沧州典型地面沉降区土体压缩与固结特征研究  

A study on compression and consolidation behaviors of soils in typical landsubsidence area in Cangzhou

作　　者：王云龙[1] 郭海朋[1] 孟静[2] 陈晔 臧西胜 朱菊艳[1] 樊高栋 WANG Yun-long;GUO Hai-peng;MENG Jing;CHEN Ye;ZANG Xi-sheng;ZHU Ju-yan;FAN Gua-dong(China Institute of Geo-Environment Monitoring,Beijing 100081,China;Institute of Geomechanics,Chinese Academy of Geological Sciences,Beijing 100081,China;China University of Geosciences(Beijing),Beijing 100083,China)

机构地区：[1]中国地质环境监测院,北京10081 [2]中国地质科学院地质力学研究所,北京10081 [3]中国地质大学(北京),北京10083

出　　处：《地质调查与研究》2020年第3期246-250,278,共6页Geological Survey and Research

基　　金：国家自然科学基金“复杂含水层系统中地下水位变化驱动下的土层变形特征及其机制(41877294)”;中国地质调查局项目“京津冀地区地质环境综合调查与监测(DD20190679)”;“自然资源部京津冀平原地下水与地面沉降野外科学观测研究站”。

摘　　要：近年沧州市地面沉降主要发展于其市区地下水位降落漏斗中心及邻近郊县的水位漏斗区域。本文以沧州市区钻孔土样为研究对象,通过常规物理测试及不同压力等级下的高压固结试验,分析了土样各物理指标之间的关系,颗粒结构与土体压缩的关系。对土体在不同深度和压力变化下的压缩变形、压缩系数及固结特征进行了研究,得出压缩系数和固结压力在双对数坐标下能呈现出很好的线性关系。对沧州地区以粘性土压缩变形引起的地面沉降研究提供数据支撑。In recent years,the land subsidence in Cangzou city is mainly developed in the groundwater depression cone belonging to urban area and adjacent suburban districts..In this paper,the borehole soil samples were mentioned as the research object.Through normal physical experiments and high pressure consolidation tests under different levels,the regularity about the soil physical indexes,the characteristics of soil compression and consolidation in different conditions of depth and loads had been discussed.It is also concluded that the compression coefficient and consolidation pressure can present an obviously linear relation in the logarithmic coordinate system,which can provide data support for the research on the land subsidence caused by the compression deformation of cohesive soil in Cangzhou area.

关 键 词：沧州 地面沉降 压缩变形 固结特征 

分 类 号：P642.26[天文地球—工程地质学]