What Are The Highway Pavement Disease Radical Cure Method？
1. It is necessary to keep the road surface smooth, solid and clean from time to time. For the deformation of the road surface itself, it is necessary to do a good job of prevention and timely repair, so that the road surface is not damaged or cracked, the quality of the road surface is improved, and the service life is extended. Usually do the following work:
(1) Keep the road surface clean and remove debris, bricks, garbage, feces and other sundries on the road surface in time;
(2) If there are pits, cracks, and edge gnawing on the road surface, maintenance and repair should be carried out in time. If the road surface is seriously damaged, it should be reinforced, overlaid or renovated;
(3) When the slope collapses due to rainwater erosion, it must be repaired in time;
(4) When the road shoulder sinks due to the rolling of vehicles and the trampling of livestock, it shall be repaired by filling in time;
(5) For road sections with side ditches, the side ditches should be kept clean and unimpeded.
2. When muddying occurs on the road surface, there are mainly two radical measures to be taken: "soil replacement method" and "sand pile driving".
(1) Soil replacement method: Due to the perennial erosion of the roadside cultivated land water, the roadbed will be muddy every spring, causing damage to the road surface. As time goes by, the muddying will become more and more serious, resulting in traffic jams and stranded vehicles. In order to solve this situation and restore the road conditions as soon as possible, the "soil replacement method" can be adopted to deal with the muddy subgrade of this road section. Specific construction method: In order not to affect the opening to traffic, first excavate half of the roadbed until the bottom layer of the roadbed is about 1.5 meters deep, and remove all the muddy soil. The 50 cm thick bottom layer is filled with natural gravel with a particle size of less than 5 cm and compacted in layers. The middle 50 cm layer is filled and compacted layer by layer with natural gravel with the next particle size. The top layer of 50 cm thick is mixed with 75% natural gravel and 25% clay, mixed well, filled and compacted in layers, and then asphalt pavement is made on it.
(2) Sand pile driving: The specific method is to dig a pit with a diameter of 50 cm and a depth of 1 meter every 2 square meters in the vertical and horizontal directions of the road surface, and fill the lower layer of the pit with 80 cm thick natural gravel and compact it. The upper 20 cm is made of 80% natural gravel suitable for the graded layer mixed with 20% clay, mixed well, filled and compacted, and then the asphalt pavement can be directly made on it.
3. Treatment of road pits, looseness, cracks, edge gnawing and other diseases. The damaged part of the road surface can be dug out, gravel is placed in the lower part of the roadbed, water is sprinkled, and cold base oil is sprinkled after compaction, asphalt is brushed on the joints, and the asphalt material is mixed and repaired. It is generally divided into two layers, the lower part is 0.5-2.5cm asphalt mixture with a thickness of 2.5-3cm; the upper part is medium-coarse sand and 0.5cm mung bean sand mixture with a thickness of 0.5-0.8cm. After rolling and compacting, it can be opened to traffic.
4. The road bridges and culverts should be maintained irregularly to ensure that the bridges and culverts are smooth and free of weeds. When bridges and culverts are found to be damaged, they should be promptly reported to the competent authority for maintenance. Kilometer steles, curbstones, and bridge railings should be painted twice a year, and damaged and missing signboards should be filled and replaced to ensure that there are obvious and eye-catching road signs.