公路鋼波紋管更大直徑兩側50cm外使用(yong)18T壓(ya)路機(ji)(ji)碾(nian)壓(ya),50cm范圍(wei)內使用(yong)小型夯(hang)(hang)實機(ji)(ji)械夯(hang)(hang)實,以(yi)避免壓(ya)路機(ji)(ji)等大型機(ji)(ji)械設(she)(she)備對管涵的(de)撞擊(ji)。進(jin)場后(hou)對設(she)(she)計單位(wei)交(jiao)接的(de)水(shui)準(zhun)(zhun)點(dian)(dian)和(he)導線(xian)點(dian)(dian)進(jin)行復扳,庇(bi)和(he)差(cha)符和(he)設(she)(she)計要求后(hou),進(jin)行導線(xian)點(dian)(dian)、水(shui)準(zhun)(zhun)點(dian)(dian)的(de)加(jia)密(mi),每30米(mi)范圍(wei)內有一(yi)個(ge)水(shui)準(zhun)(zhun)點(dian)(dian),加(jia)密(mi)點(dian)(dian)必須進(jin)行庇(bi)和(he)平差(cha)水(shui)準(zhun)(zhun)點(dian)(dian)的(de)庇(bi)和(he)差(cha)為20√L,確保(bao)加(jia)密(mi)點(dian)(dian)的(de)準(zhun)(zhun)確,以(yi)滿(man)足排(pai)水(shui)管高(gao)程、線(xian)型控(kong)制的(de)精(jing)度。
一(yi)分鐘速覽:公路鋼波紋管的換填厚度是多少?
當溝槽開挖遇有地(di)下水(shui)(shui)(shui)時,設置(zhi)排水(shui)(shui)(shui)溝、集水(shui)(shui)(shui)坑,及時做好溝槽內地(di)下水(shui)(shui)(shui)的(de)排水(shui)(shui)(shui)降水(shui)(shui)(shui)工作,并采取(qu)先鋪卵石(shi)或碎石(shi)層(ceng)(厚度不(bu)小于100mm)的(de)地(di)基(ji)(ji)加固措施;當無地(di)下水(shui)(shui)(shui)時,基(ji)(ji)礎下素土夯實(shi),壓實(shi)系數大(da)于0.93:當遇有淤(yu)泥、雜填(tian)土等軟弱地(di)基(ji)(ji)時,按(an)管(guan)道處理要求采用極配戈壁土進行換填(tian)處理:換填(tian)厚度為30cm。
鐵路鋼波紋(wen)管
達(da)到(dao)(dao)每種管(guan)徑(jing)的小覆土厚度(du)(du)后(hou)采(cai)用振動式壓路機(ji)碾壓,可(ke)允許施工(gong)機(ji)械通行。涵管(guan)兩側與基樁(zhuang)同(tong)寬范圍至涵頂部分屬于(yu)特別夯實區的回填(tian)要采(cai)用級(ji)配良(liang)好的天然砂礫或(huo)級(ji)配碎石(shi)。填(tian)筑時應分層(ceng)填(tian)筑、分層(ceng)壓實,每層(ceng)壓實后(hou)的厚度(du)(du)為20cm,壓實度(du)(du)要求(qiu)達(da)到(dao)(dao)95%方可(ke)進(jin)行下層(ceng)填(tian)筑。
由于管(guan)道中(zhong)踢樁(zhuang)在(zai)(zai)施工(gong)(gong)中(zhong)要被挖掉,因此(ci)在(zai)(zai)不受施工(gong)(gong)干擾施測方(fang)(fang)便、易于保護的地方(fang)(fang)測設(she)施工(gong)(gong)控(kong)(kong)制(zhi)樁(zhuang),測設(she)中(zhong)踢方(fang)(fang)向控(kong)(kong)制(zhi)樁(zhuang),采(cai)用(yong)延長線(xian)或導線(xian)法,測設(she)附(fu)屬構(gou)筑(zhu)(zhu)(zhu)物(wu)位置控(kong)(kong)制(zhi)樁(zhuang),采(cai)用(yong)交會法或平行踢法。填筑(zhu)(zhu)(zhu)前在(zai)(zai)管(guan)節兩側上用(yong)紅色油漆按毎20c皿高度標注,填筑(zhu)(zhu)(zhu)時(shi)按標注線(xian)控(kong)(kong)制(zhi)。
嚴格(ge)控制溝槽(cao)開挖(wa)放(fang)(fang)坡系(xi)數,按(an)設計的放(fang)(fang)坡系(xi)數挖(wa)夠寬度,開挖(wa)時應注意溝槽(cao)土(tu)質情況,必要時應請駐(zhu)地(di)監(jian)理和甲(jia)方及設計代表現場確定放(fang)(fang)坡系(xi)數,以防槽(cao)邊塌方。溝槽(cao)開挖(wa)的土(tu)方直(zhi)接(jie)裝車外(wai)運外(wai)運地(di)點(dian)指(zhi)定。填筑(zhu)必須(xu)在涵管(guan)兩側(ce)(ce)同步對稱進行,兩側(ce)(ce)的回填土(tu)高差不(bu)得大于(yu),管(guan)頂(ding)填土(tu)厚(hou)度小于(yu)50cm時,不(bu)得使用大于(yu)6T的壓路機械碾壓,也不(bu)允許施(shi)工機械通(tong)行。(hanihanbj.com)
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