Dynamic cyclic load retaining wall model test device and test method

A model test device and retaining wall technology, which is applied in the fields of geotechnical engineering, road engineering, and railway engineering, to achieve the effects of easy molding, good durability, and easy local materials

Active Publication Date: 2016-11-16
POWERCHINA HEBEI ELECTRIC POWER SURVEY & DESIGN INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Dynamic cyclic load retaining wall model test device and test method
  • Dynamic cyclic load retaining wall model test device and test method
  • Dynamic cyclic load retaining wall model test device and test method

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0057] Example 1

[0058] (1) Model installation: sand is used as filler, and the degree of compaction is controlled at 85%;

[0059] (2) Read the initial pressure of the lateral earth pressure cell of the rotating retaining wall and the initial displacement of the dial gauge;

[0060] (3) Control the vertical jack through the controller 6, so that the pressurization time is 3s, the decompression time is 3s, pressurization and decompression are repeated, and stop after five minutes of decompression. Taking the five-minute stop time as the starting point, measure the earth pressure and displacement every minute, and analyze the earth pressure and displacement changes of the retaining wall in different periods after the end of the vertical seismic wave;

[0061] (4) In step (3), if the seismic loading platform is broken, the loading platform needs to be replaced again.

Example Embodiment

[0062] Example 2

[0063] (1) Model installation: silt is used as filler, and the degree of compaction is controlled at 90%;

[0064] (2) Read the initial pressure of the lateral earth pressure cell of the rotating retaining wall and the initial displacement of the dial indicator;

[0065] (3) Keep the pressure of the vertical jack constant, and control the horizontal jack through the controller 6. While the left side is pressurized for 3 seconds, the right side is decompressed for 3 seconds, then the left side is decompressed for 3 seconds, the right side is pressurized for 3 seconds, and the pressure is reciprocated. Pressure, stop after five minutes of increasing and decreasing pressure. Taking the five-minute stop time as the starting point, measure the earth pressure and displacement every minute, and analyze the earth pressure and displacement changes of the retaining wall in different periods after the end of the ground level seismic wave;

[0066] (4) In step (3), if...

Example Embodiment

[0067] Example 3

[0068] (1) Model installation: sand is used as filler, and the compaction degree is controlled to 90%;

[0069] (2) Read the initial pressure of the lateral earth pressure cell of the rotating retaining wall and the initial displacement of the dial indicator;

[0070] (3) Keep the pressure of the vertical jack and the horizontal jack constant. The initial position of the loading vehicle is at one end of the model slot. The loading vehicle is covered with steel blocks so that the converted axle load of the vehicle is 100KN. The speed of the traction motor is controlled by the controller 6 so that The loading cart produces a running speed of 40Km / h. And according to the length of the slide rail, the running time of the motor is determined to be 0.18s. During the operation of the front-end traction motor for 0.18s, the rear-end traction motor does not work, and then the rear-end traction motor works for 0.18s, and the front-end traction motor does not work. Re...

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Abstract

The invention discloses a dynamic cyclic load retaining wall model test device and a test method. The dynamic cyclic load retaining wall model test device comprises a model groove fixedly connected with the ground. A retaining wall filled with soil is arranged in the model groove and comprises retaining wall vertical plates arranged oppositely and a retaining wall bottom plate arranged at the lower ends of the retaining wall vertical plates. Seismic dynamic load applying equipment is arranged at the bottom of the retaining wall. A vehicle dynamic cyclic load device is fixedly arranged at the top of the retaining wall. The seismic dynamic load applying equipment and the vehicle dynamic cyclic load device are controlled by a controller. A soil pressure monitoring device used for testing pressure on soil and a displacement monitoring device used for monitoring the horizontal displacement of the retaining wall are arranged in the retaining wall. According to the dynamic cyclic load retaining wall model test device and the test method, the seismic dynamic load applying equipment and the vehicle dynamic cyclic load device are arranged to apply different dynamic loads on the retaining wall, and therefore a technician is guided to reasonably consider the influence of dynamic loads on the stability of the retaining wall in the construction period.

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 [0002] Model test device and test method. Background technique [0003] In recent years, retaining wall technology has been widely used in highway, railway, water conservancy, electric power engineering and other fields. The structural form of the retaining wall has also been continuously developed, and the limit design height of the retaining wall has also been continuously increased. In the current practical engineering, the static load of earth pressure and the influence of prestressed load on the force of the retaining wall are mainly considered. The dynamic load factor is ignored because it is difficult to calculate accurately. The durability and stability of retaining walls are key performance indicators for the safe operation of retaining walls, and the influence of dynamic loads on retaining...

Claims

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Application Information

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IPC IPC(8): E02D33/00E02D29/02
CPCE02D29/02E02D33/00E02D2300/002
Inventor 黄大伟
Owner POWERCHINA HEBEI ELECTRIC POWER SURVEY & DESIGN INST CO LTD
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