老挝东泰矿区膨胀性红黏土工程地质特征及评价
Engineering Geological Characteristics and Evaluation of expansive red clay in Dongtai Mining Area,Laos
吴卫卫 1彭明章 1张利军 1张建 1刘晓东1
作者信息
- 1. 中化地质矿山总局山东地质勘查院,山东 济南 250013
- 折叠
摘要
膨胀性红黏土是一种不良的地基土,是工程建设的难题.文中以老挝东泰矿区改扩建项目为例,通过详细的岩土工程勘察工作,查明研究区内膨胀性红黏土具有孔隙比大、高液限、高塑限的特征,物理力学性质较差,属弱膨胀土,地基胀缩等级为Ⅱ级.基于其工程地质特征,提出研究区膨胀性红黏土作为浅基础直接持力层时,可采用换土、砂石垫层、土性改良等地基处理措施;基坑工程及边坡工程应采取防排水措施与坡面封闭措施;膨胀性红黏土应对其进行土性改良后,再作为工程填料使用.
Abstract
Expansive red clay is a kind of bad foundation soil,the processing to which is a difficult problem in engineering construction.Taking the reconstruction and expansion project of Dongtai mining area in Laos as an example,through detailed geotechnical engineering reconnaissance,the expansive red clay in the study area has the characteristics of large pore ratio,high fluid limit and high plastic limit.The physical and mechanical properties are poor,it is weak expansion soil,.The foundation expansion and contraction grade is the grade II.Based on the engineering geological characteristics,when the expansion of red clay in the study area is used as the direct bearing layer of shallow foundation,the foundation processing measures such as soil replacement,sand and stone cushion and soil improvement can be adopted;Drainage measures and slope sealing measures shall be adopted for foundation pit works and slope works;and the expansive red clay should be improved in soil and then be used as engineering filler.
关键词
老挝/膨胀性土/红黏土/工程地质特征Key words
Laos/Expansive soil/Red clay/Engineering geological characteristics引用本文复制引用
基金项目
老挝东泰矿区100万t/年钾肥改扩建项目(GK2020013)
出版年
2024
国家科技期刊平台
NSTL
万方数据