Workover well perimeter containment system

Abstract

The application discloses a working well peripheral support system and belongs to the field of building engineering construction, which comprises a plurality of steel pipe piles surrounding the periphery of a working well, the steel pipe piles are spliced by a plurality of prefabricated pipes, one end of the prefabricated pipe is provided with a first connecting groove, the other end of the prefabricated pipe is provided with a second connecting groove, a connecting assembly is arranged between adjacent prefabricated pipes, the connecting assembly comprises a mounting disc, a connecting column fixedly connected to the mounting disc and used for being screwed with the first connecting groove, a positioning groove is formed in the mounting disc and used for being insertedly matched with adjacent prefabricated pipes, a positioning column is fixedly connected to the inner end face of the positioning groove and used for being insertedly matched with the second connecting groove, a positioning rod is arranged on the mounting disc, the positioning rod penetrates into the prefabricated pipe and is screwed with the prefabricated pipe. The application has the effect of accelerating the engineering progress.

Description

Technical Field

[0001] This application relates to the field of building construction, and in particular to the enclosure system around working wells. Background Technology

[0002] With the continuous development of urban economies, urban above-ground space is constantly decreasing, and the development of urban underground space has gained attention, with more and more underground spaces being utilized. Urban underground space construction generally requires the excavation of working shafts at the construction site as underground passages for engineering construction. For example, in the construction of tunnels or subways in municipal engineering projects, working shafts can be used to lower tunnel boring machines.

[0003] In related technologies, in order to ensure the normal use of the working well, improve the bearing capacity of the soil layer in the construction area, and make underground space construction safer, construction workers will set up a retaining system around the working well. The retaining system is generally made of cast-in-place concrete piles.

[0004] Regarding the aforementioned technologies, the inventors believe that using cast-in-place concrete piles to enclose the area around the working well requires construction workers to wait for the structural strength of the cast-in-place concrete piles to reach the design strength before they can begin construction on the working well, resulting in a slow project progress. Summary of the Invention

[0005] To expedite the project, this application provides a retaining system around the working well.

[0006] The working well perimeter protection system provided in this application adopts the following technical solution:

[0007] The working well perimeter protection system includes multiple steel pipe piles surrounding the working well. Each steel pipe pile is assembled from multiple precast pipes. One end of each precast pipe has a first connecting groove, and the other end has a second connecting groove. A connecting assembly is provided between adjacent precast pipes. The connecting assembly includes a mounting plate and a connecting post fixedly connected to the mounting plate for threaded engagement with the first connecting groove. The mounting plate has a positioning groove for insertion into adjacent precast pipes. A positioning post is fixedly connected to the inner end face of the positioning groove for insertion into the second connecting groove. A positioning rod passes through the mounting plate and is threaded into the precast pipe.

[0008] By adopting the above technical solution and using steel pipe columns instead of concrete cast-in-place piles, it is beneficial to save the time of waiting for the concrete cast-in-place piles to reach the design strength. The operator first drives the first precast pipe into the design position. When the end of the first precast pipe with the first connecting groove is close to the ground, the operator uses the connecting column and the first connecting groove to fix the installation plate above the first precast pipe with thread. Then, the operator uses hoisting equipment to fit the second connecting groove of the second precast pipe onto the positioning column. The positioning rod helps to lock the position of the second precast pipe, thereby connecting the first and second precast pipes. The connection component allows the operator to quickly connect adjacent precast pipes, avoiding conventional welding procedures and further accelerating the construction progress.

[0009] Preferably, a limiting block is provided at the bottom of the connecting column, a limiting strip is slidably inserted in the limiting block, a limiting groove is provided on the inner end face of the first connecting groove for inserting and cooperating with the limiting block, an insertion hole is provided on the inner side wall of the limiting groove for inserting and cooperating with the limiting strip, and a driving component is provided in the connecting column for driving the limiting strip to move.

[0010] By adopting the above technical solution, the operator uses the drive component to move the limit strip, which is then inserted into the socket, thereby strengthening the connection between the connecting column, the limit block, and the precast pipe. The setting of the limit block and the limit groove makes it convenient for the operator to position the installation plate.

