西北干旱地区危废填埋场封场技术特点探讨

干旱少雨、降雨分布不均、水资源短缺与恶化、风沙肆虐、大风天气较多、土壤退化、水土流失严重等是西北地区典型的生态环境问题，结合西北地区特色气候环境条件与危废填埋场的封场技术条件，探讨适合西北干旱地区危废填埋场的封场结构技术，适当降低封场排气层要求，提高防渗层、排水层、保护层的布置条件，选择适宜的植被类型，因地制宜进行封场后的土地利用一建设堆肥场或废弃物无害化处理场等，封场顶布置以中心向四边约5％的纵向坡度，并设置截洪沟和泄洪马道，合理有效地进行填埋场封场，最大限度地减少对环境的二次污染。

Discussion on the Enclosure Technology Characteristics of Dangerous and Disused Landfill Site in Arid Areas of Northwest China

Drought,lack of rain,the uneven rainfall distribution,lack and worsening of water resources,the sandstorm wreaking,much gale weather,the soil's degradation,serious soil erosion are the typical ecological environment problems in Northwestern Region.Combining the Northwestern Region's characteristic climatic environment conditions with the danger fill in waste bury the field to seal the field engineering factor,the suitable enclosure suture technologies of dangerous and disused landfill site in arid areas of Northwestern Region were discussed.Some measures were taken,including reducing suitably the requests of field-closure exhaust layer,enhancing the arrangement conditions of the impermeable layer drainage layer and protective layer,selecting the appropriate type of vegetation,building the land utilization-construction compost site or reject detoxification processing field after enclosure according to the local conditions,arranging approximately 5% longitudinal slope from center to four sides on the field top,setting truncation kennel and the flood discharge driftway,closing the landfill site reasonably and effectively,minimizing the environmental secondary pollution.