Double-hard-shell-layer on-site reinforcing and filling structure and method of subgrade in muddy soft soil area

Abstract

The invention discloses a double-hard-shell-layer in-situ reinforcing and filling structure and method of a subgrade in a muddy soft soil area. The structure comprises a first hard shell layer laid ona muddy soft soil layer and a plurality of end bearing piles which penetrate through the first hard shell layer and the muddy soft soil layer to be hit to underlying bedrock, and a plurality of reinforcing layers and a second hard shell layer are sequentially laid on the first hard shell layer. The method comprises the steps of 1, determining basic parameters of the double-hard-shell-layer in-situ reinforcing and filling structure of the subgrade in the muddy soft soil area; 2, paving the first hard shell layer; 3, pouring the end bearing piles; 4, paving a reinforcing layer; 5, forming a plurality of reinforcing layers; and 6, paving the second hard shell layer. The first hard shell layer is laid, a working platform is provided for construction equipment, then the end bearing piles and the multiple reinforcing layers are constructed, finally, the second hard shell layer is constructed, loads are transmitted to the first hard shell layer through the second hard shell layer and a pilewall structure, the loads are directly transmitted to the underlying bedrock through the end bearing piles, and the whole structure system does not deform or settle.

Description

technical field [0001] The invention belongs to the technical field of in-situ reinforcement of roadbeds in soft soil areas, and in particular relates to an in-situ reinforcement filling structure and method for roadbeds in silty soft soil areas with double hard shell layers. Background technique [0002] The biggest characteristics of the physical and mechanical properties of silty soft soil are high water content, large void ratio, strong permeability, low strength, large deformation, long consolidation time, high compressibility, thixotropy, rheology and strong incompatibility. Uniformity. Silt soft soil is widely distributed in my country's coastal areas and along river basins, which is extremely harmful to engineering construction. Traditional roadbed reinforcement in muddy soft soil areas usually adopts the method of excavating muddy soft soil and replacing it with earthwork. This method The settlement in the later stage of construction is still very large, and the eff...

AI Technical Summary

Problems solved by technology

Silt soft soil is widely distributed in my country's coastal areas and along river basins, which is extremely harmful to engineering construction. Traditional roadbed reinforcement in muddy soft soil areas usually adopts the method of excavating muddy soft soil and replacing it with earthwork. This method The settlement in the later stage of construction is still very large, and the effect of roadbed reinforcement is not good

And for the silty soft soil area where the silty soft soil is widely distributed and the surrounding construction environment is complex, there are often some problems. First, it is inconvenient to excavate the silty soft soil to replace the earthwork; second, to fill the roadbed and Dredging and filling is facing shortage of earthwork

Therefore, there is a lack of an effective method of roadbed reinforcement and filling in silty soft soil areas.

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