型钢倾斜桩在软土深基坑工程中的应用研究  

Research on the application of steel inclined piles in soft soil deep foundation pit engineering

作　　者：俞伟 YU Wei(Fujian Academy of Building Research Co.,Ltd.,Fujian Provincial Key Laboratory of Green Building Technology,Fuzhou 350108)

机构地区：[1]福建省建筑科学研究院有限责任公司,福建省绿色建筑技术重点实验室,福建福州350108

出　　处：《福建建筑》2024年第8期63-69,共7页Fujian Architecture & Construction

基　　金：福建省建设科技项目(2022-K-143,2022-K-146)。

摘　　要：为研究型钢倾斜桩在软土深基坑工程中的适用性,基于福州某软土深基坑工程,依据其工程地质条件、水文地质条件以及周边环境条件,提出采用型钢倾斜桩的支护方案,并采用有限元分析方法及监测数据验证方式,对软土深基坑的土体变形、桩身内力及变形进行研究。结果表明:采用型钢倾斜桩组合支护结构,可显著减小支护桩侧移和内力,且型钢倾斜桩相较于混凝土桩成本更低;针对局部土质较差的情况,可采用坑内被动区加固的方式提高斜桩的侧阻力,以满足斜桩的承载力要求;基坑支护结构以及周边环境变形监测数据,验证了型钢倾斜桩在软土深基坑工程中的适用性,可为类似软土深基坑工程提供参考。To investigate the applicability of steel inclined piles in soft soil deep foundation pit engineering,based on a soft soil deep foundation pit project in Fuzhou,a support scheme using steel inclined piles is proposed based on its engineering geological conditions,hydrogeological conditions,and surrounding environmental conditions.Finite element analysis method and monitoring data verification are used to study the soil deformation,pile internal force,and deformation of soft soil deep foundation pit.The results show that:the use of steel inclined pile composite support structure can significantly reduce the lateral displacement and internal force of the support pile,and the cost of steel inclined piles is lower compared to concrete piles;For situations where the local soil quality is poor,the passive zone reinforcement in the pit can be used to increase the lateral resistance of the inclined pile,in order to meet the bearing capacity requirements of the inclined pile;The deformation monitoring data of the foundation pit support structure and surrounding environment have verified the applicability of steel inclined piles in soft soil deep foundation pit engineering,which can provide reference for similar soft soil deep foundation pit engineering.

关 键 词：型钢 倾斜桩 基坑支护 数值模拟 内力变形分析 

分 类 号：TU4[建筑科学—土工工程]