Testing apparatus used for simulating foundation pit three-dimensional seepage caused by combined effects of separating-lowering-pouring and ground deformation mechanism

Abstract

The invention provides a testing apparatus used for simulating foundation pit three-dimensional seepage caused by combined effects of separating-lowering-pouring and ground deformation mechanism. The testing apparatus is used for solving a problem of lack of experiment equipment, which is used for simulating foundation pit three-dimensional seepage caused by combined effects of separating-lowering-pouring and ground deformation mechanism, and systematic researches on relating data and mechanism at present. The testing apparatus comprises a model casing, geotextile, permeable steel plates, underground diaphragm walls, a pumping well, a recharge well, measuring devices and data collecting devices. The model casing is divided into a water zone, a soil zone and a foundation pit zone; the measuring devices comprise a flowmeter, a stratum displacement meter, a water manometer, a contact electric displacement meter, a pore water pressure gauge, and the like, and is capable of realizing accurate measurement on flow displacement pressure; and the data collecting devices are connected with the measuring devices. The testing apparatus is capable of realizing researches on the mechanism of pumping depression cone and recharge lifting underground water level three-dimensional seepage effects, and the relationship between ground deformation and groundwater table fluctuation.

Description

technical field [0001] The invention relates to the fields of geological engineering, geotechnical engineering, urban hydrogeology and environmental geology, in particular to a test device for simulating the three-dimensional seepage of foundation pits and formation deformation mechanisms under the combined action of isolation-drop-irrigation. Background technique [0002] At present, there is no relevant test device in the field of research on the three-dimensional seepage law and formation deformation mechanism of foundation pits under the combined action of isolation-dropping-irrigation; The groundwater level in the foundation pit is often lowered below the excavation surface by means of dewatering; sometimes the ground connection wall cannot completely block the hydraulic connection inside and outside the foundation pit. Therefore, as the groundwater level inside the foundation pit decreases, the groundwater level outside the foundation pit is also affected to varying de...

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Problems solved by technology

[0003] In view of the above situation, in order to overcome the defects of existing test methods, the purpose of the present invention is to provide a test device for simulating three-dimensional seepage and formation deformation mechanism of foundation pits under the joint action of isolation-drop-irrigation, so as to solve the current problem of simulating isolation-drop-irrigation. The 3D seepage law of the foundation pit under the joint action and the lack of experimental equipment for the simulation of the formation deformation mechanism and the lack of systematic research on relevant data and mechanisms

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