Construction method for preventing airport surface from forming crack and crushed stone

Abstract

A construction method for preventing airport pavement from producing crack and crushed stone from shedding is characterized by that it uses asphalt and aggregate, and mixes them into asphalt concrete and makes it into precast strip; and its construction method includes the following steps: repairing crack, melting and infiltrating solvent into recess to form connecting surface, closing crack and sticking rubberized tape to cover crack, filling precast strip, and compacting, and making the precast strip and connecting surface into one integral whole, filling expansion joint with gap-filling adhesive, melting, infiltrating and closing the crack, preventing production of water-penetrating gap, renovating surface layer of airport pavement, welding covered crack and expansion joint so as to effecively prevent airport pavement from producing crack and crushed stone from shedding.

Description

technical field [0001] The invention relates to a construction method for preventing cracks from falling off on the airport surface. Background technique [0002] Today's airport scenes (runways, taxiways, parking pads, test pads, heating pads, maintenance sheds, etc.) are paved with cement concrete or asphalt concrete, and the number of flights is becoming more and more frequent, and the load of passenger and cargo aircraft is increasing day by day , after the cracks on the scene are rolled and vibrated, it is easier to fall off gravel, and the current new fighter jets, passenger and cargo civil aircraft, etc. also have the characteristics of large thrust (blowing gravel) and large suction (sucking gravel); The potential danger of inhaling gravel is more serious, and the more advanced the aircraft, the more expensive the maintenance cost; therefore, how to prevent cracks and falling gravel from the scene is very important. [0003] The existing construction methods such as...

AI Technical Summary

Problems solved by technology

[0006] Refer to Figure 3, 4, 5, construction steps of expansion joint grouting: see Figure 3, E in the figure, insert PE strips about two centimeters below the joint; F in the figure, fill in the sealant, when filling Although bonded to the surface of the fracture wall, it does not penetrate into the capillary pores of the wall; see Figure 4 , G in the figure, it is separated from the slit wall after thermal expansion and contraction, and cannot be bonded again, forming a water inlet gap; H in the figure, water easily enters the gradation layer from the gap through the guide crack; I in the figure makes the fine bone The material sinks and loses, which affects the stability of the graded layer, causing the layout to sag and break after being rolled by heavy equipment; refer to Figure 5 , J in the figure, the corner part of the layout, due to the large amount of concentrated water inflow in the expansion joint, it is easier to sink and produce fracture cracks

[0007] refer to Image 6 , the surface (cement concrete or asphalt concrete) is updated; M in the figure, spraying the bonding layer on the overlay surface; K in the figure; pasting engineering fabrics on the expansion joints and cracks; L in the figure, the paving thickness is 10 cm The above asphalt concrete pavement; but because of the stretchability of the engineering fabric pasted on the overlay surface, it is easy to cause the phenomenon of sliding and peeling off the overlay surface layer, and the engineering fabric is prone to oil leakage, which cannot be tightly integrated with the construction surface. It is easy to move and produce wrinkles during pressing, so that the cracks and expansion joints on the construction surface cannot be effectively protected; D in the figure, after thermal expansion and contraction, the original cracks and expansion joints are prone to reflective cracks, and water is easy to enter to make the joint wall Loose, cracks continue to expand, or even create holes in the bottom layer

[0008] As can be seen from the above description, the existing construction method for preventing the airport surface from producing gravel has the following deficiencies: the existing airport surface repair crack and surface layer renewal construction method often paves (fills) and builds construction materials with a thickness of more than 10 centimeters. The extension of the thickness reflects the time when the cracks occurred; and repairing the cracks in the cement concrete layout requires a maintenance period after pouring, so the construction period is long, and the construction area must be closed, which will inevitably increase the taxiing length of the aircraft, or close the airport, affecting the operation and equipment of the airport:

[0011] 3. Increase the maintenance cost of aircraft and support equipment (maintenance, periodic maintenance, breakdown repair manpower, and consumption of expensive accessories and regular replacement parts)

[0012] 4. Increase fuel consumption of aircraft and supporting equipment

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