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Simulated experiment device for dynamic damages of roadbeds and road surfaces under highway traffic loads

A damage simulation and experimental device technology, applied in the direction of applying repeated force/pulsation force to test the strength of materials, can solve the problems of large influence of boundary conditions, low material similarity, and inability to reflect the dynamic response characteristics of the roadbed, etc., to achieve the device structure Reasonable and easy to operate

Active Publication Date: 2014-04-30
湖南省交通科学研究院有限公司
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Problems solved by technology

The existing subgrade models mainly use small-scale model tests, which are greatly affected by boundary conditions and the material similarity is not high, which cannot reflect the dynamic response characteristics of a certain section of subgrade

Method used

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  • Simulated experiment device for dynamic damages of roadbeds and road surfaces under highway traffic loads
  • Simulated experiment device for dynamic damages of roadbeds and road surfaces under highway traffic loads
  • Simulated experiment device for dynamic damages of roadbeds and road surfaces under highway traffic loads

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Embodiment Construction

[0047] The present invention will be further described below in conjunction with the embodiments and the accompanying drawings.

[0048] refer to figure 1 , an embodiment of the roadbed pavement dynamic damage simulation experiment device under the road traffic load of the present invention, comprising a traffic load dynamic loading system, a roadbed pavement structure and a data acquisition system, the traffic load dynamic loading system comprising a reaction frame column 11, a reaction Force frame beam 12, reaction force frame foundation 13, reaction force frame diagonal strut 14, hydraulic oil source system 15, actuator 16, loading shaft 17, loading wheel pair 18, and the loading wheel pair 18 is covered with tire rubber. The subgrade pavement structure comprises foundation 23, embankment body 22 located on foundation 23, pavement structure 21 and indoor ground 24 located on embankment body 22; data acquisition system comprises pavement test element 31, embankment test elem...

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Abstract

The invention discloses a simulated experiment device for dynamic damages of roadbeds and road surfaces under highway traffic loads. The simulated experiment device is composed of at least one traffic load dynamic loading system, a roadbed-road surface structure and a data acquisition system. Modes for controlling a loading function by a hydraulic oil source system and an MTS servo loading system are adopted, a microcomputer controlled acquisition system controls the vibration waveform of a simulated traffic load and drives an actuator to carry out loading on a loading axis and a loading wheel, the loading wheel transfers dynamic loads to a roadbed part through a road surface structure, and measuring point data of a road surface testing component and a roadbed testing component is intensively controlled, acquired and stored by a microcomputer through data transmission cables. The device disclosed by the invention is reasonable in structure and convenient to operate, and can simulate the needs of a dynamic traffic load simulation test for the long-term behavior of roadbeds and road surfaces acted by a highway traffic load at different speeds and different axle weights.

Description

technical field [0001] The invention relates to a dynamic damage simulation experiment device, in particular to a roadbed pavement dynamic damage simulation experiment device under road traffic load. Background technique [0002] With the rapid development of the national economy, transportation presents the characteristics of "large flow, heavy load and channelized traffic". The negative effect is: the overloading of trucks is becoming more and more serious, and the actual cumulative standard axle load increases sharply, which directly leads to the damage of the roadbed and the early damage of the road surface. The long-term performance of subgrade and pavement under heavy traffic load has attracted increasing attention. The coupling damage of subgrade and pavement is a difficult problem in traffic engineering, especially the fatigue damage of subgrade under heavy traffic load, which has a key impact on the long-term stability of subgrade structure and the induced damage o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/36
Inventor 李志勇陈晓斌董城岳志平郑祖恩高琼吴欣张晓军刘卓
Owner 湖南省交通科学研究院有限公司
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