紧邻地铁区间的全地下污水处理厂基坑设计关键技术

Key Technology for Design of Foundation Pit in Full Underground Wastewater Treatment Plant Adjacent to Metro

以苏州市某全地下污水处理厂深大基坑为例,介绍了紧邻地铁盾构区间的深大基坑设计的关键技术,对深大基坑工程"分区顺做"的设计方法进行详细介绍,包括围护结构方案选型、基坑围护设计方案、地铁专项保护措施、实施工况等。同时针对该深基坑一侧堆载一侧临河现状,分析了偏载对深基坑的影响,为今后类似紧邻地铁盾构区间或两侧偏载的深大基坑设计提供参考。

Taking a deep and large foundation pit in a full underground wastewater treatment plant(WWTP)of Suzhou as an example, the key technology for the design of deep and large foundation pit adjacent to the shield area of metro is introduced. The design method of "zoning construction" in deep and large foundation pit project is introduced in detail including the selection of building envelope scheme, the design scheme of foundation pit enclosure, the special protection measures of metro and the construction condition of implementation. At the same time for the current situation of this deep foundation pit facing the pile loading on one side and adjacent to river on other side, the influence of unbalance loading o the deep foundation pit is analyzed, which can be referred for the design of deep and large foundation pits similarly adjacent to the shield area of metro or the unbalance loading on both sides in the future.