Tunnel monitoring test device in closed high-pressure karst water storage environment

Abstract

The utility model relates to the field of tunnel monitoring tests, and particularly discloses a tunnel monitoring test device in a closed high-pressure karst water storage environment, which comprises a test pool, a simulation steel frame, a simulation pipeline and a simulation tunnel, the simulation steel frame comprises a bottom plate, an arc-shaped frame and a plurality of side plates, the arc-shaped frame is arranged on the bottom plate and forms a tunnel channel, and a simulation tunnel can be installed in the tunnel channel; the simulation steel frame can be filled with filler, during filling, the middle of the upper portion of the simulation tunnel is filled with a permeable material, the two sides of the upper portion of the simulation tunnel are filled with non-permeable materials, the side plates are fixedly installed on the periphery of the bottom plate, the simulation pipeline comprises a rubber hose, and a plurality of overflow holes are formed in the pipe wall of the simulation pipeline. The utility model aims to solve the technical problem of how to simulate a closed high-pressure karst water storage environment.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of tunnel monitoring test, specifically disclose closed high pressure karst water storage environment under tunnel monitoring test device. BACKGROUND

[0002] Five Fu tunnel, iron Fengshan tunnel has the following characteristics: one is scale length, two tunnel monomer scale length all exceed 6000m, belong to the typical long highway tunnel engineering, two is through the complex geological conditions, closed high pressure karst water storage structure environment is remarkable. Two tunnels respectively pass through false horn mountain anticline and iron Fengshan anticline, the lithology in the core part is mainly soluble rock such as limestone, dolomite, conglomerate, and the periphery is sandstone, shale and other non-soluble rock, and the soluble rock is held by non-soluble rock, forming a closed water storage structure. There are 82 various forms of karst such as sinkhole, cave and depression in the Five Fu tunnel area, the vertical drop of groundwater runoff is more than 300m, the maximum water pressure after reduction is about 2.4MPa, and the predicted maximum water inflow is about 390,000m3 / d. Closed water storage structure with high pressure and rich water is easy to induce large-scale water and mud inrush construction risk.

[0003] For the tunnel engineering under closed high pressure karst water storage environment, the change rule of water pressure outside the tunnel needs to be studied, the limited discharge control standard is determined according to the change rule and the groundwater system and surface environment protection requirements, and finally the reasonable support structure design of the tunnel is determined. Through this series of research, the theory and guidance basis are provided for the design of high permeability pressure tunnel in closed karst water storage environment. In the research process, the tunnel monitoring test needs to simulate the closed high pressure karst water storage environment, so the related test device is needed. UTILITY MODEL CONTENT

[0004] Therefore, the utility model aims at providing a tunnel monitoring test device under closed high pressure karst water storage environment to solve the technical problem of how to simulate closed high pressure karst water storage environment.

[0005] To achieve the above purpose, the utility model provides the following technical scheme:

[0006] The utility model provides a kind of closed high-pressure karst water storage environment under tunnel monitoring test device, including test pool, simulation steel frame, simulation pipeline and simulation tunnel;The simulation steel frame includes bottom plate, arc frame and several side plates, the arc frame is arranged on bottom plate and forms tunnel passage, simulation tunnel can be installed in the tunnel passage;Simulation steel frame can be filled with filler, when filling, simulation tunnel upper middle part is filled with water-permeable material, simulation tunnel upper two sides are filled with non-water-permeable material, the side plate is fixedly installed around bottom plate, the simulation pipeline includes rubber hose, and a plurality of overflow holes are formed on the pipe wall of the simulation pipeline.In the scheme, a kind of test equipment is mainly provided, since a large amount of water is needed to simulate water storage environment during the whole test, so test pool is separately provided to prevent water overflow.Simulation steel frame and simulation pipeline are used to simulate geological environment, i.e.high-pressure karst water storage environment, wherein simulation pipeline can be installed on simulation steel frame, since simulation pipeline is rubber hose, so simulation pipeline can be bent and wound on simulation steel frame to simulate different path karst water flow channel.The bottom of entire simulation steel frame is sealed, so when filling filler into it, filler will not leak out, and different fillers can be filled, and after test is completed, filler can also be cleaned out for next test.Simulation tunnel can be installed on the inner bottom of simulation steel frame by cast-in-place method or assembly method to form entire tunnel structure.The overflow holes on simulation pipeline are used to simulate high water pressure environment, when water pressure in simulation pipeline is increased, water pressure can affect filler in simulation steel frame to simulate real environment.