[0011] Preferably, the limiting block has a first cavity for accommodating the limiting strip. The driving assembly includes a driving block slidably inserted into the connecting column, a driving rod fixedly connected to the driving block, and a mounting ring sleeved on the driving rod. The end of the driving rod away from the driving block passes into the first cavity. The driving rod is rotatably connected to the inner wall of the first cavity. The mounting ring is disposed in the first cavity and threadedly engaged with the driving rod. A first hinge rod is hinged to the mounting ring. The end of the first hinge rod away from the mounting ring is hinged to the limiting strip.

[0012] By adopting the above technical solution, when the operator rotates the mounting plate, the rotation of the mounting plate drives the connecting column and the drive block to rotate, the rotation of the drive block drives the drive rod to rotate, the rotation of the drive rod causes the mounting ring to move along the length direction of the drive rod, the movement of the mounting ring drives the hinge rod to move, and the movement of the hinge rod causes the limiting strip to be inserted into the insertion hole.

[0013] Preferably, the positioning post has a groove for sliding engagement with the driving block, the groove is connected to the end of the connecting post away from the positioning post, a locking block is fixedly connected to the driving block, a slot is provided on the inner side wall of the groove for sliding engagement with the locking block, a first spring is fixedly connected to the driving block, the end of the first spring away from the driving block is connected to the inner end face of the groove, and the positioning rod passes through the driving block and is threaded into the driving block.

[0014] By adopting the above technical solution, when the mounting plate rotates, the cooperation between the locking block and the locking slot causes the driving block to rotate. The setting of the first spring, on the one hand, makes the driving block move away from the positioning post, thereby making the limiting block move away from the connecting post. On the other hand, the setting of the first spring helps to prevent the driving block from disengaging from the connecting post. When the positioning rod enters the driving block, the positioning rod helps to lock the setting of the driving rod, thereby strengthening the connection strength between adjacent precast pipes.

[0015] Preferably, a limiting post is provided inside the end of the positioning post away from the connecting post, and a first receiving groove is provided on the positioning post for insertion and cooperation with the limiting post. A second spring is fixedly connected to the end of the limiting post located in the first receiving groove. The end of the second spring away from the limiting post is fixedly connected to the inner end face of the first receiving groove, and a second receiving groove is provided on the inner end face of the second connecting groove for insertion and cooperation with the limiting post.

[0016] By adopting the above technical solution, the operator first connects the second connecting groove of the precast pipe with the positioning post, and then the operator fine-tunes the position of the precast pipe so that the first receiving groove connects with the second receiving groove. At this time, the limiting post is inserted into the second receiving groove under the action of the second spring. The setting of the limiting post helps to restrict the relative rotation between the limiting post and the mounting plate, thereby facilitating the installation of the positioning rod.

[0017] Preferably, a baffle plate is provided on the end of the precast pipe that extends out of the ground. A fixing post for interlocking with the limiting groove is slidably provided on the bottom of the baffle plate. A locking pin is provided on the baffle plate. Multiple locking holes for interlocking with the locking pin are provided on the fixing post. A positioning component for fixing the precast pipe is provided inside the fixing post.

[0018] By adopting the above technical solution, the setting of the fixed column makes it convenient for operators to position the enclosure plate. The operators use locking pins to lock the position of the fixed column. Then, the operators use positioning components to strengthen the connection between the precast pipe and the enclosure plate, and directly use the precast pipe to fix the enclosure plate. On the one hand, it facilitates the installation of the enclosure plate and improves the safety around the working well. On the other hand, the connection between the precast pipe and the enclosure plate helps to improve the stability of the enclosure plate.

[0019] Preferably, the fixed column has a second cavity, and the positioning assembly includes a rotating rod passing through the fixed column, a connecting ring fixedly sleeved on the rotating rod in the second cavity, and a plug block slidably passing through the inner wall of the second cavity. One end of the plug block is slidably engaged with the inner wall of the insertion hole, and a second hinge rod is hinged to the other end of the plug block. The second hinge rod is hinged to the outer peripheral surface of the connecting ring, and a rotating assembly for driving the rotating rod to rotate is provided on the enclosure plate.

[0020] By adopting the above technical solution, the operator uses the rotating component to rotate the rotating rod, which in turn drives the connecting ring to rotate. The rotating ring then drives the second hinge rod to move, and the second hinge rod pushes the plug block into the plug hole, thereby preventing the enclosure panel from detaching from the precast pipe.

