River area surface water seepage inhibition effect test device
By designing a test device for surface water seepage suppression effect of river areas, simulating the water stop effect and detecting pore water pressure, the problem of difficulty in evaluating the effect of penetration measures in the existing technology is solved, and the safety assessment and construction of shield tunnel construction is achieved guide.
Patent Information
- Application Number
- CN202420919645.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-29
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-04-29
AI Technical Summary
When constructing a shield tunnel crossing river area, it is difficult for the prior art to pre-evaluate the inhibitory effect of different anti-seepage measures, which makes it difficult to ensure safety during construction.
Design a test device for suppressing surface water seepage effect in river areas, including test chambers, soil, river channels, groundwater inlets and outlets, anti-seepage layer, pressure detectors and wireless communication systems, to simulate the water stop effect under actual construction conditions, and through pumps The water machine simulates river water flow and detects pore water pressure to evaluate seepage inhibition effect.
It has achieved the assessment of water stop effect under different construction technology conditions, provided a simple, intuitive and effective evaluation method, which can better guide and refer to actual engineering construction, and improved construction safety.
Smart Images
Figure CN222353748U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of underground engineering construction, in particular to a test device for surface water seepage suppression effect in river areas. Background Art
[0002] With the rapid development of my country's urban economy, the shield method has been widely used in the construction of urban subways and traffic tunnels due to its wide adaptability, high safety, fast construction speed, and low impact on the surrounding environment. However, my country has a vast territory, complex geological conditions, and many rivers. During the construction of urban subways, it is inevitable to cross important buildings such as houses, bridges, and rivers. Among them, crossing rivers is one of the key and difficult problems faced during the construction of shield tunnels.
[0003] When a shield tunnel passes through a river area, the surface river often has a certain hydraulic connection with the groundwater. This leads to the possibility of groundwater gushing, uneven riverbed settlement or voids if the construction process is not properly controlled. In severe cases, the shield machine may even be buried. Based on this, in actual projects, anti-seepage measures such as riverbed paving, stratum grouting reinforcement, and water-stop curtains are often used to block the hydraulic connection between the surface river and the groundwater to ensure the safety of the shield tunnel construction process. However, in actual projects, such anti-seepage measures are often concealed projects, and it is difficult to evaluate the anti-seepage effects of different measures in advance.
[0004] Therefore, the seepage suppression effects of different anti-seepage measures were evaluated, and a simulation test device for groundwater seepage suppression effects in areas where shield tunnels cross rivers was proposed, which could provide guidance and reference for actual projects. Utility Model Content
[0005] The purpose of the utility model is to solve the shortcomings existing in the prior art, such as: in actual engineering, such anti-seepage measures are often concealed projects, and it is difficult to evaluate the anti-seepage effects of different measures in advance, and a surface water seepage inhibition effect test device for river areas is proposed.
[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0007] A test device for the surface water seepage suppression effect in a river area comprises a test box, a soil body is arranged inside the test box, a river channel is opened on the soil body, a river channel outlet is fixedly connected to one side wall of the test box, and a river channel entrance is fixedly connected to the other side wall of the test box, the positions of the river channel entrance and the river channel outlet are both corresponding to the river channel, and the river channel entrance and the river channel outlet are both arranged through the side wall of the test box and communicate with the river channel, a groundwater inlet and a groundwater outlet are respectively fixedly arranged on the left and right side walls of the test box, the positions of the groundwater inlet and the groundwater outlet correspond, and the groundwater inlet and the groundwater outlet are both arranged in communication with the interior of the test box, a shield tunnel is opened on the side wall of the test box, and an anti-seepage layer is arranged inside the soil body.
[0008] Preferably, the groundwater inlet and the groundwater outlet are arranged below the river channel outlet and the river channel entrance, the anti-seepage layer is arranged below the river channel outlet and the river channel entrance, and the shield tunnel is arranged below the anti-seepage layer.
[0009] Preferably, a pressure detector is provided inside the shield tunnel, a pressure indicator gauge is fixedly provided on one side wall of the test box, and the pressure indicator gauge and the pressure detector are connected to each other by wireless communication.
