Sedimentation control structure of passable road highway roadbed and construction method

Abstract

The invention relates to a sedimentation control structure of a passable road highway roadbed. The sedimentation control structure of the passable road highway roadbed consists of weak displacement piles, a slurry cementing cushion layer bearing board, a slurry injection steel pipe, a concrete cover plate and light soil, wherein the weak displacement piles are uniformly arranged at the both sides of a highway embankment; the slurry injection steel pipe passes through a roadbed cushion layer and is connected with reserved steel ribs at the top parts of the weak displacement piles at the both sides; a shaped hole is formed in the middle section of the slurry injection steel pipe; the slurry cementing cushion layer bearing board is formed by carrying out high-pressure grouting inside the cushion layer through the slurry injection steel pipe; and the concrete cover plates at the tops of the weak displacement pile are connected with the slurry cementing cushion layer bearing board as a whole body. According to the sedimentation control structure disclosed by the invention, the integrity and the bearing capability of the roadbed can be improved and the weight of roadbed filling materials is also reduced, so that highway roadbed sedimentation is rapidly controlled under the preconditions of not influencing the normal operation of a highway and not damaging a road surface structure layer. The invention further discloses a construction method of the sedimentation control structure of the passable road highway roadbed.

Description

technical field [0001] The invention relates to a subgrade settlement control structure and construction method of a highway opened to traffic, which belongs to the field of foundation engineering and is suitable for settlement control and disease prevention projects during the operation period of roads with large post-construction settlement and uneven settlement deformation. Background technique [0002] At present, the foundation soil in my country's coastal provinces, the Yangtze River Delta, and the Pearl River Delta usually contains a certain thickness of soft soil, which has the characteristics of high moisture content, high compressibility, poor permeability, high sensitivity, low strength, and uneven thickness. Excessive post-construction settlement and obvious differential settlement are one of the common diseases of operating roads in soft soil areas. A large deceleration, and even cause traffic accidents. Therefore, the problem of subgrade settlement has become ...

AI Technical Summary

Problems solved by technology

However, the method fails to realize the lateral reinforcement of the embankment structure and the deep transfer of the upper load, and the control effect on post-construction settlement is relatively limited

[0006] To sum up, although there are some methods that can be used to deal with abnormal settlement problems of highways that have been opened to traffic, most of them need to destroy the original pavement structure and take temporary traffic control measures such as road closures. It is difficult to apply to road sections with high saturation; the existing method of embankment lateral drilling light-weight replacement to control settlement under normal traffic conditions is difficult to solve the problem of load transfer path and embankment integrity

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