【摘要】 以上(海)瑞(丽)高速公路湖南境内邵(阳)-怀(化)段拱坝隧道掘进中掌子面前方岩体结构的超前预报为例,介绍了TSP203地球物理探测新方法,预报了该隧道右线YK91+163-YK91+080段的围岩由于节理发育,且地表水与节理裂隙贯通性较好,因此稳定性较差,在施工中将很易造成坍塌,应按Ⅱ类围岩支护;在YK91+080-YK91+045段围岩稳定性较好,可视具体情况变更支护方案;YK91+031-YK91+013段,可能存在层间破碎带或软弱夹层,在施工过程中需要加强支护。通过探测保证了及时、详细、准确地了解开挖掌子面前方的岩体结构情况,为施工单位合理安排施工作业进度、保障施工人员生命安全、减少工程隐患提供了科学依据。更多还原

【Abstract】 This paper firstly introduced a new exploring method-TSP(Tunnel Seismic Prediction)203 system,then took the advanced prediction of wall rock structure in front of the face of Gongba tunnel in Shaoyang-Huaihua Section,Hunan,Shanghai-ruili express way as an example,the results were as follows: The wall rock stability was lowness in YK91+163-YK91+080 section,because joints were developed and surface water ran through the joints,the roof is liable to fall in tunneling and was necessary to be safely supported according to Ⅱ type of wall rock.The wall rock stability was good in YK91+080-YK91+045 section,safety support can be adjusted.There were some rock fragmentation zones and weak intercalated layers in YK91+031-YK91+013 section,it is necessary to strengthen safety support during tunneling.All of above information is very important for the arrangement of tunneling method,safety construction and the reduction of hidden dangers.更多还原