Central drainage structure of road construction tunnel

Abstract

The invention relates to the technical field of tunnel construction drainage, in particular to a road construction tunnel center drainage structure which comprises a drainage pump body device and a drainage sewage treatment device corresponding to tunnel sewage drainage treatment. The water pumping end of the drainage pump body device is detachably and hermetically connected with a telescopic drainage pipeline; sealing joint pieces are rotationally mounted at the two ends of the telescopic drainage pipeline in a sealed manner, and one end of the telescopic drainage pipeline is in sealed butt joint with the drainage pump body device through the sealing joint pieces; and the other end of the telescopic drainage pipeline is provided with a connecting pipe which is detachably mounted on the sealing joint piece in a sealing manner. According to the device, the telescopic drainage pipeline can be arranged according to the number of pits in the center of a tunnel and the leakage condition of a tunnel wall so as to adapt to different construction conditions, the support structure can support the connecting pipe, force is applied to the water pipe positioning frame through the bottom shaft frame, and the top shaft frame is driven to be unfolded below the fixed mounting shaft disc; and stable placement of the connecting pipe is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel construction drainage, and in particular to a central drainage structure for a road construction tunnel. Background Art

[0002] At present, the drainage system behind the lining often adopts the construction method of annular and longitudinal drainage blind pipes. The drainage blind pipes are discharged out of the tunnel through the central ditch, or the accumulated water in the tunnel is directly pumped out using a pump.

[0003] A Chinese patent discloses a drainage system for tunnel construction (authorization announcement number CN114033486B). The patent technology discloses a drainage system for tunnel construction. The drainage system includes a carrier vehicle, a rear bracket is provided at the rear of the carrier vehicle, and the rear bracket is connected to the carrier vehicle through a first hydraulic cylinder. The first hydraulic cylinder is used to control the lifting and lowering of the rear bracket. The rear bracket is provided with a drainage device for draining water from potholes. The carrier vehicle includes a carrier body, a sealed box on the carrier body, and the drainage device pumps the water from the potholes into the sealed box. The drainage system of the invention drives the carrier vehicle into a tunnel where water has been pumped out. Under the action of the elastic member, the casters always contact the ground. When the casters are located in a pothole with water accumulation, when the two conductive rods simultaneously contact the water accumulation, the corresponding solenoid valve opens, so that the second water pumping pipe controlled by the solenoid valve is turned on, and the water accumulation at the place is pumped into the sealed box by starting the water pump. The drainage system is convenient for draining the water from the potholes. The system is easy to operate and has a high degree of automation. This patented technology solves the problem that both drainage methods are unable to drain the potholes in the tunnel, which still affects the subsequent tunnel construction.

[0004] However, in the prior art, the space during tunnel construction is limited, and there are multiple potholes in different areas of the tunnel construction. After the potholes are drained once, the accumulated water will seep out again after a long time. It is necessary to solve the problem of automatically pumping out and draining the accumulated water from multiple potholes during tunnel construction in the prior art.

[0005] Therefore, those skilled in the art provide a central drainage structure for a road construction tunnel to solve the problems raised in the above background technology. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides: A central drainage structure for a road construction tunnel comprises: a drainage pump body device and a drainage sewage treatment device corresponding to the sewage discharge treatment of the tunnel; the water pump end of the drainage pump body device is detachably and sealably connected with a telescopic drainage pipe; both ends of the telescopic drainage pipe are sealed and rotatably mounted with sealing joints, and one end of the telescopic drainage pipe is sealed and docked with the drainage pump body device through the sealing joint; the other end of the telescopic drainage pipe is provided with a connecting pipe detachably and sealably mounted on the sealing joint; a sub-sealing joint is connected through the bottom of the connecting pipe, and a female sealing joint is spirally locked and sealed on the outer side of the sub-sealing joint, and a telescopic water pumping pipe for pumping out water accumulated in a construction pothole in the tunnel is connected to the bottom of the female sealing joint; a bracket structure is provided on the outer side of the connecting pipe to support it and place it above the construction pothole in the road; and a leakage collection structure for draining water from the leakage of the side wall or the top wall during construction in the tunnel is detachably assembled on the bracket structure, a leakage joint is penetrated through the connecting pipe, and the leakage collection structure forms a drainage connection with the connecting pipe through the leakage joint.

