跟著鋼波紋涵管在(zai)世界各地的安(an)裝使(shi)用(yong)(yong)(yong)(yong),證實(shi)了此種結(jie)構(gou)在(zai)各種使(shi)用(yong)(yong)(yong)(yong)情況下的通用(yong)(yong)(yong)(yong)性。在(zai)我國改革(ge)開放后,深圳及大(da)(da)同(tong)煤礦開始從國外入口成品波紋管(guan)涵(han)進(jin)(jin)行(xing)涵(han)洞施工(gong)。之后,上(shang)海市(shi)公路治理處、上(shang)海市(shi)政工(gong)程(cheng)設計研(yan)究院、上(shang)海同(tong)濟大(da)(da)學對金屬波紋管(guan)涵(han)進(jin)(jin)行(xing)了動、靜載(zai)試(shi)驗,結(jie)果表明能知足設計使(shi)用(yong)(yong)(yong)(yong)要求(qiu),填補了海內的空(kong)缺,且迅速(su)得(de)到推(tui)廣應(ying)用(yong)(yong)(yong)(yong)。幕(mu)墻一貫反應(ying)用(yong)(yong)(yong)(yong)于我國各地公路舉措措施建(jian)設當中。
近些年鋼波紋涵管在世界范圍內高速發展
公(gong)(gong)路(lu)(lu)工(gong)(gong)(gong)程的(de)涵(han)洞(dong)一(yi)般采用(yong)金(jin)(jin)屬筋(jin)混凝(ning)土(tu)制作。現(xian)采用(yong)金(jin)(jin)屬波(bo)紋(wen)(wen)管(guan)涵(han)代(dai)替金(jin)(jin)屬筋(jin)混凝(ning)土(tu)進(jin)(jin)行(xing)涵(han)洞(dong)施(shi)工(gong)(gong)(gong)在(zai)(zai)海(hai)內(nei)時(shi)一(yi)項新技術,金(jin)(jin)屬波(bo)紋(wen)(wen)管(guan)涵(han)以其機能不亂、安裝(zhuang)利便、有利環保、造價低等(deng)長(chang)處迅速在(zai)(zai)公(gong)(gong)路(lu)(lu)施(shi)工(gong)(gong)(gong)中(zhong)代(dai)替了(le)(le)金(jin)(jin)屬筋(jin)混凝(ning)土(tu)施(shi)工(gong)(gong)(gong)的(de)涵(han)洞(dong),發(fa)展遠景(jing)非(fei)常廣闊(kuo)。在(zai)(zai)公(gong)(gong)路(lu)(lu)施(shi)工(gong)(gong)(gong)中(zhong),應用(yong)金(jin)(jin)屬波(bo)紋(wen)(wen)管(guan)涵(han)代(dai)替金(jin)(jin)屬筋(jin)混凝(ning)土(tu)進(jin)(jin)行(xing)涵(han)洞(dong)施(shi)工(gong)(gong)(gong)的(de)歷史已經(jing)有100多年了(le)(le)。1896年,美(mei)國(guo)率提高前輩行(xing)波(bo)紋(wen)(wen)管(guan)涵(han)通道、涵(han)管(guan)的(de)可行(xing)性(xing)研究(jiu)。其后,在(zai)(zai)美(mei)國(guo)、加(jia)拿大、澳大利亞等(deng)國(guo)的(de)公(gong)(gong)路(lu)(lu)建設中(zhong),均采用(yong)了(le)(le)金(jin)(jin)屬波(bo)紋(wen)(wen)管(guan)涵(han)進(jin)(jin)行(xing)涵(han)洞(dong)的(de)施(shi)工(gong)(gong)(gong)。1990年,日本高速公(gong)(gong)路(lu)(lu)設計(ji),規范制定了(le)(le)波(bo)紋(wen)(wen)管(guan)涵(han)設計(ji)技術規范。
