Rectangular pipe jacking out-of-hole structure for receiving well

Abstract

The utility model discloses a rectangular pipe-jacking out-hole structure for receiving well, which comprises a high-pressure jet grouting reinforcing area, an underground diaphragm wall and an out-hole guiding embedded steel ring which are sequentially arranged from inside to outside, a tunnel face corresponding to a pipe-jacking cutting area is arranged on the underground diaphragm wall, a crushing hole is drilled on the tunnel face corresponding to a pipe-jacking cutting blind area, and the hole-jacking guiding embedded steel ring is arranged on the tunnel face. And the crushing holes penetrate through the diaphragm wall and extend to the edge of the high-pressure jet grouting reinforcing area. The broken holes are drilled in the cutting blind area, the integrity of the cutting blind area is damaged, the strength of the cutting blind area is reduced, the jacking resistance of the pipe jacking machine is reduced, the jacking speed is increased, the electricity consumption is reduced, construction is convenient, safe and reliable, the problem that normal jacking cannot be achieved due to the fact that the strength of a soil body in a reinforcing area is too high can be effectively solved, and pipe jacking construction is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of jacking pipe hole construction, in particular to a rectangular jacking pipe hole structure for a receiving well. Background Art

[0002] In practical applications, rectangular pipe jacking technology has been successfully applied in many engineering examples. The successful implementation of these projects not only reduced the amount of underground excavation construction work and protected existing structures, but also did not block traffic, effectively alleviating the impact of construction on residents' travel.

[0003] Rectangular pipe jacking construction technology is a trenchless construction technology that uses jacking equipment (such as hydraulic jacks) to push the pipe section from the starting well through the soil layer to the receiving well. During the jacking process, when the pipe jacking machine advances to the receiving reinforcement area, if the reinforced soil is too hard, the pipe jacking machine shell will be stuck on all sides by the reinforced soil because there is a blind spot in the cutter head at the front end of the pipe jacking machine. The jacking resistance is too large, and the cutter head is basically in an idling state, resulting in an extremely slow jacking speed of the pipe jacking machine. At the same time, due to the full power load of the pipe jacking machine, the power consumption increases sharply. Measures such as increasing the jacking force to the maximum, reducing the resistance at the pipe section position, and starting the correction cylinder to jack cannot solve the above problems well. If the reinforced area is directly broken, the risk is relatively high, especially in areas with abundant groundwater. Utility Model Content

[0004] The utility model provides a pipe jacking out-hole structure for a receiving well in order to solve the technical problems existing in the known technology. The structure can ensure that the pipe jacking machine can be smoothly and quickly out of the hole.

[0005] The utility model adopts a technical solution to solve the technical problems existing in the known technology: a rectangular jacking pipe exit structure for a receiving well, comprising a high-pressure rotary grouting reinforcement area, a ground connection wall and a hole guide embedded steel ring arranged in sequence from the inside to the outside, a tunnel face corresponding to the jacking pipe cutting area is arranged on the ground connection wall, and crushing holes are drilled on the tunnel face corresponding to the jacking pipe cutting blind area, and the crushing holes extend through the ground connection wall to the edge of the high-pressure rotary grouting reinforcement area.

[0006] There are two types of cutting blind areas, one is located in front of the corner of the pipe jacking machine head, and the other is located in front of the edge of the pipe jacking machine head. Three crushing holes arranged in a triangle are set in the edge cutting blind area, one of the crushing holes is located in the middle of the edge cutting blind area, and the other two crushing holes are located on the inner side of the hole-exit guide embedded steel ring; two crushing holes are provided in the corner cutting blind area, which are located on the inner side of the corner of the hole-exit guide embedded steel ring.

[0007] The crushing holes are symmetrically and evenly arranged.

[0008] The advantages and positive effects of the utility model are as follows: by drilling broken holes in the cutting blind area, the integrity of the cutting blind area is destroyed and its strength is reduced, so as to reduce the jacking resistance of the pipe jacking machine, increase the jacking speed, reduce electricity consumption, and the construction is convenient, safe and reliable. It can effectively solve the problem that the soil strength in the reinforcement area is too high to be able to be jacked normally, and facilitate the jacking construction of the pipe jacking machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a layout diagram of the crushing holes in the present utility model;

[0010] Figure 2 for Figure 1 AA cross-sectional view.

