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天津海河大桥钢桥面的铺装方案X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
【内容摘要】介绍天津海河大桥钢桥面的铺装方案，以及施工中的质量控制措施。对钢桥面铺装的方法进行探讨 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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【关键词】钢桥面；铺装方案；SMA混合料； X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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一、 前言X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
钢桥面铺装是大跨径钢桥建设中的一项很复杂、很关键的技术，在当前仍然是世界性的技术难题。钢桥面的受力状态、铺装材料的基本强度、变形性能、抗腐蚀性、水稳性、高温稳定性、低温抗裂性、粘接性、抗滑性、施工工艺等要求很高。在我国虽然通过虎门大桥、广东汕头宕石大桥、厦门海沧大桥、武汉白沙洲大桥等的实践，双层SMA钢桥面成套技术，日趋成熟，但是我们也不得不承认，该工艺引入我国时间较短，未经过时间的检验，基本上还不能说有成功的经验，向三峡西陵长江大桥、虎门大桥等几座大桥在竣工后不久，不同程度上都进行了翻修，甚至全面返工。X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
在国外，尤其是日本及欧洲在长大跨径钢梁斜拉桥、悬索桥的建设已经具有悠久的历史，在桥面铺装方面有许多成功的经验，但是日本、欧洲的气候条件与我国有很大差异。日本属东亚季风气候并具有海洋性特征，形成较为温和和湿润的海洋性气候，即冬无严寒，夏无酷暑。欧洲的气候条件就更好。天津地区属温带半湿润季风气候，具有海洋型与大陆型过渡气候特点，气候温和，四季分明，雨量充沛，春秋季短，冬寒夏热。夏季降水集中，易出现暴雨造成夏涝。其余季节雨水偏少。本地区7～8月份温度最高，最高气温39℃左右，按美国SHRP方法计算，路表最高温度T=Tair+26.3，当气温达到39℃时，路表最高温度达65.3℃。冬季时间长，最低气温可达-15℃左右，昼夜温差大。这样的气候差异必须考虑，并在设计与施工中引起足够的重视。我国近几年虽然引进了大量的先进的机械设备，在此方面不落后于发达国家，但是在筑路材料的生产、开发、应用上还严重落后，从沥青、砂石料等各种原材料还严格遵循就地取材，节约成本的原则，生产的原材料质量还达不到西方国家质量要求，这也是我国高速公路质量达不到西方发达国家高速公路质量的一个重要原因。 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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钢桥面铺装与普通桥面铺装相比有它自身的特点，概括的说，钢桥面铺装应具备以下基本性能： X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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1、应具备良好的层间结合，保证铺装层与桥面板的整体性。 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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2、良好的高温稳定性，能满足高达70℃以上的高温使用条件要求。X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
3、良好的抗变形能力，以适应钢板的变形。 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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4、良好的防排水能力，以保证钢板不受侵蚀。 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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5、良好的抗滑性能和平整度。 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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二、钢桥面铺装层的技术方案X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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（一）、桥面铺装的结构设计
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由于受钢桥面铺装厚度为60mm的限制，依据功能要求，铺装结构层按双层改性沥青SMA设计。铺装结构由以下结构层组成：①喷砂除锈、喷涂防护漆；②防水粘接层；③铺装下层SMA10；④改性乳化沥青粘层⑤铺装表面层SMA13。 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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1、铺装下层（厚3.0cm）使用较硬的改性沥青和较小空隙率（2.5%-3.5%）的混合料，保证铺装层具有良好的热稳定性及密水性。铺装上层(厚3.0cm)SMA13则用弹性较好且变形能力优良的改性沥青、粗骨料良好嵌挤的级配（空隙率3.5%-4.5%），以保证铺装对热稳定性、抗裂性及表面抗滑性能的要求。铺装结构图如下： X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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铺装上层（面层）：30CM厚改性沥青SMA13
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粘层：改性乳化沥青0．4～0．6L/M2
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铺装下层（保护层）：30CM厚改性沥青SMA10
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防水粘结层：3-5MM；粘结剂0．8～1．2MM X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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及2．36～4．75MM预拌沥青碎石满铺一层
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富锌底漆50～100μm
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钢板12MM；喷砂除锈（Sα2．5级）
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2、 桥面喷砂除锈（Sa2.5级）后喷涂50-100μm富锌底漆及防水粘接层组成防水层，防水层与铺装下层组成防水隔离层。防护漆要求与钢板的结合力达到5.0Mpa，其技术要求如下表： X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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3、 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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技术指标 要 求 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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漆面 平光 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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颜色 金属灰色 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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色号 1984 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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体积固含量 64% X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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理论涂布率 12．8M2/ L（以膜厚50μm计）[mm1]X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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闪电 14℃ X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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比重 2．