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研究目的: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: To obtain the combination mechanism to deal with deep layer of soft soil mechanism, settlement, pile-soil load sharing and other characteristics, to provide a basis for determining the design and calculation methods. Research conclusions: After adding a long plastic drainage board to the composite foundation of mixing pile: (1) It can speed up the consolidation of drainage and consolidation in deep soft soil so as to speed up the completion of settlement of foundation soil and reduce post-construction settlement; ( 2) to speed up the development of lateral displacement, and its development and drainage conditions are closely related; (3) soil strength increased rapidly, pile-soil stress ratio was significantly less than the mixing pile composite foundation, indicating that the foundation is more conducive to the bearing capacity of the foundation soil Play