复合型土工膜基本的铺设技巧
土工(gong)(gong)膜(mo)铺(pu)设在(zai)作(zuo)业区(qu)基(ji)(ji)坑开(kai)挖、坝基(ji)(ji)填(tian)方完后(hou),就可以开(kai)展库底土工(gong)(gong)膜(mo)铺(pu)设,铺(pu)膜(mo)前最(zui)先用(yong)震动(dong)碾辗(zhan)压库底,做到(dao)设计构(gou)思规定干密度后(hou),用(yong)人工(gong)(gong)服务开(kai)展整平(ping)基(ji)(ji)本面(mian),消除基(ji)(ji)准面(mian)尖棱硬(ying)块(kuai)等脏物,使表层无斜坡、错台、积水(shui)和浮土,做到(dao)整平(ping)光洁,为保证做到(dao)防水(shui)层实(shi)际效(xiao)果,在(zai)施工(gong)(gong)时膜(mo)下基(ji)(ji)本基(ji)(ji)土喷撒灭草剂。
复合(he)型土工(gong)(gong)(gong)膜(mo)(mo)(mo)选(xuan)用0.4mm两布一膜(mo)(mo)(mo),铺(pu)(pu)(pu)(pu)膜(mo)(mo)(mo)基本经技术(shu)工(gong)(gong)(gong)程师(shi)工(gong)(gong)(gong)程验收合(he)格后(hou)(hou),融合(he)砂(sha)砾(li)石保(bao)(bao)护(hu)层厚(hou)度(du)(du)摊铺(pu)(pu)(pu)(pu)按无(wu)纺土工(gong)(gong)(gong)布幅(fu)长(zhang)度(du)(du)宽(kuan)幅(fu)按段次(ci)序开(kai)展施(shi)(shi)工(gong)(gong)(gong),并(bing)随砂(sha)砾(li)石保(bao)(bao)护(hu)层厚(hou)度(du)(du)摊铺(pu)(pu)(pu)(pu)拓宽(kuan),铺(pu)(pu)(pu)(pu)设(she)刚开(kai)始以(yi)卷长(zhang)顺流(liu)方位铺(pu)(pu)(pu)(pu)设(she),上下游(you)幅(fu)压中下游(you)幅(fu),铺(pu)(pu)(pu)(pu)设(she)应(ying)平稳,紧松适(shi)(shi)合(he),不(bu)可以(yi)绷(beng)拉过紧,应(ying)考虑到适(shi)(shi)合(he)的余幅(fu),但不(bu)可以(yi)产(chan)生皱(zhou)褶,保(bao)(bao)证防(fang)渗土工(gong)(gong)(gong)布与库底的密不(bu)可分迎合(he)。铺(pu)(pu)(pu)(pu)膜(mo)(mo)(mo)前先开(kai)展小地区试铺(pu)(pu)(pu)(pu),依(yi)据(ju)试铺(pu)(pu)(pu)(pu)合(he)格的主要(yao)参(can)数、施(shi)(shi)工(gong)(gong)(gong)组(zu)成、加工(gong)(gong)(gong)工(gong)(gong)(gong)艺(yi)、工(gong)(gong)(gong)艺(yi)流(liu)程工(gong)(gong)(gong)作方法(fa)、性(xing)能(neng)指标,经技术(shu)工(gong)(gong)(gong)程师(shi)准许后(hou)(hou),再(zai)开(kai)展大(da)规模施(shi)(shi)工(gong)(gong)(gong),为避免(mian)防(fang)渗土工(gong)(gong)(gong)布铺(pu)(pu)(pu)(pu)设(she)后(hou)(hou)因挪动钢筋搭接移位,应(ying)在邻部或适(shi)(shi)度(du)(du)位置开(kai)展钢筋锚固,土工(gong)(gong)(gong)膜(mo)(mo)(mo)铺(pu)(pu)(pu)(pu)设(she)中应(ying)防(fang)止(zhi)损坏和环境污染,铺(pu)(pu)(pu)(pu)设(she)后(hou)(hou)不(bu)可长(zhang)期暴晒,应(ying)立即铺(pu)(pu)(pu)(pu)设(she)沙砾(li)保(bao)(bao)护(hu)层厚(hou)度(du)(du)。超低温(0℃下列(lie))施(shi)(shi)工(gong)(gong)(gong)时,土工(gong)(gong)(gong)膜(mo)(mo)(mo)应(ying)呈无(wu)冷冻绵软情(qing)况,不(bu)可有(you)冷冻。
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