Hard rock stratum shield quick receiving transverse moving disintegration construction process

Abstract

The application relates to a hard rock stratum shield quick receiving transverse moving disintegration construction process and relates to the technical field of tunnel construction. The construction process is as follows: S1, surveying the rock stratum, determining a shield machine receiving point and excavating a hole at the shield machine receiving point; S2, reserving a left line hole door and a right line hole door at the hole; S21, pre-burying hole door steel rings in the left line hole door and the right line hole door; S3, laying a bottom plate on the bottom of the hole and installing a receiving base; S4, installing a supporting coaming above the bottom plate, and spacing a plurality of supporting plates above the supporting coaming; S5, hoisting the shield machine after the shield machine exits the hole; S51, when hoisting the shield machine at the left line hole, moving the shield machine from the left line hole to below a hoisting opening, and hoisting the shield machine; S52, hoisting the shield machine at the right line hole; and S6, backfilling the hole. The application has the effects of reducing the construction time of the hole body enclosure structure and the side wall inclined support, facilitating the receiving and exiting of the shield machine, and improving the construction efficiency.

Description

Technical Field

[0001] This application relates to the field of tunnel construction technology, and in particular to a rapid receiving and lateral dismantling construction process for shield tunneling in hard rock strata. Background Technology

[0002] The tunnel boring machine (TBM) method offers high safety and speed during tunnel excavation, and is therefore widely used in urban subways and other municipal and large-scale projects.

[0003] Chinese invention patent application number CN202110807460.5 discloses a method for receiving a tunnel boring machine (TBM), including determining the advancement route, the TBM sequentially breaking through the first side diaphragm wall and the second side diaphragm wall opposite to the existing operating line of the station, and finally reaching the TBM receiving end of the cross-type transfer station; a first reinforcement step, using pipe roof grouting and WSS construction methods to grout and reinforce the construction section from the TBM receiving end of the cross-type transfer station to the second side diaphragm wall of the existing operating line of the station; a first breaking step, breaking through the diaphragm wall at the TBM receiving end of the cross-type transfer station, so that the diaphragm wall at the TBM receiving end of the cross-type transfer station and the second side diaphragm wall are separated. The interlayer soil between the diaphragm walls is exposed; the shield machine receiving box is constructed inside the shield machine receiving end; the tunneling and support are carried out by excavating the interlayer soil between the diaphragm wall at the shield machine receiving end of the cross-transfer station and the second side diaphragm wall of the existing operating line of the station using the CRD method, forming an excavation channel and exposing the second side diaphragm wall; the second reinforcement step involves grouting and reinforcing both sides of the second side diaphragm wall of the existing operating line of the station using the WSS method to form a reinforcement layer; the second demolition step involves demolishing the second side diaphragm wall and reinforcement layer of the existing operating line of the station; the backfilling step involves backfilling and sealing the excavated tunnel; and the receiving step involves the shield machine arriving and completing the receiving process.

[0004] Regarding the aforementioned technologies, the inventors believe that the long time required for excavation and support leads to a long waiting time for the tunnel boring machine to be received, resulting in low construction efficiency. Summary of the Invention

[0005] In order to reduce the construction time of the tunnel retaining structure and side wall bracing, facilitate the shield machine's reception and exit from the tunnel, and improve construction efficiency, this application provides a rapid reception, lateral movement and dismantling construction process for shield tunneling in hard rock strata.

[0006] The technical solution provided in this application for a rapid receiving and lateral dismantling construction process for shield tunneling in hard rock formations is as follows:

[0007] A rapid receiving and lateral dismantling construction process for shield tunneling in hard rock formations is described below:

[0008] S1. Conduct a survey of the rock strata, determine the receiving point of the tunnel boring machine, and excavate the tunnel entrance at the receiving point of the tunnel boring machine.

[0009] S2. Reserve left and right tunnel entrances at the tunnel entrance;

[0010] S21. Steel rings for the tunnel entrances are pre-embedded in both the left and right tunnel entrances;

[0011] S3. Lay the bottom plate at the bottom of the opening and install the receiving base;

[0012] S4. Install a support panel above the base plate, with multiple support plates spaced apart above the support panel;

[0013] S41. The support plate is equipped with a lifting port;

[0014] S5. After the tunnel boring machine exits the tunnel, it will be lifted.

[0015] S51. When lifting the tunnel boring machine (TBM) at the left tunnel entrance, after the TBM exits the tunnel, move the TBM laterally from the left tunnel entrance to below the lifting opening, and then lift the TBM.

[0016] S52, Lifting the tunnel boring machine at the right tunnel entrance;

[0017] S6. Backfill the opening.

