保证渗滤液得到有组织收集、处理的基本前提
防渗系统可以有效阻止渗滤液(ye)渗入地下(xia)(xia)或周边水(shui)(shui)体污染(ran)环境，是保证渗滤液(ye)得到有组织收集、处理(li)的基本前提(ti)。本项目(mu)采(cai)用膨润土防水(shui)(shui)毯＋HDPE膜的人工(gong)复(fu)合(he)防渗结构，防渗系统结构设计(ji)如(ru)下(xia)(xia)。
场(chang)底(di)区域（从(cong)上往下(xia)）：垃(la)圾(ji)堆(dui)体、230g/m2长(zhang)丝机(ji)织(zhi)土(tu)(tu)工布（反(fan)滤层(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)）、40cm厚(hou)(hou)卵石层(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)（渗(shen)滤液(ye)水(shui)平导(dao)流(liu)层(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)）、600g/m2长(zhang)纤无(wu)纺土(tu)(tu)工布（膜(mo)(mo)上保(bao)护(hu)层(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)）、2.0mm厚(hou)(hou)光面HDPE膜(mo)(mo)（主(zhu)防渗(shen)层(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)）、5000g/m2GCL（膜(mo)(mo)下(xia)保(bao)护(hu)层(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)）、50cm厚(hou)(hou)压实(shi)黏(nian)土(tu)(tu)层(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)（膜(mo)(mo)下(xia)保(bao)护(hu)层(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)，地下(xia)水(shui)隔离(li)层(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)）、200g/m2长(zhang)丝无(wu)纺土(tu)(tu)工布（保(bao)护(hu)层(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)）、50cm厚(hou)(hou)卵石层(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)（地下(xia)水(shui)导(dao)流(liu)层(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)）、230g/m2长(zhang)丝机(ji)织(zhi)土(tu)(tu)工布（反(fan)滤层(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)）、压实(shi)场(chang)底(di)（场(chang)底(di)基础）。边坡(po)区域（从(cong)上往下(xia)）：垃(la)圾(ji)堆(dui)体、30cm厚(hou)(hou)袋装黏(nian)土(tu)(tu)层(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)（膜(mo)(mo)上保(bao)护(hu)层(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)）、8mm厚(hou)(hou)土(tu)(tu)工复(fu)合(he)(he)排水(shui)网（渗(shen)滤液(ye)导(dao)排层(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)）、600g/m2长(zhang)纤无(wu)纺土(tu)(tu)工布（膜(mo)(mo)上保(bao)护(hu)层(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)）、2.0mm厚(hou)(hou)糙面HDPE膜(mo)(mo)（主(zhu)防渗(shen)层(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)）、5000g/m2GCL（膜(mo)(mo)下(xia)保(bao)护(hu)层(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)）、8mm厚(hou)(hou)土(tu)(tu)工复(fu)合(he)(he)排水(shui)网（地下(xia)水(shui)导(dao)排层(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)）、压实(shi)边坡(po)（边坡(po)基础）。
该垃圾(ji)填(tian)埋场以矿化(hua)垃圾(ji)为主(zhu)，填(tian)埋气(qi)体(ti)(ti)产生量小，所以，采用导气(qi)石笼进行填(tian)埋气(qi)体(ti)(ti)导排(pai)。石笼纵横向布(bu)置间距为20m，长度不(bu)(bu)小于垃圾(ji)堆体(ti)(ti)2/3深度，底部距离防渗系统不(bu)(bu)小于2.0m，石笼直(zhi)径(jing)为1.0m，排(pai)气(qi)管顶部高出封场覆盖绿化(hua)层(ceng)不(bu)(bu)小于2.0m。
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