Based on a tunnel project in Liaoning Province,a numerical simulation method was used to study the hydration heat and the temperature changes of high-strength lining concrete during the hydration process.Further,the polar variance method was used to systematically analyze the effects of flow rate,inflow temperature,and diameter of cooling water pipe on the hydration heat of high-strength lining concrete in tunnels.The results indicate that the degree of influence of the three factors of cooling water pipes on the hydration heat of high-strength lining concrete in tunnels is as follows:inlet temperature＞diameter＞flow rate.Specific suggestions for temperature regulation include using cooling water pipes with a spacing of 1 m,a flow rate of 1.2 m3/h,an inlet temperature of 20 ℃,and a diameter of 30 mm.These measures help to reduce temperature differences and effectively prevent the occurrence of temperature cracks,thereby improving the safety and durability of high-strength lining concrete structures in tunnels.
关键词
高强衬砌混凝土/水化热/温度调控/应力/数值模拟
Key words
High-strength lining concrete/Heat of hydration/Temperature regulation/Stress/Numerical simulation
维普
万方数据