鋼波紋管涵(han)沒有進入設(she)計劃定(ding)的持力層,但深度知足設(she)計值,或(huo)(huo)者打落在堅硬的障(zhang)礙物上,影響不亂性與可靠性。同(tong)時(shi),鋼制波紋管涵(han)傾斜渡(du)過大,斷裂等現象發生(sheng),影響其(qi)承載力[1],或(huo)(huo)者勘察講演不全(quan)面(mian),與實(shi)際情況不符合,數據資料不全(quan)面(mian),難(nan)以有效指導(dao)鋼制波紋管涵(han)施工,輕易引發質(zhi)量(liang)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)(gong)(gong)(gong)程施(shi)(shi)工(gong)(gong)(gong)(gong)(gong)中,鋼制(zhi)波(bo)紋管涵施(shi)(shi)工(gong)(gong)(gong)(gong)(gong)長(chang)短常(chang)樞(shu)紐的內容。但一些施(shi)(shi)工(gong)(gong)(gong)(gong)(gong)單位(wei)忽視采取(qu)質(zhi)量控制(zhi)措施(shi)(shi),設計不(bu)到位(wei),導致工(gong)(gong)(gong)(gong)(gong)程建(jian)設仍(reng)舊存在不(bu)足(zu)(zu),主要體現在以下方(fang)面。鋼制(zhi)波(bo)紋管涵承載力(li)過低表現為(wei)承載力(li)未能知(zhi)足(zu)(zu)設計規范要求,施(shi)(shi)工(gong)(gong)(gong)(gong)(gong)職員(yuan)質(zhi)量控制(zhi)意識稀薄,沒有(you)遵循技術規范尺度開展(zhan)鋼制(zhi)波(bo)紋管涵施(shi)(shi)工(gong)(gong)(gong)(gong)(gong)。

跟著施工(gong)技(ji)(ji)(ji)術(shu)發展與(yu)提高,公(gong)路(lu)工(gong)程建設(she)數目不(bu)斷(duan)增多,難度也(ye)在(zai)加大。為確保結構(gou)穩固可靠,知足施工(gong)建設(she)需要(yao),加強質(zhi)量(liang)控制是十分必要(yao)的(de)(de)(de)。鋼制波紋管(guan)涵是常見的(de)(de)(de)技(ji)(ji)(ji)術(shu)措施,在(zai)工(gong)程建設(she)中得到(dao)有效應用。為保證(zheng)施工(gong)質(zhi)量(liang),不(bu)僅要(yao)嚴(yan)格遵循工(gong)藝(yi)流程,落實施工(gong)技(ji)(ji)(ji)術(shu)措施,還要(yao)加強質(zhi)量(liang)治理,建立完善的(de)(de)(de)質(zhi)量(liang)治理軌制。

管(guan)涵管(guan)節采(cai)用Q235-A熱軋鋼(gang)(gang)板,每圈由8塊鋼(gang)(gang)板連接組(zu)成整(zheng)體,再(zai)進行縱(zong)向連接成型。連接螺栓采(cai)用M208.8級高強度螺栓及(ji)HRC35級弧形墊圈,鋼(gang)(gang)板表面經(jing)由熱鍍鋅(xin)處理。管(guan)涵基(ji)礎厚度為(wei)120cm。洞口(kou)鋪砌(qi)及(ji)護坡采(cai)用M7.5漿砌(qi)片石鋪砌(qi)或采(cai)用鋼(gang)(gang)筋混(hun)凝土澆(jiao)筑洞口(kou)。管(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)(guan)涵(han)(han)工程(cheng)實例就鋼制(zhi)波(bo)紋(wen)(wen)管(guan)(guan)涵(han)(han)工程(cheng)施工工藝控制(zhi)簡述如下。某高速(su)公路因(yin)(yin)為(wei)工期較緊,考慮到原設(she)計(ji)為(wei)1-2m石拱(gong)涵(han)(han),而且其上有(you)高達20m左右的涵(han)(han)頂填(tian)(tian)土,因(yin)(yin)為(wei)石拱(gong)涵(han)(han)施工進度(du)較慢,為(wei)加(jia)快(kuai)施工進度(du),業(ye)主部分(fen)要求將原設(she)計(ji)石拱(gong)涵(han)(han)變更設(she)計(ji)為(wei)1-5m鋼制(zhi)波(bo)紋(wen)(wen)管(guan)(guan)涵(han)(han)工程(cheng)涵(han)(han),以保證施工質(zhi)量,加(jia)快(kuai)工程(cheng)建設(she)進度(du)。波(bo)紋(wen)(wen)管(guan)(guan)涵(han)(han)為(wei)直徑(jing)5m的組裝波(bo)紋(wen)(wen)管(guan)(guan),全長110m,填(tian)(tian)方(fang)高度(du)達20余米(mi)。

鋼波紋管是替換圓(yuan)管涵(han)、蓋板涵(han)、拱涵(han)和(he)小(xiao)橋的優(you)質(zhi)公路(lu)建(jian)材,該產品具(ju)有工期(qi)短、重量輕、安裝利便、耐久性好、工程(cheng)造價低、抗變形(xing)能(neng)力較強(qiang)、減少通(tong)車后養護(hu)本錢(qian)等長處,尤其應(ying)用在高寒凍(dong)土地區,軟土路(lu)基地帶和(he)深填(tian)土地帶具(ju)有顯著的經濟效益(yi)。