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Ground Behavior Behind Soil Nailed Wall by Feed Back Analysis  

Jeon, Seong-Kon (Dept. of Civil Engrg., Yeojoo Institute of Technology)
Publication Information
Journal of the Korean Geotechnical Society / v.19, no.3, 2003 , pp. 5-13 More about this Journal
Abstract
The soil nailing is one of the useful support-system in urban excavation because of the presence of other structures in the vicinity Since the soil nailing system was introduced, model experiments and theoretical studies have been performed to investigate behavior of soil nailed wall. However, there are few data in the case of multi-layered soil strata just like Seoul Metropolitan area in Korea. The feed back analyses are carried out using the measured wall displacement data for soil nailing construction sites with multi-layered strata in order to analyze the distance and the coefficients of extension zone of ground behind soil nailed wall. As a result, the distance of extension zone increased with increasing of the final excavation depth and the ratio of the distance to the final excavation depth was shown to be about 94% of the final excavation depth. Also, the coefficients of extension zone increased with enlargement of soil layer thickness and converged into constant value of 1.05. On the other hand, the maximum vertical displacements by the feed back analysis and Caspe's method were shown to be approximately 80%, 150~280% of the maximum horizontal displacement respectively.
Keywords
Displacement; Etenxion zone; Excavation; Feed back analysis; Measurement; Multi-layer; Soil nailing;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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