（上海岩土工程勘察设计研究院有限公司， 上海 200031）

［摘要］我国海岸线约有四分之一属于淤泥质海岸，而且每年还因吹填与疏浚会产生大片的淤泥地基，这类超软弱地基的闲置或废弃是对土地资源的极大浪费。基于合理开发利用淤泥资源的理念，本文从日本引入一种新颖的原位淤泥固化技术——SLM工法，从理论推导、数值模拟等方面深入分析淤泥地基上覆固化层的承载性能，推导出考虑应力扩散作用与封闭作用的地基临界荷载q1/4公式。同时，工程实例显示地基临界荷载q1/4的计算结果与地基承载力特征值fa的模拟结果较为接近，对今后的设计工作有一定指导意义。

［关键词］SLM工法； 淤泥地基； 固化层； 附加应力； 承载力

中图分类号： TU470 文献标识码： A文章编号：  1002-848X(2016)S1-0828-05

Analysis on the bearing capacity of the firming layer overlaying silt foundation

Shao Jie

(Shanghai Geotechnical Investigations & Design Institute Co., Ltd., Shanghai 200031, China)

Abstract: About a quarter of Chinese coast is muddy, and hydraulic filling and dredging are also producing large areas of silt foundation each year. Abandoning this kind of super-soft ground is an enormous waste of the land resources. Based on the concept of rational development and utilization of the silt resources, SLM construction method from Japan was introduced, which is a new kind of the silt-cured technology in situ. This thesis has a further analysis about the bearing performance of the firming layer overlaying silt in these ways of theoretical derivation, numerical simulation and so on, and the expression to determine the critical load (q1/4) on the foundation was presented, which considers the stress distribution and closed action of the firming layer. Meanwhile, a project example shows that the calculation result of the critical load (q1/4) is close to the simulation result of the characteristic value of subsoil bearing capacity (fa), which may provide certain guiding significance to the similar design work in the future.

Keywords: SLM construction method; silt foundation; firming layer; additional stress; bearing capacity

作者简介： 邵杰，硕士，工程师，Email：shaojie@sgidi.com。