A device for testing waterproof performance of tunnel construction materials

Abstract

The present invention relates to the technical field of construction material testing, and proposes a device for testing the waterproof performance of tunnel construction materials, comprising a freeze-thaw test chamber, a chassis, and a frame. A pressurized water injection system and a sealing slot mechanism are arranged side by side inside the frame. The pressurized water injection system comprises a jack and a water pressure system. The jack is used to detect the load-bearing strength of a material test block, and the water pressure system pressurizes water to detect the waterproof performance of the material test block under high load. The present invention integrates the pressure resistance, corrosion resistance, frost resistance, and waterproof testing of construction materials, and can simulate the overall state of construction materials in different tunnel environments to conduct waterproof testing, thereby adding construction materials according to different tunnel requirements to improve waterproof performance. At the same time, through the setting of the sealing slot mechanism, the contact surface between the material test block and the water pressure system can be sealed and waterproofed to prevent water from overflowing from the contact surface during water seepage detection.

Description

Technical Field

[0001] The invention relates to the technical field of construction material testing, in particular to a device for testing the waterproof performance of tunnel construction materials. Background Art

[0002] The performance of waterproofing materials in high-speed rail tunnel projects is a crucial prerequisite for waterproofing engineering design. Currently, due to the lack of engineering indicators for evaluating waterproofing material performance, evaluations are typically based on the waterproofing parameters of construction materials. These material properties are measured under a no-load, or stress-free, state. This makes it impossible to tailor waterproofing performance to the specific needs of individual tunnels and, therefore, to tailor the proportions of construction materials to those requirements. Therefore, a device for testing the waterproofing performance of tunnel construction materials is proposed to address this issue. Summary of the Invention

[0003] To achieve the above objectives, the present invention is implemented through the following technical solutions: a device for testing the waterproof performance of tunnel construction materials, comprising a freeze-thaw test chamber, a chassis, and a frame, wherein a pressurized water injection system and a sealing grooving mechanism are arranged side by side inside the frame, wherein the pressurized water injection system comprises a jack and a water pressure system, wherein the jack is used to detect the load-bearing strength of the material test block, and the water pressure system pressurizes water to detect the waterproof performance of the material test block under high load, wherein the sealing grooving mechanism comprises an annular grooving assembly and a grooved gluing assembly, wherein the annular grooving assembly is used to groove the surface of the material test block, and the grooved gluing assembly is used to apply sealant to the groove;

[0004] The surface of the freeze-thaw test chamber is provided with a switch cover, a transverse movement component is embedded between the switch cover and the frame, the slide of the transverse movement component and the surface of the switch cover are jointly provided with a guide rail located in the same plane, and the surface of the guide rail is slidably connected to a clamping tool for fixing a material test block;

[0005] A plurality of freeze-thaw molds are fixedly installed inside the freeze-thaw test box. A plurality of sealable openings matching the freeze-thaw molds are provided on the top of the switch cover. Each of the freeze-thaw molds is connected to a lifting cylinder for pushing the material test block out of the opening. An inlet and outlet liquid pipe group is connected between the plurality of freeze-thaw molds. The inlet and outlet liquid pipe group is connected to a liquid pump and a liquid outlet tank provided inside the chassis for injecting clean water or corrosive solution.

[0006] A movable liquid leakage detection mechanism is installed on one side of the freeze-thaw test box.

[0007] Preferably, a partition is provided inside the freeze-thaw test chamber, which divides the freeze-thaw test chamber into a driving chamber and a freeze-thaw chamber. Multiple freeze-thaw molds are installed inside the freeze-thaw chamber, and the outside of the freeze-thaw molds is filled with freeze-thaw liquid to achieve cyclic freeze-thaw. Multiple lifting cylinders are installed inside the driving chamber and are respectively located directly below the multiple freeze-thaw molds. A support plate is provided inside the freeze-thaw mold, and the top of the lifting cylinder is connected to the support plate to push the material test block up.