[0007] Preferably: an anti-blocking pumping head placed in the tunnel pit water collection is installed at the bottom end of the telescopic pumping pipe, and a water immersion sensor for water source detection is installed inside the anti-blocking pumping head, the inner wall of the anti-blocking pumping head is annular and equidistantly provided with four side water inlets for water discharge, and the bottom inner wall of the anti-blocking pumping head is provided with a plurality of bottom water inlets for bottom water discharge, and a solenoid valve is installed on the sub-sealing joint.

[0008] Preferably: a plurality of connecting pipes are sealed and connected via the telescopic drainage pipe, and a sealing plug is spirally sealed on the inner side of one end of the connecting pipe in a group away from the telescopic drainage pipe.

[0009] Preferably: the support structure includes a fixedly mounted shaft disk, two top shaft frames are rotatably mounted on the bottom of the fixedly mounted shaft disk, a corresponding number of bottom shaft frames are arranged below the top shaft frames, rail grooves are opened on the inner walls of the top shaft frames and the bottom shaft frames, a water pipe positioning frame is provided for sliding limitation between the top shaft frames and the bottom shaft frames, the water pipe positioning frame is provided with rail plates corresponding to the rail groove positions of the top shaft frames and the bottom shaft frames, and the water pipe positioning frame is slidably limited in the rail grooves of the top shaft frames and the bottom shaft frames through the rail plates.

[0010] Preferably, the inner side walls of the top shaft frame and the bottom shaft frame are both spirally locked and equipped with a plurality of locking bolts, and the water pipe positioning frame is provided with transverse grooves at positions corresponding to the locking bolts.

[0011] Preferably: the number of the bottom axis frames is two, and the two bottom axis frames are horizontally flipped and arranged at the bottom of the water pipe positioning frame, a stabilizing shaft rod is rotatably installed on one side of the bottom of the bottom axis frame, and a storage limiting rod is provided corresponding to the receiving card on the stabilizing shaft rod, the storage limiting rod is movably arranged inside the bottom axis frame, and a spring is installed between the storage limiting rod and the inner wall of the bottom axis frame.

[0012] Preferably: the water leakage collection structure includes a locking disc adjustment frame which can be locked and fixed on the fixed installation shaft disc using external bolts according to the annular angular position, and a leakage bottom connecting pipe is fixedly installed on the top of the locking disc adjustment frame.

[0013] Preferably: a leak-connecting top pipe is provided above the leak-connecting bottom pipe, and an adjustable telescopic pipe with adjustable height is sealed and assembled between the leak-connecting bottom pipe and the leak-connecting top pipe.

[0014] Preferably: a one-way valve is installed on the top of the leak-proof top pipe, and the top of the one-way valve is sealedly connected to a leak-proof telescopic pipe, and the top of the leak-proof telescopic pipe is connected to a leak-proof top hopper for collecting water seepage from the tunnel wall.

[0015] Preferably: an adjustment bracket is fixedly installed on the outside of the leakage receiving top hopper, the adjustment bracket is rotatably installed on the outer wall of the leakage receiving top pipe, and a worm gear shaft is fixedly installed on the outer wall of one side of the adjustment bracket, the worm gear shaft is geared with a worm, and the worm gear is assembled on the outer wall of the leakage receiving top pipe.

[0016] Technical effects and advantages of the present invention: In the present invention, the telescopic drainage pipe can be set according to the number of potholes in the center of the tunnel and the leakage of the tunnel wall to adapt to different construction conditions. The bracket structure can support the connecting pipe and apply force to the water pipe positioning frame through the bottom shaft frame, driving the top shaft frame to unfold under the fixed installation shaft disc, thereby realizing stable placement of the connecting pipe.

