Search

CN-122013625-A - Quick construction method for hardened pavement of rural road

CN122013625ACN 122013625 ACN122013625 ACN 122013625ACN-122013625-A

Abstract

The invention relates to the technical field of road engineering, in particular to a rapid rural road hardened pavement construction method which comprises the following steps of S1, pretreatment of junked tires and grid unit manufacture, S2, roadbed treatment and leveling layer construction, S3, on-site paving of a composite flexible stress release layer, S4, factory production of precast concrete panels, S5, on-site assembly and paving of precast slabs, S6, joint treatment and surface sealing, and S7, maintenance and traffic opening. The four-stage anti-sedimentation structure system for roadbed punctiform reinforcement, geogrid reinforcement, rubber grid stress release and prefabricated plate bottom anchorage is innovatively built, each structure layer performs its own role and cooperatively resists deformation, so that the adaptability of the road to uneven sedimentation is improved, the stubborn diseases of the conventional rural road, such as easy breaking, cracking and sedimentation, are thoroughly solved from the structural design, and the service life of the road is prolonged.

Inventors

  • ZHOU SHENGYAN
  • LI HUAQING

Assignees

  • 广西腾越建设工程集团有限公司

Dates

Publication Date
20260512
Application Date
20260330

Claims (10)

  1. 1. A rapid rural road hardened pavement construction method is characterized by comprising the following steps: s1, pretreatment of junked tires and grid unit manufacturing, namely sequentially completing junked tire sorting and cutting, rubber strip surface activation treatment and grid sheet braiding molding to prepare flexible stress release grid sheets with elastic buffering and structural stability; S2, roadbed treatment and leveling layer construction, namely sequentially carrying out mechanical compaction and local improvement on the roadbed to be constructed, paving a geotechnical isolation layer, paving a reinforcement layer and constructing a fine leveling layer to form a smooth, stable and deformation-resistant roadbed operation basal plane; S3, paving and fixing the composite flexible stress release grid sheet on site, filling and compacting a first layer of aggregate, filling and compacting a second layer of aggregate, and spraying transparent oil to form a rubber skeleton and crushed stone filled composite flexible stress release layer; s4, carrying out factory production of the precast concrete panel, namely sequentially carrying out high-precision steel mould preparation, double-layer reinforcing steel mesh installation, high-grade concrete pouring and vibrating, standardized maintenance, demoulding and finished product stacking to obtain the precast concrete panel with the hemispherical anchoring bulge and the hyperboloid lap joint structure; S5, on-site assembly and laying of the precast slabs, accurate laying-out, anchoring laying of the precast slabs, dynamic adjustment of road surface flatness and standardized control of slab joints are sequentially completed, and assembly of a main road surface structure is completed; S6, seam treatment and surface sealing are sequentially carried out, such as seam impurity removal, interfacial agent brushing, modified sealant layered pouring, crack-resistant joint riding paving and road surface integral waterproof spraying are carried out, and a multilayer waterproof crack-resistant system is constructed; and S7, curing and opening traffic, namely sequentially completing initial closed curing after construction, checking the quality of various indexes of the pavement, and formally opening traffic after the quality is checked to be qualified.
  2. 2. The construction method of the rapid rural road hardened pavement according to claim 1, wherein the step S1 is characterized in that waste tires are sorted and cut into broken tires with severely exposed bead wires, perforated tire bodies and crack depths larger than 2cm, a numerical control tire cutting device is adopted to cut the tread of the qualified tire into rubber strips with widths of 3-8cm and lengths of 15-30cm, the rubber strips are subjected to surface activation treatment, namely the rubber strips are completely immersed in silane coupling agent solution for 20-40 minutes, and the rubber strips are naturally dried in a ventilated shade place after being taken out, and the drying time is not less than 12 hours.
  3. 3. The construction method of the rapid rural road hardened pavement according to claim 1, wherein the grid sheet is woven and molded in the step S1, high-strength polyester fiber ropes are adopted as weaving ribs, the activated rubber strips are subjected to warp-weft cross weaving, prestress of 0.5-1.0MPa is applied to the rubber strips in the weaving process to keep the rubber strips in a tensioning state, the grid size of the prepared flexible stress release grid sheet is 8cm multiplied by 8cm to 15cm multiplied by 15cm, the thickness of the flexible stress release grid sheet is 5cm to 10cm, the porosity of the flexible stress release grid sheet is 30% -50%, the specification of the single grid sheet is 2m multiplied by 3m or 1m multiplied by 2m, and the flexible stress release grid sheet is suitable for a site construction work surface.
  4. 4. The construction method of the rapid rural road hardened pavement according to claim 1, wherein in the step S2, road foundation compaction is carried out by adopting 18-20t road rollers, the compaction thickness of each layer is not more than 30cm, broken stone soil is replaced after a soft soil layer of 30-50cm is excavated from a local soft foundation section, the overlap width of a geotechnical isolation layer is 200-400g/m < 2 >, the overlap joint is not less than 20cm, hot melt bonding is adopted at the overlap joint, a reinforced layer is a biaxially oriented plastic geogrid matched with the size of a grid sheet, a fine leveling layer is clean stone chips with the thickness of 3-5cm, leveling is carried out by adopting a scraping bar and a level meter, and the surface flatness is controlled within +/-1 cm.
