鋼波紋管模板(ban)安裝的質量要求(qiu)(qiu):基本要求(qiu)(qiu):模板(ban)及支(zhi)架應具有(you)良好的強度(du)、剛度(du)和不亂(luan)性。模板(ban)表面平整,接縫應平整、嚴密不漏漿。質量尺度(du):質量要求(qiu)(qiu)符(fu)合設計及《公(gong)路橋(qiao)涵施工(gong)技術規范》(JTG/T F50-2011)的劃定(ding)。模板(ban)、支(zhi)架及拱架制作時(shi)的答應偏差(cha)如下表4.6-1/2所示。
鋼波紋管涵根底挖設方法有幾種?
模板(ban)安裝要直順、平(ping)整(zheng),接(jie)縫采(cai)用海綿條填塞(sai),保證接(jie)縫嚴密、不露漿。模板(ban)支設完畢后,對(dui)模板(ban)高程及(ji)平(ping)面(mian)位置進行復測,并檢修模板(ban)不亂性(xing)。
洞口工(gong)程為一(yi)字(zi)墻和八(ba)字(zi)墻,按圖紙要求進行施工(gong)。模(mo)板(ban)加(jia)工(gong)及安裝模(mo)板(ban)采(cai)用(yong)組合模(mo)板(ban)或(huo)凈水模(mo)板(ban)。模(mo)板(ban)有變(bian)形(xing)的不得(de)使用(yong)。施工(gong)前模(mo)板(ban)剛度、強(qiang)度、不亂性及結構(gou)各(ge)部外形(xing)、尺寸已經經由校(xiao)核,符(fu)合規(gui)范及設計要求。
管壁及配套附件均經由熱浸(jin)鍍鋅(xin)處理,其鍍鋅(xin)層的平均厚(hou)度大于84um。涵(han)管運至施(shi)工(gong)現場(chang)后,工(gong)地現場(chang)涂(tu)刷兩(liang)頭瀝青。密(mi)封材料選用耐久功能較好的橡膠密(mi)封圈或方形石棉盤 根(gen)密(mi)封條。
鋼波紋管的結構處(chu)理:(1)波紋為(wei)圓形全體管(guan)(guan),選(xuan)用整管(guan)(guan)節組裝、法蘭(lan)螺(luo)栓銜接(jie)(jie)。(2)鋼(gang)制波紋板涵管(guan)(guan)加工后須選(xuan)用熱鍍(du)鋅等防腐處(chu)理。選(xuan)用 鍍(du)鋅鋼(gang)板加工的,在(zai)加工后有必(bi)要進(jin)行二次處(chu)理。全體管(guan)(guan)銜接(jie)(jie)法蘭(lan)選(xuan)用角鋼(gang)、鋼(gang)板制造,波紋板焊接(jie)(jie)選(xuan)用 對焊接(jie)(jie)頭。緊固件(jian)(jian)選(xuan)用國標中的尺(chi)度(du)緊固件(jian)(jian),其(qi)強度(du)和尺(chi)度(du)應(ying)知足(zu)力學哀求,且不低于管(guan)(guan)材強度(du)哀求。墊(dian)片與緊固件(jian)(jian)般(ban)配。螺(luo)栓與螺(luo)母(mu)均選(xuan)用熱浸(jin)鍍(du)鋅處(chu)理。
波紋(wen)(wen)(wen)管(guan)(guan)(guan)涵根(gen)底(di)(di)挖(wa)設方(fang)法建筑(zhu)(zhu)鋼波紋(wen)(wen)(wen)管(guan)(guan)(guan)涵,通常(chang)要在自然地(di)面(mian)(mian)或(huo)經(jing)嚴肅夯(hang)實的填(tian)(tian)(tian)方(fang)土上。首(shou)要發掘埋設管(guan)(guan)(guan)道的溝槽。挖(wa)槽的寬(kuan)度不但應(ying)利便管(guan)(guan)(guan)旁邊面(mian)(mian)填(tian)(tian)(tian)土的夯(hang)填(tian)(tian)(tian),并且(qie)還(huan)應(ying)知足規(gui)劃上根(gen)底(di)(di)需求(qiu)的寬(kuan)度。多年的施工(gong)經(jing)驗標明,在填(tian)(tian)(tian)土不高的路(lu)段上建筑(zhu)(zhu)涵洞,宜采用先填(tian)(tian)(tian)路(lu)基,然后再開挖(wa)溝槽埋設涵管(guan)(guan)(guan)的方(fang)法較好。鋼波紋(wen)(wen)(wen)管(guan)(guan)(guan)地(di)基或(huo)根(gen)底(di)(di)哀(ai)求(qiu)平均又鞏固(gu),同(tong)時,還(huan)應(ying)具有耐久性,通常(chang)波紋(wen)(wen)(wen)管(guan)(guan)(guan)涵根(gen)底(di)(di)應(ying)具有的小厚度與寬(kuan)度.
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