Concrete surface seepage disease sealing treatment test simulation device

Abstract

The utility model relates to the technical field of concrete experiment simulation, in particular to a concrete surface seepage disease sealing treatment test simulation device which comprises an external water pressure conveying system, a micropore concrete pressure bearing system and an overflow water recycling system. The external water pressing system is composed of a water storage tank, a water pressing hose, a pressure gauge, a booster pump, a pressure controller and a pressure stabilizing water tank, the micropore concrete pressure bearing system is composed of a concrete test piece, a fixing clamp, a sealing layer and a locking bolt, and the overflow water recycling system is composed of an overflow water collecting bin, a water return pipe and the water storage tank; the booster pump and the pressure gauge are electrically and interactively connected with the pressure controller through wires. The improved test simulation device can simulate working conditions such as specific water pressure, specific flow, specific pore number and size and the like, can be used as an important equipment basis for a concrete surface seepage disease sealing treatment test, is provided with a complete water seepage-recycling circulation path, and can save test water and reduce operation difficulty.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete experiment simulation, in particular to a test simulation device for closed treatment of concrete surface seepage diseases. Background Technique

[0002] As the saying goes, "no tunnel is leak - free", and water seepage problems are common in underground projects. Affected by the overly abundant water resources, the water seepage problems faced by hydraulic structures are even more severe. Some people even assert that "no hydraulic structure can avoid water seepage problems". Concrete water seepage is mainly divided into three categories according to the channel distribution: point seepage, line seepage, and surface seepage. Surface seepage is generally caused by local non - compaction of concrete. It is difficult to find a clear leakage point. The seepage water scurries around inside the concrete, making it difficult to repair. In previous research and practice, it was considered that surface seepage diseases should be treated by grouting. Since there are no obvious cracks, vertical holes are usually drilled for grouting. Although large seepage can be treated, the wet stains often cannot be completely repaired. In recent years, the technical repair idea has gradually changed, and surface sealing treatment with fast - hardening cement - based materials, polymer materials, epoxy materials, polyurea materials, etc. has become the mainstream repair method.

[0003] At present, due to the limitation of test devices, the experimental research on concrete surface sealing treatment materials and processes generally involves scraping or spraying sealing materials on the surface of concrete specimens, and then using the soaking method for freeze - resistance, impermeability and other tests. It can only simulate the internal water - external pressure working condition, which does not conform to the external water - internal seepage problem that is most worried about in thin - layer repair. There is a lack of a special external water - internal seepage test device, and the pre - control of the comparison study of surface sealing materials and treatment processes is lacking. Content of the Utility Model

[0004] The purpose of the utility model is to provide a test simulation device for closed treatment of concrete surface seepage diseases to solve the problems raised in the above - mentioned background technique. To achieve the above purpose, the utility model provides the following technical solution: A test simulation device for closed treatment of concrete surface seepage diseases includes an external water pressure delivery system, a microporous concrete pressure - bearing system, and an overflow water recovery system;

[0005] The external water pressure delivery system consists of a water storage tank, a water pressure hose, a pressure gauge, a booster pump, a pressure controller, and a pressure - stabilizing water tank. A drain port is opened on one side of the water storage tank. An inlet and a return port are respectively arranged on the top of the water storage tank. There are two return ports, which are respectively located on both sides of the inlet. The middle part of the water storage tank is connected to the inlet of the booster pump through a water pressure hose, and a pressure gauge is arranged in the middle of the water pressure hose. The outlet of the booster pump is connected to the bottom end of the microporous concrete pressure - bearing system through a water pressure hose;

[0006] Both the booster pump and the pressure gauge are electrically interactively connected to the pressure controller through wires;

[0007] A support platform is provided at the bottom of the water storage tank. Support vertical rods are vertically provided on both sides of the support platform. A pressure stabilizing water tank top plate is provided at the top of the support vertical rods. A pressure stabilizing water tank is fixedly connected to the bottom surface of the pressure stabilizing water tank top plate. The pressure stabilizing water tank top plate is respectively provided with water permeable holes and locking bolt holes, and the locking bolt holes are evenly distributed around the water permeable holes at equal angles;