[0010] Preferably, a mounting grid is provided inside the soil body, the mounting grid penetrates the inner side of the test box, the anti-seepage layer is provided inside the mounting grid, and a sealing layer is provided at the connection between the mounting grid and the test box.
[0011] Preferably, one end of the river channel inlet away from the test box is fixedly connected to a water pump via a connecting pipe.
[0012] Preferably, the river channel is arranged at an inclination relative to the test box.
[0013] Compared with the prior art, the beneficial effects of the utility model are: the design and manufacture of the device are simple, the test process is convenient and fast, easy to operate, the test principle is simple, and it can evaluate the water-stopping effect of the water-stop curtain made under different construction process conditions. The final evaluation method is simple, intuitive and effective, which can well reflect the effect of the anti-seepage measures on the suppression of groundwater seepage, and can play a good guiding and reference role in actual projects. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a three-dimensional structural schematic diagram of a test device for surface water seepage suppression effect in a river area proposed by the utility model;
[0015] Figure 2 This is a schematic diagram of the cross-sectional three-dimensional structure of a test device for the surface water seepage suppression effect in a river area proposed by the utility model;
[0016] Figure 3 The utility model is a schematic diagram of a side view of the stereoscopic structure of a test device for surface water seepage suppression effect in a river area.
[0017] In the figure: 1 test box, 2 river channel, 3 soil, 4 river channel entrance, 5 river channel outlet, 6 groundwater entrance, 7 groundwater outlet, 8 shield tunnel, 9 pressure indicator, 10 installation grid, 11 anti-seepage layer, 12 pressure detector. DETAILED DESCRIPTION
[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.
[0019] Reference Figure 1-Figure 3 A test device for the effect of surface water seepage inhibition in a river area comprises a test box 1, a soil body 3 is arranged inside the test box 1, a river channel 2 is opened on the soil body 3, a river channel outlet 5 is fixedly connected to one side wall of the test box 1, and a river channel inlet 4 is fixedly connected to the other side wall of the test box 1, the positions of the river channel inlet 4 and the river channel outlet 5 are both corresponding to the river channel 2, and the river channel inlet 4 and the river channel outlet 5 are both arranged through the side wall of the test box 1 and communicated with the river channel 2, and a groundwater inlet 6 and a groundwater outlet 7 are fixedly arranged on the left and right side walls of the test box 1, respectively, and the groundwater inlet 6 and the groundwater outlet 7 are fixedly arranged. The position of the groundwater outlet 7 corresponds to that of the test box 1, and the groundwater inlet 6 and the groundwater outlet 7 are both connected to the inside of the test box 1. A shield tunnel 8 is opened on the side wall of the test box 1, and an anti-seepage layer 11 is arranged inside the soil 3. When the device is set, the river height is h1, the groundwater burial depth is h2, and the tunnel burial depth is h3. The height of the actual groundwater level H1, the height of the foundation pit bottom H2, and the tunnel burial depth H3 of the project meet the similarity theory, that is, H1 / h1=H2 / h2=H1 / H3=C, where C is an artificially set length similarity ratio, which is determined according to the actual material size;
[0020] The groundwater inlet 6 and the groundwater outlet 7 are arranged below the river channel outlet 5 and the river channel entrance 4, the anti-seepage layer 11 is arranged below the river channel outlet 5 and the river channel entrance 4, and the shield tunnel 8 is arranged below the anti-seepage layer 11, so that the groundwater and the river channel water are both located above the anti-seepage layer 11;
[0021] A pressure detector 12 is provided inside the shield tunnel 8, and a pressure indicator 9 is fixedly provided on one side wall of the test box 1. The pressure indicator 9 and the pressure detector 12 are connected to each other by wireless communication. The pressure detector 12 and the pressure indicator 9 are matching existing devices. The pressure detector 12 includes a pore water pressure sensor for detecting pressure. The pore water pressure sensor is arranged outside the shield tunnel 8 to facilitate pressure detection. The pore water pressure value outside the shield tunnel 8 is detected by the pressure detector 9, and the detected data is displayed on the pressure indicator 9. The greater the pore water pressure, the worse the anti-seepage measure is, and the worse the groundwater seepage suppression effect is.