[0017] In the present invention, the connecting pipe is placed between the water pipe positioning frames, and the position of the water pipe positioning frames is locked by rotating the locking bolt to ensure the stability of the connecting pipe. The telescopic water pumping pipe is connected to the sub-sealing joint through a spiral seal of the female sealing joint, and the water pumping head is placed in the pits constructed in the tunnel, so that the water immersion sensor is inside the water. When the water source is sensed, the signal is fed back to the control cabinet, the solenoid valve is turned on, and automatic drainage is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a central drainage structure of a road construction tunnel provided by this application; Figure 2 This is a schematic diagram of a central drainage structure of a road construction tunnel provided by the present application, viewed from above; Figure 3 This is a schematic diagram of the structure of a connecting pipe in a central drainage structure of a road construction tunnel provided by the present application; Figure 4 It is a structural schematic diagram of a side water inlet in a central drainage structure of a road construction tunnel provided by the present application; Figure 5It is a structural schematic diagram of a support structure in a central drainage structure of a road construction tunnel provided by the present application; Figure 6 This is a schematic diagram of a structure of a fixedly installed shaft disc in a central drainage structure of a road construction tunnel provided by the present application; Figure 7 This is a schematic diagram of the split structure of a support structure in a central drainage structure of a road construction tunnel provided by the present application; Figure 8 This application provides a road construction tunnel center drainage structure Figure 7 The structural diagram at A in the middle; Fig. 9 It is a structural schematic diagram of a locking disc adjustment frame in a central drainage structure of a road construction tunnel provided by the present application; Fig.10 It is a structural schematic diagram of an adjusting bracket in a central drainage structure of a road construction tunnel provided in this application.

[0019] In the figure: 1. Drainage pump body device; 2. Drainage sewage treatment device; 3. Telescopic drainage pipe; 4. Connecting pipe; 5. Bracket structure; 501. Fixed mounting shaft disc; 502. Top shaft frame; 503. Water pipe positioning frame; 504. Locking bolt; 505. Bottom shaft frame; 506. Self-locking universal wheel; 507. Stable shaft rod; 508. Storage limit rod; 509. Spring; 6. Leakage collection structure; 601. Locking plate adjustment frame; 602. Connecting bottom pipe; 603. Adjusting telescopic pipe; 604. Connecting top pipe; 605. Adjusting bracket; 606. Connecting top bucket; 607. Connecting telescopic pipe; 608. Check valve; 609. Worm shaft; 610. Worm; 611. Screw plate; 612. Screw frame; 613. Hand wheel; 614. Drainage telescopic pipe; 615. Screw joint; 7. Sealing joint; 8. Sub-sealing joint; 9. Solenoid valve; 10. Female sealing joint; 11. Telescopic water pumping pipe; 12. Anti-blocking water pumping head; 13. Side water inlet; 14. Bottom water inlet; 15. Water immersion sensor; 16. Sealing plug; 17. Leaking joint. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0021] For example, see Figures 1 to 4 In this embodiment, a central drainage structure for a road construction tunnel is provided, comprising: a drainage pump body device 1 and a drainage sewage treatment device 2 corresponding to the sewage discharge treatment of the tunnel; the water pump end of the drainage pump body device 1 is detachably and sealedly connected with a telescopic drainage pipe 3; both ends of the telescopic drainage pipe 3 are sealed and rotatably installed with sealing joints 7, and one end of the telescopic drainage pipe 3 is sealed and connected to the drainage pump body device 1 through the sealing joint 7; the other end of the telescopic drainage pipe 3 is provided with a connecting pipe 4 detachably and sealingly installed on the sealing joint 7; the bottom of the connecting pipe 4 is connected with a sub- A sealing joint 8 is provided, and a female sealing joint 10 is spirally locked and sealed on the outer side of the sub-sealing joint 8, and a telescopic suction pipe 11 for extracting water from the construction potholes in the tunnel is connected to the bottom of the female sealing joint 10; a support structure 5 is provided on the outer side of the connecting pipe 4 to support it and place it above the construction potholes in the road; and a leakage collection structure 6 for draining water from the side walls or top walls during construction in the tunnel can be detachably assembled on the support structure 5, and a leakage joint 17 is penetrated on the connecting pipe 4, and the leakage collection structure 6 forms a drainage connection with the connecting pipe 4 through the leakage joint 17.