[0018] By adopting the above technical solution, and taking advantage of the excellent self-stability of the rock strata, when setting up support plates and support panels inside the tunnel entrance, there is no need to set up retaining structures and end wall supports. At the same time, the receiving base can be used to move the tunnel boring machine from the left tunnel entrance to the right tunnel entrance. This reduces the range of the lifting opening on the support plate, making it easier to receive the tunnel boring machine out of the tunnel, reducing the construction time of the tunnel retaining structure and side wall bracing, while improving the support strength of the support plate, thus improving both safety and construction efficiency.

[0019] Optionally, the receiving base is connected to the upper surface of the base plate. The receiving base includes a transverse track and at least two limiting members. The at least two limiting members are disposed at both ends of the transverse track. The limiting members are slidably connected to the transverse track. The sliding direction of the transverse members is transverse sliding. The transverse members can move laterally from the left line door to the right line door.

[0020] By adopting the above technical solution, the transverse track is used to move the tunnel boring machine to below the lifting port, which facilitates the lifting of the tunnel boring machine after it is disassembled.

[0021] Optionally, at least two of the limiting members are detachably connected to the transverse track, and each limiting member is provided with a transverse drive, which is used to drive the limiting member to slide along the transverse track.

[0022] By adopting the above technical solution, when driving the transverse track, the transverse drive is activated. The transverse drive moves the transverse track to the left or right tunnel entrance to receive the tunnel boring machine. After receiving the tunnel boring machine, the tunnel boring machine is moved to below the lifting port to facilitate its movement.

[0023] Optionally, the support plate is provided with multiple grids.

[0024] By adopting the above technical solution, it is convenient for concrete or backfill material to fall into the opening during backfilling.

[0025] Optionally, the periphery of the support plate is detachably connected to the inner wall of the opening, and the lifting port is located above the right-side opening of the support plate, with the area of ​​the lifting port being less than one-third of the area of ​​the support plate.

[0026] By adopting the above technical solution, the support plate can be detached to facilitate the adjustment of its position. The area of ​​the lifting port is less than one-third of the area of ​​the support plate, which is sufficient to lift the disassembled tunnel boring machine, thereby increasing the support area of ​​the support plate and improving its stability.

[0027] Optionally, the distance between the central axis of the lifting opening and the axis of the left or right portal is 4m-5m.

[0028] By adopting the above technical solution, a safety distance of 4m-5m is reserved, while also facilitating the movement of the tunnel boring machine within a range of 4m-5m.

[0029] Optionally, the port of the lifting opening near the right tunnel opening is smaller than the port of the lifting opening away from the right tunnel opening.

[0030] By adopting the above technical solution, the lifting port is set to be open, which facilitates the lifting of different parts of the dismantled tunnel boring machine.

[0031] Optionally, a mounting plate is provided between the base plate and the receiving base, and the mounting plate is detachably connected to the base plate.

[0032] By adopting the above technical solution, the installation plate is removed when backfilling the opening. At the same time as removing the installation plate, the transverse track and receiving base are also removed, which improves the utilization rate of the transverse track and receiving base and saves energy and is environmentally friendly.

[0033] In summary, this application includes at least one of the following beneficial technical effects:

[0034] 1. By relying on hard rock strata, there is no need for complex support, reducing construction procedures and the construction time of tunnel retaining structure and side wall bracing. At the same time, a receiving base is set up, which moves the receiving base below the lifting port to disassemble and lift the shield machine, thereby facilitating the shield machine to be received and exited the tunnel, and improving construction efficiency.

[0035] 2. The transverse drive facilitates the movement of the limiting components, allowing the tunnel boring machine (TBM) to move together with the limiting components, which facilitates the dismantling and lifting of the TBM. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the receiving base according to an embodiment of this application.

[0037] Figure 2 This is a perspective cross-sectional view of the receiving base according to an embodiment of this application.

[0038] Figure 3 This is a front view of the receiving base according to an embodiment of this application.

[0039] Explanation of reference numerals in the attached drawings: 1. Tunnel entrance; 11. Left tunnel entrance; 12. Right tunnel entrance; 13. Tunnel entrance steel ring; 2. Base plate; 21. Supporting enclosure plate; 22. Support plate; 23. Lifting port; 3. Receiving base; 31. Lateral movement track; 32. Limiting component; 33. Lateral movement drive; 4. Mounting plate; 5. Tunnel boring machine. Detailed Implementation

[0040] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0041] This application discloses a rapid receiving and lateral dismantling construction process for shield tunneling in hard rock formations.

[0042] Reference Figure 1 and Figure 2 A rapid receiving and lateral dismantling construction technology for shield tunneling in hard rock formations is described below:

[0043] S1. Conduct a survey of the rock strata, determine the receiving point of shield machine 5, and excavate the tunnel opening 1 at the receiving point of shield machine 5. After excavating the tunnel opening 1, conduct numerical simulation analysis.

