U型(xing)槽(cao)還可(ke)(ke)減少(shao)占地(di)面積，水泥U型(xing)槽(cao)機械，一般較梯形斷面渠道節(jie)省渠道占地(di)1/2左右。四是施工簡易，進度快，水溝成(cheng)型(xing)機規格，整體性(xing)強。底(di)縫(feng)具(ju)有可(ke)(ke)調(diao)性(xing)，可(ke)(ke)根據(ju)流量和縱(zong)坡的大小，對(dui)襯砌(qi)底(di)縫(feng)做適當調(diao)節(jie)，大可(ke)(ke)調(diao)節(jie)到24 cm，渠道過水流量可(ke)(ke)達(da)到0.4 m3/s [3]。

U 型(xing)槽(cao)(cao)工(gong)程(cheng)施(shi)工(gong)步驟：1.測量(liang)放樣→土(tu)石方開(kai)挖(wa)→邊(bian)墻(qiang)襯砌(qi)→墊(dian) 層鋪設(she)→U 型(xing)槽(cao)(cao)成型(xing)機(ji)安裝(zhuang)→壓頂施(shi)工(gong)→砂漿勾(gou)縫→槽(cao)(cao)內清整(zheng)。 2.施(shi)工(gong)測量(liang)控(kong)(kong)制(zhi)(zhi) 在施(shi)工(gong)測量(liang)控(kong)(kong)制(zhi)(zhi)中(zhong)(zhong)，水溝(gou)成型(xing)機(ji)哪(na)家好(hao)，軸(zhou)(zhou)線與高(gao)程(cheng)控(kong)(kong)制(zhi)(zhi)是其中(zhong)(zhong)重要部分。 軸(zhou)(zhou)線控(kong)(kong)制(zhi)(zhi)：U 型(xing)槽(cao)(cao)鋪設(she)線路(lu)布置應(ying)與設(she)計圖紙吻合(he)，在滿足設(she)計要求 情況下，其軸(zhou)(zhou)線應(ying)盡可能取直。

U型槽灌溉渠施工(gong)方法(fa)

（1）土方開挖：

由于(yu)U型槽(cao)灌溉渠(qu)開挖斷面(mian)較小(xiao)，水溝成(cheng)型機價格，擬分(fen)段(duan)在按設(she)計高程(cheng)放樣后(hou)采用(yong)人工(gong)開挖，一次性(xing)開挖到底(di)，水溝成(cheng)型機，并及時驗槽(cao)進入下一工(gong)序施工(gong)。每個(ge)施工(gong)作業(ye)段(duan)以(yi)50米左右(you)為(wei)宜。

（2）斷面土(tu)方回填(tian)：

由于灌(guan)溉渠U型槽(cao)(cao)安裝高(gao)程局部比兩(liang)側田地高(gao)，需(xu)補填土方才(cai)能進行灌(guan)渠型槽(cao)(cao)安裝。

U型(xing)槽(cao)(cao)(cao)(cao)灌溉渠工(gong)(gong)程(cheng)(cheng)施工(gong)(gong)流程(cheng)(cheng)：施工(gong)(gong)準(zhun)備→土(tu)方(fang)開挖→驗(yan)槽(cao)(cao)(cao)(cao)→斷面欠方(fang)回(hui)填土(tu)→渠道(dao)U形槽(cao)(cao)(cao)(cao)底砂(sha)(sha)墊層鋪設→訂(ding)購砼(tong)U型(xing)槽(cao)(cao)(cao)(cao)、進場(chang)檢(jian)(jian)驗(yan)→砂(sha)(sha)墊層鋪筑高程(cheng)(cheng)復核→安(an)放U型(xing)槽(cao)(cao)(cao)(cao)調整縱坡、高程(cheng)(cheng)→U型(xing)槽(cao)(cao)(cao)(cao)接縫處理(li)→壓(ya)頂砼(tong)澆筑→渠道(dao)U型(xing)槽(cao)(cao)(cao)(cao)外觀檢(jian)(jian)測、放水(shui)檢(jian)(jian)驗(yan)→交工(gong)(gong)驗(yan)收。

總之，傳統現澆砼渠(qu)道施(shi)工(gong)(gong)(gong)(gong)具有工(gong)(gong)(gong)(gong)期長、材料運輸(shu)難度大、戰線長材料浪費大、倉(cang)面多(duo)、工(gong)(gong)(gong)(gong)程(cheng)(cheng)施(shi)工(gong)(gong)(gong)(gong)流程(cheng)(cheng)復雜等特點。預(yu)制砼U型槽渠(qu)道施(shi)工(gong)(gong)(gong)(gong)具有縮(suo)短工(gong)(gong)(gong)(gong)期、材料運輸(shu)方便、材料浪費少、倉(cang)面多(duo)、工(gong)(gong)(gong)(gong)程(cheng)(cheng)施(shi)工(gong)(gong)(gong)(gong)流程(cheng)(cheng)簡單等特點，因此從施(shi)工(gong)(gong)(gong)(gong)工(gong)(gong)(gong)(gong)藝而言， 預(yu)制砼U型槽渠(qu)道更優于傳統現澆砼渠(qu)道。