Open caisson type soft soil foundation and soft soil foundation reinforcing method

Abstract

The invention discloses an open caisson type highway soft soil foundation reinforcing method and belongs to the technical field of geotechnical engineering and road engineering. The open caisson type soft soil foundation sequentially comprises a pavement structure layer (1), a foam light soil roadbed layer (2), a replacement structure layer (A) and a deep and thick soft foundation layer (B) from top to bottom. The soft soil foundation reinforcing method comprises the following steps that in a set range, an original soft soil foundation is excavated, and a deep and thick soft foundation layer (B) is exposed; and in the excavated original soft soil foundation area, a replacement structure layer (A), a foam light soil roadbed layer (2) and a pavement structure layer (1) are sequentially constructed above the deep soft foundation layer (B) from bottom to top, and the open caisson type soft soil foundation is obtained. According to the open caisson type soft soil foundation and the soft soil foundation reinforcing method, no extra additional stress is generated, differential settlement after construction is reduced, the overall strength of the roadbed is high, deformation after construction is small, the construction speed is high, the construction period is short, the flexibility is high, and the application range is wide.

Description

technical field [0001] The invention relates to the technical fields of geotechnical engineering and road engineering, in particular to a caisson type highway soft soil foundation reinforcement method. Background technique [0002] In the prior art, for deep and thick soft soil foundations, replacement methods, composite foundations, vacuum preloading and other methods are usually used for reinforcement. Replacing the crushed stone cushion not only has a long construction period, but also produces a large additional stress on the lower soft foundation, resulting in uneven and overall settlement; composite foundations (gravel piles, etc.) and vacuum preloading are used for deep and thick soft foundations. The effect is good, but the project cost is high and the construction speed is slow; the above reinforcement schemes are widely used in our country, but for municipal roads or urban traffic roads, the use of the above methods will lead to higher costs and longer construction...

AI Technical Summary

Problems solved by technology

Replacing the crushed stone cushion not only has a long construction period, but also produces a large additional stress on the lower soft foundation, resulting in uneven and overall settlement; composite foundations (gravel piles, etc.) and vacuum preloading are used for deep and thick soft foundations. The effect is good, but the project cost is high and the construction speed is slow; the above reinforcement schemes are widely used in our country, but for municipal roads or urban traffic roads, the use of the above methods will lead to higher costs and longer construction periods, which is very unfavorable. Suitable for the construction of municipal roads

Images