Stop device, upward jacking type shaft excavation equipment and shaft construction method

Abstract

The present invention discloses a stop-retreat device, an upward jacking type shaft excavation equipment and a shaft construction method, wherein the stop-retreat device comprises: a rotating mechanism, which is rotatably arranged relative to a pipe segment; a stop-retreat mechanism, which is installed on the rotating mechanism, and the stop-retreat mechanism comprises at least two movable stop-retreat structures, at least two movable stop-retreat structures are distributed along the circumference of the pipe segment, and at least two movable stop-retreat structures can expand outward or contract inward, and at least two fixed stop-retreat structures are arranged along the circumference of the inner side surface of the pipe segment, and the fixed stop-retreat structure abuts against the movable stop-retreat structure when the pipe segment is retracted. The stop-retreat device of the present invention can realize the stop-retreat position limiting of the pipe segment when the pipe segment retreats; when the pipe segment is pushed upward, the movable stop-retreat structure can be prevented from hindering the upward pushing of the pipe segment, and the displacement of the pipe segment during the upward pushing process can be prevented; before construction, a larger installation space can be provided for the installation of the starting structure, as well as the assembly of the pipe segment, the jacking device and the jacking device.

Description

Technical Field

[0001] The invention relates to the technical field of shaft construction, and in particular to a retreat-stopping device, upward jacking-type shaft excavation equipment and a shaft construction method. Background Art

[0002] With the continuous advancement of urban modernization, there is an urgent need for the construction of underground tunnel inspection shafts, ventilation shafts, feeding shafts and other shafts that are urgently needed for urban development, as well as the upgrading of urban sewage and flood control, sponge cities and integrated pipe corridors. However, the traditional development and construction of shafts in urban underground spaces mostly uses temporary enclosures on the ground to dig downward for construction, which not only hinders traffic and affects citizens' travel, but also destroys the urban landscape and affects the green ecology. In response to such problems, the current method of upward jacking shaft construction solves some of the inconveniences caused by the traditional method of digging out shafts from the ground.

[0003] However, in the project of constructing a vertical shaft in an existing tunnel by the upward jacking method, the lining pipe segment needs to be lifted upward by jacks during the construction process. However, when assembling the new pipe segment, due to the retraction of the jack, the lifted pipe segment will have a downward trend under the pressure of the overlying soil and its own weight, thereby causing damage to the water stop strip between the lining pipe segment and the main tunnel. In severe cases, water gushing and sand leakage may even occur. Summary of the invention

[0004] The purpose of the present invention is to provide a retreat-stopping device, an upward jacking type shaft excavation equipment and a shaft construction method, so as to solve the technical problem that in the current project of constructing a shaft in an existing tunnel by the upward jacking method, the jacked pipe segment retreats, causing damage to the water stop strip between the lining pipe segment and the main tunnel, and even causing water gushing and sand leakage in severe cases.

[0005] The above-mentioned purpose of the present invention can be achieved by adopting the following technical solutions:

[0006] The present invention provides a retreat-stopping device, comprising: a rotating mechanism, which is rotatably arranged relative to a pipe joint; a retreat-stopping mechanism, which is installed on the rotating mechanism, and the retreat-stopping mechanism comprises at least two movable retreat-stopping structures, at least two of the movable retreat-stopping structures are distributed at intervals along the circumference of the pipe joint, and at least two of the movable retreat-stopping structures can expand outward or contract inward, and at least two fixed retreat-stopping structures are arranged at intervals along the circumference of the inner side surface of the pipe joint, and the fixed retreat-stopping structure abuts against the movable retreat-stopping structure when the pipe joint is in a retreated state.

[0007] In an embodiment of the present invention, the movable stop structure is rotatably disposed on the rotating mechanism around a horizontal axis.

[0008] In an embodiment of the present invention, the movable anti-retreat structure is installed on the rotating mechanism through a column, and the movable anti-retreat structure includes a anti-retreat beam and a telescopic driving member, the two ends of the anti-retreat beam are respectively a connecting end and an abutting end, the connecting end is hinged to the column, the fixed anti-retreat structure abuts against the abutting end when the pipe section is retracted, and the two ends of the telescopic driving member are respectively hinged to the column and the anti-retreat beam.

