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Retaining wall instability model test device and installation and test method

A model test device and retaining wall technology, applied in the fields of railway engineering, geotechnical engineering, and road engineering, to achieve the effect of easy disassembly and handling, and convenient processing

Inactive Publication Date: 2014-12-10
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no corresponding test device and test method

Method used

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  • Retaining wall instability model test device and installation and test method
  • Retaining wall instability model test device and installation and test method
  • Retaining wall instability model test device and installation and test method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] (1) Model installation. The filler is sandy soil, the control degree of compaction is 90%, and the water level is 1.0m

[0067] (2) Use a portable frequency measuring instrument to read the initial frequency of the lateral earth pressure cell of the rotating retaining wall.

[0068] (3) The distance between the settlement retaining wall and the chassis remains unchanged. Control the oil return of the oil cylinder through the controller to make the right retaining wall rotate 5゜outwardly around the axis

[0069] (4) Use a portable frequency measuring instrument to read the frequency of the lateral earth pressure cell of the rotating retaining wall, and convert it into earth pressure, and analyze the change of lateral earth pressure when the retaining wall is tilted outward.

[0070] (5) By controlling the oil return of the oil cylinder, the external rotation angles of the rotating retaining wall around the axis are 10゜, 15゜, and 20゜. Repeat step (4) to study the latera...

Embodiment 2

[0072] (1) Model installation. The filling is made of silt, the control degree of compaction is 85%, and the water level is 1.5m

[0073] (2) Use a portable frequency measuring instrument to read the initial frequency of the lateral earth pressure cell of the rotating retaining wall.

[0074] (3) Control the oil cylinder to keep the vertical plate of the rotating retaining wall vertically still. Install dial gauges at heights of 0m, 0.2m, 0.4m, 0.6m, and 0.8m from the chassis outside the settlement retaining wall, and read the initial readings.

[0075] (4) Tighten the upper nut of the stud bolt downwards to move the settlement retaining wall 5cm downward.

[0076] (5) Use a portable frequency measuring instrument to read the frequency of the lateral earth pressure cell of the retaining wall on the settlement side, and convert it into earth pressure, and analyze the change of lateral earth pressure when the retaining wall is tilted outward. Read the reading of the dial indi...

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Abstract

The invention discloses a retaining wall instability model test device and an installation and test method. The retaining wall instability model test device comprises a bottom disc used for retaining soil, breast boards used for simulating the longitudinal plane strain state of a roadbed and loading retaining walls. The two breast boards which are connected with the bottom disc and are parallel to each other are arranged on the bottom disc. The cantilever retaining wall I and the cantilever retaining wall II which are arranged oppositely in a pair are arranged at the ends of the two breast boards. The retaining wall I is provided with a retaining wall rotary device. The retaining wall II is provided with a retaining wall settling device. A gap is formed between the bottom of the retaining wall II and the bottom disc. Detection devices used for detecting soil pressure and displacement are arranged on the retaining wall rotary device and the retaining wall settling device. A retaining wall instability model test is conducted and the device and method can be used for research on soil pressure and displacement change rules of the retaining walls under different instability working conditions. The device can be applied to instability tests and research of the retaining walls of various packing types and with different top loads.

Description

technical field [0001] The invention relates to the technical fields of road engineering, railway engineering and geotechnical engineering, in particular to a retaining wall instability model device and a test method. Background technique [0002] Retaining walls can replace high slopes and save land, and are increasingly used in road and railway construction, maintenance and reinforcement. In recent years, cantilever retaining walls and anchor retaining walls mostly use reinforced concrete panels, which have attracted much attention because of their small footprint and high limit height. However, there are many potential failure modes in the long-term use of light retaining walls, mainly including the rotation of the retaining wall around the base plate, the settlement of the retaining wall, and the failure of anchor rods. The research on the instability of retaining wall belongs to engineering destructive research, which cannot be carried out in actual engineering. Once ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D33/00E02D29/02
Inventor 张宏博吴建清李英勇宋修广毛洪录岳红亚王新君孟庆宇于一凡
Owner SHANDONG UNIV