[0022] The bottom end of the telescopic pumping pipe 11 is equipped with an anti-blocking pumping head 12 placed in the tunnel pothole water collection, and a water immersion sensor 15 for water source detection is installed inside the anti-blocking pumping head 12. The inner wall of the anti-blocking pumping head 12 is annular and equidistantly provided with four side water inlets 13 for water discharge, and the bottom inner wall of the anti-blocking pumping head 12 is provided with a plurality of bottom water inlets 14 for bottom water discharge, and a solenoid valve 9 is installed on the sub-sealing joint 8.

[0023] The solenoid valve 9 is electrically fused to the water immersion sensor 15, and the water immersion sensor 15 is used to monitor the signal when the water in the tunnel pothole is completely pumped out and when water accumulates again inside the tunnel pothole, and feeds the signal back to the solenoid valve 9, and opens and closes the solenoid valve 9 according to the signal content.

[0024] The plurality of connecting pipes 4 are sealed and connected via the telescopic drainage pipe 3 , and a sealing plug 16 is spirally sealed on the inner side of one end of the connecting pipe 4 in a group away from the telescopic drainage pipe 3 .

[0025] The sealing plug 16 can seal the connecting pipe 4 and one end of the telescopic drainage pipe 3 connected in a group.

[0026] For example 2, please refer to Figures 5 to 8 In this embodiment, a support structure 5 in a central drainage structure of a road construction tunnel is provided; The support structure 5 includes a fixedly installed shaft disc 501, and two top shaft frames 502 are rotatably installed at the bottom of the fixedly installed shaft disc 501. A corresponding number of bottom shaft frames 505 are arranged below the top shaft frames 502. The inner walls of the top shaft frames 502 and the bottom shaft frames 505 are both provided with rail grooves. A water pipe positioning frame 503 is provided for sliding limitation between the top shaft frames 502 and the bottom shaft frames 505. The water pipe positioning frame 503 is provided with rail plates corresponding to the rail groove positions of the top shaft frames 502 and the bottom shaft frames 505, and the water pipe positioning frame 503 is slidably limited in the rail grooves of the top shaft frames 502 and the bottom shaft frames 505 through the rail plates.

[0027] The water pipe positioning frame 503 can move along the rail groove through the rail plate, and then adjust the position to approach the connecting pipe 4 to position it.

[0028] The inner side walls of the top shaft frame 502 and the bottom shaft frame 505 are both spirally locked with a plurality of locking bolts 504 , and the water pipe positioning frame 503 is provided with transverse grooves corresponding to the positions of the locking bolts 504 .

[0029] When the water pipe positioning frame 503 moves along the track grooves of the top shaft frame 502 and the bottom shaft frame 505 through the track plate, the transverse groove can move along the locking bolt 504, so that the locking bolt 504 can be rotated to lock the water pipe positioning frame 503 between the top shaft frame 502 and the bottom shaft frame 505.

[0030] There are two bottom axis frames 505 in total, and the two bottom axis frames 505 are horizontally flipped and arranged at the bottom of the water pipe positioning frame 503. A stabilizing shaft rod 507 is rotatably installed on one side of the bottom of the bottom axis frame 505. The stabilizing shaft rod 507 is provided with a storage limiting rod 508 corresponding to the receiving card. The storage limiting rod 508 is movably arranged inside the bottom axis frame 505, and a spring 509 is installed between the storage limiting rod 508 and the inner wall of the bottom axis frame 505.

[0031] The spring 509 is used to rebound and reset the storage limit rod 508 after it is compressed into the bottom shaft frame 505. A movable self-locking universal wheel 506 is installed at the bottom of the bottom shaft frame 505.

