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衡水浩威新材料(liao)有限(xian)公(gong)司(si)主營產品:鋼波(bo)紋管、鋼波(bo)紋涵管

遂寧南方南!南方高填土鋼波紋涵管設計經驗無償奉送

瀏覽:22587 發布日期:2018-12-22

南方南!南方高填土鋼波紋涵管設計經(jing)驗(yan)無償(chang)奉送!衡水浩(hao)威新材料有限公司產品出廠(chang)合格率(lv)高,過(guo)硬的技術是我們自信(xin)的資本,7X24完善的售后服務,使市(shi)場占有率(lv)逐年攀升。

首先(xian)說,南方地區(qu)雨(yu)水充沛,地下(xia)水豐富,軟土分(fen)布,做好涵洞基(ji)(ji)(ji)礎(chu)及臺背回(hui)填對于(yu)鋼(gang)(gang)波(bo)紋(wen)(wen)涵管整體穩定及防水尤(you)為(wei)重要。地基(ji)(ji)(ji)要對整個(ge)鋼(gang)(gang)波(bo)紋(wen)(wen)涵管保持(chi)均勻的(de)(de)承載力,要避免(mian)軟弱基(ji)(ji)(ji)和巖基(ji)(ji)(ji)交(jiao)叉的(de)(de)地基(ji)(ji)(ji),如果(guo)不可(ke)避免(mian)軟弱地基(ji)(ji)(ji),要用(yong)優質砂石(shi)及礫石(shi)壓(ya)實(shi)成(cheng)型(xing),盡量(liang)減少整個(ge)區(qu)間(jian)的(de)(de)變(bian)位量(liang)。基(ji)(ji)(ji)礎(chu)厚度從鋼(gang)(gang)波(bo)紋(wen)(wen)涵管的(de)(de)底部算起以(yi)80cm左右為(wei)宜,用(yong)透水性好、粒度分(fen)布良好的(de)(de)砂礫或(huo)碎石(shi)成(cheng)型(xing)。材(cai)料的(de)(de)更大(da)粒徑(jing)不得超(chao)過(guo)波(bo)長的(de)(de)1/2。鋼(gang)(gang)波(bo)紋(wen)(wen)涵管臺背宜采(cai)用(yong)砂礫或(huo)碎石(shi)進行回(hui)填,兩側回(hui)填應同時進行,壓(ya)實(shi)落(luo)差應小于(yu)20cm。因偏壓(ya)造成(cheng)鋼(gang)(gang)波(bo)紋(wen)(wen)涵管變(bian)形(xing)時,應修正截面變(bian)形(xing)后(hou)重新壓(ya)實(shi)。

南方高填土鋼波紋涵管設計經驗無償奉送

然后(hou)說,加(jia)(jia)(jia)(jia)強防(fang)腐防(fang)沖(chong)刷(shua)(shua)設(she)(she)計。南方(fang)地(di)區地(di)下(xia)水多帶有不同(tong)程度(du)(du)(du)的(de)(de)(de)腐蝕性,同(tong)時山(shan)嶺(ling)重(zhong)(zhong)(zhong)丘地(di)區地(di)表水流(liu)湍急,季(ji)節(jie)性降雨沖(chong)刷(shua)(shua)嚴重(zhong)(zhong)(zhong)。因此,鋼波紋(wen)涵(han)管(guan)(guan)的(de)(de)(de)防(fang)腐及(ji)防(fang)沖(chong)刷(shua)(shua)設(she)(she)計應重(zhong)(zhong)(zhong)點考慮(lv)。在涵(han)洞(dong)(dong)(dong)內(nei)外(wai)壁熱鍍鋅(xin)層(ceng)嚴格按照相(xiang)關標(biao)準控(kong)制的(de)(de)(de)基(ji)礎上,可(ke)采用如(ru)下(xia)措(cuo)施(shi)加(jia)(jia)(jia)(jia)強涵(han)洞(dong)(dong)(dong)的(de)(de)(de)防(fang)腐及(ji)防(fang)沖(chong)刷(shua)(shua)能(neng)力(li)(li):1)對(dui)腐蝕及(ji)沖(chong)刷(shua)(shua)不嚴重(zhong)(zhong)(zhong)的(de)(de)(de)場合(he),可(ke)在鋼波紋(wen)管(guan)(guan)內(nei)外(wai)壁增(zeng)加(jia)(jia)(jia)(jia)熱涂瀝(li)青(qing)層(ceng)2道(dao),每道(dao)厚(hou)約1.5mm,瀝(li)青(qing)涂抹(mo)需(xu)在回填之前進行。該措(cuo)施(shi)也(ye)可(ke)增(zeng)強涵(han)洞(dong)(dong)(dong)的(de)(de)(de)防(fang)水功(gong)能(neng)。2)對(dui)腐蝕及(ji)沖(chong)刷(shua)(shua)較為(wei)嚴重(zhong)(zhong)(zhong)的(de)(de)(de)場合(he),除在外(wai)壁增(zeng)加(jia)(jia)(jia)(jia)2道(dao)熱涂瀝(li)青(qing)層(ceng)外(wai),可(ke)考慮(lv)在管(guan)(guan)內(nei)壁包裹一(yi)層(ceng) C25細石(shi)(shi)(shi)(shi)砼(tong),更能(neng)加(jia)(jia)(jia)(jia)強涵(han)洞(dong)(dong)(dong)受水流(liu)沖(chong)刷(shua)(shua)的(de)(de)(de)能(neng)力(li)(li),確保(bao)對(dui)涵(han)管(guan)(guan)管(guan)(guan)壁的(de)(de)(de)保(bao)護。C25細石(shi)(shi)(shi)(shi)砼(tong)體積配合(he)比為(wei)水泥∶砂子(zi)∶ 石(shi)(shi)(shi)(shi)子(zi)=1∶1.16∶2.93,加(jia)(jia)(jia)(jia)水混合(he)均勻后(hou)澆(jiao)筑(zhu)在管(guan)(guan)內(nei)壁一(yi)定高(gao)度(du)(du)(du)的(de)(de)(de)圓(yuan)弧內(nei),澆(jiao)筑(zhu)厚(hou)度(du)(du)(du)為(wei)高(gao)出(chu)波峰3cm,抹(mo)平即可(ke)。細石(shi)(shi)(shi)(shi)砼(tong)粘(zhan)附力(li)(li)很強,能(neng)滿足水流(liu)及(ji)砂石(shi)(shi)(shi)(shi)的(de)(de)(de)沖(chong)刷(shua)(shua)要(yao)(yao)求(qiu)。此外(wai),也(ye)可(ke)考慮(lv)管(guan)(guan)身內(nei)壁鋪設(she)(she)復合(he)水泥砂漿鋼絲(si)網保(bao)護層(ceng)的(de)(de)(de)做法,要(yao)(yao)求(qiu)小厚(hou)度(du)(du)(du)不小于5cm。但此法施(shi)工(gong)較為(wei)困難,不推(tui)薦(jian)采用。

