鋼波紋管涵沒有進入(ru)設計劃定的持(chi)力層,但(dan)深度(du)知足設計值,或(huo)者(zhe)打(da)落在堅硬的障礙物(wu)上,影(ying)響不(bu)亂性與可靠性。同時,鋼制波(bo)紋管涵傾斜渡過大,斷(duan)裂等現象發生(sheng),影(ying)響其承載力[1],或(huo)者(zhe)勘察(cha)講演不(bu)全(quan)(quan)面(mian),與實際情況不(bu)符合,數據資(zi)料不(bu)全(quan)(quan)面(mian),難(nan)以有效(xiao)指(zhi)導鋼制波(bo)紋管涵施(shi)工,輕易引發質量缺(que)陷。

鋼波紋管涵承載力過低表現在哪些方面？

在(zai)公(gong)路工(gong)程(cheng)施(shi)(shi)工(gong)中,鋼(gang)制(zhi)波紋管涵(han)施(shi)(shi)工(gong)長短常樞(shu)紐的內容(rong)。但一些施(shi)(shi)工(gong)單位(wei)忽視采取質(zhi)量控制(zhi)措施(shi)(shi),設計(ji)不(bu)(bu)到(dao)位(wei),導致工(gong)程(cheng)建(jian)設仍(reng)舊存(cun)在(zai)不(bu)(bu)足,主(zhu)要體現在(zai)以下方面。鋼(gang)制(zhi)波紋管涵(han)承(cheng)載力過低表現為承(cheng)載力未能知足設計(ji)規(gui)范(fan)要求,施(shi)(shi)工(gong)職員質(zhi)量控制(zhi)意(yi)識稀(xi)薄,沒有遵(zun)循技術規(gui)范(fan)尺(chi)度開展鋼(gang)制(zhi)波紋管涵(han)施(shi)(shi)工(gong)。

跟著(zhu)施(shi)工(gong)(gong)技(ji)(ji)術發展(zhan)與提高,公(gong)路(lu)工(gong)(gong)程建設數目不(bu)斷(duan)增(zeng)多,難度也在加(jia)(jia)大。為確(que)保(bao)結構(gou)穩固可(ke)靠,知足施(shi)工(gong)(gong)建設需要,加(jia)(jia)強(qiang)質量(liang)(liang)(liang)控制(zhi)是(shi)十分必要的(de)。鋼制(zhi)波(bo)紋(wen)管涵(han)是(shi)常(chang)見的(de)技(ji)(ji)術措施(shi),在工(gong)(gong)程建設中(zhong)得到有效應(ying)用。為保(bao)證(zheng)施(shi)工(gong)(gong)質量(liang)(liang)(liang),不(bu)僅(jin)要嚴格遵循工(gong)(gong)藝流程,落實施(shi)工(gong)(gong)技(ji)(ji)術措施(shi),還要加(jia)(jia)強(qiang)質量(liang)(liang)(liang)治理,建立完(wan)善的(de)質量(liang)(liang)(liang)治理軌(gui)制(zhi)。

管(guan)涵管(guan)節采(cai)用(yong)Q235-A熱(re)軋鋼板(ban),每圈(quan)由(you)8塊鋼板(ban)連(lian)接組成(cheng)整體(ti),再進行縱向連(lian)接成(cheng)型(xing)。連(lian)接螺栓(shuan)采(cai)用(yong)M208.8級高強(qiang)度(du)螺栓(shuan)及HRC35級弧(hu)形墊(dian)圈(quan),鋼板(ban)表面(mian)經由(you)熱(re)鍍鋅處理(li)。管(guan)涵基礎厚(hou)度(du)為120cm。洞口(kou)鋪砌及護坡(po)采(cai)用(yong)M7.5漿砌片石(shi)鋪砌或采(cai)用(yong)鋼筋混凝土澆筑洞口(kou)。管(guan)涵流水(shui)面(mian)坡(po)度(du)為1%~3%。

現以1-5m鋼制(zhi)波(bo)紋(wen)(wen)管涵(han)(han)(han)工(gong)(gong)(gong)程(cheng)實例就鋼制(zhi)波(bo)紋(wen)(wen)管涵(han)(han)(han)工(gong)(gong)(gong)程(cheng)施(shi)工(gong)(gong)(gong)工(gong)(gong)(gong)藝控制(zhi)簡述如下。某高速公路因(yin)(yin)為(wei)(wei)(wei)工(gong)(gong)(gong)期較緊,考慮到(dao)原(yuan)設(she)計(ji)為(wei)(wei)(wei)1-2m石拱(gong)(gong)涵(han)(han)(han),而且其上有高達(da)20m左右的涵(han)(han)(han)頂填土,因(yin)(yin)為(wei)(wei)(wei)石拱(gong)(gong)涵(han)(han)(han)施(shi)工(gong)(gong)(gong)進(jin)度(du)較慢,為(wei)(wei)(wei)加快(kuai)施(shi)工(gong)(gong)(gong)進(jin)度(du),業主部分要求(qiu)將原(yuan)設(she)計(ji)石拱(gong)(gong)涵(han)(han)(han)變(bian)更設(she)計(ji)為(wei)(wei)(wei)1-5m鋼制(zhi)波(bo)紋(wen)(wen)管涵(han)(han)(han)工(gong)(gong)(gong)程(cheng)涵(han)(han)(han),以保證施(shi)工(gong)(gong)(gong)質量,加快(kuai)工(gong)(gong)(gong)程(cheng)建設(she)進(jin)度(du)。波(bo)紋(wen)(wen)管涵(han)(han)(han)為(wei)(wei)(wei)直徑5m的組裝波(bo)紋(wen)(wen)管,全長110m,填方高度(du)達(da)20余米。

鋼波紋管是替換圓管(guan)涵、蓋板涵、拱涵和(he)小橋的優質公路建材,該產品具有工期(qi)短、重量輕、安裝利便、耐久性(xing)好、工程造價低、抗(kang)變形能力較(jiao)強、減少通(tong)車后(hou)養護本錢等(deng)長(chang)處,尤其(qi)應用在高寒凍土(tu)(tu)地(di)區,軟(ruan)土(tu)(tu)路基地(di)帶(dai)和(he)深(shen)填土(tu)(tu)地(di)帶(dai)具有顯著的經濟效(xiao)益。