Model differential settlement controlling device of geotechnical centrifuge test

A technology of geotechnical centrifuge and model difference, applied in the direction of measuring device, using stable tension/pressure testing material strength, instruments, etc., can solve the inability to accurately grasp the influence of uneven deformation of embankment filling and uneven settlement of subgrade surface Regularity, uneven deformation of model embankment fill, poor controllability of foundation differential deformation, etc., to achieve the effect of compact structure, small space occupation, and avoiding oil leakage

Inactive Publication Date: 2012-02-22
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used simulation method for foundation differential settlement in geotechnical centrifugal model tests is: first fill model foundations with different strengths at the bottom of the model box, then place the model embankment on the model foundation, and apply centrifugal force to the model in the model box to cause different The model foundation with high strength produces differential deformation, which in turn causes uneven deformation of the model embankment fill and uneven settlement of the subgrade surface
Due to the poor controllability of the differential deformation of the model foundation with different strengths, it is impossible to accurately grasp the influence of the differential deformation of the foundation on the uneven deformation of the embankment filling and the uneven settlement of the subgrade surface

Method used

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  • Model differential settlement controlling device of geotechnical centrifuge test
  • Model differential settlement controlling device of geotechnical centrifuge test
  • Model differential settlement controlling device of geotechnical centrifuge test

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Embodiment 1

[0025] Figure 1~3 It is shown that the first specific embodiment of the present invention is a model differential settlement control device for geotechnical centrifuge test, which consists of two rows of supporting piers 301, 302 fixed on one side of the bottom of the model box 100, two rows The upper part of the supporting piers 301 and 302 is supported by a fixed plate 201; the other side of the bottom of the box is fixed with two rows of elevators 401, 402, and the upper flanges of the two rows of elevators 401, 402 are fixed with a lifting plate 202; the fixed plate 201 and The embankment model 700 is filled on the lifting plate 202; the elevators 401 and 402 are connected to the stepping servo motor 500 through the steering box 600 installed at the bottom of the model box 100, and the stepping servo motor 500 is electrically connected to the external control system of the geotechnical centrifuge.

[0026] figure 2 and figure 1 , image 3 It is shown that the specific struct...

Embodiment 2

[0030] Figure 4~6 It is shown that the second specific embodiment of the present invention is a model differential settlement control device for geotechnical centrifuge test, which consists of two rows of supporting piers 301, 302 fixed on one side of the bottom of the model box 100, two rows The upper part of the supporting piers 301 and 302 is supported by a fixed plate 201; the other side of the bottom of the box is fixed with two rows of elevators 401, 402, and the upper flanges of the two rows of elevators 401, 402 are fixed with a lifting plate 202; the fixed plate 201 and The embankment model 700 is filled on the lifting plate 202; the elevators 401, 402 are connected to the stepping servo motor 500 through the steering box 600 installed at the bottom of the model box 100, and the stepping servo motor 500 is electrically connected to the external control system of the geotechnical centrifuge. An inclined plate 203 is also provided between the fixed plate 201 and the lif...

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Abstract

A model differential settlement controlling device of a geotechnical centrifuge test. Composition of the model differential settlement controlling device is as below: two rows of support piers are fixed on one side of a model box bottom, and a dead flat on the two rows of support piers is supported by the support piers; two rows of elevators are fixed on the other side of the box bottom, and flange plates on upper parts of the elevators are fixed with a lifting plate; an embankment model is filled on the dead flat and the lifting plate; and elevators are connected with a step servo motor through a steering box arranged on the model box bottom, and the step servo motor is electrically connected with an external control system of the geotechnical centrifuge. According to the apparatus, accurate control of model differential settlement can be realized under a centrifuge running state, so as to master transmission and diffusion rules of nonuniform deformation of foundation in embankment soil filling and influences of the nonuniform deformation of foundation on characteristics of road bed nonuniform settlement, so as to provide reliable test basis for improving uniform transitioning technology of different structures in railway and road engineering.

Description

Technical field [0001] The invention relates to a geotechnical centrifugal model test device, in particular to a model differential settlement control device for the geotechnical centrifugal model test. Background technique [0002] The railway and highway subgrade is a kind of belt-shaped structure. At the junction of the embankment and abutment, the junction of the subgrade and the lateral structure, the place where the foundation soil layer changes greatly, and the foundation treatment measures change, it is easy to produce differential settlement, resulting in track surface The unevenness of the road surface and the unevenness of the road cause severe vibration when the vehicle passes at high speed, which affects the comfort of riding and the stability of driving, and even endangers driving safety in severe cases. This differential settlement is mainly caused by the uneven deformation of the foundation. The transmission law of the uneven deformation of the foundation in the e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/02G01N3/08
Inventor 罗强陈虎张良杨广伟万小全冉涛魏永权张立祥陈坚刘刚
Owner SOUTHWEST JIAOTONG UNIV
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