[0009] In an embodiment of the present invention, the fixed stop structure is convexly arranged on the inner side surface of the pipe section, and the abutting end abuts against the fixed stop structure in a horizontal state.

[0010] In an embodiment of the present invention, the fixed stop structure includes a latch, an insertion hole is radially provided on the inner side surface of the pipe section, one end of the latch is inserted into the insertion hole, and the other end of the latch is protruded on the inner side surface of the pipe section.

[0011] In an embodiment of the present invention, the fixed anti-retraction structure comprises a corbel column, and the corbel column and the pipe joint are an integrally formed structure.

[0012] In an embodiment of the present invention, a slot matching the fixed stop structure is provided on the abutting end.

[0013] In an embodiment of the present invention, the end face of the abutting end is provided with an outer guide bevel, and the outer guide bevel gradually tilts inward along a vertical downward direction. The fixed stop structure includes a groove provided on the inner side surface of the pipe section, and the inner guide bevel is provided in the groove, and the inner guide bevel cooperates with the outer guide bevel.

[0014] The present invention also provides an upward jacking type shaft excavation equipment, comprising the above-mentioned anti-retraction device, and the upward jacking type shaft excavation equipment also includes: a supporting device, installed on the tunnel, and the rotating mechanism is installed on the supporting device; a jacking device, whose two ends are respectively connected to the supporting device and the pipe section; and a excavation device, which is supported on the top of the pipe section.

[0015] The present invention also provides an upward jacking type shaft construction method, which adopts the above-mentioned upward jacking type shaft excavation equipment, and the upward jacking type shaft construction method comprises the following steps: the rotating mechanism drives the stop mechanism to rotate, so that the movable stop structure is staggered with the fixed stop structure; the jacking device drives the pipe section to jack upward, so that the excavation device excavates upward a predetermined stroke; the rotating mechanism drives the stop mechanism to rotate, so that the movable stop structure is opposite to the fixed stop structure; the jacking device retracts, and the pipe section is stopped and limited by the stop mechanism; a new pipe section is assembled below the bottommost pipe section; and the above steps are repeated until the assembly of the last pipe section is completed.

[0016] In an embodiment of the present invention, the following steps are also included before construction: installing the supporting device on the tunnel, and installing the anti-retreat device on the supporting device, and retracting at least two of the movable anti-retreat structures inward; installing a starting structure at the starting mouth of the shaft above the anti-retreat device; and assembling the jacking device, the pipe section and the excavation device on the supporting device.

[0017] The characteristics and advantages of the present invention are:

[0018] The anti-retreat device of the present invention drives the anti-retreat mechanism to rotate through the rotating mechanism when the pipe segment retreats, and expands the movable anti-retreat structure outward so that the movable anti-retreat structure corresponds to the fixed anti-retreat structure on the inner side surface of the pipe segment, and then makes the fixed anti-retreat structure abut against the movable anti-retreat structure, thereby realizing the anti-retreat position limiting of the pipe segment; when the pipe segment is pushed upward, the anti-retreat mechanism is driven to rotate through the rotating mechanism so that the movable anti-retreat structure and the fixed anti-retreat structure on the inner side surface of the pipe segment are staggered, thereby preventing the movable anti-retreat structure from hindering the upward pushing of the pipe segment, and the movable anti-retreat structure has a radial limiting effect on the pipe segment, which can prevent the pipe segment from shifting during the upward pushing process; before construction, the movable anti-retreat structure is lowered and contracted inwardly, thereby providing a larger installation space for the installation of the starting structure and the assembly of the pipe segment, the pushing device and the tunneling device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a three-dimensional view of the anti-retraction device of this embodiment of the present invention.

[0021] Figure 2 It is a stereoscopic view of the anti-retraction device of this embodiment of the present invention when the pipe segment is in the retracted state.

[0022] Figure 3 It is a stereoscopic view of the anti-retraction device of this embodiment of the present invention when the pipe segment is in the jacking state.

[0023] Figure 4 This is a diagram of the use state of the anti-retraction device of this embodiment of the present invention when it is retracted.

[0024] Figure 5 This is a diagram of the use state of the anti-retraction device of this embodiment of the present invention when it is expanded.

[0025] Figure 6This is a diagram of the use status of the anti-retreat device of this embodiment of the present invention during the subsequent working process.

[0026] Figure 7 Schematic diagram of the structure of the fixed anti-retraction structure of this embodiment of the present invention.

[0027] Figure 8 It is a structural schematic diagram of a fixed anti-retraction structure according to another embodiment of the present invention.

[0028] Fig. 9 The figure is a schematic structural diagram of a retreat-stopping device according to yet another embodiment of the present invention.

[0029] In the figure:

[0030] 1. Retraction mechanism; 11. Movable retraction structure; 111. Retraction beam; 1111. Connecting end; 1112. Abutting end; 1113. Upper surface; 1114. Outer guide slope; 112. Telescopic drive member; 113. Slot; 2. Rotation mechanism; 21. Rotating base; 22. Column; 3. Support device; 4. Jacking device; 5. Excavation device; 6. Pipe section; 61. Pipe segment; 62. Socket; 63. Fixed retraction structure; 631. Pin; 632. Corbel column; 633. Groove; 6331. Inner guide slope; 7. Tunnel; 8. Stratum. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Implementation Method 1

[0033] like Figure 1 , Figure 2 as well as Figure 3 As shown, the present invention provides a retreat-stopping device, comprising: a rotating mechanism 2, rotatably arranged relative to a pipe segment 6; a retreat-stopping mechanism 1, mounted on the rotating mechanism 2, the retreat-stopping mechanism 1 comprising at least two movable retreat-stopping structures 11, the at least two movable retreat-stopping structures 11 are distributed along the circumferential direction of the pipe segment 6 at intervals, and the at least two movable retreat-stopping structures 11 can expand outward or contract inward, at least two fixed retreat-stopping structures 63 are arranged on the inner side surface of the pipe segment 6 at intervals along the circumferential direction thereof, and the fixed retreat-stopping structure 63 abuts against the movable retreat-stopping structure 11 when the pipe segment 6 is in the retreated state.

[0034] The anti-retraction device of the present invention drives the anti-retraction mechanism 1 to rotate through the rotating mechanism 2 when the pipe segment 6 retreats, and expands the movable anti-retraction structure 11 outward, so that the movable anti-retraction structure 11 corresponds to the fixed anti-retraction structure 63 on the inner side of the pipe segment 6, and then the fixed anti-retraction structure 63 abuts against the movable anti-retraction structure 11, thereby realizing the anti-retraction limit of the pipe segment 6; when the pipe segment 6 is pushed upward, the anti-retraction mechanism 1 is driven to rotate by the rotating mechanism 2, so that the movable anti-retraction structure 11 is staggered with the fixed anti-retraction structure 63 on the inner side of the pipe segment 6, thereby preventing the movable anti-retraction structure 11 from hindering the upward pushing of the pipe segment 6, and the movable anti-retraction structure 11 has a radial limiting effect on the pipe segment 6, which can prevent the pipe segment 6 from being offset during the upward pushing process; before construction, the movable anti-retraction structure 11 is lowered and contracted inwardly, thereby providing a larger installation space for the installation of the starting structure and the assembly of the pipe segment 6, the pushing device 4, and the excavation device 5.

[0035] Specifically, Figures 4 to 6 As shown in FIG, the backstop is located below the starting opening of the shaft. Figure 2 and Figure 3 As shown, the pipe segment 6 is formed by a plurality of pipe segments 61 spliced ​​end to end along the circumferential direction. At least two movable stop structures 11 can expand outward until the radial dimension of the stop mechanism 1 is equal to or slightly smaller than the radial dimension of the fixed stop structure 63. The number of movable stop structures 11 can be designed according to the bearing capacity requirements of the vertical load to ensure that it can withstand the load above. In this embodiment, the stop mechanism 1 includes six movable stop structures 11. The pipe segment 6 is formed by three pipe segments 61 spliced ​​end to end along the circumferential direction. Two fixed stop structures 63 are provided on the inner side of each pipe segment 61.