[0008] Preferably, a first box body and a movable frame are provided inside the frame, the water pressure system includes a liquid reservoir, a high-pressure pump, a pressure-stabilizing liquid storage tank inlet regulating valve and a rigid telescopic water pipe, the telescopic end of the jack is provided with a liquid outlet hole, and the rigid telescopic water pipe is connected to the liquid outlet hole.

[0009] Preferably, the movable frame includes a longitudinal slide and a vertical cylinder, a slide is provided on the surface of the longitudinal slide, the annular grooving assembly and the grooved gluing assembly are both installed on the surface of the movable frame, and the vertical cylinder is installed below the longitudinal slide.

[0010] Preferably, the annular grooving assembly comprises a driving motor and an annular grooving cutter head, and the grooves opened by the annular grooving cutter head can match the contact surface of the telescopic end of the jack.

[0011] Preferably, the slotting and gluing assembly includes an electric turntable, a gluing head is installed on the surface of the electric turntable, the shape of the gluing head matches the cross section of the slot, and the gluing head is connected to the gluing cylinder at the rear of the movable frame through a pipe.

[0012] Preferably, two positioning assemblies are fixed on the slide surface of the transverse movement assembly, and the positioning assemblies are used to position the clamping tooling.

[0013] Preferably, the clamping fixture includes two sliders slidably connected to the guide rail, and a door frame is commonly installed on the top of the two sliders. The top of the door frame is connected to a threaded adjustment rod, and the bottom of the threaded adjustment rod is rotatably connected to a pressure plate. Support plates are fixed to the two symmetrical side walls of the bottom end of the door frame, and the surfaces of the support plate and the pressure plate are provided with sockets, and a cylindrical positioning column is detachably inserted inside the socket.

[0014] Preferably, the liquid leakage detection mechanism includes a movable arm, and an infrared leak detector is fixed to one end of the movable arm.

[0015] The present invention provides a device for testing the waterproof performance of tunnel construction materials. It has the following beneficial effects:

[0016] The present invention integrates the pressure resistance, erosion resistance, frost resistance and waterproofing test of construction materials, and can simulate the overall state of construction materials in different tunnel environments to conduct waterproofing tests, so as to add construction materials according to different tunnel requirements to improve waterproofing performance. At the same time, through the setting of the sealing grooving mechanism, the contact surface between the material test block and the water pressure system can be sealed and waterproofed to avoid water overflowing from the contact surface during water seepage detection. In addition, the present invention can perform a three-point pressure test at the same time as the water seepage detection to test the waterproofing performance of the material test block under the action of high pressure. The detection is more comprehensive, which can provide a strong basis guarantee for subsequent tunnel construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a first-perspective overall stereoscopic diagram of a device for testing the waterproof performance of tunnel construction materials according to the present invention;

[0018] Figure 2 This is a second-view overall stereogram of a device for testing the waterproof performance of tunnel construction materials according to the present invention;

[0019] Figure 3 This is a diagram showing the internal structure of a freeze-thaw test chamber in a device for testing the waterproof performance of tunnel construction materials according to the present invention;

[0020] Figure 4 The present invention is a device for testing the waterproof performance of tunnel construction materials Figure 3 A partial schematic diagram of

[0021] Figure 5 This is a cross-sectional view of a clamping tool in a device for testing the waterproof performance of tunnel construction materials according to the present invention;

[0022] Figure 6 This is a diagram showing the clamping state of a clamping tool in a device for testing the waterproof performance of tunnel construction materials according to the present invention;

[0023] Figure 7 This is a partial perspective view of a pressurized water injection system in a device for testing the waterproof performance of tunnel construction materials according to the present invention;

[0024] Figure 8 The present invention is a tunnel construction material waterproof performance testing device Figure 6 Enlarged view of point A in the middle;

[0025] Figure 9 This is an enlarged view of the caulking head in a device for testing the waterproof performance of tunnel construction materials according to the present invention.