[0032] For example 3, please refer to Figures 9-10 In this embodiment, a water leakage collection structure 6 in a central drainage structure of a road construction tunnel is provided; The water leakage collection structure 6 includes a locking disc adjustment frame 601 which can be locked and fixed on the fixed installation shaft disc 501 using external bolts according to the annular angle position, and a leakage bottom pipe 602 is fixedly installed on the top of the locking disc adjustment frame 601.

[0033] The fixed installation shaft disc 501 and the locking disc adjustment frame 601 are respectively provided with four installation holes. After the locking disc adjustment frame 601 is adjusted to the angle of the wall in the tunnel, it can be aligned with the installation holes on the fixed installation shaft disc 501 and locked and fixed by external bolts.

[0034] A top leak pipe 604 is provided above the bottom leak pipe 602 , and a height-adjustable telescopic pipe 603 is sealed between the bottom leak pipe 602 and the top leak pipe 604 . The telescopic pipe 603 is used to transfer the water source in the top leak pipe 604 to the bottom leak pipe 602 .

[0035] A one-way valve 608 is installed on the top of the leak-proof top pipe 604, and the top of the one-way valve 608 is sealed and connected to a leak-proof telescopic pipe 607. The top of the leak-proof telescopic pipe 607 is connected to a leak-proof top hopper 606 for collecting water seepage from the tunnel wall. The leak-proof top hopper 606 can transmit leaking water to the leak-proof top pipe 604 at any angle through the leak-proof telescopic pipe 607.

[0036] An adjustment bracket 605 is fixedly installed on the outside of the leakage receiving top hopper 606, and the adjustment bracket 605 is rotatably installed on the outer wall of the leakage receiving top pipe 604. A worm gear shaft 609 is fixedly installed on the outer wall of one side of the adjustment bracket 605, and the worm gear shaft 609 is transmission-engaged with a worm 610, which is assembled on the outer wall of the leakage receiving top pipe 604.

[0037] Both ends of the worm 610 are fixedly equipped with cross rods that can be manually rotated by personnel.

[0038] The outer wall of the bottom leakage pipe 602 is fixedly installed with a screw frame 612, a screw rod is rotatably installed inside the screw frame 612, and the bottom end of the screw rod is rotatably penetrated and fixedly installed with a hand wheel 613 outside the screw frame 612, and a screw plate 611 is movably sleeved outside the screw frame 612, and the screw plate 611 is fixedly installed on the outer wall of the top leakage pipe 604, and a spiral transmission is arranged between the screw rod and the screw plate 611; The side of the bottom leaking pipe 602 is connected with a drainage telescopic pipe 614, and one end of the drainage telescopic pipe 614 is rotatably mounted with a spiral joint 615. The bottom leaking pipe 602 is sealed and connected to the leaking joint 17 through the spiral joint 615 of the drainage telescopic pipe 614.

[0039] According to the above embodiments, the working principle of the present invention is: The drainage pump device 1 and the drainage sewage treatment device 2 are both controlled by an external control cabinet, and the control cabinet is control-connected with the solenoid valve 9 and the water immersion sensor 15 thereof.

[0040] The drainage pump body device 1 provides necessary drainage suction for the telescopic drainage pipe 3 and its connecting pipe 4. The number of connecting pipes 4 is set according to the number of potholes in the construction of the tunnel center and the leakage of the tunnel wall.

[0041] Before connecting the connecting pipe 4 to the telescopic drainage pipe 3, it needs to be supported and placed by the support structure 5. The support structure 5 applies force to the water pipe positioning frame 503 through the bottom shaft frame 505, so that the top shaft frame 502 is unfolded under the fixed installation shaft disc 501. Then, the storage limit rod 508 is manually operated to position the two bottom shaft frames 505.

[0042] The connecting pipe 4 is placed between the two water pipe positioning frames 503, and its position is determined by adjusting the movement of the water pipe positioning frames 503 in the rail groove. After the position is determined, the position of the water pipe positioning frames 503 is locked by rotating the locking bolt 504, thereby completing the support and placement of the connecting pipe 4.

