Analysis of Field Monitoring Results and Reinforcement Effects in Reclamation and Soft Soil Foundation Treatment Project
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Abstract:
Soft soil foundation treatment methods and field monitoring schemes in the reclamation and soft soil foundation improvement project were introduced, and the monitoring results of the surfacial settlement, layered settlement, and pore water pressure and reinforcement effects of soft silty soil foundation with preloading method were analyzed. The results showed that (1) the settlement during the loading construction period is accounted for 65% of the total settlement, and the settlement during the loading intermittent period increases linearly with time. The settlement during the full load pre-compression period is accounted for 35% of the total settlement, and it shows an approximately parabolic increasing with time; (2) the settlement in the surfacial silt from 0 to 6 m is accounted for 53.9% of the total settlement, where the settlement mainly occurs, while the settlement in the underlying layer of silt is accounted for 22.8% of the total settlement, and the estimated foundation settlement should consider the settlement in the underlying layer of silt; (3) the excess pore water pressures in the surfacial and bottom silt layers dissipate faster than that in the middle layer. The excess pore water pressure at different depths dissipates by 80%after six months of full load, and it dissipates by 85% to 90% after eight months of full load; and (4) the physical and mechanical properties and strength of silt improve significantly after reinforcement, indicating an obvious reinforcement effect.
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