鋼波紋管涵(han)沒有進入設計劃定的(de)持力(li)層,但深度(du)知(zhi)足(zu)設計值,或者(zhe)打落在堅(jian)硬的(de)障(zhang)礙物上,影(ying)響不亂(luan)性與可靠性。同時,鋼制波紋管涵(han)傾斜渡過大(da),斷裂等現象發生,影(ying)響其承載力(li)[1],或者(zhe)勘察講演(yan)不全(quan)面(mian),與實際情(qing)況不符合,數(shu)據資(zi)料不全(quan)面(mian),難(nan)以有效指導鋼制波紋管涵(han)施(shi)工,輕易引發質量缺陷。

鋼波紋管涵承載力過低表現在哪些方面？

在公路(lu)工(gong)(gong)程施(shi)(shi)(shi)工(gong)(gong)中(zhong),鋼(gang)制(zhi)(zhi)波紋管涵施(shi)(shi)(shi)工(gong)(gong)長短常樞(shu)紐的內(nei)容(rong)。但一(yi)些(xie)施(shi)(shi)(shi)工(gong)(gong)單位忽視(shi)采取質量控制(zhi)(zhi)措施(shi)(shi)(shi),設(she)計(ji)不(bu)到位,導(dao)致工(gong)(gong)程建設(she)仍舊存在不(bu)足(zu),主(zhu)要(yao)體現在以下方面。鋼(gang)制(zhi)(zhi)波紋管涵承載(zai)力(li)過低表現為承載(zai)力(li)未(wei)能知足(zu)設(she)計(ji)規范要(yao)求,施(shi)(shi)(shi)工(gong)(gong)職員(yuan)質量控制(zhi)(zhi)意識稀薄,沒有遵循(xun)技(ji)術規范尺度開展(zhan)鋼(gang)制(zhi)(zhi)波紋管涵施(shi)(shi)(shi)工(gong)(gong)。

跟著(zhu)施(shi)工(gong)技(ji)(ji)術發展與提高,公路(lu)工(gong)程建(jian)設(she)數(shu)目不斷增多,難度也(ye)在加大。為確(que)保(bao)結構穩固可靠,知足施(shi)工(gong)建(jian)設(she)需要,加強質(zhi)量(liang)控制是(shi)十分必要的(de)。鋼制波紋管涵是(shi)常見的(de)技(ji)(ji)術措施(shi),在工(gong)程建(jian)設(she)中得到有效應(ying)用。為保(bao)證施(shi)工(gong)質(zhi)量(liang),不僅要嚴格遵循工(gong)藝流(liu)程,落(luo)實施(shi)工(gong)技(ji)(ji)術措施(shi),還(huan)要加強質(zhi)量(liang)治理,建(jian)立(li)完(wan)善的(de)質(zhi)量(liang)治理軌制。

管(guan)(guan)涵管(guan)(guan)節(jie)采用Q235-A熱軋(ya)鋼(gang)板,每圈由8塊鋼(gang)板連(lian)接組成整(zheng)體(ti),再進行縱向(xiang)連(lian)接成型。連(lian)接螺(luo)栓采用M208.8級高(gao)強度螺(luo)栓及(ji)HRC35級弧形墊圈,鋼(gang)板表面經由熱鍍鋅(xin)處理。管(guan)(guan)涵基礎厚度為(wei)120cm。洞口(kou)鋪砌(qi)及(ji)護(hu)坡采用M7.5漿砌(qi)片石鋪砌(qi)或采用鋼(gang)筋混凝土澆筑洞口(kou)。管(guan)(guan)涵流水面坡度為(wei)1%~3%。

現以1-5m鋼制(zhi)波(bo)紋(wen)(wen)管(guan)涵(han)工(gong)(gong)(gong)(gong)程(cheng)(cheng)(cheng)實例(li)就鋼制(zhi)波(bo)紋(wen)(wen)管(guan)涵(han)工(gong)(gong)(gong)(gong)程(cheng)(cheng)(cheng)施工(gong)(gong)(gong)(gong)工(gong)(gong)(gong)(gong)藝(yi)控制(zhi)簡述(shu)如下。某(mou)高(gao)速(su)公路因為工(gong)(gong)(gong)(gong)期較(jiao)緊,考(kao)慮到原(yuan)(yuan)設計為1-2m石拱涵(han),而且其上(shang)有高(gao)達(da)20m左右的涵(han)頂填土,因為石拱涵(han)施工(gong)(gong)(gong)(gong)進(jin)(jin)度(du)(du)較(jiao)慢,為加快施工(gong)(gong)(gong)(gong)進(jin)(jin)度(du)(du),業(ye)主部(bu)分要求將原(yuan)(yuan)設計石拱涵(han)變更(geng)設計為1-5m鋼制(zhi)波(bo)紋(wen)(wen)管(guan)涵(han)工(gong)(gong)(gong)(gong)程(cheng)(cheng)(cheng)涵(han),以保(bao)證施工(gong)(gong)(gong)(gong)質(zhi)量,加快工(gong)(gong)(gong)(gong)程(cheng)(cheng)(cheng)建設進(jin)(jin)度(du)(du)。波(bo)紋(wen)(wen)管(guan)涵(han)為直徑(jing)5m的組裝波(bo)紋(wen)(wen)管(guan),全長110m,填方高(gao)度(du)(du)達(da)20余(yu)米(mi)。

鋼波紋管是(shi)替(ti)換(huan)圓管涵(han)、蓋板(ban)涵(han)、拱涵(han)和小(xiao)橋(qiao)的優質公路建材,該產品具(ju)(ju)有工(gong)期短、重量輕、安裝利便、耐久性好、工(gong)程造價低、抗(kang)變形能力較強、減少通車后養護本錢(qian)等長(chang)處,尤其應用在高寒凍土(tu)(tu)地區,軟土(tu)(tu)路基地帶(dai)和深填土(tu)(tu)地帶(dai)具(ju)(ju)有顯著的經濟(ji)效益。