真空预压引发周边土体变形及防治研究  

Deformation of surrounding environment caused by vacuum precompression and its prevention

作　　者：缪丹 何楚韶 Miao Dan;He Chushao(Guangzhou Guangjian Construction Engineering Testing Center Co.,Ltd.,Guangzhou 510080,Guangdong,China;Guangdong Engineering Technology Research Cencer of Building Health Monitoring and Security Early Warning,Guangzhou 510080,Guangdong,China)

机构地区：[1]广州广检建设工程检测中心有限公司,广东广州510080 [2]广东省建筑物健康监测与安全预警工程技术研究中心,广东广州510080

出　　处：《岩土工程技术》2025年第2期264-270,共7页Geotechnical Engineering Technique

摘　　要：真空预压是软基处理常用的方法。为研究真空预压对周边土体的影响及相应的变形防治技术,开展了真空预压加固地基现场试验,通过分析监测数据揭示周边环境变形规律,评价防治效果。研究结果表明:(1)真空预压会引发周边场地水位和孔隙水压力下降,进而产生侧向位移和沉降;(2)真空预压对周边环境的影响范围与土质条件有关;(3)本项目采用砂桩+水泥土搅拌桩防治技术,加固区周边土体水平位移及沉降均减少约40%。Vacuum preloading is a commonly used method for soft soil foundation treatment.To study the influence of vacu-um preloading on surrounding soil and corresponding deformation prevention technology,a field test of vacuum preloading reinforced foundation was conducted.Through analysis of monitoring data,the deformation patterns of the surrounding environment were re-vealed,and the effectiveness of prevention measures was evaluated.Research results show that:(1)vacuum preloading caused a de-crease in groundwater levels and pore water pressure in the surrounding area,leading to lateral displacement and settlement;(2)the im-pact range of vacuum preloading on the surrounding environment was found to be related to soil conditions;(3)in this project,a com-bination of sand piles and cement-soil mixing piles was adopted as a deformation prevention technology,effectively reducing both hori-zontal displacement and settlement around the reinforced area by approximately 40%.

关 键 词：真空预压 地基处理 变形控制 孔隙水压 软基监测 

分 类 号：TU472[建筑科学—结构工程]