2016年12月上 施工技术 第45卷第23期 CONSTRUCTION TECHNOLOGY 49 D0I:10.7672/5js2016230049 盾构原位拆解纵向卸荷对管片结构和围岩的影响 及加固措施研究* 彭祖昭1，李向海2，王维，何悦1 (1.西南交通大学交通隧道工程教育部重点实验室，四川成都610031； 2.中国铁建大桥工程局集团有限公司，天津300300) [摘要]依托新街台格庙矿区1号矿井主斜井工程，通过数值模拟手段，探索了盾构原位拆解中纵向卸荷对管片结 构和围岩的影响规律，提出相应的加固措施，并建立加固后的纵向卸荷数值模拟模型，分析了加固效果，确定合理 的施工措施.结果表明：未加固的情况下，纵向卸荷后最大、最小主应力和位移的最大值还有塑性区的分布转移至 掘削面上前方，围岩和管片结构的位移明显增加，最大、最小主应力明显减小；加固后，围岩和管片结构的位移及增 幅明显降低，主应力降幅增加，且最大值转移至掘削面的下前方. [关键词]煤矿：斜井；盾构；原位拆解；纵向卸荷；数值模拟；加固措施 [中图分类号]TD262.1*2:TD421.5 [文献标识码]A [文章编号]1002-8498(2016)23-0049-04 The Influence of the Longitudinal Unloading in the Shield's In-situ Disassembly on the Segment Lining Structure and the Surrounding Rock and Reinforcement Measures Peng Zuzhao' Li Xianghai Wang Wei' He Yue' (1.Key Laboratory of Transportation Tunnel Engineering Ministry of Education Southacest Jiaotong University Chengdu Sichuan 610031 China;2.China Railway Construction Bridge Engineering Bureau Group Co.Lid.Tianjin 300300 China) Abstract:Based on the main inclined shaft project in Xinjie Taigemiao mining area the research on the influence law of the process to the segment lining structure and the surrounding rock was analyzed and the corresponding reinforcement measures were put forward.Then this paper established a numerical model for the longitudinal unloading process after the reinforcement and analyzed the effects to choose the reasonable one.The results showed that:before the reinforeement the maximum and minimum principle stress the maximum displacement ...
盾构原位拆解纵向卸荷对管片结构和围岩的影响及加固措施研究.pdf
