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前言葛洲坝水利枢纽一期工程基础中存在的软弱夹层性状差,强度指标低,是主要的工程地质问题,设计中采用的防渗排水措施,可以认为在长期渗压水作用下,软弱夹层不致于产生严重的渗透变形,危害建筑物的安全。但是,考虑到一些不利的因素,对于葛洲坝水利枢纽这样一个极为重要的工程,还必须采取必要的保护措施,以防止软弱夹层万一发生渗透变形后,不致于发展恶化,破坏基础正常工作条件,危害建筑物安全。保护对象以Ⅰ、Ⅱ类软弱泥化夹层及粘土岩夹层和断层为主。
Preface Gezhouba Water Control Project Phase I project in the existence of weak intercalated poor performance, low intensity indicators, is the main engineering geological problems, the design of seepage drainage measures can be considered in the long-term seepage pressure of water, the weak interlayer will not be caused by A serious infiltration and deformation, endanger the safety of buildings. However, taking into account some unfavorable factors, it is necessary to take the necessary protective measures against such an extremely important project as the Gezhouba Dam to prevent the infiltration and deformation of weak intercalations from deteriorating and undermining the normal working conditions of infrastructures, Harm building safety. The objects of protection are mainly Ⅰ and Ⅱ soft clay intercalations and clay interbeds and faults.