[0007] Optionally, a plurality of metal rings are arranged on the rubber hose, a plurality of rod frames are arranged on the arc frame and the side plates in a longitudinal and transverse manner, hooks are arranged on the rod frames, and the hooks can be hung on the metal rings.By using the scheme, the hooks are arranged on the rod frames, and the rubber hose is fixed by the hooks, so that the shape of the rubber hose can be changed arbitrarily to change the shape of simulated karst water flow channel.

[0008] Optionally, the rod frames are adhered and fixed on the side plates and the arc frame, and the rod frames are made of plastic.The rod frames are adhered and fixed, which is convenient for removing filler.

[0009] Optionally, after the simulation steel frame and the simulation tunnel are installed, filler can be filled in the simulation steel frame, and the filler includes rock blocks, sand and soil.

[0010] Optionally, a plurality of water outlets are formed on the side plates.The water outlets are used for draining water in the simulation pipeline.

[0011] Optionally, a plurality of sensors are arranged on the simulation tunnel.

[0012] Optionally, the sensors include pressure-temperature compound sensors, strain gauges and osmotic pressure sensors.

[0013] The working principle and beneficial effects of the present scheme are that:

[0014] The closed high-pressure karst water storage environment is a special geological environment, the core lithology in the longitudinal middle part of the tunnel is mainly soluble rock, and the lithology on both sides of the longitudinal tunnel is mainly non-soluble rock, so the water permeability of the rock in the longitudinal middle part of the tunnel is strong, a large amount of water is gathered, and the water permeability of the rock on both sides of the longitudinal tunnel is weak, which causes the water in the longitudinal middle part of the tunnel to be unable to be discharged, thereby forming a water gathering condition, to simulate the closed high-pressure karst water storage environment, and to provide a theoretical and guiding basis for the design of the high-permeability pressure tunnel in the closed karst water storage environment. In the present scheme, a complete tunnel structure is formed by simulating a steel frame, a simulated pipeline and a simulated tunnel, then filler is filled in the simulated steel frame, when filling, water-permeable materials are used on both sides of the tunnel, and water-permeable materials are used in the middle part of the tunnel, at the same time, in order to ensure the simulation authenticity, a liquid filler with strong sealing performance can also be cast on the filler in the middle part of the tunnel, then water is passed through the simulated pipeline, and the high water pressure environment is simulated by increasing the water pressure. At the same time, the filler components in the simulated steel frame can also be changed to simulate different geological conditions. Then various sensors are installed on the simulated tunnel, so that the real environment can be simulated, and the situation of the tunnel under high water pressure environment can be detected through the sensors.

[0015] Other advantages, objects and features of the present application will be apparent to those skilled in the art from the following description, and to a certain extent, will be apparent from the study of the following text, or can be taught from the practice of the present application. The objects and other advantages of the present application can be achieved and obtained through the following description. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The structural schematic diagram of the embodiment is shown in the figure;

[0017] Figure 2 The structural schematic diagram of the simulated steel frame and the simulated tunnel is shown in the figure;

[0018] Figure 3 The structural schematic diagram of the simulated pipeline and the rod frame is shown in the figure.

[0019] The marks in the figure are as follows: test pool 1, simulated steel frame 2, bottom plate 3, simulated tunnel 4, arc-shaped frame 5, rod frame 6, simulated pipeline 7, water outlet hole 8, side plate 9, sensor 10, rubber hose 11, metal ring 12, hook 13. DETAILED DESCRIPTION

[0020] The following will be further described in detail through specific embodiments:

[0021] EMBODIMENT

[0022] The utility model relates to a kind of tunnel monitoring test device under closed high-pressure karst water storage environment, combine Figures 1-3 As shown in the figure, including test pool 1, simulation steel frame 2, simulation pipeline 7 and simulation tunnel 4.

[0023] Simulation steel frame 2 includes bottom plate 3, arc frame 5 and several side plates 9. Arc frame 5 is welded on bottom plate 3 and forms the tunnel passage of arc shape, and the tunnel passage shape is same with tunnel in prior art, and simulation tunnel 4 can be installed in the tunnel passage. Side plate 9 is fixedly installed around bottom plate 3 by welding, and after side plate 9, bottom plate 3 and simulation tunnel 4 are installed, the whole simulation steel frame 2 bottom is sealed, and then filling can be carried out. A plurality of rod frames 6 are arranged on arc frame 5 and side plate 9 in a crisscross manner, hooks 13 are arranged on rod frame 6, rod frame 6 is installed on side plate 9 and arc frame 5 by sticking, rod frame 6 is made of plastic, and the thickness of rod frame 6 is less than 0.5 cm. Water outlet hole 8 is formed in side plate 9.

