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水泥就地冷再生技术施工

来源:https://www.sddhfjx.com/ 日期:2022-07-08
一、全深式水泥就地冷再生技术原理
1、 Principle of full depth cement in situ cold regeneration technology
就地冷再生是指充分利用现有沥青道路旧铺层材料(面层与基层),根据对混合料性能的要求,加入部分新骨料,并按设计加入一定量的水泥,在自然环境温度下连续地完成材料的铣刨、破碎、拌合、摊铺及压实成型,从而修筑出具有所需性能质量的新基层的作业过程。
In situ cold recycling refers to the operation process of making full use of the old paving materials (surface course and base course) of the existing asphalt road, adding some new aggregate according to the requirements of the mixture performance, and adding a certain amount of cement according to the design, and continuously completing the milling, crushing, mixing, paving and compaction of the materials at the natural ambient temperature, so as to build a new base course with the required performance quality.
二、施工工艺
2、 Construction technology
以G312线K2634段道路的养护维修中应用的冷再生基层为例,阐述全深式水泥就地冷再生施工工艺,利用现有沥青道路旧铺层材料(面层与基层),根据对混合料性能的要求,并按设计要求加入不小于5%的水泥,在自然环境温度下连续地完成材料的铣刨、破碎、拌和、摊铺及压实成型,从而修筑出具有所需性能质量的新基层的作业过程。
Taking the cold recycled base course applied in the maintenance of k2634 section of G312 line as an example, this paper expounds the full depth cement in-situ cold recycled construction technology, using the existing asphalt road old paving materials (surface course and base course), according to the requirements of mixture performance, and according to the design requirements, adding no less than 5% of cement, the material can be milled, crushed, mixed, paved, compacted and shaped continuously under the natural ambient temperature, So as to build a new base with the required performance and quality.
1、维特根就地冷再生机工作宽度:2500mm
1. Working width of wittgen local cold regenerator: 2500mm
工作深度:500mm发动机功率:315kw/500kw工作重量:ca.23t/32t
Working depth: 500mm engine power: 315kw/500kw working weight: ca 23t/32t  
2、罐车是再生机的配套设备,用来供水或者液体稳定剂。罐车的容量要与日工程量和道路现状匹配。方案为:固定一台水罐车与再生机连接,另外一台或者多台水罐车配备水泵为固定水罐车补充水,补充水的水罐车数量取决于水消耗速度和水源远近,以实现工作效率。
2. Tank car is the supporting equipment of regeneration machine, which is used for water supply or liquid stabilizer. The capacity of the tank car should match the daily work quantity and the current situation of the road. The scheme is as follows: a fixed water tanker is connected to the regenerator, and another one or more water tankers are equipped with water pumps to make up water for the fixed water tanker. The number of water tankers to make up water depends on the water consumption speed and the distance of the water source, so as to achieve work efficiency.
3、压实设备
3. Compaction equipment
在应用WR2000就地冷再生机施工过程中使用一台22吨单钢轮压路机进行压实。
In the construction process of applying wr2000 local cold recycling machine, a 22 ton single steel wheel roller is used for compaction.
4、平地机
4. Grader
由于WR2000是轮胎式就地冷再生机,所以在施工过程中为了达到控制平整度和标高的要求,配备一台平地机。
As wr2000 is a tire type local cold regenerator, a grader is equipped to meet the requirements of flatness and elevation control during construction.
5、洒水车
5. Sprinkler
养生方法采用洒水养生的方式进行养生,配备洒水车一台。
The curing method adopts watering for curing, and a sprinkler is equipped.
6、胶轮压路机
6. Rubber tyred roller
胶轮压路机主要是对再生层表面进行揉搓,尽量让表面密实,减少水对再生层的不利影响,配备了一台喷水功能完好的胶轮压路机,自重为31吨。
The rubber tyred roller mainly rubs the surface of the regenerative layer to make the surface as dense as possible and reduce the adverse impact of water on the regenerative layer. It is equipped with a rubber tyred roller with good water spraying function, with a self weight of 31 tons.