65kg/L X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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指干（20℃） 30min X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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完全固化（20℃） 24h X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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挥发性有机物质含量（V、O、C） 535g/l X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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储存期（25℃） 6个月 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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状态 无液体胶化或施工前胶化 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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与钢板结合力 ≥5．0MPa X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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3、 防水粘接层由满布厚0.8-1.2mm的粘接剂及在其上撒布一层预拌沥青碎石层组成，具有连接防护漆与铺装层的粘接作用，同时具有较高的强度和一定的低温变形能力及较高的硬度。该材料在70℃以下使用均具有良好的抵抗剪切变形的能力。预拌沥青碎石采用硬质碎石与0.5%-0.8%的石油沥青在180-200℃温度下拌和而成。防水粘接层上撒布预拌的碎石，在其上层的SMA10混合料高温摊铺与碾压成型过程中，其已嵌入SMA10混合料中形成整体，铺装完成后，该层不独立存在。X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
粘接剂的性能必须满足下表的要求： X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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指 标 要求 实测值 实验方法 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
软化点（R＆B）/℃ ≥100 105 JTJ052-93X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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针入度（25℃，100g，5s）/0．1mm ≤30 11．6 JTJ052-93X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
5℃扯断伸长率（5cm/min）/% ≥20 350 JTJ052-93X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
25℃回弹率/% ≥50 82 JTJ036-98 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
与桥面板黏附力（25℃）/MPa ≥1．2 2．0 参照日本本四桥X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
190℃粘度/mm2/s ≥1500 791．4 ASTMD2170 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
预拌碎石质量要求如下表： X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
指 标 要 求X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
集料压碎值/% ≤18X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
沥青含量/% 0．5～0．8X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
粒径2．36～4．75mm含量 ＞80X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
拌和后状态 高温及冷却后均不结团X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
集料针片状含量 ≤15X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
4、 在铺装上、下层之间，采用改性沥青粘层（0.4-0.6L/m2）,以保证铺装上、下层的整体性。X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
（二）、改性沥青SMA混合料设计
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîËX¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
1、铺装上层及下层改性沥青技术要求如下表： X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
指 标 要 求 实验方法X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
上层 下层X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
针入度（25℃，100g，5s）/0．1mm 30～60 20～40X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
软化点（环球法）/℃ Ⅷ≥70 ≥80 JTJ052-93X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
延度（10℃，5cm/min）cm ≥30 实测记录X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
60℃/（Pa．S） ≥4000 ≥4000 ASTM．D2171X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
粘 ASTM．D2170X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
度 135℃/（Pa．S） ≤3 ≤3X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
JISK2207X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
回弹率（25℃，20cm，30min）/% ≥ 90 80 JTJ036-98X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
脆点（计算T1．2）/℃ ≤ -15 ≤ -10 JTJ052-93 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
闪点/℃ ≥230 ≥230 JTJ052-93X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
针入度指数PI ≥1．0 ≥1．0 JTJ052-93X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
薄膜烘箱 质量损失/% ≤1．0 ≤1．0X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
针入度比/% ≥65 ≥65 JTJ052-93X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
180℃×2．5h 回弹率比% ≥80 ≥80X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
注：T1、2 即针入度为1、2时的温度，依据10℃，25℃，35℃针入度回归计算； X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
PI依据10℃，25℃，35℃针入度回归计算。 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
2、 集料及矿粉X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
选用玄武岩作为海河大桥钢桥面铺装用碎石。粗集料、细集料及矿粉应满足我国《公路沥青路面施工技术规范》（JTJ032-94）中的表C.8、表C.11及表C.12中的要求。特别强调粗集料的1：3细长扁平颗粒含量必须＜15%，1：5细长扁平颗粒含量应＜5%。洛杉矶磨耗损失应＜30%，粗集料磨光值≥42（BPN）。X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
3、 纤维是用于SMA混合料中的稳定剂，采用进口纤维产品。考虑采用Kapejo公司的聚脂纤维BoniFibers或英国的DOLANIT。X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
4、 乳化沥青采用SBR改性，改性剂含量大于6%（沥青质量比），要求每平方米0.4-0.6kg，以增强铺装上、下层的结合力。X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
5、 混合料级配与性能要求X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
铺装下层使用SMA10级配，铺装上层使用SMA13级配，其设计级配应符合下表的要求：X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
