礼让隧道石膏岩段防排水措施分析

Waterproof and Drainage Measures of Lirang Tunnel in Gypsolyte Section

近年来,随着我国公路、铁路建设事业的发展,许多隧道工程面临穿越石膏岩层的问题。石膏岩是一类特殊的软岩,在地下水的作用下,表现出膨胀性和对混凝土结构的腐蚀性,会严重危害隧道工程的稳定性。因此,做好防排水工作,防止腐蚀性地下水与石膏围岩和衬砌结构的接触,是从源头上解决石膏岩隧道工程问题的方法。以礼让隧道石膏段为背景,分析了该段的水文地质条件,研究了该段的防排水设计,并提出了一系列具体的措施,能很好地指导现场施工。

In recent years,with the development of road and railway in China,many tunnel projects have to face the problem of being constructed in gypsolyte section. Gypsum is a special soft rock which will be swelling or leading to corrosion of concrete under the action of the ground water,and it will seriously endanger the stability of tunnel engineering. Therefore,a good waterproof and drainage measures of preventing the contact between corrosive groundwater and gypsum surrounding rock lining structure are methods to solve the engineering problem of the gypsolyte tunnel. Taking Lirang Tunnel as the background,this paper analyzes the hydrogeological conditions of this section,studies the design of waterproof and drainage and provides a series of concrete measures which would be a very good guide to the construction site.