Waterproof test device and method for underground comprehensive pipe gallery

Abstract

The invention relates to the technical field of pipe gallery waterproof engineering detection, in particular to a waterproof test device and method for an underground comprehensive pipe gallery, and the device is characterized in that one end of an outer pipe is an open end, and is used for simulating one end, with a birdmouth, of a pipe piece at a pipe gallery joint; one end of the inner pipe is an open end, and the open end of the inner pipe is inserted into the open end of the outer pipe and is used for simulating an insertion connection structure at a pipe gallery joint; a sealing ring is arranged on the outer wall of the open end of the inner pipe and used for simulating a sealing piece of a pipe piece at a pipe gallery joint. The outer pipe and the inner pipe are arranged in a test box, the test box is correspondingly connected with a water source, and the underground water state of the area where the pipe gallery is located is simulated by controlling the pressure and flow velocity of the water source. According to the waterproof performance of the water-stop sealing ring measured through the test, the waterproof capacity of the water-stop rubber ring, closest to the actual working condition, at the pipe gallery bell and spigot joint is obtained, and the method has high practical value for the waterproof design of the rectangular jacking pipe and actual engineering.

Description

Technical Field

[0001] The invention belongs to the technical field of pipeline gallery waterproof engineering detection, and specifically relates to a waterproof test device and method for an underground comprehensive pipeline gallery. Background Art

[0002] The integrated pipe gallery refers to an underground urban pipeline integrated corridor, that is, to build a tunnel underground space in the city, integrate various pipelines such as electricity, communication, water supply and drainage, natural gas, etc. according to certain spatial layout requirements, and set up special maintenance channels, lifting ports and monitoring systems, etc., to form an integrated underground pipeline corridor. In the construction process of the integrated pipe gallery, waterproofing is a difficult point in its construction process. Once the pipe gallery leaks, it is usually more difficult to solve and repair than the waterproofing of the roof and exterior wall, and even safety accidents may occur. Therefore, in order to promote the development of the integrated pipe gallery, it is necessary to select appropriate construction methods according to local conditions, and to study the characteristics of the sealing structure of the pipe gallery, so as to formulate a waterproofing plan scientifically and reasonably. The existing sample device generally tests a certain waterproof parameter, and it is impossible to obtain the real waterproof parameter of the pipe gallery.

[0003] Therefore, it is necessary to provide an improved technical solution to address the above-mentioned deficiencies in the prior art. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the above-mentioned prior art. The present invention provides a waterproof test device and method for an underground comprehensive pipe gallery.

[0005] In order to achieve the above object, the present invention provides the following technical solutions: A waterproof test device for an underground integrated pipe gallery, comprising: An outer pipe, one end of which is an open end, used to simulate an end of a pipe segment at a pipe gallery joint with a receiving interface; An inner tube, one end of which is an open end, and the open end of the inner tube is inserted into the open end of the outer tube to simulate the socket connection structure at the pipe gallery joint; Wherein, a sealing ring is provided on the outer wall of the open end of the inner pipe, which is used to simulate the sealing of the pipe segment at the joint of the pipe gallery; The outer pipe and the inner pipe are placed in a test box, and the test box is connected to a water source. The groundwater state in the area where the pipeline corridor is located is simulated by controlling the water source pressure and flow rate.

[0006] Preferably, the test box further comprises: Push rods, two of which are respectively located on two inner walls of the test box, so as to apply stress to the outer pipe and the inner pipe respectively, so as to simulate the thrust force received by the actual installation of the pipe gallery; A water conduit is provided on the side wall of the test box, and water is injected into the water source to simulate the groundwater state in the area where the pipe gallery is located; A pressure plate is arranged at the opening of the test box and is used to seal the test box.

[0007] Preferably, the test box further comprises: A soil sample is filled in the test box to simulate the soil condition of the area where the pipeline corridor is located; the pressure plate is slid longitudinally and sealed at the open part of the test box, and an extrusion rod is provided above the pressure plate to squeeze the soil sample to simulate the soil pressure of the area where the pipeline corridor is located.

[0008] Preferably, a fluorescent agent is added to the water source injected into the test box, and a camera is provided inside the outer tube facing the joint of the outer tube and the inner tube; A pressure gauge and a flow meter are provided on the water conduit.

[0009] Preferably, a first push rod and a second push rod located at both ends of the outer tube are provided at the bottom of the test box to drive the outer tube and the inner tube to deflect, so as to measure the influence of the deflection angle on the sealing of the pipe gallery.

