填料黏粒含量及压实过程对高填方边坡渗流场的影响规律  

Variation of seepage flow field distribution characteristics of high filling slope considering clay content of fillings and compaction

作　　者：吴红刚 谢显龙 武志信 牌立芳 WU Honggang;XIE Xianlong;WU Zhixin;PAI Lifang(China Railway Northwest Research Institute Co., Ltd, Lanzhou,Gansu 730070,China;China Iron Landslide Engineering Laboratory, Lanzhou,Gansu 730070,China;Environment Rock Soil and Site Remediation Technical Engineering Laboratory, Lanzhou,Gansu 730070,China;College of Geoscience and Environmental Engineering, Southwest Jiaotong University, Chengdu, Sichuan 611756,China;Lanzhou Jiaotong University Civil Engineering Institute, Lanzhou,Gansu 730070,China)

机构地区：[1]中铁西北科学研究院有限公司,甘肃兰州730070 [2]中国中铁滑坡工程实验室,甘肃兰州730070 [3]西部环境岩土及场地修复技术工程实验室,甘肃兰州730070 [4]西南交通大学地球科学与环境工程学院,四川成都611756 [5]兰州交通大学土木工程学院,甘肃兰州730070

出　　处：《中国地质灾害与防治学报》2019年第6期126-134,共9页The Chinese Journal of Geological Hazard and Control

基　　金：国家重点研发计划资助(2018YFC1504901);中国中铁股份公司科技开发计划(2015-重点-32);中铁科研院重点课题(2015-KJ037-G006-03)

摘　　要：高填方边坡因填方量大、填方高度高、边坡陡等特点造成其致灾原因复杂、边坡稳定性影响因素多样,尤其是基于填料、压实工艺特性造成的渗流模式差异影响地下水的赋存、运移已成为边坡失稳工程中重要的影响因素之一。本文结合攀枝花机场13#高填方应用工程实例分析,通过PLAXIS有限元计算,综合渗流分析理论及高填方边坡渗流场、位移场的分析,揭示了填方体填料、压实度差异形成不同渗流场高填方系统地下水分布及演化规律。结果表明:(1)填料及压实度通过影响填方体渗透系数进而影响填方体的流量,且地下水由于填筑影响不具有统一的地下水位。(2)纵向上位移随着渗透系数增大位移会减小;横向上由于地下水会沿着基岩—原始地面层渗出,区内滑坡的成因是由其特殊的地质结构特征及基岩-堆积层接触带水共同作用的结果。其研究结果可以为同类工程滑坡治理及地下水排水设计提供理论支撑。Due to the large amount of filling,high filling height and steep slope,the high filling slope has many complicated causes and various factors affecting slope stability.Especially,the difference of seepage model resulted from the characteristics of packing and compaction affects the occurrence and migration of groundwater,which has become one of the important factors in slope instability engineering.Based on the high fill application engineering of Panzhihua Airport,the distribution and evolution law of groundwater in high fill system with different seepage field formed by difference of filling and compaction degree of filling body were revealed in this paper through the finite element calculation of PLAXIS,as well as the comprehensive seepage analysis theory and the analysis of the seepage field and displacement field of the high fill slope.The results show that:(1)filler and compaction affect the flow of filling body by affecting the permeability coefficient of filling body,and groundwater does not have a uniform level due to the influence of filling;(2)longitudinal displacement decreased with the increase of the permeability coefficient.Meanwhile,in the lateral direction,the groundwater seepage along the bedrock-original ground layer.Landslide in the study area was induced by the special geological structural features combining with the interaction of the contact-zone water between bedrock and accumulation layer and bedrock.These study results will provide theoretical support for landslide controlling and groundwater drainage design of similar projects.

关 键 词：高填方系统 地下水 渗流理论 PLAXIS 填料 压实度 

分 类 号：P64[天文地球—地质矿产勘探]