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（上海巖土工程勘察設(shè)計(jì)研究院有限公司， 上海 200031）

［摘要］我國(guó)海岸線約有四分之一屬于淤泥質(zhì)海岸，而且每年還因吹填與疏浚會(huì)產(chǎn)生大片的淤泥地基，這類超軟弱地基的閑置或廢棄是對(duì)土地資源的極大浪費(fèi)?；诤侠黹_發(fā)利用淤泥資源的理念，本文從日本引入一種新穎的原位淤泥固化技術(shù)——SLM工法，從理論推導(dǎo)、數(shù)值模擬等方面深入分析淤泥地基上覆固化層的承載性能，推導(dǎo)出考慮應(yīng)力擴(kuò)散作用與封閉作用的地基臨界荷載q1/4公式。同時(shí)，工程實(shí)例顯示地基臨界荷載q1/4的計(jì)算結(jié)果與地基承載力特征值fa的模擬結(jié)果較為接近，對(duì)今后的設(shè)計(jì)工作有一定指導(dǎo)意義。

［關(guān)鍵詞］SLM工法； 淤泥地基； 固化層； 附加應(yīng)力； 承載力

中圖分類號(hào)： TU470 文獻(xiàn)標(biāo)識(shí)碼： A文章編號(hào)：  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

作者簡(jiǎn)介： 邵杰，碩士，工程師，Email：shaojie@sgidi.com。