南京林业大学学报（自然科学版）2017，Vol.41Issue(4)：167-172,6.DOI:10.3969/j.issn.1000-2006.201612001
基于实测解冻温度的联络通道冻结法融沉注浆优化研究
The connecting passage freezing method thaw settlement grouting optimization study in accordance with measured thawing temperature
摘要
Abstract
[Objective] In the construction of freezing method,grasping the development rule of thawing temperature of the subway interconnecting road is the essential for tracking grouting and controlling the thawing settlement after the construction.[Method] With the background of freezing method project of the soft oil subway interconnecting road,the changing rule of the melting temperature field and deep soil temperature etc.are measured;to control the thawing settlement more efficiently,the opportunity and order of tracking the grouting and the grouting process and materials are optimized.[Result] In the 20-day thawing of the connected aisle,the temperature of some soils began to reach near 0 ℃,and the frozen earth entered the phase transition stage;the deeper the embedded depth,the longer the time of the soil phase change.The soft soil thaw settlement mainly appears two months before thawing and the fully thawing of the side wall and the top takes four months,then,3-4 months is the least time to track grouting.[Conclusion] During the process of controlling the thaw settlement,the grouting should be carried out in the order of the bottom → the top → the side wall.At the same time,the double control standards should be implemented according to the neasured temperature and the land subsidence amount.Reasonable arrangement of construction sequence and grouting parameters,as well as the reinforcement of the monitoring,can further reduce the scope of the soil around the connected aisle affected by the thaw settlement and reduce the impact of the top of the connected aisle by the thaw settlement.关键词
联络通道/冻结法/解冻温度场/地面沉降/跟踪注浆/城市轨道交通Key words
connecting passage/freezing method/thaw temperature field/ground subsidence/tracing compensation grouting/urban rail transit分类
交通工程引用本文复制引用
吴繁,杨平,万朝栋,张尚贵,何文龙..基于实测解冻温度的联络通道冻结法融沉注浆优化研究[J].南京林业大学学报（自然科学版）,2017,41(4):167-172,6.基金项目
国家自然科学基金项目(51478226) （51478226）
住房和城乡建设部科学技术项目(2014-k3-029) （2014-k3-029）
