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软土地区由于土体的自稳能力差、侧壁易变形,往往基坑支护费用较高,设计时需要综合考虑经济性和施工难度,选择合理的设计方案。以天津滨海软土地区某污水处理厂粗格栅及进水泵房工程为背景,对占地面积小而埋置深度深的典型给排水构筑物采用主体结构+深基坑支护与沉并结构的方案进行比较,通过工程造价、实施难度等方面综合比选,推荐沉井结构为实施方案。
Due to the poor self-stability of the soil and the deformation of the side walls in the soft soil area, the expense of supporting the foundation pit is often high. Therefore, the design needs comprehensive consideration of economy and construction difficulty, and selects a reasonable design scheme. Taking the coarse grille and water pump house project of a WWTP in Tianjin Binhai soft soil area as the background, the typical drainage and drainage structures with small area and deep depth of embankment are constructed with main structure + deep foundation pit supporting and sinking structure Program comparison, through the project cost, the difficulty of implementation of a comprehensive comparison and selection, recommended caisson structure for the implementation of the program.