(8)eachbatchofhighstrengthboltsshouldhavethefactorycertificate,theboltconnectionvicetorqueshouldbeaccompaniedbythetorquecoefficientoftheaveragevalue,standarddeviationofthetestdataandtorquecoefficienttestenvironmenttemperatureandothertechnicalinformation.(9)波形梁護(hù)欄、勾當(dāng)式鋼護(hù)欄及螺栓护昧、螺母魂迄、墊圈、墊片等所有部件均應(yīng)按《高速公路交通工程鋼構(gòu)件防腐手藝前提》(GB/T)的劃定采用熱浸鍍鋅(鋁)進(jìn)行金屬概況處置惋耙;
熱浸鍍鋅應(yīng)采用《鋅錠》(GB/T470—1997)中所劃定的特一號鋅錠或一號鋅錠捣炬,鍍鋅構(gòu)件鋅層質(zhì)量應(yīng)合適表602-1的劃定。熱浸鍍鋁應(yīng)采用《重熔用鋁錠》(GB/T1196-1993)中所劃定的特一級绽榛、特二級湿酸、一級鋁錠,鍍鋁構(gòu)件鋁層質(zhì)量應(yīng)合適表602-2的劃定灭美。(9)W-beamguardrail,activitytypesteelguardrailandbolts,nuts,washers,gaskets,etc.allthepartsshallbeinaccordancewiththeprovisionsofthehighwaytrafficengineeringsteelstructureanticorrosiontechnicalconditions"GB/Tbyhotdipgalvanized(AL)metalsurfacetreatment;hotdipgalvanizingshouldadoptthe"zinc"(GB/T470-1997stipulatedthespecialNo.azincingotsor1zincingots,componentgalvanizedzinclayerqualityshallconformtospecifiedintable602-1.Hotdipaluminumshouldadopttheremeltingwithaluminumingot"(GB/T1196-1993)requiredaspecial,specialsecondaryandprimaryaluminumingot,aluminumaluminumcomponentlayerqualityshallconformtotherequirementsintable602-2.高強(qiáng)度螺栓進(jìn)行熱浸鍍鋅處置后稿械。
對高強(qiáng)度螺栓毗連件概況要涂黃油,并進(jìn)行磷化潤滑處置冲粤,在出廠時應(yīng)密封包裝寿宅,以防運(yùn)輸、保留時代生銹或弄臟船遣。Hotdipgalvanizedhighstrengthbolts,ofhighstrengthboltconnectionsurfaceshouldbecoatedwithbutter,andphosphatizinglubrication,inthefactoryshouldbesealedpackaging,topreventtransportation,preservationperiodofrustordirty.(10)鍍鋅構(gòu)件的鋅層應(yīng)平均卫糙,試樣經(jīng)溶液浸蝕5次不變紅,并合適《高速公路波形梁鋼護(hù)欄》(JT/T281-1995)附錄B的劃定样呜;
鍍鋅構(gòu)件的鋅層應(yīng)與基底金屬連系安穩(wěn)欺靠,經(jīng)捶擊試驗(yàn)鍍鋅層不剝離、不凸起覆珍,并合適《高速公路波形梁鋼護(hù)欄》(JT/T281-1995)附錄C的劃定肾寡。(10)componentgalvanizedzinclayershouldbeuniformsamplebyetchingofthecoppersulphatesolution,5timesthesamered,andinaccordancewiththeprovisionsofthehighwayguardrail,JT/T281-1995AppendixB;componentgalvanizedzinclayershouldbeandbasemetalisfirmlycombinedbyhammeringtestgalvanizedlayernotpeeling,notraised,andinaccordancewiththeprovisionsofthehighwayguardrail,JT/T281-1995AppendixC.The(11)鍍鋁構(gòu)件的鋁層應(yīng)平均。
波形梁護(hù)欄是一種公路中央分隔帶開口處用組合型波形板活動式鋼護(hù)欄,該護(hù)欄由兩片波形鋼護(hù)欄板及兩者之間固定夾放的兩根立柱構(gòu)成耿愈,兩根立柱固定夾裝在兩片波形鋼護(hù)欄板之間倡超。在公路正常營運(yùn)時,該護(hù)欄利用插拔立柱可方便地插入開口處預(yù)先設(shè)置的插拔孔內(nèi)朦暖,起到隔離和防護(hù)作用扎怨,同時與公路外邊上的護(hù)欄帶相呼應(yīng),整齊劃一儒鹿,美觀配套化撕。車輛對其碰撞時,由于波形鋼護(hù)欄板有良好的耐撞性