软弱地基水上双排钢围堰应用研究

太湖隧道明挖法水上深基坑施工是本工程的重点与难点之一,本研究以太湖隧道CX-WX2标段施工为依托,通过水上明挖深基坑设计施工应用,针对工程区域表层分布深厚软弱土层、缺少砂性土填料和在围堰内回填粘性土料对双排钢围堰产生的一系列问题进行分析与研究,并提出相应的解决方法,对双排钢围堰的作用体系工作模式进行研究,最终的研究成果应用于设计施工并且顺利实施,产生了良好的经济和社会价值。

Study on Application of Double-row Steel Cofferdam on Soft Soil Foundation

The open-dredging construction of waterborne deep foundation pit was one of the key points and difficulties of Taihu Lake tunnel project.Based on CX-WX2 works of Taihu Lake tunnel,in which the above method was applied in the design and construction,a series of problems were analyzed and studied,including the thick soft soil layer distributed in the project site,the lack of sandy soil filler,and the impact on double-row steel cofferdam by filling cohesive soil into the cofferdam,etc.The corresponding solutions were proposed,the working mode of double-row steel cofferdam was studied,and the final results were applied in the design and construction well,which produced good economic and social value.