[0021] Preferably, the rotating assembly includes a connecting sleeve passing through the enclosure plate and a handwheel fixedly connected to the connecting sleeve. The connecting sleeve is rotatably connected to the enclosure plate. The rotating rod passes through the connecting sleeve and a guide block is fixedly connected to the rotating rod. A guide groove for sliding cooperation with the guide block is provided on the inner side wall of the connecting sleeve.

[0022] By adopting the above technical solution, the connecting sleeve is designed to facilitate the sliding of the rotating rod. When the operator turns the handwheel, the handwheel rotates and drives the connecting sleeve to rotate. The rotation of the connecting sleeve drives the rotating rod to rotate through the cooperation of the guide block and the guide groove. The rotation of the rotating rod ultimately allows the plug block to be inserted into the socket.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. Using steel pipe columns instead of concrete cast-in-place piles saves time waiting for the concrete cast-in-place piles to reach their design strength. Operators first drive the first precast pipe into the designed position. When the end of the first precast pipe with the first connecting groove is close to the ground, the operators use the threaded connection between the connecting column and the first connecting groove to fix the mounting plate above the first precast pipe. Next, the operators use hoisting equipment to fit the second connecting groove of the second precast pipe onto the positioning column. The positioning rod helps to lock the position of the second precast pipe, thus connecting the first and second precast pipes. The connecting components allow operators to quickly connect adjacent precast pipes, avoiding conventional welding procedures and further accelerating the construction progress.

[0025] 2. When the mounting plate rotates, the engagement of the locking block and the locking slot causes the driving block to rotate. The first spring, on the one hand, moves the driving block away from the positioning post, thereby moving the limiting block away from the connecting post. On the other hand, the first spring helps to prevent the driving block from detaching from the connecting post. When the positioning rod enters the driving block, the positioning rod helps to lock the driving rod, thereby strengthening the connection between adjacent precast pipes.

[0026] 3. The fixed posts facilitate the positioning of the enclosure panels by the operators. The operators use locking pins to lock the position of the fixed posts. Then, the operators use positioning components to strengthen the connection between the precast pipe and the enclosure panel. The enclosure panels are directly fixed using the precast pipe. On the one hand, this facilitates the installation of the enclosure panels and improves the safety around the working well. On the other hand, the connection between the precast pipe and the enclosure panel helps to improve the stability of the enclosure panels. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the working well perimeter protection system according to an embodiment of this application.

[0028] Figure 2 This is a schematic diagram of the internal structure of the connection component according to an embodiment of this application.

[0029] Figure 3 This is a schematic diagram of the internal structure of the enclosure panel according to an embodiment of this application.

[0030] Figure 4 yes Figure 3 Enlarged diagram of point A in the middle.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Precast pipe; 11. First connecting groove; 12. Second connecting groove; 13. Second receiving groove; 14. Limiting groove; 15. Insertion hole; 2. Enclosure plate; 21. Fixing post; 211. Locking hole; 212. Second cavity; 22. Rectangular groove; 23. Locking pin; 3. Connecting assembly; 31. Mounting plate; 311. Positioning groove; 32. Connecting post; 33. Positioning post; 331. First receiving groove; 332. Sliding groove; 333. Slot; 34. Limiting post; 35. 36. Spring; 36. Limiting block; 361. First cavity; 362. Limiting strip; 37. Positioning rod; 4. Drive assembly; 41. Drive block; 411. Locking block; 42. Drive rod; 43. Mounting ring; 44. First spring; 45. First hinge rod; 5. Positioning assembly; 51. Rotating rod; 511. Guide block; 52. Connecting ring; 53. Insertion block; 54. Second hinge rod; 6. Rotating assembly; 61. Connecting sleeve; 611. Guide groove; 62. Handwheel. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-4This application will be described in further detail.

[0034] This application discloses a retaining system around a working well. (Refer to...) Figure 1 The surrounding enclosure system of the working well includes multiple steel pipe piles and enclosure panels 2 surrounding the working well.

