Model test device and method for cylinder side pressure test in loose medium

A model test device, the technology of lateral pressure, applied in the direction of measuring device, force/torque/work measuring instrument, instrument, etc., can solve the problem of not finding literature reports and so on

Inactive Publication Date: 2019-09-06
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the experimental device and method used for testing the earth pressure of the cylindrical structure at home and abroad have not found any similar bibliographical reports with the present invention

Method used

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  • Model test device and method for cylinder side pressure test in loose medium
  • Model test device and method for cylinder side pressure test in loose medium
  • Model test device and method for cylinder side pressure test in loose medium

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Embodiment Construction

[0061] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0062] Such as Figure 1-Figure 6 As shown, a model test device for cylinder side pressure testing in loose media, the device includes: splicing cylinder 1, central control shaft 2, directional chassis 3, sealing rubber belt 4, sliding roller 5, miniature soil Pressure sensor 6, wherein:

[0063] The central control shaft 2 is divided into upper, middle and lower sections, wherein: the upper section 10 of the central control shaft and the lower section 12 of the central control shaft are cylinder...

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Abstract

The invention provides a model test device and a method for a cylinder lateral pressure test in a loose medium. The device comprises a directional chassis capable of accurately controlling a displacement direction, a cylinder structure jointed by T-shaped arc plats, a center control shaft with an inverted frustum of a cone in a middle section, rubber belts for sealing gaps and sliding rollers for reducing friction of a contact surface. The method is based on the device. A horizontal thrust with N times a vertical loading value can be generated with a small vertical loading force, and uniform distribution along the radial direction is ensured; tiny radial displacement can be multiplied for N times for measurement; active and passive limit earth pressure of a cylinder structure with a large diameter can be measured, and the axisymmetric limit equilibrium theory of the loose medium can be verified; and the earth pressure change law of a cylinder structure such as a circular foundation pit, a mine vertical shaft and a highway vertical shaft during a construction process can be simulated, and basis is provided for engineering design and support.

Description

technical field [0001] The invention relates to an indoor model experiment equipment and method for axisymmetric problems in loose media, in particular to an active and passive earth pressure testing device for cylindrical structures in loose media and a method for verifying the axisymmetric limit theory of loose media. Background technique [0002] The axisymmetric limit equilibrium theory of loose media is an important theoretical branch of soil mechanics. As a basic theory, it has not been fully answered. The different approximate solutions proposed by many scholars need to be scientifically verified and screened. Since the axially symmetrical actual engineering structures, such as circular foundation pits, mine shafts, etc., are in a non-limit state during construction and normal use, the measured data cannot verify the mechanical theory of the limit state, so indoor tests are particularly important. Uniform radial loading, uniform displacement, and accurate measurement ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L5/00
Inventor 熊国军王建华叶冠林
Owner SHANGHAI JIAOTONG UNIV
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