Adsorption type tunnel segment anti-seepage test device and test method

Abstract

The present invention discloses an adsorption-type tunnel segment anti-seepage test device and a test method, which relate to the technical field of tunnel segment anti-seepage detection, and include an anti-seepage test bench, the anti-seepage test bench includes two support pedestals, a top beam and two bottom beams, the two support pedestals are symmetrically arranged on a foundation, the top beam is located between the two support pedestals, the two bottom beams are symmetrically arranged between the two support pedestals, and the two ends of the two bottom beams are respectively fixedly connected to the two support pedestals, the bottom beam is used for placing the segment, the segment is located below the top beam, a hinged joint is provided at the bottom of the top beam, a retractable supporting connecting rod is rotatably connected at the bottom of the hinged joint, and an adsorption mechanism for adsorbing and fixing the segment is connected at the bottom of the supporting connecting rod. The present invention adopts a vacuum negative pressure method to fix the adsorption mechanism on the segment, which shortens the time required for disassembly and assembly of the device, improves the inspection efficiency, and the adsorption mechanism can flexibly select a fixed point, and has strong adaptability.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel segment anti-seepage detection, and in particular to an adsorption-type tunnel segment anti-seepage test device and a test method. Background Art

[0002] In the construction of subway section tunnels, the shield method is generally used. The tunnel is assembled from multiple segments, and multiple longitudinal and circumferential seams will be formed between the tunnel segments. It is the existence of these gaps that makes water leakage one of the main problems affecting the normal operation of the subway. In addition, since there is no waterproof layer on the outside of the shield tunnel, the waterproof performance of the segment concrete itself becomes more important. Therefore, at present, the segments are generally subjected to anti-seepage tests before leaving the factory.

[0003] In the prior art, the pipe segment is generally placed on a supine rigid specimen support seat, on which a water tank is provided, and around which a rubber sealing pad is provided. Finally, the supine rigid specimen support seat is pressed against the outer arc surface of the pipe segment by means of fastening screws and transverse pressure members, and pressurized water is injected into the water tank during the anti-seepage test. However, due to the large rigidity of the rigid support, even with the provision of a rubber sealing pad, it is often impossible to achieve a close fit, and it is often necessary to use glass glue or the like to fill the gap; in addition, by using the compression method of the transverse pressure member and the fastening screw, during the installation process, the transverse pressure member with a larger deadweight is provided on the inner arc surface, and finally connected to the supine rigid specimen support seat on the outer arc surface by means of the fastening screw, which may cause uneven force on the pipe segment and cause cracks; at the same time, the current anti-seepage detection device consumes a large amount of labor and working hours, and has a low detection efficiency.

[0004] Aiming at the above problems, an adsorption-type tunnel segment anti-seepage test device and test method are proposed. Summary of the invention

[0005] The object of the present invention is to provide an adsorption-type tunnel segment anti-seepage test device and test method to solve the above-mentioned problems.

[0006] In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

[0007] The invention relates to an adsorption-type tunnel segment anti-seepage test device, comprising an anti-seepage test bench, the anti-seepage test bench comprising two support pedestals, a top beam and two bottom beams, the two support pedestals are symmetrically arranged on a foundation, the top beam is located between the two support pedestals, the two bottom beams are symmetrically arranged between the two support pedestals, and both ends of the two bottom beams are respectively fixedly connected to the two support pedestals, the bottom beam is used to place the segment, the segment is located below the top beam, a hinge joint is provided at the bottom of the top beam, a retractable support connecting rod is rotatably connected to the bottom of the hinge joint, an adsorption mechanism for adsorbing and fixing the segment is connected to the bottom of the support connecting rod, the adsorption mechanism comprises a rigid bracket, a suction cup assembly and a pressure plate, the suction cup assembly is located below the rigid bracket, the pressure plate is located inside the suction cup assembly, the rigid bracket and the suction cup assembly are connected by fasteners, a connecting support is fixedly connected to the middle position of the top of the rigid bracket, and the top of the connecting support is detachably connected to the support connecting rod.

[0008] As a preferred solution of the present invention, the rigid support includes an outer ring frame beam and an inner support beam, and the inner support beam is located inside the outer ring frame beam and is welded to the outer ring frame beam.