[0035] Reference Figure 1 , Figure 2 The steel pipe piles are arranged vertically and are composed of multiple precast pipes 1 spliced ​​together sequentially. The cross-section of each precast pipe 1 is circular. A connecting assembly 3 is provided between adjacent precast pipes 1. The connecting assembly 3 includes an mounting plate 31 and a connecting column 32. The mounting plate 31 is positioned between adjacent precast pipes 1 and is arranged horizontally. The mounting plate 31 has a circular cross-section. A positioning groove 311 is formed on the upper surface of the mounting plate 31. The opening of the positioning groove 311 is circular, and the outer side wall of the bottom of the precast pipe 1 slides and engages with the inner side wall of the positioning groove 311. A positioning column 33 is fixedly connected in the positioning groove 311. The positioning column 33 is frustum-shaped, and its cross-section gradually increases from top to bottom. A second connecting groove 12 is formed on the bottom surface of the precast pipe 1 for insertion and engagement with the positioning column 33.

[0036] Reference Figure 2 A limiting post 34 is provided through the upper surface of the positioning post 33. The limiting post 34 is vertically arranged and has a rectangular cross-section. A first receiving groove 331 is provided on the positioning post 33, and the positioning post 33 slides in conjunction with the inner wall of the first receiving groove 331. A second spring 35 is provided in the first receiving groove 331. One end of the second spring 35 is fixedly connected to the bottom surface of the positioning post 33, and the other end of the second spring 35 is fixedly connected to the inner bottom surface of the first receiving groove 331. A second receiving groove 13 is provided on the inner end face of the second connecting groove 12 away from the mounting plate 31. The limiting post 34 slides in conjunction with the inner wall of the second receiving groove 13, and the limiting post 34 abuts against the inner top surface of the second receiving groove 13.

[0037] The structure of the positioning post 33 makes it easy for the operator to fit the second connecting groove 12 of the precast tube 1 into the positioning post 33, thereby facilitating the operator to position the precast tube 1. When the bottom surface of the precast tube 1 abuts against the inner bottom surface of the positioning groove 311, and the first receiving groove 331 is aligned with the second receiving groove 13, the limiting post 34 is inserted into the second receiving groove 13 under the action of the second spring 35. One end of the limiting post 34 is located inside the limiting post 34, and the other end of the limiting post 34 is located inside the precast tube 1, thereby preventing the precast tube 1 from rotating relative to the mounting plate 31.

[0038] Reference Figure 2The connecting post 32 is fixedly connected to the bottom surface of the mounting plate 31, and the axis of the connecting post 32 coincides with the axis of the mounting plate 31. A first connecting groove 11 for accommodating the connecting post 32 is provided on the upper surface of the precast pipe 1. The axis of the connecting post 32 coincides with the axis of the precast pipe 1, and the connecting post 32 is threaded into the inner wall of the first connecting groove 11. A limiting block 36 is provided at the bottom of the connecting post 32. The limiting block 36 has a rectangular cross-section, and a limiting groove 14 for insertion into the limiting block 36 is provided on the inner bottom surface of the first connecting groove 11. A first cavity 361 is provided inside the limiting block 36. The first cavity 361 has a rectangular cross-section, and limiting strips 362 pass through the two opposite inner walls of the first cavity 361. An insertion hole 15 for insertion into the limiting strip 362 is provided on the inner wall of the limiting groove 14.

[0039] Reference Figure 2 The limiting block 36 is equipped with a driving assembly 4 for moving the limiting strip 362. The driving assembly 4 includes a driving block 41, a driving rod 42, and a mounting ring 43. The driving block 41 is annular, and a sliding groove 332 is formed in the positioning post 33. The axis of the sliding groove 332 coincides with the axis of the connecting post 32, and the sliding groove 332 is connected to the bottom surface of the connecting post 32. The driving block 41 slides and engages with the inner wall of the sliding groove 332. A locking block 411 is fixedly connected to the outer circumferential surface of the driving block 41. A locking groove 333 is formed along the length direction of the inner wall of the sliding groove 332. The locking block 411 slides and engages with the inner wall of the locking groove 333. A first spring 44 is provided in the sliding groove 332. One end of the first spring 44 is fixedly connected to the upper surface of the driving block 41, and the other end of the first spring 44 is fixedly connected to the inner top surface of the sliding groove 332. The first spring 44 is designed to both push the drive block 41 to move away from the positioning post 33 and prevent the drive block 41 from dislodging from the slide groove 332.

