CN-122013630-A - Method for treating diseases of old airport pavement in high-heat area

Abstract

A method for treating the diseases of old airport pavement in high-heat area includes such steps as S1, evaluating and classifying the diseases, S2, planning the scheme, S3, refractory composite surface treatment, and S4, reinforcing interface and optimizing drainage. The application determines the type and severity of the road surface diseases by evaluating and classifying the diseases, determines the treatment scheme according to the type and severity, and repairs the local structure according to the treatment scheme.

Inventors

• LIU FEILONG
• LIU YU
• ZHOU YUQI
• LIU WEIWEI
• ZHOU LE
• PAN HONGYU
• LI JIYANG
• LI YONGSHENG
• LUO YIXIONG
• HU HAILONG

Assignees

• 中建一局集团建设发展有限公司

Dates

Publication Date

20260512

Application Date

20251218

Claims (6)

1. 1. A method for treating diseases of old airport roads in high-heat areas is characterized by comprising the following steps: s1, disease evaluation and classification treatment, namely identifying the type of the pavement disease through on-site investigation, radar detection and ultrasonic detection, and classifying the pavement disease types into a crack fracture plate type, a seam type, a pavement plate vertical displacement type and a surface layer type according to measurement statistics results; S2, planning a treatment scheme according to the type of the pavement diseases, wherein the treatment scheme specifically comprises a crack broken plate disease treatment countermeasure, a joint disease treatment countermeasure, a pavement plate vertical displacement disease treatment countermeasure and a surface layer disease treatment countermeasure, and specific diseases are treated through specific technical schemes of a joint or crack filling process, a pavement plate partial thickness repairing process, a panel full thickness repairing process, a foundation grouting process and a plate grinding process; S3, high-temperature resistant composite cover surface treatment, namely paving a modified asphalt concrete cover surface on the repaired road surface, and doping a high-temperature stabilizer to enhance the high-temperature resistance; S4, interface reinforcement and drainage optimization, namely adopting an interface bonding material to improve the bonding force between the old pavement and the new pavement, avoiding the separation of the interface layer, optimizing a field pavement drainage system, adjusting the gradient, adding a drainage groove and reducing the damage of rainwater retention to the pavement.
2. 2. The method for treating the old airport pavement diseases in the high-heat area according to claim 1, wherein the countermeasures for treating the crack-breaking plate diseases comprise full-thickness repair, partial-thickness repair or crack filling type repair; In the full-thickness repair, a plurality of longitudinal, transverse or oblique cracks exist on a single plate, when the length of a single crack exceeds half of the length of the short side of the plate, and the average width of one crack is more than 10mm, the plate is replaced integrally, and an original dowel bar or a pull rod is restored in the plate restoring process; In the partial thickness repair, the plate blocks around the crack have no obvious dislocation, but when the plate blocks in the crack influence area are peeled off seriously, the partial thickness repair is carried out on the plate blocks, the repair depth is half of the thickness of the plate blocks, and the connection between the repair blocks and the original pavement is enhanced by arranging connecting nails; In the crack filling process, no cross exists between the cracks, no obvious dislocation exists on two sides of the cracks, the average width of the cracks is smaller than 5mm, and when the periphery is not obviously peeled off, the cracks are repaired through the crack filling process.
3. 3. The method for treating an old airport pavement disease in a high-heat area according to claim 1, wherein: The blocks of the paved concrete plates are completely consistent with the blocks of the old plates, the joints of the upper plate and the lower plate are aligned, and when the joint is occasionally staggered, the error is not more than 30mm; When the abnormal plate appears on the old road panel and the concrete slab to be paved cannot be consistent with the original road panel, the joint is cut on the original road surface according to the block size of the plate after being paved, and then the joint is poured by adopting joint pouring materials, and the joint of the old road panel is covered by adopting asphalt felt and then is poured by adopting capping concrete at the position where the concrete of the old road surface of the abnormal plate is blocked but the capping layer does not need to be blocked.
4. 4. The method for treating the old airport pavement diseases in the high-heat area according to claim 1, wherein in the countermeasure for treating the pavement slab vertical displacement type diseases: Mud pumping and board bottom void, namely adopting basic grouting and replacing the joint filling material at the joint, sinking or staggering, namely adopting the following treatment countermeasures according to the staggering amount or the magnitude of the sinking amount: when the dislocation amount or the subsidence amount is less than 5mm, replacing the crack pouring material at the joint of the dislocation or subsidence plate; When the dislocation amount or the subsidence amount is 5-10 mm, adopting a plate grinding method to eliminate dislocation When the dislocation amount or subsidence amount, namely the height difference H between the sinking plate (1) and the adjacent plate (2) is more than 10 mm, adopting partial thickness repair, wherein the repair depth is 5-10 cm, the repair width is determined by calculating the height difference H, and the repair surface gradient i is not more than 1%; specifically, a sinking plate (1) and an adjacent plate (2) are cut into repair spaces with the width of 100H, concrete is poured into the repair spaces to form repair blocks (3), the gradient i of repair surfaces of the repair blocks (3) is not more than 1%, and joint filling materials (4) are filled in the upper parts of the repair blocks (3) and the adjacent plate (2); The plate is arched, the seam at the arched position is cut in full thickness, the cutting width is 3-5 cm, fragments in the seam are cleaned, and after the stress is fully released, the crack filling material is replaced.
