膨胀性裂土病害产生机理及综合防治措施研究  

Research on the mechanism and comprehensiveprevention and control measures of expansive cracked soil disease

作　　者：张德龙 苗学云 沈朝政 Zhang Delong;Miao Xueyun;Shen Chaozheng(Qinghai-Tibet Railway Group Co.,Ltd.Golmud Works Section,Golmud Qinghai 816000,China;China Railway Northwest Research Institute Co.,Ltd.,Lanzhou Gansu 730000,China;Qinghai Key Laboratory of Frozen Soil and Environmental Engineering,Golmud Qinghai 816000,China;School of Transportation Engineering,Nanjing University of Technology,Nanjing Jiangsu 210009,China)

机构地区：[1]青藏铁路集团有限公司格尔木工务段,青海格尔木816000 [2]中铁西北科学研究院有限公司,甘肃兰州730000 [3]青海省冻土与环境工程重点实验室,青海格尔木816000 [4]南京工业大学交通运输工程学院,江苏南京210009

出　　处：《山西建筑》2024年第3期82-85,89,共5页Shanxi Architecture

基　　金：中国国家铁路集团有限公司科技研究开发计划(P2021G047);中铁西北院科技开发项目(2023XBK03);中国铁路青藏集团有限公司科技研究开发计划课题(QZ2023-G01)

摘　　要：膨胀土是指吸水后显著膨胀、失水后显著收缩的高塑性黏土,随着膨胀土问题的日渐加剧,膨胀土对施工环境的影响已成为当今岩土工程中亟待解决的全球性技术难题之一。在文献调研、资料收集及成果汇总的基础上,对膨胀土的基本性质、胀缩机理进行了总结,从病害产生部位、形态特征、成因及破坏速度等角度系统划分了膨胀土“四类”破坏类型;通过堑坡深度、垂直方向、坡顶及坡底水平方向变形量提出了膨胀土堑坡“四个”活动层面;结合膨胀土地区路基、边坡、建筑物及其他各类病害特点,总结了相对应的技术措施,研究成果对于膨胀土地区在建和拟建工程有参考意义。Expansive soil is a kind of high plastic clay that expands significantly after absorbing water and shrinks significantly after losing water.With the increasing problem of expansive soil,the influence of expansive soil on construction environment has become one of the global technical problems to be solved urgently in geotechnical engineering.On the basis of literature research,data collection and results summary,the basic properties and swelling-shrinkage mechanism of expansive soil are summarized,and the“four types”damage types of expansive soil are systematically divided from the perspectives of disease location,morphological characteristics,causes and failure speed.The“four”active layers of expansive soil cutting slope are put forward through the deformation of cutting slope depth,vertical direction,slope top and bottom horizontal direction.Combined with the characteristics of subgrade,slope,building and other diseases in expansive soil area,the corresponding technical measures are summarized.The research results provide technical guidance for the construction and proposed projects in expansive soil area.

关 键 词：膨胀土 胀缩性 堑坡稳定性 破坏类型 病害防治 

分 类 号：TU443[建筑科学—岩土工程]