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本文以北京地铁10号线公主坟站-西钓鱼台站工程为例,探讨研究了砂卵石地层盾构穿越多样风险源工程施工措施,并以研究成果指导工程的实践,且取得了良好效果。论文提出了不同地层同步注浆参数的控制范围,得出适应于不同地层参数的盾构同步注浆综合控制技术,同时利用数值分析软件分析了同步注浆采用单浆液与双浆液与地表沉降的关系。在工程施工中,对地铁盾构参数进行了深入研究,结合试验段相应数值统计,提出了在不同地质条件下,盾构刀盘扭矩、盾构推力以及土压力的控制范围。本文经理论分析、模拟计算及实践修正后,提出的盾构穿越重大风险工程沉降控制技术对类似工程具有较强指导意义。
Taking the project of Gongzhufen Station - West Diaoyutai Station of Beijing Metro Line 10 as an example, this paper studies the construction measures of shield penetrating diversified risk sources in sand-gravel stratum. The research results are used to guide the practice of the project and good results have been achieved. In this paper, the control range of synchronous grouting parameters in different stratum is proposed, and the integrated control technology of shield synchronous grouting which adapts to different stratum parameters is obtained. Meanwhile, the numerical analysis software is used to analyze the synchronous grouting using single slurry and double grout and surface subsidence relationship. In engineering construction, the subway shield parameters are deeply studied. Combined with the corresponding numerical statistics in the test section, the control range of shield cutter torque, shield thrust and earth pressure under different geologic conditions is proposed. After the theory analysis, simulation calculation and practice correction, this paper puts forward that the shield penetration control technology of major risk engineering has strong guiding significance for similar projects.