[0024] Simulation pipeline 7 includes rubber hose 11, and a plurality of overflow holes are formed in the pipe wall of simulation pipeline 7. A plurality of metal rings 12 are arranged on rubber hose 11, and metal ring 12 can be hung on hook 13 of rod frame 6. Figure 1 In the specific embodiment, simulation pipeline 7 is only randomly drawn, and does not represent the fixed number and fixed arrangement track. Because rod frame 6 is arranged by sticking, the length, arrangement position and number of rod frame 6 can also be determined according to the length, number and track of simulation pipeline 7.

[0025] After simulation steel frame 2 and simulation tunnel 4 are installed, filling can be filled in simulation steel frame 2, and the filling includes rock block, sand and soil. A plurality of water outlet holes 8 are formed in side plate 9.

[0026] Simulation tunnel 4 can be preformed by concrete or cast in situ. A plurality of sensors 10 are arranged on simulation tunnel 4. Sensor 10 includes pressure-temperature composite sensor 10, strain gauge and osmotic pressure sensor 10.

[0027] In specific implementation:

[0028] Firstly, the simulation tunnel 4 is installed, which can be prefabricated or cast in situ, and is preferably prefabricated and then sealed. Then, the rod frame 6 is adhered on the arc-shaped frame 5 and the side plate 9, the simulation pipeline 7 is arranged after the rod frame 6 is adhered, the number and specific direction of the simulation pipeline 7 can be selected according to the test requirements, the metal ring 12 on the simulation pipeline 7 is hung on the hook 13 on the rod frame 6, and then the simulation steel frame 2 is filled, the filler is selected according to the test requirements, the entire filler is the soil environment in the test after being filled, when filling, the middle part of the tunnel is filled first, and the filler with strong water permeability is selected, then a layer of filler with weak water permeability is covered on the filler by pouring and spraying, and then the filling of both sides of the tunnel is performed. After filling is completed, water is supplied into the simulation pipeline 7, the water pressure is adjusted after water supply is completed to simulate a high-pressure environment. Then, the simulation test can be completed by observing various conditions of the simulation tunnel 4 through various sensors 10.

[0029] The above is only an embodiment of the present application, and the well-known specific structure and characteristics and other common knowledge in the scheme are not described in detail. It should be pointed out that, for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should also be considered as the protection range of the present application, and these will not affect the effect and practicability of the present application.

Claims

1. A closed-loop tunnel monitoring test device for high-pressure karst water storage environment, characterized in that: Including test pool, simulation steel frame, simulation pipeline and simulation tunnel, the simulation steel frame includes bottom plate, arc-shaped frame and several side plates, the arc-shaped frame is arranged on the bottom plate and forms a tunnel passage, the simulation tunnel can be installed in the tunnel passage, the filler can be filled on the simulation steel frame, when filling, the water permeable material is filled in the upper middle part of the simulation tunnel, the non-water permeable material is filled on both sides of the simulation tunnel, the side plates are fixedly installed around the bottom plate, the simulation pipeline includes rubber hose, and a plurality of overflow holes are formed in the pipe wall of the simulation pipeline.

2. The tunnel monitoring test device in a closed high-pressure karst water storage environment according to claim 1, characterized in that: A plurality of metal rings are arranged on the rubber hose, a plurality of rod frames are arranged on the arc-shaped frame and the side plates in a longitudinal and transverse manner, hooks are arranged on the rod frames, and the hooks can be hung on the metal rings.

3. The tunnel monitoring test device in a closed high-pressure karst water storage environment according to claim 2, characterized in that: The rod frame is installed on the side plate and the arc-shaped frame in a sticky manner, and the rod frame is made of plastic.

4. The tunnel monitoring test device in a closed high-pressure karst water storage environment according to claim 3, characterized in that: After the simulation steel frame and the simulation tunnel are installed, the filler can be filled in the simulation steel frame, and the filler includes rock blocks, sand and soil.

5. The tunnel monitoring test device in a closed high-pressure karst water storage environment according to claim 4, characterized in that: A plurality of water outlets are formed in the side plates.

6. The tunnel monitoring test device in a closed high-pressure karst water storage environment according to claim 5, characterized in that: A plurality of sensors are arranged on the simulation tunnel.

7. The tunnel monitoring test device in a closed high-pressure karst water storage environment according to claim 6, characterized in that: The sensors include pressure-temperature composite sensors, strain gauges and osmotic pressure sensors.

Images