长短桩结合被动区加固在深厚软土基坑中的应用研究  

APPLICATION STUDY ON LONG-SHORT PILE COMBINED WITH REINFORCEMENT IN PASSIVE ZONE OF DEEP SOFT SOIL EXCAVATION

作　　者：李松 LI Song(Central Southern Geotechnical Design Institute Group Co.,Ltd.,Wuhan 430071,China;Hubei Provincial Engineering Technology Research Center of Environmental Geotechnique,Wuhan 430071,China)

机构地区：[1]中南勘察设计院集团有限公司,武汉430071 [2]湖北省环境岩土工程技术研究中心,武汉430071

出　　处：《低温建筑技术》2024年第7期152-156,共5页Low Temperature Architecture Technology

摘　　要：在深厚软土地区进行基坑支护设计长期以来是基坑工程界的一大难题,往往出现基坑开挖深度不大、桩长设置很长且不能满足规范要求的情况。为解决上述问题,文中在深入分析长短桩结合被动区加固作用机理的基础上,以武汉中体科技体育中心项目为例,详细介绍了此项目所运用的长短桩结合被动区加固支护结构,并使用弹性抗力法对基坑变形和稳定性进行计算分析,得到了短桩结合被动区加固可有效控制基坑位移、长桩控制基坑整体稳定性的结论,基坑监测数据表明此项目长短桩结合被动区加固的运用是成功的。最后,提出了深厚软土地区基坑长短桩结合被动区加固的设计流程,以期为类似工程提供借鉴。The excavation support in deep soft soil area is subjected to low excavation depth even with long piles,which does not meet the code requirements.We analyze the mechanism on long-short pile combined with reinforce⁃ment in passive zone.Taking Chinese Sports Science and Technology Sports Center in Wuhan as the case,we intro⁃duced the long-short piles combined with reinforcement in passive zone support structure in detail.And the calcula⁃tion and analysis of the deformation and stability of the excavation are carried out by using elastic resistance method.The results show that the short pile combined with reinforcement in passive zone effectively controls the displace⁃ment of excavation,and long piles control the overall stability of excavation.The monitoring data of excavation show that the use of long-short pile combined with reinforcement in passive zone is successful.At last,the design flow of long-short pile combined with reinforcement in passive zone of excavation in deep soft soil area is proposed with a view to provide reference for similar projects.

关 键 词：基坑支护 长短桩 被动区加固 深厚软土区 

分 类 号：TU473[建筑科学—结构工程]