地球物理综合勘探技术在南水北调工程中的应用

南水北调西线一期工程的引水隧洞长达73km，最大埋深1100m，因此软围岩大变形及岩爆等工程地质问题尤为突出。利用地球物理综合探测技术对工程区的工程地质条件进行了研究，并对隧洞开挖过程中可能遇到的工程地质问题进行了分区。对于南水北调西线工程而言，首先应该考虑的地球探测指标是探测深度。因可控源音频大地电磁法（CSAMT法）探测深度为1～2km，所以当各种地球物理探测技术对深部的探测结果相互抵触时，要对CSAMT法的测试结果给予充分的重视。在南水北调西线一期工程玛柯河-贾曲段的工程地质条件勘察过程中，地球物理综合勘探技术对155～239桩段断层破碎带的解释结果与野外岩石露头所反映的地质信息吻合较好，并得到了钻孔资料的验证，说明地球物理综合勘探技术值得在南水北调西线工程中推广。

Application of comprehensive geophysics exploration technology to water diversion project from south to north of China

Seepage tunnel of the west line of water diversion project from .south to north of China is 73 km long and its maximal depth of burial is 1 100 m. Therefore, large deformation of weak rock and rock outburst should become notable. Engineering geology condition was detected by comprehensive exploration technology of geophysics, and the seepage tunnel was deported along its length according to probably appearing engineering geology problems. Exploration depth of geophysics method is first factor to be considered for the west line of water diversion project from south to north of China. Exploration depth of CSAMT ranges from 1 to 2 km. Consequently the results of CSAMT should be paid more emphasis on when the results of different exploration technology of geophysics present discrepancy. Comprehensive exploration technology of geophysics was applied to engineering geology reconnaissance of the port from Make river to Jia river of the west line of water diversion project from south to north of China. The results of comprehensive exploration technology of geophysics for default and crash belt from the stations ranging from 155 to 239 agree well with geology information of rock outcrop, which are verified by drilling data. Comprehensive exploration technology of geophysics is worth popularizing in the west line of water diversion project from .south to north of China.