通过筛孔 上面层 下面层X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
mm SMA13 SMA10X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
16 100 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
13.2 90～100 100X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
9.5 ＜75 90～100X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
4.75 20～30 30～45X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
2.36 16～24 22～32X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
1.18 14～20 18～26X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
0.6 12～18 14～20X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
0.3 11～17 12～18X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
0.15 10～14 10～16X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
0.075 8～11 8～13X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
铺装下层沥青用量（油石比）范围为：5.5%-7.0%，铺装上层沥青用量为6.0%-7.0%均需现场进行配合比设计并检验性能后确定。设计混合料性能需满足下表的技术要求：X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
混合料类型X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË | 铺装下层SMA10X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË | 铺装上层SMA13X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË |
VMA矿料间隙率 %X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË | ＞16.5X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË | ＞17.0X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË |
Va 空隙率 %X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË | 2.5-3.5X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË | 3.5-4.5X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË |
70℃动稳定度 （次/mm）X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË | ＞3000X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË | ＞2000X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË |
马歇尔试验X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË | 稳定度 KN X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË | ＞6.2X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË | ＞6.2X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË |
流值 0.1mmX¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË | 20-40X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË | 20-40X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË |
浸水马歇尔试验X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË | 残留稳定度 %X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË | ＞80X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË | ＞80X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË |
析漏量 %X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË | ＜0.1X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË | ＜0.1X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË |
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
（三）、改性沥青SMA施工工艺
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîËX¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
1、施工条件。SMA铺筑厚度薄，松铺系数较传统的AC小，且表面粗糙，摊铺后冷却快，给压实带来困难，钢桥面使用高粘度改性沥青SMA混合料，为保证施工和易性，混合料的施工温度比一般的SMA大约提高25-35℃，在这样的情况下必须有较高的环境温度，因此要求施工时最低气温与路床温度为15℃。X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
2、混合料的生产和铺筑X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
混合料的生产采用间歇式拌和装置，生产率为120t/h，拌和装置具有精确的计量系统，自动化程度高。由于加入纤维，矿粉用量大及采用高粘度改性沥青，增加了干拌和湿拌时间，使拌和装置生产率大幅度下降，实际生产率仅为60-70t/h。X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
为适应SMA混合料铺筑厚度薄、冷却快的特点，必须在最短时间，在135℃以上温度将混合料压实到要求密度。整个压实作业采用2台INGERSOLL-RAND DD-110双钢轮振动压路机一步压实的方式。2台压路机紧跟2台摊铺机趁热压实，压实长度控制在20-30m以内。以往的试验证明，在170-180℃的高温下进行碾压，SMA混合料都很稳定，没有发生纵向推移现象。下层采用高频率低振幅模式进行振动压实，上层采用静态模式压实。X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
（1）.沥青混合料拌和 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
①拌和站应具有自动记录功能，在拌和过程中能逐盘记录沥青及各种矿料的用量和温度。矿料、油量、温度控制必须满足规范要求。 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
②拌和厂的设置应符合国家有关环境保护、消防、安全等规定要求。 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
③拌和厂必须配备足够实验设备的试验室和熟悉沥青混合料的试验、生产工艺、质量标准的技术骨干人员，并能及时提供给监理工程师满意的试验资料。 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
④没有施工配合比通知单不准开盘，没有摊铺负责人的指令不准开盘，下雨天不准开盘。 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
⑤拌和操作人员无权改变施工配合比，发现异常时应停机或及时通知拌和厂技术负责人。 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
⑥当使用自动操作装置时，操作人不宜采用手动操作。 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
⑦应严格控制沥青混合料的施工温度。 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
⑧拌和厂拌和的沥青混合料均匀一致,无花白料、无结团或严重的粗细集料离析现象,不符合要求时不得使用,并应及时调整. X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
⑨出厂的沥青混合料应每车签发运料单(车号、重量、出厂时间、出厂温度、结构类型)一式三份，一份存拌和厂，一份交摊铺现场，一份交司机。 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
⑩每天开机前应对燃料、沥青矿料等作好储量调查，看是否满足工程需要。 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
⑩每天下班前应对拌和机部件、油路、电路、仪表等进行检查维修，并清扫操作室，还应及时完整地作好设备运转记录。 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
