Test method for soil pressure relaxation effect considering soil rheology
A technology of relaxation effect and test method, applied in the direction of applying stable tension/pressure to test the strength of materials, measuring devices, instruments, etc., can solve the problems of not considering the influence of time and earth pressure, so as to save manpower and material costs and test efficiency Effect
Active Publication Date: 2018-08-07
INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology
Since the earth pressure calculation theory (such as Rankine theory) currently used in foundation pit excavation does not consider the influence of time on earth pressure, there are limitations in practical application
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[0028] The present invention will be described in further detail below according to accompanying drawing:
[0029] according to figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Figure 6 It can be seen that a kind of soil pressure relaxation effect test method considering soil rheology includes the following steps:
[0030] 1. Conduct the active and passive earth pressure tests when the rigid retaining wall 5 has different displacement modes through a device that considers the earth pressure relaxation effect test of the rheology of the soil in advance. After the test is completed, the rigid retaining wall 5 is placed in the position where The translation state of a specific displacement or the rotation state of a specific angle; the specific displacement is 0.1 or 0.5 or 1 or 2 or 4 or 6 or 8 or 10mm, and the specific angle range is 0.01° or 0.05° or 0.1° or 0.5° or 1° or 3° or 5°.
[0031] Two, the displacement control of the rigid retaining wall 5 is carried...
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Abstract
The invention discloses a method for testing soil pressure relaxation effects with consideration of soil mass rheology. The method includes the steps of A, carrying out active and passive soil pressure tests when a rigid retaining wall is in different displacement modes; B, keeping the rigid retaining wall static constantly in the current states; C, allowing soil masses in a tank to carry out rheology along with time elapse and realizing the soil pressure relaxation effects; D, acquiring reading of a membrane pressure sensor at various moments by means of feedback of computer programs; E, acquiring time-variable results of soil pressures. A test apparatus comprises the tank, upper and lower sliders, upper and lower slide grooves, upper and lower jacks, the rigid retaining wall, a vertical bearing plate, a flexible loading water bag, the membrane pressure sensor, a displacement sensor and the like. The method has the advantages of reasonable step sequences, convenience in operation, high efficiency, economical efficiency, excellent performance and capability of meeting requirements of research on time-variable laws of soil pressures of rigid retaining walls when rheology effects of soil masses are taken into consideration.
Description
technical field [0001] The present invention relates to the technical field of architectural and civil engineering testing, in particular to a method for testing the relaxation effect of soil pressure in consideration of the rheology of the soil, and also to a device for the relaxation effect of the soil pressure in consideration of the rheology of the soil. In order to consider the time effect and the rheological effect of the soil, the active and passive earth pressure tests under different displacement modes of the rigid retaining wall are simulated at the same time. Background technique [0002] Earth pressure problems are commonly encountered in a large number of excavation of foundation pits, filling retaining walls, subway tunnels, and underground space development and utilization projects. Correctly determining earth pressure is a prerequisite for the reasonable design and smooth construction of the above projects, and it is also to ensure that the engineering project...
Claims
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IPC IPC(8): G01N3/08
CPCG01N3/08G01N2203/0075
Inventor 陈善雄戴张俊
Owner INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI