Construction method of subbase of highway pavement

Abstract

The invention discloses a construction method of a subbase layer of a highway pavement, and particularly relates to the technical field of building construction, and the construction method comprises the following steps: step 1, cleaning and trimming the surface of the subbase layer, step 2, recovering a center line, step 3, paving cobblestones and reinforced concrete on the surface of the subbase layer, step 4, adding a thermal insulation layer and an anti-crack layer, and step 5, stacking a conventional mixture. According to the construction method, on the basis of original conventional mixture laying construction, the cobblestones and the reinforced concrete are fully mixed and coagulated by laying the cobblestones and the reinforced concrete, so that a powerful supporting surface is formed on the surface of the bottom of the subbase layer, and the overall pressure resistance of a highway pavement is improved; meanwhile, the thermal insulation mixture and the anti-cracking mixture are additionally arranged on the basis of the subbase layer, so that the influence on the highway pavement caused by frost cracking of the bottom of the subbase layer due to cold weather is avoided, and the high strength, the high thermal insulation property and the high anti-cracking property of the highway pavement are improved on the basis of not influencing conventional construction.

Description

technical field [0001] The present invention relates to the technical field of building construction, and more particularly, to a construction method of a sub-base of a road pavement. Background technique [0002] Highway pavement refers to the layered structure paved within the range of the roadway on the highway subgrade. According to the layer and its function, it can be divided into three main layers: surface layer, base layer and cushion layer. Some pavements only use two structural layers of surface layer and base layer, or even use only one surface layer structure; [0003] The sub-base is the secondary load-bearing layer or auxiliary layer paved with materials of poor quality under the pavement base. [0004] At present, in the construction of highway pavement, conventional mixtures, such as gravel soil and stones, are often laid on the surface of the foundation pit to form a weighing layer and an auxiliary layer at the bottom of the foundation pit. However, convent...

AI Technical Summary

Problems solved by technology

[0004] At present, when building construction on the road surface, conventional mixtures, such as gravel soil and stones, are often laid on the surface of the foundation pit to form a weighing layer and an auxiliary layer at the bottom of the foundation pit. However, conventional gravel soil and stone Blocks cannot meet subbase material requirements and construction due to:

[0005] First, during building construction, the conventionally laid subbase is susceptible to frost cracking and frost damage due to weather, which affects subsequent construction, and is easy to cause damage to the materials laid on the subbase, affecting the bearing capacity of the road surface;

[0006] Second, at present, gravel soil generally has low strength, and the test indicators such as liquid-plastic limit are also relatively poor, which cannot meet the requirements of the subbase material required by the specification, which in turn affects the bearing capacity of the subbase, resulting in low compressive resistance of the highway pavement ;