浅水位斜坡道明槽冻结法施工技术研究与应用  

Freezing open channel construction of shallow water slope

作　　者：牛鹏翔 刘晓亭 孟中朝 刘智育 陈君 NIU Peng-xiang;LIU Xiao-ting;MENG Zhong-chao;LIU Zhi-yu;CHEN Jun(China Coal First Construction Co.,Ltd.,Handan 056003,China)

机构地区：[1]中煤第一建设有限公司,河北邯郸056003

出　　处：《煤炭工程》2020年第7期10-15,共6页Coal Engineering

摘　　要：为了保证静水位浅、地下水流速高地层中斜坡道明槽工程的安全高效施工,基于二维有限元模型计算和受力分析,提出了U型冻结壁与钢板桩联合支护的综合防护技术,对开挖段采用冻结法治水,对冻结深基坑设计钢板桩内支撑,并通过对钢板桩的拉锚、横撑以及对冻结壁土钉墙加固、保温等措施,结果表明该技术避免了地下水对施工的影响,保证了开挖后两侧冻结壁的稳定性,有效预防了冻结壁强度不足造成倾覆的风险。In order to ensure the safe and efficient construction of the open channel project in the slope with shallow static water level and high groundwater flow rate,based on the calculation and stress analysis of the two-dimensional finite element model,the comprehensive protection technology of U-shaped frozen wall and steel-sheet-pile joint support is proposed.Freezing method is used to control water,in the excavation section and the steel sheet pile internal support is designed for the frozen deep foundation pit,and the steel sheet pile is anchored,transversely braced,and the frozen wall soil nailing wall reinforcement and heat insulation measures are taken.The impact of the construction ensures the stability of the frozen walls on both sides after excavation,and effectively prevents the risk of overturning caused by insufficient strength of frozen wall.

关 键 词：浅水位 斜坡道明槽 冻结法 钢板桩联合支护 

分 类 号：TD265.3[矿业工程—矿井建设]