摘要
通过分析国内外大坝基础防渗帷幕运行过程中出现的典型问题，认为影响帷幕耐久性的因素主要有4个方面：（1）施工质量的影响；（2）幕体本身密实性的影响；（3）特殊地层的影响；（4））也下水侵蚀的影响．并通过林溶试验具体研究了水泥帷幕结石在地下水侵蚀作用下CaO的溶出速率及幕体结石强度的衰减情况，最后对试验数据进行了回归分析，并结合实例尝试性地提出了推求水泥灌浆帷幕防渗有效时限的方法．
In this paper the typical problem of cement grouting curtain during working for most dam's seepage prevention base is analysed. It is concluded that there is reasons related to the durability of cement watertight screen in four: (1)the quality of grouting construction, (2 )the filling density of grout compartment, (3 )the influence of special strata behaviour, (4)the influence of corrosive water. By experiment, the cement grouting curtain's corrosive rate of CaO and its strenth's degradation rate are also studied in this paper. Moreover,a practical approach to calculate the effective watertight time-limlt of cement grouting curtain is proposed for the fisrt time in our country, by means of regression analysis.
出处
《水利水电技术》
CSCD
北大核心
1998年第6期34-37,共4页
Water Resources and Hydropower Engineering
关键词
水泥灌浆帷幕
耐久性
溶蚀
防渗
基础防渗
cement grouting curtain, durability, corrosion, effective permeability-resistant time-limit