再者說,鋼(gang)(gang)波紋(wen)涵(han)管(guan)(guan)采(cai)用(yong)(yong)工(gong)廠(chang)標(biao)準(zhun)化生(sheng)產(chan)(chan),通常涵(han)頂填(tian)土高(gao)度(du)(du)與(yu)(yu)鋼(gang)(gang)管(guan)(guan)厚度(du)(du)、波高(gao)等參數(shu)規(gui)格(ge)(ge)有明確(que)的對應關系。而山(shan)區高(gao)速公路涵(han)洞(dong)(dong)較長,如(ru)(ru)果某(mou)一(yi)座涵(han)洞(dong)(dong)涵(han)頂填(tian)土高(gao)度(du)(du)位(wei)于兩種涵(han)洞(dong)(dong)規(gui)格(ge)(ge)臨界處,則采(cai)用(yong)(yong)高(gao)或(huo)低(di)標(biao)準(zhun)生(sheng)產(chan)(chan)通常會(hui)有幾十萬元的價格(ge)(ge)差別。在(zai)(zai)這種情況下(xia),建(jian)議(yi)在(zai)(zai)低(di)標(biao)準(zhun)的基礎(chu)上采(cai)用(yong)(yong)局部(bu)(bu)增(zeng)設加(jia)強肋的做法(fa)以(yi)達到既能保(bao)證波紋(wen)管(guan)(guan)涵(han)在(zai)(zai)施工(gong)過程及后期運營的安全(quan)要求,又節約(yue)造價的目的。具(ju)體做法(fa)如(ru)(ru)圖(tu)(tu)3所示,在(zai)(zai)管(guan)(guan)頂填(tian)高(gao)超過(H-3)m范圍(wei)內的管(guan)(guan)身(shen)頂部(bu)(bu)設置(zhi)加(jia)強肋,加(jia)強肋在(zai)(zai)圖(tu)(tu)示范圍(wei)內沿洞(dong)(dong)身(shen)每(mei)2m(中心(xin)間隔(ge))設置(zhi)1道,加(jia)強肋是圓心(xin)角為225°的鋼(gang)(gang)波紋(wen)管(guan)(guan)(型(xing)號(hao)與(yu)(yu)涵(han)洞(dong)(dong)洞(dong)(dong)身(shen)所采(cai)用(yong)(yong)的鋼(gang)(gang)波紋(wen)管(guan)(guan)型(xing)號(hao)相(xiang)同)圓弧片。

南方高填土鋼波紋涵管設計經驗無償奉送

后說,鋼波紋涵管洞(dong)基(ji)(ji)礎(chu)施工時(shi)應在基(ji)(ji)礎(chu)上縱

向預留0.3%~1%的(de)(de)預拱(gong)度(du)。埋(mai)設于(yu)一般土質(zhi)地基上的(de)(de)鋼波(bo)紋管,經過一段(duan)時間后常會產(chan)生(sheng)一定的(de)(de)下沉(chen),而且下沉(chen)量(liang)通常是管道中(zhong)部(bu)(bu)大(da)于(yu)兩端。因(yin)此(ci),敷設于(yu)路(lu)堤(di)下的(de)(de)鋼波(bo)紋管管身要(yao)設置中(zhong)部(bu)(bu)向上的(de)(de)預拱(gong)度(du)。預拱(gong)度(du)大(da)小根據地基可能出現的(de)(de)下沉(chen)量(liang)、涵底縱坡和填土高度(du)等因(yin)素綜(zong)合考慮(lv),通常為管長的(de)(de)0.3%~1%,更(geng)大(da)不(bu)超過2%,以確保管道中(zhong)部(bu)(bu)不(bu)出現凹陷或滑坡。


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