含盐地层冻土帷幕安全状态判断方法的工程应用  

Safety State Assessment Method of Artificially Frozen Soil Curtain in Saline Strata and Its Application

作　　者：张军[1,2] 李慕涵[3] 胡向东[1,2] 

机构地区：[1]同济大学地下建筑与工程系,上海200092 [2]同济大学岩土及地下工程教育部重点实验室,上海200092 [3]上海隧道工程股份有限公司,上海200082

出　　处：《地下空间与工程学报》2010年第1期189-192,共4页Chinese Journal of Underground Space and Engineering

基　　金：国家自然科学基金资助项目(50578120);国家高技术研究发展计划(863)项目(2006AA11Z118)

摘　　要：冻结法施工广泛运用隧道联络通道,而在含盐较高的土层中运用冻结法施工与普通土层则有所不同。本文依托上海长江隧道2#联络通道冻结工程,考虑到含盐土层的影响,对双排管冻结公式进行了修正,得出在高含盐地区的冻土帷幕温度场的形成规律,并计算出冻土帷幕厚度及平均温度等指标,进而指导并确保在这种复杂工程中冻结施工的安全。Artificial ground freezing is widely used in cross passage projects, and its application has some differences in saline clay. Accroding to the 2nd cross passage of the Shanghai Yangtze River Tunnel, the influence of high salinity on the double - pipe freezing formula has been considered for the correction of the formula. According to this modified formula, it gives the law of temperature field formation and the thickness of the frozen zone, the average temperature of the frozen zone are calculated, it can serve as valuable guidance to ensure the safety of artificial ground freezing projects.

关 键 词：人工冻结法 冻土帷幕 含盐地层 盾构隧道 联络通道 

分 类 号：TU472[建筑科学—结构工程]