Testing device capable of adjusting leakage degree of underground pipeline to induce road collapse

Abstract

The utility model discloses a test device for road collapse induced by adjusting the leakage degree of an underground pipeline. The test device comprises a model box, a pipeline capable of automatically adjusting the leakage degree, a water tank capable of adjusting the water supply direction, a test soil body, a data acquisition instrument and a road model. The pipeline capable of automatically adjusting the leakage degree is buried below the road model and is communicated with the water supply direction-adjustable water tank through a side hole of the model box; the displacement sensor is arranged on the surface of the road model, the pore water pressure sensor is arranged between the automatic leakage degree adjusting pipeline and the road model, and all the sensors are connected with the data acquisition instrument through connecting lines. By switching the water supply direction of the water tank, controlling the leakage degree of the pipeline from a slight stage to a serious stage and monitoring road model settlement and soil pore water pressure data in real time, the dynamic process of settlement or collapse of an urban road caused by underground pipeline leakage is simulated, and scientific support is provided for prediction and prevention of urban road collapse.

Description

Technical Field

[0001] This utility model patent relates to the field of underground pipeline leakage, specifically, to a test device that can adjust the degree of underground pipeline leakage to induce road collapse. Background Art

[0002] Urban underground pipeline networks are a vital component of urban infrastructure and crucial to the proper functioning of cities, serving as the very embodiment of their "lifeline." However, real-time monitoring of underground pipelines is difficult. When underground pipelines leak, the liquid at the leaking site not only changes the mechanical properties of the soil but also raises the groundwater level, complicating underground construction and leading to urban road collapses, traffic congestion, and potential damage to human life and property. Similarly, a lack of understanding of the relationship between road collapse and underground pipeline leakage prevents engineers from promptly addressing the situation when ground subsidence begins, leading to road collapses. Therefore, improving understanding of the relationship between road settlement, soil mechanical property changes, and underground pipeline leakage is crucial for preventing and addressing urban road collapses. With the acceleration of urbanization and the increasing scarcity of land resources, more and more pipelines are being relocated from above-ground locations, creating an urgent need to prevent and address the problem of surface road collapses.

[0003] Previous studies have shown that underground pipeline leakage causes changes in the pore water pressure of the soil beneath the road, reducing the soil's bearing capacity and leading to road collapse. However, existing research methods do not establish a dynamic study process, namely, how the soil moisture content and road settlement displacement dynamically develop to the level that triggers road collapse as the degree of underground pipeline leakage progresses from mild to severe. Therefore, studying the dynamic changes of these two factors during underground pipeline leakage is crucial for preventing and treating urban road collapse. Therefore, there is an urgent need for a test device that can autonomously adjust the degree of underground pipeline leakage to cause road collapse. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of the present invention is to overcome the above-mentioned shortcomings and propose a testing device that can adjust the degree of leakage of underground pipelines to induce road collapse.

[0005] In order to achieve the above object, the utility model comprises the following steps:

[0006] A test device capable of adjusting the leakage degree of underground pipelines to induce road collapse, comprising a model box, a pipeline capable of automatically adjusting the leakage degree, and a water tank capable of adjusting the water supply direction;

[0007] The model box includes a road model, a soil body and an automatic leakage adjustment pipe. A displacement sensor is set on the surface of the road model, and a pore water pressure sensor is set in the soil body. The displacement sensor and the pore water pressure sensor are connected to the data acquisition instrument through a sensor connection line.

[0008] The automatic leakage adjustment pipe is composed of a high-strength polyvinyl chloride round pipe, a connector, a knob component and a filter screen. The outer surface of the automatic leakage adjustment pipe is covered with a layer of permeable template cloth; the connector is installed above the high-strength polyvinyl chloride round pipe, the adjustment knob is installed in the middle of the connector, and the filter screen is arranged at both ends of the high-strength polyvinyl chloride round pipe;

[0009] The water tank with adjustable water supply direction is connected to the automatic leakage adjustment pipe through a connecting pipe, and supplies water to the automatic leakage adjustment pipe in a clockwise or counterclockwise direction;

[0010] Furthermore, holes are provided on both sides of the model box for installing connecting pipes and automatic leakage adjustment pipes;

