1.1材料准备

　　1.1 Material Preparation

　　在实际的道路基层冷再生施工作业过程中，主要用到的施工材料有沥青面层铣刨料、水泥和水等等。通常大部分施工单位在选择水泥时，由于考虑到水泥化热问题，所以一般都会采用硅酸盐水泥，或是矿渣硅酸盐水泥等，这是因为此类水泥含有的水泥化热量较少，能够防止施工裂缝的出现。

　　In the actual process of road base cold recycling construction, the main construction materials used include asphalt surface milling materials, cement, water, and so on. Usually, when most construction units choose cement, they usually use Portland cement or slag Portland cement due to consideration of the heat of cement formation. This is because these types of cement contain less heat of cement formation, which can prevent the occurrence of construction cracks.

　　并且，施工单位还要对新入厂的水泥质量进行严格的控制，坚决不允许使用变质的水泥。其次，施工单位还需要确保水泥强度达到了规定标准要求，无论是水泥龄期，还是稳定性，都满足了工程施工要求。而一般水泥初凝时间都在3-5小时左右，的终凝时间大概在6小时。

　　Moreover, the construction unit must strictly control the quality of newly imported cement and strictly prohibit the use of deteriorated cement. Secondly, the construction unit also needs to ensure that the cement strength meets the national standard requirements, whether it is the cement age or stability, it meets the construction requirements of the project. And generally, the initial setting time of cement is around 3-5 hours, and the final setting time is about 6 hours.

　　另外，道路基层冷再生施工工艺对于用水方面有着较高的要求，施工单位应该尽量采用饮用水，或是完全没有毒害物质的纯净水。再者，在对铣刨料选用时，也要确保料粒直径规格的一致，切实结合工程施工需要，选择出合适理想的铣刨料。碎石作为基层混合料中主要的构成材料，应当对其强度、压碎值等当面进行规范要求。

　　In addition, the cold recycling construction technology for road base has high requirements for water use, and the construction unit should try to use drinking water or pure water without any toxic substances as much as possible. Furthermore, when selecting milling materials, it is also necessary to ensure the consistency of particle diameter specifications, and effectively select suitable and ideal milling materials based on the needs of engineering construction. As the main constituent material of the base mix, crushed stone should be subjected to standardized requirements for its strength, crushing value, and other aspects.

　　1.2冷再生混合料配合比设计

　　1.2 Design of Cold Regenerated Mixture Mix Proportion

　　在道路基层冷再生混合料配合比设计中主要包括3个方面，如原材料分析、配合比设计及设计配合比检验。遵循《公路工程路而基层施工技术规范》进行混合料配合比的准确设计，确保施工质量。

　　In the design of the mix proportion of cold recycled mixtures at the base of roads, there are mainly three aspects, such as raw material analysis, mix proportion design, and design mix proportion inspection. Follow the Technical Specification for Construction of Road Base in Highway Engineering to accurately design the mix proportion of the mixture and ensure construction quality.

　　2道路基层冷再生施工工艺的应用

　　Application of Cold Recycling Construction Technology for Road Base Layer

　　冷再生施工技术作为现代公路工程建设中常用的技术手段之一，其施工质量的好坏将会对公路整体稳定性有着直接的影响，为了避免危险隐患的发生，加强做好施工现场质量控制工作，掌握当地地质条件、自然环境情况，制定出规范的施工流程和施工工序，采用的施工技术和施工工艺，从根本上确保公路工程的施工质量。

　　Cold recycling construction technology, as one of the commonly used technical means in modern highway engineering construction, has a direct impact on the overall safety and stability of the highway. In order to avoid the occurrence of hidden dangers, it is necessary to strengthen the quality control of the construction site, grasp the local geological conditions and natural environment, formulate standardized construction processes and procedures, adopt advanced construction technologies and techniques, and fundamentally ensure the construction quality of the highway project.

　　2.1施工放样

　　2.1 Construction layout

　　按照原有路基铣刨过的标高和冷再生混合料底新铺基层的设计标高及经试验段确定的松铺系数，将新铺底基层的摊铺高程计算出来，并进行施工放样作业。

　　Calculate the paving elevation of the newly laid sub base layer based on the elevation milled from the original roadbed, the design elevation of the cold recycled mixture base layer, and the loose paving coefficient determined by the test section, and carry out construction layout operations.