[0036] like Figure 4 , Figure 5 as well as Figure 6As shown, before construction, the support device 3 is installed in the tunnel 7, the stop device is installed on the support device 3 and is located below the starting port of the shaft, the movable stop structure 11 is retracted inwardly to allow a larger space above the support device 3, the starting structure is installed at the starting port of the shaft in the tunnel, and one or more sections of pipe segments 6 assembled and docked along their axial direction are erected around the stop mechanism 1 through the jacking device 4, the excavation device 5 is supported on the topmost pipe segment 6, and then the shaft is started by jacking upward through the jacking device 4. After the start is completed, the movable stop structure 11 is expanded outwardly so that the radial dimension of the stop mechanism 1 is equal to or slightly smaller than the inner diameter of the pipe segment 61, and the stop mechanism 1 is driven to rotate by the rotating mechanism 2 so that the movable stop structure 11 corresponds to the fixed stop structure 63, and then the jacking device 4 is retracted so that the fixed stop structure 63 abuts against the movable stop structure 11, thereby realizing the stop limit of the pipe segment 6. Then, the next pipe section 6 is assembled below the bottommost pipe section 6, and the pipe section 6 is pushed upward by the jacking device 4, and the stop mechanism 1 is driven to rotate by the rotating mechanism 2, so that the movable stop structure 11 is staggered with the fixed stop structure 63, and the above steps are repeated, so that multiple pipe sections 6 are assembled and docked along their axial direction to form a supporting shaft, and the construction of the vertical shaft is completed. It can be seen that during the construction process, at least one pipe section 6 is located in the tunnel 7, that is, the pipe section 6 that has been assembled but not pushed into the stratum 8 above, and the fixed stop structure 63 on at least one pipe section 6 located in the tunnel 7 can achieve the stop limit of all pipe sections 6 above the jacking device 4 by abutting with the movable stop structure 11. The upper load of the jacking device 4 is transmitted to the supporting device 3 below through the stop device, and then transmitted to the tunnel 7 below. In this embodiment, when the jacking device 4 retracts, the movable stop structure 11 abuts against the fixed stop structure 63 in the penultimate pipe section 6. Optionally, when the jacking device 4 retracts, the movable stop-retraction structure 11 abuts against the fixed stop-retraction structure 63 in the bottommost pipe section 6 .

[0037] like Figure 1 As shown, in an embodiment of the present invention, the movable stop structure 11 can be rotatably arranged on the rotating mechanism 2 around a horizontal axis X. The movable stop structure 11 is located below the horizontal axis X, and the movable stop structure 11 rotates upward around the horizontal axis X to expand outward, and the radial size of the stop mechanism 1 increases; the movable stop structure 11 rotates downward around the horizontal axis X to shrink inward, and the radial size of the stop mechanism 1 decreases. Optionally, the movable stop structure 11 is located above the horizontal axis, and the movable stop structure 11 rotates downward around the horizontal axis to expand outward, and the radial size of the stop mechanism 1 increases; the movable stop structure 11 rotates upward around the horizontal axis to shrink inward, and the radial size of the stop mechanism 1 decreases. Optionally, the movable stop structure 11 shrinks by moving inward along the radial direction of the pipe segment 61, and the movable stop structure 11 expands by moving outward along the radial direction of the pipe segment 61.

