武汉长江Ⅰ级阶地原状土样获取技术研究  

Research on technology of obtaining undisturbed soil samples from Wuhan first stage terrace of the Yangtze River

作　　者：李光诚 邵勇 伊盼盼[2] 李玉才 王璐 孔凡水 鲁雄波 LI Guangcheng;SHAO Yong;YI Panpan;LI Yucai;WANG Lu;KONG Fanshui;LU Xiongbo(Hubei Institute of Urban Geological Engineering,Wuhan Hubei 430050,China;Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan Hubei 430061,China;Hubei Geological Build Prospecting&Engineering Co.,Ltd.,Wuhan Hubei 430050,China)

机构地区：[1]湖北省城市地质工程院,湖北武汉430050 [2]中国科学院武汉岩土力学研究所,湖北武汉430061 [3]湖北地矿建设勘察有限公司,湖北武汉430050

出　　处：《钻探工程》2024年第4期163-171,共9页Drilling Engineering

基　　金：国家自然科学基金项目“降雨入渗激励下非饱和成层土边坡的优势流动机理与稳定性分析”(编号:12002243);湖北省地质局科技项目“武汉地区基坑开挖数值分析中土体硬化模型参数的试验研究”(编号:KJ2023-46);湖北省教育厅科学研究计划项目“坡体裂隙劣化的力学机理及互补模型研究”(编号:B2020254)。

摘　　要：本文分析了原状土样获取的技术标准现状和行业现状,研究了钻进方式、取样工具选取的适宜性综合分析、土样的封装及运输。对比试验研究表明,在武汉长江Ⅰ级阶地粘土层段采用锤击钻进配合使用敞口薄壁取土器,在砂土层采用锤击和回转组合钻进配合使用内置环刀取土器,辅以胶盖自封和胶带密封,取得的原状样品在现场质量评测、室内样品制备性和试验性方面均有比较良好的表现,基于此套方法获取的原状样原始结构受扰动较小,土的原始结构力保持良好。In this paper,the current technical standards and industry status for obtaining undisturbed soil samples is introduced,moreover,the drilling methods,comprehensive analysis of suitability for sampling tool selection,soil sample packaging and transportation methods are studied.The comparative experimental research indicates that the original obtained samples show excellent performance in on‑site quality evaluation,indoor sample preparation,and experimental performance under the following two conditions in Wuhan first stage terrace of the Yangtze River.In clay laye,hammer drilling combined with open thin‑walled soil samplers is adopted,while in sandy soil layer,the hammer and rotary drilling combined with built‑in ring cutter soil sampler is used supplemented by rubber cover and tape sealing.Based on this method,the original structure of the sample is less disturbed,and the original structural force of the soil is also well maintained.

关 键 词：原状样 取土器 工程勘察 土工试验 锤击钻进 回转钻进 武汉长江Ⅰ级阶地 

分 类 号：TU412[建筑科学—岩土工程] P634[建筑科学—土工工程]