延安新区回填压实黄土压缩变形与湿陷特性  

Compression Deformation and Collapsible Characteristics of Compacted Backfill Loess in Yan'an New District

作　　者：殷鹤 黄雪峰[1,2] 李旭东[3] 周俊鹏[1,2] 

机构地区：[1]后勤工程学院军事土木工程系,重庆401311 [2]后勤工程学院岩土力学与地质环境保护重庆市重点实验室,重庆401311 [3]海军工程设计研究院,北京100070

出　　处：《后勤工程学院学报》2016年第3期26-32,共7页Journal of Logistical Engineering University

基　　金：陕西省科技统筹创新工程计划项目(2012KTDZD03-04)

摘　　要：为深入研究回填压实黄土的压缩变形特性与湿陷变形特性,对新区高填方33 m深度范围内的回填压实黄土开展了一系列室内压缩、固结、湿陷试验。研究结果表明:高填方不同深度现场回填压实黄土均具有中、高压缩性;结构屈服压力对现场回填压实黄土的压缩变形特性和湿陷变形特性均有较大影响,在含水率和压实度相近条件下,结构屈服压力越大,回填压实黄土的压缩性越小;不同深度的现场回填压实黄土均有湿陷性,且均存在峰值湿陷系数,峰值湿陷压力出现在其结构屈服压力附近。试验成果可为制订黄土高填方的施工质量标准提供参考依据。In order to study the compression deformation and collapsible characteristics of compacted backfill loess in Yan an new district,a series of compression deformation and collapsibility tests were carried out on the loess which were taken from 33 m highfill ground in Yan＇ an new district.According to the test results,different depth of compacted backfill loess had medium or high compressibility.The structural yield pressure had a great influence on the compression deformation and collapsible characteristics of compacted backfill loess.Under the similar condition of moisture content and degree of compaction,the compressibility of loess decreased with increasing of structural yield pressure.Different depth of compacted backfill loess had collapsible characteristics and peak coefficient of collapse.The peak pressure of collapse appeared near the structural yield pressure.The test results provide a basis for setting quality standards of loess highfill.

关 键 词：高填方 回填压实黄土 结构屈服压力 压缩变形 湿陷性 

分 类 号：TU44[建筑科学—岩土工程]