桂林理工大学学报2024，Vol.44Issue(2)：248-254,7.DOI:10.3969/j.issn.1674-9057.2024.02.008
桂东南泥盆系莲花山组泥岩膨胀性研究
Swelling property of mudstone of the Devonian Lianhuashan Formation in southeast Guangxi
摘要
Abstract
The swellability of mudstone has important influence on slope stability and other geotechnical engi-neering.Lianhuashan Formation of the Devonian is developed in Cenxi City,central of southeast Guangxi.It is mainly distributed in a small scale in the low hill area of the stripped and dissolved ridges and valleys geomor-phologic area.In order to find out the dilatability of the mudstone in this area,this study has carried out geolog-ical mapping,drilling,field test,laboratory geotechnical test and X-ray diffraction analysis to determine the macro-characteristics and physical and mechanical properties of the mudstone.The swelling property of mud-stone is studied by the comprehensive evaluation method of macroscopic preliminary judgment—physical and mechanical indexes quantitative initial judgment—Gaussian process quantitative detailed judgment.The physical and mechanical indexes are selected as effective montmorillonite content,<2 μm colloidal content,liquid lim-it,plastic index and total swelling and shrinkage ratio,and the quantitative criterion of swelling property is giv-en.The five indexes of mudstone in the study area are 22%-33%,20%-33%,46.8%-78.0%,24.1-42.9 and 1.3%-5.2%,respectively.It is concluded that the mudstone in the study area has moderate to strong swellability.关键词
泥岩/膨胀性/高斯过程/莲花山组/泥盆系/桂东南Key words
mudstone/swellabitity/Gaussian process/Lianhuashan Formation/Devonian/southeast Guangxi分类
地质学引用本文复制引用
刘小明,刘振宇,江思义,黄海,李海良,陈德斌..桂东南泥盆系莲花山组泥岩膨胀性研究[J].桂林理工大学学报,2024,44(2):248-254,7.基金项目
广西重点研发计划项目(桂科AB21196041) （桂科AB21196041）