金(jin)屬(shu)波紋管(guan)(guan)涵是將薄金(jin)屬(shu)板板面壓成波紋后,卷制成管(guan)(guan)節,可以(yi)增(zeng)加管(guan)(guan)節的(de)剛度和(he)對管(guan)(guan)軸壓力(li)的(de)抵(di)擋強度;出廠(chang)前采用熱浸鍍鋅工藝和(he)施(shi)工現場噴涂瀝青(qing),雙層(ceng)防腐處理保(bao)證了使用壽命;用此種管(guan)(guan)節修建(jian)的(de)涵洞(dong)被稱(cheng)為波紋金(jin)屬(shu)管(guan)(guan)涵。實踐證實,用金(jin)屬(shu)波紋管(guan)(guan)涵代替金(jin)屬(shu)筋混(hun)凝土(tu)進行(xing)(xing)涵洞(dong)施(shi)工,不管(guan)(guan)從施(shi)工周期、施(shi)工造價、環保(bao)意義等方面都有其不可相比的(de)優勝性,且用金(jin)屬(shu)波紋管(guan)(guan)涵進行(xing)(xing)涵洞(dong)施(shi)工,可大大進步道(dao)路(lu)行(xing)(xing)車的(de)恬靜度與(yu)安全性,避免道(dao)路(lu)中涵洞(dong)的(de)“錯(cuo)臺跳(tiao)車”現形,有利于解決(jue)西(xi)北地區嚴(yan)寒霜凍對砼(tong)管(guan)(guan)涵結構的(de)破壞(huai)題目。
鋼波紋涵管設計(ji)計(ji)算(suan)的(de)(de)參數為剛度(du)(du)(du)(du)、應(ying)力、有效面積、失(shi)穩、答應(ying)位移、耐壓(ya)力和(he)使用壽命(ming)。波(bo)(bo)紋管(guan)的(de)(de)剛度(du)(du)(du)(du)計(ji)算(suan),波(bo)(bo)紋管(guan)的(de)(de)剛度(du)(du)(du)(du)按照載荷及位移性質不同,分為軸向(xiang)剛度(du)(du)(du)(du)、彎曲剛度(du)(du)(du)(du)、扭(niu)轉剛度(du)(du)(du)(du)等(deng)。目(mu)前在波(bo)(bo)紋管(guan)的(de)(de)應(ying)用中,絕大(da)多數的(de)(de)受力情況是軸向(xiang)載荷,位移方式為線位移。
根據波紋管(guan)的結構特點,可(ke)以把波紋管(guan)當(dang)作(zuo)圓(yuan)(yuan)環殼(ke)(ke)、扁錐殼(ke)(ke)或(huo)圓(yuan)(yuan)環板所組(zu)成。設計(ji)計(ji)算波紋管(guan)也就是設計(ji)計(ji)算圓(yuan)(yuan)外殼(ke)(ke)、扁錐殼(ke)(ke)或(huo)團環板。
金屬波(bo)紋(wen)管(guan)(guan)設(she)計(ji)(ji)(ji)的理論(lun)基礎是板殼理論(lun)、材料力(li)學、計(ji)(ji)(ji)算數學等。波(bo)紋(wen)管(guan)(guan)設(she)計(ji)(ji)(ji)的參(can)數較多,因(yin)為波(bo)紋(wen)管(guan)(guan)在系統中的用途(tu)不(bu)同,其(qi)設(she)計(ji)(ji)(ji)計(ji)(ji)(ji)算的重點也不(bu)一樣。例如(ru),波(bo)紋(wen)管(guan)(guan)用于力(li)平衡元件,要(yao)求(qiu)波(bo)紋(wen)管(guan)(guan)在工作范圍內其(qi)有效面積不(bu)變(bian)或(huo)變(bian)化很小,用于丈量元件,要(yao)求(qiu)波(bo)紋(wen)管(guan)(guan)的彈性特性是線性的;用于真(zhen)空開(kai)關管(guan)(guan)作真(zhen)空密封(feng)件,要(yao)求(qiu)波(bo)紋(wen)管(guan)(guan)的真(zhen)空密封(feng)性、軸向位(wei)移量和疲憊壽命(ming);用于閥門作密封(feng)件,要(yao)求(qiu)波(bo)紋(wen)管(guan)(guan)應具有一定的耐壓力(li)、耐侵(qin)蝕、耐溫度、工作位(wei)移和疲憊壽命(ming)。
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