[0022] The soil body 3 is provided with an installation grid 10, which penetrates the inner side of the test box 1. The anti-seepage layer 11 is provided inside the installation grid 10, and a sealing layer is provided at the connection between the installation grid 10 and the test box 1. The installation grid 10 can facilitate the replacement of the anti-seepage layer 11, so as to detect the effect of different anti-seepage layers 11 on seepage suppression;
[0023] The end of the river channel entrance 4 away from the test box 1 is fixedly connected to a water pump through a connecting pipe. Water is pumped into the river channel entrance 4 by the water pump, so that the water flows through the river channel 2 to simulate natural river water; the river channel 2 is inclined relative to the test box 1 to extend the length of the river channel 2.
[0024] In the utility model, when the device is in use, water is first pumped into the river entrance 4 through a water pump to make water flow through the river 2 to simulate natural river water. Both river water and groundwater penetrate downward through the soil 3, and the anti-seepage layer 11 plays an anti-seepage effect to prevent water from passing through. At this time, the pressure detector 9 detects the pore water pressure value outside the shield tunnel 8, and at the same time replaces the anti-seepage layer 11 in the installation grid 10. The effect of different anti-seepage layers 11 on seepage suppression can be detected, and the detected data will be displayed on the pressure indicator 9. The greater the pore water pressure, the worse the anti-seepage measure.
[0025] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A test device for the effect of surface water seepage suppression in river areas, comprising a test box (1), characterized in that: A soil body (3) is arranged inside the test box (1), a river channel (2) is opened on the soil body (3), a river channel outlet (5) is fixedly connected to one side wall of the test box (1), and a river channel inlet (4) is fixedly connected to the other side wall of the test box (1), the positions of the river channel inlet (4) and the river channel outlet (5) both correspond to the river channel (2), and the river channel inlet (4) and the river channel outlet (5) both penetrate the side wall of the test box (1) and communicate with the river channel (2), a groundwater inlet (6) and a groundwater outlet (7) are fixedly arranged on the left and right side walls of the test box (1), the positions of the groundwater inlet (6) and the groundwater outlet (7) correspond to each other, and the groundwater inlet (6) and the groundwater outlet (7) are both communicated with the inside of the test box (1), a shield tunnel (8) is opened on the side wall of the test box (1), and an anti-seepage layer (11) is arranged inside the soil body (3).
2. The test device for surface water seepage suppression effect in river areas according to claim 1 is characterized in that: The groundwater inlet (6) and the groundwater outlet (7) are arranged below the river channel outlet (5) and the river channel entrance (4), the anti-seepage layer (11) is arranged below the river channel outlet (5) and the river channel entrance (4), and the shield tunnel (8) is arranged below the anti-seepage layer (11).
3. The test device for surface water seepage suppression effect in river areas according to claim 1 is characterized in that: A pressure detector (12) is arranged inside the shield tunnel (8), and a pressure indicator (9) is fixedly arranged on a side wall of the test box (1). The pressure indicator (9) and the pressure detector (12) are connected to each other by wireless communication.
4. The test device for surface water seepage suppression effect in river areas according to claim 1, characterized in that: An installation grid (10) is arranged inside the soil body (3), the installation grid (10) is arranged to penetrate the inner side of the test box (1), the anti-seepage layer (11) is arranged inside the installation grid (10), and a sealing layer is arranged at the connection between the installation grid (10) and the test box (1).
5. The test device for surface water seepage suppression effect in river areas according to claim 1, characterized in that: One end of the river channel inlet (4) away from the test box (1) is fixedly connected to a water pump via a connecting pipe.
6. The test device for surface water seepage suppression effect in river areas according to claim 1, characterized in that: The river channel (2) is arranged at an inclination relative to the test box (1).