西夏渠隧洞工程降排水施工技术研究

通过对西夏渠隧洞工程施工中采取的地表降水、作业面辅助降水等方案的论述,总结了在第三系渐新统清水营组（E3q）砂岩或砂质泥岩地质条件下,隧洞洞身位于地下水位线以下时,应如何根据具体的地质条件,制定切实有效的洞内外降排水方案,消除岩体孔隙水、裂隙水或层间水,以及渗漏水或承压水的危害,避免在隧洞工程施工发生流砂现象和围岩坍塌现象,有效保证施工安全和工程质量,节约工程成本。

On Precipitation and Drainage Construction Technologies in Xixia Canal Tunnel Engineering

Through elaboration on the schemes of surface precipitation and precipitation assisted on the working plane,which are adopted in Xixia Canal Tunnel engineering,this paper summarizes the forulation of effective precipitation and drainage schemes in and outside the tunnels according to real geologic conditions,when the tunnel body is under the ground water table,in the geologic conditions of sandstone and sandy marl in E3q.Water in rock void water,crevice water or interlayer water,and the damages of leaking w...