木寨岭隧道大坪斜井软岩大变形原因分析及施工技术--《隧道建设》2010年02期

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木寨岭隧道大坪斜井软岩大变形原因分析及施工技术

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【摘要】:介绍木寨岭隧道大坪斜井出现的碳质板岩段大变形情况,以及大变形发生和发展规律。从几个主要方面分析产生变形的原因,并得出产生大变形的主因和诱因。在实际施工中,结合研究成果提出针对大变形段的建议治理措施,对该斜井大变形的及时处理和控制效果起到了较好的效果。水利论文yT ew,zkH6G pT

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中国中铁隧道股份有限公司隧道三公司;兰渝铁路有限责任公司;

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k`"I*x? f-aB~0斜井 软岩 大变形 高地应力 施工技术水利论文xn$kX,y

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0引言新建兰渝铁路木寨岭隧道为地处高地应力区的特长双线隧道。隧道开工至今已有多个斜井出现严重的大变形情况,总体来看木寨岭隧道各斜井出现的大变形都具有变形发生突然、变形发生后变形速率高且难以控制、最终变形量大等特点。大变形导致隧道拱墙出现拱架扭曲变形、底部

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