[0040] Reference Figure 2 The drive rod 42 is fixedly connected to the bottom surface of the drive block 41, and the axis of the drive rod 42 coincides with the axis of the drive block 41. The end of the drive rod 42 away from the drive block 41 passes into the first cavity 361 of the limiting block 36, and the drive rod 42 is rotatably connected to the inner bottom surface of the first cavity 361. The mounting ring 43 is located in the first cavity 361 and is sleeved on the end of the drive rod 42 located in the first cavity 361. The mounting ring 43 and the drive rod 42 are threaded together. The mounting ring 43 is provided with two first hinge rods 45, which are symmetrically arranged about the axis of the mounting ring 43. The two first hinge rods 45 correspond one-to-one with the two limiting bars 362. One end of the first hinge rod 45 is hinged to the end of the limiting bar 362 located in the first cavity 361, and the other end of the first hinge rod 45 is hinged to the mounting ring 43.

[0041] Reference Figure 2A positioning rod 37 is provided on the mounting plate 31. The positioning rod 37 passes through the precast tube 1 and the positioning post 33 in sequence and extends into the drive block 41. The positioning rod 37 is threadedly engaged with the mounting plate 31, the precast tube 1 and the drive block 41.

[0042] The operator first uses mechanical equipment to drive the first precast pipe 1 into the designed position. When the end of the first precast pipe 1 with the first connecting groove 11 is close to the ground, the operator inserts the limiting block 36 into the limiting groove 14. Then, the operator rotates the mounting plate 31. The rotation of the mounting plate 31 causes the connecting post 32 to engage with the first connecting groove 11, thereby strengthening the connection between the mounting plate 31 and the precast pipe 1. The rotation of the mounting plate 31 also causes the driving block 41 to rotate through the engagement of the locking block 411 and the locking groove 333. The rotation of the driving block 41 drives the driving rod 42 to rotate, and the rotation of the driving rod 42 causes the mounting ring 43 to move along the length of the driving rod 42. The movement of the mounting ring 43 drives the first hinge rod 45 to move, and the first hinge rod 45 drives the limiting strip 362 to move, finally causing the limiting strip 362 to be inserted into the insertion hole 15. At this time, the first spring 44 is in a compressed state, the drive block 41 is located inside the positioning post 33, and the operator inserts the positioning rod 37. The positioning rod 37 is threadedly engaged with the mounting plate 31, the precast tube 1, the positioning post 33 and the drive block 41 in sequence, thereby strengthening the connection strength between adjacent precast tubes 1.

[0043] Reference Figure 1 , Figure 3 The enclosure panel 2 is rectangular and is positioned at the end of the precast pipe 1 extending above the ground. Two fixed posts 21 are spaced apart on the bottom surface of the enclosure panel 2. Two rectangular slots 22 are formed inside the enclosure panel 2, each corresponding to one of the fixed posts 21. One end of each fixed post 21 slides against the inner wall of a rectangular slot 22, and the other end slides against the inner wall of a limiting slot 14. Locking pins 23 are provided on both sides of the enclosure panel 2, each corresponding to one of the fixed posts 21. Two locking holes 211 are spaced apart on the side of each fixed post 21 near the positioning pin, for insertion into the positioning pin.

[0044] The rectangular groove 22 is designed to facilitate the enclosure 2 to accommodate the fixed post 21, thereby making it easier for operators to transport the enclosure 2. When the fixed post 21 is fully inserted into the rectangular groove 22, the operator inserts the locking pin 23 into the first locking hole 211 of the fixed post 21. The locking pin 23 prevents the end of the fixed post 21 from sliding out of the rectangular groove 22. However, when the fixed post 21 extends into the rectangular groove 22, the operator inserts the locking pin 23 into the second locking hole 211 of the fixed post 21, thereby preventing the fixed post 21 from detaching from the rectangular groove 22.

