A salt-alkali-proof and permeable pavement structure

Abstract

The invention belongs to the technical field of road engineering and relates to a saline-alkaline preventing water permeable pavement structure which is used for the occasion of coastal city road paving or road paving after sea filling and land accretion. The problem of pavement subsidence caused by seawater eroding is achieved. The effect of saline-alkaline corrosion preventing is achieved. Road hardening is achieved, and the service life of a road is prolonged. The pavement structure sequentially comprises a cushion layer, a water permeable layer, a base layer, a leveling layer and a surface layer from bottom to top, wherein a composite material with the thickness being 50-100 mm is laid on the base layer, and comprises the following raw materials, by weight, of 35-60 parts of skeletal materials, 20-45 parts of coal ashes, 12-16 parts of medium sand, 5-10 parts of clay powder and 10-15 parts of binding agents. The skeletal materials are one of oyster shells, seashells and conch shells or shell particles freely combined by the oyster shells, the seashells and the conch shells. The structure is simple; water permeability is strong; corrosion resistance is achieved; cost is low; the application environment is friendly; the service life is long; the road maintenance cost is low; and good economic benefits and market prospects are achieved.

Description

Technical field: [0001] The invention belongs to the technical field of road engineering, and relates to a salt-alkali-proof permeable pavement structure, which is used for road paving in coastal cities or road paving occasions after reclaiming sea and land. Background technique: [0002] Land reclamation is actually to reclaim land from the sea. A certain area of ​​tidal flats must be enclosed first, and then reclaimed. There are usually two forms of land reclamation from the sea. One is land reclamation connected to the coast of the mainland, called "surrounding"; the other is artificial islands suspended in shallow seas. In the reclamation of land connected to the mainland, there are two more methods of reclamation. One is to directly build a dike on the tidal flat outside the coastline; the other is to fill the tidal flat inside the seaport. In addition to rock fill, dredged mud is widely used as a filler instead of good sand and other geotechnical materials, which not only ...

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Problems solved by technology

[0003] In the prior art, Chinese patent CN103864370B discloses a steel slag waste rubber casting waste sand road material and its preparation and laying method. The material includes a road base and a road surface. The road base is made of the following raw materials in weight percentage: steel slag 36- 58%, waste rubber particles 8-12%, foundry waste sand 5-36%, consolidation agent 15-35%, the road surface is made of the following raw materials backed up by weight: steel slag 22-55%, waste rubber powder 8- 18%, casting waste sand 5-35%, consolidation agent 3-15%, this technical scheme prepares road materials from steel slag, waste rubber, and foundry waste sand that pollute the environment, and uses the strengthening effect of foundry waste sand to improve road quality. The strength of the material, using the strengthening effect of foundry waste sand to reduce the rigidity of road materials, improve the crack resistance and driving comfort of road materials, and at the same time replace natural gravel with steel slag, reduce the economic cost of road materials, and have significant social and economic benefits , but the roads in coastal cities or the roads after land reclamation are in the sea area, seawater will gradually soak through the pipeline or the ground surface to corrode the steel slag, causing the road to sink or crack, reducing the service life of the road and increasing maintenance costs

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