[0011] Furthermore, the high-strength polyvinyl chloride round tube is provided with holes and grooves on its upper surface, the connector is connected to the high-strength polyvinyl chloride round tube through the holes and grooves, and epoxy resin is applied on the contact surface of the two for bonding and reinforcement;

[0012] Furthermore, a through hole is provided in the middle of the connector and an internal thread is processed in the hole to form a threaded inner wall;

[0013] Furthermore, the knob component is composed of an external thread, a stud, a blocker and a baffle;

[0014] Furthermore, lubricating oil is applied to the threads of the knob component and the connector, and then they are connected through the threads.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] (1) The present invention, through the provision of connectors and knob components, can simulate the situation of slight or severe leakage in underground pipelines by simply changing the direction of water flow in the pipeline. At the same time, when modeling underground pipeline leakage, the interference caused by non-test factors on the soil, road and underground pipeline models is minimized, and the impact of underground pipeline leakage on the road is simulated to a large extent.

[0017] (2) This utility model uses a test device that can adjust the degree of underground pipeline leakage to induce road collapse. It can accurately simulate the situation where underground pipeline leakage causes road collapse, and monitor the dynamic changes in road settlement displacement and the mechanical properties of the surrounding soil. On the one hand, it improves the understanding of the complex relationship between road collapse and underground pipeline leakage; on the other hand, it has certain significance for the prediction and solution of urban road collapse problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0019] Figure 1 This is a schematic structural diagram of a test device capable of adjusting the degree of underground pipeline leakage to induce road collapse in the present invention;

[0020] Figure 2 Schematic cross-sectional view of a model box in Example 1 of the present invention;

[0021] Figure 3 A partial side view schematic diagram of a pipeline for automatically adjusting leakage level provided in the present invention;

[0022] Figure 4 A partial front view schematic diagram of a pipeline for automatically adjusting leakage level provided in the present invention;

[0023] Figure 5 A partial top view schematic diagram of a pipeline for automatically adjusting leakage level provided in the present invention;

[0024] Figure 6 A schematic side view of a knob component provided in the present invention;

[0025] Figure 7 A schematic top view of a knob component provided in the present invention;

[0026] Figure 1-7 In: 1-model box; 2-data acquisition instrument; 3-water tank with adjustable water supply direction; 4-connecting pipe; 5-filter screen; 6-displacement sensor; 7-sensor connecting line; 8-soil; 9-pore water pressure sensor; 10-road model; 11-knob component; 12-automatic leakage adjustment pipe; 13-permeable template cloth; 14-connector; 15-groove; 16-barrier; 17-threaded inner wall; 18-inlet; 19-external thread; 20-baffle; 21-high-strength polyvinyl chloride round pipe; 22-stud. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Unless otherwise defined, the directions of up, down, left, right, front, and back involved in this document are based on the directions of up, down, left, right, front, and back shown in the figures of the present invention, and are explained here together.

[0029] See also Figures 1 to 7 The utility model is further described.

[0030] A test device for inducing road collapse by adjusting the leakage degree of an underground pipeline, characterized in that it includes a model box 1, an automatically adjustable leakage degree pipeline 12 and an adjustable water supply direction water tank 3; the model box 1 is laid with soil 8, an automatically adjustable leakage degree pipeline 12, soil 8 and a road model 10 in sequence from bottom to top; a displacement sensor 6 is set on the surface of the road model 10, a pore water pressure sensor 9 is set inside the soil 8, and inlets 18 are opened on both side walls of the model box 1; the automatically adjustable leakage degree pipeline 12 is composed of a connector 14, a knob component 11, a high-strength polyvinyl chloride round tube 21 and a filter screen 5; the outer surface of the automatically adjustable leakage degree pipeline 12 is covered with a permeable template cloth 13; the displacement sensor 6 and the pore water pressure sensor 9 are connected to the data acquisition instrument 2 through a sensor connecting line 7; the adjustable water supply direction water tank 3 is connected to the automatically adjustable leakage degree pipeline 12 through a connecting pipe 4.

[0031] In the above embodiment, the soil is evenly laid in the model box 1 and the soil type can be selected according to actual conditions; the water tank 3 with adjustable water supply direction needs to continuously supply water and ensure that the water flow in the automatically adjusted leakage degree pipeline is full.

