板(ban)(ban)(ban)(ban)的(de)(de)厚度(du)隨結構跨(kua)徑的(de)(de)大小(xiao)變化(hua),板(ban)(ban)(ban)(ban)厚可選用2.5~8mm。板(ban)(ban)(ban)(ban)的(de)(de)波形為(wei)提高(gao)板(ban)(ban)(ban)(ban)的(de)(de)剛(gang)度(du),板(ban)(ban)(ban)(ban)的(de)(de)截面(mian)從平板(ban)(ban)(ban)(ban)加(jia)工成一定(ding)波幅的(de)(de)波形狀,從加(jia)工、拼裝及板(ban)(ban)(ban)(ban)的(de)(de)剛(gang)度(du)要求出(chu)發,并(bing)參照(zhao)國(guo)內(nei)外同類產品的(de)(de)波形來進行設計。鋼波紋涵管螺栓(shuan)設(she)計(ji)要點(dian)螺栓(shuan)的選型根據實際施(shi)工(gong)中需要的預緊力,選用合適的高(gao)強螺栓(shuan)應用于工(gong)程施(shi)工(gong)。
鋼波(bo)紋涵管(guan)對螺栓的設計(ji)要(yao)求有哪(na)些?
鋼制(zhi)波紋(wen)涵管的(de)(de)(de)材(cai)(cai)料主要(yao)有鋼質波紋(wen)板(ban)(ban)(ban)材(cai)(cai)和高強度螺栓連接組成,其中鋼質波紋(wen)板(ban)(ban)(ban)材(cai)(cai)采用國(guo)內普遍使用的(de)(de)(de)A3或Q235-A熱軋(ya)鋼板(ban)(ban)(ban),鋼板(ban)(ban)(ban)的(de)(de)(de)理化指(zhi)標(biao)要(yao)求達(da)到(dao)國(guo)際(ji)GB700的(de)(de)(de)有關要(yao)求。板(ban)(ban)(ban)的(de)(de)(de)尺寸和厚度為(wei)便于板(ban)(ban)(ban)的(de)(de)(de)加工制(zhi)作(zuo),結構的(de)(de)(de)安(an)裝連接,提高板(ban)(ban)(ban)的(de)(de)(de)制(zhi)作(zuo)精度,板(ban)(ban)(ban)材(cai)(cai)的(de)(de)(de)尺寸宜適(shi)應不同管徑的(de)(de)(de)需(xu)要(yao),以形成系(xi)列化。
橋梁鋼(gang)波紋管
孔徑(jing)大小、孔間(jian)距(ju)(ju)及邊距(ju)(ju)值根據(ju)預緊(jin)力的要(yao)求選用(yong)的螺(luo)(luo)栓(shuan)可以參照(zhao)《鋼結構高強螺(luo)(luo)栓(shuan)連接(jie)的設計、施(shi)工及驗收規(gui)程》中(zhong)的高強螺(luo)(luo)栓(shuan)孔徑(jing)選配表選擇適當的孔徑(jing),以滿足工程施(shi)工的規(gui)范(fan)要(yao)求。鋼制(zhi)波(bo)(bo)紋涵(han)(han)管(guan)(guan)按安(an)裝(zhuang)方(fang)式分為整體安(an)裝(zhuang)波(bo)(bo)紋涵(han)(han)管(guan)(guan)和分片安(an)裝(zhuang)波(bo)(bo)紋涵(han)(han)管(guan)(guan)。
整體安(an)裝波(bo)紋(wen)涵管(guan)的(de)螺栓起縱向(xiang)連(lian)接(jie),螺栓受到的(de)剪(jian)切作用(yong)較小,可以(yi)選(xuan)用(yong)普通高強螺栓即可。分片(pian)安(an)裝波(bo)紋(wen)涵管(guan)的(de)設計(ji)過程中(zhong)進(jin)行(xing)力(li)學(xue)計(ji)算(suan)的(de)前提假設為:不考(kao)慮波(bo)紋(wen)管(guan)的(de)搭接(jie)頭,設波(bo)紋(wen)管(guan)沿周向(xiang)是(shi)均(jun)勻(yun)、連(lian)續、光滑的(de),然而實(shi)際采(cai)用(yong)片(pian)狀波(bo)紋(wen)板,并(bing)利用(yong)高強螺栓連(lian)接(jie)拼裝起來(lai)的(de)。
由于設(she)計和現場(chang)施(shi)工的(de)(de)這一對(dui)矛(mao)盾(dun)的(de)(de)存在,決定了其安(an)裝施(shi)工的(de)(de)關(guan)鍵是鋼(gang)質波(bo)(bo)紋板材的(de)(de)環向(xiang)連(lian)接和軸向(xiang)連(lian)接的(de)(de)強(qiang)度能否與不考慮搭接頭的(de)(de)整(zheng)體波(bo)(bo)紋管(guan)的(de)(de)強(qiang)度相一致,根(gen)據分片安(an)裝波(bo)(bo)紋涵管(guan)的(de)(de)受力特性及傳力特點,結合有關(guan)鋼(gang)結構施(shi)工技(ji)術規范,提出分片安(an)裝波(bo)(bo)紋涵管(guan)螺栓設(she)計要(yao)點。(hanihanbj.com)
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