某软土基坑支护设计实践与分析  

Practice and Analysis of Deep Excavation Support in Soft Soils

作　　者：王海成 王卫 张龙 WANG Haicheng;WANG Wei;ZHANG Long(China Machinery TIDI Geotechnical Engineering Co.Ltd.,Wuhan 430074)

机构地区：[1]中机三勘岩土工程有限公司,武汉430074

出　　处：《土工基础》2022年第2期168-172,共5页Soil Engineering and Foundation

摘　　要：基坑工程属于综合性较强的岩土工程问题。基坑工程从初期的支护方案设计到最终落地实施,全过程受到众多因素的影响,如:方案的可行性、安全经济、环境条件、地层情况、现场施工超载等。结合武汉市某复杂环境的软土基坑设计案例,介绍了该软土基坑支护设计需考虑的重点与难点。该基坑紧邻市政道路、老旧房屋及加油站,根据环境条件采用了双排桩+被动区加固、排桩+内支撑的支护方案,同时由于地勘资料的调整又对已施工的局部支护体系做了加固设计,保证了基坑工程的安全,对类似工程具有一定的借鉴意义。In the area of geotechnical engineering practice,the deep excavation engineering requires complicated and comprehensive approach for a better solution.A deep excavation project,from the initial selectin of the method of support of excavation to the final implementation and construction of supporting structures,many factors could potentially affect its success.These factors include,but not limit to,feasibility of the supporting structures,construction safety of cost considerations,adjacent environmental conditions,subsurface conditions and construction equipment loadings.This paper presents an urban deep excavation supporting design in the soft soil area case history.Factors and challenges in the deep excavation supporting structure design is also introduced.The project was surrounded by the municipal streets,existing building structures and a gas station and the excavation support design utilized double-row soldier pile plus strengthening in the passive soil zone method as well as soldier pile lagging plus internal support method.The localized area reinforcement design and minor design adjustment due to the change of subsurface soil conditions are also introduced in the paper.

关 键 词：基坑工程 软土地区 加固设计 复杂环境 

分 类 号：TU473[建筑科学—结构工程]