[0009] As a preferred embodiment of the present invention, the suction cup assembly includes multiple suction cup bases, multiple rubber strips and a rubber plate, all of the suction cup bases are evenly arranged along the bottom of the outer ring frame, all of the rubber strips are arranged between two adjacent suction cup bases and are fixedly connected to the suction cup bases, the rubber plate is located in a space enclosed by the multiple rubber strips and the multiple suction cup bases, and all of the rubber strips and all of the suction cup bases are fixedly connected to the outer wall of the rubber plate, the rubber plate, all of the rubber strips and all of the suction cup bases enclose a cavity, one of the rubber strips is plugged with a water inlet pipe, the water inlet pipe penetrates the rubber strip and extends into the cavity, and a water outlet pipe is plugged into the rubber plate, the water outlet pipe penetrates the rubber plate and extends into the cavity.

[0010] As a preferred solution of the present invention, the suction cup base includes a suction cup steel seat and a rubber sleeve, the upper part of the suction cup steel seat is a hollow conduit, the outer side of the top of the hollow conduit is provided with an external thread, and the outer side of the top of the hollow conduit is threadedly connected with a nut through the external thread, the lower part of the suction cup steel seat is a truncated cone base, and a negative pressure chamber is provided in the middle of the suction cup steel seat, and the negative pressure chamber is a hollow structure, the rubber sleeve is arranged on the outer side of the bottom end of the suction cup steel seat, and the outer wall of the rubber sleeve is fixedly connected to the rubber strip and the rubber plate respectively, and the bottom of the rubber sleeve is flush with the bottom of the rubber plate.

[0011] As a preferred solution of the present invention, the fastener includes a top bolt, a bottom bolt and a wedge-shaped pressure head, and a plurality of reserved holes are arranged on the outer ring frame beam and the inner support beam. The upper sides of all the reserved holes are provided with internal threads, and the lower sides of all the reserved holes are provided with flanges for preventing the bottom bolts from falling out, and through holes for the hollow conduit on the upper part of the suction cup steel seat to pass through are opened on the four corners of the outer ring frame beam.

[0012] As a preferred solution of the present invention, the top bolt is threadedly connected to the reserved hole, the top of the bottom bolt is threadedly connected to the top bolt, short screws are fixedly provided on the upper part of the wedge-shaped pressure head and the top of the pressure plate, and all the short screws are located directly below the inner support beam, and a threaded cavity with a thread is opened at the bottom of the bottom bolt, and the tops of all the short screws are threadedly connected to the threaded cavity at the bottom of the bottom bolt.

[0013] As a preferred solution of the present invention, the wedge-shaped pressure heads of all fasteners are evenly arranged below the outer ring frame beam, and the lower parts of all the wedge-shaped pressure heads abut against the top of the rubber strip.

[0014] As a preferred solution of the present invention, a sliding groove is provided at the bottom of the top beam, the hinge head is slidably connected to the sliding groove, sliding rails are provided on opposite sides of the tops of the two support pedestals, and the two ends of the top beam are respectively slidably connected to the two sliding rails.

[0015] A test method for an adsorption-type tunnel segment anti-seepage test device comprises the following steps:

[0016] S1. Two support pedestals, a top beam and two bottom beams are made into an anti-seepage test bench, and a plurality of pipe segments are sequentially spliced ​​and placed on the bottom beams of the anti-seepage test bench;

[0017] S2, after fixing the adsorption mechanism at the bottom of the supporting connecting rod, move the adsorption mechanism to the anti-seepage test area determined on the upper part of the segment by moving the top beam and the connecting rod, and lower the adsorption mechanism until the suction cup assembly is in close contact with the outer curved surface of the segment by adjusting the length of the supporting connecting rod;

[0018] S3, connecting the adsorption mechanism to an external negative pressure device, and then starting the negative pressure device to form negative pressure in the adsorption mechanism, so that the adsorption mechanism is fixed on the outer curved surface of the pipe segment;

[0019] S4. Adjust the fasteners to adjust the rubber strip to fit tightly against the outer curved surface of the segment;

[0020] S5. Adjust the fasteners to adjust the pressure plate to fit tightly with the suction cup assembly;

[0021] S6. Open the water inlet pipe and the water outlet pipe, and inject water into the suction cup assembly through the water inlet pipe by means of a water injection pressure device until the water enters the upper part of the outer arc surface of the pipe segment for an anti-seepage test. When water overflows from the water outlet pipe, close the water outlet;

[0022] S7. Use the water inlet pipe to load the test water pressure. When the water pressure reaches a certain level, if the joints are not tightly attached or the joint water-stopping structure fails, water will seep downward through the joints between the segments. By observing whether there are water stains or dripping at the bottom of the segments, it can be judged according to relevant specifications whether the segment joint water seepage meets the requirements;