[0032] Furthermore, the automatic leakage adjustment pipe 12 is composed of a high-strength polyvinyl chloride round tube 21, a connector 14, a knob component 11 and a filter screen 5. The connector 14 is made of high-strength lightweight aluminum alloy, a through hole is opened in the middle, and an internal thread is processed in the hole to form a threaded inner wall 17; the knob component 11 is composed of an external thread 19, a stud 22, a blocker 16 and a baffle 20. The knob component 11 is made of high-strength lightweight aluminum alloy through a CNC machine tool; the external thread 19 is used to connect to the connector 14; the baffle 20 is used to drive the knob component 11 to rotate upward or downward when water flows through; the blocker 16 is used to prevent the knob component 11 from rotating excessively upward.

[0033] In the above embodiment, the connector 14 and the knob component 11 are mechanically connected through internal and external threads, and the knob component 11 is entirely processed by a CNC machine tool to ensure that it has high strength and rigidity.

[0034] Furthermore, the permeable template cloth 13 is evenly wrapped around the surface of the pipeline 12 that automatically adjusts the leakage degree.

[0035] In the above embodiment, the permeable template cloth 13 is used to prevent small particles in the soil from entering the thread gap between the connector 14 and the knob component 11, preventing the thread gap from being blocked, causing water to be unable to seep out and the knob component 11 to rotate poorly.

[0036] Furthermore, the filter screen 5 has a large aperture and is installed at both ends of the pipeline 12 that automatically adjusts the leakage degree.

[0037] In the above embodiment, the mesh size of the filter 5 reduces the impact of the water flow on the filter 5 on the one hand, and on the other hand prevents the knob component 11 from entering the water tank 3 with adjustable water supply direction when the knob component 11 rotates downward due to the water flow until it falls.

[0038] Furthermore, the water tank 3 with adjustable water supply direction can supply water to the automatic leakage adjustment pipe 12 through the connecting pipe 4 in a clockwise or counterclockwise direction.

[0039] In the above embodiment, when the threaded connection between the connector 14 and the knob component 11 is clockwise, that is, when the knob component 11 moves upward in a clockwise manner, the water supply direction of the adjustable water tank 3 is supplied in a clockwise direction. The water flow drives the baffle 20 to rotate, causing the knob component 11 to move upward until the barrier 16 contacts the wall of the automatic leakage adjustment pipe 12, so that the knob component 11 no longer moves, and the water flows out through the threaded gap between the connector 14 and the knob component 11, and then penetrates into the soil 8 through the permeable template cloth 13, thereby simulating the situation when the underground pipeline has a slight leakage. At this time, the water supply direction of the water tank 3 can be adjusted to reverse the water supply direction. When water is supplied in a counterclockwise direction, the water flow drives the baffle 20 to rotate, causing the knob component 11 to move downward. At this time, the threaded connection between the connector 14 and the knob component 11 is weakened, making it easier for water to pass through the threaded gap between the two and enter the soil 8. When the knob component 11 is completely detached, the water flows out from the through hole of the connector 14 and enters the soil 8, thereby simulating the situation when the underground pipeline is seriously leaking.

[0040] Furthermore, the road model 10 is made of cement mortar to simulate the actual road structure.

[0041] In the above embodiments, the road model 10 is horizontally arranged on the soil 8 to avoid the occurrence of cavities below the road model that would affect the test results.

[0042] Furthermore, the automatic leakage adjustment pipe 12 and the connector 14 are connected to the high-strength polyvinyl chloride round tube 21 through the holes opened on the high-strength polyvinyl chloride round tube 21 and the grooves 15 set around the holes, and epoxy resin is applied to the connection for bonding and reinforcement.

[0043] In the above embodiment, a groove 15 is provided for connecting the connector 14 to the high-strength polyvinyl chloride round tube 21, and epoxy resin is used for bonding and reinforcement to prevent the connector 14 from being separated from the high-strength polyvinyl chloride round tube 21 due to excessive water pressure in the pipeline; lubricating oil is applied to the surface of the inner thread 17 and the outer thread 19 to allow the knob component 11 to rotate smoothly.

