加筋水泥土搅拌桩在长江堤防中的应用

Application of reinforced cement-earth mixed pile in Yangtze embankment

湖北省咸宁市邱家湾护岸段是老险工段 ,岸坡工程地质条件差 ,近年多处发生滑塌 ,严重影响堤防安全 ,经研究分析 ,滑塌体治理方案应用了加筋水泥土搅拌桩新技术 ,该方法技术先进 ,比钻孔灌注桩方案经济。加筋水泥土搅拌桩多应用于工民建基坑支护及房屋地基加固中 ,在近年实施的堤防隐蔽工程建设中常采用多头或单头水泥土搅拌桩组成连续结构 ,用于堤身和堤基的防渗措施中 ,但采用加筋水泥土搅拌群桩作为受力结构使用 ,对长江堤防岸坡滑塌体进行整治尚属首次 ,经分析 ,其技术上是可行的 ,施工也比混凝土钻孔灌注桩方案方便 ,邱家湾其它 3个滑塌体的治理均采用该方法进行了整治。工程直接费比混凝土钻孔灌注桩方案节省投资 1

Qiujiawan bank revetment section in Xianning city of Hubei province was a dangerous old one, landslides of the bank slope occurred at several places in recent years due to poor engineering geological conditions, posing a serious threat to the safety of the dyke. Through investigation and analysis, reinforced cement earth mixed piles were applied to the treatment of landslide bodies. This method is advanced in technology and is more economic than that of bored concrete piles. Reinforced cement earth mixed piles were mostly used for supporting foundation pits of industrial and civil buildings and for strengthening subgrade of buildings. In recent years, a continuous structure consisting of cement earth mixed piles constructed with a multi or single head agitating device was always used for seepage control in dyke body and dyke foundation. However it was the first time for reinforced cement earth mixed pile groups to have heen used as stressing structures for the treatment of bank landslides of the Yangtze River dyke. Through analysis, reinforced cement earth mixed piles are feasible in technology and are relatively convenient for construction compared with bored concrete piles. 3 landsides of Qiujiawan bank revetment section were all treated by this method, resulting their direct investment being 1.97 million yuan less than that for bored concrete piles.