초록

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Abstract ▼ AI-Helper

A series of model tests were performed to investigate the deformation of ground, in which surcharges were loaded on the ground surface during trench excavation for diaphragm walls. An apparatus was manufactured to observe the failure pattern of a slurry-supported trench in sandy ground. Ground defor...

A series of model tests were performed to investigate the deformation of ground, in which surcharges were loaded on the ground surface during trench excavation for diaphragm walls. An apparatus was manufactured to observe the failure pattern of a slurry-supported trench in sandy ground. Ground deformations including settlement and lateral displacement of the surrounding ground adjacent to the trench were carefully monitored during excavation. Experimental observations indicated that the settlement of ground were affected greatly by surcharge loads. Especially, the considerable settlement occurred when the surcharge was loaded within the Rankine active zone. The higher settlement was obtained when the surcharge was closer to the trench. However, the influence area of settlement increased while the surcharge was loaded far from the trench. Also, the lateral wall face of excavated trench was bulged with lowering the slurry level and then the upper part of trench failed finally. Considering the surcharges, the empirical settlement envelope was discussed to predict the deformation behavior of the adjacent ground due to the trench excavation reasonably.

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