[0010] Preferably, a displacement meter is provided at the head and tail of the outer tube respectively, so as to detect the deflection angle of the outer tube through the moving distance of the two displacement meters in the longitudinal direction.

[0011] Preferably, the outer wall of the inner tube is provided with no less than two mounting grooves corresponding to the sealing rings, and the outer wall of the sealing ring is polished by sandpaper to adjust the roughness of the sealing ring.

[0012] A waterproof test method for an underground integrated pipe gallery, which is conducted by using any of the test devices, comprising: Step S1, assembling the outer pipe and the inner pipe to simulate the sealing structure of the pipe gallery, connecting the water source to the test device, and recording the flow rate and pressure of the water through a flow meter and a pressure gauge; Step S2, start water injection and gradually increase the water pressure, and record the relationship between the water pressure and the flow rate during the water injection process; Step S3, observe whether there is water leakage at the connection between the outer tube and the inner tube, and record the water pressure and water flow parameters under the water leakage state; Step S4, repeat steps S1-S3 after changing the experimental parameters, record the experimental data, and draw the above data into a curve graph.

[0013] Preferably, in step S4, the height of the sealing ring between the outer wall of the inner tube and the inner wall of the outer tube is changed to verify the influence of different sealing ring compression heights on the waterproof performance of the joint; The deflection angles of the inner tube and the outer tube were changed to verify the influence of different deflection angles on the waterproof performance of the seam.

[0014] Preferably, in step S4, one or two sealing rings are respectively provided for pressure testing to study the influence of single or double sealing rings on the waterproof performance of the joint.

[0015] Beneficial effect: The waterproof performance of the water-stop sealing ring is measured through the test, so as to obtain the waterproof capacity of the water-stop rubber ring at the pipe gallery socket joint that is closest to the actual working conditions, which has great practical value for the rectangular jacking waterproof design and actual engineering. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. Among them: Figure 1 A simplified structural diagram of a test box in a specific embodiment provided by the present invention; In the figure: 1. test box; 2. water pipe; 3. outer tube; 4. inner tube; 5. push rod; 6. first push rod; 7. pressure plate; 8. extrusion rod; 9. camera; 10. sealing ring; 11. push plate; 12. second push rod. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0018] In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0019] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0020] like Figure 1As shown, a waterproof test device for an underground integrated pipe gallery comprises an outer pipe 3 and an inner pipe 4, wherein the outer pipe 3 and the inner pipe 4 are both square pipes made of Q235 steel, and are used to simulate the rectangular top pipe F-type socket joint of an actual pipe gallery, one end of the outer pipe 3 is an open end, which is used to simulate the end of the pipe segment at the pipe gallery joint having a socket; one end of the inner pipe 4 is an open end, which is used to simulate the end of the pipe segment at the pipe gallery joint inserted into the socket, the open end of the inner pipe 4 is inserted into the open end of the outer pipe 3, which is used to simulate the socket connection structure at the pipe gallery joint, and the outer wall of the open end of the inner pipe 4 is provided with a sealing ring 10, which is used to simulate the sealing of the pipe segment at the pipe gallery joint, thereby simulating the actual working conditions of the pipe gallery, so as to test the influence of different parameters on the waterproof ability of the underground integrated pipe gallery, provide guidance data for later construction, and ensure that the joint between the two sections of the pipe gallery can effectively prevent water leakage during actual construction.

[0021] The outer tube 3 and the inner tube 4 are placed in the test box 1, and the test box 1 is connected to a water source. By controlling the water source pressure and flow rate to simulate the groundwater state of the area where the corridor is located, the waterproof condition of the corridor under real conditions can be obtained, thereby improving the authenticity of the data.

[0022] In an optional embodiment, the main body of the test box 1 is a square structure with an open experimental inner cavity at the top. In order to simulate the jacking force that the pipeline corridor is actually subjected to during installation, a push rod 5 is arranged inside the test box 1. The push rod 5 can be a hydraulic cylinder or a pneumatic cylinder. The two push rods 5 are respectively located on the two inner walls opposite to each other of the test box 1, and respectively contact the sealed ends of the outer tube 3 and the inner tube 4 to apply stress to the outer tube 3 and the inner tube 4 respectively. The jacking force that should be applied by the outer tube 3 and the inner tube 4 is calculated by geometric scaling, and then the jacking force is simulated by applying external force.

