Construction method of anti-settling subgrade

Abstract

The invention discloses a construction method of an anti-settling subgrade. The anti-settling subgrade is built in sections. The construction method of each section of the anti-settling subgrade comprises the following steps: tamping and leveling the surface of a soft soil foundation to form a soft soil layer; sequentially laying geotextile, water absorption fiber cloth and geotextile on the surface of the soft soil layer from bottom to top to form a first water guide layer; laying concrete on the surface of the first water guide layer and vibrating to be compact to form a concrete layer; after the concrete layer is solidified, laying a filler on the surface of the concrete layer to form a filler layer; after the filler layer is tamped and leveled, sequentially laying geotextile, water absorption fiber cloth and geotextile on the surface of the filler layer from bottom to top to form a second water guide layer; laying a sandy soil layer on the surface of the second water guide layer; laying a wave roofing slate on the surface of the sandy soil layer; laying a rubble layer on the surface of the wavy roofing slate; and paving a pavement layer on the surface of the rubble layer. By improving the structure of the subgrade, the optimized stress inside the subgrade is combined with rapid water diversion, and the anti-settling effect of the subgrade is achieved.

Description

technical field [0001] The invention relates to the field of civil engineering. More specifically, the present invention relates to a construction method of an anti-settling roadbed. Background technique [0002] Subgrade refers to a belt-shaped structure built according to the route position and certain technical requirements as the foundation of the road surface. It is a linear structure built with soil or stone. Because the roadbed is exposed to the external environment for a long time, it is easy to be washed by rainwater, and the roadbed matrix is ​​easily swelled or loosened by water penetration, resulting in instability of the roadbed. The road surface is prone to cracking and subsidence, which is very unfavorable to driving safety. Therefore, people have designed some anti-settlement roadbed structures, which generally lay quicklime bags in the roadbed, and the quicklime reacts with water to form solid calcification, and the volume expands to make up for the soil l...

AI Technical Summary

Problems solved by technology

Because the roadbed is exposed to the external environment for a long time, it is easy to be washed by rainwater, and the roadbed matrix is ​​easily swelled or loosened by water penetration, resulting in instability of the roadbed

The road surface is prone to cracking and subsidence, which is very unfavorable to driving safety

Therefore, people have designed some anti-settlement roadbed structures, which generally lay quicklime bags in the roadbed, and the quicklime reacts with water to form solid calcification, and the volume expands to make up for the soil loss caused by water flow and the inner cavity of the roadbed However, the amount of quicklime in the roadbed is always limited, and the service life of the road is relatively long. After the quicklime in the roadbed is completely reacted, the roadbed still faces the risk of settlement. Easier for moisture to penetrate

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