中小型水库土石坝除险加固施工技术
2012-10-15胡淑芳
胡淑芳
摘要:水库既是水源工程,又是防洪工程,在防御洪水灾害和保障国民经济建设中发挥着重要作用。但由于各种原因,目前,有许多中小型水库存在着渗漏严重、防洪标准偏低,达不到有关规范、规定要求或者工程本身质量差,工程老化失修等问题,形成了大量的病险水库,工程不能正常运行,发挥其兴利效益,同时存在严重的安全隐患,严重威胁着下游人民生命财产的安全。笔者就某中小型水库出现病险的原因分析,针对了中小型水库除险加固具有一定的借鉴作用。
关键词:中小型水库;除险加固;施工技术
Abstract: water reservoir is both engineering and flood control works and flood prevention disaster and security in the national economic construction plays an important role. But because all sorts of reasons, there are many small and medium-sized reservoirs exists serious leakage, low flood control standard, short of relevant standards, regulations or project itself poor quality, engineering aging problem such as repair, formed a lot of seepage path reservoir, the project can not run normally, play its economical benefits, and there are serious security hidden danger, a serious threat to people's life and property safety of downstream. The author is a small and medium reservoir appear the seepage path of reason analysis, according to the problems of small and medium-sized reservoirs is of certain reference to the reinforcement.
Keywords: small and medium-sized reservoirs; Strengthening problems; Construction technology
中图分类号:TU74文献标识码:A 文章编号:
前言
全国是个农业大国,水利工程尤为重要,而大多水库都建立在建国后期,由于技术有限水库都存在或大或小的危情。病险水库数量较大,问题复杂,除险加固治理是一项十分复杂的工程,近年来国家不断下拨巨资在全国范围内对病险水库进行拉网式除险加固建设,这将对其起到起死回生的作用,在水资源日益贫乏的今天,水库的功能恢复将对国家经济建设起到巨大的推动作用。
1 土坝裂疑的处理
裂缝对土坝危害较大,特别是贯穿坝本的横向裂缝和水平裂缝,以及滑坡裂缝。对非滑动性裂缝处理,多采用开挖回填的办法。
(1)如裂缝宽度不大,深度在1m以内,且已稳定,一般可用于细的沙壤土,从缝口灌入,在用竹条木棍捣实,重要的和比较重要的中小型水库最好挖槽到裂缝深度以下0.3m,然后回填夯实,处理工作可分段进行,同时注意新老土的结合。……