乳化瀝青透層(ceng)油在高旱地域養護(hu)基層(ceng)中(zhong)的運用 瀝清 混(hun)凝(ning)(ning)(ning)土(tu)(tu)(tu)工程(cheng)量清單為(wei)144萬m3,混(hun)凝(ning)(ning)(ning)土(tu)(tu)(tu)堅固(gu)砂礫石544萬m3(725萬m2)。瀝清 整體面層(ceng)設計(ji)方案(an)共3層(ceng),辨別為(wei):上邊層(ceng),5Cm中(zhong)粒(li)式AC-16C乳化瀝青混(hun)凝(ning)(ning)(ning)土(tu)(tu)(tu);中(zhong)整體面層(ceng),4Cm中(zhong)粒(li)式AC-20C乳化瀝青混(hun)凝(ning)(ning)(ning)土(tu)(tu)(tu);下邊層(ceng),7Cm密級配AC-25C粗(cu)粒(li)式瀝清 混(hun)凝(ning)(ning)(ning)土(tu)(tu)(tu)。基層(ceng)為(wei)18Cm厚(hou)的5%混(hun)凝(ning)(ning)(ning)土(tu)(tu)(tu)堅固(gu)砂礫石。
類別處在額濟納戈(ge)壁灘地域,屬暖溫帶荒蕪干旱(han)區,為(wei)楷模(mo)的大陸型景色,以沙(sha)塵大、旱(han)災(zai)降(jiang)雨少(shao)(shao)、日(ri)照充足、揮(hui)發明顯為(wei)關(guan)鍵特性(xing)。年降(jiang)水量80~220Mm,年年降(jiang)雨量近4000Mm;日(ri)照歲月3316h;年勻稱平均(jun)氣溫7。2℃;雷(lei)暴日(ri)120~180d;沙(sha)塵很(hen)(hen)大,不起風的氣候較少(shao)(shao),且(qie)風力很(hen)(hen)大。
景色自然環(huan)境十分差(cha),全(quan)程大(da)(da)(da)部(bu)分地區處在沒有人、沒有水(shui)、無植物(wu)(wu)群落的干旱氣候,沿(yan)岸能用(yong)水(shui)源十分稀(xi)有,僅有的是(shi)多少處能用(yong)地下水(shui)中(zhong)堿性物(wu)(wu)質(zhi)成分很大(da)(da)(da),不可以用(yong)以基(ji)層(ceng)施工及養(yang)護。基(ji)層(ceng)施工及養(yang)護的水(shui)大(da)(da)(da)部(bu)分是(shi)離施工工地30~50km外取的地表水(shui)。
何處理(li)基層(ceng)(ceng)施(shi)工(gong)及養(yang)護中的自(zi)來水(shui)(shui)難題,并確(que)保(bao)(bao)(bao)盡可能勤儉(jian)節約水(shui)(shui)源,保(bao)(bao)(bao)證大水(shui)(shui)準地維(wei)護保(bao)(bao)(bao)養(yang)自(zi)然環(huan)境,是擺放在(zai)我們施(shi)工(gong)方法工(gong)作人員眼前(qian)的課題研究。因此在(zai)基層(ceng)(ceng)施(shi)工(gong)完,破即透層(ceng)(ceng)乳化(hua)瀝青透層(ceng)(ceng)油(you)開展(zhan)養(yang)護,不(bu)但確(que)保(bao)(bao)(bao)了施(shi)工(gong)質(zhi)量(liang),另外(wai)也勤儉(jian)節約了成本,維(wei)護保(bao)(bao)(bao)養(yang)了本地的水(shui)(shui)源,大水(shui)(shui)準地維(wei)護保(bao)(bao)(bao)養(yang)了自(zi)然環(huan)境。
某些養護(hu)是(shi)(shi)采用(yong)籠(long)罩(zhao)養護(hu),籠(long)罩(zhao)物關鍵(jian)有塑料膜(mo)、單邊無紡(fang)土工布等不吸(xi)水(shui)(shui)性材料。某些的作法是(shi)(shi)在基層輾(zhan)壓(ya)完畢后(hou),稍(shao)灑(sa)一(yi)些水(shui)(shui),然(ran)后(hou)籠(long)罩(zhao)。但在具(ju)體的施(shi)工中由(you)于大風(feng),籠(long)罩(zhao)物籠(long)罩(zhao)好(hao)后(hou)難以確保不被風(feng)輕(qing)(qing)(qing)輕(qing)(qing)(qing)吹壞或(huo)吹走,僅有被風(feng)輕(qing)(qing)(qing)輕(qing)(qing)(qing)吹開一(yi)個口子,里邊的水(shui)(shui)份便會迅速(su)消退,務(wu)必(bi)開展(zhan)補水(shui)(shui)保濕養護(hu)。
而由(you)于籠罩物為(wei)不吸(xi)水性材料,給補水保濕又導致(zhi)非常大的艱難,難以將(jiang)所有(you)(you)的基層為(wei)名(ming)開展(zhan)潮(chao)濕,導致(zhi)基層部(bu)分養護(hu)不及時(shi),在中后期的查(cha)驗及鉆(zhan)芯抽樣過程中,抗壓強度不夠,為(wei)名(ming)松散,留有(you)(you)質量(liang)安全隱患,重特大的地(di)區有(you)(you)開展(zhan)部(bu)分返修的狀況(kuang)。