[0026] Among them, 1. Freeze-thaw test chamber; 11. Partition; 12. Support plate; 13. Freeze-thaw mold; 14. Inlet and outlet pipe group; 15. Lifting cylinder; 2. Chassis; 3. Rack; 31. First box; 32. Vertical cylinder; 33. Slide; 34. Longitudinal slide; 4. Switch cover; 41. Opening; 5. Guide rail; 6. Clamping tool; 61. Door frame; 62. Threaded adjustment rod; 63. Press plate; 64. Jack; 65. Support plate; 66. Cylindrical fixed Positioning column; 67. Slider; 7. Pressurized water injection system; 71. Jack; 72. Liquid outlet; 73. Rigid telescopic water pipe; 8. Sealing grooving mechanism; 81. Drive motor; 82. Annular grooving cutter head; 83. Electric turntable; 84. Gluing head; 9. Transverse movement assembly; 91. Positioning assembly; 911. Electromagnet telescopic rod; 912. Chuck; 913. Mounting bracket; 10. Liquid leakage detection mechanism; 101. Movable arm; 102. Infrared leak detector. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0028] Example 1:

[0029] like Figures 1-9As shown, an embodiment of the present invention provides a device for testing the waterproof performance of tunnel construction materials, including a freeze-thaw test chamber 1, a chassis 2 and a frame 3. A pressurized water injection system 7 and a sealing slotting mechanism 8 are arranged side by side inside the frame 3. The pressurized water injection system 7 includes a jack 71 and a water pressure system. The jack 71 is used to detect the load-bearing strength of the material test block. The water pressure system pressurizes water to detect the waterproof performance of the material test block under high load. The sealing slotting mechanism 8 includes an annular slotting component and a slotting glue coating component. The annular slotting component is used to make slots on the surface of the material test block, and the slotting glue coating component is used to apply sealant to the slots. The surface of the freeze-thaw test chamber 1 is provided with a switch cover 4, and the switch cover 4 and the frame 3 is embedded with a transverse movement component 9, and the sliding platform of the transverse movement component 9 and the surface of the switch cover 4 are jointly provided with a guide rail 5 located in the same plane, and the surface of the guide rail 5 is slidably connected to a clamping fixture 6 for fixing the material test block; a plurality of freeze-thaw molds 13 are fixedly installed inside the freeze-thaw test box 1, and a plurality of sealable openings 41 that match the freeze-thaw molds 13 are opened on the top of the switch cover 4. Each freeze-thaw mold 13 is connected to a lifting cylinder 15 for pushing the material test block out of the opening 41. An inlet and outlet liquid pipeline group 14 is connected between the multiple freeze-thaw molds 13, and the inlet and outlet liquid pipeline group 14 is connected to the liquid pump and liquid outlet tank provided inside the chassis 2 for injecting clean water or corrosive solution. A movable leakage detection mechanism 10 is installed on one side of the freeze-thaw test box 1. The leakage detection mechanism 10 includes a movable arm 101, and an infrared leak detector 102 is fixed at one end of the movable arm 101.

[0030] Specifically, a partition 11 is provided inside the freeze-thaw test chamber 1, which divides the freeze-thaw test chamber 1 into a driving chamber and a freeze-thaw chamber. Multiple freeze-thaw molds 13 are installed inside the freeze-thaw chamber. The outside of the freeze-thaw molds 13 is filled with freeze-thaw liquid to achieve cyclic freeze-thaw. Multiple lifting cylinders 15 are installed inside the driving chamber and are respectively located directly below the multiple freeze-thaw molds 13. A support plate 12 is provided inside the freeze-thaw mold 13. The top end of the lifting cylinder 15 is connected to the support plate 12 to push the material test block up. An antifreeze sealing ring is provided between the telescopic end of the lifting cylinder 15 and the partition 11 to prevent the freeze-thaw liquid from entering the driving chamber.

