软土区地铁不同类型轨道振动测试分析

丁智; 王永安; 顾晓卫; 黄小斌; 魏新江; 魏纲

doi:10.11779/CJGE2017S2053

软土区地铁不同类型轨道振动测试分析 English Version

1. 浙江大学城市学院土木工程系,浙江杭州 310015;
2. 武汉地铁集团有限公司,湖北武汉 430030;
3. 杭州杭港地铁有限公司,浙江杭州 310017

基金项目: 国家自然基金项目（51508506）; 浙江省自然基金项目（LQ16E080008）; 杭州市科技计划项目（20160533B94、20172016A06）; 浙江省交通厅科研计划项目（2017006）

详细信息

作者简介:
丁智(1977- ),男,安徽铜陵人,博士,副教授,主要从事地铁施工及运营对周边环境影响方面的研究与教学工作。E-mail: dingz@zucc.edu.cn。

通讯作者:
魏纲，E-mail：weig@zucc.edu.cn

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出版历程
- 收稿日期: 2017-08-01
- 发布日期: 2017-12-19

Vibration of different types of tracks of subway in soft soil

1. Department of Civil Engineering, Zhejiang University City College, Hangzhou 310015, China;
2. Wuhan Metro Group Co., Ltd., Wuhan 430030, China;
3. HANGZHOU MTR, Hangzhou 310017, China

摘要

摘要: 软土区地铁隧道结构在列车荷载作用下,工后沉降问题已引起广泛关注,而考虑不均匀沉降下的轨道动力特性实测研究却未见报道。以浙江省某地铁隧道为研究对象,对该隧道两个轨道断面进行了隧道沉降变形观测和钢轨竖向振动测试。基于监测结果,分析了两断面沉降变形和振动实测结果的差异,并对软土区地铁轨道型式进行优选分析。研究结果表明：理论模型计算与振动实测结果量值相当,但理论计算模型未考虑不均匀沉降及轨道弯曲效应,较实测值小;钢弹簧浮置板轨道钢轨振级比普通整体式轨道小10 dB;钢弹簧浮置板轨道固有频率较普通整体式轨道低,列车经过时,较早达到振动峰值,列车经过后,较晚恢复平息;整体式轨道振动对周围土体的扰动大于钢弹簧浮置板轨道,因前者沉降值大于后者,沉降值变大又会进一步加大振动影响。为确保良好的运营条件,建议软土区不均匀沉降工况下采用钢弹簧浮置板等减振轨道型式。
- 软土地区 /
- 地铁隧道 /
- 不均匀沉降 /
- 钢轨振动 /
- 现场测试
Abstract: The settlement of subway tunnel due to the rail load after its construction has cause wide concern. But the report of dynamic characteristics of railroad considering uneven settlement has not been reported. Based on a subway tunnel in Zhejiang Province, by choosings two sections of the tunnel, the settlement deformation is measured and the vertical vibration of iron rails is tested. The differences of tunnel settlement deformation and rail vibration are analyzed based on the results. The optimization analysis is conducted for the two section styles. The research results show that the calculated values by the theoretical model agree with the measured ones. But the theoretical results are less than the measured ones because it does not consider the uneven settlement and bending effect. The rail vibration level of steel spring floating slab track is 10 dB smaller than that of the ordinary monolithic track. The vibration acceleration of steel spring floating slab track rail reaches the peak value earlier when the car arrives and quells down later when the car leaves because the inherent frequency of the former is lower than the later one. The vibration of ordinary monolithic track affects the surrounding soil stronger than the vibration of steel spring floating slab track. Larger bigger settlement will cause larger vibration. In order to ensure good operation conditions, it is suggested that the rail track style should adopt steel spring floating slab track in soft soil districts with uneven settlement.
- soft soil district /
- subway tunnel /
- uneven settlement /
- iron rail vibration /
- field test

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参考文献(7)

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