Physical model test device and test method for testing stability of landslide
A landslide physical model, physical model technology, applied in the direction of measuring device, soil material testing, using optical device, etc., can solve the problems of slow change, uncontrollable water pressure, small change gradient of pore water pressure, etc., to achieve pore water pressure The effect of large gradient range, high pore water pressure control accuracy, and strong reliability
Active Publication Date: 2019-11-12
HOHAI UNIV
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[0005] Purpose of the invention: Aiming at problems such as small pore water pressure change gradient, slow change, and uncontrollable water pressure in the existing landslide stability simulation test process, the present invention provides a physical model test device for testing landslide stability, and provides A method for testing the stability of landslides using the test device, testing the stability of landslides under different pore water pressures
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[0021] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.
[0022] Such as figure 1 , a kind of physical model test device of testing landslide stability of the present invention, comprises test groove 1, and test groove 1 piles slide bed 2, slide belt 3 and slide body 5 upwards from the bottom, is used for simulating actual landslide, and test groove 1 There is a laser rangefinder 10 inside, which is used to measure and record the displacement variation of the slide body 5 during the landslide failure process; the device also includes a pore water pressure loading system, a pore water pressure measurement system, and a pore water pressure measurement system for realizing landslide pore water pressure changes. The pore water pressure distribution system 4, wherein the pore water pressure loading system is connected to the pore water pressure distribution system 4, and the pore water pressure distributi...
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The invention discloses a physical model test device and a test method for testing the stability of a landslide. The test device comprises a test slot, and further comprises a pore water pressure loading system, a pore water pressure measurement system embedded into a sliding belt, and a pore water pressure distribution system for realizing the change of pore water pressure of the landslide, wherein a sliding bed, the sliding belt and a sliding body are stacked in the test slot, and a laser range finder is arranged inside the test slot for measuring and recording the displacement variation ofthe sliding body during the landslide damage process; and the pore water pressure loading system is connected to the pore water pressure distribution system. The method for testing the stability of the landslide includes the following steps of: stacking a physical model of the landslide in the test slot, adjusting the water pressure value of the pore water pressure loading system to a preset valuep0, and loading the water pressure into the sliding belt until the pore water pressure in the sliding belt is consistent with a preset value and maintained; increasing the water pressure loading value step by step until the physical model of the landslide is destroyed; and quantitatively evaluating the stability of the landslide by calculating the safety abundance value of the landslide.
Description
technical field [0001] The invention relates to a physical model test device, in particular to a physical model test device and a test method for testing landslide stability, and belongs to the field of geological disaster model tests. Background technique [0002] Water is an important factor leading to landslide instability. Water accumulates in the landslide through infiltration, which increases the pore water pressure in the landslide, reduces the shear strength of the landslide, and leads to the occurrence of the landslide. Therefore, it is very important to study the influence of pore water pressure changes on landslide stability. [0003] Indoor physical model test is an effective means to study the mechanism of landslides. At present, many scholars realize the change of landslide pore water pressure through rainfall or reservoir water level changes. The disadvantages mainly include the following aspects: first, the gradient of pore water pressure change in the slidi...
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IPC IPC(8): G01N33/24G01L11/00G01B11/02
CPCG01B11/02G01L11/00G01N33/24
Inventor 王环玲姜自华徐卫亚周行健王如宾苏佳盼马行生
Owner HOHAI UNIV