摘要
研究目的:厦深铁路梁山隧道DK 96 +505 ~ DK 96 +530里程段发育有富水全~强风化花岗岩软弱带, 长度25 m。该段隧道埋深270 m。软弱带呈陡倾状,倾角为75° ~85°,两端为完整的花岗岩。软弱带沿隧道 横向延伸长度约2.3 km。2009年3月14日,隧道开挖至软弱带时发生突水突泥,涌泥总量约3万m3,淤积隧 道长度230 m,致使地表塌陷200 m2,陷坑深度20 m。随后在隧道左侧设置迂回导坑,施工中再次发生突水突 泥,使地表陷坑加剧,施工受阻。因此,必须研究施工技术方案处理该深埋富水滑动型软弱带。
研究结论:(1)针对深埋富水滑动型软弱带突水突泥,采用“排水降压、旋喷加固、超前管棚”综合处理方 案是可行的;(2)针对大跨度复杂地质隧道,采用“高扬工法”施工期间总变形量约2 mm,该工法安全可靠,施工相对简单;(3)该研究成果可用于隧道深埋富水滑动型软弱带的处理。
Abstract
Research purposes : DK 96 + 505 ?DK 96 + 530 paragraph o Liangshan tunnel on Xiamen - Shenzhen Railway developed water rich granite weak zone in which the length is 25 m, buried depth is 270 m. The weak zone is steeply inclined with a dip angle of 75 degrees to 85 degrees, and the two ends are complete granite. The lateral extension length of the weak zone is about 2. 3 km. On March 14 , 2009 , when the tunnel excavated to the weak zone , water and mud bursting occurred , mud total is about 30 thousand m3 , and siltation tunnel length is 230 m , resulting in surface collapse 200 m2 and pit depth of 20 m. Then set the circuitous heading at the left side of the tunnel , water gushing occurred again in the construction , the construction was blocked. Therefore , it is necessary to study the construction technology scheme to deal with the deep water rich sliding type weak zone.
Research conclusions:(1) For deep water slide type soft with water and mud bursting , the comprehensive treatment scheme of 11 drainage and pressure lowering , grouting reinforcement , advanced pipe shed" is feasible. (2) For a large span tunnel , the 11 Gaoyang construction method" is adopted , the total deformation during construction is 2 mm , this method is safe and reliable , and the construction is relatively simple. (3) The research results can be used for the treatment of water rich sliding weak zone on tunnel.
关键词
隧道 /
富水滑动软弱带 /
排水降压 /
水平旋喷
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Key words
tunnel /
water rich sliding zone of weakness /
drainage /
horizontal rotary jet grouting
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张民庆, 高扬. , {{custom_author.name_cn}}等.
隧道深埋富水滑动型软弱带突水突泥处理技术[J]. 铁道工程学报, 2015, 32(11): 102-106
ZHANG Min - qing1, GAO Yang2. , {{custom_author.name_en}}et al.
Treatment Technology for Water and Mud Bursting of Deep Water Rich Sliding Type Weak Zone on Tunnel[J]. Journal of Railway Engineering Society, 2015, 32(11): 102-106
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脚注
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