摘要
为了探究暗管排水“有效半径”理论对合成外包材料的适用性,开展了不同类型与厚度外包材料条件下的暗管排水野外实验,考虑了砂砾石、热黏长丝无纺布、纺黏长丝无纺布等3种材料,对两种合成材料又考虑了厚度的影响,共设置五组试验,观测了其排水过程,并与排水理论公式、融合“有效半径”理论的地下水运动数值模拟所得到的排水过程进行了对比分析,结果表明:“有效半径”理论将外包材料对暗管排水的影响通过材料渗透系数Ke和铺设厚度de改变暗管有效半径来实现,这导致厚度越大排水量越大,与野外试验结果和排水理论公式计算结果相反。传统的外包材料排水“有效半径”理论不适用于合成外包材料,有必要对该理论进行修正。
In order to explore the applicability of“Effective Radius”theory to the drain pipe wrapped in synthetic envelope,this paper con⁃ducts field pipe drainage experiments,which consider the types and the thickness of the envelope.The drainage processes are monitored and compared with those computed by the drainage theory formula and the numerical simulation of groundwater movement combined with the the⁃ory of“effective radius”.It is found that the effective radius of drainage is mainly influenced by the permeability coefficient and the thickness of envelope,which results in a bigger radius with a higher thickness.This is contrary to the field test results and the calculation results of the drainage theory formula.Therefore the traditional theory of effective radius of outsourcing material drainage is not suitable for synthetic out⁃sourcing materials.It is necessary to revise the theory for better estimating the discharge of pipe drainage.
作者
冯梦珂
伍靖伟
郭宸耀
吴哲
杨皓瑜
李航
FENG Meng-ke;WU Jing-wei;GUO Chen-yao;WU Zhe;YANG Hao-yu;LI Hang(State Key Laboratory of Water Resource and Hydropower Engineering Science,Wuhan University,Wuhan 430072,Hubei Province,China)
出处
《中国农村水利水电》
北大核心
2021年第9期141-146,共6页
China Rural Water and Hydropower
基金
国家自然科学基金项目(51790532)。
关键词
暗管
合成外包材料
有效半径
排水效果
pipe drain
synthetic envelope
effective radius
drainage efficiency