  5. 5. The construction method of the rapid rural road hardened pavement according to claim 1 is characterized in that in the step S3, a staggered joint paving mode is adopted for paving flexible stress release grid pieces, the overlapping width of adjacent grid pieces is not smaller than 10cm, a high-strength plastic binding belt is adopted for binding each 20cm of overlapping parts, a first layer of aggregate is hard broken stone with the grain size of 2-4cm, the filling thickness is 2/3 of the thickness of the flexible stress release grid pieces, a flat plate vibrator is adopted for vibrating at the frequency of 20-30Hz, a second layer of aggregate is stone chips with the grain size of 0.5-1cm, 10% -20% of primary fly ash is mixed, the second layer of aggregate is filled to be flush with the surface of the flexible stress release grid pieces, the surface is vibrated for 30-60 seconds at the frequency of 25-35Hz, the penetrating layer of oil is slow-crack emulsified asphalt layer oil, the spraying amount is 0.8-1.2kg/m < 2 >, and natural demulsification and solidification are carried out for not less than 4 hours after spraying.
  6. 6. The construction method of the rapid rural road hardened pavement according to claim 1 is characterized in that pits are arranged at the bottom of a high-precision steel die in the step S4, the pits are used for forming hemispherical bulges with the diameter of 3-5cm and the height of 2-3cm, the center distance of the pits is 10-15cm, wavy curved surface forming blocks are arranged on the side edges of the steel die to form a hyperboloid lap joint structure, the diameters of steel bars of double-layer steel bar meshes are 6-8mm, the mesh size is 15cm multiplied by 15cm, the distance between upper and lower layers of the meshes is 5-8cm, the thickness of a protective layer is controlled to be 2.5cm, concrete is dry and hard concrete with the strength grade of C50 or more, slump is controlled to be 3-5cm, and an inserted vibrating rod is matched with a flat vibrator for layered vibrating until the concrete surface is flood, and no bubble exists.
  7. 7. The construction method of the rapid rural road hardened pavement according to claim 1, wherein the curing mode in the step S4 is steam curing, the steam curing is divided into three stages of heating, constant temperature and cooling, the heating rate is less than or equal to 10 ℃ per hour, the temperature in the constant temperature stage is 50-60 ℃, the curing is carried out for 8-12 hours, the cooling rate is less than or equal to 15 ℃ per hour, the concrete strength reaches more than 75% of the design strength during demolding, and the curing is continued until the design strength is reached after demolding.
  8. 8. The construction method of the rapid rural road hardened pavement according to claim 1 is characterized in that in the step S5, a total station is adopted for paving and laying, a road side line, a plate seam control line and an elevation control line are popped up by matching with an ink duct, the elevation error is controlled to be +/-2 mm, a small forklift is adopted for paving and lifting a precast slab, hemispherical bulges at the bottom of the slab are embedded into surface layer pores of a composite flexible stress release layer by 3-5mm to form multi-point anchoring, the flatness is detected by adopting a 3m guiding rule every 2m, the uneven position is leveled by adopting supplementary stone scraps, the maximum deviation is less than or equal to 3mm, the seam width of the adjacent precast slabs is controlled to be 5-8mm, and the fixed point spacing is not more than 50cm.
  9. 9. The construction method of the rapid rural road hardened pavement according to claim 1, wherein in the step S6, clean joints are cleaned by a steel wire brush after being flushed by high-pressure air of 0.5-0.8MPa, so that no floating dust, sundries and water accumulation are caused in the joints, an interface agent is a rubber asphalt interface agent, the coating width is 3-5cm, the coating is uniform and is free from leakage, sealing glue pouring is carried out after surface drying, the sealing glue is a modified rubber asphalt sealing glue, the sealing glue is heated to 160-180 ℃ to be in a flowing state, the sealing glue is poured to be 2-3mm below a board surface for the first time, is cooled and contracted for 30-60 minutes and is secondarily refilled to be flush with the board surface, the crack-resistant paste is a high-performance self-adhesive crack-resistant paste of 1.5-2.0mm thickness, the joint paving width is 10-15cm, the joint is compacted from the center to two sides by a rubber hammer, no empty drum and edge tilting is a nano silane waterproof agent, the water-resistant spraying is carried out, the using amount is 0.2-0.3kg/m2, the second spraying is carried out after the first spraying, and the second spraying is carried out at 30 minutes.
  10. 10. The construction method of the rapid rural road hardened pavement according to claim 1, wherein the initial maintenance and sealing traffic in the step S7 is carried out for 2-4 hours, the sealant is completely cooled and solidified, the waterproof agent fully permeates into the pores of the concrete, the quality inspection comprises road surface flatness, joint compactness, waterproof agent film forming effect and precast slab anchoring firmness, the traffic is opened after all indexes reach standards, the heavy vehicle traffic is limited in the initial stage of the open traffic, and the traffic time is not less than 7 days.

