Device for simulating comprehensive influence of foundation pit excavation and multi-echelon precipitation on tunnel
A technology of comprehensive impact and foundation pit, which is applied in the test of foundation structure, foundation structure engineering, soil material test, etc., can solve the problem of not being able to simulate the excavation of foundation pit well, and achieves rich functions, high degree of design, and ease of use. Actions use effects
Pending Publication Date: 2021-01-15
SOUTHEAST UNIV
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[0004] In order to solve the above problems, the present invention discloses a device for simulating the comprehensive influence of foundation pit excavation and multi-step dewatering on tunnels. The device and method can simulate the stress field and seepage caused by foundation pit excavation and multi-step decompression and dewatering. The influence of the field coupling effect on the adjacent tunnel solves the technical problem that the existing test equipment cannot well simulate the comprehensive influence of foundation pit excavation and multi-step decompression and dewatering on the existing tunnel
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[0027] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the words "inner" and "outer ” refer to directions towards or away from the geometric center of a particular part, respectively.
[0028] As shown in the figure, a device for simulating the comprehensive influence of foundation pit excavation and multi-step precipitation on the tunnel according to the present invention, the five modules of the model box and the tunnel structure system, the groundwater control system, the foundation pit structure system and the measurement system are organic Combined, to re...
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The invention provides a device for simulating the comprehensive influence of foundation pit excavation and multi-echelon precipitation on a tunnel. The device mainly comprises a model box, a tunnel structure system, an underground water control system, a foundation pit structure system and a measurement system.The foundation pit structure and the tunnel structure are arranged, sandy soil is usedfor simulating a confined water layer, a confined water head is simulated by the underground water control system, and various data in the test process are collected in real time in combination with the measurement system. By means of the system, the influence of the coupling effect of foundation pit excavation and pressure reduction and precipitation on a proximity tunnel can be simulated, the influence of foundation pit multi-echelon pressure reduction and precipitation on a regional seepage field is studied, and the influence of tunnel or foundation pit local seepage on structural safety isevaluated.
Description
technical field [0001] The invention belongs to the fields of civil engineering, tunnel and underground space engineering, and environmental engineering, and in particular relates to a device for simulating the comprehensive influence of foundation pit excavation and multi-step precipitation on tunnels. Background technique [0002] my country's coastal areas along the river are mostly economically developed areas, and the urban transportation system is developing rapidly. However, the problem that the above-ground space cannot meet the expansion of transportation lines has become increasingly prominent. The development of underground space has become an inevitable trend of urban development in this area. In recent years, foundation pit engineering in coastal areas along the river has shown the characteristics of "deep, large, close, and tight", and the impact of foundation pit excavation on the surrounding environment has become more and more complicated. The groundwater le...
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IPC IPC(8): G01N33/24E02D33/00
CPCG01N33/24E02D33/00
Inventor 杨涛童立元李丹车鸿博车灿辉
Owner SOUTHEAST UNIV