海南软土地区深基坑排桩支护的变形特性  

Research on deformation characteristics of deep excavations Research on deformation characteristics of deep excavations row pile support in soft soil area of Hainan

作　　者：叶俊杰 韩建刚[1] YE Junjie;HAN Jiangang(Civil Engineering College,Hainan University,Haikou 570228,China)

机构地区：[1]海南大学土木建筑工程学院,海南海口570228

出　　处：《海南大学学报(自然科学版)》2024年第4期439-446,共8页Natural Science of Hainan University

基　　金：海南省自然科学基金高层次人才项目(2019RC079,623RC451)。

摘　　要：基于海南软土地区深基坑工程监测案例,从统计角度研究了海南软土地区排桩支护深基坑变形和地表沉降的特点,并对其影响因素进行分析.结果表明:海南软土地区围护墙在坑底抗隆起安全系数较大时,无量纲最大侧移与支撑系统刚度的关系不大;海南软土基坑围护墙的最大侧移位置发生在开挖面以上,集中在1/2开挖深度与开挖面之间;围护墙最大侧移介于0.08%~0.28%的开挖深度,平均值为开挖深度的0.18%;墙后最大地表沉降介于0.04%~0.26%的开挖深度之间,平均值为0.10%的开挖深度,经统计给出了墙后地表沉降的包络线.与其他发达地区统计数据相比较,所得结论可为海南软土地区深基坑的设计与施工提供借鉴.Based on monitoring case histories of soft soil deep excavations row pile support in Hainan,the char-acteristics of deformation and surface settlement of the retaining wall of soft soil deep excavations in Hainan were studied from a statistical perspective.The results shows that the normalized maximum lateral displacement of the retaining wall in Haina soft soil area is limited when the Factor of safety is large.The location of the maximum lateral deflection of wall occurs above the excavation surface,concentrated between 1/2 of the excavation depth and the excavation surface.The maximum lateral deflection of the retaining wall ranges from 0.08%to 0.28%of the excavation depth,with a mean value of 0.18%of the excavation depth.The maximum ground surface set-tlement generally range from 0.04%to 0.26%of the excavation depth,with a mean value of 0.10%of the ex-cavation depth.The upper bounds of the ground settlement profiles has been proposed for the case histories in Hainan through statistics.Compared with statistical data from other regions,the conclusions obtained can pro-vide reference for the design and construction of soft soil deep excavations in Hainan.

关 键 词：海南地区 深基坑 变形 软土 

分 类 号：TU473[建筑科学—结构工程]