地下综合管廊基坑围护结构及地表变形分析  

Analysis of Supporting Structure and Surface Deformation in the Underground Integrated Utility Culvert Excavations

作　　者：王世禄 WANG Shilu(Changda Municipal Engineering(Guangdong)Co.Ltd.,Zhongshan 528400)

机构地区：[1]长大市政工程(广东)有限公司,广东中山528400

出　　处：《土工基础》2023年第3期391-394,共4页Soil Engineering and Foundation

摘　　要：中山某综合管廊结构,拟采用明挖法施工,围护结构采用SMW工法桩。采用现场监测数据和数值模拟方法分析工法桩的插入比、桩的直径、内撑横间距、内支撑竖向间距四个因素对基坑变形的影响。结论如下:①分析推导得到关于SMW工法桩最大水平位移和地表最大沉降计算公式;②支护结构水平位移和地表最大沉降的最显著影响因素为工法桩的直径,其他影响因素依次为工法桩的插入比、支撑横向间距、支撑竖向间距。SMW工法桩的水平位移和地表最大沉降,与SMW工法桩的插入比和直径成反比例关系,与支撑横向和竖向间距的成正比例关系。A comprehensive underground utility culvert structure in Zhongshan is to be constructed with open-cut and cover excavation method and the soil mixing wall(SMW)constructed columns is used for the supporting structure.In this paper,the field monitoring data and numerical simulation analysis methods are used to analyze the excavation deformation caused by following four factors:column insertion ratio,column diameter,transverse spacing of internal bracing and vertical spacing of internal bracing.The conclusions can be obtained:(1)The formulas for predicting the maximum horizontal displacement and maximum surface settlement of the SMW constructed columns are derived through analysis;(2)The diameter the SWM column is the most significant factor affecting the horizontal displacement and maximum surface settlement of the supporting structure,and the other influencing factors are column insertion ratio,transverse spacing of supports and vertical spacing of supports in order.The horizontal displacement and maximum surface settlement of SMW column are inversely proportional to the insertion ratio and diameter of SMW columns,and directly proportional to the horizontal and vertical spacing of support.

关 键 词：综合管廊 SMW工法桩 明挖法 数值模拟 

分 类 号：TU473[建筑科学—结构工程]