[0023] S8. After the observation is completed, the water in the cavity of the suction cup assembly is drained, and then the negative pressure loading device is closed, the adsorption mechanism is removed, and the water seepage depth of the segment concrete is detected to complete the entire anti-seepage test.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The present invention has simple operation steps and only needs to be operated on one side of the pipe segment. The cooperation between the adsorption mechanism and the external negative pressure device can fix the adsorption mechanism by means of vacuum negative pressure, so that the adsorption mechanism is fixed on the pipe segment, and the adsorption mechanism is easy to move and disassemble, which not only saves labor and shortens the time required for disassembly and assembly of the device, but also can greatly shorten the time required for inspection of the pipe segment and improve the inspection efficiency. It is particularly suitable for inspection of a large number of pipe segments. In addition, the adsorption mechanism can flexibly select the fixed point and has strong adaptability.

[0026] 2. The cooperation between the suction cup assembly and the fastener can accurately control the close contact effect between the suction cup assembly and the pipe segment 3 at multiple points, thereby reducing the number of test reworks and effectively improving the test efficiency.

[0027] 3. In the present invention, the test process has low requirements on the production and manual operation accuracy of the rigid bracket. Even if there is a certain difference between the rigid bracket and the outer arc surface of the pipe segment, the wedge-shaped head can ensure the close fitting effect of the suction cup assembly. The overall test is more convenient and faster than the existing technology and has stronger applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0029] Figure 1 An overall structural schematic diagram of an adsorption-type tunnel segment anti-seepage test device and a test method is provided for an embodiment of the present invention;

[0030] Figure 2 A front structural cross-sectional view of an adsorption-type tunnel segment anti-seepage test device is provided for an embodiment of the present invention;

[0031] Figure 3 A side cross-sectional view of an adsorption mechanism is provided for an embodiment of the present invention;

[0032] Figure 4 A schematic diagram of a three-dimensional structure of an adsorption mechanism is provided for an embodiment of the present invention;

[0033] Figure 5 A partial structural schematic diagram of a rigid bracket is provided for an embodiment of the present invention;

[0034] Figure 6 A partial structural schematic diagram of a suction cup assembly is provided for an embodiment of the present invention;

[0035] Figure 7 A partial structural schematic diagram of a pressing plate is provided for an embodiment of the present invention;

[0036] Figure 8 A schematic diagram of a connection structure of a fastener is provided for an embodiment of the present invention;

[0037] Fig. 9 A structural schematic diagram of a suction cup steel seat is provided for an embodiment of the present invention;

[0038] Fig.10 Another schematic diagram of the shape structure of the adsorption mechanism is provided for the embodiment of the present invention.

[0039] The numbers in the figure represent the following:

[0040] 1. Anti-seepage test bench; 2. Support pedestal; 3. Pipe segment; 4. Top beam; 5. Support connecting rod; 6. Bottom beam; 7. Hinge joint; 8. Adsorption mechanism; 9. Slide rail;

[0041] 20. Rigid bracket; 21. Outer ring frame beam; 22. Inner support beam; 23. Reserved hole; 24. Support; 25. Through hole; 30. Suction cup assembly; 31. Suction cup steel seat; 32. Rubber sleeve; 33. Rubber strip; 34. Rubber sheet; 35. Water inlet pipe; 36. Water outlet pipe; 37. Negative pressure chamber; 38. Cavity; 39. Hollow conduit; 40. Press plate; 41. Short screw; 42. Nut; 50. Fastener; 51. Top bolt; 52. Bottom bolt; 53. Wedge-shaped pressure head. DETAILED DESCRIPTION

[0042] 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.

[0043] like Figures 1 to 10 As shown, the present invention provides an adsorption-type tunnel segment anti-seepage test device, including an anti-seepage test bench 1, the anti-seepage test bench 1 includes two support seats 2, a top beam 4 and two bottom beams 6, the two support seats 2 are symmetrically arranged on the foundation, the top beam 4 is located between the two support seats 2, the two bottom beams 6 are symmetrically arranged between the two support seats 2, and the two ends of the two bottom beams 6 are respectively fixedly connected to the two support seats 2, the bottom beam 6 is used to place the segment 3, the segment 3 is located below the top beam 4, and the bottom of the top beam 4 is provided with a hinge joint 7, the A retractable supporting link 5 is rotatably connected to the bottom of the hinged head 7, and an adsorption mechanism 8 for adsorbing and fixing the pipe segment 3 is connected to the bottom of the supporting link 5. The adsorption mechanism 8 includes a rigid bracket 20, a suction cup assembly 30 and a pressure plate 40. The suction cup assembly 30 is located below the rigid bracket 20, and the pressure plate 40 is located inside the suction cup assembly 30. The rigid bracket 20 and the suction cup assembly 30 are both connected by fasteners 50. A connecting support 24 is fixedly connected to the middle position of the top of the rigid bracket 20, and the top of the connecting support 24 is detachably connected to the supporting link 5.