7、准备工作
7. Preparatory work
冷再生租赁机和配套设备准备完毕即具备施工条件,在正式施工之前还要对冷再生机组进行下面要求的准备工作:
The cold regeneration rental machine and supporting equipment are ready for construction. Before the formal construction, the cold regeneration unit must be prepared as follows:
(1)对冷再生施工中所需要的所有机械设备进行全面的功能检查;
(1) Conduct a comprehensive functional inspection of all mechanical equipment required in the cold regeneration construction;
(2)连接所有与冷再生机相连的管路,排出喷洒系统中的空气并确保所有阀门均处于工作状态;
(2) Connect all pipelines connected to the cold regenerator, discharge the air in the spraying system and ensure that all valves are in working condition;
(3)检查冷再生租赁机操作人员是否将稳定剂添加量有关的数据输入微机。
(3) Check whether the operator of the cold regeneration rental machine inputs the data related to the amount of stabilizer into the computer.
8、原材料试验
8. Raw material test
水泥稳定冷再生层施工前,对原路面进行了配合比设计。利用WR2000就地冷再生机在原旧路上铣刨有代表性的样品。
Before the construction of cement stabilized cold recycling layer, the mix proportion of the original pavement is designed. Use wr2000 local cold regeneration machine to mill representative samples on the original road.
9、试验段施工
9. Construction of test section
(1)根据经验和所用冷再生机械的特点,按6m/min再生机行进速度和转子速度的组合方案对旧路进行铣刨,取铣刨后具有代表性的材料送往试验室进行筛分,级配已接近理想级配。
(1) According to the experience and the characteristics of the cold recycling machinery used, the old road is milled according to the combination scheme of 6m/min recycling machine travel speed and rotor speed. After milling, the representative materials are sent to the laboratory for screening, and the grading is close to the ideal grading.
(2)按照室内试验结果,在旧路上摊铺新加料或填料,但不添加稳定剂,按(1)确定的方案进行铣刨,取铣刨后具有代表性的材料样品送往实验室进行筛分,如果筛分后的级配与室内设计级配超过允许波动范围,应调整再生机速度和转子速度,使铣刨后的级配与室内设计级配相比波动在允许范围内。
(2) According to the indoor test results, pave the newly added materials or fillers on the old road without adding stabilizers, milling according to the scheme determined in (1), take representative material samples after milling and send them to the laboratory for screening. If the screened gradation and indoor design gradation exceed the allowable fluctuation range, adjust the speed of the regenerator and the rotor speed, Make the grading after milling fluctuate within the allowable range compared with the indoor design grading.
(3)根据稳定剂类型,采用1~3种压实方案进行施工(包括压路机吨位、碾压顺序、遍数等),以确定为合理的碾压方案。
(3) According to the type of stabilizer, 1 ~ 3 compaction schemes are adopted for construction (including roller tonnage, rolling sequence, times, etc.) to determine a reasonable rolling scheme.
(4)取冷再生机经铣刨、拌和后的混合料,送往试验室,对以水泥作为稳定剂的冷再生,测定冷再生混合料的含水量、水泥量,并按公路工程无机结合料稳定材料试验规程要求成型试件,测定其7d无侧限抗压强度。
(4) Take the mixture milled and mixed by the cold recycling machine and send it to the laboratory. For the cold recycling with cement as stabilizer, measure the water content and cement content of the cold recycled mixture, and form the test piece according to the requirements of the test procedures for inorganic binder stabilized materials in highway engineering, and measure its 7d unconfined compressive strength.
(5)对试验段的弯沉、压实度、平整度、厚度、宽度等指标进行检测。
(5) The deflection, compactness, flatness, thickness, width and other indicators of the test section shall be tested.
根据试验段的结果终确定冷再生混合料的级配、施工时采用的再生机行进速度、转子速度及再生结构压实工艺。
According to the results of the test section, the gradation of the cold recycled mixture, the traveling speed of the regenerator, the rotor speed and the compaction process of the recycled structure used in the construction are finally determined.
水泥稳定就地冷再生工艺流程
Process flow of cement stabilized in situ cold regeneration
10、对原道路进行预整形
10. Pre shaping the original road
按设计对原道路局部隆起或凹陷处进行处理,达到设计要求。
The local uplift or depression of the original road shall be treated according to the design to meet the design requirements.
11、计算材料用量:
11. Calculate material consumption:
(1)根据原道路再生深度内的平均密度,计算每平米新料的添加量。
(1) According to the average density within the regeneration depth of the original road, calculate the amount of new material added per square meter.
(2)根据每车料的质量或体积,计算每车料的堆放距离。
(2) Calculate the stacking distance of each truck according to the mass or volume of each truck.
