公路施工技术课件

1、公路施工新技术2004年12月公路施工新技术2004年12月公路施工技术课件公路施工技术课件公路施工技术课件施工过程施工过程施工过程新技术自检碾压机移动式拌和楼红外线摄影机混合料传送机施工过程新技术自检碾压机公路施工技术课件公路施工技术课件公路施工技术课件公路施工技术课件公路施工技术课件公路施工技术课件不均匀密度的影响同压密不够类似增加剥落与水损减少疲劳寿命增加空隙率1%将至少减少10%的寿命不均匀密度的影响同压密不够类似公路施工技术课件公路施工技术课件公路施工技术课件公路施工技术课件不均匀密度的位置不均匀密度的位置温差超过14C空隙率增加2%温差超过14C材料传递机材料传递机公路施工技术课件

2、材料传递机拌和叶片摊铺之前的再拌和材料传递机摊铺之前的施工工艺自动化计算机技术应用卫星和激光定位技术遥控技术图控技术机器眼技术动态反馈和传感技术人机对话技术施工工艺自动化计算机技术应用卫星定位技术卫星定位技术激光定位技术激光定位技术遥控技术遥控技术遥控挖掘装载机遥控挖掘装载机碾压自动化碾压自动化多台碾压机碾压自动化多台碾压机碾压自动化公路施工技术课件机器眼探测裂缝机器眼探测裂缝机器眼安装路面标记机器眼安装路面标记自动封缝机自动封缝机图控技术图控技术人机对话人机对话遥控管涵安装机遥控管涵安装机遥控挖掘装载机遥控挖掘装载机桥梁除漆机器人桥梁除漆机器人自动扫雪洒盐机自动扫雪洒盐机路面新技术超级性能路

3、面玛蹄脂沥青碎石混凝土路面永久路面路面新技术混合料主要特点严格的材料选择旋转压密机和体积比设计 PGAGG% passingsieve size 0.45SGC混合料主要特点严格的材料选择旋转压密机和体积比设计 PGAG沥青性能分级以天气为基础PG 64-22PerformanceGradeAverage 7-daymax pavementdesign tempMin pavementdesign temp沥青性能分级以天气为基础PG 64-22PerformancThe higher theGrade, the stiffer the binder. The more rut resista

4、nce. PG 82PG 76PG 70PG 64PG 58 The lower thenumber, the moreresistant tothermal cracking.PG- 22- 28-34公路施工技术课件集料特性基本特性 要求coarse aggregate angularity (CAA)fine aggregate angularity (FAA)flat, elongated particles (F & E)clay content (SE)来源特性 选择 toughnesssoundnessdeleterious materialspolish values集料特性基

5、本特性 要求1000 .075.3 2.36 4.759.512.5 19.0Percent PassingSieve Size (mm) Raised to 0.45 Power级配1000 .075.3 2.36 4.75控制点1000 .075.3 2.36 4.759.512.5 19.0Percent Passingcontrol pointrestricted zonemax density linemaxsizenommaxsizeSieve Size (mm) Raised to 0.45 Power控制点1000 .075.3 2.36 4.Marshall MethodSF

6、SCBFBCSRMarshall MethodSFSCBFBCSR19.0 mm25.0 mm37.5 mm9.5 mm4.75 mm12.5 mm19.0 mm25.0 mm37.5 mm9.5 mm4.7AGGREGATE GRADATIONNominal Size: 19.0 mm SMA& 19.0 mm SuperpavePercent Passing SMASuperpaveAGGREGATE GRADATIONPercent Pas19.0 mm Superpave19.0 mm SuperpaveInsert I-70I-70 Ndesign - 96 19.0 mm SMAV

7、TM - 4.3Insert I-70I-70 Ndesign - 9AGGREGATE GRADATIONNominal Size: 12.5 mm SMA& 12.5 mm SuperpavePercent PassingSMASuperpaveAGGREGATE GRADATIONPercent PasI-8312.5 mmPG 70-22 BinderI-8312.5 mmFirst 12.5 mm SMAI-68Ndesign - 100 3.9VTMFirst 12.5 mm SMAI-68Ndesign -热压密和紧跟摊铺机!热压密和紧跟摊铺机!特性比较Rut Resistant

8、DurableSkid ResistantReduced SprayReduced HydroplaningReduced SoundSuperpaveSMA特性比较Rut ResistantSuperpaveSMDecision Points for using SMA as the Surface Layer 2000 ESALs per day 55 mphDecision Points 2000 ESALs永久路面路面设计概念永久路面路面设计概念永久路面路面设计概念抗疲劳沥青基层：通过厚度使拉应变最小永久路面路面设计概念抗疲劳沥青基层：通过厚度使拉应变最小永久路面路面设计概念抗车辙上面