[0044] The specific workflow is described in detail below:

[0045] 1) Determine the size of the road model, soil type, and diameter of the pipe for automatically adjusting the leakage level in the test device based on actual conditions;

[0046] 2) According to Figure 2 As shown, soil, automatic leakage adjustment pipes, displacement sensors, pore water pressure sensors and road models are arranged in the model box;

[0047] 3) Install the connecting pipe and the water tank with adjustable water supply direction;

[0048] 4) Install data acquisition equipment;

[0049] 5) The water tank with adjustable water supply direction is started to supply water in the direction of the water flow caused by rotating the knob upward, and receives data monitored by the displacement sensor and pore water pressure sensor in real time; after a certain period of time, the water supply direction is changed to put the automatically adjustable leakage pipe into a serious leakage state until the road model shows a large degree of settlement and displacement.

[0050] Although this specification has provided a detailed description of the present invention using general instructions and specific embodiments, it will be apparent to those skilled in the art that modifications or improvements may be made to the present invention. Therefore, any such modifications or improvements that do not depart from the spirit of the present invention are intended to fall within the scope of protection claimed herein.

Claims

1. A test device capable of adjusting the degree of underground pipeline leakage to induce road collapse, characterized by: The invention comprises a model box (1), an automatic leakage adjustment pipe (12), and an adjustable water supply direction water tank (3); the model box (1) is sequentially laid with soil (8), the automatic leakage adjustment pipe (12), the soil (8), and the road model (10) from bottom to top; a displacement sensor (6) is arranged on the surface of the road model (10), a pore water pressure sensor (9) is arranged inside the soil (8), and inlets (18) are provided on both side walls of the model box (1); the automatic leakage adjustment pipe (12) is provided with a pressure sensor (9) and a pressure sensor (18) is provided on the pressure sensor (9) on both sides of the model box (1); The automatic leakage adjustment pipe (12) is composed of a connector (14), a knob component (11), a high-strength polyvinyl chloride round tube (21) and a filter screen (5); the outer surface of the automatic leakage adjustment pipe (12) is covered with a permeable template cloth (13); the displacement sensor (6) and the pore water pressure sensor (9) are connected to the data acquisition instrument (2) through a sensor connecting line (7); and the adjustable water supply direction water tank (3) is connected to the automatic leakage adjustment pipe (12) through a connecting pipe (4).

2. A test device capable of adjusting the degree of underground pipeline leakage to induce road collapse according to claim 1, characterized in that: The automatic leakage adjustment pipe (12) is composed of a high-strength polyvinyl chloride round tube (21), a connector (14), a knob component (11) and a filter (5); the connector (14) is made of a high-strength lightweight aluminum alloy, a through hole is opened in the middle, and an internal thread is processed in the hole to form a threaded inner wall (17); the knob component (11) is composed of an external thread (19), a stud (22), a blocker (16) and a baffle (20), and the knob component (11) is integrally processed from a high-strength lightweight aluminum alloy by a CNC machine tool; the external thread (19) is used to connect with the connector (14); the baffle (20) is used to drive the knob component (11) to rotate upward or downward when water flows through; the blocker (16) is used to prevent the knob component (11) from excessively rotating upward.

3. The test device for inducing road collapse by adjusting the leakage degree of underground pipelines according to claim 1, characterized in that: The permeable template cloth (13) is evenly wrapped on the surface of the pipeline (12) that automatically adjusts the leakage degree.

4. The test device for inducing road collapse by adjusting the degree of underground pipeline leakage according to claim 1, characterized in that: The filter screen (5) has a large aperture and is installed at both ends of a high-strength polyvinyl chloride round tube (21).

5. The test device for inducing road collapse by adjusting the leakage degree of underground pipelines according to claim 1 is characterized in that: The water tank (3) with adjustable water supply direction can supply water to the automatic leakage adjustment pipeline (12) through the connecting pipe (4) in a clockwise or counterclockwise direction.

6. The test device for inducing road collapse by adjusting the degree of underground pipeline leakage according to claim 1, characterized in that: The road model (10) is made of cement mortar and simulates the actual road structure.

7. The test device for inducing road collapse by adjusting the degree of underground pipeline leakage according to claim 1, characterized in that: The connector (14) is connected to the high-strength polyvinyl chloride round tube (21) through a hole opened on the high-strength polyvinyl chloride round tube (21) and a groove (15) arranged around the hole, and epoxy resin is applied to the connection for bonding and reinforcement.

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