青岛胶州湾海底隧道F_(4-4)含水断层注浆前后TSP探测分析  

Analysis on TSP prediction before and after grouting about water-burst fault F_(4-4) of subsea tunnel in Qingdao Jiaozhou Bay

作　　者：薛翊国[1] 李术才[1] 赵岩[1] 苏茂鑫[1] 李为腾[1] 丁志海[1] 

机构地区：[1]山东大学岩土与结构工程研究中心,山东济南250061

出　　处：《山东大学学报（工学版）》2009年第2期108-112,共5页Journal of Shandong University（Engineering Science）

基　　金：国家重点基础研究计划(973)资助项目(2007CB209407);国家自然科学基金重点资助项目(50539080);国家高技术研究发展技术(863计划)资助项目(2007AA11Z131);港;澳青年学者合作研究基金资助项目(50729904)

摘　　要：海底隧道含水断层的预报是海底隧道修建过程中的重大理论和技术难题之一,对其位置与规模的准确预报可为超前预注浆提供依据与指导.通过TSP超前探测,确定了青岛胶州湾海底隧道F4-4含水断层发育的位置与规模,探明了该断层受构造影响严重,围岩破碎,岩体强度低,自稳能力差,在极端地质条件下存在突水的高风险,施工风险极大.该预报为超前预注浆提供了依据,最后采用TSP手段对注浆后围岩情况进行了注浆效果检验,TSP探测结果表明,注浆后围岩整体性得到提高,其强度提高了19 .1 %,密度提高了3 .6 %,泊松比下降了7 .1 %,纵波波速增长了0 .8 %,纵横波比减小了7 .1 %,表明断层破碎带内含水量降低,裂隙得到有效充填,注浆效果显著,达到了注浆目的.该海底隧道含水断层的TSP超前预报方法以及注浆处理后的注浆效果检验手段对类似工程具有一定的借鉴与指导意义.The prediction about water-burst fault is one of the most important theories and technologically difficult problems during subsea tunnel construction. To predict the location and scale accurately can provide a basis and guide for grouting in advance. The location and scale of the F4-4 water-burst fault were ascertained through TSP in the subsea tunnel of Qingdao Jiaozhou Bay. The F4-4 fault was gravely affected by structure, and the surrounding rock broke. The intensity of rock mass is low, and it is very difficult to keep self-stabilization. So it has high water-burst haze. The TSP prediction can provide the basis for grouting in advance. Finally, the TSP was used to check the surrounding rock after grouting. The result indicated that globality of surrounding rock improved. The intensity has improved 19.1%, the density has improved 3.6%, the passion rate has been reduced 7.1%, the Vp has improved 0.8%, and the Vp/Vs ratio has been reduced 7.1%. The results indicate that the moisture content of the F4-4 fault has been reduced, and the joint has been filled. The prediction methods before grouting, the check methods after grout- ing and the above water-burst fault have certain drawing lessons and guiding significance for similar projects.

关 键 词：青岛胶州湾海底隧道 F4-4含水断层 TSP超前预报 注浆效果检验 

分 类 号：P642[天文地球—工程地质学] U45[天文地球—地质矿产勘探]