[0044] A slide groove is provided at the bottom of the top beam 4, and the hinge head 7 is slidably connected to the slide groove. Slide rails 9 are provided on opposite sides of the tops of the two support pedestals 2, and both ends of the top beam 4 are slidably connected to the two slide rails 9 respectively.

[0045] When the present invention is in use, firstly, two supporting pedestals 2, a top beam 4 and two bottom beams 6 are assembled and installed to form an anti-seepage test bench 1, then the segment 3 is placed on the bottom beam 6 of the anti-seepage test bench 1, and the top beam 4 is moved to the top of the segment 3 along two slide rails 9 by moving the hinge head 7, and then the hinge head 7 moves along the slide groove at the bottom of the top beam 4, so that the position of the adsorption mechanism 8 at the bottom is adjusted to the anti-seepage test area determined above the segment 3, at this time, by adjusting the length of the supporting connecting rod 5, the suction cup assembly 30 under the adsorption mechanism 8 is closely attached to the outer arc surface of the segment 3, the adsorption mechanism 8 is connected to the external negative pressure device, and then the negative pressure device is started to form a negative pressure in the adsorption mechanism 8, so that the adsorption mechanism 8 is adsorbed and fixed on the outer arc surface of the segment 3, and then the anti-seepage test of the segment 3 is carried out.

[0046] The anti-seepage test bench 1 mainly provides a platform for placing the pipe segment 3, while the top beam 4 and the supporting connecting rod 5 can provide a certain supporting force for the adsorption mechanism 8 to prevent the entire adsorption mechanism 8 from being washed away by water pressure during the anti-seepage test. It is worth noting that the supporting connecting rod 5 can rotate around the hinge joint 7 to ensure that the adsorption mechanism 8 and the outer arc surface of the pipe segment 3 can be as close as possible.

[0047] The present invention has simple operation steps and only needs to be operated on one side of the pipe segment 3. The setting of the adsorption mechanism 8 and the cooperation of the external negative pressure device can fix the adsorption mechanism 8 by means of vacuum negative pressure, so as to fix the adsorption mechanism 8 on the pipe segment 3. Compared with the clamping method using a transverse pressure member and a fastening screw in the prior art, in the prior art, during the installation process, a transverse pressure member with a larger deadweight is set on the inner arc surface, and connected to the supine rigid test piece support seat on the outer arc surface by a fastening screw, which may cause uneven force on the pipe segment 3 and cause cracks. At the same time, using this method to perform anti-seepage detection on the pipe segment 3 consumes a lot of labor and working hours, and the detection efficiency is low. During the installation process, the anti-seepage test bench 1 is selected to support the pipe segment 3, and the adsorption mechanism 8 is set above the pipe segment 3. The negative pressure device is connected to the adsorption mechanism 8, and the adsorption mechanism 8 is fixed above the pipe segment 3 by means of vacuum negative pressure, which shortens the time required for disassembly and assembly of the device, thereby greatly shortening the time required for inspecting the pipe segment 3 and improving the inspection efficiency. It is particularly suitable for the inspection of a large number of pipe segments 3. The cooperation of the supporting connecting rod 5 and the top beam 4 makes it easy to move and adjust the adsorption mechanism 8, which has high construction efficiency, saves labor, and reduces safety risks. In addition, the adsorption mechanism 8 can flexibly select a fixed point, has strong adaptability, and improves the convenience of the test.

[0048] Specifically, the rigid support 20 includes an outer ring frame beam 21 and an inner support beam 22, wherein the inner support beam 22 is located inside the outer ring frame beam 21 and is welded to the outer ring frame beam 21. By adjusting the fastener 50, the rubber strip 33 is closely attached to the outer arc surface of the tube segment 3, and the pressing plate 40 is pressed down to squeeze the suction cup assembly 30, so that the bottom of the suction cup assembly 30 is closely attached to the rubber plate 34. It is worth noting that since a flexible suction cup group is also provided at the bottom of the rigid support 20, the shape of the rigid support 20 can be kept as consistent as possible with the outer arc surface of the tube segment 3.