Description

Quick construction method for hardened pavement of rural road Technical Field The invention relates to the technical field of road engineering, in particular to a rapid rural road hardened pavement construction method. Background The construction requirements of the rural road hardened pavement are increasing, and the hardened pavement has the characteristics of dust prevention, water impermeability and durability, so that the hardened pavement becomes a main form of rural road construction, and the rural road is an important carrier for material transportation and mass traveling in rural areas. The traditional construction method of the hardened road surface of the rural road mostly adopts a cast-in-situ concrete road surface or a common precast concrete block paving process, most of roadbeds in rural areas are plain soil roadbeds, the compactness control difficulty is high, soft foundations exist in partial areas, the problems of plate bottom void, road surface broken plates, cracking and subsidence are easy to occur under the action of vehicle load and natural subsidence, and the service life of the road is influenced, so that the design of the construction method of the hardened road surface of the rural road is needed. Disclosure of Invention In order to overcome the defects of the prior art, the invention aims to provide a rapid rural road hardened pavement construction method. The technical scheme adopted by the invention is that the rapid rural road hardened pavement construction method comprises the following steps: s1, pretreatment of junked tires and grid unit manufacturing, namely sequentially completing junked tire sorting and cutting, rubber strip surface activation treatment and grid sheet braiding molding to prepare flexible stress release grid sheets with elastic buffering and structural stability; S2, roadbed treatment and leveling layer construction, namely sequentially carrying out mechanical compaction and local improvement on the roadbed to be constructed, paving a geotechnical isolation layer, paving a reinforcement layer and constructing a fine leveling layer to form a smooth, stable and deformation-resistant roadbed operation basal plane; S3, paving and fixing the composite flexible stress release grid sheet on site, filling and compacting a first layer of aggregate, filling and compacting a second layer of aggregate, and spraying transparent oil to form a rubber skeleton and crushed stone filled composite flexible stress release layer; s4, carrying out factory production of the precast concrete panel, namely sequentially carrying out high-precision steel mould preparation, double-layer reinforcing steel mesh installation, high-grade concrete pouring and vibrating, standardized maintenance, demoulding and finished product stacking to obtain the precast concrete panel with the hemispherical anchoring bulge and the hyperboloid lap joint structure; S5, on-site assembly and laying of the precast slabs, accurate laying-out, anchoring laying of the precast slabs, dynamic adjustment of road surface flatness and standardized control of slab joints are sequentially completed, and assembly of a main road surface structure is completed; S6, seam treatment and surface sealing are sequentially carried out, such as seam impurity removal, interfacial agent brushing, modified sealant layered pouring, crack-resistant joint riding paving and road surface integral waterproof spraying are carried out, and a multilayer waterproof crack-resistant system is constructed; and S7, curing and opening traffic, namely sequentially completing initial closed curing after construction, checking the quality of various indexes of the pavement, and formally opening traffic after the quality is checked to be qualified. As a further description of the above technical solution: The method comprises the steps of S1, sorting and cutting junked tires into broken tires with severely exposed bead wires, perforation of tire bodies and crack depth larger than 2cm, cutting qualified tire treads into rubber strips with widths of 3-8cm and lengths of 15-30cm by adopting numerical control tire cutting equipment, and carrying out surface activation treatment on the rubber strips, wherein the rubber strips are completely immersed in silane coupling agent solution for 20-40 minutes, taken out and naturally dried in a ventilated shade place, and the drying time is not less than 12 hours. As a further description of the above technical solution: The grid sheet is woven and molded in the step S1, high-strength polyester fiber ropes are adopted as weaving ribs, the activated rubber strips are subjected to warp-weft cross weaving, prestress of 0.5-1.0MPa is applied to the rubber strips in the weaving process to enable the rubber strips to be kept in a tensioning state, the grid size of the prepared flexible stress release grid sheet is 8cm multiplied by 8cm to 15cm multiplied by 15cm, the thickness is 5-10cm, the porosity is 30% -50%, the