隧道初期支护喷射混凝土强度质量控制

Quality Control of Reinforced Concrete in Early Tunnel

喷射混凝土强度质量控制,通过参与渝黔铁路土建5标羊角隧道横洞喷射混凝土实体取芯强度对比试验,从原材料、配合比、喷射工艺等几个方面加强控制,各级检查喷射混凝土强度始终受控,没有出现取芯检测强度不足和返工、停工现象,现将对喷射混凝土施工强度质量控制进行总结与经验交流。

The quality control of jet concrete strength,through participating in the comparison test of the strength of the jet concrete core in the five-standard Yangjiao tunnel of the Chongqing Railway,has been strengthened from the raw materials,the ratio of cooperation,and the injection process,and the strength of the jet concrete has always been checked at all levels. controlled. There is no lack of core testing strength,rework,and shutdown. We will now summarize and exchange experience on the quality control of the construction strength of the concrete.