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Roadbed soil displacement field and seepage field visualized testing apparatus under seepage moving vehicle dynamic load and testing method thereof

A test device and technology of subgrade soil, applied in the direction of foundation structure test, soil material test, measuring device, etc., can solve the problem of subgrade soil displacement field and seepage field being invisible, so as to overcome soil strain and displacement unmeasurable , reasonable structure and convenient operation

Inactive Publication Date: 2018-07-27
南京科兴新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies and defects, and propose a test device and test method for visualizing the displacement field and seepage field of subgrade soil under the dynamic load of seepage traffic, which solves the problem of the displacement field and seepage field of subgrade soil under the dynamic load of seepage traffic. The invisible problem realizes the visual observation of the subgrade soil displacement field and seepage field under the dynamic load of seepage traffic

Method used

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  • Roadbed soil displacement field and seepage field visualized testing apparatus under seepage moving vehicle dynamic load and testing method thereof
  • Roadbed soil displacement field and seepage field visualized testing apparatus under seepage moving vehicle dynamic load and testing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0050] The first step: place the support 2 and the model test tank 14 in a flat field, and keep the light uniform in the field. In this example, the size of the upper and lower sides of the support is 2500 (long) * 500 (wide) (unit; mm); in this example, the model test tank 14 is made of plexiglass that meets the light transmission requirements, and its size is 2000 (long) × 250 (width) × 250 (height) (unit: mm), the wall thickness is 5mm, the upper part is open, the bottom is connected with the bracket 2 and several openings are provided at the same position to be connected with the water supply pipe 19; the model test tank 14 Layers of pebbles 5 are laid on the bottom to simulate the impact of seepage fluid on saturated transparent soil 13 under real conditions.

[0051] According to the physical and mechanical parameters (mainly including friction angle, cohesion, void ratio, water content, etc.) of the embankment soil simulated in this test, the mix ratio of saturated tran...

Embodiment 2

[0062] Example 1 uses the method of increasing the vibration frequency of the loading function in the load simulation system to study the influence of dynamic loads on the displacement field and seepage field change of the subgrade soil under the condition of constant seepage water head. The influence of displacement field and seepage field change, can change the implementation mode of step five, six, seven on the basis of embodiment 1, concrete improvement is as follows: open hydraulic oil pump device 6, at first control servo actuating arm 7 to descend by computer 10 The roller 8 has just touched the loading plate 4 of the roadbed model, and then the control mode of the loading function is selected by the computer 10 to simulate the vibration waveform under different traffic loads, and the loading shaft 12 and the roller 8 are loaded; the outer roller 8 in this example Wrapped with a rubber sleeve; the vibration waveform adopted in this example is a high-order Fourier (Fourie...

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Abstract

The invention discloses a roadbed soil displacement field and seepage field visualized testing apparatus under seepage moving vehicle dynamic load and a testing method thereof. The visualized testingapparatus comprises a seepage system, a roadbed simulation system, a load simulation system and a data acquisition system, and the seepage system is composed of a water supply case and a feed pipe; the feed pipe is connected with the bottom of a test model groove, multilayer pebbles are sprayed in the test model groove, and saturated and transparent soil is placed on the multilayer pebbles to simulate the roadbed fill soil; an engineering pile is buried in the saturated and transparent soil to simulate the piled roadbed; the load simulation system is composed of a support, a hydraulic oil pumpapparatus, a servo actuating arm, a roller, and a computer; and the data acquisition system is composed of a laser, a CCD camera and a computer. The technology can realize the visualized observationof the roadbed soil displacement field and the soil displacement field under the seepage moving vehicle dynamic load, and the testing apparatus has the advantages of simpleness, economic performance and high feasibility.

Description

technical field [0001] The invention relates to the technical field of traffic engineering visualization, in particular to a test device and a test method for visualizing the displacement field and seepage field of subgrade soil under the dynamic load of seepage traffic. Background technique [0002] With the rapid development of my country's urban traffic, more and more people pay attention to road traffic problems caused by vehicle loads, especially considering the stress and strain of subgrade soil under the action of seepage field and driving dynamic load. However, the traditional traffic load indoor tests are mostly divided into two categories: one is to simulate the traffic load through the vibration generated by the servo loading system; the other is to analyze the dynamic performance of subgrade soil through the indoor dynamic triaxial test. However, neither of these two methods can overcome the defect that there is no scaled-scale traffic load entity for loading, an...

Claims

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Application Information

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IPC IPC(8): G01N33/24E02D33/00G01N15/08
CPCE02D33/00G01N15/08G01N33/24
Inventor 不公告发明人
Owner 南京科兴新材料科技有限公司
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