[0038] like Figure 1 , Figure 2 as well as Figure 3 As shown, the movable stop structure 11 is installed on the rotating mechanism 2 through the column 22. The movable stop structure 11 includes a stop beam 111 and a telescopic drive member 112. The two ends of the stop beam 111 are respectively a connecting end 1111 and an abutting end 1112. The connecting end 1111 is hinged with the column 22. The fixed stop structure 63 abuts against the abutting end 1112 when the pipe section 6 retreats. The two ends of the telescopic drive member 112 are respectively hinged with the column 22 and the stop beam 111. The telescopic drive member 112, the column 22 and the stop beam 111 form a three-link structure. The telescopic drive member 112 is telescopic, thereby driving the stop beam 111 to rotate around a horizontal axis. The telescopic drive member 112 provides a supporting force to the stop beam 111 to ensure that the stop beam 111 supports the upper pipe section 6 firmly. Specifically, the rotating mechanism 2 also includes a rotatable rotating base 21, and the column 22 is fixed on the rotating base 21.

[0039] like Figure 2 , Figure 3 , Figure 7 as well as Figure 8 As shown, in the embodiment of the present invention, the fixed stop structure 63 is convexly arranged on the inner side of the pipe segment 6, and the abutting end 1112 abuts against the fixed stop structure 63 in a horizontal state. Since the fixed stop structure 63 is convexly arranged on the inner side of the pipe segment 6, the fixed stop structure 63 directly abuts against the movable stop structure 11 downward in the retracted state. When the pipe segment 6 needs to be pushed upward, the stop mechanism 1 is driven by the rotating mechanism 2 to rotate a certain angle, so that the fixed stop structure 63 and the movable stop structure 11 can be staggered without shrinking and expanding, thereby avoiding the stop mechanism 1 from shrinking and expanding frequently during the construction process and affecting the construction efficiency. Specifically, when the stop beam 111 rotates upward to a horizontal state, the radial dimension of the stop mechanism 1 is equal to or slightly smaller than the inner diameter of the pipe segment 6. The end face of the abutting end 1112 gradually tilts inward along the vertical downward direction to reduce the friction between the end face of the abutting end 1112 and the inner side of the pipe segment 6, which is conducive to the upward pushing of the pipe segment 6.

[0040] like Figure 7As shown, in this embodiment, the fixed stop structure 63 includes a pin 631, and a plug hole 62 is opened on the inner side surface of the pipe section 6 along its radial direction. One end of the pin 631 is inserted into the plug hole 62, and the other end of the pin 631 is convexly arranged on the inner side surface of the pipe section 6, which is convenient for disassembly and assembly, and can be reused. The pin 631 on the pipe section 6 that has been pushed to the top of the stop device can be removed and then installed on the pipe section 6 to be pushed. Specifically, the pin 631 is fixed in the plug hole 62 by threaded connection, slot clamping or locking and matching of the lock tongue mechanism, ensuring that the pin 631 is reliably connected to the plug hole 62 and can be disassembled.

[0041] like Figure 8 As shown, in another embodiment, the fixed stop structure 63 includes a corbel column 632, and the corbel column 632 is an integrally formed structure with the pipe segment 6. The corbel column 632 is consistent with the structure of the pipe segment 6, thereby improving the durability of the pipe segment 6 and further improving the service life of the supporting shaft. Specifically, the pipe segment 61 and the corbel column 632 are cast by concrete. By arranging reinforcing steel bars inside the corbel column 632, it is ensured that the load bearing capacity of the corbel column 632 meets the requirements.

[0042] like Figure 2 and Figure 3 As shown, in the embodiment of the present invention, a slot 113 matching the fixed stop structure 63 is provided on the abutting end 1112. The fixed stop structure 63 can be stuck in the slot 113, thereby preventing the pipe segment 6 from rotating and falling off from the abutting end 1112 during the retreat process. Specifically, after the assembly of the next pipe segment 6 is completed, the pipe segment 6 is pushed upward by the jacking device 4 until the fixed stop structure 63 is separated from the slot 113, and then the stop mechanism 1 is driven to rotate by the rotating mechanism 2, so that the abutting end 1112 and the fixed stop structure 63 are staggered.

