藏噶隧道蚀变花岗岩地层围岩大变形控制措施研究
摘要：川藏铁路拉(萨)林(芝)段藏噶隧道DK168+805—DK169+140段穿越蚀变花岗岩地层,围岩变形量大、速率快、持续时间长;通过采取调整边墙曲率、长短锚杆结合、双层支护为主的防抗结合变形控制措施,结合临时仰拱、拱脚锁脚锚管等辅助措施,使得围岩最大变形量、速率得以控制,施工效果良好。
关键词：隧道工程围岩支护变形蚀变花岗岩试验
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参考文献[1] 中铁二院工程集团有限责任公司.新建铁路川藏线拉萨至林芝段初步设计地质(第四篇)说明书[R].成都:中铁二院工程集团有限责任公司,2014.
[2] 聂林,陶志平,周德培,等.富水蚀变岩大断面高速铁路隧道开挖大变形控制技术[J].铁道建筑,2012(6):50-53.
[3] 王树英,阳军生,李习平.高地应力凝灰岩地层铁路隧道支护结构大变形的原因及其整治[J].中国铁道科学,2014,35(5):47-54.
[4] 崔光耀,王雪来,王明胜.高地应力深埋隧道断裂破碎带段大变形控制现场试验研究[J].岩土工程学报,2019,41(7):1354-1360.
[5] 王一鸣,任登富,王立川,等.三联隧道穿越煤系地层软岩大变形控制研究[J].地下空间与工程学报,2013,9(S1):1613-1619.
[2] 聂林,陶志平,周德培,等.富水蚀变岩大断面高速铁路隧道开挖大变形控制技术[J].铁道建筑,2012(6):50-53.
[3] 王树英,阳军生,李习平.高地应力凝灰岩地层铁路隧道支护结构大变形的原因及其整治[J].中国铁道科学,2014,35(5):47-54.
[4] 崔光耀,王雪来,王明胜.高地应力深埋隧道断裂破碎带段大变形控制现场试验研究[J].岩土工程学报,2019,41(7):1354-1360.
[5] 王一鸣,任登富,王立川,等.三联隧道穿越煤系地层软岩大变形控制研究[J].地下空间与工程学报,2013,9(S1):1613-1619.
Study on Controlling Large Deformation of Surrounding Rock in Zangga Tunnel Passing Altered Granite Stratum
Abstract: DK168+805—DK169+140 section of Zangga Tunnel passes through the altered granite strata,and the surrounding rock deformation is large,the deformation rate is fast,and the duration is long.Through the use of prevention and resistance deformation control measures such as adjusting the curvature of the side wall,the combination of long and short bolts,and double layer initial support,and combining auxiliary measures such as temporary inverting arches and lock foot anchor pipe for arch foot,the maximum deformation and deformation rate of the surrounding rock are controlled,construction effect is good.
Keywords: tunnels; surrounding rock; supports; deformation; altered granite; testing
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