昆明市地铁深基坑岩土工程层组划分研究  

Study on the Geotechnical Layer Group Division of Deep Foundation Pit of Subway in Kunming City

作　　者：杨文辉[1] 吴国斌 潘建华 刘伟[1] 李冬冬[2] 蒋良文[1] 张礼 YANG Wenhui;WU Guobin;PAN Jianhua;LIU Wei;LI Dongdong;JIANG Liangwen;ZHANG Li(China Railway Eryuan Engineering Group Co.,Ltd.,Kunming 650200,China;North China University of Water Resources and Electric Power,Zhengzhou 450046,China)

机构地区：[1]中铁二院工程集团有限责任公司,云南昆明650200 [2]华北水利水电大学,河南郑州450046

出　　处：《华北水利水电大学学报（自然科学版）》2023年第2期80-89,共10页Journal of North China University of Water Resources and Electric Power：Natural Science Edition

基　　金：国家自然科学基金重点项目(U1704243)。

摘　　要：昆明市地铁4号线火车北站基坑深37.1 m,针对地下水控制和支护结构工程设计问题,开展地基岩土体层组划分研究。文中提出了详细的分层依据、分层原则以及分层编码方法,将该地基分为5个主层、31个分层。根据时代成因、土层名称、土层状态对地基土进行详细分层。地基土的分类分层系统化充分体现了现行规范的思想,且分层编码的工程意义直观。以详细分层为基础,将地基概化为隔水层、隔水软弱层、透水层。将详细分层与概化分层相结合,获得详细分层的物理力学参数及设计指标,可揭示地基工程与水文地质结构的特点、规律和主要岩土工程问题,克服了目前岩土工程层组划分研究中存在的不足。The foundation pit depth of the North Railway Station of Kunming Metro Line 4 is 37.1 m.For the engineering design problems of the groundwater control and the supporting structure,the geotechnical layer group division of the foundation was researched.The detailed stratification basis,detailed stratification principle and hierarchical coding method were proposed,and the foundation was divided into 5 main layers and 31 detailed layers.According to the geologic period and the formation cause of stratum,as well as the name and state of the soil layer,detailed stratification of the foundation soil was conducted.The systematized classification and stratification of foundation soil fully embodies the thought of the current norms,and the engineering significance of hierarchical coding is intuitive.Based on the detailed stratification,the foundation was divided into water-proof layer,water-proof soft layer and water-permeable layer.By combining detailed stratification with generalized stratification,the physical and mechanical parameters and design indicators of the detailed stratification were obtained,and characteristics and laws of the foundation engineering and hydrogeological structure and the main geotechnical engineering problems were revealed,as well as the deficiencies existing in the current geotechnical engineering structure division research were overcome.

关 键 词：深基坑 层组划分 详细分层 概化分层 支护结构 

分 类 号：P642[天文地球—工程地质学]