A simulation device for pumping action of tunnel base structure
A technology for simulating devices and bases, applied in measuring devices, testing of machines/structural components, instruments, etc., can solve the problems of unable to simulate the principle and law of dynamic loss of basement surrounding rock particles, distortion, single form, etc.
Inactive Publication Date: 2018-07-17
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology
Existing methods and systems are usually used in road tunnels and railway tunnels where the dynamic load of high-speed trains is small, and it is impossible to consider and simulate the pumping effect of the base structure when the tunnel bears a large axle load and high traffic density, especially the bottom of the train under dynamic action. The influence law of the alternation of surrounding rock and groundwater, and its existing methods and systems cannot simulate the defect development of the bottom surrounding rock under the action of pumping and the loss of surrounding rock particles during the long-term operation of the tunnel
[0005] At present, there is still a lack of simulation devices for the pumping effect of the tunnel base structure in China. The design and simulation of the hydrostatic pressure situation is simple, and the simulated hydrostatic pressure has a single form. The simulation of the pumping effect under the dynamic load of the base structure is greatly restricted. At the same time, the dynamic effect on the base structure cannot be considered in the simulation process, and the impact of heavy-duty trains with large axle loads is ignored. There are varying degrees of distortion in the dynamic action of the groundwater on the base structure of heavy-duty railway tunnels that are currently being vigorously developed in China; Unable to simulate the principle and law of basement surrounding rock particles in water-rich formations being lost with groundwater dynamics
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[0039] The present invention is further described below in conjunction with specific embodiment, and specific embodiment is the further description of the principle of the present invention, does not limit the present invention in any way, and the identical or similar technology of the present invention all does not exceed the scope of protection of the present invention.
[0040] combine Figure 1 to Figure 4 .
[0041]As shown in the figure, the tunnel base structure pump suction simulation device includes the main test box 1, the left water storage tank 2, the right water storage tank 3, the train load simulation device 4, the high water tank 9 and the test bench 12;
[0042] The left water storage tank 2 and the right water storage tank 3 are respectively fixed on both sides of the main test box 1, the main test box 1 is fixed on the test bench 12, the test bench 12 is fixed on the ground, and the train load simulation device 4 is fixed on the main test box 1, the high-le...
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The invention discloses a tunnel substrate structure pump suction effect simulation device which comprises a main body test box, a left water storage tank and a right water storage tank which are fixedly arranged at two sides, and a communication channel arranged on a common wall. A train load simulation device is fixed on the communication channel. A high level water tank is suspended by a pulley and detachably communicates with the left water storage tank. The lower part of the main body test box bears a surrounding rock simulation material, the upper paart bears a substrate structure simulation material, the bonding crack of the two materials is at the outlet of the communication channel, and a detection apparatus is buried in the bonding crack. According to the device, different hydrogeologic conditions of a tunnel substrate structure are simulated, the structure comprises a water-rich stratum, a water containing stratum and a waterless stratum, the simulation of 'structure-moving load-surrounding rocks-water' pump suction effect under a train moving load effect is realized when the substrate surrounding rocks of the tunnel substrate structure under different hydrogeologic conditions have defects, the power effect of a train to the tunnel substrate structure is researched, and thus the safety and economy of the tunnel substrate structure are guaranteed.
Description
technical field [0001] The invention belongs to the technical field of design and construction of railway tunnels, in particular to a model test device applied to the pumping action of base structures under the actions of trains, surrounding rock defects and underground hydrodynamic loads during the tunnel operation stage. Background technique [0002] The pumping effect means that when the tunnel base structure is affected by the large load of the train, it will have a dynamic effect on the groundwater between the base structure and the surrounding rock. The occurrence and development of rock defects will affect the mechanical performance and long-term safety and stability of the base structure. Insufficient knowledge of the pumping effect of the base structure will pose a heavy threat to the long-term safety and stability of the tunnel. [0003] There is a lack of in-depth understanding of the formation and development of the pumping effect of this tunnel basement structur...
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IPC IPC(8): G01M10/00
CPCG01M10/00
Inventor王明年李自强于丽华阳刘大刚童建军
OwnerSOUTHWEST JIAOTONG UNIV