获得组合措施处理深厚层软土的作用机理、沉降、桩一土荷载分担等特性,为确定设计计算方法提供依据.研究结论:在搅拌桩复合地基中加入较长的塑料排水板后:(1)可以起到加快深厚软土层排水固结的作用,从而加快地基土沉降完成速度,减小工后沉降；(2)加快侧向位移的发展,且其发展与排水条件密切相关；(3)地基土强度提高较快,桩土应力比明显小于搅拌桩复合地基,表明其地基更有利于地基土承载作用的发挥.%Research purposes: The purpose is to obtain characteristics of the action mechanism, the settlement and the load bearing of the pile - soil when reinforcing the deep buried soft soil by taking the comprehensive measures for providing the basis for determining the design calculation method.Research conclusions: After inserting the plastic drainage board in the composite foundation of the cement deep mixing pile,the effects of the drainage and consolidation in the deep buried soft soil can be speeded up to speed up the completion of the foundation settlement to reduce the post - construction settlement, the displacement development in the side direction can be speeded up and it is closely related to the drainage condition, and the improvement of the strength of the foundation soil can be speeded up and the stress ratio of the pile - soil is obviously smaller than the composite foundation of cement deep mixing pile and it favors for giving the play the load bearing capacity of the foundation soil.
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