A method of backfilling the circumference of a road shaft

Abstract

The invention discloses a road vertical shaft periphery backfilling method. The method comprises the following steps that S1, fillers are prepared, wherein remaining inorganic materials and cement after use in a road base layer construction process are uniformly stirred to form a mixture, the use amount of the cement is 2-3% of that of the inorganic materials, a part of the mixture is uniformly mixed with water to form the filler A, the moisture content of the filler A is the value of the optimum moisture content, plus or minus 2, of the inorganic materials, the remaining part of the mixture is uniformly mixed with the water to form the filler B, and the moisture content of the material B is 80-95% of the optimum moisture content of the inorganic materials; S2, backfilling is conducted layer by layer between a vertical shaft and a road base layer, wherein the thickness of each layer is 20 cm, and the other layers except the uppermost layer are all backfilled with the filler A preparedin step S1 and then vibrated and compacted; S3, the uppermost layer is backfilled with the filler B prepared in step S1 and then rolled and compacted. The method has the advantages that the peripheryof the vertical shaft can be filled with the fillers, the coordination performance with the surrounding base layer is improved, and the possibility of cracking of a road surface during use in the later period is decreased.

Description

technical field [0001] The invention relates to the technical field of road construction, more specifically, it relates to a method for backfilling the circumference of a road shaft. Background technique [0002] With the process of urban modernization, people have higher and higher requirements for urban municipal facilities. In order to meet the needs of people's normal life and drainage in rainy days, there are usually rainwater wells on the road, pipes for draining rainwater are arranged in the rainwater wells, and rainwater outlets for the rainwater on the road to flow into the drainage pipes are opened on the road. It first flows into the drainage pipe through the rainwater outlet, and then flows out. Of course, the daily maintenance of the pipeline requires the installation of rainwater inspection wells. However, road surface subsidence often occurs around inspection wells and rainwater outlets during road use, which causes bumps when traveling vehicles pass through...

AI Technical Summary

Problems solved by technology

However, in the process of road use, the road surface around the inspection well and the rainwater outlet often sinks, causing the vehicle to bump when passing the inspection well or the rainwater outlet, which seriously affects the safety of driving.

[0003] When inspection wells and gullies are excavated back, it is usually necessary to slot the inspection wells, gullies and gully branch pipes. At this time, backfilling around the wells, gullies and gully branch pipes becomes difficult, because sometimes the road base In the construction, it is paved with inorganic materials, and the inorganic materials refer to mixing a certain amount of cement, or lime, or industrial waste slag and other inorganic binders and water into the crushed or undisturbed loose soil, and mixing to obtain the mixture after compaction and After curing, the obtained compressive strength meets the specified materials, and the stiffness of inorganic materials is lower than that of cement concrete. Therefore, if concrete is vibrated and backfilled, the strength is too high and the surrounding base is not coordinated, and it is easy to cause cracks in the road surface during later use.

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