[0031] Specifically, the interior of the frame 3 is provided with a first box body 31 and a movable frame, and the water pressure system includes a liquid reservoir, a high-pressure pump, a pressure-stabilizing liquid reservoir liquid inlet regulating valve and a rigid telescopic water pipe 73. The telescopic end of the jack 71 is provided with a liquid outlet 72, and the rigid telescopic water pipe 73 is connected to the liquid outlet 72. Among them, the liquid reservoir, the high-pressure pump, and the pressure-stabilizing liquid reservoir liquid inlet regulating valve are all located in the first box body 31, and the jack 71 and the liquid outlet 72 are provided with pressure sensors that can detect the applied load force. The liquid reservoir is connected to the high-pressure pump, the high-pressure pump is connected to the pressure-stabilizing liquid reservoir, and the pressure-stabilizing liquid reservoir is connected to the liquid inlet regulating valve, so that high-pressure water can penetrate into the material test block from the liquid outlet 72 to detect its waterproof performance under high load conditions. The high-pressure water should be heated water, so that the detection by the infrared leak detector 102 can be clearer.

[0032] Specifically, the movable frame includes a longitudinal slide 34 and a vertical cylinder 32. The surface of the longitudinal slide 34 is provided with a slide 33. The annular grooving assembly and the grooved gluing assembly are both installed on the surface of the movable frame, and the vertical cylinder 32 is installed below the longitudinal slide 34, so as to realize the up and down and front and back movements of the annular grooving assembly and the grooved gluing assembly. The annular grooving assembly includes a driving motor 81 and an annular grooving cutter head 82. The grooves opened by the annular grooving cutter head 82 can match the contact surface of the telescopic end of the jack 71. The grooved gluing assembly includes an electric turntable 83. The surface of the electric turntable 83 is provided with a gluing head 84. The shape of the gluing head 84 matches the cross-section of the groove. The gluing head 84 is connected to the gluing barrel at the rear of the movable frame through a pipe. Since concrete has pores, the gaps may be larger after being eroded by freeze-thaw. If the side coated with sealant is in contact with the jack 71, it can well avoid water flowing out of the contact surface when loading water pressure for waterproofing.

[0033] Specifically, two positioning assemblies 91 are fixed on the sliding surface of the transverse moving assembly 9. The positioning assembly 91 is used to position the clamping fixture 6. The clamping fixture 6 includes two sliders 67 that are slidably connected to the guide rail 5. A door frame 61 is installed on the top of the two sliders 67. The top of the door frame 61 is connected to a threaded adjustment rod 62. The bottom of the threaded adjustment rod 62 is rotatably connected to the pressure plate 63. Support plates 65 are fixed to the two symmetrical side walls of the bottom end of the door frame 61. The surfaces of the support plate 65 and the pressure plate 63 are both provided with sockets 64. The inside of the socket 64 can be The cylindrical positioning column 66 is disassembled and inserted. The setting of the cylindrical positioning column 66 can be matched with the jack 71 to form a three-point compressive strength test, so as to test the waterproof performance of the material test block under high pressure. The positioning component 91 includes a mounting frame 913, and an electromagnet telescopic rod 911 is installed inside the mounting frame 913. The telescopic end of the electromagnet telescopic rod 911 is fixed with a clamping head 912, and the clamping head 912 matches the slot on the surface of the door frame 61. When the clamping head 912 can enter the interior of the door frame 61, fixation can be achieved.

[0034] Example 2:

[0035] Taking the Qiuzhuang Tunnel in the Jizao High-speed Railway as an example, the overall overview of the project is: total length 760m, the maximum burial depth of the tunnel is about 62m, the rock mass has developed joints and fissures, and the surrounding rock stability is general to good; the groundwater is generally abundant, and the water quality is corrosive to concrete structures; unfavorable geology: karst, gently dipping rock formations; special rock and soil are expansive soil and seasonally frozen soil, and the overall geological conditions are medium; therefore, when proportioning the concrete materials here, it is also necessary to consider the impact of the freeze-thaw cycle + chemical erosion + water pressure penetration multi-factor coupling environment faced by the concrete construction materials during service, and the impact on the waterproof performance, so as to be able to more accurately grasp the addition ratio of waterproof materials in this tunnel environment.

