Mechanical properties of pipeline erosion during#br#
slurry transportation of slurry shield
Huang Zimu1,2 Li Xinggao1,3 Yang Yi1,3
1. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China;
2. Guangzhou Engineering Construction Headquarters of China Railway Guangzhou Group Co. , Ltd. , Guangzhou 510440, China;
3. Key Laboratory of Urban Underground Engineering of the Ministry of Education, Beijing Jiaotong University, Beijing 100044, China
Abstract：In order to explore the erosion law to elbow when shield slurry conveying muck, based on CFD method, the erosion process of slurry containing coarse muck (≥20 mm) conveying in the elbow was simulated by FLUENT software, and the influence rule of 3 factors such as slurry velocity, slurry viscosity and muck volume fraction on the erosion of the elbow was analyzed by single factor method. The slurry erosion characteristics was investigated through laboratory test, and the correctness of simulation was verified. The results show that the slurry velocity has significant influence on the erosion rate and erosion position of the elbow, and it is positively correlated with the erosion rate; the muck volume fraction mainly affects the erosion rate; the slurry viscosity has little effect on the slurry condition of the elbow；main wear areas are concentrated in the elbow vicinity of 30°.
