Many indexes can be used to reflect character of expanded soil. They are divided into mineral composition and engineering behavior.
反映膨胀土土质与土体特性的指标很多，可分为反映矿物组成和工程特性的指标两大类。
The behavior of pile raft foundation in soft soil is a very important problem in geotechnical engineering.
软弱地基中桩筏基础的研究一直是岩土工程中的一个重要课题，也是土木工程设计的一项关键技术。
Author go over the number of papers about engineering behavior of embankment fill, summarize and analysis the mechanism of compacted soil.
作者查阅了国内外大量填方土体的工程性状研究文献，在前人基础上，总结分析了压实土的强度机理。
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