5. 5. The method for treating the old airport pavement diseases in the high-heat area according to claim 1, wherein the method comprises the following steps: the repair process for the thickness of the road panel part comprises the following steps: 1) Determining patch repair sizes; The minimum repair depth is 5cm, the maximum repair depth is half of the plate thickness, and the dowel bar and the pull rod cannot be damaged, the maximum side length of the patch is not more than 2m, and the minimum side length is not less than 0.15m; the repair range extends outwards for 5-10 cm from the disease influence area, the patch is in a regular rectangle shape with the length-width ratio smaller than 2:1, the patch with irregular plane size or with the length-width ratio larger than 2:1 is repaired for multiple times, each patch can meet the size requirement, the patch can also be repaired once, cut in time after casting, and the cut patch meets the requirement with the length-width ratio smaller than 2:1, and the joint is sealed at the joint seam; Repairing the adjacent two blocks when the interval between the two adjacent blocks is smaller than 30 cm, and adopting effective isolation measures at the joint positions when the blocks span the joint; 2) Road panel cutting The boundary line is drawn according to the repairing range, the pavement joint cutter is cut along the drawn line, the cutting depth is the same as the patch depth as much as possible, the minimum cutting depth is not less than 5cm, and in order to reduce the influence of pavement breaking on the peripheral intact plate, the concrete in the repairing range is cut in a grid shape after the boundary cutting, the cutting method is as follows Firstly, cutting slits along the long side direction of the patch, wherein the distance is 2-6 cm, and the depth is 5cm; cutting two slits at a position 4 cm a away from the repair boundary along the short side direction, wherein the cutting depth is 5 cm; 3) The pavement is crushed, cement concrete in the repairing range is crushed from the center to the periphery, and full-thickness repairing is adopted when the crushing depth exceeds half of the plate thickness; The boundary line is drawn according to the repairing range, the pavement joint cutter cuts along the drawn line, the cutting depth is the same as the patch depth as much as possible, the minimum cutting depth is not smaller than 5cm, and in order to reduce the influence of pavement breaking on the peripheral intact plate, the concrete in the repairing range is cut in a grid shape after the boundary cutting, the cutting method is as follows: firstly, cutting slits along the long side direction of the patch, wherein the distance is 2-6 cm, and the depth is 5cm; cutting two slits at a position 4 cm a away from the repair boundary along the short side direction, wherein the cutting depth is 5 cm; 4) Pit cleaning When the patch is positioned at the edge or corner of the board, the joint adjacent to the patch is treated, and the joint is crushed and cleaned, and the joint filling material and the backing strip in the joint are removed; 5) Mixing and pouring concrete The concrete mixing, namely, after the dosage of the repairing concrete is estimated, the dosage of cement, aggregate, additive and water is calculated, and the weighing is accurate; The concrete pouring is performed, namely the cleaning of the pit is ensured, the wall of the pit cannot be stuck with more dust, the periphery and the bottom of the pit are wetted, but no water accumulation exists, the concrete pouring is performed once, the concrete pouring is performed along one direction when the area is large, a buckling shovel is adopted for pushing and paving during manual pouring, and the throwing is forbidden; The concrete is vibrated, namely the vibration at the same position is not less than 10 seconds, the concrete stops falling and does not foam and flood the slurry, the moving distance of the vibrating equipment is not more than 1.5 times of the acting radius of the vibrating equipment, and the two vibrating positions are overlapped by 10-20 cm; 6) Leveling and dough making Sprinkling water or roughening on the concrete surface when strictly forbidden to finish the surface, firstly, leveling by using a long plate, then, plastering plastic and iron, wherein the plastering times are not less than three times, and the flow is as follows: The first plastering is smoothed back and forth along the transverse slope direction, and the front plastering and the rear plastering are overlapped by 1/2, so that the plastering is mainly used for kneading and grouting, pressing down exposed stones, eliminating obvious concave-convex phenomenon and accelerating the evaporation of water; the water is slightly evaporated and then is smeared for the second time along the transverse slope direction, and the method is mainly used for extruding bubbles, pressing sand into the board surface, eliminating sand holes and compacting the board surface; the last plastering is used for eliminating various uneven marks remained on the board surface and accelerating the evaporation of the water on the board surface; 7) Napping The roughening time is early and not late, the surface of the concrete can be slightly pressed by an index finger, and the roughening can be performed when the concrete has certain strength but is not completely hard; the average grain depth of the surface after roughening is larger than 0.4 mm, and the cement paste adhered on a roughening tool is not required to be cleaned frequently by water in the roughening process because of the phenomena of flanging and loosening of the roughening; 8) Curing After roughening, before the initial setting of the concrete, spraying a curing agent for moisture preservation and curing, wherein the curing period is not less than 7 days.
