Roadbed dynamic response in-situ test system and roadbed dynamic response in-situ test method

A technology of subgrade dynamics and in-situ testing, applied in the field of subgrade testing, to achieve the effect of actively controlling test conditions and realizing on-site prototype testing
CN102607973AInactive Publication Date: 2012-07-25WUHAN UNIV OF SCI & TECH +1
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
WUHAN UNIV OF SCI & TECH
Publication Date
2012-07-25
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention relates to a roadbed dynamic response in-situ test system and a roadbed dynamic response in-situ test method. The scheme includes that an oil pump (12) is respectively communicated with a P-port of an electro-hydraulic servo valve (6) and a P-port of a first electromagnetic directional valve (8) through a one-way valve (10), an A-port and a B-port of the electro-hydraulic servo valve (6) are correspondingly communicated with a third and fourth operational oil ports (38 and 41) of a two-stage servo hydraulic cylinder (26), and an A-port of the first electromagnetic directional valve (8) is respectively communicated with a second operational oil port (36) of the two-stage servo hydraulic cylinder (26), an A-port of an electromagnetic ball valve (18) and an energy accumulator (5) through a second one-way valve (7). An operational end of the two-stage servo hydraulic cylinder (26) is tightly pressed on the surface of a roadbed (2) through a load sensor (24) and an excitation disc (23), all sensors in the system are electrically connected with a data acquisition card (2), and the data acquisition card (2) and computer auxiliary testing software (1) are mounted in a computer. Using the roadbed dynamic response in-situ test system and the roadbed dynamic response in-situ test method can not only realize in-situ prototype tests but also actively control test conditions.
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Description

technical field

[0001] The invention belongs to the technical field of roadbed testing. In particular, it relates to an in-situ test system and test method for subgrade dynamic response. Background technique

[0002] High-speed railways have very high requirements on the smoothness and stability of the track. The settlement and deformation of the subgrade as the basis for carrying the weight of the track structure and the load of the train will definitely affect the smoothness and stability of the track. Therefore, in order to ensure the smooth and safe operation of high-speed trains, the dynamic problem of track subgrade under the dynamic load of trains is a basic issue that must be considered in the construction of high-speed railways.

[0003] The subgrade not only bears the static load of the superstructure, but also suffers from repeated dynamic loads when the train is running. High-speed trains will not only increase the dynamic load and vibration frequency of the tr...

Claims

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