Subgrade construction method for aeolian sand section and structure and device thereof

Abstract

The invention belongs to a subgrade construction method for an aeolian sand section and a structure and a device thereof; the method comprises the steps of construction preparation, filler sampling inspection, aeolian sand loading and transportation, aeolian sand laying and leveling, water replenishing for aeolian sand, aeolian sand compaction, testing detection of compacted aeolian sand, formation of sand fixing columns by grouting the interior of the upper part of a rolling-compacted molded aeolian sand filling layer by a rapid sand fixing column construction machine, slope stacking with sand bags, road bed acceptance, sand gravel loading and transportation, sand gravel layer laying, sand gravel watering compaction, testing detection of a sand gravel layer and compound slope protection.The device is the rapid sand fixing column construction machine, can form four sand fixing columns distributed at intervals. The method and the device can effectively build a road in the aeolian sandsection, provide the feasible subgrade structure and rapid reinforcement equipment, and have the advantages of simple and practical method, stable subgrade slope, low construction risk, low cost, construction period saving, no pollution, long service life of highways and good use effect.

Description

technical field [0001] The invention belongs to a roadbed construction method of aeolian sand section and its structure and equipment. Background technique [0002] At present, desertification, soil erosion and lack of soil resources are serious in our country. In such areas, sandy soil (commonly known as "aeolian sand") is often encountered during road subgrade construction. Silt and fine sand soils are common, and the thickness of the sand layer is more than 10 meters. In the natural state, it is loose, with good water permeability, low natural moisture content, no plasticity, no cohesion, and good mechanical properties. The nature of the project is poor. Existing machinery cannot form pile holes. Because it cannot be compacted in its natural state and it is difficult to stabilize the slope, it is generally not used as a road construction material. However, road construction passing through the above-mentioned areas is a problem that must be faced and solved. The conve...

AI Technical Summary

Problems solved by technology

[0003] First, the cost of aeolian sand dumping, on-site dumping, renting and purchasing of spoil yards, etc. is too high, which increases the output of costs

[0004] Second, the abandonment of aeolian sand has greatly increased the overall construction period, increased the input of manpower, material resources, financial resources, etc., and the risks in all aspects will naturally increase

[0005] Third, the waste of soil resources caused by a large amount of soil borrowed outside the road has aggravated the problem of lack of road construction materials

[0006] Fourth, the aeolian sand is abandoned outside, and a large amount of soil is taken outside the road, resulting in desertification, soil erosion, and serious damage to the ecological environment, which does not meet the requirements of green construction

[0007] Fifth, the difficulty in forming stable roadbeds and slopes, and the inability to compact the aeolian sand road construction materials cannot be solved. In future use, it is easy to cause loss and hollowing out, causing cracks and collapses in the road surface, and shortening the service life of the road.

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