对土工膜尺寸进行裁剪时应预留一定的富余度

1)关于土(tu)(tu)工(gong)膜的施(shi)工(gong)，本案例(li)采用(yong)流水方式(shi)进(jin)(jin)(jin)行(xing)作(zuo)业。首先，对(dui)(dui)铺(pu)(pu)设(she)场(chang)地的地基(ji)进(jin)(jin)(jin)行(xing)整(zheng)理，即在(zai)铺(pu)(pu)设(she)场(chang)地上(shang)(shang)先铺(pu)(pu)设(she)一层(ceng)(ceng)10cm左(zuo)右的黏(nian)土(tu)(tu)层(ceng)(ceng)或者膨润土(tu)(tu)作(zuo)为(wei)垫层(ceng)(ceng)，铺(pu)(pu)设(she)过(guo)程(cheng)中配(pei)合机械设(she)备对(dui)(dui)土(tu)(tu)层(ceng)(ceng)进(jin)(jin)(jin)行(xing)压实(shi)(shi)处理以(yi)(yi)保(bao)(bao)证黏(nian)土(tu)(tu)层(ceng)(ceng)或膨润土(tu)(tu)层(ceng)(ceng)密实(shi)(shi)度达(da)(da)到要(yao)求。其(qi)次，将(jiang)(jiang)前期裁(cai)剪好并(bing)卷起(qi)的土(tu)(tu)工(gong)膜运输(shu)(shu)(shu)到工(gong)作(zuo)场(chang)地的一端并(bing)按照操作(zuo)规(gui)范将(jiang)(jiang)其(qi)展(zhan)开(kai)。在(zai)展(zhan)开(kai)过(guo)程(cheng)中，施(shi)工(gong)人员不(bu)断(duan)地使(shi)用(yong)干(gan)燥抹布对(dui)(dui)土(tu)(tu)工(gong)膜的缝合面(mian)进(jin)(jin)(jin)行(xing)擦拭，同时自(zi)上(shang)(shang)而(er)下对(dui)(dui)土(tu)(tu)工(gong)膜进(jin)(jin)(jin)行(xing)及时的焊接处理。焊接工(gong)作(zuo)完成(cheng)后(hou)，开(kai)展(zhan)了气压试验检测工(gong)作(zuo)以(yi)(yi)确保(bao)(bao)焊接的质量达(da)(da)标。在(zai)质量满足要(yao)求后(hou)将(jiang)(jiang)整(zheng)个土(tu)(tu)工(gong)膜的四周全部卷起(qi)约50cm。完成(cheng)以(yi)(yi)上(shang)(shang)工(gong)序后(hou)，利用(yong)运输(shu)(shu)(shu)设(she)备将(jiang)(jiang)其(qi)输(shu)(shu)(shu)送到指定位置并(bing)开(kai)展(zhan)铺(pu)(pu)设(she)工(gong)作(zuo)，最后(hou)使(shi)用(yong)相同的方法在(zai)上(shang)(shang)面(mian)铺(pu)(pu)设(she)一层(ceng)(ceng)保(bao)(bao)护(hu)层(ceng)(ceng)，其(qi)作(zuo)用(yong)是对(dui)(dui)土(tu)(tu)工(gong)膜进(jin)(jin)(jin)行(xing)保(bao)(bao)护(hu)，延(yan)长其(qi)使(shi)用(yong)寿命。

2)对土(tu)工(gong)(gong)膜(mo)尺(chi)寸进行裁剪时(shi)，需(xu)要在(zai)(zai)(zai)(zai)实际(ji)规格尺(chi)寸的(de)基础上预(yu)留一定的(de)富(fu)余度(du)。本工(gong)(gong)程案例的(de)富(fu)余度(du)控制在(zai)(zai)(zai)(zai)1．5%左右。在(zai)(zai)(zai)(zai)土(tu)工(gong)(gong)膜(mo)展(zhan)开后，需(xu)快速(su)将(jiang)其拉平以(yi)防止发生收缩现象(xiang)。在(zai)(zai)(zai)(zai)整个(ge)施(shi)工(gong)(gong)过(guo)程中(zhong)，严禁(jin)施(shi)工(gong)(gong)人员穿戴尖(jian)锐鞋(xie)子或携(xie)带其他(ta)尖(jian)锐物(wu)体以(yi)避(bi)免(mian)对土(tu)工(gong)(gong)膜(mo)造(zao)成损(sun)伤。与此同(tong)时(shi)，重型机械(xie)设(she)备也禁(jin)止在(zai)(zai)(zai)(zai)土(tu)工(gong)(gong)膜(mo)表面行走(zou)，对施(shi)工(gong)(gong)过(guo)程中(zhong)损(sun)坏的(de)土(tu)工(gong)(gong)膜(mo)也都进行了(le)及时(shi)的(de)修(xiu)补或更换。

3)土工(gong)(gong)(gong)(gong)膜施(shi)(shi)工(gong)(gong)(gong)(gong)中焊(han)接(jie)是最(zui)为(wei)关键和(he)核心(xin)的(de)(de)一(yi)个(ge)环节。焊(han)接(jie)质(zhi)量(liang)的(de)(de)优(you)劣(lie)将对(dui)(dui)土工(gong)(gong)(gong)(gong)膜施(shi)(shi)工(gong)(gong)(gong)(gong)质(zhi)量(liang)产生决定性(xing)的(de)(de)影响。为(wei)确保(bao)焊(han)接(jie)质(zhi)量(liang)，所有参(can)与焊(han)接(jie)的(de)(de)现场人(ren)员都进(jin)行(xing)了专门(men)的(de)(de)培训，通过考(kao)核并(bing)获得(de)证书(shu)后方才进(jin)入本工(gong)(gong)(gong)(gong)程案例现场进(jin)行(xing)施(shi)(shi)工(gong)(gong)(gong)(gong)。此外(wai)，施(shi)(shi)工(gong)(gong)(gong)(gong)单(dan)位还组织(zhi)施(shi)(shi)工(gong)(gong)(gong)(gong)人(ren)员在现场开(kai)展焊(han)接(jie)试验工(gong)(gong)(gong)(gong)作并(bing)对(dui)(dui)各焊(han)接(jie)工(gong)(gong)(gong)(gong)艺参(can)数进(jin)行(xing)优(you)化调整，从而得(de)到最(zui)优(you)的(de)(de)工(gong)(gong)(gong)(gong)艺参(can)数。