CAJ | 학술논문

山谷型垃圾填埋场若发生表面防渗层失效或者排水棱体未能有效排水，降雨条件下雨水直接进入填埋场未能有效排除，导致填埋场水位上升，孔压增大情况，过高的渗滤液水位极易引发填埋场失稳破坏。针对西南某垃圾填埋场垃圾组分情况，利用非饱和渗透试验装置测定孔隙比为3.0、2.5和2.0的垃圾土土水特征曲线。利用FLAC-3D软件进行饱和非饱和非恒定渗流二维分析了该垃圾填埋场在不同降雨条件下的地下水位分布和变化特性。研究成果表明：垃圾土因成分复杂、孔隙大等特点，其土水特征曲线饱和体积含水量较高，随着吸力增加，曲线存在陡降段，这与垃圾土中含有有机成分有关；山谷型填埋场在遭遇暴雨和久雨工况下，都会引起填埋场内部水位快速上升，排水棱体严重淤堵时，渗滤液水位还将从垃圾坝溢出，在降雨总量一致条件下，连续久雨比短时暴雨对填埋场稳定性更为不利。
산곡형랄급전매장약발생표면방삼층실효혹자배수릉체미능유효배수，강우조건하우수직접진입전매장미능유효배제，도치전매장수위상승，공압증대정황，과고적삼려액수위겁역인발전매장실은파배。침대서남모랄급전매장랄급조분정황，이용비포화삼투시험장치측정공극비위3.0、2.5화2.0적랄급토토수특정곡선。이용FLAC-3D연건진행포화비포화비항정삼류이유분석료해랄급전매장재불동강우조건하적지하수위분포화변화특성。연구성과표명：랄급토인성분복잡、공극대등특점，기토수특정곡선포화체적함수량교고，수착흡력증가，곡선존재두강단，저여랄급토중함유유궤성분유관；산곡형전매장재조우폭우화구우공황하，도회인기전매장내부수위쾌속상승，배수릉체엄중어도시，삼려액수위환장종랄급패일출，재강우총량일치조건하，련속구우비단시폭우대전매장은정성경위불리。
Valley-type landfill if failure occurs or impermeable layer surface drainage prism ineffective drainage during rainfall rainwater directly into the landfill failed to effectively ruled out, leading to the landfill level rise,increased pore pressure situation,excessive leachate levels can easily lead to the destruction of landfill instability.A Southwest landfill for municipal solid waste components ,the use of unsaturated hydraulic test device for measuring the void ratio garbage Soil water characteristic curve 3.0 ,2.5 and 2.0. FLAC-3D software for use saturated and unsaturated unsteady seepage analysis of two-dimensional distribution of the groundwater level and changes the characteristics of the landfill under different rainfall conditions.Research shows that: garbage because the soil complex composition ,porosity and other characteristics ,the higher its SWCC saturated volumetric water content ,with the suction increases the presence of steep drop curve seg-ment,which contains organic ingredients related to soil and trash;valley type landfill conditions in the event of heavy rains and long period of rain,the water level inside the landfill will cause a rapid increase,when the prism serious clogging drainage,garbage leachate water will spill from the dam under identical conditions of total rainfall,continuous long Short rain storm than more unfavorable for the stability of the landfill.