旧路的预处治

Pre treatment of old roads

路的沥青混合料路面，交通繁忙，运营多年，存在不同程度、不同种类的病害、病因，如果简单地将其遮盖在水泥之下，用再生机处治，会影响到再生后的整体质量；另外，这也使同样的施工方法不能使所有路段都达到要求的质量标准。这就要求在设计和施工时，根据各路段的不同特点，进行详细的调查和方案调整。

The asphalt mixture pavement of the road is busy with traffic and has been in operation for many years. There are different degrees and types of diseases and causes. If it is simply covered under cement and treated with a recycling machine, it will affect the overall quality of the recycled material; Furthermore, this also prevents the same construction method from achieving the required quality standards for all road sections. This requires detailed investigation and scheme adjustment based on the different characteristics of each road section during design and construction.

再生深度

Regenerative depth

再生后层面的厚度主要取决于再生深度。再生深度太浅，会使再生层的厚度小于设计要求的厚度，层厚是决定路面结构稳定性的重要指标。因此，必须随机钻孔取样检查。如果检测值偏离设计值，应及时调整冷再生机深度，使其达到设计深度要求。

The thickness of the regenerated layer mainly depends on the depth of regeneration. If the regeneration depth is too shallow, it will make the thickness of the regeneration layer less than the design requirement, and the layer thickness is an important indicator that determines the stability of the pavement structure. Therefore, it is necessary to randomly drill holes for sampling and inspection. If the detection value deviates from the design value, the depth of the cold regeneration machine should be adjusted in a timely manner to meet the design depth requirements.

接缝

joint

为了保证全幅路面的再生施工，相邻两个再生幅面的搭接宽度设为20cm.对预先标记在路面上的铣刨标示线进行检查，所有后续再生幅面的宽度少应比铣刨毂的宽度窄15cm.若偏差超过10cm，则应立即倒退开始出现偏差的地方，然后沿着正确的铣刨标示线重新施工。施工中，应尽量减少停机现象。纵向接缝的位置应尽量避开行车道上车辆行驶的轮迹。

In order to ensure the regeneration construction of the entire road surface, the overlapping width of two adjacent regeneration surfaces is set to 20cm. The milling marking line pre marked on the road surface should be checked, and the width of all subsequent regeneration surfaces should be at least 15cm narrower than the width of the milling hub. If the deviation exceeds 10cm, it should be immediately reversed to the point where the deviation began, and then reconstructed along the correct milling marking line. During construction, downtime should be minimized as much as possible. The position of the longitudinal joint should try to avoid the wheel tracks of vehicles on the lane as much as possible.

路面标高

Road surface elevation

现场冷再生层作为路面基层时，路面标高一般比旧路提高8～10cm，作为路面底基层时，路面标高一般比旧路提高23～28cm，由此引起的主要问题有：与结构物的衔接问题；与旧路接头的接顺问题；过村路段的排水问题。

When the on-site cold recycled layer is used as the base layer of the road surface, the road surface elevation is generally 8-10cm higher than the old road. When it is used as the sub base layer of the road surface, the road surface elevation is generally 23-28cm higher than the old road. The main problems caused by this include: connection with the structure; Connection issues with old road joints; Drainage issues on the village road section.

压实度

Compaction degree

施工过程中采用灌砂法测定压实度，对没有达到设计要求的路段及时补压，终达到设计要求。经检测，压实度均能达到98%以上，符合规范要求。

During the construction process, the sand filling method is used to measure the compaction degree. For sections that do not meet the design requirements, timely compaction is carried out to ultimately meet the design requirements. After testing, the compaction degree can reach over 98%, which meets the specification requirements.

弯沉检测

Deflection detection

对冷再生基层进行了弯沉检测，试验结果如下表。冷再生基层养生完成后，弯沉均值为27，标准差为6.38，说明弯沉值符合高等级公路半刚性基层的要求。因此，实测结果符合路面基层技术要求。

The deflection test was conducted on the cold recycled base layer, and the test results are shown in the table below. After the completion of cold regeneration base layer health preservation, the average deflection is 27, with a standard deviation of 6.38, indicating that the deflection value meets the requirements of semi-rigid base layer for high-grade highways. Therefore, the measured results meet the technical requirements of the pavement base layer.

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