[0044] S2. When the subway line tunnel is excavated, it is basically a double-line excavation. At the tunnel entrance 1, the left line portal 11 and the right line portal 12 are reserved. The axes of the left line portal 11 and the right line portal 12 are located in the same horizontal plane.

[0045] S21. Steel rings 13 are pre-embedded in both the left-line portal 11 and the right-line portal 12.

[0046] S3. Lay a base plate 2 at the bottom of the opening 1 and install a receiving base 3. The base plate 2 can be laid at the bottom of the opening 1 or it can be poured into the bottom of the opening 1 with concrete. In this embodiment, the base plate 2 is laid at the bottom of the opening 1 and the periphery of the base plate 2 can abut against the side wall of the opening 1.

[0047] S4. Install a support plate 21 above the base plate 2. Multiple support plates 22 are spaced above the support plate 21. The support plate 21 supports the support plates 22 on the bottom wall of the opening 1. The height of the support plate 21 is greater than the height of the left line opening 1.

[0048] S41 and support plate 22 are both provided with lifting openings 23, which are located between the left tunnel portal 11 and the right tunnel portal 12;

[0049] S5. After the tunnel boring machine 5 exits the tunnel, the tunnel boring machine 5 will be lifted.

[0050] S51. When lifting the shield machine 5 at the left tunnel opening 1, after the shield machine 5 exits the tunnel, it is moved laterally from the left tunnel opening 1 to below the lifting opening 23, and then the shield machine 5 is lifted.

[0051] S52. Before lifting the shield machine 5 at the right tunnel entrance 1, the shield machine 5 must be disassembled.

[0052] S6. After lifting the shield machine 5 at the left tunnel entrance 1 and the shield machine 5 at the right tunnel entrance 1, backfill the tunnel entrance 1.

[0053] Relying on the hard rock strata, there is no need to construct tunnel retaining structures or sidewall bracing, reducing construction steps and allowing TBM 5 to exit the tunnel ahead of schedule. The left-line shield is received first, then moved horizontally to the right after exiting the tunnel, and then disassembled and hoisted out. The right-line TBM 5 is constructed using conventional shield tunneling methods, reducing the time required for constructing tunnel retaining structures and sidewall bracing, facilitating TBM 5's reception and exit, and improving construction efficiency.

[0054] Reference Figure 2 and Figure 3 The receiving base 3 is connected to the upper surface of the base plate 2. The receiving base 3 includes a transverse track 31 and two limiting members 32. The transverse track 31 is a "T"-shaped track and is fixed to the base plate 2 by bolts. The length direction of the transverse track 31 is the same as the width direction of the opening 1. The two limiting members 32 are slidably connected to both ends of the transverse track 31 by sliders. The limiting member 32 is a triangular frame. The longest hypotenuse of the limiting member 32 abuts against the peripheral wall of the shield machine 5 for placing the shield machine 5. The sliding direction of the transverse member is transverse sliding. The transverse member can move laterally from the left line opening 11 to the right line opening 12. Two limiting members 32 are detachably connected to the transverse track 31. Each limiting member 32 is equipped with a transverse drive 33, which is a jack. The output end of the transverse drive 33 is fixedly connected to the limiting member 32 by bolts, and the other end is also fixedly connected to the base plate 2 by bolts. The transverse drive 33 is used to drive the limiting member 32 to slide along the transverse track 31. The base plate 2 and the receiving base 3 are also fixedly connected by bolts to a mounting plate 4. The mounting plate 4 is a splicing plate. When dismantling the receiving base 3 and the transverse track 31, the mounting plate 4 can be removed, which is convenient and quick.

[0055] As an alternative implementation, the number of limiting members 32 can be two, three or four. In this embodiment, two are used. The two limiting members 32 limit and fix the tunnel boring machine 5 while saving energy and protecting the environment.

[0056] Since subway tunnels are typically excavated with two lines simultaneously, the same tunnel entrance 1 will have a left tunnel portal 11 and a right tunnel portal 12. Traditional support methods require a large lifting space to accommodate the shield machine 5 structure, which can easily lead to safety hazards in the support structure.