(3)采用人工摆放和摊铺水泥,应根据水泥用量3.9%,计算每平方米水泥稳定层需要的水泥用量17.4kg,确定水泥摆放的纵横间距。
(3) For manual placement and paving of cement, the cement consumption of 17.4kg per square meter of cement stabilized layer shall be calculated according to the cement consumption of 3.9%, and the vertical and horizontal spacing of cement placement shall be determined.
12、冷再生机行进速度应根据路面损坏状况和冷再生深度进行调整,一般为5m/min~7m/min,使得铣刨后料的级配波动范围不大。应根据道路两侧设置的水平控制桩,定期核查再生深度是否正确,如冷再生深度超过设计深度±1cm,应查明原因后再继续施工。冷再生机后应有专人进行质量控制,随时检查再生深度、水泥含量和含水量,并配合再生机操作员进行调整。
12. The travel speed of the cold recycling machine should be adjusted according to the damage condition of the pavement and the depth of cold recycling, which is generally 5m/min ~ 7m/min, so that the grading fluctuation range of the milled material is small. According to the horizontal control piles set on both sides of the road, regularly check whether the regeneration depth is correct. If the cold regeneration depth exceeds the design depth by ± 1cm, the reason should be found out before continuing the construction. After the cold regenerator, special personnel shall be assigned to carry out quality control, check the regeneration depth, cement content and water content at any time, and cooperate with the regenerator operator to adjust.
13、碾压整形
13. Rolling and shaping
(1)根据路宽、压路机的轮宽和轮距的不同,制订碾压方案,应使各部分碾压到的次数尽量相同,路面的两侧应多压2~3遍。
(1) According to the road width, the wheel width and wheel spacing of the roller, the rolling scheme shall be formulated, and the rolling times of each part shall be the same as far as possible, and the two sides of the pavement shall be rolled for 2 ~ 3 times.
(2)在冷再生机后应配备一台大吨位单钢轮振动压路机进行初压。初压时先让压路机紧跟再生机后面进行一遍静压,静压后采用强振(高幅低频)进行压实,压实遍数应足以保证再生层底部2/3厚度范围内的压实度达到规定要求。
(2) After the cold regeneration, a large tonnage single drum vibratory roller shall be equipped for initial compaction. During initial compaction, let the roller closely follow the regenerator for one time of static pressure, and then use strong vibration (high amplitude and low frequency) for compaction. The number of compaction times should be enough to ensure that the compactness within the thickness range of 2/3 at the bottom of the regeneration layer meets the specified requirements.
(3)在完成一个作业段的冷再生和初压后,应立即用平地机整形。在直线段,平地机由两侧向路中心进行刮平;在平曲线段,平地机由内侧向外侧进行刮平。
(3) After completing the cold regeneration and initial pressure of an operation section, it should be reshaped with a grader immediately. In the straight section, the grader scrapes from both sides to the center of the road; In the flat curve section, the grader scrapes from the inside to the outside.
(4)在整形前,如果冷再生材料表面水分散失比较严重,可以先洒水后用平地机整形。
(4) Before reshaping, if the water loss on the surface of the cold recycled material is relatively serious, it can be watered first and then reshaped with a grader.
(5)整形后,应立即用单钢轮振动压路机以弱振(低幅高频)进行复压。直线和不设超高的平曲线段,由路肩向路中心碾时,每次应重叠1/2轮宽,压完路面全宽时即为一遍。一般需碾压4~6遍。压路机的碾压速度,头两遍以采用1.5~1.7km/h为宜,以后宜采用2.0~2.5km/h。
(5) After reshaping, the single drum vibratory roller shall be immediately used for re compaction with weak vibration (low amplitude and high frequency). When the straight line and the flat curve section without superelevation are rolled from the shoulder to the center of the road, 1/2 of the wheel width shall be overlapped each time, and it is one time when the full width of the road surface is pressed. Generally, it needs to be rolled for 4 ~ 6 times. The rolling speed of the roller should be 1.5 ~ 1.7km/h for the first two passes, and 2.0 ~ 2.5km/h for the future.
(6)用胶轮压路机进行终压,必要时可洒水碾压。
(6) The rubber tyred roller shall be used for final compaction, and watering and rolling can be carried out when necessary.
以上就是为大家介绍的有关冷再生机租赁的详细的介绍,希望对您有所帮助.如果您有什么疑问的话,欢迎联系我们.我们将以专业的态度,为您提供服务https://www.sddhfjx.com
The above is a detailed introduction about the rental of cold regenerator, which I hope will help you. If you have any questions, please contact us. We will provide services for you with a professional attitude https://www.sddhfjx.com
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