“”填埋场"封场结构要求 Requirements for the closure structure of the landfill site

封场结构要求：

Requirements for site closure structure:

填埋场封场覆盖结构各层由下至上依次为：排气层、防渗层、排水层与植被层。填埋场封场覆盖应符合下列规定：

The covering structure of the landfill site is composed of exhaust layer, anti-seepage layer, drainage layer, and vegetation layer from bottom to top. The closure and coverage of landfill sites should comply with the following regulations:

{1}排气层：堆体顶面采用粗粒或多孔材料，厚度不宜小于30cm，边坡采土工复合排水网，厚度不应小于5mm；

{1} Exhaust layer: The top surface of the pile body should be made of coarse or porous materials, with a thickness not less than 30cm. The slope should be equipped with a geotextile composite drainage network, with a thickness not less than 5mm;

{2}排水层：堆体顶面宜采用粗粒或多孔材料，厚度不宜小于30cm。边坡采用土工复合排水网，厚度不应小于5mm；也可采用加筋土工网垫，规格不宜小于600g/m2.

{2} Drainage layer: The top surface of the pile should be made of coarse-grained or porous materials, and the thickness should not be less than 30cm. The slope adopts a geotextile composite drainage network, and the thickness should not be less than 5mm; Reinforced geotextile mesh pads can also be used, with a specification not less than 600g/m2

{3}植被层：采用自然土加表层营养土，厚度根据种植植物的根系深浅确定，厚度不小于50cm，其中营养土厚度不小于15cm.

{3} Vegetation layer: Natural soil and surface nutrient soil are used, and the thickness is determined based on the depth of the plant root system. The thickness is not less than 50cm, and the nutrient soil thickness is not less than 15cm

防渗要求：

Anti seepage requirements:

1、采用HDPE土工膜或LLDPE土工膜，厚度不应小于1mm，膜上敷设非织造土工布，规格不小于300g/m2；膜下敷设保护层。

1. HDPE geomembrane or LLDPE geomembrane shall be used, with a thickness of not less than 1mm. Non woven geotextile shall be laid on the membrane, with a specification of not less than 300g/m2; Lay a protective layer under the membrane.

2、采用粘土，黏土层的渗透系数不应大于1.0*10-7cm/s.

2. Using clay, the permeability coefficient of the clay layer should not exceed 1.0 * 10-7cm/s

厚度不应小于30cm.

The thickness should not be less than 30cm

                                                                      封场结构示意图