[0011] In the figure: 1. Broken hole, 2. Pipe jacking machine, 3. Cutting blind area, 4. Pipe jacking machine head, 5. Hole guide steel ring, 6. Pipe jacking machine cutter head, 7. Tunnel face, 8. Ground-connected wall, 9. High-pressure rotary grouting reinforcement area. DETAILED DESCRIPTION

[0012] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings:

[0013] See also Figure 1 and Figure 2 A rectangular jacking pipe exit structure for a receiving well includes a high-pressure rotary grouting reinforcement area 9, a ground-connected wall 8, and a pre-buried steel ring 5 for guiding the exit from the inside to the outside. A tunnel face 7 corresponding to the jacking pipe cutting area is arranged on the ground-connected wall 8. A crushing hole 1 is drilled on the tunnel face 7 corresponding to the blind area of the jacking pipe cutting. The crushing hole 1 passes through the ground-connected wall 8 and extends to the edge of the high-pressure rotary grouting reinforcement area 9.

[0014] The more preferred solution of this embodiment is as follows:

[0015] There are two types of blind areas for pipe jacking cutting, one is located in front of the corner of the pipe jacking head 4, and the other is located in front of the edge of the pipe jacking head 4. Three crushing holes 1 arranged in a triangle are set in the edge cutting blind area, one of the crushing holes 1 is located in the middle of the edge cutting blind area, and the other two crushing holes 1 are located on the inner side of the hole exit guide embedded steel ring 5; two crushing holes 1 are provided in the corner cutting blind area, which are located on the inner side of the corner of the hole exit guide embedded steel ring 5.

[0016] The crushing holes 1 are symmetrically and evenly arranged.

[0017] Application of this utility model:

[0018] When the strength of the high-pressure rotary jet reinforcement area 9 is too high, causing the pipe jacking machine cutter head 6 to idle and the pipe jacking machine 2 to be unable to push forward normally, a tunnel face 7 is set in the receiving well to ensure that the surface meets the drilling conditions. Then, a water drill is used to drill broken holes 1 in the ground-connected wall 8. The broken holes extend all the way to the inner side of the high-pressure rotary jet reinforcement area 9 to reduce the strength of the high-pressure rotary jet reinforcement area 9. When the broken holes 1 reach the set number, push forward is attempted. If push forward is successful, normal construction can be resumed. If push forward is still not possible, the drilling position is continued to increase until normal push forward is possible.

[0019] Although the preferred embodiments of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the above-mentioned specific embodiments. The above-mentioned specific embodiments are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present invention and the claims, which all fall within the scope of protection of the present invention.

Claims

1. A rectangular jacking pipe exit hole structure for a receiving well, comprising a high-pressure jet grouting reinforcement area, a ground-connected wall and an exit hole guide embedded steel ring arranged in sequence from the inside to the outside, characterized in that: A tunnel face corresponding to the pipe jacking cutting area is set on the ground connection wall, and crushing holes are drilled on the tunnel face corresponding to the pipe jacking cutting blind area. The crushing holes pass through the ground connection wall and extend to the edge of the high-pressure rotary grouting reinforcement area.

2. The rectangular jacking pipe exit structure for a receiving well according to claim 1, characterized in that: There are two types of cutting blind areas, one is located in front of the corner of the pipe jacking machine head, and the other is located in front of the edge of the pipe jacking machine head. Three crushing holes arranged in a triangle are set in the edge cutting blind area, one of the crushing holes is located in the middle of the edge cutting blind area, and the other two crushing holes are located on the inner side of the hole-exit guide embedded steel ring; two crushing holes are provided in the corner cutting blind area, which are located on the inner side of the corner of the hole-exit guide embedded steel ring.

3. The rectangular jacking pipe exit structure for a receiving well according to claim 1, characterized in that: The crushing holes are symmetrically and evenly arranged.

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