长江科学院院报2024，Vol.41Issue(6)：98-105,113,9.DOI:10.11988/ckyyb.20230171
软土地区基坑前排倾斜双排桩支护现场试验及工作机理
Field Experiment and Working Mechanism of Foundation Pit Excavation Retained by Front-row Inclined Double Row Piles in Soft Soil Area
摘要
Abstract
Inclined pile support has notably extended the applicable depth of unsupported retaining structures,boas-ting advantages such as cost-effectiveness,ease of construction,environmental friendliness,and precise deforma-tion control.However,current researches focus on single row inclined piles,while research on the testing,theory,and application of inclined double-row pile support remains limited.We conducted field experiments to assess exca-vation supported by double-row piles with the front row inclined.Additionally,employing the finite element meth-od,we investigated the underlying working mechanisms from three aspects:the front-row inclined double-row piles,the connecting beam on top of piles,and the soil interaction among piles.We further examined the impact of pile length and row spacing on the deformation characteristics of inclined double-row piles.Our findings indicate a marked enhancement in the supportive capabilities of front-row inclined double-row pile compared to traditional ver-tical double-row piles.The front-row inclined double-row piles primarily serve as diagonal bracing,while the beams connect the piles and the crown beam into a spatially rigid frame.Soil between the piles enhances pile-soil friction,effectively mitigating deformation in inclined double-row piles.关键词
基坑/前排倾斜双排桩/现场试验/工作机理/软土地区Key words
foundation pit excavation/front-row inclined double row piles/field experiment/working mechanism/soft soil area分类
建筑与水利引用本文复制引用
郑刚,王玉萍,程雪松,余地华,黄晓程,李昕昊..软土地区基坑前排倾斜双排桩支护现场试验及工作机理[J].长江科学院院报,2024,41(6):98-105,113,9.基金项目
国家自然科学基金项目(52178343) （52178343）
