TY - JOUR
TI - Parameter optimization of anti-crystallization flocking drainage pipe based on macro force and displacement characteristics of villus
AU - Liu Shiyang
AU - Zhang Xuefu
AU - Gao Feng
AU - Li Yun Yu
AU - Al Dulaimi Saeed Hameed Kurdi
JN - Thermal Science
PY - 2021
VL - 25
IS - 6
SP - 4127
EP - 4135
PT - Article
AB - The crystal blockage of tunnel drainage pipe seriously affects the smoothness  of the whole drainage system. Therefore, it is very important to effectively  prevent crystal plugging in tunnel drainage system to ensure the safety and  stability of lining structure during tunnel operation. Based on the macro  force and displacement characteristics of villus, the optimization of  villus diameter and villus length of flocked drainage pipe at low flow rate  was studied by numerical simulation. The results show that: there is a  difference of 1-2 orders of magnitude between the 3-D displacements of the  bottom villus and one order of magnitude between the 3-D displacements of  the side villus of the flocked drainage pipe; with the increase of villus  length, the 3-D displacement of villus increased parabola and with the  increase of villus diameter, the 3-D displacement of villus decreased  gradually; the results show that the first and third principal stresses of  the bottom villus increase linearly with the increase of villus length,  while the first and third principal stresses of the side villus increase  parabola with the increase of villus length; when the flow rate is 2 cm/s,  the diameter of villus is 0.6 mm and the length of villus is 20 mm. Flocking drainage pipe anti crystal plugging technology fills the blank of  tunnel drainage pipe anti crystal plugging research. This technology can  reduce the maintenance cost of tunnel drainage system during operation, and  ensure the safe and normal operation of the tunnel.