安徽省长江干堤的几种加固措施

安徽省境内765km的长江干堤，由于均是在原来旧堤的基础上经逐年加高培厚的，修筑时均未按设计要求施工，致使堤身密实度不够，新老堤土之间结合不牢，在汛期高水位时易产生渗漏。20世纪70年代以来，安徽省高度重视对长江干堤渗漏隐患的处理，经过长期的实践，逐渐摸索出一套行之有效的除险加固方法，如锥探灌浆、灭杀白蚁、冲抓套吉、垂直铺塑防渗、粘土铺盖及压渗盖重等处理措施。使长江干堤的渗漏隐患得以基本消除，其具体作法可供类似工程借鉴。

Several measures for strengthening the main dyke of Yangtze in Anhui province

Since the 756-km Yangtze dyke in Anhui province was heightened and widened year after year,the dyke did not have enough compactness,and the combination of new earth fill and old earth fill was not firm,resulting in water leakage in high water periods.Since 1970 s,Anhui provincial government has paid special attention to the treatment of the hidden leakage defects in the main dyke along the Yangtze river.Through long-term practice of embankment repair,a set of effective methods for strengthening dykes and removing hidden dangers,for example,cone penetration and grouting,killing white ants,providing wells by hammer grab then having them filled with clay,vertical geomembrane seepage control curtains,clay blanket,counter weight fill against seepage etc.The hidden leakage defects of the main dyke along the Yangtze river are basically removed by taking these measures.