符合标准的复合土工膜在调蓄水池中的应用要点

复合土工膜施工对连续性和稳定性有很高的要求，因此，必须切实做好施工前的准备工作，保证各道工序有序进行从而保证施工质量。施工前的准备工作主要包括以下方面。

1)原材料(liao)准备。为保证(zheng)调蓄水(shui)池防渗质(zhi)量，所用(yong)复(fu)(fu)合(he)(he)(he)土(tu)(tu)工(gong)(gong)(gong)(gong)膜(mo)的质(zhi)量必须(xu)满足(zu)《土(tu)(tu)工(gong)(gong)(gong)(gong)合(he)(he)(he)成材料(liao)非织(zhi)造复(fu)(fu)合(he)(he)(he)土(tu)(tu)工(gong)(gong)(gong)(gong)膜(mo)》(GB/T17642—2008)相关要求(qiu)。在(zai)选(xuan)(xuan)择采购(gou)商(shang)时，要选(xuan)(xuan)择信(xin)誉好、综合(he)(he)(he)实(shi)力强的采购(gou)商(shang)，而且需要出具(ju)国家认证(zheng)的检测(ce)报告和出厂合(he)(he)(he)格(ge)证(zheng)，并由第三方检测(ce)单(dan)位进行(xing)检测(ce)。检测(ce)合(he)(he)(he)格(ge)后方能(neng)应用(yong)到项目施工(gong)(gong)(gong)(gong)中，尤其是在(zai)选(xuan)(xuan)择复(fu)(fu)合(he)(he)(he)土(tu)(tu)工(gong)(gong)(gong)(gong)膜(mo)宽度(du)时，需要在(zai)满足(zu)厚度(du)要求(qiu)的前提下(xia)，使复(fu)(fu)合(he)(he)(he)土(tu)(tu)工(gong)(gong)(gong)(gong)膜(mo)接缝最少，从(cong)工(gong)(gong)(gong)(gong)厂运输(shu)到施工(gong)(gong)(gong)(gong)现(xian)场的复(fu)(fu)合(he)(he)(he)土(tu)(tu)工(gong)(gong)(gong)(gong)膜(mo)需要在(zai)当天用(yong)完，本工(gong)(gong)(gong)(gong)程(cheng)采取了(le)两(liang)布一膜(mo)复(fu)(fu)合(he)(he)(he)土(tu)(tu)工(gong)(gong)(gong)(gong)膜(mo)，物理力学(xue)性能(neng)指标如(ru)表1所示。

2)在(zai)复合土(tu)工(gong)(gong)(gong)膜正式施工(gong)(gong)(gong)前，需要检查基(ji)层(ceng)支撑层(ceng)是否具备(bei)施工(gong)(gong)(gong)条件，保(bao)证基(ji)面(mian)相(xiang)对(dui)干燥，含(han)水率不(bu)应超(chao)过15%，压实(shi)度(du)在(zai)95%以上(shang)，且表面(mian)要相(xiang)对(dui)平(ping)整(zheng)、无(wu)裂缝、无(wu)坑陷，坡度(du)均匀，铺设(she)复合土(tu)工(gong)(gong)(gong)膜范(fan)围内平(ping)直(zhi)度(du)要平(ping)缓变化，阴角和(he)阳角位置要圆滑。