超软淤泥地基处理中真空度传递特性研究  

Transfer properties of vacuum degree in treatment of super-soft muck foundation

作　　者：朱群峰[1] 高长胜[1] 杨守华[1] 张凌[1] 李东兵[1] 汪璋淳[1] 

机构地区：[1]南京水利科学研究院岩土工程研究所,江苏南京210024

出　　处：《岩土工程学报》2010年第9期1429-1433,共5页Chinese Journal of Geotechnical Engineering

基　　金：江苏省自然科学基金项目(BK2009052);南京水利科学研究院中央级公益性科研院所基本科研业务费专项资金重点项目(Y300901)

摘　　要：为探索低位真空预压用淤泥替代密封膜的密封性及真空度在地基中传递规律,本文在超软淤泥地基处理工程中埋设原观仪器进行现场试验研究。结果表明:用淤泥替代密封膜进行密封其密封效果能满足要求;排水板和淤泥中的真空度沿深度衰减,排水板中真空度衰减速度与排水板周围土质存在密切关系;淤泥中真空度明显小于排水板中真空度,且存在一个启动过程。真空度在新吹填淤泥中的传递损失明显大于天然淤泥。To discover the sealing of low vacuum preloading by using muck instead of sealed films and the transfer rules of vacuum degree in muck foundation, monitoring instruments are embedded for treatment of super-soft muck foundation project, and field tests are performed. The results show that the requirements of sealing are satisfied by using muck instead of sealed films. The vacuum degrees in drainage and muck both decrease with the depth, and the decrease speed of the vacuum degree in the drainage has a close relation with the properties of the muck around it. The vacuum degree in the muck is obviously less than that in the drainage, and there exists a startup process. The loss of the vacuum degree transfer in new hydraulic fill muck is obviously larger than that in the muck.

关 键 词：低位真空预压 吹填淤泥 排水板中真空度 泥中真空度 

分 类 号：TU471[建筑科学—结构工程]