（2）.沥青混合料的运输 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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①运输车的运输量应较拌和能力有所富余，运输车辆必须是15T以上的自卸翻斗车（且车况良好），运送混合料时，车内必须清洁。 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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②施工前应对驾驶员进行培训，加强对车的保养、避免运料途中停车。 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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③装料时汽车应前后移动，避免混合料离析。 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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④运料车应覆盖，防止受到风吹、日晒、雨淋、污染等。 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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⑤运料车应在摊铺机前10cm—30cm处停放，不得撞击摊铺机，并设专人指挥。卸料过程中运料车应挂空挡，靠摊铺机推动前进。 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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⑥沥青混合料运至摊铺地点后应凭运料单接收，并检查拌和质量及温度。不符合温度要求的，或已经结成团块、已遭雨淋的混合料不得摊铺在路上。 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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⑦当汽车将沥青混合料卸后，每车都要注意粘结在车厢内的沥青混合料剩余物，不得随意乱倒，更不许倾倒在已铺或未铺的路面上，必须听从专人指挥，倒在指定地点。 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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⑧除非运来的材料可以在白天铺完并能压实，或者在铺筑现场有足够的照明设备，当天或当班不能完成压实的混合料不得运往现场。否则，多余的混合料不得使用。 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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（3）.沥青混合料的摊铺 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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①下承层准备:铺筑前，首先对下层的施工放样反复核实,不仅摊铺宽度足够，而且中线也不能偏位；另外检查下层的平整度、标高都必须符合要求，不和格处要进行处理。之后对表面进行清扫和修补，使基层表面无明显离散、松散和大量浮尘、浮沙等； X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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②摊铺机采用进口设备，并配备浮式基准梁，表面层必须全幅摊铺。 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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③摊铺机准备： X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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a．根据摊铺速度、厚度、温度等因素调整摊铺机夯锤频度，使其出压前的密实度达85%左右。 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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b．根据虚铺厚度调节熨平板的工作倾角（熨平板前端抬起0.6mm—1.2mm，通过经验确定）保持沥青路面的摊铺厚度。当厚度确定后，准确记录当天完工时的倾角标尺位置，以便次日按同样的位置工作，保证均匀一致的摊铺厚度； X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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c. 做好摊铺机的预热、保温工作，不低于80℃； X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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d. 将螺旋器调整到最佳状态，使螺旋布料器中混合料的高度半螺旋器直径的2/3埋没，一般情况螺旋器轮边距下面层为10-12cm，并将慰平板前缘与布料螺旋之间的距离调至中间位置。 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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④合理安排拌和能力，运料车的运输能力，保证摊铺机摊铺速度均匀，边疆不断地摊铺。摊铺过程中不行随意变换速度。如因故障停机超过30分钟应做成平接缝。 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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⑤设专人清扫摊铺机的两条履带和浮式基准梁小车的路面，保证摊铺机平稳行走。 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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⑥摊铺机的操作应不使混合料沿着料斗的两侧堆积，任何原因使冷却规定温度以下的混合料应予以废弃。 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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⑦摊铺机操作售货员要注意“三点”观察，（螺旋输料末端供料情况，整机转向情况和倾向指示计变化情况）。三点中任何一点出现意外情况，应抓紧时间处理。另外设专人处理螺旋输料器末端料的离析现象。 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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⑧摊铺机集料斗在刮板尚未露出，尚有约10cm厚的热料时拢料，这时在运料车刚退出时进行，面且做到在料斗两翼刚恢原位时，下一辆车即开始卸料，严禁送料刮板外露现象发生。 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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⑨在摊铺机的慰平板上，非本机操作人员不行站立和通行，防止浮动慰平板瞬间下沉，影响路面平整度。 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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⑩应设专人对摊铺温度、虚铺度等进行测量，并作好记录。 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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（4）沥青混合料的压实度及成型 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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①碾压要有专人负责，并对压路机司机进行交底，并有记录。 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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②碾压应将压路机的驱动轮向摊铺机，碾压路线和碾压方向不应突然改变，压路机更不应突然加速，急刹车、中途停机、以防止沥青混合料在碾压过程中应做到慢行、慢回程、慢起步。若为振动压路机，必须停止振动再回程，以防止沥青混合料在碾压过程中形成推移和拥包等不良现象发生。 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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③压路机不能在同一断面上回程碾压，每次回程应前后错开不小于1米距离的阶梯状。初压、复压和终压的回程不准在相同的横断面处，前后相距不少于1米。 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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④严禁任何机械车辆停留在尚未碾压成型和已成型但沥青混合料温度又未冷至自然气温以下的路面上停机。振动压路机在已成型的路面上行驶时应关闭振动。 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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⑤压路机每天应在正式开铺前，全做好加油、加水、维修、调试等到准备工作。严禁压路机在新铺沥青面层上停车加油加水。但在加油时不禁将油滴洒在沥青砼路面层上。 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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在交验前恢复中桩的基础上，把中桩加密为5米一个、复核水准点，并每200米增设临时水准点一个。 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
