鋼波紋管涵沒有進入設(she)(she)計(ji)劃定的持力(li)層(ceng),但深度知(zhi)足設(she)(she)計(ji)值,或(huo)者打落在堅硬(ying)的障礙物上,影(ying)響不(bu)亂(luan)性與可(ke)靠(kao)性。同時,鋼制波紋(wen)管涵傾(qing)斜渡過大,斷裂(lie)等現象發(fa)生(sheng),影(ying)響其承載力(li)[1],或(huo)者勘察(cha)講演不(bu)全面,與實際情(qing)況不(bu)符合,數據資料不(bu)全面,難以有效指導鋼制波紋(wen)管涵施工,輕易(yi)引發(fa)質量缺陷。

鋼波紋管涵承載力過低表現在哪些方面？

在公路工(gong)(gong)程(cheng)施(shi)(shi)工(gong)(gong)中,鋼(gang)制(zhi)波紋管(guan)涵(han)施(shi)(shi)工(gong)(gong)長短常樞紐的內容。但一(yi)些施(shi)(shi)工(gong)(gong)單位忽(hu)視(shi)采取(qu)質量(liang)控制(zhi)措施(shi)(shi),設計(ji)不到位,導(dao)致工(gong)(gong)程(cheng)建設仍舊存(cun)在不足(zu),主要(yao)體現(xian)在以下方面。鋼(gang)制(zhi)波紋管(guan)涵(han)承載力(li)過低(di)表現(xian)為承載力(li)未能知(zhi)足(zu)設計(ji)規范(fan)要(yao)求,施(shi)(shi)工(gong)(gong)職員質量(liang)控制(zhi)意識(shi)稀薄,沒有遵循(xun)技(ji)術規范(fan)尺(chi)度開展鋼(gang)制(zhi)波紋管(guan)涵(han)施(shi)(shi)工(gong)(gong)。

跟(gen)著施(shi)工(gong)技(ji)術發展與提高,公路工(gong)程建設(she)(she)數目不斷(duan)增多(duo),難度也在加大(da)。為確保結構穩固可靠,知足施(shi)工(gong)建設(she)(she)需要,加強(qiang)質(zhi)量(liang)(liang)(liang)控制是十分必要的(de)。鋼制波(bo)紋(wen)管(guan)涵是常見的(de)技(ji)術措(cuo)施(shi),在工(gong)程建設(she)(she)中(zhong)得到有效(xiao)應用。為保證施(shi)工(gong)質(zhi)量(liang)(liang)(liang),不僅要嚴格遵(zun)循工(gong)藝流程,落實施(shi)工(gong)技(ji)術措(cuo)施(shi),還要加強(qiang)質(zhi)量(liang)(liang)(liang)治理,建立(li)完善的(de)質(zhi)量(liang)(liang)(liang)治理軌(gui)制。

管(guan)涵(han)管(guan)節(jie)采用Q235-A熱(re)軋鋼板,每圈由(you)(you)8塊鋼板連(lian)接組成(cheng)整(zheng)體,再進(jin)行縱向連(lian)接成(cheng)型。連(lian)接螺(luo)栓采用M208.8級高強度(du)螺(luo)栓及HRC35級弧形墊圈,鋼板表(biao)面(mian)經由(you)(you)熱(re)鍍鋅(xin)處理。管(guan)涵(han)基礎厚度(du)為120cm。洞口鋪砌及護坡(po)采用M7.5漿砌片石鋪砌或采用鋼筋混(hun)凝土澆筑洞口。管(guan)涵(han)流水面(mian)坡(po)度(du)為1%~3%。

現以(yi)1-5m鋼(gang)制(zhi)(zhi)(zhi)波(bo)紋管(guan)涵(han)工(gong)(gong)(gong)(gong)程(cheng)(cheng)實例(li)就鋼(gang)制(zhi)(zhi)(zhi)波(bo)紋管(guan)涵(han)工(gong)(gong)(gong)(gong)程(cheng)(cheng)施工(gong)(gong)(gong)(gong)工(gong)(gong)(gong)(gong)藝(yi)控制(zhi)(zhi)(zhi)簡述如下。某高速公路因為工(gong)(gong)(gong)(gong)期較緊,考慮到原(yuan)設(she)計為1-2m石拱涵(han),而(er)且其上有高達20m左(zuo)右的涵(han)頂(ding)填土,因為石拱涵(han)施工(gong)(gong)(gong)(gong)進度(du)較慢,為加快(kuai)施工(gong)(gong)(gong)(gong)進度(du),業主部分要求將原(yuan)設(she)計石拱涵(han)變更設(she)計為1-5m鋼(gang)制(zhi)(zhi)(zhi)波(bo)紋管(guan)涵(han)工(gong)(gong)(gong)(gong)程(cheng)(cheng)涵(han),以(yi)保證施工(gong)(gong)(gong)(gong)質(zhi)量,加快(kuai)工(gong)(gong)(gong)(gong)程(cheng)(cheng)建設(she)進度(du)。波(bo)紋管(guan)涵(han)為直徑(jing)5m的組裝波(bo)紋管(guan),全(quan)長110m,填方(fang)高度(du)達20余米。

鋼波紋管是替(ti)換(huan)圓管涵(han)、蓋(gai)板涵(han)、拱涵(han)和小(xiao)橋的(de)優質公路(lu)建材,該產品具(ju)有工期短(duan)、重量輕(qing)、安裝利便、耐(nai)久性(xing)好、工程(cheng)造價(jia)低(di)、抗變形能力(li)較(jiao)強、減少通(tong)車后(hou)養護本錢等長處,尤其應用在高(gao)寒凍土地區,軟(ruan)土路(lu)基地帶和深填土地帶具(ju)有顯著的(de)經濟效益。