[0045] Reference Figure 3The fixed column 21 is equipped with a positioning assembly 5 for fixing the precast pipe 1. The positioning assembly 5 includes a rotating rod 51, a connecting ring 52, and a plug-in block 53. A second cavity 212 is formed at the bottom of the fixed column 21, and the cross-section of the second cavity 212 is rectangular. The rotating rod 51 passes through the fixed column 21 and extends into the second cavity 212, and the rotating rod 51 is rotatably connected to the inner end face of the second cavity 212. The connecting ring 52 is located in the second cavity 212 and is fixedly sleeved on the rotating rod 51. Two plug-in blocks 53 are provided, and the two plug-in blocks 53 are symmetrically arranged about the axis of the rotating rod 51. The two plug-in blocks 53 pass through the fixed column 21 and slide in cooperation with the inner sidewall of the insertion hole 15. Two second hinge rods 54 are symmetrically arranged on the connecting ring 52. The two second hinge rods 54 correspond one-to-one with the two plug blocks 53. One end of the second hinge rod 54 is hinged to the end of the plug block 53 located in the second cavity 212, and the other end of the second hinge rod 54 is hinged to the outer circumferential surface of the connecting ring 52.

[0046] Reference Figure 3 , Figure 4 The enclosure 2 is equipped with a rotating assembly 6 for driving the rotating rod 51 to rotate. The rotating assembly 6 includes a connecting sleeve 61 and a handwheel 62. The connecting sleeve 61 passes through the enclosure 2 and is rotatably connected to the enclosure 2. The connecting sleeve 61 is sleeved on the rotating rod 51, and the inner sidewall of the connecting sleeve 61 slides with the rotating rod 51. A guide block 511 is fixedly connected to the rotating rod 51. A guide groove 611 is formed on the inner sidewall of the connecting sleeve 61 along its length, and the guide block 511 slides with the inner sidewall of the guide groove 611. The handwheel 62 is located at the end of the connecting sleeve 61 that extends beyond the top surface of the enclosure 2, and the handwheel 62 is fixedly connected to the connecting sleeve 61.

[0047] The operator turns the handwheel 62, which drives the connecting sleeve 61 to rotate. The rotation of the connecting sleeve 61 drives the rotating rod 51 to rotate through the cooperation of the guide block 511 and the guide groove 611. The rotation of the rotating rod 51 drives the connecting ring 52 to rotate. The rotation of the connecting ring 52 drives the second hinge rod 54 to move. The second hinge rod 54 pushes the insertion block 53 to insert into the insertion hole 15, thereby preventing the enclosure plate 2 from detaching from the precast pipe 1.

[0048] The implementation principle of the working well perimeter retaining system in this application embodiment is as follows: using steel pipe columns instead of concrete cast-in-place piles helps save time waiting for the concrete cast-in-place piles to reach their design strength. The operator first drives the first precast pipe 1 into the designed position. When the end of the first precast pipe 1 with the first connecting groove 11 is close to the ground, the operator uses the connecting column 32 and the threaded engagement of the first connecting groove 11 to fix the mounting plate 31 above the first precast pipe 1. Next, the operator uses hoisting equipment to fit the second connecting groove 12 of the second precast pipe 1 onto the positioning column 33. The positioning rod 37 helps to lock the position of the second precast pipe 1, thereby connecting the first and second precast pipes 1. The connecting component 3 facilitates the operator's quick connection of adjacent precast pipes 1, avoiding conventional welding procedures and further accelerating the construction progress.

[0049] Then, the operator can use the fixing post 21 to position the enclosure panel 2. Next, the operator can use the positioning component 5 to strengthen the connection between the precast pipe 1 and the enclosure panel 2. Fixing the enclosure panel 2 with the precast pipe 1 facilitates the installation of the enclosure panel 2 and improves the safety around the working well. On the other hand, the connection between the precast pipe 1 and the enclosure panel 2 helps to improve the stability of the enclosure panel 2.