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（四）、施工质量管理与检测
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1、质量标准。根据国内外SMA质量管理经验，结合钢桥面铺装实际情况制定如下标准：X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
类别 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË | 检测指标 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË | 质量要求 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË | 检测频率 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË |
混 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË 合 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË 料 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË | 施工温度 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË | 出料温度180～210℃ X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË 摊铺温度170～190℃ X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË 碾压起始温度165～180℃ X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË | 一次每车 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË |
集料级配 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË | 通过下列筛孔百分率与设计值允 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË 许偏差（每段试样平均值） X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË ≥9.5mm ±5% X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË ≤4.75mm ±3% X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË 0.075mm ±1.5% X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË | 每层每施工段 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË 至少两次 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË |
沥青含量 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË | 与设计值允许偏差 ±0.3% X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË | 同 上 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË |
马歇尔试验空隙率 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË | 铺装上层 3%～5% X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË 铺装下层 2%～4% X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË | 同 上 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË |
饱和度 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË | 70%～90% X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË | X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË |
铺 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË 装 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË 层 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË | 压实度 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË | 桥面钻孔芯样 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË 空隙率：下层3%～6% X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË 上层4%～7% X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË 马歇尔压实度≥95% X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË | 每层每段 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË 至少两次 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË |
构造深度 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË | ≥6.0mm X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË | 每段至少六点 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË |
平整度 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË | ≤5mm X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË 或≤2．5＋1.5б（б为标准差） X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË | 沿车道纵向 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË 连续测量 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË |
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîËX¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
三、几点思考
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîËX¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
本技术方案主要参考厦门海沧大桥钢桥面铺装施工的经验，也借鉴了其它桥梁施工技术方案。海沧大桥桥面铺装层的厚度为65mm，而海河大桥铺装层厚度为60mm，根据欧洲的经验，SMA最小厚度应为混合料集料最大标称尺寸的2.2倍，铺装上层SMA13的适宜厚度为35-45mm我们采用了30mm，主要受总厚度60mm的制约，因为在实际施工过程中铺筑厚度将会有一定的波动，在厚度不足30mm的部位容易出线压实度不足或空隙量大的质量缺陷。X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
钢桥面高粘度改性沥青SMA混合料的施工是一项非常复杂的工艺过程，在这个过程中必须仔细考虑到每一个施工环节中将会遇到的困难，否则在施工中都会遇到问题。 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
由于我国还缺乏钢桥面铺装改性沥青SMA混合料施工成功的经验，所以我们只能根据现有的施工经验进行设计、施工，其质量如何，还要等待时间来检验。X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
参考文献：
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîËX¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
① 余叔藩．沥青玛蹄脂碎石（SMA）混合料的设计与铺筑．1999 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
② 交通部重庆公路科学研究所．厦门海沧大桥桥面铺装工程．1999 X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË
③ 交通部重庆公路科学研究所．武汉白沙洲大桥钢桥面铺装设计方案．1999 [/UseMoney]
X¥ÕRïaÃbbs.3c3t.comðP÷¾Ú/IîË %20(2)_1.gif)