[0043] At the potholes constructed in the tunnel, the connecting pipe 4 is connected to the telescopic pumping pipe 11. The telescopic pumping pipe 11 is spirally sealed and connected with the sub-sealing joint 8 through the female sealing joint 10, and the anti-blocking pumping head 12 of the telescopic pumping pipe 11 is placed at the potholes constructed in the tunnel. When the water immersion sensor 15 senses the accumulated water, it feeds back the signal to the control cabinet, thereby starting the solenoid valve 9, so that the accumulated water in the potholes is discharged into the connecting pipe 4 through the telescopic pumping pipe 11. On the contrary, when the water in the potholes is pumped out, the water immersion sensor 15 lacks water source sensing, and feeds back the signal to the control cabinet, thereby closing the solenoid valve 9, realizing the automatic drainage of the accumulated water in the potholes in the tunnel.

[0044] The water leakage collection structure 6 can collect water leakage from the side walls and the top tunnel wall during construction in the tunnel. When collecting, corresponding connecting pipes 4 and their support structures 5 can be set according to the position of the walls in the tunnel, and then connected with other connecting pipes 4 through the telescopic drainage pipe 3 to form a sealed drainage system.

[0045] For water leakage collection on the side walls of the tunnel, the annular angle of the leak-collecting top bucket 606 can be adjusted according to the position of the wall. After the mounting holes of the corresponding locking plate adjustment bracket 601 are aligned with the mounting holes of the fixed mounting shaft disc 501, they are fixed with external bolts. The cross-rotating rod is driven by manual rotation, and the worm 610 is rotated and engaged with the worm gear shaft 609 to rotate, thereby adjusting the angle of the leak-collecting top bucket 606 on the bracket 605 to achieve leak-collecting treatment of water seepage on the tunnel wall.

[0046] For the leakage treatment of the top wall inside the tunnel, the hand wheel 613 can be manually rotated to drive the screw rod to rotate. The rotation of the screw rod drives the screw plate 611 to move through the spiral transmission, thereby driving the leakage top pipe 604 to adjust the height. At the same time, the distance between the leakage top pipe 604 and the leakage bottom pipe 602 can be adjusted by adjusting the telescopic pipe 603, so that the leakage top bucket 606 is close to the water seepage point of the top wall in the tunnel to achieve leakage treatment.

[0047] In the present invention, unless otherwise clearly stipulated and limited, for example, it can be a fixed connection, a detachable connection, or an integrated one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0048] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A central drainage structure for a road construction tunnel, comprising a drainage pump device (1) and a drainage sewage treatment device (2) for corresponding tunnel sewage discharge treatment, wherein the pumping end of the drainage pump device (1) is detachably and hermetically connected to a telescopic drainage pipe (3); characterized in that: Both ends of the telescopic drainage pipe (3) are sealed and rotatably mounted with sealing joints (7), and one end of the telescopic drainage pipe (3) is sealed and butted against the drainage pump body device (1) via the sealing joint (7); The other end of the telescopic drainage pipe (3) is provided with a connecting pipe (4) which is detachably and sealingly mounted on a sealing joint piece (7); The bottom of the connecting pipe (4) is connected through a sub-sealing joint (8), and a female sealing joint (10) is provided on the outer side of the sub-sealing joint (8) for spiral locking and sealing. The bottom of the female sealing joint (10) is connected to a telescopic water extraction pipe (11) for extracting water from a construction pit in the tunnel; The outer side of the connecting pipe (4) is provided with a support structure (5) for supporting the connecting pipe (4) and placing it above the construction pothole in the road; Furthermore, a water leakage collection structure (6) for draining water from a side wall or a top wall during construction in a tunnel can be detachably mounted on the support structure (5); a water leakage joint (17) is provided through the connecting pipe (4); and the water leakage collection structure (6) forms a drainage connection with the connecting pipe (4) via the water leakage joint (17).

2. A central drainage structure for a road construction tunnel according to claim 1, characterized in that: The bottom end of the telescopic pumping pipe (11) is provided with an anti-blocking pumping head (12) placed in the water in the tunnel pothole, and a water immersion sensor (15) for detecting the water source is installed inside the anti-blocking pumping head (12). The inner wall of the anti-blocking pumping head (12) is provided with four side water inlets (13) for water source discharge at equal intervals in a circular shape, and the bottom inner wall of the anti-blocking pumping head (12) is provided with a plurality of bottom water inlets (14) for bottom water source discharge, and a solenoid valve (9) is installed on the sub-sealing joint (8).

