上游坝坡膜上碎石垫层及混凝土预制块运输方案分析

库(ku)区(qu)防(fang)渗(shen)由坝(ba)坡面防(fang)渗(shen)及库(ku)底防(fang)渗(shen)两部分组成，均(jun)采(cai)用土工膜进行防(fang)渗(shen)。坝(ba)坡面上层(ceng)土工布表面设(she)置(zhi)上垫(dian)层(ceng)及护面，上垫(dian)层(ceng)采(cai)用碎石垫(dian)层(ceng)，护面采(cai)用C15混(hun)凝土预制块护面。

某水库(ku)上(shang)游(you)坝(ba)面(mian)护坡(po)(po)斜长69.18m，高程1028.00m设(she)(she)(she)置有(you)2.00m宽的戗台。跟以(yi)往工(gong)(gong)(gong)(gong)程不(bu)同(tong)，垫(dian)层料(liao)及(ji)(ji)(ji)混凝(ning)土(tu)(tu)(tu)预制(zhi)块(kuai)(kuai)无法(fa)直接在坝(ba)坡(po)(po)面(mian)上(shang)运(yun)(yun)(yun)输(shu)，碎石(shi)垫(dian)层及(ji)(ji)(ji)混凝(ning)土(tu)(tu)(tu)预制(zhi)块(kuai)(kuai)铺(pu)设(she)(she)(she)以(yi)人(ren)工(gong)(gong)(gong)(gong)铺(pu)设(she)(she)(she)为(wei)主，大(da)量(liang)的人(ren)工(gong)(gong)(gong)(gong)在已铺(pu)设(she)(she)(she)土(tu)(tu)(tu)工(gong)(gong)(gong)(gong)膜的土(tu)(tu)(tu)工(gong)(gong)(gong)(gong)布表面(mian)往复行走，运(yun)(yun)(yun)输(shu)材(cai)料(liao)、铺(pu)设(she)(she)(she)垫(dian)层和(he)铺(pu)设(she)(she)(she)混凝(ning)土(tu)(tu)(tu)预制(zhi)块(kuai)(kuai)，极(ji)易造成土(tu)(tu)(tu)工(gong)(gong)(gong)(gong)膜因往复踩踏(ta)而出现(xian)孔洞和(he)土(tu)(tu)(tu)工(gong)(gong)(gong)(gong)膜下滑，导致土(tu)(tu)(tu)工(gong)(gong)(gong)(gong)膜渗漏(lou)。如(ru)何最(zui)大(da)限(xian)度减(jian)少(shao)材(cai)料(liao)运(yun)(yun)(yun)输(shu)及(ji)(ji)(ji)铺(pu)设(she)(she)(she)施(shi)工(gong)(gong)(gong)(gong)对(dui)坡(po)(po)面(mian)土(tu)(tu)(tu)工(gong)(gong)(gong)(gong)膜影响和(he)损伤(shang)是(shi)一(yi)大(da)难点，也(ye)是(shi)必须要保(bao)证的，上(shang)游(you)坝(ba)坡(po)(po)膜上(shang)碎石(shi)垫(dian)层及(ji)(ji)(ji)混凝(ning)土(tu)(tu)(tu)预制(zhi)块(kuai)(kuai)运(yun)(yun)(yun)输(shu)是(shi)重(zhong)点，也(ye)是(shi)关键。因此(ci)，通过方(fang)案的比较分(fen)析，最(zui)终采用垫(dian)层料(liao)及(ji)(ji)(ji)混凝(ning)土(tu)(tu)(tu)预制(zhi)块(kuai)(kuai)坡(po)(po)面(mian)运(yun)(yun)(yun)输(shu)方(fang)案选择马(ma)道以(yi)下采用汽车式起重(zhong)机运(yun)(yun)(yun)输(shu)，马(ma)道以(yi)上(shang)采用溜槽运(yun)(yun)(yun)输(shu)，最(zui)大(da)限(xian)度减(jian)少(shao)了(le)(le)施(shi)工(gong)(gong)(gong)(gong)过程对(dui)土(tu)(tu)(tu)工(gong)(gong)(gong)(gong)膜的影响，保(bao)证了(le)(le)施(shi)工(gong)(gong)(gong)(gong)质量(liang)，保(bao)障了(le)(le)施(shi)工(gong)(gong)(gong)(gong)进度。