6. 6. The method for treating the old airport pavement diseases in the high-heat area according to claim 1, wherein the method comprises the following steps: The full-thickness repair process of the panel comprises the following steps: 1) Patch (5) patch size The shortest side length of the patch (5) is not smaller than 60cm, the repair range extends outwards from the disease influence area to 5-10 cm, the patch is full-thickness, the patch (5) is regular rectangular, and the length-width ratio is smaller than 2:1; The elongated strip patch with the length-width ratio of more than 2:1 is repaired in a blocking way according to the requirement of the length-width ratio of 2:1, and a pull rod (8) is additionally arranged between adjacent patches; repairing the two adjacent damaged positions when the distance between the two adjacent damaged positions is smaller than 60 cm; The patch (5) is repaired along the joint when crossing the joint; 2) Panel cutting Cutting along the repair boundary by using a cutting machine, wherein the deeper the cutting depth is, the better the cutting depth is, and the minimum depth is not less than 10 cm; 3) Panel crushing Breaking hammer for large plate block, pneumatic pick for small plate block, protecting corner position of block, and cutting off original dowel bar (6), original pull bar (7) and reinforcing steel bar net; 4) Base layer treatment 5) Additional pull rod The patch area is larger, namely when the long side is larger than 2m and the short side is larger than 1m, an additional pull rod (8) is arranged between the patch and an adjacent plate of the original pavement, the additional pull rod (8) adopts a twisted steel bar, the length is 70cm, the diameter can be 14 or 16, the patch is additionally arranged in the center of the plate thickness, and rust prevention treatment is carried out; The tie rods (8) are arranged at equal intervals, the interval is 50 cm, and the minimum embedded depth of one side is 30cm; the distance between the outermost side of the tie rod (8) and the patch boundary or the road surface joint is 25-35 cm; After installation, the deviation of the upper and lower sides and the left and right sides of the two ends of the additional pull rod (8) is smaller than 20mm; 6) Reinforcing steel bar net arrangement The bending tensile strength of the patch is improved by arranging the reinforcing steel mesh, and the reinforcing steel mesh can be provided with a single layer or a double layer: the steel bars are arranged in a plate thickness range of 1/3-1/2 below the upper surface of the plate, or are arranged by adopting a double-layer steel bar net; The thickness of the reinforcement protection layer is not less than 5cm, wherein the distance between the outermost reinforcement and the edge of the patch is about 10 cm; the longitudinal and transverse steel bars have the same diameter, if the difference is different and is not more than 0.4 cm, the minimum clear distance of the steel bars is not less than 2 times of the maximum grain diameter of the aggregate; Under the condition of meeting the requirement of the spacing between the steel bars, adopting the steel bars with smaller diameters, wherein the minimum diameter and the maximum spacing of the steel bars are required to meet the design requirement; the overlap joint length of the steel bars is not less than 35 times of the diameter of the steel bars, binding or welding modes are adopted, and overlap joint positions are staggered; The reinforcing steel mesh is embedded horizontally as much as possible, and the horizontal height difference of the two sides is controlled within +/-1 cm; 7) Seam treatment When the patch is positioned at the edge or corner of the slab, the original joint of the pavement is treated: during crushing and cleaning, removing the joint filling material and the backing strip in the joint; Before casting, placing a compressible isolation plate (10) at the joint, wherein the compressible isolation plate (10) is a rubber plate or a foam plate, the width of the compressible isolation plate is the same as that of the original joint, and filling a backing strip (11) and a joint filling material (4) at the upper part of the compressible isolation plate (10) such as the rubber plate or the foam plate at the joint after casting; If the original joint is provided with the original dowel bar (6) or the original pull bar (7), the original joint is restored, and when the original joint is restored, the original dowel bar (6) or the original pull bar (7) is drilled and installed again at the position horizontally offset by 10-20 cm; 8) The additional force transmission rod (9) is arranged When the length of the joint direction is more than 2m, namely when the patch area is large, the original dowel bar is restored at the joint, namely, the reinforcing dowel bar (9) is arranged: the reinforcing rods (9) are added and arranged in the center of the plate thickness by adopting smooth round steel bars; a force transmission rod (9) is additionally arranged at the common joint position, and 5cm is added to half of the length of the force transmission rod, and thin asphalt or plastic sleeves are coated on the force transmission rod; The expansion joint is provided with a force transmission rod (9), a sleeve is arranged at one end of the asphalt coating, a gap is reserved in the sleeve, foam plastics and yarn heads are filled in the sleeve, and sleeve ends are staggered; the distance between the outermost added force transmission rod (9) of the plate and the joint or the sliding end is 15-20 cm; 9) Pit cleaning The broken pieces and other sundries in the pit are cleaned, then the pit is cleaned by a high-pressure water gun, and finally the pit is cleaned and repaired by high-pressure air, so that the pit is ensured to be free of sundries and dust; 10 The concrete pouring, leveling, surface making, napping, maintenance and other links are the same as the requirement of part thickness repair.

