填埋场雨污分流等工程中HDPE土工膜的铺装要求

（1）在铺设HDPE土工膜之前，需要先对铺设位置进行相关的准备工作，对该区域进行尺寸测量，并按照该尺寸寻找相对应的HDPE土工膜，而后将其运往锚固沟的区域。为使HDPE土工膜在铺设的过程中能够始终保持稳固，应对扇形部分进行有效裁剪，使上下端都能够锚固牢固。裁剪HDPE土工膜时需要特别注意的是裁剪方式应尽量符合工程需求，不浪费HDPE土工膜，且焊缝的数量应当尽可能减少。

（2）在(zai)对(dui)HDPE土(tu)工(gong)(gong)(gong)膜(mo)进(jin)行(xing)实地铺(pu)(pu)设(she)时(shi)(shi)，应(ying)(ying)当(dang)(dang)(dang)充分考虑施(shi)工(gong)(gong)(gong)过(guo)程(cheng)(cheng)当(dang)(dang)(dang)中(zhong)的(de)温(wen)(wen)度(du)控制(zhi)，一般施(shi)工(gong)(gong)(gong)温(wen)(wen)度(du)需保(bao)持在(zai)5～40℃。另(ling)外，由(you)于(yu)HDPE土(tu)工(gong)(gong)(gong)膜(mo)的(de)热胀冷缩现象非(fei)常明显，因此若施(shi)工(gong)(gong)(gong)时(shi)(shi)温(wen)(wen)度(du)比较低，则(ze)土(tu)工(gong)(gong)(gong)膜(mo)铺(pu)(pu)设(she)应(ying)(ying)当(dang)(dang)(dang)尽(jin)量(liang)紧凑，而(er)在(zai)环境温(wen)(wen)度(du)较高(gao)时(shi)(shi)，HDPE土(tu)工(gong)(gong)(gong)膜(mo)铺(pu)(pu)设(she)应(ying)(ying)当(dang)(dang)(dang)相对(dui)偏松。夏天(tian)温(wen)(wen)度(du)非(fei)常高(gao)，应(ying)(ying)当(dang)(dang)(dang)尽(jin)量(liang)避免在(zai)中(zhong)午(wu)高(gao)温(wen)(wen)时(shi)(shi)间段(duan)铺(pu)(pu)设(she)HDPE土(tu)工(gong)(gong)(gong)膜(mo)。若施(shi)工(gong)(gong)(gong)过(guo)程(cheng)(cheng)中(zhong)风力(li)(li)较大，并且已经超过(guo)4级(ji)，则(ze)此时(shi)(shi)不(bu)再适合(he)HDPE土(tu)工(gong)(gong)(gong)膜(mo)的(de)施(shi)工(gong)(gong)(gong)标准，且雨雪天(tian)气也不(bu)适合(he)进(jin)行(xing)相关(guan)的(de)铺(pu)(pu)设(she)过(guo)程(cheng)(cheng)。若环境风力(li)(li)较小，则(ze)应(ying)(ying)在(zai)HDPE土(tu)工(gong)(gong)(gong)膜(mo)上面覆盖(gai)较重物(wu)品(pin)，如(ru)沙袋，以防止铺(pu)(pu)设(she)时(shi)(shi)HDPE土(tu)工(gong)(gong)(gong)膜(mo)位置偏移。