurry, and the transportation of products of destruction carried out with what omashu located in grantorino chamber ejector pump located inside the well to the pipeline, and as well it serves a thixotropic solution.

The disadvantage of this technical solution are low productivity and reliability. The performance of the ejector pump is small by definition. Jet working agent entrain a portion of the pulp, in grantorino the camera. The concentration of the solid phase, i.e. soil, slurry pipeline will inevitably be low. It will therefore be low and the throughput of the pipeline. In addition, to transport a certain volume of products of destruction required a large amount of working agent. In places underground often heterogeneous in composition of the soil with inclusions in the form of fragments of stone, brick, gravel, and other construction debris. When getting such a solid insoluble in the working agent inclusions inside grantorino camera is blockage of the ejector pump or slurry pipeline. This causes an emergency stop of a process. If the flow of the working agent in grantorino the camera does not stop, he comes out and washes away the soil, forming a cavity. This leads to failure of the surface above the well. In addition, when laying the tube bundle, the cross-sectional area smaller than the sectional area of the formed wells will be formed voids, materialpolyester can be collapsed soil formed in the well. It can also lead to failure of the surface above the well.

The closest in technical essence and essential features is the way trenchless laying of pipes in the ground in the first embodiment according to the patent of Russian Federation №2344241, E02F 5/18, publ. in BI No. 2 for 2009, which includes education pioneer wells project axis laid communication between the working and receiving pits and simultaneous laying in her drill rod. Rod connected to the working body, then extend the pioneer well to the design diameter of the destruction of the ground by means of the working body and the transport of products of destruction of the flow of treatment agent through the tubing, which is placed in the extended portion of the well, combined with the working body and rotate together with it around the longitudinal axis.

As in similar, if formed in the well to lay the tube bundle, the cross-sectional area smaller than the sectional area of the formed wells will be formed of emptiness that can fill the collapsed soil formed in the well. It can also lead to failure of the surface above the well, therefore, this method is unreliable when laying the tube bundle.

The technical objective of the proposed method is to increase nadinesilke beam pipe due to the exclusion of the failure surface above the well.

The solution to this problem is provided by the fact that in the method of trenchless laying of the beam pipe in the ground, including education pioneer wells project axis of the laying tube bundle between the working and receiving pits and simultaneous laying in her drill rod, which is connected to the working body, the subsequent expansion of the pioneer well to the design diameter of the destruction of the ground by means of the working body, the simultaneous transportation of products of destruction with the help of cleaning agent and the gasket in the extended pioneer borehole tube bundle, according to the technical solution of the transportation of products of destruction of cleaning agent is carried out in the space between the extended pioneer bore and the tube bundle.

Transportation of products of destruction in the space between the extended pioneer bore and the tube bundle will allow you to fill the voids in the well that will prevent collapse of the soil inside the hole, and therefore, would prevent the failures of the surface above the well, which increases the reliability of the laying tube bundle in comparison with the prototype.

The essence of the proposed method of trenchless laying of the beam pipe in the ground is illustrated by the example of its implementation and the drawings figure 1-3. The implementation scheme is shown in figure 1, figure 2 - section a-a in figure 1, figure 3 cross-section B-B in figure 1

Method of trenchless laying of the beam pipe in the ground is implemented as follows. Project axis of the laying tube bundle between work 1 (1) and the receiver 2 pits form the pioneer well 3. Sinking pioneer of the well 3 may be carried out by any known method, for example, by using a punch or installation of horizontal drilling. The diameter formed by the pioneer wells 3 significantly less than the design diameter of the hole formed for trenchless laying of the beam pipe in the ground. Simultaneously with the formation of the pioneer bore 3 therein lay the drill rod 4. After laying pioneer in hole 3 drill stem 4 in the receiving pit 2 to attach it working body 5, the diameter of which is equal to the design diameter of the hole. Inside the working body 5 mounted radially spaced blades 6 (figure 2), which destroy the soil and pulverized debris. Also in the working body 5 is swivel 7, to which is fixed a tube bundle 8. Drilling rod 4 rotates together with the working body 5 and at the same time move onward in the direction opposite the sinking of the pioneer wells 3. While rotating one of the parts of the swivel 7, and the other fixed with the tube bundle 8, moved onward together with the drill rod 4. The rotation and movement of the drilling ø is any 4 can be carried out by the drilling machine 9. When moving the working body 5 to pioneer the well 3 is its extension to the design diameter of the destruction of the ground by means of the working body, the simultaneous transportation of products of destruction with the help of cleaning agent and laying in the extended pioneer the well 3 of the tube bundle 8. Progress of the working body 5 periodically carry out the dismantling of parts of the drill rod 4. The products of destruction received in the cavity 10 of the working body 5. Through the hollow drill rod 4 serves a cleaning agent under pressure Pmfrom the pump or compressor 11, the cleaning agent is led to the blades 6. During the rotation of the working body 5 in the cavity 10 of mixing of particles 12 of decay products 6 blades (figure 2), which are then fed into the space between the borehole wall and the tube bundle 8 under the pressure of the cleaning agent (figure 3)and the cleaning agent flows into the tank 13 mounted in the receiving pit 2. Thus the process of laying tube bundle 8 according to the proposed method. After the release of the working body 5 in the working pit 1 is implemented by its removal.

Method of trenchless laying of the beam pipe in the ground, including education pioneer wells project axis of the laying tube bundle between the working and receiving pits and simultaneous laying in her drilling Stan and, which connect with the working body, the subsequent expansion of the pioneer well to the design diameter of the destruction of the ground by means of the working body, the simultaneous transportation of products of destruction with the help of cleaning agent and the gasket in the extended pioneer borehole tube bundle, characterized in that the transportation of products of destruction of cleaning agent is carried out in the space between the extended pioneer bore and the tube bundle.



 

Same patents:

FIELD: construction.

SUBSTANCE: method includes submersion of a pipe into soil with an open end, formation of a soil core in it and its removal from the pipe with the supplied fluid medium by means of breaking and squeezing out in parts. The fluid medium is supplied into the soil core at the outer side of the submerged pipe, using the channel of connection between the pipeline for supply of the fluid medium and the inner cavity of the submerged pipe.

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5 cl, 3 dwg

FIELD: machine building.

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FIELD: transport.

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5 dwg

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2 cl, 1 dwg

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