[0049] The suction cup assembly 30 includes multiple suction cup bases, multiple rubber strips 33 and a rubber plate 34. All suction cup bases are evenly arranged along the bottom of the outer ring frame. All rubber strips 33 are arranged between two adjacent suction cup bases and are fixedly connected to the suction cup bases. The rubber plate 34 is located in a space enclosed by the multiple rubber strips 33 and the multiple suction cup bases, and all rubber strips 33 and all suction cup bases are fixedly connected to the rubber plate 34. The rubber plate 34, all rubber plates 34 and all suction cup bases enclose a cavity 38, in which a water inlet pipe 35 is inserted into one of the rubber strips 33, and the water inlet pipe 35 extends into the cavity 38 after passing through the rubber strip 33. A water outlet pipe 36 is inserted into the rubber plate 34, and the water outlet pipe 36 extends into the cavity 38 after passing through the rubber plate 34.

[0050] The suction cup base includes a suction cup steel seat 31 and a rubber sleeve 32. The upper part of the suction cup steel seat 31 is a hollow conduit 39. The outer side of the top of the hollow conduit 39 is provided with an external thread. The outer side of the top of the hollow conduit 39 is threadedly connected with a nut 42 through the external thread. The lower part of the suction cup steel seat 31 is a truncated cone base, and a negative pressure chamber 37 is provided in the middle of the suction cup steel seat 31. The negative pressure chamber 37 is a hollow structure. The rubber sleeve 32 is sleeved on the outer side of the bottom end of the suction cup steel seat 31. The outer walls of the rubber sleeve 32 are fixedly connected to the rubber strip 33 and the rubber plate 34 respectively, and the bottom of the rubber sleeve 32 is flush with the bottom of the rubber plate 34.

[0051] Before conducting the anti-seepage test, by adjusting the fastener 50, all rubber sleeves 32 and all rubber strips 33 are tightly attached to the upper part of the pipe segment 3, and then the external negative pressure device is connected to the hollow conduit 39, and the negative pressure device is started. The negative pressure device draws out the air in the negative pressure chamber 37 through the hollow conduit 39 of the suction cup steel seat 31, so that negative pressure is formed in the negative pressure chamber 37, so that the bottom of the suction cup steel seat 31 is fixed on the outer arc surface of the pipe segment 3. The arrangement of multiple suction cup bases can make the suction cup assembly 30 firmly fixed on the upper part of the pipe segment 3. When the suction cup assembly 30 needs to be removed, it is only necessary to close the negative pressure device to allow air to enter the negative pressure chamber 37. In this way, it is more convenient to adjust the position of the adsorption mechanism 8, and the leakage test area can be adjusted by adjusting the negative pressure state.

[0052] When conducting the anti-seepage test, open the water inlet pipe 35, close the water outlet pipe 36, and use the water injection pressure equipment to inject water into the cavity 38 through the water inlet pipe 35; when the water pressure reaches a certain level, if the joints are not tightly fitted or the joint water-stopping structure fails, water will seep downward through the joints between the segments 3. By observing whether there are water stains or dripping on the lower part of the segment 3, it can be judged according to relevant specifications whether the water seepage at the joints of the segment 3 meets the requirements.

[0053] Through the cooperation of the suction cup assembly 30 and the fastener 50, all rubber strips 33 and all rubber sleeves 32 can be adjusted to fit tightly with the outer arc surface of the pipe segment 3 before conducting the anti-seepage test, thereby improving the sealing effect inside the cavity 38 and avoiding the problem of liquid seeping out of the joint between the pipe segment 3 and the rubber strip 33 due to excessive water pressure in the cavity 38. The close fitting effect between the suction cup assembly 30 and the pipe segment 3 can also be accurately regulated at multiple points, reducing the number of test rework times and effectively improving the test efficiency.

[0054] The rubber sleeve 32 can improve the fit between the suction cup steel seat 31 and the outer arc surface of the pipe segment 3. The rubber sleeve 32, the rubber strip 33 and the rubber plate 34 can be connected on site by welding, or can be customized by a mold.

