鋼波紋管涵(han)沒有(you)進(jin)入(ru)設計(ji)劃定的(de)持(chi)力層,但深度知足設計(ji)值,或者(zhe)打(da)落在(zai)堅硬(ying)的(de)障礙物上(shang),影響不(bu)亂(luan)性(xing)與可靠(kao)性(xing)。同(tong)時(shi),鋼制波(bo)紋管涵(han)傾斜渡(du)過大,斷裂(lie)等現象發生,影響其承載(zai)力[1],或者(zhe)勘察講演不(bu)全面(mian),與實際情(qing)況不(bu)符合,數(shu)據資料不(bu)全面(mian),難以有(you)效指導鋼制波(bo)紋管涵(han)施工(gong),輕易(yi)引(yin)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)程(cheng)施(shi)工(gong)中(zhong),鋼(gang)制(zhi)(zhi)波(bo)紋管涵施(shi)工(gong)長短(duan)常樞紐的內容。但一些施(shi)工(gong)單位忽視(shi)采取質(zhi)量控制(zhi)(zhi)措施(shi),設(she)計(ji)不到位,導(dao)致工(gong)程(cheng)建設(she)仍舊(jiu)存在不足(zu),主(zhu)要體現在以下方面。鋼(gang)制(zhi)(zhi)波(bo)紋管涵承(cheng)載(zai)力過(guo)低表現為(wei)承(cheng)載(zai)力未能知足(zu)設(she)計(ji)規范(fan)要求,施(shi)工(gong)職員質(zhi)量控制(zhi)(zhi)意識(shi)稀薄,沒有遵循技術規范(fan)尺度開(kai)展鋼(gang)制(zhi)(zhi)波(bo)紋管涵施(shi)工(gong)。

跟(gen)著施(shi)工(gong)(gong)技(ji)術發展與提高,公(gong)路工(gong)(gong)程建(jian)(jian)設(she)數目不(bu)斷(duan)增(zeng)多,難度(du)也(ye)在加大。為(wei)確保(bao)結構穩固可(ke)靠,知足施(shi)工(gong)(gong)建(jian)(jian)設(she)需(xu)要,加強(qiang)(qiang)質(zhi)(zhi)(zhi)量(liang)控制(zhi)是十分必(bi)要的。鋼制(zhi)波紋管涵是常見的技(ji)術措(cuo)(cuo)施(shi),在工(gong)(gong)程建(jian)(jian)設(she)中得(de)到有(you)效應用。為(wei)保(bao)證施(shi)工(gong)(gong)質(zhi)(zhi)(zhi)量(liang),不(bu)僅(jin)要嚴格遵循工(gong)(gong)藝流(liu)程,落實施(shi)工(gong)(gong)技(ji)術措(cuo)(cuo)施(shi),還要加強(qiang)(qiang)質(zhi)(zhi)(zhi)量(liang)治理,建(jian)(jian)立完(wan)善的質(zhi)(zhi)(zhi)量(liang)治理軌制(zhi)。

管(guan)(guan)涵管(guan)(guan)節采用(yong)Q235-A熱軋(ya)鋼(gang)(gang)板(ban),每圈(quan)由8塊鋼(gang)(gang)板(ban)連(lian)接組成整體,再進行縱向(xiang)連(lian)接成型。連(lian)接螺栓(shuan)采用(yong)M208.8級高強度(du)(du)螺栓(shuan)及HRC35級弧(hu)形墊(dian)圈(quan),鋼(gang)(gang)板(ban)表面(mian)經由熱鍍鋅處理。管(guan)(guan)涵基礎厚度(du)(du)為(wei)120cm。洞口(kou)鋪(pu)(pu)砌(qi)及護坡采用(yong)M7.5漿砌(qi)片石(shi)鋪(pu)(pu)砌(qi)或采用(yong)鋼(gang)(gang)筋混凝土澆(jiao)筑洞口(kou)。管(guan)(guan)涵流水面(mian)坡度(du)(du)為(wei)1%~3%。

現以1-5m鋼制波紋管涵(han)(han)工(gong)(gong)(gong)程實例就鋼制波紋管涵(han)(han)工(gong)(gong)(gong)程施(shi)工(gong)(gong)(gong)工(gong)(gong)(gong)藝控制簡述如下(xia)。某(mou)高速公路(lu)因為(wei)工(gong)(gong)(gong)期較緊,考(kao)慮到(dao)原設(she)計(ji)(ji)為(wei)1-2m石拱(gong)(gong)涵(han)(han),而且(qie)其上有高達20m左右的(de)涵(han)(han)頂填(tian)土,因為(wei)石拱(gong)(gong)涵(han)(han)施(shi)工(gong)(gong)(gong)進(jin)度(du)較慢(man),為(wei)加(jia)(jia)快施(shi)工(gong)(gong)(gong)進(jin)度(du),業主部(bu)分要求將原設(she)計(ji)(ji)石拱(gong)(gong)涵(han)(han)變更設(she)計(ji)(ji)為(wei)1-5m鋼制波紋管涵(han)(han)工(gong)(gong)(gong)程涵(han)(han),以保證施(shi)工(gong)(gong)(gong)質量,加(jia)(jia)快工(gong)(gong)(gong)程建設(she)進(jin)度(du)。波紋管涵(han)(han)為(wei)直徑(jing)5m的(de)組裝波紋管,全長110m,填(tian)方(fang)高度(du)達20余米。

鋼波紋管是替(ti)換圓管涵(han)、蓋板涵(han)、拱(gong)涵(han)和小(xiao)橋的優質公路建材,該(gai)產品具(ju)(ju)有工(gong)期短、重量輕、安裝(zhuang)利便(bian)、耐久性好、工(gong)程(cheng)造(zao)價低、抗(kang)變形能力較強、減少通(tong)車后養護本錢等長處,尤其(qi)應(ying)用在(zai)高寒凍土地(di)區,軟土路基地(di)帶(dai)和深填(tian)土地(di)帶(dai)具(ju)(ju)有顯著的經(jing)濟效益。