Description

Method for treating diseases of old airport pavement in high-heat area Technical Field The invention relates to the technical field of pavement disease treatment, in particular to a method for treating old airport pavement disease in a high-heat area Background Typically, pavement slab failure classifications include failure such as camber, board angle fracture, transverse and longitudinal oblique cracking (i.e., transverse, longitudinal, oblique cracking), durability cracking (i.e., D-shaped cracking), old pavement patches, spalling, subsidence dislocation, breaker plate, joint chipping, alkali-aggregate reaction, and the like. In high-heat areas (e.g., iracinari), airport roads are subjected to high temperature, load and environmental factors for a long period of time, and the main diseases are as follows: 1. Crack breaking plates, including "longitudinal, transverse and oblique cracks", "breaker plate or cross crack", "corner fracture", etc.; 2. Joints, including "joint compound damage, failure", "joint breakage", "panel corner spalling" and "spalling", etc.; 3. Vertical displacement of the road panel comprises 'mud pumping and board bottom void', sinking or staggering and the like; 4. skin layers include "skinning, cracking and microcracking", "durability cracking", "shrinkage cracking" and "potholes", and the like. At present, for road surface diseases in high-heat areas, common treatment methods comprise: 1. The traditional asphalt mat face repairing mode is easy to cause the problems of rutting, loosening and insufficient ageing resistance in a high-temperature environment; 2. The cement concrete plate replacement repairing mode has long construction period and high cost, and the combination property of the old road surface and the new road surface is poor, so that new diseases can be possibly caused; 3. Composite repair methods, such as the use of asphalt paving in combination with cement grouting, have a lack of adaptability to use at periods of high Wen Ouchang. Disclosure of Invention The invention aims to provide a method for treating old airport pavement diseases in a high-heat area, which aims to solve the technical problems in the background technology. In order to achieve the above purpose, the invention adopts the following technical scheme: A method for treating diseases of old airport roads in high-heat areas is characterized by comprising the following steps: s1, disease evaluation and classification treatment, namely identifying the type of the pavement disease through on-site investigation, radar detection and ultrasonic detection, and classifying the pavement disease types into a crack fracture plate type, a seam type, a pavement plate vertical displacement type and a surface layer type according to measurement statistics results; S2, planning a treatment scheme according to the type of the pavement diseases, wherein the treatment scheme specifically comprises a crack broken plate disease treatment countermeasure, a joint disease treatment countermeasure, a pavement plate vertical displacement disease treatment countermeasure and a surface layer disease treatment countermeasure, and specific diseases are treated through specific technical schemes of a joint or crack filling process, a pavement plate partial thickness repairing process, a panel full thickness repairing process, a foundation grouting process and a plate grinding process; S3, high-temperature resistant composite cover surface treatment, namely paving a modified asphalt concrete cover surface on the repaired road surface, and doping a high-temperature stabilizer to enhance the high-temperature resistance; S4, interface reinforcement and drainage optimization, namely adopting an interface bonding material to improve the bonding force between the old pavement and the new pavement, avoiding the separation of the interface layer, optimizing a field pavement drainage system, adjusting the gradient, adding a drainage groove and reducing the damage of rainwater retention to the pavement. Further preferably, the crack-breaking plate-like damage treatment countermeasure includes full-thickness repair, partial-thickness repair, or crack-filling-type repair; In the full-thickness repair, a plurality of longitudinal, transverse or oblique cracks exist on a single plate, when the length of a single crack exceeds half of the length of the short side of the plate, and the average width of one crack is more than 10mm, the plate is replaced integrally, and an original dowel bar or a pull rod is restored in the plate restoring process; In the partial thickness repair, the plate blocks around the crack have no obvious dislocation, but when the plate blocks in the crack influence area are peeled off seriously, the partial thickness repair is carried out on the plate blocks, the repair depth is half of the thickness of the plate blocks, and the connection between the repair blocks and the original pavement is enhanced by arranging connecting