[0055] Specifically, a plurality of reserved holes 23 are provided on the outer ring frame beam 21 and the inner support beam 22, and an internal thread for bolting with the top bolt 51 is provided on the upper inner side of all the reserved holes 23, and a flange for preventing the bottom bolt 52 from falling out is provided on the lower inner side of all the reserved holes 23, and through holes 25 for the hollow conduit 39 on the upper part of the suction cup steel seat 31 to pass through are provided on the four corners of the outer ring frame beam 21.

[0056] The fastener 50 includes a top bolt 51, a bottom bolt 52 and a wedge-shaped pressure head 53. The top bolt 51 is threadedly connected to the reserved hole 23, and the top of the bottom bolt 52 is threadedly connected to the top bolt 51. Short screws 41 are fixedly provided on the upper part of the wedge-shaped pressure head 53 and the top of the pressure plate 40, and all short screws 41 are located directly below the inner support beam 22. A threaded cavity with a thread is opened at the bottom of the bottom bolt 52, and the tops of all short screws 41 are threadedly connected to the threaded cavity at the bottom of the bottom bolt 52.

[0057] The wedge-shaped pressing heads 53 of all the fasteners 50 are evenly arranged below the outer ring frame beam 21 , and the lower parts of all the wedge-shaped pressing heads 53 abut against the top of the rubber strip 33 .

[0058] When adjusting the suction cup assembly 30, after the top bolt 51 is screwed into the reserved hole 23, the bottom bolt 52 can be pushed downward, thereby pushing the wedge-shaped pressure head 53 to press the rubber strip 33 tightly, and press the rubber strip 33 to be in close contact with the pipe segment 3; the pressure plate 40 is arranged between the rigid bracket 20 and the suction cup assembly 30, and the pressure plate 40 is a rigid steel plate. The pressure plate 40 and the upper part of all the inner support beams 22 are provided with short screws 41, and the short screws 41 can be connected with the bottom bolts 52 on the inner support beams 22. By screwing in the top bolt 51, the bottom bolt 52 is pushed downward so that the pressure plate 40 and the rubber plate 34 can be pressed tightly;

[0059] The setting of the pressure plate 40 is mainly to prevent the rubber plate 34 from being greatly deformed under high water pressure during the anti-seepage test, thereby affecting the test; by setting the wedge-shaped pressure head 53, the suction cup assembly 30 can be better fitted to the outer arc surface of the pipe segment 3. Even if the rigid support 20 or the outer arc surface of the pipe segment 3 is different in shape from the suction cup assembly 30, considering that the suction cup assembly 30 is a flexible component, the screwing depth of the top bolt 51 can be adjusted so that the rubber strip 33 is closely fitted to the outer arc surface of the pipe segment 3 under the push of the wedge-shaped pressure head 53, so that the close fitting effect of the adsorption assembly is flexible and controllable, and the overall test is more convenient, faster and more applicable than the prior art; in addition, since there is a flexible suction cup assembly 30 at the bottom of the rigid support 20, the processing accuracy requirements for the rigid support 20 in the actual construction process are relatively low, and it is sufficient to keep it basically consistent with the shape of the outer arc surface of the pipe segment 3.

[0060] The present invention can further adjust the height of the pressure plate 40 and the rubber strip 33 by setting the fastener 50, so that the rubber strip 33 can be adjusted to fit tightly with the outer arc surface of the tube segment 3, and the pressure plate 40 can be adjusted to fit tightly with the suction cup assembly 30, thereby improving the airtightness in the cavity 38 and improving the adsorption effect of the adsorption mechanism 8.

[0061] Furthermore, if Fig.10 As shown, in the present invention, the adsorption mechanism 8 which is easy to be processed into various shapes can meet the requirements of the anti-seepage test of various types of structures and has strong practicality.

[0062] A test method for an adsorption-type tunnel segment 3 anti-seepage test device comprises the following steps:

[0063] S1, two support pedestals 2, a top beam 4 and two bottom beams 6 are made into an anti-seepage test bench 1, and a plurality of pipe segments 3 are sequentially spliced ​​and placed on the bottom beams 6 of the anti-seepage test bench 1;

[0064] S2, after fixing the adsorption mechanism 8 at the bottom of the supporting connecting rod 5, the adsorption mechanism 8 is moved to the anti-seepage test area determined on the upper part of the pipe segment 3 by moving the top beam 4 and the connecting rod, and the adsorption mechanism 8 is lowered until the suction cup assembly 30 is in close contact with the outer curved surface of the pipe segment 3 by adjusting the length of the supporting connecting rod 5;

