Research On Thickness Of Covering Soil In Landfill Based On Soil Physical Properties

At present, the disposal of demolition of the construction waste from old villageis mainly based on landfill, landfill is thought to be the easiest and most economicalway to dispose waste. Relocation of villages produces lots of construction waste, needto landfill and faced with the problem of determining suitable covering soil. Thicknessof covering soil determined by vegetation and climate, different type of vegetationsrequire different thickness of substrate, the results of other areas don’t have universalapplicability.This article combines with the type of demolition of the construction waste,dividing into three types, brick and concrete, brick, cement, each of the three types ofconstruction waste covered with60cm,100cm,120cm soil thickness, choosing soilbulk density, soil porosity, soil moisture, saturated water content, capillary waterphysical indicators, determining appropriate covering soil thickness by cropsdemanding for soil physical properties. This article is divided into three parts: Thefirst section includes Chapter1and Chapter2, in this section the background andsignificance of choosing this topic, also the research status and lack of thickness ofcovering soil in landfill and soil physical properties were described systematically;The second part refers to Chapter3and Chapter4, describing the study area,construction of the test area, collection and process data, The third part refers toChapter5、6、7、8, analyzing the reclaimed soil effects of brick and concrete, brick,cement base by soil physical properties, studying different type of covering thicknessaffect the soil physical properties, clearing suitable landfill technology of garbagebase and components and determining appropriate covering soil thickness.The following conclusions can be obtained by the studies above:1) This article combines with the type of demolition of the construction waste,designing different type of landfill base, determining suitable covering soil thicknessbased on soil physical properties, the result shows that: reclaimed soil of brick andconcrete base were better and the best thickness of covering soil is100cm.2) Studying the trend of soil physical properties of reclaimed soil with time, theresult shows that: the time that construction waste reclaimed soil physical propertiesreach a steady state is15months. By sampling analysis of three times, October2012,May2013and October2013, the results show that from October2012to May2013and then to October2013, the performance of the physical properties of three times soil collected as follows: gap of reclaimed soil physical properties and cultivated soilis relatively large to be reduced and then to be consistent with the cultivated soilphysical properties.