沿海地区软弱下卧层地基处理方式浅析

Analysis on the Treatment of Soft Substratum Foundation in Coastal Area

摘要:

沿海地区的软弱土以及不良土是工程建设中常遇到并且比较棘手的问题，特别是处理场地受限于轨道交通等地下构筑物限界时，难度更大。拟处理的软卧地基为江苏沿海某城市规划轨道交通线上的软弱地基，由于地基下埋设远期规划的轨道交通线，处理深度受限，最终处理方式确定为咬合排桩方式，设计验算采用实体深基础方法并运用MIDAS gts 软件进行复核性验算。

关键词:软土地基;水泥土搅拌桩;应力扩散角

Abstract:

Either weak or bad soil is often encountered in the engineering construction projects of coastal areas. It is a difficult problem, especially when the construction site is limited by the boundary of underground structures such as rail transit. The soft foundation to be treated in this paper is that of a planned urban rail transit line in the coastal area of Jiangsu Province. Because the long-term planned rail transit line is buried under the foundation, the treatment depth is limited, and the final treatment method is determined to be the interlocking pile arrangement. The solid deep foundation method and Midas GTS software are used for the design and checking calculation.

Key words:soft soil foundation, high pressure jet grouting pile, diffusion angle