3. A central drainage structure for a road construction tunnel according to claim 1, characterized in that: The plurality of connecting pipes (4) are sealed and connected via the telescopic drainage pipe (3), and a sealing plug (16) is spirally sealed on the inner side of one end of the connecting pipe (4) away from the telescopic drainage pipe (3).

4. A central drainage structure for a road construction tunnel according to claim 1, characterized in that: The support structure (5) comprises a fixedly mounted shaft disc (501), the bottom of which is rotatably mounted with two top shaft frames (502), a corresponding number of bottom shaft frames (505) being arranged below the top shaft frames (502), inner walls of the top shaft frames (502) and the bottom shaft frames (505) being provided with rail grooves, a water pipe positioning frame (503) being provided between the top shaft frames (502) and the bottom shaft frames (505) for sliding limitation, a rail plate being provided on the water pipe positioning frame (503) corresponding to the rail groove positions of the top shaft frames (502) and the bottom shaft frames (505), and the water pipe positioning frame (503) being slidably limited in the rail grooves of the top shaft frames (502) and the bottom shaft frames (505), and the water pipe positioning frame (503) being slidably limited in the rail grooves of the top shaft frames (502) and the bottom shaft frames (505) through the rail plate.

5. A central drainage structure for a road construction tunnel according to claim 4, characterized in that: The inner side walls of the top shaft frame (502) and the bottom shaft frame (505) are both spirally locked with a plurality of locking bolts (504), and the water pipe positioning frame (503) is provided with transverse grooves at positions corresponding to the locking bolts (504).

6. A central drainage structure for a road construction tunnel according to claim 5, characterized in that: There are two bottom shaft frames (505) in total, and the two bottom shaft frames (505) are horizontally flipped and arranged at the bottom of the water pipe positioning frame (503). A stabilizing shaft rod (507) is rotatably installed on one side of the bottom of the bottom shaft frame (505). The stabilizing shaft rod (507) is provided with a storage limiting rod (508) corresponding to the receiving card. The storage limiting rod (508) is movably arranged inside the bottom shaft frame (505), and a spring (509) is installed between the storage limiting rod (508) and the inner wall of the bottom shaft frame (505).

7. A central drainage structure for a road construction tunnel according to claim 4, characterized in that: The water leakage collection structure (6) comprises a locking disc adjustment frame (601) which can be locked and fixed on the fixed installation shaft disc (501) using external bolts according to the annular angle position, and a leakage bottom connecting pipe (602) is fixedly installed on the top of the locking disc adjustment frame (601).

8. A central drainage structure for a road construction tunnel according to claim 7, characterized in that: A leak-connecting top pipe (604) is provided above the leak-connecting bottom pipe (602), and an adjustable telescopic pipe (603) capable of adjusting height is sealedly installed between the leak-connecting bottom pipe (602) and the leak-connecting top pipe (604).

9. A central drainage structure for a road construction tunnel according to claim 8, characterized in that: A one-way valve (608) is installed on the top of the leak-proof top pipe (604), and the top of the one-way valve (608) is sealedly connected to a leak-proof telescopic pipe (607), and the top of the leak-proof telescopic pipe (607) is connected to a leak-proof top hopper (606) for collecting water seepage from the tunnel wall.

10. A central drainage structure for a road construction tunnel according to claim 9, characterized in that: An adjusting bracket (605) is fixedly mounted on the outside of the leak-collecting hopper (606), the adjusting bracket (605) being rotatably mounted on the outer wall of the leak-collecting hopper (604), and a worm gear shaft (609) is fixedly mounted on the outer wall of one side of the adjusting bracket (605), the worm gear shaft (609) being transmission-engaged with a worm (610), and the worm gear (610) is mounted on the outer wall of the leak-collecting hopper (604).

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