[0057] Therefore, refer to Figure 2 and Figure 3 Multiple grids are welded onto the support plate 22, making it sieve-like. The periphery of the support plate 22 is fixedly connected to the inner wall of the tunnel entrance 1 using pre-embedded expansion bolts. The lifting port 23 on the support plate 22 is located above the support plate 22 near the right tunnel entrance 12. The end of the lifting port 23 near the right tunnel entrance 1 is smaller than the end of the lifting port 23 furthest from the right tunnel entrance 1, forming a trapezoidal shape. The area of ​​the lifting port 23 is less than one-third the area of ​​the support plate 22. Simultaneously, the distance between the vertical central axis of the lifting port 23 and the axis of the left tunnel entrance 11 is 5m, and the distance between the vertical central axis of the lifting port 23 and the axis of the right tunnel entrance 12 is also 5m. When lifting the tunnel boring machine 5 at the left tunnel entrance 1, the lateral drive 33 is used to move the limiting member 32, along with the tunnel boring machine 5, 4.5m to the right. Then, the tunnel boring machine 5 is disassembled and lifted.

[0058] The implementation principle of the shield tunneling rapid receiving and lateral dismantling construction process in hard rock strata according to an embodiment of this application is as follows: When lifting the shield machine 5 at the left tunnel entrance 1, the shield machine 5 moves to the limiting component 32, and the lateral drive 33 is activated. The lateral drive 33 moves the shield machine 5 4.5m to the right, so that the shield machine 5 is located below the lifting port 23. Then the shield machine 5 is dismantled and lifted. After that, the shield machine 5 at the right tunnel entrance 1 is also dismantled and lifted. Finally, the tunnel entrance 1 is backfilled. The support plate 22 is set to enhance the stability of the tunnel entrance 1 after backfilling. At the same time, it reduces the construction time of the tunnel retaining structure and side wall diagonal bracing, and further facilitates the shield machine 5 to receive and exit the tunnel, thus improving construction efficiency.

[0059] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A rapid receiving, lateral movement, and dismantling construction process for shield tunneling in hard rock formations, characterized in that, The construction process is as follows: S1. Conduct a survey of the rock strata, determine the receiving point of the tunnel boring machine (5), and excavate the tunnel entrance (1) at the receiving point of the tunnel boring machine (5). S2. Reserve a left-line tunnel entrance (11) and a right-line tunnel entrance (12) at the tunnel entrance (1). S21. Steel rings (13) are pre-embedded in both the left-line portal (11) and the right-line portal (12). S3. Lay the bottom plate (2) at the bottom of the opening (1) and install the receiving base (3); S4. Install a support plate (21) above the base plate (2). Multiple support plates (22) are spaced above the support plate (21). Multiple grids are provided on the support plate (22), making the support plate (22) sieve-like. The periphery of the support plate (22) is detachably connected to the inner wall of the opening (1). S41. The support plate (22) is provided with a lifting port (23), and the area of ​​the lifting port (23) is less than one-third of the area of ​​the support plate (22); S5. After the tunnel boring machine (5) exits the tunnel, the tunnel boring machine (5) will be lifted. S51. When lifting the shield machine (5) at the left tunnel opening (1), after the shield machine (5) exits the tunnel, move the shield machine (5) laterally from the left tunnel opening (1) to below the lifting opening (23), and then lift the shield machine (5). S52, the shield machine (5) lifting the right tunnel opening (1); S6. Backfill the opening (1).

2. The rapid receiving and lateral dismantling construction process for shield tunneling in hard rock formations according to claim 1, characterized in that: The receiving base (3) is connected to the upper surface of the base plate (2). The receiving base (3) includes a transverse track (31) and at least two limiting members (32). The at least two limiting members (32) are disposed at both ends of the transverse track (31). The limiting members (32) are slidably connected to the transverse track (31). The sliding direction of the transverse member is transverse sliding. The transverse member can be moved from the left line door (11) to the right line door (12).

3. The rapid receiving and lateral dismantling construction process for shield tunneling in hard rock formations according to claim 2, characterized in that: At least two of the limiting members (32) are detachably connected to the transverse track (31), and each limiting member (32) is provided with a transverse drive (33), which is used to drive the limiting member (32) to slide along the transverse track (31).

4. The rapid receiving and lateral dismantling construction process for shield tunneling in hard rock formations according to claim 1, characterized in that: The lifting port (23) is located above the support plate (22) near the right-side opening (12).

5. The rapid receiving and lateral dismantling construction process for shield tunneling in hard rock formations according to claim 1 or 4, characterized in that: The distance between the central axis of the lifting port (23) and the axis of the left portal (11) or the axis of the right portal (12) is 4m-5m.

6. The rapid receiving and lateral dismantling construction process for shield tunneling in hard rock formations according to claim 5, characterized in that: The port of the lifting port (23) near the right line opening (1) is smaller than the port of the lifting port (23) originally away from the right line opening (1).

7. The rapid receiving and lateral dismantling construction process for shield tunneling in hard rock strata according to claim 2, characterized in that: An mounting plate (4) is provided between the base plate (2) and the receiving base (3), and the mounting plate (4) is detachably connected to the base plate (2).

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