[0043] like Fig. 9 As shown, in another embodiment, the end surface of the abutting end 1112 is provided with an outer guiding slope 1114, and the outer guiding slope 1114 gradually tilts inward along the vertical downward direction, and the fixed stop structure 63 includes a groove 633 provided on the inner side surface of the pipe segment 6, and an inner guiding slope 6331 is provided in the groove 633, and the inner guiding slope 6331 cooperates with the outer guiding slope 1114. When the pipe segment 61 retreats, the stop beam 111 expands outward, so that the abutting end 1112 is inserted into the groove 633 under the guidance of the cooperation of the inner guiding slope 6331 and the outer guiding slope 1114, thereby realizing the stop position of the pipe segment 6.

[0044] Specifically, the groove 633 has an upper groove wall and a lower groove wall, the upper groove wall is horizontally arranged, and the lower groove wall gradually tilts downward from the inside of the groove 633 to the outside of the groove 633 to form an inner guide slope 6331. The abutment end 1112 of the stop beam 111 is bent into a hook shape, and multiple stop beams 111 are generally matched to form a hook claw structure. During the process of the stop beam 111 rotating upward and expanding, the upper surface 1113 of the abutment end 1112 always remains horizontal. When the stop mechanism 1 expands to a radial size equal to the inner diameter of the pipe section 6 and continues to expand, the abutment end 1112 is inserted into the groove 633 under the guidance of the outer guide slope 1114 and the inner guide slope 6331, and the upper groove wall of the groove 633 is in contact with the upper surface 1113 of the abutment end 1112.

[0045] In another embodiment, the fixed anti-retreat structure includes a groove arranged on the inner side surface of the pipe segment. The movable anti-retreat structure is similar to the present embodiment, but a telescopic rod that can be extended and retracted along the radial direction of the pipe segment is provided at the abutting end. The telescopic rod extends radially when the pipe segment is retracted, thereby being inserted into the groove.

[0046] Implementation Method 2

[0047] like Figure 4 , Figure 5 as well as Figure 6 As shown, the present invention also provides an upward jacking type shaft excavation equipment, including the above-mentioned anti-retraction device, and the upward jacking type shaft excavation equipment also includes: a support device 3, installed on the tunnel 7, and a rotating mechanism 2 installed on the support device 3; a jacking device 4, whose two ends are respectively connected to the support device 3 and the pipe segment 6; and a tunneling device 5, which is supported on the top of the pipe segment 6. Its working principle and beneficial effects are the same as those of the first embodiment, and are not repeated here. Specifically, the support device 3 includes a steel structure support frame laid in the tunnel. The jacking device 4 includes a plurality of jacking cylinders installed on the support device 3, and the plurality of jacking cylinders are arranged at intervals along the circumference of the pipe segment 6. Optionally, the upward jacking type shaft excavation equipment also includes a pipe segment assembly device, which is located on one side of the support device 3, and the pipe segment assembly device grabs a plurality of pipe segments 61 one by one onto the jacking device 4 to assemble into a new pipe segment 6.

[0048] Implementation Method 3

[0049] like Figure 4 , Figure 5 as well as Figure 6As shown, the present invention also provides an upward jacking type shaft construction method, using the above-mentioned upward jacking type shaft excavation equipment, the upward jacking type shaft construction method includes the following steps: the rotating mechanism 2 drives the stop mechanism 1 to rotate, so that the movable stop structure 11 is staggered with the fixed stop structure 63; the jacking device 4 drives the pipe segment 6 to jack upward, so that the excavation device 5 excavates upward for a predetermined stroke; the rotating mechanism 2 drives the stop mechanism 1 to rotate, so that the movable stop structure 11 is opposite to the fixed stop structure 63; the jacking device 4 retracts, and the stop mechanism 1 stops the pipe segment 6; a new pipe segment 6 is assembled below the bottommost pipe segment 6; the above steps are repeated until the assembly of the last pipe segment 6 is completed. Its working principle and beneficial effects are the same as those of the first embodiment, and will not be repeated here.

[0050] In the embodiment of the present invention, the following steps are also included before construction: installing the support device 3 on the tunnel 7, and installing the stop device on the support device 3, and retracting at least two movable stop structures 11 inward; installing the starting structure at the starting port of the shaft above the stop device; assembling the jacking device 4, the pipe section 6 and the excavation device 5 on the support device 3. Its working principle and beneficial effects are the same as those of the first embodiment, and will not be repeated here. Specifically, the starting structure includes structures such as the starting steel sleeve.

