岩土工程学报2026，Vol.48Issue(z2)：12-17,6.DOI:10.11779/CJGE2026S20026
前撑式基坑支护结构工作性状和设计方法研究
Mechanical behavior and design methodology of retaining structures with raked struts for excavations
摘要
Abstract
Retaining walls with raked struts,which rely on the synergistic interaction between inclined rigid composite piles and retaining walls,offer notable advantages such as ease of construction,resource,conservation,and reduced construction costs.As a result,this support system has been increasingly adopted in large-area excavations.However,existing studies on the mechanical behavior and influencing factors of retaining walls with raked struts remain limited.In particular,a rational calculation method for the equivalent horizontal stiffness of raked struts is still absent,which restricts their application under complex environmental and geological conditions.In this study,finite element simulations are conducted to investigate the behavior of retaining walls supported by three typical systems:steel pipe-cement soil composite pile raked props,steel pipe pile raked props,and conventional horizontal steel pipe struts.The results indicate that,compared with traditional horizontal supports,the use of raked struts leads to a significant reduction in the bending moment of the retaining wall,a noticeable increase in the displacement at the wall top,but a slight influence to the maximum deflection.Based on extensive parametric analyses,a fitting formula for the equivalent horizontal stiffness of raked props is proposed.Furthermore,a simplified analytical method for predicting internal forces and deformations of retaining walls with raked struts is developed and validated through an engineering case study.关键词
前撑式基坑支护结构/工作性状/等效水平刚度/设计计算方法Key words
retaining structures with raked struts/mechanical behavior/equivalent horizontal stiffness/design methodology分类
建筑与水利引用本文复制引用
俞建霖,杨垚杰,朱成伟,吴佳硕,沈韵,杨学林,刘玉涛..前撑式基坑支护结构工作性状和设计方法研究[J].岩土工程学报,2026,48(z2):12-17,6.基金项目
国家自然科学基金项目(52408402) （52408402）
浙江省"尖兵领雁"科技计划项目(2025C02210) （2025C02210）
