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System for kinetic model test of ballastless track subgrade of high-speed railway

A technology of dynamic model and ballastless track, which is applied in the direction of roads, tracks, roads, etc., can solve the problems that track and roadbed models cannot be repeatedly made, geological conditions and environmental conditions are uncontrollable, etc., and it is easy to bury and test operation is simple , Monitoring the overall effect of the system

Active Publication Date: 2012-05-09
ZHEJIANG UNIV
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Problems solved by technology

Another example is the ballastless track test section of the Eastern Suburb Ring Road in Beijing, where real vehicles are used for on-site simulation tests, which can realize dynamic tests at different train speeds. Reproducibility cannot be achieved

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  • System for kinetic model test of ballastless track subgrade of high-speed railway
  • System for kinetic model test of ballastless track subgrade of high-speed railway
  • System for kinetic model test of ballastless track subgrade of high-speed railway

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0030] like figure 1 As shown, the system consists of a model test chamber 1, a high-speed railway ballastless track subgrade model 2, an excitation system 3 and a monitoring system 4; among them:

[0031] 1) Model test chamber 1: a rectangular steel structure model tank composed of main steel structure beams and columns 5 and main structure side steel plates 6, with dimensions of 15m long x 5m wide x 6m high;

[0032] 2) High-speed railway ballastless track subgrade model 2: gravel and sand cushion 22, foundation 7, subgrade bed bottom layer 8, subbed surface layer 9, concrete base 10, CA Mortar 11, track plate 12, fastening system 13 and two steel rails 14, such as figure 2 As shown; two rails 14 are connected on the track plate 12 by fastener system 13, and the bottom layer 8 of the bed and the surface layer 9 of the bed form a trapezoid with a la...

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Abstract

The invention discloses a system for kinetic model test of the ballastless track subgrade of a high-speed railway. The system comprises a model test box, a model of the ballastless track subgrade of the high-speed railway, an excitation system and a monitoring system, wherein the model of the ballastless track subgrade of the high-speed railway is formed by the foundation, a foundation bed bottomlayer, a foundation bed surface layer, a concrete base, CA (cement asphalt) mortar, a track plate, a fastener system and a steel rail in sequence; the excitation system comprises a series of vibration exciters; simulation of train loads at different running speeds is realized by cooperatively controlling the vibration excitation frequency and phase of each vibration exciter; and dynamic earth pressure sensors and layered settlement gauges are arranged in the model of the subgrade, steel strain gauges are embedded in the concrete base and displacement and acceleration sensors are arranged on the track structure to jointly form the monitoring system of the system. The system can be used for carrying out study on the kinetic model test of the subgrade under the running load of the train and can evaluate and predict different foundation conditions, subgrade structures and track irregularity.

Description

technical field [0001] The invention relates to a roadbed dynamics model test system, in particular to a high-speed railway ballastless track roadbed dynamics model test system. Background technique [0002] At present, my country generally adopts ballastless track technology on 300km / h and above passenger dedicated railways. Since the loose ballast of the ballastless track has been replaced by the reinforced concrete material with great rigidity, the structure of the ballastless track is extremely sensitive to the deformation and stiffness of the roadbed. The high-speed operation of the train puts forward high requirements on the dynamic performance of the track structure and subgrade soil. The increase of the train speed leads to the aggravation of the vibration of the track structure, especially when the train speed is close to the critical wave velocity of the soil, the dynamic response of the soil increases sharply. The increase of the train speed leads to a larger in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01B35/00E01C3/00
Inventor 陈云敏边学成蒋红光蒋建群陈仁朋王作洲卢文博王顺玉
Owner ZHEJIANG UNIV
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