9、层集料颗粒摩擦互锁：轧制和粗颗粒沥青胶结料：高温性能和改性空隙率：现场4%-6%永久路面路面设计概念抗车辙上面层集料颗粒摩擦互锁：永久路面路面设计概念抗车辙上面层车辙试验验证现场加速试验永久路面路面设计概念抗车辙上面层车辙试验验证上开裂上开裂华盛顿州永久路面州际高速公路90号47%没有破坏27-33年；路面24公分；第一次罩面12年；第二次罩面13年。华盛顿州永久路面州际高速公路90号厚度比较厚度比较公路施工技术课件公路施工技术课件性能试验性能试验车辙仪车辙仪车辙仪试验结果车辙仪试验结果公路施工技术课件公路施工技术课件公路施工技术课件公路施工技术课件公路施工技术课件公路施工技术课件车辆噪音:e

10、ngine,exhaust system,aerodynamic noise tire noise.For 90 kmph, pavement/tire noise dominates.Power train noiseCoast- by noise路面噪音车辆噪音:Power train noise路面噪音 FHWA - Noise Abatement Criteria 67 dB(A)“this is not an absolute value or design standard, only a level where noise mitigation must be considere

11、d” FHWA - NoiseThe Decibel ScaleHearing ThresholdConversationPain ThresholdDiscomfortThe Decibel ScaleHearing ThresThe Decibel ScaleIncreasing the decibel level by10 doubles the noise intensity!ConversationTrainChain SawThe Decibel ScaleIncreasing th隔音墙和种树Erect Noise Walls or Plant Trees/Shrubs路面微观构

12、造Control Surface Texture防止噪音措施隔音墙和种树防止噪音措施隔音墙Effective only for those in line-of-sight.Do not reduce noise atsource.隔音墙Effective only for those inEffectiveness must justify expense.Cases:I-40, Knoxville: $25,000/homeI-285, Atlanta: Requirements of 69 dB(A) and 67dB(A), 5dB(A)Nationwide (FHWA, 1998):

13、 $1M/mile隔音墙Effectiveness must justify expConclusions, “In general, when dense-graded asphalt and PCC pavements are compared, the dense-graded is quieter by 2 to 3 dB(A)”路面微观构造Conclusions, “In general, when67 dB(A)15 mThe Decibel Scale67 dB(A)15 mThe Decibel ScaleA reduction of 3 dB(A) is like doubl

14、ing the distance from the noise.67 dB(A)30 m- 3 dB(A) = 64 dB(A)A reduction of 3 dB(A) is likeConclusions: “In general, when dense-graded asphalt and PCC pavements are compared,the dense-graded is quieter by 2 to 3 dB(A)”A 3dB(A) reduction corresponds to:- doubling the distance- reducing traffic vol

15、ume by 50%- reducing traffic speed by 25%Conclusions: “In general, wheConclusions: “Open-graded asphalt shows the greatest potential for noise reduction for passby noise. Reduction when compared to dense-graded asphalt ranged from 1 to 9 dB(A).” A 9dB(A) reduction corresponds to:- a reduction in tra

16、ffic noise by almost 50%!Conclusions: “Open-graded aspOGFCsReduce Noise and Improve VisibilityOGFCsReduce Noise and ImproveNoise ReductionOpen vs Dense Graded MixesSource: NCHRP 284Noise ReductionOpen vs Dense DOTs indicate a strong need for pavement noise control strategies.Proper selection of pave

17、ment surface is the best method to reduce noise from pavement/tire interactions.What Can Be Done?DOTs indicate a strong need foOGFC is the quietest surface type. (Wayson, NCHRP Synthesis 268)SMA has also proven to be a quiet surface. (Wisconsin DOT, 1993)Dense graded HMA surfaces are quieter than PC

18、C pavements.(Hibbs and Larson, Report FHWA-SA-96-068, May 1996)Effect of Pavement SurfaceOGFC is the quietest surface tNoise Makes News!Families Near I-275 is lobbying the Michigan DOT forsound abatement. In 1999, MDOT rebuilt I-275 withconcrete. Residents contend the project has increasenoise levels. Levels have been registered upwards of90 decibels.Steve Phillips of Berkshire, England-based TRLLimited spoke about Englands 10-year plan to install quieter surfaces on 60% of main trunk roads.The