地铁隧道穿越厚碎裂岩层的支护优化分析
王璐许霞李红英
Supporting Optimization Analysis of Subway Tunnel Crossing the Thick Cataclastic Stratum
WANG LuXU XiaLI Hongying
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作者信息:青岛黄海学院建筑工程学院，266427，青岛
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Affiliation:College of Architecture Engineering, Qingdao Huanghai University, 266427, Qingdao, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2019.03.030
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中图分类号/CLCN:U455.7
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栏目/Col:施工技术
摘要:
青岛地铁3号线汇泉广场站—中山公园站区间穿越厚碎裂岩层地质，其岩体节理裂隙较为发育，导致围岩自稳能力较差，以及施工风险较大。结合现场地质条件和施工环境，提出了4种隧道支护结构加固方案；通过数值模拟分析了各加固方案的地表沉降、初期支护结构主应力及围岩塑性区发展情况；基于灰色关联定量分析了各加固方案对5项评价指标的综合支护效果。结果表明：全断面WSS超前帷幕注浆对地层沉降和围岩塑性区发展控制效果最好，超前小导管支护对抑制围岩塑性区发展较明显；碎裂岩层隧道的综合加固效果为：全断面WSS超前帷幕注浆>超前小导管支护>增大拱顶锚杆长度、增设拱肩及拱脚锚杆>提高初期支护刚度。
Abstracts:
The Huiquan SquareZhongshan Park tunnel section on Qingdao metro Line 3 crosses the thick cataclastic stratum，the joints and fissures of which are quite developed, easily leading to poor surrounding rock stability and high construction risk. Considering the geological conditions and construction environment, 4 supporting schemes are put forward. The ground surface settlement, principal stress of initial supporting structure, and plastic zone development conditions of the surrounding rock with different reinforced cases are studied by numerical simulation, the comprehensive supporting effects of 5 evaluation indicators are analyzed based on gray correlation theory. The results show that full face WSS (Windows SharePoint Services) curtain grouting has the best control effect on the surface subsidence and plastic zone development, while the small pipe support in advance could obviously refrain the plastic zone development of surrounding rocks. The comprehensive reinforcement effects of cataclastic rock tunnel are evaluated as: the full face curtain grouting > the small pipe support in advance > increasing crown anchor length, adding arch abutment and arch foot bolt > improving the initial supporting stiffness.
引文 / Ref:
王璐，许霞，李红英.地铁隧道穿越厚碎裂岩层的支护优化分析[J].城市轨道交通研究，2019，22（3）：132.
WANG Lu，XU Xia，LI Hongying.Supporting Optimization Analysis of Subway Tunnel Crossing the Thick Cataclastic Stratum[J].Urban mass transit，2019，22（3）：132.
WANG Lu，XU Xia，LI Hongying.Supporting Optimization Analysis of Subway Tunnel Crossing the Thick Cataclastic Stratum[J].Urban mass transit，2019，22（3）：132.
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