[0036] When in use, first prepare the concrete materials according to the conventional proportions, put them into the mold to shape them, and then place them under suitable humidity and temperature conditions for further curing for 28 days to maximize their strength and form material test blocks.

[0037] Before the water seepage test, the material test blocks are first placed in the freeze-thaw mold 13, and the prepared corrosive solvent is injected into the freeze-thaw mold 13 through the liquid inlet and outlet pipe group to conduct a corrosive test. At the same time, the freeze-thaw test box 1 performs a cycle of freeze-thaw on the material test blocks. After the freeze-thaw and corrosion are completed, the melted corrosive solution in the freeze-thaw mold 13 is extracted, and the opening 41 is opened. The material test block is lifted out of the opening 41 by the lifting cylinder 15, and then the clamping tool 6 is moved to the material test block position (such as Figure 6 ) Wherein a is the material test block, a1 is the annular slot, then the lifting cylinder 15 is lowered, the cylindrical positioning column 66 is inserted into the inside of the socket 64, and contacts the material test block, then the clamping tool 6 is moved to the slide surface of the transverse component 9 and is positioned under the action of the positioning component 91, the transverse component 9 is moved horizontally to the front of the sealing slotting mechanism 8, first, an annular slot is opened on the material test block through the annular slotting component, and then the slot is coated with sealant under the slot under the action of the vertical cylinder 32. Since concrete has pores, the gaps may be larger after being eroded by freeze-thaw. If the side coated with sealant is in contact with the jack 71, it can well avoid water flowing out of the contact surface when loading water pressure for waterproofing.

[0038] After applying the sealant, move the clamping tool 6 to the front of the jack 71, and move the jack 71 so that its end face is inserted into the slot, and pressurize the jack 71 to observe whether there are cracks. At the same time, increase the water pressure and detect the degree of water seepage through the leakage detection mechanism 10 to adjust the concrete material ratio. At the same time, different waterproof coatings can be sprayed on the side of the material test block away from the jack 71 to experiment how to achieve the best waterproof effect.

[0039] Example 3:

[0040] Taking the Zhongtanshan No. 1 Tunnel of the Jinzao High-Speed ​​Railway as an example, the project's overall profile is as follows: 440 meters in length, with ground elevations ranging from 65 to 151 meters, a relative height difference of 86 meters, generally undeveloped structures, well-developed rock mass joints and fissures, and fair to good surrounding rock stability; groundwater is generally abundant and non-corrosive to concrete structures; and the unique rock and soil are expansive soil and seasonally frozen soil. Therefore, the concrete construction materials here do not need to be considered for service in the presence of corrosive liquids. Therefore, before conducting water seepage testing, material test blocks are first placed in freeze-thaw molds 13. Normal clean water is then injected into the freeze-thaw molds 13 through the inlet and outlet pipes to conduct a freeze-thaw test. After the test is completed, subsequent operations can be carried out.

