长江漫滩区域基坑支护和土方开挖施工中的问题及其对策

Some Problems and Countermeasure in Construction of Earth Excavation and Foundation Pit Supporting in Flood Land Area of Yangtse River

长三角地区很多城市处于长江漫滩地区,土体一般处于塑性状态,极易变形,地质条件很差。在这种情况下,如何合理选择支护设计及土方开挖施工方案,在安全、合理的前提下,做到既经济又保证工程进度,是一个值得探讨的问题。本文结合工程实例对软土地区基坑支护及土方开挖过程中出现的一些问题进行了初步的分析并得出一些有益的结论。

Thereare some cites in Yangtse River Delta area situated in flood land area with its soil body in plastic state and easy to be deformed under such bad geological condition. The paper desribes how to choose a reasonable supporting design and earth excavation plan for garanteeing not only safety and reasonable, but also ecenomic construction , combined with enginening practice, some problems in foundation pit supporting and earth excavation process in soft soil area are analysed and a lot of beneficial results have been desribed in this paper.