　　2.2路面平整

　　2.2 Road Surface Leveling

　　将原有路面存有的杂物清理干净，将边线也清理干净，同时将再生路段上面的井盖等结构物，将原有路面进行翻浆、车辙、沉陷等病害处理作业，确保原有路面的平整性。

　　Clean up the debris on the original road surface, as well as the edges. At the same time, remove the manhole covers and other structures on the reclaimed road section, and carry out disease treatment operations such as mud turning, rutting, and subsidence on the original road surface to ensure its smoothness.

　　2.3准备新加料

　　2.3 Prepare new ingredients

　　在新料添加量的计算中严格遵循原有路内再生深度的平均密度进行计算。按照每车料的多少进行其堆放距离的确定。在对每稳定层水泥用量计算时，严格遵循水泥剂量要求进行，并对水泥摆放的纵横间距进行确定。

　　Strictly follow the average density of the original regeneration depth in the calculation of the amount of new material added. Determine the stacking distance based on the amount of materials in each vehicle. When calculating the cement dosage for each square meter of stable layer, strictly follow the cement dosage requirements and determine the longitudinal and transverse spacing of cement placement.

　　2.4冷再生拌和

　　2.4 Cold regeneration mixing

　　在原有路面上水车在冷再生机租赁的推动下前行，遵循原有路面损坏情况及再生深度对行驶速度进行适当地调整及控制，通常都会将速度控制在每分钟6到12米，确保铣刨后料的级配不会产生较大的波动，在网裂较为严重的路段，将再生机组的行驶速度进行有效降低，并将铣刨转子的转速进行适量地提升。在再生机行驶中有工作人员跟随在其后面，以便对再生深度进行随时检查，同时还要对水泥含量及混合料的含水量进行检测，调整时，要与再生机工作人员相配合。

　　On the original road surface, the water truck is driven forward by the cold recycling machine rental, and the driving speed is adjusted and controlled appropriately according to the damage of the original road surface and the depth of regeneration. Usually, the speed is controlled at 6 to 12 meters per minute to ensure that the grading of the milled material will not have significant fluctuations. In sections with severe network cracks, the driving speed of the recycling unit is effectively reduced, and the speed of the milling rotor is appropriately increased. During the operation of the regeneration machine, there are staff members following behind to check the depth of regeneration at any time. At the same time, the cement content and water content of the mixture should be detected and adjusted in coordination with the regeneration machine staff.

　　2.5碾压整形

　　2.5 Rolling and shaping

　　再生机施工后初压时，应选用钢轮振动压路机，压实过程中要选用高幅低频压实，压实遍数符合再生层底部2/3厚度范围内的压实度。钢轮压路机行驶速度控制在每小时3千米以下。在完成初压后，整形施工可以选用平地机进行。

　　After the construction of the recycling machine, a steel wheel vibratory roller should be used for initial compaction. During the compaction process, high amplitude and low frequency compaction should be selected, and the number of compaction passes should meet the compaction degree within 2/3 of the thickness range of the bottom of the recycling layer. The driving speed of the steel wheel roller is controlled below 3 kilometers per hour. After completing the initial compaction, the shaping construction can be carried out using a grader.

　　2.6接缝与调头处理

　　2.6 Seam and Turnaround Treatment

　　施工人员在对纵向接缝进行处理的过程中，应该对道路宽度进行合理的设置，若是发生纵向重叠的情况，就要采取全幅施工方法，将重叠量降到很低，同时也可以进一步提高施工效率。并且，施工单位还要对全幅施工与半幅施工的时间差进行有效的控制，不能太久，也不可以太短，需要按照工程施工需求，适当的加大重叠量。另外，在对横向调头进行处理时，应事先对产生的横向接缝进行处理，以免出现停机现象。

　　During the process of treating longitudinal joints, construction personnel should set the road width reasonably. If there is longitudinal overlap, the full width construction method should be adopted to reduce the overlap to a very low level and further improve construction efficiency. Moreover, the construction unit must effectively control the time difference between full width construction and half width construction, which cannot be too long or too short. It is necessary to increase the overlap appropriately according to the construction requirements of the project. In addition, when handling horizontal turns, the resulting horizontal joints should be treated in advance to avoid downtime.

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