Dynamic analysis on influence of high-speed railway construction on existing adjacent railway lines and countermeasures

被引：0
作者：
机构：
[1] School of Civil Engineering, Central South University
来源：
Xu, L.-R. (lrxu@csu.edu.cn) | 1600年 / Science Press卷 / 35期
关键词：
Adjacent to existing railway lines; Dynamic test; Inter-city high-speed railway construction; Pipe-pile construction;
D O I：
10.3969/j.issn.1001-8360.2013.06.013
中图分类号：
学科分类号：
摘要：
Excavation of newly built high-speed railways adjacent to existing railway lines cause the subgrade slopes of the adjoining sides of the existing lines to midair, excessive dynamic deformations and accumulated deformations under dynamic train loading will affect the normal service of the subgrades of the existing lines and even lead to subgrade instability. Making use of the Shanghai-Nanjing Intercity High-speed Railway Construction Project which was executed along the existing Beijing-Shanghai Railway Line, dynamic subgrade response tests of the existing Beijing-Shanghai Railway Line were carried out in order to ensure the safe operation of the existing Line. From the tests were obtained the parameters of vibration displacements, frequencies and accelerations of the subgrade of the existing Line corresponding to three stages of construction, i. e., subgrade excavation, pile formation and roadbed filling. The test results show as follows: The largest vibration response peak occurs in the excavation stage, namely the most dangerous stage for the existing subgrade; out of the dynamic response parameters vibration accelerations and vibration displacements are superior in reflecting the dynamic subgrade performance and in establishing the index control standards, so they can be used as the control indexes for dynamic subgrade stability monitoring; dynamic subgrade tests provide data support for slope protection and time of skylight opening in construction.
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页码：82 / 90
页数：8
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