Considering the high cost for Iining pressure tunnel a considerabie economic advantage can be obtained if pressure tunnels keep unlined completely or only partly.
由于衬砌水电站压力隧洞费用极高，如果能取消、即使部分取消压力隧洞的钢板衬砌，将能得到极大的经济效益。
This paper presents a high pressure permeability measurement technique in boreholes and its application for pressure tunnels.
介绍了钻孔高压压水测试技术，并结合其在工程中的具体应用做了初步分析。
Soft rock tunnels have the characteristics of high ground pressure and large deformation and are difficult to be supported. So they can not be easily controlled with single support method.
软岩巷道多具有高应力、变形大、难支护等工程特征，单一支护方式难以控制围岩变形。
The cause for leaking in tunnels and application of high pressure pouring machine in Shanghai Subway line2a re intro-duced. And comparison between old and new construction methods is made.
介绍了隧道漏水成因，以及高压灌机在上海地铁明珠二号线堵漏工程中的应用情况和新旧工法的对比。
The cause for leaking in tunnels and application of high pressure pouring machine in Shanghai Subway line2a re intro-duced. And comparison between old and new construction methods is made.
介绍了隧道漏水成因，以及高压灌机在上海地铁明珠二号线堵漏工程中的应用情况和新旧工法的对比。
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