[0008] The microporous concrete pressure-bearing system is composed of a concrete specimen, a fixing fixture, a sealing layer and a locking bolt. The bottom of the concrete specimen is attached to the pressure stabilizing water tank top plate through the locking bolt. A fixing fixture is provided outside the concrete specimen. A sealing layer is attached between the fixing fixture and the concrete specimen. A sealing ring groove is further provided at the top edge of the fixing fixture. A number of micropores are vertically provided inside the concrete specimen;

[0009] The overflow water recovery system is composed of an overflow water collection bin, a return water pipe and a water storage tank. The overflow water collection bin is located outside the fixing fixture. The bottom end of the overflow water collection bin is communicated with one end of the return water pipe. The other end of the return water pipe is inserted into the water return port at the top of the water storage tank.

[0010] Further preferably, the volume of the water storage tank ≥ 200L, the volume of the pressure stabilizing water tank ≥ 50L, the volume of the pressure stabilizing water tank is 1 / 4 - 1 / 3 of the volume of the water storage tank, and the side plates of the water storage tank and the pressure stabilizing water tank are all made of steel materials with a thickness ≥ 2mm;

[0011] The material of the pressure water hose is one of polytetrafluoroethylene and polyvinyl chloride; the diameter of the pressure water hose ≥ 25mm;

[0012] The pressure gauge and the pressure controller are integrated;

[0013] The water permeable holes are concentrated in a circular area, and the diameter of the water permeable holes is 5mm - 15mm.

[0014] Further preferably, the concrete specimen is a frustum of a cone, with through micropores inside. The number of micropores is not less than 5, and the diameter of the micropores is not more than 1mm;

[0015] The sealing layer is a mixture of paraffin and rosin.

[0016] Further preferably, the bottom diameter of the frustum specimen is 1.02 - 1.05 times the top diameter, and the height of the specimen ≥ 200mm; the bottom diameter of the specimen does not exceed 95% of the equivalent diameter of the circular area where the water permeable holes of the pressure stabilizing water tank top plate are distributed.

[0017] Further preferably, the upper opening cross-section of the overflow water collection bin is in a circular ring shape, circumferentially surrounding the overflow surface at the top of the concrete specimen. The opening height of the overflow water collection bin is flush with the upper surface of the fixing fixture, the top opening size ≥ 50mm, and the height of the overflow water collection bin is not less than 100mm;

[0018] The material of the return pipe is one of polytetrafluoroethylene and polyvinyl chloride, and the diameter of the return pipe is ≥12 mm.

[0019] Further preferably, there are 4 support vertical rods in total. The material used for the support vertical rods is stainless steel pipe, with a height of 1.0 m to 1.3 m and a diameter of ≥28 mm.

[0020] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0021] The present utility model can conduct pre - evaluation on the materials and processes for sealing treatment of concrete surface seepage diseases. The technical effectiveness of surface seepage disease sealing treatment mainly faces the harsh condition of external water infiltrating into the interior. However, the existing test methods mainly use the soaking method for inspection, which is equivalent to internal water seeping outwards and does not conform to the actual harsh working conditions. Therefore, the inapplicability of a certain material can only be found after the event, and the pre - evaluation is insufficient.

[0022] The present utility model can simulate the actual situation of sealing treatment of concrete surface seepage diseases in engineering. The simulation results of the sealing treatment materials and processes can directly guide engineering practice. The present utility model can simulate the working conditions of surface seepage diseases such as seepage pressure (water head), seepage flow rate (groundwater reserve), and seepage channels (defect size and quantity), and the test results of the sealing treatment conform to the engineering reality.

[0023] The present utility model has the ability to finely adjust seepage pressure, seepage flow rate, seepage channels, etc. As an indoor test simulation device, it can finely investigate the influence of seepage pressure, seepage flow rate, seepage channels, etc., and compare the effectiveness of seepage repair at different time periods after the sealing treatment of surface seepage diseases. It can be used as an important equipment basis for scientific research and is even expected to become an equipment basis for standardized inspection. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the internal structure of the front view of the present utility model;

[0025] Figure 2 It is a schematic diagram of the front view structure of the present utility model;

[0026] Figure 3 It is a schematic diagram of the top - view structure of the roof of the constant - pressure water tank of the present utility model.

