延安新区大厚度压实填土地基均匀性评价

Uniformity Evaluation of Compacted Fill Foundation with Large Thickness in Yan’an New District

延安新区大厚度压实填土由于其形成过程的特殊性,现行规范对其地基均匀性评价无具体的评价依据和判定准则。在研究了压实填土的工程性质和差异沉降影响因素的基础上,创新性地提出压实填土地基差异沉降敏感度概念,并给出了具体的地基均匀性判定方法,便于进行压实填土地基均匀性评价,为建筑物总平面布置、地基处理及基础设计提供依据。大厚度压实填土不均匀地基不仅应进行针对性的地基处理,还应采取必要的结构措施,并加强建筑物沉降观测,以进行长期深入研究。

Due to the particularity of the formation process of large-thickness compacted fill in Yan’an New Area,there is no specific evaluation basis and criterion for the uniformity evaluation of its foundation in current codes.On the basis of the engineering properties of compacted fill and the influencing factors of differential settlement,a concept of differential settlement sensitivity of compacted fill foundation is proposed innovatively,and a concrete method to determine the uniformity of compacted fill foundation is introduced,which is convenient to evaluate the uniformity.It provides a basis for general layout of buildings,foundation treatment and foundation design.The non-uniform foundation with large thickness compacted fill should be treated pertinently,and necessary structural measures should also be carried out.Settlement observation of buildings should be strengthened for thorough long-term study.