路基施工及濕軟路基的處理-資料下載頁

　　

【正文】 on higher requirements (part of a) must be analyzed and surface or loose loose (local small area, should plement with asphalt concrete disadvantage, appear to consolidate area loose pletely rework processing), Roughness requirements, can not reach the standard of asphalt surface should be in 3 d processed.On the highway surface layer must grasp flatness, up higher standards, and eventually to achieve an ideal possible degree. Before rough surface layer uneven tone, the old mode for upper of flatness requirement high highway is simply won39。t work, so the pavement base can use the harm, should use first, reoccupy voltage crawler tractor mixer, and employing the ping ping, but must exquisitely, control of gravel or water stable macadam mixture mixing method must be used for mixing, paving, so can paver to ensure smooth uniform mixture, and elevation, slope, easy to control the thickness of the index.. The pavementThe strength and pavement roughness will directly affect the quality of asphalt concrete pavement, ignoring the process of examination and acceptance, may cause serious defect layer road results. Therefore must strictly in accordance with the highway asphalt pavement construction technical specification requirements for inspection and acceptance of serious problems.. The strength check before paving asphalt concrete in, can be in the field with deflection, CBR experiment and check on inspection method, If you found a partial area, settlement should be repeated pressure and with good material for replacement. grassroots surface is loose. KengTang, wait for a phenomenon, should handle, otherwise it will produce uneven subsidence, the influence of road roughness, asphalt pavement damage or early.) to strictly control the construction qualityAsphalt pavement construction according to the quality requirements of the overall management, establish and perfect quality assurance system, the actual target management, process management, strict liability in construction process, and each procedure strictly the quality inspection, evaluation, in order to ensure the quality standard. Specific on the following aspects:, strictly control the quality of the asphalt mixture white white, Marshall test frequency, strictly control the mixture of oilstone ratio, stability, flow value index. proper on oil layer, adhesive layer of oil. In each layer of paving, must be kept clean, on top of the cement stable of semirigid base, to slow crack formation of emulsified asphalt advisable. Sprinkle with asphalt, car sprayed cloth maintain stable velocity and enhanced additionally, cannot flow or oil film.. Improve surface quality of paving. In paving mixture, the distance of not too far, paving thickness, paction equipments should form a plete set, paction quantities cannot little, lest mixture, space is too big for materials, especially not below the layer, After dry, wet grassroots cannot paving. Vertical and horizontal seam should closely, smooth, each picture overlapping mixture between using artificial shovel.. Strictly control quality and improve the roller paction effect. Paving asphalt concrete flat, should be timely rolling hot. Rolling process points early, pressure and pressure pressure three stages. Beginning with 6080KN double pressure roller to km/h speed first RCC, mixture twice to preliminary stability. Then with a 100120KN tricycle roller or tire pressure roller after 46 times. Rolling speed: three rollers for 3km/h, Tyre roller for 5km/h. After pressing roller and stability without significant phase of the wheel track. Finally the pressure is 60 after 80KN double roller to 3km/h of rolling speed roller 24 times, in order to eliminate rolling process, and ensure the wheel on the surface of the road. When the roller paction running parallel to the centerline of road direction should be., strictly control the quality of construction joints. All sorts of asphalt concrete pavement construction joints, often due to insufficient pacting, Taiwan, crack, loose disease, affect the pavement roughness and durability, when construction must pay great attention.. Good control of the mixture of gradation and moistureIn order to improve grassroots smoothness and convenient paver, grassroots mixture paving gradation must strictly control, and doing when the mixture ratio design of maximum diameter, the mixture to the proper segregation, thus maximum diameter reduced aggregate gradation, strict control for homework and basic roof surface paver degree. In addition, excessive moisture mixture construction, rolling forming difficulty, and formation of pavement waves and surface wheel, basic roof surface roughness and even cause structure shrinkage crack. To improve the asphalt concrete pavement roughness of surface layer must from the base construction, and improve grabbed the key lies in the superior quality of construction machinery, namely, have good stability and white aggregates of paver rollers.. Asphalt mixing detail controlThe quality of the asphalt mixture mixing effect the quality of the asphalt pavement is one important segment. In the mixing process from the mixture gradation, asphalt mixing temperature and time, etc, in order to improve the prehensive control of the mixture of spread effect, In the process of mixture transportation, to prevent oxidation measures. asphalt mixture transportation and detail controlAsphalt mixture in the transport process, must be fully covered, in order to prevent the asphalt in sunshine, air temperature caused by oxidation of asphalt mixture, and the lower temperature.) check every morning and evening, the condition that the vehicle inspections, brake, and equipment are in good condition.. Check before each partment, transportation, prevent to sweep clean asphalt mixture and bonding, train carriage board can besmear bottom side plate and a thin layer of appropriate isolation (oilwater mixture) may abound in car bottom, fluid reach above requirements, mixing station shall not feeding.. feeding six times a second, namely (and, after the