1.1材料準(zhǔn)備

　　1.1 Material Preparation

　　在實際的道路基層冷再生施工作業(yè)過程中，主要用到的施工材料有瀝青面層銑刨料、水泥和水等等。通常大部分施工單位在選擇水泥時，由于考慮到水泥化熱問題，所以一般都會采用硅酸鹽水泥，或是礦渣硅酸鹽水泥等，這是因為此類水泥含有的水泥化熱量較少，能夠防止施工裂縫的出現(xiàn)。

　　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，施工單位還要對新入廠的水泥質(zhì)量進(jìn)行嚴(yán)格的控制，堅決不允許使用變質(zhì)的水泥。其次，施工單位還需要確保水泥強(qiáng)度達(dá)到了規(guī)定標(biāo)準(zhǔn)要求，無論是水泥齡期，還是穩(wěn)定性，都滿足了工程施工要求。而一般水泥初凝時間都在3-5小時左右，的終凝時間大概在6小時。

　　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，道路基層冷再生施工工藝對于用水方面有著較高的要求，施工單位應(yīng)該盡量采用飲用水，或是完全沒有毒害物質(zhì)的純凈水。再者，在對銑刨料選用時，也要確保料粒直徑規(guī)格的一致，切實結(jié)合工程施工需要，選擇出合適理想的銑刨料。碎石作為基層混合料中主要的構(gòu)成材料，應(yīng)當(dāng)對其強(qiáng)度、壓碎值等當(dāng)面進(jìn)行規(guī)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設(shè)計

　　1.2 Design of Cold Regenerated Mixture Mix Proportion

　　在道路基層冷再生混合料配合比設(shè)計中主要包括3個方面，如原材料分析、配合比設(shè)計及設(shè)計配合比檢驗。遵循《公路工程路而基層施工技術(shù)規(guī)范》進(jìn)行混合料配合比的準(zhǔn)確設(shè)計，確保施工質(zhì)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道路基層冷再生施工工藝的應(yīng)用

　　Application of Cold Recycling Construction Technology for Road Base Layer

　　冷再生施工技術(shù)作為現(xiàn)代公路工程建設(shè)中常用的技術(shù)手段之一，其施工質(zhì)量的好壞將會對公路整體穩(wěn)定性有著直接的影響，為了避免危險隱患的發(fā)生，加強(qiáng)做好施工現(xiàn)場質(zhì)量控制工作，掌握當(dāng)?shù)氐刭|(zhì)條件、自然環(huán)境情況，制定出規(guī)范的施工流程和施工工序，采用的施工技術(shù)和施工工藝，從根本上確保公路工程的施工質(zhì)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施工放樣

　　2.1 Construction layout

　　按照原有路基銑刨過的標(biāo)高和冷再生混合料底新鋪基層的設(shè)計標(biāo)高及經(jīng)試驗段確定的松鋪系數(shù)，將新鋪底基層的攤鋪高程計算出來，并進(jìn)行施工放樣作業(yè)。

　　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

　　將原有路面存有的雜物清理干凈，將邊線也清理干凈，同時將再生路段上面的井蓋等結(jié)構(gòu)物，將原有路面進(jìn)行翻漿、車轍、沉陷等病害處理作業(yè)，確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準(zhǔn)備新加料

　　2.3 Prepare new ingredients

　　在新料添加量的計算中嚴(yán)格遵循原有路內(nèi)再生深度的平均密度進(jìn)行計算。按照每車料的多少進(jìn)行其堆放距離的確定。在對每穩(wěn)定層水泥用量計算時，嚴(yán)格遵循水泥劑量要求進(jìn)行，并對水泥擺放的縱橫間距進(jìn)行確定。

　　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

　　在原有路面上水車在冷再生機(jī)租賃的推動下前行，遵循原有路面損壞情況及再生深度對行駛速度進(jìn)行適當(dāng)?shù)卣{(diào)整及控制，通常都會將速度控制在每分鐘6到12米，確保銑刨后料的級配不會產(chǎn)生較大的波動，在網(wǎng)裂較為嚴(yán)重的路段，將再生機(jī)組的行駛速度進(jìn)行有效降低，并將銑刨轉(zhuǎn)子的轉(zhuǎn)速進(jìn)行適量地提升。在再生機(jī)行駛中有工作人員跟隨在其后面，以便對再生深度進(jìn)行隨時檢查，同時還要對水泥含量及混合料的含水量進(jìn)行檢測，調(diào)整時，要與再生機(jī)工作人員相配合。

　　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碾壓整形

　　2.5 Rolling and shaping

　　再生機(jī)施工后初壓時，應(yīng)選用鋼輪振動壓路機(jī)，壓實過程中要選用高幅低頻壓實，壓實遍數(shù)符合再生層底部2/3厚度范圍內(nèi)的壓實度。鋼輪壓路機(jī)行駛速度控制在每小時3千米以下。在完成初壓后，整形施工可以選用平地機(jī)進(jìn)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接縫與調(diào)頭處理

　　2.6 Seam and Turnaround Treatment

　　施工人員在對縱向接縫進(jìn)行處理的過程中，應(yīng)該對道路寬度進(jìn)行合理的設(shè)置，若是發(fā)生縱向重疊的情況，就要采取全幅施工方法，將重疊量降到很低，同時也可以進(jìn)一步提高施工效率。并且，施工單位還要對全幅施工與半幅施工的時間差進(jìn)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，適當(dāng)?shù)募哟笾丿B量。另外，在對橫向調(diào)頭進(jìn)行處理時，應(yīng)事先對產(chǎn)生的橫向接縫進(jìn)行處理，以免出現(xiàn)停機(jī)現(xiàn)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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