[0041] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A device for testing the waterproof performance of tunnel construction materials, comprising a freeze-thaw test chamber (1), a chassis (2) and a frame (3), characterized in that: A pressurized water injection system (7) and a sealing slotting mechanism (8) are arranged side by side inside the frame (3). The pressurized water injection system (7) includes a jack (71) and a water pressure system. The jack (71) is used to detect the load-bearing strength of the material test block. The water pressure system pressurizes water to detect the waterproof performance of the material test block under high load. The sealing slotting mechanism (8) includes an annular slotting component and a slotting glue coating component. The annular slotting component is used to make slots on the surface of the material test block. The slotting glue coating component is used to apply sealant to the slots. The surface of the freeze-thaw test chamber (1) is provided with a switch cover (4), a transverse movement component (9) is embedded between the switch cover (4) and the frame (3), a slide of the transverse movement component (9) and the surface of the switch cover (4) are provided with a guide rail (5) located in the same plane, and a clamping fixture (6) for fixing a material test block is slidably connected to the surface of the guide rail (5); A plurality of freeze-thaw molds (13) are fixedly installed inside the freeze-thaw test box (1), a plurality of sealable openings (41) matching the freeze-thaw molds (13) are provided on the top of the switch cover (4), each of the freeze-thaw molds (13) is connected to a lifting cylinder (15) for pushing a material test block out of the opening (41), and an inlet and outlet liquid pipe group (14) is connected between the plurality of freeze-thaw molds (13), and the inlet and outlet liquid pipe group (14) is connected to a liquid pump and a liquid outlet tank provided inside the box (2) for injecting clean water or an aggressive solution; A movable liquid leakage detection mechanism (10) is installed on one side of the freeze-thaw test chamber (1); The frame (3) is provided with a first box (31) and a movable frame inside, the annular slotting assembly includes a driving motor (81) and an annular slotting cutter head (82), the slots opened by the annular slotting cutter head (82) can match the contact surface of the telescopic end of the jack (71); the slotting and gluing assembly includes an electric turntable (83), a gluing head (84) is installed on the surface of the electric turntable (83), the shape of the gluing head (84) matches the cross section of the slot, and the gluing head (84) is connected to the gluing cylinder at the rear of the movable frame through a pipe; The clamping fixture (6) includes two sliders (67) slidably connected to the guide rail (5), a door frame (61) is commonly installed on the top of the two sliders (67), the top of the door frame (61) is connected to a threaded adjustment rod (62), the bottom of the threaded adjustment rod (62) is rotatably connected to a pressure plate (63), and support plates (65) are fixed to the two symmetrical side walls at the bottom end of the door frame (61), and the surfaces of the support plate (65) and the pressure plate (63) are both provided with a socket (64), and a cylindrical positioning column (66) is detachably inserted inside the socket (64).

2. A device for testing the waterproof performance of tunnel construction materials according to claim 1, characterized in that: A partition (11) is provided inside the freeze-thaw test chamber (1), and the partition (11) divides the freeze-thaw test chamber (1) into a driving chamber and a freeze-thaw chamber. A plurality of freeze-thaw molds (13) are installed inside the freeze-thaw chamber, and the outside of the freeze-thaw molds (13) is filled with freeze-thaw liquid for realizing cyclic freeze-thaw. A plurality of lifting cylinders (15) are installed inside the driving chamber and are respectively located directly below the plurality of freeze-thaw molds (13). A support plate (12) is provided inside the freeze-thaw molds (13), and the top end of the lifting cylinder (15) is connected to the support plate (12) for pushing the material test block upward.

3. The device for testing the waterproof performance of tunnel construction materials according to claim 1, characterized in that: The hydraulic system comprises a liquid reservoir, a high-pressure pump, a liquid inlet regulating valve of a pressure-stabilizing liquid storage tank, and a rigid telescopic water pipe (73); a liquid outlet hole (72) is provided at the telescopic end of the jack (71), and the rigid telescopic water pipe (73) is connected to the liquid outlet hole (72).

4. The device for testing the waterproof performance of tunnel construction materials according to claim 1, characterized in that: The movable frame includes a longitudinal slide (34) and a vertical cylinder (32), a slide (33) is provided on the surface of the longitudinal slide (34), the annular slotting assembly and the slotting and gluing assembly are both installed on the surface of the movable frame, and the vertical cylinder (32) is installed below the longitudinal slide (34).

5. The device for testing the waterproof performance of tunnel construction materials according to claim 1, characterized in that: Two positioning assemblies (91) are fixed on the sliding surface of the transverse moving assembly (9), and the positioning assemblies (91) are used to position the clamping tool (6).

6. The device for testing the waterproof performance of tunnel construction materials according to claim 1, characterized in that: The liquid leakage detection mechanism (10) comprises a movable arm (101), and an infrared leak detector (102) is fixed to one end of the movable arm (101).

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