[0051] The above are only several embodiments of the present invention. Those skilled in the art may make various changes or modifications to the embodiments of the present invention based on the contents disclosed in the application documents without departing from the spirit and scope of the present invention.

Claims

1. A backstop device, characterized in that: include: A rotating mechanism is rotatably arranged relative to the pipe segment; A backstop mechanism is installed on the rotating mechanism, the backstop mechanism includes at least two movable backstop structures, the at least two movable backstop structures are spaced apart along the circumference of the pipe segment, and the at least two movable backstop structures can expand outward or contract inward, and at least two fixed backstop structures are spaced apart along the circumference of the inner side of the pipe segment, and the fixed backstop structure abuts against the movable backstop structure when the pipe segment is in a backed-up state; Among them, the movable anti-retreat structure is installed on the rotating mechanism through a column and can be rotatably arranged around a horizontal axis. The movable anti-retreat structure includes a anti-retreat beam and a telescopic driving member. The two ends of the anti-retreat beam are respectively a connecting end and an abutting end. The connecting end is hinged to the column. The fixed anti-retreat structure abuts against the abutting end when the pipe section is in a retracted state. The two ends of the telescopic driving member are respectively hinged to the column and the anti-retreat beam.

2. The anti-retraction device according to claim 1, characterized in that: The fixed stop structure is convexly arranged on the inner side surface of the pipe section, and the abutting end abuts against the fixed stop structure in a horizontal state.

3. The anti-retraction device according to claim 2, characterized in that: The fixed stop structure comprises a latch, an insertion hole is opened on the inner side surface of the pipe section along its radial direction, one end of the latch is inserted into the insertion hole, and the other end of the latch is protruded on the inner side surface of the pipe section.

4. The anti-retraction device according to claim 2, characterized in that: The fixed anti-retraction structure comprises a corbel column, and the corbel column and the pipe joint are an integrally formed structure.

5. The anti-retraction device according to claim 2, characterized in that: The abutting end is provided with a clamping groove matching the fixed stop structure.

6. The anti-retraction device according to claim 1, characterized in that: The end face of the abutting end is provided with an outer guiding bevel, and the outer guiding bevel gradually tilts inward along the vertical downward direction. The fixed stop structure includes a groove provided on the inner side surface of the pipe section, and the inner guiding bevel is provided in the groove, and the inner guiding bevel cooperates with the outer guiding bevel.

7. An upward jacking type shaft excavation equipment, characterized in that: The upward jacking type shaft excavation equipment comprises the anti-retraction device according to any one of claims 1 to 6, and further comprises: A supporting device is installed on the tunnel, and the rotating mechanism is installed on the supporting device; A jacking device, two ends of which are respectively connected to the supporting device and the pipe section; The excavation device is supported on the top end of the pipe section.

8. An upward jacking shaft construction method, characterized in that: Using the upward jacking type shaft excavation equipment according to claim 7, the upward jacking type shaft construction method comprises the following steps: The rotating mechanism drives the anti-retraction mechanism to rotate, so that the movable anti-retraction structure is staggered with the fixed anti-retraction structure; The jacking device drives the pipe section to jack upward, so that the excavation device excavates upward by a predetermined distance; The rotating mechanism drives the anti-retraction mechanism to rotate, so that the movable anti-retraction structure is opposite to the fixed anti-retraction structure; The jacking device retracts, and the pipe section is stopped and limited by the stop mechanism; Assemble a new pipe section below the bottom pipe section; Repeat the above steps until the assembly of the last pipe section is completed.

9. The upward jacking shaft construction method according to claim 8, characterized in that: The following steps are also included before construction: The supporting device is installed on the tunnel, and the anti-retraction device is installed on the supporting device. retracting at least two of the movable stop structures inwardly; Installing a starting structure at the starting port of the shaft above the retreat-stopping device; The jacking device, the pipe section and the excavation device are assembled on the supporting device.

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