Standard for Design of Early High-strength Shotcrete for Railway Tunnels and Application Research
(1. Science and Technology Development Department of China South-to-North Water Diversion Corporation Limited, Beijing 100097;2. School of Qilu Transportation Shandong University, Jinan 250216; 3. China Railway Engineering Consulting Group Co., Ltd.,Beijing 100044; 4. Technical Standard Division of China Railway Economic and Planning Research Institute, Beijing 100038)
Abstract：
Early high strength shotcrete is characterized by rapidly forming tensile and shear strength during con? struction, which can improve the stability of surrounding rock and ensure safe and efficient operation. It has been widely used in foreign engineering practices, and relevant systematic technical standards have been formed. Although the early strength of shotcrete received attention relatively late in China, at present, it has been gradually popularized and applied in domestic building, highway, railway and other industries. More emphasis has been paid on the strength requirements within 24 hours in the railway industry. In recent years, field tests and applications have shown that the early strength of shotcrete can meet relevant requirements. Moreover, although the cost of early high-strength shotcrete is slightly higher than that of ordinary shotcrete, it has significant advantages over the ordinary shotcrete when taking into consideration such factors as material loss, work efficiency, quality and safety.
LIU Zhe1,
2 JIANG Yanhong3 YANG Yang4
.Standard for Design of Early High-strength Shotcrete for Railway Tunnels and Application Research[J] MODERN TUNNELLING TECHNOLOGY, 2022,V59(6): 232-238
2022, Vol. 59 