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中文摘要：
海相深厚软土地基的处理，施工手段或相关参数选择比较单一，导致地基处理不够科学、合理，并造成了资源上与经济上的一定浪费。为了优化成本，通过分析几种常见的传统单一处理方法的优缺点与适用性，介绍多元复合地基的概念、分类与特点。依托福建平潭市政道路项目，推广采用多元复合地基，即水泥搅拌桩－ CFG 桩耦合处理技术，对海相深厚软土地基进行处理。通过方案比选，在满足沉降要求的基础上，优化了地基布置，节约了近9％的造价。
英文摘要：
The methods and parameters of the solutions of deep marine soft soil are often relatively simple ,which always results in unsuitable foundation treatments ,and waste of expenses and resources .In order to save the cost ,the concept , classification and characteristics of multiple composite foundation were introduced by analyzing the advantages ,disadvan-tages and applicability of several conventional simple processing methods .The multiple composite foundation ,i .e .ce-ment mixing pile and cement fly-ash gravel pile coupled treatment technology ,was proposed to treat deep marine soft soil foundation in the municipal road projects in Pingtan ,Fujian Province .According to the requirements of allowable settle-ment ,the scheme comparison was carried out to optimize the arrangement of foundation ,which saved about 9 percent cost of this project .
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