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Model differential settlement controlling device of geotechnical centrifuge test

A geotechnical centrifuge, model difference technology, applied in measuring devices, using stable tension/pressure testing material strength, instruments, etc., can solve the problem of not being able to accurately grasp the impact of uneven settlement of embankment filling and uneven deformation of roadbed surface. It can solve the problems of law, uneven deformation of model embankment filling, poor controllability of differential deformation of foundation, etc., to achieve the effect of compact structure, small space occupation, and avoidance of oil leakage.

Inactive Publication Date: 2013-08-14
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • 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 Shown, the first kind of specific embodiment of the present invention is, a kind of model differential settlement control device of geotechnical centrifuge test, and it is composed of: one side of the bottom of the model box 100 is fixed with two rows of support piers 301, 302, two columns The supporting pier 301, 302 top is supported with a fixed plate 201; the other side of the bottom of the box is fixed with two rows of lifts 401, 402, and the flanges on the top of the two rows of lifts 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.

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

Embodiment 2

[0030] Figure 4~6 As shown, the second specific implementation of the present invention is a model differential settlement control device for geotechnical centrifuge test, which consists of two columns of support piers 301, 302 fixed on one side of the bottom of the model box 100, two columns of The supporting pier 301, 302 top is supported with a fixed plate 201; the other side of the bottom of the box is fixed with two rows of lifts 401, 402, and the flanges on the top of the two rows of lifts 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. In this embodiment, an inclined plate 203 is also provided between the fixed plate 201 and th...

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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 a geotechnical centrifugal model test. Background technique [0002] The subgrade of railways and highways is a belt-shaped structure. Differential settlements are prone to occur at the junction of the embankment and the abutment, the connection between the subgrade and the lateral structure, the part where the foundation soil layer changes greatly, and the place where the foundation treatment measures change, resulting in the rail surface The unevenness of the vehicle and the unevenness of the road surface cause severe vibration when the vehicle passes at high speed, which affects the ride comfort and driving stability, and even endangers driving safety in serious cases. This differential settlement is mainly caused by the uneven deformation of the foundation. Through the experimental study of the transfer law of t...

Claims

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Application Information

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Patent Type & Authority Patents(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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