[0023] A push plate 11 is hinged at one end of the push rod 5 corresponding to the inner tube 4 or the outer tube 3. The shape of the push plate 11 is adapted to the sealed end of the inner tube 4 or the outer tube 3, and is fixed to the end of the inner tube 4 or the outer tube 3 by bolts, thereby ensuring that the push plate 11 can still apply stress in an inclined state. Pressure sensors are respectively provided between the push plate 11 and the inner tube 4 or the outer tube 3 to ensure the accuracy of the thrust force.

[0024] A water pipe 2 is provided on the side wall of the test box 1, through which water is taken in and out, so that water is injected by a water pump to simulate the groundwater state in the area where the pipeline corridor is located; a pressure plate 7 is provided at the open part of the test box 1 to seal the test box 1.

[0025] In an optional embodiment, a plurality of water pipes 2 are provided on the four circumferential side walls of the test box 1, and the plurality of water pipes 2 are distributed in an array on the corresponding side walls of the test box 1. According to the seepage field of the set pipe gallery area, different water pipes 2 on different side walls of the test box 1 (generally two opposite side walls) are selected to let water in or out respectively, thereby simulating a real seepage field.

[0026] During actual water injection, the water pipe 2 is selected according to the flow direction of the seepage field. One or more water pipes 2 can be selected as the water inlet pipe and the water outlet pipe (at least one water inlet pipe and one water outlet pipe). Except for the water pipes 2 selected as the water inlet pipe and the water outlet pipe, the remaining water pipes 2 are sealed during the test.

[0027] No less than four water pipes 2 are provided on any side of the test box 1. The four water pipes 2 are distributed in an array on the side wall of the test box 1, thereby dividing the side wall of the test box 1 into four equal parts, so that different water pipes 2 can be rotated according to actual seepage field requirements.

[0028] Of course, the number of water conduits 2 on the side wall of each test box 1 may be 6, 8, 10 or 12.

[0029] In an optional embodiment, a camera 9 is provided inside the outer tube 3 facing the joint of the outer tube 3 and the inner tube 4, for observing whether water seepage occurs at the joint. In order to accurately observe leakage in the dark, a fluorescent agent is added to the water source injected into the test box 1. The camera 9 can be a 360-degree camera 9, or four cameras 9 are provided corresponding to the four side walls of the test box 1 respectively, and a light for exciting the fluorescent agent is provided on the camera 9 corresponding to the fluorescent agent.

[0030] A pressure gauge and a flow meter are provided on the water pipe 2 to obtain the most realistic understanding of the water injection status.

[0031] In this embodiment, in order to more realistically simulate the soil conditions in the area where the pipeline corridor is located, a soil sample is filled in the test box 1, and the soil sample can be taken from the actual construction site. At this time, the pressure plate 7 slides longitudinally and seals the open part of the test box 1. For example, a sealing strip corresponding to the inner wall of the test box 1 is provided on the outer edge of the pressure plate 7 to form a piston structure, and an extrusion rod 8 is provided above the pressure plate 7. The extrusion rod 8 can be a hydraulic rod, which is used to squeeze the soil sample to simulate the soil pressure in the area where the pipeline corridor is located.

[0032] When setting up soil samples, first inject water for 1-5 minutes, and then start measuring various data to truly restore the soil state of the underground seepage field.

[0033] In an optional embodiment, a first push rod and a second push rod are provided at both ends of the outer tube at the bottom of the test box. The first push rod 6 and the second push rod 12 are both hydraulic rods. A top plate is hinged at the piston end of the push rod. A pressure sensor is provided between the top plate and the outer tube. The first push rod 6 is used to apply load to the model to measure the bending and shearing resistance data, so as to explore the bending and shearing resistance capacity of the pipeline corridor.

[0034] In an optional embodiment, the first push rod 6 and the second push rod 12 are pushed upward respectively, and when the inner tube and the outer tube are limited by the push plate 11 at one end away from each other, the inner tube and the outer tube are deflected. By changing the deflection angle of the outer wall of the tube 4 and the outer tube 3, the influence of different deflection angles on the waterproof performance of the joint is explored.

[0035] A displacement meter is set at the head and tail of the inner pipe and the outer pipe respectively. The first push rod 6 is used to push up to cause the inner pipe and the outer pipe to deflect. The displacement meter can be used to determine the deflection angle. The deflection angle is adjusted according to the lifting height of the first push rod 6 to simulate the adjustment of the deflection angle of the pipeline corridor.