[0065] S3, connecting the adsorption mechanism 8 to an external negative pressure device, and then starting the negative pressure device to form a negative pressure inside the adsorption mechanism 8, so that the adsorption mechanism 8 is fixed on the outer arc surface of the tube segment 3;

[0066] S4, adjusting the fastener 50, adjusting the rubber strip 33 to fit tightly with the outer curved surface of the tube segment 3;

[0067] S5, adjusting the fastener 50, adjusting the pressing plate 40 to fit tightly with the suction cup assembly 30;

[0068] S6, open the water inlet pipe 35 and the water outlet pipe 36, and inject water into the suction cup assembly 30 through the water inlet pipe 35 by means of a water injection pressure device, until the water enters the upper part of the outer arc surface of the pipe segment 3 to perform an anti-seepage test, and close the water outlet when water overflows from the water outlet pipe 36;

[0069] S7, using the water inlet pipe 35 to load the test water pressure, when the water pressure reaches a certain level, by observing whether there is water stain or dripping at the bottom of the pipe segment 3, it can be judged according to relevant specifications whether the water seepage of the joint of the pipe segment 3 meets the requirements;

[0070] S8. After the observation is completed, the water in the cavity 38 of the suction cup assembly 30 is drained, and then the negative pressure loading device is closed, the adsorption mechanism 8 is removed, and the water seepage depth of the concrete of the pipe segment 3 is detected to complete the entire anti-seepage test.

[0071] The protection scope of the application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the application within the essence and protection scope of the application, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the application.

Claims

1. An adsorption-type tunnel segment anti-seepage test device, comprising an anti-seepage test bench (1), characterized in that: The anti-seepage test bench (1) comprises two support pedestals (2), a top beam (4) and two bottom beams (6), the two support pedestals (2) are symmetrically arranged on the foundation, the top beam (4) is located between the two support pedestals (2), the two bottom beams (6) are symmetrically arranged between the two support pedestals (2), and both ends of the two bottom beams (6) are respectively fixedly connected to the two support pedestals (2), the bottom beam (6) is used to place the pipe segment (3), the pipe segment (3) is located below the top beam (4), and the bottom of the top beam (4) is provided with a hinge joint (7), and the bottom of the hinge joint (7) is rotatably connected to a retractable support link A rod (5), wherein the bottom of the supporting connecting rod (5) is connected to an adsorption mechanism (8) for adsorbing and fixing the pipe segment (3), the adsorption mechanism (8) comprising a rigid support (20), a suction cup assembly (30) and a pressing plate (40), the suction cup assembly (30) being located below the rigid support (20), the pressing plate (40) being located inside the suction cup assembly (30), the rigid support (20) and the suction cup assembly (30) being connected via a fastener (50), a connecting support (24) being fixedly connected at a middle position of the top of the rigid support (20), and the top of the connecting support (24) being detachably connected to the supporting connecting rod (5); The rigid support (20) comprises an outer ring frame beam (21) and an inner support beam (22), wherein the inner support beam (22) is located inside the outer ring frame beam (21) and is welded to the outer ring frame beam (21); The suction cup assembly (30) comprises a plurality of suction cup bases, a plurality of rubber strips (33) and a rubber plate (34); all the suction cup bases are evenly arranged along the bottom of the outer ring frame beam (21); all the rubber strips (33) are arranged between two adjacent suction cup bases and are fixedly connected to the suction cup bases; the rubber plate (34) is located in a space enclosed by the plurality of rubber strips (33) and the plurality of suction cup bases; all the rubber strips (33) and all the suction cup bases are fixedly connected to the outer wall of the rubber plate (34); the rubber plate (34), all the rubber strips (33) and all the suction cup bases enclose a cavity (38); a water inlet pipe (35) is inserted into one of the rubber strips (33); the water inlet pipe (35) penetrates the rubber strip (33) and then extends into the cavity (38); a water outlet pipe (36) is inserted into the rubber plate (34); the water outlet pipe (36) penetrates the rubber plate (34) and then extends into the cavity (38); The suction cup base comprises a suction cup steel base (31) and a rubber sleeve (32); the upper portion of the suction cup steel base (31) is a hollow conduit (39); the outer side of the top of the hollow conduit (39) is provided with an external thread; the outer side of the top of the hollow conduit (39) is threadedly connected to a nut (42) via the external thread; the lower portion of the suction cup steel base (31) is a truncated cone-shaped base; the middle portion of the suction cup steel base (31) is provided with a negative pressure chamber (37); the negative pressure chamber (37) is a hollow structure; the rubber sleeve (32) is sleeved on the outer side of the bottom end of the suction cup steel base (31); the outer wall of the rubber sleeve (32) is fixedly connected to the rubber strip (33) and the rubber plate (34), respectively; and the bottom of the rubber sleeve (32) is flush with the bottom of the rubber plate (34).