[0027] In the figure: 1. Water storage tank; 2. Water return port; 3. Drain port; 4. Water return pipe; 5. Pressurized water hose; 6. Pressure gauge; 7. Booster pump; 8. Pressure controller; 9. Support vertical rod; 10. Pressure stabilizing water tank; 11. Water permeable holes; 12. Pressure stabilizing water tank top plate; 13. Locking bolt; 14. Sealing ring slot; 15. Overflow water collection bin; 16. Fixed fixture; 17. Concrete specimen; 18. Sealing layer; 19. Micro pores; 20. Water inlet; 21. Support platform; 22. Ground; 23. Locking bolt hole. Specific implementation manner

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0029] Please refer to Figures 1 to 3 , the present invention provides a technical solution: a test simulation device for sealing treatment of concrete surface seepage diseases, including an external water pressure delivery system, a micro-porous concrete pressure-bearing system, and an overflow water recovery system;

[0030] The external water pressure delivery system is composed of a water storage tank 1, a pressurized water hose 5, a pressure gauge 6, a booster pump 7, a pressure controller 8, and a pressure stabilizing water tank 10. A drain port 3 is opened on one side of the water storage tank 1. The top of the water storage tank 1 is respectively provided with a water inlet 20 and a water return port 2. There are two water return ports 2, which are respectively located on both sides of the water inlet 20. The middle part of the water storage tank 1 is connected to the water inlet of the booster pump 7 through the pressurized water hose 5, and a pressure gauge 6 is provided in the middle of the pressurized water hose 5. The water outlet of the booster pump 7 is connected to the bottom end of the micro-porous concrete pressure-bearing system through the pressurized water hose 5;

[0031] Both the booster pump 7 and the pressure gauge 6 are electrically interconnected with the pressure controller 8 through wires;

[0032] The bottom of the water storage tank 1 is provided with a support platform 21. Support vertical rods 9 are vertically arranged on both sides of the support platform 21. The top of the support vertical rod 9 is provided with a pressure stabilizing water tank top plate 12. The bottom surface of the pressure stabilizing water tank top plate 12 is fixedly connected with a pressure stabilizing water tank 10. The pressure stabilizing water tank top plate 12 is respectively provided with water permeable holes 11 and locking bolt holes 23, and the locking bolt holes 23 are evenly distributed at equal angles around the water permeable holes 11;

[0033] The microporous concrete pressure-bearing system consists of a concrete specimen 17, a fixing fixture 16, a sealing layer 18, and a locking bolt 13. The bottom of the concrete specimen 17 is attached to the top plate 12 of the pressure stabilizing water tank through the locking bolt 13. The outside of the concrete specimen 17 is provided with a fixing fixture 16, and a sealing layer 18 is attached between the fixing fixture 16 and the concrete specimen 17. A sealing ring slot 14 is also provided at the top edge of the fixing fixture 16. A number of micropores 19 are vertically arranged inside the concrete specimen 17;

[0034] The overflow water recovery system consists of an overflow water collection bin 15, a return water pipe 4, and a water storage tank 1. The overflow water collection bin 15 is located outside the fixing fixture 16. The bottom end of the overflow water collection bin 15 is communicated with one end of the return water pipe 4, and the other end of the return water pipe 4 is inserted into the water return port 2 at the top of the water storage tank 1.

[0035] In this embodiment, as Figure 1 shown, the volume of the water storage tank 1 ≥ 200L, the volume of the pressure stabilizing water tank 10 ≥ 50L, the volume of the pressure stabilizing water tank 10 is 1 / 4 to 1 / 3 of the volume of the water storage tank 1. The side plates of the water storage tank 1 and the pressure stabilizing water tank 10 are all made of steel materials, and their thickness ≥ 2mm;

[0036] The material of the water pressure hose 5 is one of polytetrafluoroethylene and polyvinyl chloride; the diameter of the water pressure hose 5 ≥ 25mm;

[0037] The pressure gauge 6 and the pressure controller 8 are integrated;

[0038] The water permeable holes 11 are concentrated in a circular area, and the diameter of the water permeable holes 11 is 5mm to 15mm.