[0036] Furthermore, the first jack 6 and the second jack are synchronously lifted to apply a jacking force to the outer pipe, thereby applying a load to the model to test the bending and shearing resistance of the pipeline gallery.

[0037] In an optional embodiment, the outer wall of the inner tube 4 is provided with no less than two installation grooves corresponding to the sealing ring 10. The outer wall of the sealing ring 10 is polished by sandpaper to adjust the roughness of the sealing ring 10. The influence of water-stop sealing rings with different hardness and roughness on the waterproof performance of the joint is investigated. The hardnesses are 45HA, 55HA, 65HA, and 75HA respectively; the roughnesses are 0.4μm, 0.5μm, 0.6μm, 0.7μm, 0.8μm, 0.9μm, 1.0μm, 1.1μm, and 1.2μm respectively.

[0038] Based on the above test device, this application also provides a waterproof test method for an underground integrated pipe gallery, including: Step S1, prepare an underground integrated pipe gallery model and ensure that the connections of the model conform to the actual situation. Specifically, assemble the outer pipe 3 and the inner pipe 4 to simulate the sealing structure of the pipe gallery, connect the water source to the test device, and record the water flow and pressure through the flow meter and pressure gauge to ensure that the flow rate and pressure of the seepage field inside the test box 1 are understood.

[0039] Step S2, start water injection and gradually increase the water pressure, and record the relationship between water pressure and flow during the water injection process; Step S3, observe whether there is water leakage at the connection between the outer tube 3 and the inner tube 4, and record the water pressure and water flow parameters under the water leakage state; Step S4, repeat steps S1-S3 after changing the experimental parameters, record the experimental data, and draw the above data into a curve graph.

[0040] In an optional embodiment, in step S4, different geological conditions are simulated by changing the test parameters; the actual geological parameters include but are not limited to soil state, seepage field pressure, flow rate, direction, soil pressure in the area, thrust force, between the inner tube 4 and the outer tube 3, deflection angle, sealing ring height, quantity, hardness, roughness, etc. For example, in step S4, the sealing ring height between the outer wall of the inner tube 4 and the inner wall of the outer tube 3 is changed, and the sealing ring is a water-stopping rubber belt, so as to verify the influence of different sealing ring heights on the waterproof performance of the joint; the deflection angle of the inner tube 4 and the outer tube 3 is verified to verify the influence of different deflection angles on the waterproof performance of the joint.

[0041] Alternatively, the deflection angle is set to ±0.03 rad, and the height of the sealing ring is increased or decreased by 1 mm. Experiments are conducted according to different working conditions to explore the effects of different sealing ring heights on the waterproof performance of the joint, so as to find the best working condition under the interaction conditions.

[0042] Or, the installation clearance is fixed at 15mm, and the pipe section installation deflection angles are -0.03, -0.02, -0.01, +0.01, +0.02, and +0.03 respectively.

[0043] Alternatively, set up one or two sealing rings for pressure testing, study the influence of single and double sealing rings on the waterproof performance of the joint, and explore the influence of water-stop sealing rings with different hardness and roughness on the waterproof performance of the joint. The hardnesses are 45HA, 55HA, 65HA, and 75HA respectively.

[0044] Or, use sandpaper to polish the sealing ring to change the roughness, and then use a roughness meter to test it after polishing. The roughness is 0.4μm, 0.5μm, 0.6μm, 0.7μm, 0.8μm, 0.9μm, 1.0μm, 1.1μm, 1.2μm.

[0045] Generally speaking, the test consists of two phases: the water filling phase and the main test phase. In the water filling phase, the box is completely filled with water to observe the occurrence of water leakage.

[0046] In the main test phase, the water pressure was first increased from 0 to 0.1MPa and maintained for 24 hours; the water pressure was increased from 0.1MPa to 0.2MPa and maintained for 24 hours; the water pressure was increased from 0.2MPa to 0.3MPa and maintained for 24 hours; and finally the pressure was released. Based on the data recorded in the experiment, conclusions were drawn about the waterproofing capacity of the underground comprehensive pipe gallery and the main influencing factors were analyzed.

[0047] Statistics on leakage under different water pressures are collected, and the time when leakage occurs is recorded to obtain the maximum water pressure that the pipeline corridor can withstand under different working conditions.

