鋼波紋管涵沒有(you)進入設(she)計劃定的持力(li)層,但深(shen)度知足設(she)計值,或者打落在堅硬的障礙(ai)物上(shang),影響不(bu)亂性與可靠性。同時,鋼制波紋管(guan)涵傾斜渡過大,斷(duan)裂等現象(xiang)發(fa)生,影響其承載力(li)[1],或者勘察講(jiang)演不(bu)全面,與實(shi)際情況不(bu)符合(he),數據資料不(bu)全面,難(nan)以有(you)效指(zhi)導鋼制波紋管(guan)涵施(shi)工,輕易引發(fa)質量缺陷(xian)。

鋼波紋管涵承載力過低表現在哪些方面？

在公(gong)路工(gong)(gong)(gong)程施(shi)(shi)工(gong)(gong)(gong)中,鋼(gang)制波紋管涵施(shi)(shi)工(gong)(gong)(gong)長(chang)短常樞紐的內(nei)容(rong)。但(dan)一些施(shi)(shi)工(gong)(gong)(gong)單位忽視(shi)采取(qu)質量控(kong)制措施(shi)(shi),設計不到(dao)位,導(dao)致工(gong)(gong)(gong)程建設仍舊存在不足,主要(yao)體現在以下(xia)方面。鋼(gang)制波紋管涵承載力(li)過低(di)表現為承載力(li)未能知足設計規范(fan)要(yao)求,施(shi)(shi)工(gong)(gong)(gong)職(zhi)員質量控(kong)制意識稀(xi)薄(bo),沒有(you)遵循(xun)技(ji)術規范(fan)尺(chi)度(du)開展鋼(gang)制波紋管涵施(shi)(shi)工(gong)(gong)(gong)。

跟著施(shi)(shi)(shi)工(gong)技術(shu)發(fa)展與提高(gao),公路工(gong)程(cheng)(cheng)建設(she)數目(mu)不斷(duan)增(zeng)多,難度也在(zai)加大(da)。為確保(bao)(bao)結構穩固可靠,知足施(shi)(shi)(shi)工(gong)建設(she)需要(yao)(yao),加強質量控制(zhi)是(shi)十(shi)分必要(yao)(yao)的。鋼制(zhi)波紋(wen)管涵是(shi)常見的技術(shu)措施(shi)(shi)(shi),在(zai)工(gong)程(cheng)(cheng)建設(she)中(zhong)得到有效應用。為保(bao)(bao)證施(shi)(shi)(shi)工(gong)質量,不僅要(yao)(yao)嚴格(ge)遵循工(gong)藝(yi)流程(cheng)(cheng),落實(shi)施(shi)(shi)(shi)工(gong)技術(shu)措施(shi)(shi)(shi),還要(yao)(yao)加強質量治理(li),建立完善的質量治理(li)軌制(zhi)。

管(guan)涵管(guan)節(jie)采(cai)(cai)用(yong)Q235-A熱(re)(re)軋鋼(gang)板,每(mei)圈(quan)(quan)由8塊鋼(gang)板連接組成整體(ti),再進行縱向連接成型。連接螺栓采(cai)(cai)用(yong)M208.8級高強度螺栓及(ji)HRC35級弧形(xing)墊(dian)圈(quan)(quan),鋼(gang)板表面經由熱(re)(re)鍍鋅處(chu)理。管(guan)涵基礎厚(hou)度為(wei)120cm。洞口鋪砌(qi)及(ji)護坡(po)(po)采(cai)(cai)用(yong)M7.5漿(jiang)砌(qi)片石鋪砌(qi)或采(cai)(cai)用(yong)鋼(gang)筋混凝土澆(jiao)筑(zhu)洞口。管(guan)涵流水面坡(po)(po)度為(wei)1%~3%。

現以(yi)1-5m鋼(gang)制(zhi)波(bo)紋管(guan)涵(han)工(gong)程(cheng)實例就鋼(gang)制(zhi)波(bo)紋管(guan)涵(han)工(gong)程(cheng)施工(gong)工(gong)藝控制(zhi)簡(jian)述(shu)如下(xia)。某高(gao)速公路因為(wei)(wei)工(gong)期較緊,考慮到原設計為(wei)(wei)1-2m石拱(gong)涵(han),而(er)且其上有(you)高(gao)達(da)20m左右(you)的涵(han)頂填(tian)(tian)土(tu),因為(wei)(wei)石拱(gong)涵(han)施工(gong)進度(du)較慢,為(wei)(wei)加(jia)快施工(gong)進度(du),業主部分(fen)要(yao)求將原設計石拱(gong)涵(han)變(bian)更設計為(wei)(wei)1-5m鋼(gang)制(zhi)波(bo)紋管(guan)涵(han)工(gong)程(cheng)涵(han),以(yi)保證施工(gong)質量,加(jia)快工(gong)程(cheng)建設進度(du)。波(bo)紋管(guan)涵(han)為(wei)(wei)直徑5m的組裝波(bo)紋管(guan),全長110m,填(tian)(tian)方(fang)高(gao)度(du)達(da)20余米(mi)。

鋼波紋管是(shi)替換圓(yuan)管涵(han)、蓋板(ban)涵(han)、拱涵(han)和小橋的(de)(de)優(you)質公路建材,該產(chan)品具(ju)(ju)有(you)(you)工期短、重(zhong)量輕、安裝利便、耐久性好、工程造價(jia)低、抗變形能力較強、減少通車后養護本錢等長處,尤其(qi)應(ying)用在高(gao)寒凍土(tu)地(di)(di)區,軟土(tu)路基地(di)(di)帶(dai)(dai)和深(shen)填土(tu)地(di)(di)帶(dai)(dai)具(ju)(ju)有(you)(you)顯著的(de)(de)經濟效益(yi)。