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新建综合管廊顶推下穿运营铁路动力响应分析

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当综合管廊近距离下穿既有运营铁路线路时,线路临时加固体系的稳定性决定运营铁路的安全.依托深圳市梅观高速公路综合管廊下穿平南铁路工程项目,采用有限元数值分析方法,分析不同通车情况下线路加固体系各结构的受力变形特征.结果表明:列车双线同向行驶时,D型钢便梁的最大竖向变形数值为对向行驶时的1.32倍;当采用D型钢便梁+支撑桩+锚固结构的联合加固体系时,最大竖向位移均未超过3mm,实现了综合管廊顶推下穿施工毫米级沉降控制.
Dynamic Response Analysis of Newly-built Pipe Gallery Undercrossing Operating Railway in Incremental Launching
When pipe gallery needs to pass through existing operating railway in close distance,the stability of the temporary line reinforcement system will determines the security of the operating railway.Based on the project of pipe gallery of Meiguan Expressway undercrossing Pinghu—Nantou Railway in Shenzhen,the finite element numerical analysis method was used to analyze the stress deformation characteristics of each structure of the line reinforcement system under different traffic conditions.The results show that,the maximum vertical deformation of D beam when trains run on two lines in the same direction is 1.32 times of that when trains in the opposite direction;where the reinforcement system integrating type D steel beam,supporting pile and anchorage structure is adopted,each maximum vertical displacement does not exceed 3 mm,realizing millimeter-level settlement control for undercrossing construction of pipe gallery with push-down methold.

pipe gallerythrusting undercrossingthe temporary line reinforcement systemdynamic responsestability

李传林、闫鑫雨、曾勇

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中交第二航务工程局有限公司,武汉 430040

综合管廊 顶推下穿 线路临时加固体系 动力响应 稳定性

2024

路基工程
中铁二局集团有限公司,西南交通大学,中铁二院工程集团有限责任公司

路基工程

影响因子:0.36
ISSN:1003-8825
年,卷(期):2024.(1)
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