变截面筒桩承载力特性数值模拟研究与设计  

Structural design and numerical study on bearing capacity of variable cross-section tubular pile

作　　者：王凯 郑昂 张钰赫 姚占勇 姚凯 WANG Kai;ZHENG Ang;ZHANG Yu-he;YAO Zhan-yong;YAO Kai(School of Qilu Transportation,Shandong University,Jinan 250002,Shandong,China)

机构地区：[1]山东大学齐鲁交通学院,山东济南250002

出　　处：《地基处理》2024年第S01期31-38,共8页Journal of Ground Improvement

摘　　要：本文基于相关理论分析、数值模拟、工程现场试验等研究方法,根据黄泛区地层特点,结合传统搅拌桩技术对桩体结构设计进行分析和优化,重点开展变截面筒桩数值模拟等研究工作,提出变截面筒桩的设计方法和工程方案,并开展工程试验评价变截面复合浆喷桩成桩质量和地基加固效果,分析变截面筒桩承载特性,明确变截面筒桩受力性状,为工程应用提供可靠的理论指导。同时针对变截面筒桩的不同设计方案进行优化,分析不同方案下筒桩各部位的性能表现,明确桩体受力性状,为工程实际桩基布置提供参考。基于结构分析和工程试验,优化变截面水泥土浆喷复合桩结构一体化设计方案,将有效改善黄泛区高速公路地基加固工程质量、降低地基加固成本,具有显著的经济效益和社会效益。Based on relevant theoretical analysis,numerical simulation,engineering field test and other research methods,this paper analyzes and optimizes the design of pile structure based on traditional mixing pile technology according to the stratigraphic characteristics of the yellow floodplain area.It focuses on numerical simulation of variable cross-section tubular piles,puts forward the design method of variable cross-section tubular piles and engineering scheme,and carries out engineering test to evaluate the pile quality and foundation reinforcement effects.The study analyzes the load-bearing characteristics of these piles,clarifying their stress conditions to provide reliable theoretical guidance for engineering applications.Additionally,different design schemes for variable cross-section tubular piles are analyzed and optimized to assess the performance of various sections and understand the stress conditions of the piles,providing practical guidance for pile foundation layout in engineering projects.Through structural analysis and engineering tests,an integrated design scheme for variable cross-section cement-soil slurry spraying composite piles is optimized.The implementation of this technology is expected to significantly improve the quality of highway foundation reinforcement in the yellow floodplain area and reduce reinforcement costs,yielding notable social and economic benefits.

关 键 词：搅拌桩 变截面 数值模拟 筒桩 单桩承载力 

分 类 号：TU473[建筑科学—结构工程]