明挖隧道高强度薄壁侧墙混凝土裂缝防控技术  

Crack Prevention and Control Technology of High Strength Thin Wall Concrete in Open-Cut Tunnel

作　　者：王超峰 禹化伟 WANG Chao-feng;YU Hua-wei(China Railway Tunnel Engineering Group Co,Ltd,Guangzhou 511458,China;No.3 Branch of China Railway Tunnel Bureau,Shenzhen 515073,China)

机构地区：[1]中铁隧道局集团有限公司,广州511458 [2]中铁隧道局三处有限公司,深圳515073

出　　处：《建材世界》2022年第2期53-57,共5页The World of Building Materials

摘　　要：针对明挖隧道高强度薄壁侧墙裂缝,结合工程实例进行了原因分析和各种措施改进,从优选原材料、大量掺入矿物掺合料、采用保温模板、延长脱模时间和养护剂等方法着手,在不采用循环水冷却措施情况下,大大减少了工程裂缝的数量和宽度,产生了良好的经济和社会效益。Aimed at the cracks at high-strength thin-walled wall of open-cut tunnel,combined with engineering examples,this paper analyzed the causes and various improved measures.Starting from the methods of optimized raw materials,added a large number of mineral admixtures,adopted thermal insulation formwork,extended demanding time and used concrete curing agent etc,the number and width of engineering cracks were greatly reduced without used circulating water cool method.It has produced good economic and social benefits.

关 键 词：薄壁混凝土 裂缝 温度控制 保温模板 混凝土养护剂 

分 类 号：TU7[建筑科学—建筑技术科学]