[0048] Alternatively, the design water pressure of the construction section can be obtained in advance, and the parameters of the sealing ring height, deflection angle, and roughness can be adjusted while maintaining the water pressure, so as to obtain the best working conditions for a certain construction site.

[0049] During the measurement process, the leakage volume is observed, the waterproof capacity of the pipe gallery connection is evaluated, and a curve chart is drawn based on the leakage situation and different operating parameters. The water pressure resistance range of the pipe gallery connection is determined through analysis.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are within the scope of protection of the pending claims of the present invention.

Claims

1. A waterproof test device for an underground integrated pipe gallery, characterized in that: include: An outer pipe, one end of which is an open end, used to simulate an end of a pipe segment at a pipe gallery joint with a receiving interface; An inner tube, one end of which is an open end, and the open end of the inner tube is inserted into the open end of the outer tube to simulate the socket connection structure at the pipe gallery joint; Wherein, a sealing ring is provided on the outer wall of the open end of the inner pipe, which is used to simulate the sealing of the pipe segment at the joint of the pipe gallery; The outer pipe and the inner pipe are placed in a test box, and the test box is connected to a water source to simulate the groundwater state in the area where the pipe gallery is located by controlling the water source pressure and flow rate; The test box also includes: Push rods, two of which are respectively located on two inner walls of the test box, so as to apply stress to the outer pipe and the inner pipe respectively, so as to simulate the thrust force received by the actual installation of the pipe gallery; A water conduit is provided on the side wall of the test box, and water is injected into the water source to simulate the groundwater state in the area where the pipe gallery is located; A pressing plate, which is arranged at the opening of the test box and is used to seal the test box; The bottom of the test box is provided with a first push rod and a second push rod located at both ends of the outer tube to drive the outer tube and the inner tube to deflect, so as to measure the influence of the deflection angle on the sealing performance of the pipe gallery.

2. The waterproof test device for the underground integrated pipe gallery according to claim 1 is characterized in that: The test box also includes: A soil sample is filled in the test box to simulate the soil condition of the area where the pipeline corridor is located; the pressure plate is slid longitudinally and sealed at the open part of the test box, and an extrusion rod is provided above the pressure plate to squeeze the soil sample to simulate the soil pressure of the area where the pipeline corridor is located.

3. The waterproof test device for the underground integrated pipe gallery according to claim 1 is characterized in that: A fluorescent agent is added to the water source injected into the test box, and a camera is provided inside the outer tube facing the joint of the outer tube and the inner tube; A pressure gauge and a flow meter are provided on the water conduit.

4. The waterproof test device for the underground integrated pipe gallery according to claim 1 is characterized in that: A displacement meter is arranged at the head and tail of the outer tube respectively, so as to detect the deflection angle of the outer tube through the moving distance of the two displacement meters in the longitudinal direction.

5. The waterproof test device for the underground integrated pipe gallery according to claim 1 is characterized in that: The outer wall of the inner tube is provided with no less than two mounting grooves corresponding to the sealing rings, and the outer wall of the sealing ring is polished by sandpaper to adjust the roughness of the sealing ring.

6. A waterproof test method for an underground utility corridor, wherein the test is performed by using the test device described in any one of claims 1 to 5, characterized in that: include: Step S1, assembling the outer pipe and the inner pipe to simulate the sealing structure of the pipe gallery, connecting the water source to the test device, and recording the flow rate and pressure of the water through a flow meter and a pressure gauge; Step S2, start water injection and gradually increase the water pressure, and record the relationship between the water pressure and the flow rate during the water injection process; Step S3, observe whether there is water leakage at the connection between the outer tube and the inner tube, and record the water pressure and water flow parameters under the water leakage state; Step S4, repeat steps S1-S3 after changing the experimental parameters, record the experimental data, and draw the above data into a curve graph.

7. The waterproof test method for an underground utility corridor according to claim 6, characterized in that: In step S4, the height of the sealing ring between the outer wall of the inner tube and the inner wall of the outer tube is changed to verify the influence of different sealing ring compression heights on the waterproof performance of the joint; The deflection angles of the inner tube and the outer tube were changed to verify the influence of different deflection angles on the waterproof performance of the seam.

8. The waterproof test method for an underground utility corridor according to claim 6, characterized in that: In step S4, one or two sealing rings are respectively provided for pressure testing to study the influence of single or double sealing rings on the waterproof performance of the joint.

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