2. The adsorption type tunnel segment anti-seepage test device according to claim 1, characterized in that: The outer ring frame beam (21) and the inner support beam (22) are both provided with a plurality of reserved holes (23), the upper inner sides of all the reserved holes (23) are provided with internal threads, the inner sides of all the reserved holes (23) are threadedly connected with bottom bolts (52), the lower inner sides of all the reserved holes (23) are provided with flanges for preventing the bottom bolts (52) from falling out, and the outer ring frame beam (21) is provided with through holes (25) at the four corners thereof for the hollow conduit (39) at the upper part of the suction cup steel seat (31) to pass through.

3. The adsorption type tunnel segment anti-seepage test device according to claim 2, characterized in that: The fastener (50) comprises a top bolt (51) and a wedge-shaped pressure head (53), wherein the top bolt (51) is threadedly connected to the reserved hole (23), the upper part of the wedge-shaped pressure head (53) and the top of the pressure plate (40) are fixedly provided with short screws (41), and all the short screws (41) are located directly below the inner support beam (22), and a threaded cavity with a thread is formed at the bottom of the bottom bolt (52), and the tops of all the short screws (41) are threadedly connected to the threaded cavity at the bottom of the bottom bolt (52).

4. The adsorption type tunnel segment anti-seepage test device according to claim 2, characterized in that: The wedge-shaped pressing heads (53) of all the fasteners (50) are evenly arranged below the outer ring frame beam (21), and the lower parts of all the wedge-shaped pressing heads (53) abut against the top of the rubber strip (33).

5. The adsorption type tunnel segment anti-seepage test device according to claim 1, characterized in that: A slide groove is provided at the bottom of the top beam (4), the hinge joint (7) is slidably connected to the slide groove, and slide rails (9) are provided on opposite sides of the tops of the two support pedestals (2), and the two ends of the top beam (4) are slidably connected to the two slide rails (9) respectively.

6. A test method for the adsorption-type tunnel segment anti-seepage test device according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1. Two support pedestals (2), a top beam (4) and two bottom beams (6) are manufactured into an anti-seepage test bench (1), and a plurality of pipe segments (3) are sequentially spliced ​​and placed on the bottom beam (6) of the anti-seepage test bench (1); S2, after fixing the adsorption mechanism (8) at the bottom of the supporting connecting rod (5), the adsorption mechanism (8) is moved to the anti-seepage test area determined on the upper part of the pipe segment (3) by moving the top beam (4) and the connecting rod, and the adsorption mechanism (8) is lowered until the suction cup assembly (30) is in close contact with the outer arc surface of the pipe segment (3) by adjusting the length of the supporting connecting rod (5); S3, connecting the adsorption mechanism (8) to an external negative pressure device, and then starting the negative pressure device to form a negative pressure in the adsorption mechanism (8), thereby fixing the adsorption mechanism (8) on the outer curved surface of the pipe segment (3); S4, adjusting the fastener (50) to adjust the rubber strip (33) to fit tightly against the outer curved surface of the pipe segment (3); S5, adjusting the fastener (50) to adjust the pressing plate (40) to fit tightly with the suction cup assembly (30); S6, opening the water inlet pipe (35) and the water outlet pipe (36), and injecting water into the suction cup assembly (30) through the water inlet pipe (35) by means of a water injection pressure device until the water enters the upper part of the outer arc surface of the pipe segment (3) to perform an anti-seepage test, and closing the water outlet when water overflows from the water outlet pipe (36); S7, using the water inlet pipe (35) to load the test water pressure, when the water pressure reaches a certain level, by observing whether there are water stains or water dripping on the lower part of the pipe segment (3), it can be judged according to relevant specifications whether the water seepage of the joint of the pipe segment (3) meets the requirements; S8. After the observation is completed, the water in the cavity (38) of the suction cup assembly (30) is drained, and then the negative pressure loading device is closed, the adsorption mechanism (8) is removed, and the water seepage depth of the concrete of the pipe segment (3) is detected to complete the entire anti-seepage test.

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