Support technology of high pressure hydraulic shotcrete and its application in tunnel engineering

[摘要] Shotcrete technology is one of the necessary part of support system in tunnel engineering, and the support effect of shotcrete is getting more and more attention. We improve the materials and technologies and propose a new shotcrete supporting method, high pressure hydraulic shotcrete. The high pressure hydraulic parameters of C20, C25 and C30 concrete is studied. Several key factors and problems of the parameters are expounded. The engineering application shows that, compared with ordinary shotcrete technology, high pressure hydraulic shotcrete can effectively reduce the shotcrete resilience and the content of dust, and the later strength loss of shotcrete is less than 10%, which has a good popularization and application value.

[发布机构] Research Institute of Highway Ministry of Transport, China^1;Guangdong Province Traffic Chaozhang Expressway Management Center, China^2

[效力级别] 无线电电子学 [学科分类] 材料科学（综合）

[关键词] Engineering applications;Hydraulic parameters;ITS applications;Materials and technologies;Support effects;Support systems;Support technology;Tunnel engineering