特殊条件下的真空预压密封技术  

Sealing Technique of Vacuum Preloading Under Special Condition

作　　者：蔡南树[1] 柯朝晖 董志良[3] 张功新 莫海鸿[4] 张峰[3] 

机构地区：[1]河海大学交通学院,江苏南京210098 [2]广州港集团南沙工程办公室,广东广州510700 [3]广州四航工程技术研究院,广东广州510230 [4]华南理工大学建筑学院,广东广州510640

出　　处：《水运工程》2005年第9期118-121,共4页Port & Waterway Engineering

基　　金：广东省交通厅资助项目(2002-05);广州四航工程技术研究院资助项目(岩S2004004)

摘　　要：结合广州港南沙港区二期工程软基处理工程实例,针对在局部有抛石地段的软土采取真空预压方法加固时传统的挖密封沟和施打淤泥搅拌墙技术存在相当大困难的情况,提出了在有抛石地段采取高压旋喷桩密封技术。实测结果表明,采取该技术密封效果良好,真空度能达到设计要求。与堆载方案相比,采取本技术经济效益良好,具有较好的推广价值。Combined with soft soil consolidation engineering of Guangzhou Nansha Port Area Phase Ⅱ Porject, the sealing technique by using high pressure jet-grouted pile instead of trenching and mixing slurry wall in soft soil with rubble-mound foundation consolidated by vacuum preloading is presented, because the traditional sealing trench excavation or mixing slurry wall is very difficult under that condition. The test results show that the sealing effect is satisfactory and the vacuity can meet the design requirements. Comparing with the method of preloading by material, this technique results in better economic bemefit, and thus has a great value of popularization.

关 键 词：真空预压 淤泥搅拌墙 高压旋喷桩 堆载预压 抛石基础 

分 类 号：TU472.33[建筑科学—结构工程]