[0039] In this embodiment, as Figure 1 shown, the concrete specimen 17 is a frustum of a cone, with penetrating micropores 19 inside. The number of micropores 19 is not less than 5, and the diameter of the micropores 19 is not more than 1mm;

[0040] The sealing layer 18 is a mixture of paraffin and rosin.

[0041] In this embodiment, as Figure 1 shown, the bottom diameter of the frustum specimen is 1.02 to 1.05 times the top diameter, and the height of the specimen ≥ 200mm; the bottom diameter of the specimen does not exceed 95% of the equivalent diameter of the circular area where the water permeable holes 11 are distributed on the top plate of the pressure stabilizing water tank 10.

[0042] In this embodiment, as Figure 1 shown, the upper opening section of the overflow water collection bin 15 is in a circular ring shape, circumferentially surrounding the overflow surface at the top of the concrete specimen 17. The opening height of the overflow water collection bin 15 is flush with the upper surface of the fixing fixture 16, the top opening size ≥ 50mm, and the height of the overflow water collection bin 15 is not less than 100mm;

[0043] The material of the return water pipe 4 is one of polytetrafluoroethylene and polyvinyl chloride, and the diameter of the return water pipe 4 is ≥ 12 mm.

[0044] In this embodiment, as Figure 1 shown, there are 4 support vertical rods 9 in total. The material used for the support vertical rods 9 is stainless steel pipe, with a height of 1.0 m to 1.3 m and a diameter of ≥ 28 mm.

[0045] The usage method and advantages of the present utility model: When using the test simulation device for sealing treatment of concrete surface seepage diseases, the working process is as follows:

[0046] As Figure 1 , Figure 2 and Figure 3 shown, first prepare the reserved microporous or non-compact concrete specimens, and seal the gap between the concrete specimens and the fixed fixture with a sealing material with reference to the "Test Code for Hydraulic Concrete" (DL / T 5150-2017);

[0047] Determine technical parameters such as seepage pressure and seepage flow rate in advance. Place the concrete specimens together with the fixed fixture on the top plate of the constant pressure water tank 10, align the bottom surface of the conical body of the concrete specimens with the center of the circular distribution area of the water permeable holes 11 of the constant pressure water tank 10. First place the sealing ring, and then tighten it diagonally through the locking bolts 13; According to the seepage pressure and seepage flow rate targets, determine the diameter of the water pressure hose 5, and connect the water storage tank 1, the water pressure hose 5, the booster pump 7, the pressure gauge 6, the pressure controller 8, the constant pressure water tank 10, the concrete specimens 17, etc.;

[0048] Formulate a test plan for the sealing treatment of concrete surface seepage diseases, determine the surface sealing treatment materials and processes, as well as the surface sealing effect observation time; After the equipment is connected, first set the seepage pressure, start the pressure controller 8 and the pressure gauge 6, and turn on the booster pump 7; Then, water flows out from the water storage tank 1, reaches the microporous concrete pressure-bearing system through the external water pressure system, and the pressure water seeps out from the micropores 19 and overflows on the concrete surface. Wait until the pressure water flow state is stable or stop the water pressure and air-dry the surface of the specimens, and then conduct the surface seepage disease sealing treatment test. After the surface sealing treatment is completed, regularly observe according to the expected observation time to evaluate the seepage repair effect of the sealing treatment materials and processes.

