Experimental device for dynamic damage simulation of subgrade and pavement under highway traffic load
A damage simulation and subgrade technology, applied in the direction of applying repeated force/pulsating force to test the strength of materials, can solve the problems of large influence of boundary conditions, low similarity of materials, and inability to reflect the dynamic response characteristics of subgrade, etc., and achieve a reasonable structure of the device , the effect of convenient operation
Active Publication Date: 2017-01-04
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
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[0047] The present invention will be further described below in conjunction with the embodiments and drawings.
[0048] Reference figure 1 , An embodiment of the roadbed and pavement dynamic damage simulation experiment device of the present invention under highway traffic load includes a traffic load dynamic loading system, a subgrade pavement structure, and a data acquisition system. The traffic load dynamic loading system includes a reaction support column 11, a reaction Force frame beam 12, reaction frame foundation 13, reaction frame diagonal strut 14, hydraulic oil source system 15, actuator 16, loading shaft 17, loading wheel set 18, and loading wheel set 18 is covered with tire rubber. The subgrade pavement structure includes a foundation 23, an embankment body 22 set on the foundation 23, a pavement structure 21 set on the embankment body 22, and an indoor ground 24; the data acquisition system includes a pavement test element 31, a subgrade test element 32, and a data tr...
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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 subgrade pavement dynamic damage simulation experiment device under highway traffic load. Background technique [0002] With the rapid development of the national economy, transportation has shown the characteristics of "large flow, heavy load and channelized traffic". The negative effect is that the overload 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 destruction 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 influence on the long-term stability of subgrade structure and induced pav...
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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