鋼波紋管涵沒有進入設計劃定(ding)的持力層,但深(shen)度知(zhi)足設計值(zhi),或者打落在(zai)堅硬的障礙物上,影響(xiang)不亂性(xing)與可靠(kao)性(xing)。同(tong)時,鋼(gang)制波(bo)紋管涵傾斜(xie)渡(du)過大,斷裂等現象(xiang)發生,影響(xiang)其承載力[1],或者勘(kan)察講演不全(quan)面(mian),與實際情(qing)況不符合,數據(ju)資料不全(quan)面(mian),難以有效指(zhi)導(dao)鋼(gang)制波(bo)紋管涵施工,輕易引發質量(liang)缺(que)陷。

鋼波紋管涵承載力過低表現在哪些方面？

在公(gong)路工(gong)程(cheng)施(shi)工(gong)中,鋼制(zhi)(zhi)波紋管(guan)涵(han)施(shi)工(gong)長短常樞(shu)紐的內容。但一些(xie)施(shi)工(gong)單位忽視采取質量控(kong)制(zhi)(zhi)措(cuo)施(shi),設(she)計不到位,導致工(gong)程(cheng)建設(she)仍舊存在不足(zu),主要(yao)體現(xian)在以下方面。鋼制(zhi)(zhi)波紋管(guan)涵(han)承載(zai)力過低表現(xian)為(wei)承載(zai)力未(wei)能知足(zu)設(she)計規范要(yao)求,施(shi)工(gong)職員質量控(kong)制(zhi)(zhi)意識稀(xi)薄,沒有遵循技術規范尺(chi)度(du)開展鋼制(zhi)(zhi)波紋管(guan)涵(han)施(shi)工(gong)。

跟著(zhu)施(shi)工(gong)技術發展與提高(gao),公路工(gong)程(cheng)建(jian)設數目不斷增多,難(nan)度(du)也在加大。為確保結構穩固可靠,知足施(shi)工(gong)建(jian)設需要(yao),加強質量控制(zhi)是十(shi)分(fen)必要(yao)的(de)。鋼制(zhi)波(bo)紋管涵是常見的(de)技術措(cuo)施(shi),在工(gong)程(cheng)建(jian)設中得到(dao)有效應用(yong)。為保證施(shi)工(gong)質量,不僅要(yao)嚴格遵(zun)循工(gong)藝流程(cheng),落實施(shi)工(gong)技術措(cuo)施(shi),還要(yao)加強質量治(zhi)理,建(jian)立完善的(de)質量治(zhi)理軌制(zhi)。

管涵管節(jie)采用Q235-A熱軋鋼板(ban),每圈由8塊(kuai)鋼板(ban)連接(jie)組成整體,再進行縱(zong)向連接(jie)成型。連接(jie)螺(luo)栓(shuan)采用M208.8級高強度螺(luo)栓(shuan)及HRC35級弧形墊圈,鋼板(ban)表面(mian)經由熱鍍鋅處理。管涵基礎厚度為120cm。洞口鋪砌(qi)(qi)及護坡采用M7.5漿砌(qi)(qi)片(pian)石鋪砌(qi)(qi)或采用鋼筋(jin)混凝(ning)土澆筑洞口。管涵流水面(mian)坡度為1%~3%。

現以1-5m鋼(gang)制(zhi)波紋(wen)管(guan)涵(han)工(gong)(gong)(gong)程(cheng)實例就鋼(gang)制(zhi)波紋(wen)管(guan)涵(han)工(gong)(gong)(gong)程(cheng)施工(gong)(gong)(gong)工(gong)(gong)(gong)藝控(kong)制(zhi)簡述如下。某高(gao)速(su)公路因(yin)(yin)為(wei)(wei)(wei)工(gong)(gong)(gong)期較(jiao)緊,考慮到原設(she)計(ji)為(wei)(wei)(wei)1-2m石拱涵(han),而且其上(shang)有高(gao)達(da)20m左右(you)的涵(han)頂填土,因(yin)(yin)為(wei)(wei)(wei)石拱涵(han)施工(gong)(gong)(gong)進(jin)度(du)較(jiao)慢,為(wei)(wei)(wei)加快施工(gong)(gong)(gong)進(jin)度(du),業主部分要(yao)求(qiu)將原設(she)計(ji)石拱涵(han)變更設(she)計(ji)為(wei)(wei)(wei)1-5m鋼(gang)制(zhi)波紋(wen)管(guan)涵(han)工(gong)(gong)(gong)程(cheng)涵(han),以保證施工(gong)(gong)(gong)質量,加快工(gong)(gong)(gong)程(cheng)建(jian)設(she)進(jin)度(du)。波紋(wen)管(guan)涵(han)為(wei)(wei)(wei)直徑5m的組裝(zhuang)波紋(wen)管(guan),全長110m,填方高(gao)度(du)達(da)20余(yu)米。

鋼波紋管是替(ti)換圓管涵、蓋板涵、拱涵和小橋的(de)優質公路建材,該產品具有(you)工(gong)期(qi)短(duan)、重量輕、安裝利(li)便、耐久性好、工(gong)程(cheng)造(zao)價低、抗變(bian)形能力(li)較(jiao)強、減(jian)少通(tong)車后養護本錢等(deng)長處,尤其應(ying)用在(zai)高寒凍(dong)土(tu)(tu)地區,軟土(tu)(tu)路基地帶(dai)和深填(tian)土(tu)(tu)地帶(dai)具有(you)顯著的(de)經(jing)濟(ji)效(xiao)益。