软弱地层地铁盾构下穿高铁的安全控制技术研究

发布时间：2018-05-25 13:20

本文选题：盾构隧道 + 下穿　；参考：《土木工程学报》2015年S1期

【摘要】：依托苏州轨道交通2号线盾构下穿沪宁城际高速铁路工程,采用理论分析和三维数值仿真,系统地阐述分析软弱地层条件下盾构穿越高铁所存在的风险,并研究提出一套包括多方面措施的安全控制体系。研究表明:制定沉降控制标准时必须充分考虑地层工后沉降;仅针对地层注浆加固的传统方案难以满足穿越高铁要求,研究提出了"分区注浆+板桩隔离"的新型保护体系;穿越施工期间应限制列车运行速度,优良的盾构设备、微扰动掘进工艺、充分同步注浆及二次补浆、自动化远程监控等措施,可有效规避或降低穿越高铁施工风险。实际工程安全顺利穿越高铁,验证说明了本文所提出的盾构穿越高铁控制措施的合理性、有效性。
[Abstract]:Relying on the project of Shanghai Nanjing Intercity High Speed Railway under the shield of Suzhou Rail Transit Line 2, the risk of the shield crossing the high speed rail under the condition of weak stratum is systematically expounded and analyzed by the theoretical analysis and three-dimensional numerical simulation, and a set of safety control system which includes various measures is put forward. The research shows that the settlement control standard is made. It is necessary to fully consider the post construction settlement. The new protection system, which is only difficult to meet the requirements of crossing high speed iron, is only difficult to meet the requirement of crossing high speed rail. The study puts forward a new protection system of "zoning grouting and plate pile isolation". During the course of construction, the train speed, fine shield equipment, micro disturbance driving technology, fully synchronous grouting and two grouting should be fully used. Automatic remote monitoring and other measures can effectively avoid or reduce the risk of passing through the high speed rail. The actual project is safe and smooth through the high speed rail. The verification shows the rationality and effectiveness of the shield tunneling through the high speed rail control measures proposed in this paper.
【作者单位】：北京交通大学;苏州市轨道交通集团有限公司;
【基金】：国家自然科学基金面上项目(51178027)
【分类号】：U455.43;U231.3

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