[0049] The above shows and describes the basic principles, main features and advantages of the present utility model. Technical staff in this industry should understand that the present utility model is not limited by the above embodiments. The above embodiments and descriptions in the specification are only preferred examples of the present utility model and are not used to limit the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A simulation device for testing the sealing treatment of concrete surface seepage damage, characterized in that: It includes external water pressure delivery system, microporous concrete pressure bearing system and overflow water recovery system; The external water pressure delivery system is composed of a water storage tank (1), a water pressure hose (5), a pressure gauge (6), a booster pump (7), a pressure controller (8) and a pressure-stabilizing water tank (10). A drain port (3) is provided on one side of the water storage tank (1). A water inlet (20) and a water return port (2) are provided on the top of the water storage tank (1). Two water return ports (2) are provided, which are respectively located on both sides of the water inlet (20). The middle of the water storage tank (1) is connected to the water inlet of the booster pump (7) through a water pressure hose (5), and a pressure gauge (6) is provided in the middle of the water pressure hose (5). The water outlet of the booster pump (7) is connected to the bottom end of the microporous concrete pressure-bearing system through the water pressure hose (5). The booster pump (7) and the pressure gauge (6) are both electrically interconnected with the pressure controller (8) via wires; The bottom of the water storage tank (1) is provided with a support platform (21), and support vertical rods (9) are vertically provided on both sides of the support platform (21). The top of the support vertical rod (9) is provided with a pressure-stabilizing water tank top plate (12), and the bottom surface of the pressure-stabilizing water tank top plate (12) is fixedly connected to the pressure-stabilizing water tank (10). The pressure-stabilizing water tank top plate (12) is respectively provided with water-permeable holes (11) and locking bolt holes (23), and the locking bolt holes (23) are evenly distributed around the water-permeable holes (11) at equal angles. The microporous concrete pressure bearing system is composed of a concrete specimen (17), a fixing fixture (16), a sealing layer (18) and a locking bolt (13); the bottom of the concrete specimen (17) is bonded to the top plate (12) of the supporting pressure water tank through the locking bolt (13); the outside of the concrete specimen (17) is provided with a fixing fixture (16); a sealing layer (18) is bonded between the fixing fixture (16) and the concrete specimen (17); the top edge of the fixing fixture (16) is also provided with a sealing ring groove (14); and a plurality of micropores (19) are vertically provided inside the concrete specimen (17); The overflow water recovery system is composed of an overflow water collection bin (15), a return water pipe (4) and a water storage tank (1); the overflow water collection bin (15) is located outside a fixing fixture (16); the bottom end of the overflow water collection bin (15) is connected to one end of the return water pipe (4); and the other end of the return water pipe (4) is plugged into a return water port (2) at the top of the water storage tank (1).

2. A concrete surface seepage disease sealing treatment test simulation device according to claim 1, characterized in that: The volume of the water storage tank (1) is ≥200L, the volume of the pressure-stabilizing water tank (10) is ≥50L, the volume of the pressure-stabilizing water tank (10) is 1 / 4 to 1 / 3 of the volume of the water storage tank (1), and the side plates of the water storage tank (1) and the pressure-stabilizing water tank (10) are both made of steel, with a thickness of ≥2mm; The material of the water pressure hose (5) is one of polytetrafluoroethylene and polyvinyl chloride; the diameter of the water pressure hose (5) is ≥25 mm; The pressure gauge (6) and the pressure controller (8) are integrated; The water permeable holes (11) are concentrated in a circular area, and the diameter of the water permeable holes (11) is 5 mm to 15 mm.

3. A concrete surface seepage disease sealing treatment test simulation device according to claim 1, characterized in that: The concrete test piece (17) is a truncated cone, and is provided with penetrating micropores (19) inside, the number of the micropores (19) is not less than 5, and the diameter of the micropores (19) is not greater than 1 mm; The sealing layer (18) is a mixture of paraffin and rosin.

4. A concrete surface seepage disease sealing treatment test simulation device according to claim 3, characterized in that: The bottom diameter of the truncated cone test piece is 1.02 to 1.05 times the top diameter, and the test piece height is ≥200 mm; the bottom diameter of the test piece does not exceed 95% of the equivalent diameter of the circular area of ​​the water permeable holes (11) on the top plate of the pressure-stabilizing water tank (10).

5. The concrete surface seepage disease sealing treatment test simulation device according to claim 1 is characterized in that: The cross-section of the upper opening of the overflow water collection bin (15) is in the shape of a circular ring, surrounding the overflow surface of the top of the concrete test piece (17) in an annular direction, the opening height of the overflow water collection bin (15) is flush with the upper surface of the fixing fixture (16), the top opening size is ≥50 mm, and the height of the overflow water collection bin (15) is not less than 100 mm; The material of the water return pipe (4) is one of polytetrafluoroethylene and polyvinyl chloride, and the diameter of the water return pipe (4) is ≥12 mm.

6. The concrete surface seepage disease sealing treatment test simulation device according to claim 1, characterized in that: There are 4 supporting vertical rods (9) in total, and the material used for the supporting vertical rods (9) is stainless steel pipe. Height 1.0m~1.3m, diameter ≥28mm.

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