【摘要】 运用地震波跨孔层析技术,通过最小二乘法作理论反演,分析九顶山隧道岩溶突水灾变机理是由于隧洞开挖,上方全风化花岗岩受开挖扰动,松动破裂,与上方灰岩裂隙水连通,在水的软化作用下,岩体崩解破坏,并针对性的提出"探"—跨孔CT与地质调查结合的超前探测;"截"—对洞顶地表的陷穴、深坑加以回填,对裂缝进行堵塞,截断地表水补给;"泄"—右幅拱腰采用PRD-180CBR型多功能钻机,安装倾角35°,深度为45 m,管径108 mm的泄水管;"帷"—使用多功能钻机钻孔注浆一体化工艺进行全断面帷幕注浆等措施,使隧道安全通过岩溶富水段,为九顶山隧道施工提供防治施工措施。更多还原

【Abstract】 The seismic wave cross-hole tomography technology and the least square method is used for theoretical inversion to analyze the mechanism of karst sudden flood in Jiudingshan tunnel. The results show that the reason is mainly due to the excavation of the tunnel. During the excavation process, the fully weathered granite above is disturbed, therefore looseness and rupture happens, which is connected with the limestone fissure water above. Under the softening effect of water, the rock mass is disintegrated and destroyed, and the targeted "exploration"-cross-hole CT combined with geological survey is proposed to further explore the reason. Measures such as "interception" which means backfill the holes and deep pits on the roof of the cave, and plug the cracks and cut off the surface water supply; "drain" during which PRD-180 CBR type multifunctional drilling machine is used for the right arch waist, and drain pipes with an inclination of 35°, a depth of 45 m and a pipe diameter of 108 mm are installed; "Curtain" during which full-face curtain grouting and other measures are carried out by using the integrated drilling and grouting technology of multi-function drilling machine to make the tunnel pass through the karst water-rich section safely. And to provide prevention and control measures for Jiudingshan tunnel更多还原