The In-situ Test And Numerical Simulation Of The Soft Soil Roadbed Near The Lake Reinforced By Pile-net Composite Structure

Pile-net composite foundation is a new technology in soft-soil foundationtreatment. Pile-net composite foundation is a artificial foundation system withpile-net-soil working together to share the loads. This system containing the pile, net,soil works easily and efficiently with smaller ground settlement, higher stability,shorter construction period. Compared with other technology, the pile-net compositefoundation have advantages in economic and technical aspect.Based on the engineering project of pile-net composite foundation in deep softsoil of the A1bid of ring expressway in Jiujiang, the field monitoring of the stress ofthe pile and soil, the stretching of the reinforced soil, and the ground settlement isconducted by setting monitoring section, embedding earth pressure cell, displacementmeter, settlement plate,etc. And the data from the field is arranged and analyzedafterwords. Then analyze the changing rule of the press assigned to the pile and soilby modeling the construction of the embankment and the post-construction settlementof the soil between the piles by using the FLAC3D software. The result of thisanalysis provide technical guidance to the construction of foundation reinforcement ofthe A1bid of ring expressway in Jiujiang, and supposed to provide technical referenceto design and construction of pile-net composite foundation.