模拟管袋坝接缝管路的糙率率定试验方法

Experimental Method for Roughness Calibration of Simulating Seams Pipeline Between Tubes of Geotube Dam

为了解决模拟管袋坝袋间接缝管路的糙率边界条件模拟和观察试验的矛盾,自行设计一套糙率率定的试验装置,主要包括供水设备、模拟管路和数据采集设备.针对该试验装置提出了相应的试验原理和试验方法,并验证该试验装置及试验方法是可行的.在此基础上进行了纱网糙率率定试验,选出适当糙率的纱网完成对管路边界条件的模拟,同时满足观察管路中砂体的运移状态的需要.

To solve the contradiction between roughness boundary condition simulation of the seams pipeline between tubes of geotube dam and experimental observation, a set of experimental study apparatus is de- signed. The apparatus mainly consists of water supply equipment, simulated pipeline and information collec- ting device. The related experimental principle and method are proposed; and then the experimental equip- ment and method＇s validity is also proved. A series of model experiment on the roughness coefficient of gauze are carried out; and the gauze having the proper roughness is selected out to simulate the boundary condition of the seams pipeline, simultaneously observing the movement status of the sand body in the pipeline is real- ized.