苏锡常及上海地区区域沉降对京沪高速铁路的影响及防治对策

研究目的:苏锡常地区及上海地区区域沉降和地基土特别是深厚软土、松软土区轨下基础工后沉降问题,是影响《时速300～350 km客运专线铁路设计暂行规定》高标准工后沉降量控制的主要问题。本文就京沪高速铁路苏锡常及上海地区区域地面沉降的机理及其影响进行研究和分析,并提出相关对策。研究结果:通过对苏锡常及上海地区区域地面沉降的机理及其影响的研究和分析,提出通过合理控制地下水的开采,建立地面沉降监测网络,针对区域沉降对不同的工程类型的影响,优化施工设计采用不同的工程措施综合处理等对策,以满足高标准工后沉降量的控制,达到京沪高速铁路安全、舒适、平稳性的高标准要求。

The Influence of Regional Subsidence in Suzhou-Wuxi-ChangzhouShanghai Area and Prevention and Cure Countermeasures on BeijingShanghai High Speed Railway

Research purposes:Regional subsidence in Suzhou-Wuxi-Changzhou-Shanghai and the foundation soil settlement after construction especially the profundity soft soil and mellow soil are the primal problems to affect the controlling of high level settling volume after construction which was enacted by the criterion of"Speed in 300-350 km/h of the Passenger Transport Special Railway Design".Regional subsidence mechanism in Suzhou-Wuxi-Changzhou-Shanghai area on Beijing-Shanghai high speed railway were studied and some countermeasures were put forward in the paper. Research results:The results showed that some countermeasures such as exploited groundwater reasonably, set up the ground subsidence monitoring net,optimized working design,and used different engineering measures aim to the influence of regional subsidence on different projects were adopted to satisfy the high level settling volume after construction and ensure the Beijing-Shanghai high speed railway run safely, comfortably and stably.