Three-dimensional model tunnel test device for simulating excavation settlement of tunnels with cavities
A technology of tunnel excavation and three-dimensional model, which is applied in the direction of soil material testing and material inspection products, etc. It can solve problems such as test failure, soil collapse in the model box, and soil disturbance, so as to save test time, reduce disturbance, high precision effect
Active Publication Date: 2020-04-10
OCEAN UNIV OF CHINA
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This process often causes great disturbance to the soil, and may even cause the soil in the model box to collapse, resulting in the failure of the test
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[0026] In order to further elaborate the technical means and effects that the present invention adopts for reaching the intended invention purpose, below in conjunction with the accompanying drawings and preferred embodiments, the specific implementation, structure, features and effects of the present invention are described in detail as follows:
[0027] A three-dimensional model tunnel test device for simulating the excavation and settlement of tunnels containing cavities, such as Figure 1 to Figure 3 As shown, it includes a box body 1, a large air bag 2, an air-drying device 3, several small air bags and a settlement displacement measuring device 4.
[0028] refer to figure 1 , the soil body of the tunnel is placed in the box body 1. The back, double sides and bottom of the box body 1 are made of stainless steel, and the front is made of tempered glass for easy observation. A size measuring ruler is installed on the left side of the front of the box body 1 to measure the...
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Abstract
The invention discloses a three-dimensional model tunnel test device for simulating excavation settlement of a tunnel containing a cavity stratum, and relates to the field of three-dimensional test models for tunnel excavation in geotechnical engineering. The device comprises: a box body for placing a soil body; a large air bag arranged in the box body through a telescopic device and used for simulating the change of the buried depth of the tunnel; an air drying device arranged on the box body and used for accelerating air drying of the soil body in the box body; a plurality of small air bagsarranged in the box body and are used for forming a stratum cavity; and a settlement displacement measuring device arranged on the box body and used for measuring the height of the soil body in the box body. The device has the beneficial effects that air-drying consolidation of soil in the box body can be accelerated, and a large amount of test time can be saved; the measurement is more convenientand simpler, the interference of the external environment can be resisted, and the precision is higher; tunnel burial depth position adjustment and comparison tests are realized; disturbance to surrounding soil is reduced as much as possible, and the engineering environment in real tunnel construction is simulated to the maximum extent.
Description
technical field [0001] The invention relates to the field of three-dimensional test models for tunnel excavation in geotechnical engineering, in particular to a three-dimensional model tunnel test device for simulating the excavation and settlement of tunnels in strata containing cavities. Background technique [0002] With the development of my country's economy and society and the advancement of urbanization, the country's demand for underground transportation construction is increasing. Rail transit facilities such as subways and light rails have been built in various places. Urban subway tunnels and a large number of highway and railway tunnel construction requirements have put forward many challenges to the construction technology of geotechnical engineering tunnels. At present, the main methods of tunnel construction are shield tunneling method, mining method, pipe jacking method, etc. The scientific research and engineering evaluation methods before and after tunnel ...
Claims
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IPC IPC(8): G01N33/24
CPCG01N33/24
Inventor 刘涛孙文景张瑾苏秀婷
Owner OCEAN UNIV OF CHINA