[0050] 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 retaining system around a working well, characterized in that: The system includes multiple steel pipe piles surrounding the working well. The steel pipe piles are spliced ​​together from multiple prefabricated pipes (1). One end of each prefabricated pipe (1) has a first connecting groove (11), and the other end of each prefabricated pipe (1) has a second connecting groove (12). A connecting assembly (3) is provided between adjacent prefabricated pipes (1). The connecting assembly (3) includes an installation plate (31) and a connecting post (32) fixedly connected to the installation plate (31) for threaded engagement with the first connecting groove (11). The installation plate (31) has a positioning groove (311) for insertion engagement with adjacent prefabricated pipes (1). A positioning post (33) for insertion engagement with the second connecting groove (12) is fixedly connected to the inner end face of the positioning groove (311). A positioning rod (37) is passed through the installation plate (31) and is threaded into the prefabricated pipe (1). The bottom of the connecting post (32) is provided with a limiting block (36), and a limiting strip (362) is slidably passed through the limiting block (36). The inner end face of the first connecting groove (11) is provided with a limiting groove (14) for inserting and cooperating with the limiting block (36). The inner side wall of the limiting groove (14) is provided with a insertion hole (15) for inserting and cooperating with the limiting strip (362). The connecting post (32) is provided with a driving component (4) for driving the limiting strip (362) to move. The limiting block (36) has a first cavity (361) for accommodating the limiting strip (362). The driving assembly (4) includes a driving block (41) slidably inserted in the connecting column (32), a driving rod (42) fixedly connected to the driving block (41), and a mounting ring (43) sleeved on the driving rod (42). The end of the driving rod (42) away from the driving block (41) is inserted into the first cavity (361). The driving rod (42) is rotatably connected to the inner wall of the first cavity (361). The mounting ring (43) is disposed in the first cavity (361). The mounting ring (43) is threadedly engaged with the driving rod (42). A first hinge rod (45) is hinged on the mounting ring (43). The end of the first hinge rod (45) away from the mounting ring (43) is hinged to the limiting strip (362). The positioning post (33) has a sliding groove (332) for sliding cooperation with the driving block (41). The sliding groove (332) is connected to the end of the connecting post (32) away from the positioning post (33). A locking block (411) is fixedly connected to the driving block (411). A slot (333) for sliding cooperation with the locking block (411) is provided on the inner side wall of the sliding groove (332). A first spring (44) is fixedly connected to the driving block (41). The end of the first spring (44) away from the driving block (41) is connected to the inner end face of the sliding groove (332). The positioning rod (37) passes into the driving block (41) and is threadedly engaged with the driving block (41).

2. The working well perimeter protection system according to claim 1, characterized in that: A limiting post (34) is provided inside the end of the positioning post (33) away from the connecting post (32). A first receiving groove (331) is provided on the positioning post (33) for insertion and cooperation with the limiting post (34). A second spring (35) is fixedly connected to the end of the limiting post (34) located in the first receiving groove (331). The end of the second spring (35) away from the limiting post (34) is fixedly connected to the inner end face of the first receiving groove (331). A second receiving groove (13) is provided on the inner end face of the second connecting groove (12) for insertion and cooperation with the limiting post (34).

3. The working well perimeter protection system according to claim 1, characterized in that: A baffle plate (2) is provided on the end of the precast pipe (1) that extends out of the ground. A fixing post (21) for inserting and cooperating with the limiting groove (14) is slidably provided on the bottom of the baffle plate (2). A locking pin (23) is provided on the baffle plate (2). A plurality of locking holes (211) for inserting and cooperating with the locking pin (23) are provided on the fixing post (21). A positioning component (5) for fixing the precast pipe (1) is provided inside the fixing post (21).

4. The working well perimeter protection system according to claim 3, characterized in that: The fixed column (21) has a second cavity (212). The positioning component (5) includes a rotating rod (51) passing through the fixed column (21), a connecting ring (52) fixedly sleeved on the rotating rod (51) in the second cavity (212), and a plug block (53) slidingly passing through the inner wall of the second cavity (212). One end of the plug block (53) slides and engages with the inner wall of the insertion hole (15). The other end of the plug block (53) is hinged with a second hinge rod (54). The second hinge rod (54) is hinged to the outer circumferential surface of the connecting ring (52). The enclosure plate (2) is provided with a rotating component (6) for driving the rotating rod (51) to rotate.

5. The working well perimeter protection system according to claim 4, characterized in that: The rotating assembly (6) includes a connecting sleeve (61) passing through the enclosure plate (2) and a handwheel (62) fixedly connected to the connecting sleeve (61). The connecting sleeve (61) is rotatably connected to the enclosure plate (2). The rotating rod (51) passes through the connecting sleeve (61). A guide block (511) is fixedly connected to the rotating rod (51). A guide groove (611) is provided on the inner side wall of the connecting sleeve (61) for sliding cooperation with the guide block (511).

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