Method for repairing asphalt mixture roadbed at periphery of walling crib of inspection shainspection shaft by microwave heating

Abstract

The invention relates to a method for repairing an asphalt mixture roadbed at the periphery of a walling crib of an inspection shaft by microwave heating. The method comprises the following steps: (1) transporting a microwave heater to the roadbed to be repaired, opening a shaft cover, and detecting the concentration of combustible gas inside the shaft, (2) placing a shaft cover protective sleeveon the foreshaft, placing a proper amount of new asphalt mixed cold material on the shaft cover protective sleeve, and placing the microwave heater on the foreshaft, (3) starting up a shaft cover repairing mode of the microwave heater, heating the asphalt mixture at the periphery of the outer edge of the walling crib for a period of time, heating the asphalt mixed cold material in the shaft coverprotective sleeve, (4) heating the asphalt mixture at the periphery of the outer edge of the walling crib and the asphalt mixed cold material in the shaft cover protective sleeve to a construction temperature, and (5) if asphalt concrete at the periphery of the outer edge of the original walling crib is polluted and cannot be used repeatedly, removing the asphalt concrete, dumping the heated asphalt mixture in the shaft cover protective sleeve at the periphery of the walling crib, and spreading and compacting the asphalt mixture. The method makes the roadbed at the periphery of the inspectionshaft have high repairing quality, short repairing time, safety and no pollution.

Description

technical field [0001] The invention relates to a microwave heating repair method for the asphalt mixture pavement around the outer edge of the well circle of an inspection well, and belongs to the improvement technology of the repair method for the asphalt mixture road surface around the outer edge of the well circle of the inspection well. Background technique [0002] Asphalt concrete pavement has many advantages such as comfortable driving, low construction cost, and easy repair, and has been widely used in high-grade pavements and urban roads. For many kinds of inspection wells arranged on the road, such as sewage wells, power wells, communication wells, rainwater wells, gas wells and cable TV wells, there are defects such as uneven paving and insufficient compaction during construction, resulting in inspection wells. The pavement around the well circle is frequently damaged, which is a major problem in the maintenance of asphalt pavement. The traditional method of man...

AI Technical Summary

Problems solved by technology

For many kinds of inspection wells arranged on the road, such as sewage wells, power wells, communication wells, rainwater wells, gas wells and cable TV wells, there are defects such as uneven paving and insufficient compaction during construction, resulting in inspection wells. The pavement around the well circle is frequently damaged, which is a major problem in the maintenance of asphalt pavement

The traditional method of manual cold excavation, then filling, and then compaction has many defects, such as long construction time, which affects traffic, and at the same time, the method is inefficient, and there are cold joints in the repaired road surface. The joints are not closed tightly, and water is easy to seep in. And become the weak surface of force, after repairing for a period of time, it will be damaged again from the seam

Another method is to use red line heating and repairing. Infrared heating uses red line as a heating source, uses the heat contained in it to radiate to the ground to heat the road surface, and then uses the temperature difference to conduct heat downward, thereby heating the road surface. Infrared heating exists The disadvantage is that the depth of infrared heating is relatively shallow, and the high surface temperature of infrared heating can easily burn the asphalt on the surface. There are cold joints on the repaired road surface. At the same time, infrared heating produces open flames. Explosion, when repairing other power wells and communication wells, the infrared open flame is easy to burn the communication cables; infrared heating is a huge danger to heating the natural gas inspection manhole cover; infrared heating composite well rings or manhole covers will burn the composite material; Heated asphalt mix that requires external assistance to replace contaminated asphalt mix around the original well circle

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