复杂环境下大面积基坑分块施工法

分块施工法是将面积大、形状不规则的基坑工程划分为若干块,分别进行围护结构、土方及基础底板施工.结合上海某超大商业中心地下工程施工实例,在复杂的施工环境下,提出了超大不规则深基坑工程分块施工法的施工技术.分别从工艺特点、基坑围护结构设计、施工方法等介绍了分块施工法的技术要求和注意事项.结果表明,此法安全、经济、占地少,具有较大推广和应用前景.

A Block Segmentation Method for Large Foundation Construction Under Complex Situation

This paper aims to introduce the block segmentation method for large foundation construction under complex situation.The block segmentation method is to divide a large pit area,which has irregular shape,into several pieces,and then to respectively undertake further actions such as design and construction of retaining structure,earthworks and foundation baseboard.Based on the example of a large commercial centre underground construction in Shanghai,this paper provides further discussion to demonstrate the advantages of using the block segmentation method.It is concluded that the proposed method has advantages in safety,low cost and little land use,and it is expected to promote this method for a wide use.