鋼波紋管出廠(chang)(chang)時,涵(han)管(guan)(guan)(guan)及配件均(jun)經由熱浸鍍(du)鋅處理(li),鍍(du)鋅層均(jun)勻厚度(du)(du)(du)大于(yu)84μm,在(zai)沒有(you)亂石沖(chong)洗的(de)情況下,它的(de)鍍(du)鋅層就可防止(zhi)銹(xiu)蝕。目前海(hai)內(nei)涵(han)管(guan)(guan)(guan)出廠(chang)(chang)前,根據鋼管(guan)(guan)(guan)管(guan)(guan)(guan)壁每年蝕耗(hao)厚度(du)(du)(du)0.01-0.03mm,產品都比國外涵(han)管(guan)(guan)(guan)做的(de)要守舊,比正常(chang)管(guan)(guan)(guan)壁厚度(du)(du)(du)增加(jia)了0.5mm,可進步使用(yong)壽(shou)命(ming),而且涵(han)管(guan)(guan)(guan)運至施工現場后,工地涂涮兩遍瀝青,瀝青涂層厚度(du)(du)(du)達(da)到0.3-0.5mm,并且根據海(hai)內(nei)車輛(liang)超載運輸的(de)實際情況,還對金屬波(bo)(bo)紋涵(han)管(guan)(guan)(guan)的(de)技術(shu)參(can)數(波(bo)(bo)距,波(bo)(bo)深,壁厚)進行了調整,增大了涵(han)管(guan)(guan)(guan)在(zai)海(hai)內(nei)使用(yong)的(de)保險(xian)系數。以上(shang)幾種措施即可知足(zu)使用(yong)要求(qiu),使用(yong)壽(shou)命(ming)完(wan)全能適合公(gong)路(lu)的(de)需求(qiu),更能知足(zu)受流石沖(chong)洗的(de)涵(han)洞,確保流石對涵(han)管(guan)(guan)(guan)管(guan)(guan)(guan)壁的(de)沖(chong)擊(ji)。
鋼波紋管的問世解決了哪些實質性問題?
鋼波紋管(guan)(guan)涵洞的(de)施工(gong)(gong)主要有以(yi)(yi)下特點(dian):首先,其(qi)施工(gong)(gong)工(gong)(gong)藝流程(cheng)(cheng)較為特殊,在(zai)(zai)施工(gong)(gong)前要進行(xing)(xing)以(yi)(yi)下工(gong)(gong)作(zuo):施工(gong)(gong)前預備、施工(gong)(gong)放樣(yang)、設置圍堰、排水(shui)清淤以(yi)(yi)及平整場(chang)地(di)等(deng)。在(zai)(zai)施工(gong)(gong)工(gong)(gong)作(zuo)中(zhong)要對(dui)其(qi)壓實(shi)度、含(han)水(shui)量進行(xing)(xing)檢(jian)(jian)測(ce),接著對(dui)水(shui)準進行(xing)(xing)丈量,基(ji)于此,對(dui)施工(gong)(gong)基(ji)礎進行(xing)(xing)分層回填,檢(jian)(jian)測(ce)壓實(shi)度、含(han)水(shui)量等(deng),接著要拼裝管(guan)(guan)節,對(dui)工(gong)(gong)程(cheng)(cheng)的(de)密水(shui)情(qing)況及管(guan)(guan)底縱坡進行(xing)(xing)檢(jian)(jian)測(ce),并對(dui)防腐涂層進行(xing)(xing)檢(jian)(jian)測(ce)與補救(jiu)。施工(gong)(gong)的(de)樞紐的(de)環節就(jiu)是將涵管(guan)(guan)進行(xing)(xing)就(jiu)位,將涵管(guan)(guan)兩側進行(xing)(xing)分層回填,并要檢(jian)(jian)測(ce)壓實(shi)度、含(han)水(shui)量等(deng),后進出口處理工(gong)(gong)作(zuo)。
在公(gong)路涵(han)(han)洞(dong)(dong)中對其破(po)壞(huai)(huai)更大的(de)(de)(de)(de)(de)因素(su)就是沉降不(bu)平均,公(gong)路涵(han)(han)洞(dong)(dong)施(shi)工(gong)中,其使(shi)用材料與工(gong)程(cheng)(cheng)結構(gou)具(ju)有(you)一(yi)定的(de)(de)(de)(de)(de)關系。