岩土力学2012，Vol.33Issue(10)：3151-3155,3170,6.
不同降雨模式下山谷型垃圾填埋场水分运移及其稳定性研究
Investigations of water transport in valley-type MSW landfills and their stabilities subjected to various rainfall patterns
摘要
Abstract
It is shown that the water tables of leachate in many early valley-type MSW landfills in Chinese Southern Region are very high by the operating experiments in last ten years. It is shown that the high water table of leachate by rainwater infiltration is a main factor induced MSW landfill landslide by many literatures. So, it is very important to investigate the water transport responses and the stability of valley-type MSW landfills under heavy rainfall. Firstly, based on the soil-water characteristic curve of shallow, middle and deep layer MSW in Qizhishan landfill and Brooks-Corey equations, the permeability function of MSW landfills is given by nonlinear curve fitting. Secondly, numerical analyses are conducted to investigate water transport in Qizhishan valley-type MSW landfill subjected to rainfalls with four different patterns, i. e. delayed, central, advanced and uniform rainstorms. At last, the stability of Qizhishan landfill has been studied by limit equilibrium method. The computed results show that rainfall pattern has a significant influence on water transport in valley-type landfill and its stability, and the delayed rainfall is found to be the most critical one because it results in the highest pore-water pressure in the landfill and the smallest safety factor of landfill. Numerical results show that the safety factor of landfill reaches 1.016 after 746 mm rainfall with duration of 7 days, and the possibility of landside in Qizhishan landfill is very great.关键词
七子山填埋场/降雨模式/降雨入渗/饱和-非饱和渗流/水分运移/稳定性分析Key words
Qizhishan landfill/ rainfall patterns/ rainfall infiltration/ saturated-unsaturated seepage/ water transport/ stability analysis分类
建筑与水利引用本文复制引用
邱战洪,何春木,朱兵见,陈合龙..不同降雨模式下山谷型垃圾填埋场水分运移及其稳定性研究[J].岩土力学,2012,33(10):3151-3155,3170,6.基金项目
国家自然科学基金(No.51108293) （No.51108293）
浙江省自然科学基金(No.Y108792). （No.Y108792）