通常情況下,施(shi)工(gong)職員都會使(shi)用柔性、高強度的(de)(de)(de)(de)(de)鋼(gang)波(bo)(bo)紋管(guan)涵(han)(han)洞(dong)(dong),這(zhe)種(zhong)材料不(bu)僅具(ju)有(you)一(yi)定的(de)(de)(de)(de)(de)適應地基與基礎變形的(de)(de)(de)(de)(de)能力,而且(qie)對于解(jie)決因地基基礎不(bu)平均沉降導致(zhi)的(de)(de)(de)(de)(de)涵(han)(han)洞(dong)(dong)破(po)壞(huai)(huai)題目也(ye)具(ju)有(you)重(zhong)要作用,鋼(gang)波(bo)(bo)紋管(guan)涵(han)(han)洞(dong)(dong)因其軸向波(bo)(bo)紋的(de)(de)(de)(de)(de)存在使(shi)之具(ju)有(you)良好的(de)(de)(de)(de)(de)受力能力。鋼(gang)波(bo)(bo)紋管(guan)涵(han)(han)洞(dong)(dong)的(de)(de)(de)(de)(de)軸向和徑向同時分(fen)布可(ke)以在一(yi)定程(cheng)(cheng)度上(shang)將荷(he)載的(de)(de)(de)(de)(de)應力進行有(you)效分(fen)散,從而更好地施(shi)展鋼(gang)結構(gou)的(de)(de)(de)(de)(de)上(shang)風。利(li)用鋼(gang)波(bo)(bo)紋管(guan)結構(gou)可(ke)以有(you)效修筑不(bu)良工(gong)程(cheng)(cheng)巖土地區的(de)(de)(de)(de)(de)涵(han)(han)洞(dong)(dong),如(ru):多(duo)年凍土、軟(ruan)土、膨脹土、濕(shi)陷(xian)性黃土等不(bu)良工(gong)程(cheng)(cheng)巖土地區。鋼(gang)波(bo)(bo)紋管(guan)因其明顯的(de)(de)(de)(de)(de)上(shang)風也(ye)使(shi)其具(ju)有(you)更廣闊的(de)(de)(de)(de)(de)應用遠景。
鋼波紋(wen)管(guan)作為(wei)一種新型技(ji)(ji)術(shu)在(zai)公(gong)路涵洞工(gong)程施(shi)工(gong)中的具有(you)很大的上風,鋼波紋(wen)管(guan)涵洞技(ji)(ji)術(shu)不僅具有(you)施(shi)工(gong)周(zhou)期短、適(shi)應(ying)能(neng)力強(qiang)、地基承載力要(yao)求低的特點(dian),而且具有(you)較強(qiang)的耐(nai)性,可(ke)以(yi)大大減少施(shi)工(gong)的時間,因而這種技(ji)(ji)術(shu)被運用(yong)。本文(wen)主要(yao)探討(tao)了鋼波紋(wen)管(guan)涵洞的技(ji)(ji)術(shu)特點(dian)以(yi)及上風。
金屬(shu)波紋涵(han)(han)管(guan)代(dai)替(ti)鋼筋混凝土進(jin)(jin)行(xing)涵(han)(han)洞(dong)施(shi)(shi)(shi)工(gong),不管(guan)從施(shi)(shi)(shi)工(gong)周期,施(shi)(shi)(shi)工(gong)造價,環保意(yi)義等(deng)方面都(dou)有(you)其(qi)不可相比(bi)的優勝性(xing),且用金屬(shu)波紋涵(han)(han)管(guan)進(jin)(jin)行(xing)涵(han)(han)洞(dong)施(shi)(shi)(shi)工(gong),可大大進(jin)(jin)步道路行(xing)車的恬靜度與(yu)安全(quan)性(xing),避(bi)免道路中(zhong)涵(han)(han)洞(dong)的“錯臺跳車”現形,有(you)利于解(jie)決西北(bei)及我國嚴寒地區霜凍對砼管(guan)涵(han)(han)結構(gou)的破壞題目。
有利于改(gai)善軟土,膨脹土,濕陷性黃土等特殊地(di)基結(jie)構(gou)物處的(de)(de)不平(ping)均(jun)沉降題目,進步了(le)公路(lu)服務機(ji)能(neng),減少了(le)工后養護本錢(qian);解決北方嚴(yan)寒地(di)區(霜凍)對橋(qiao)梁混凝土結(jie)構(gou)的(de)(de)破壞(huai)。
工(gong)程實際造價比同(tong)類跨徑的(de)橋,涵(han)洞低(di);施工(gong)工(gong)期短,主要為(wei)拼裝施工(gong);采用尺(chi)度化設(she)(she)計,出(chu)產,設(she)(she)計簡樸(pu),出(chu)產周期短;出(chu)產不(bu)受環境影響,進行集中(zhong)工(gong)廠化出(chu)產,有(you)利降低(di)本錢,控(kong)制質量;現(xian)場安裝不(bu)需使用大型設(she)(she)備(bei),利便安裝;減少(shao)了水(shui)泥,塊(kuai)片(pian)石或碎石,砂等的(de)用量,有(you)利于環保;
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