Numerical Analysis on Behaviors of Very Soft Ground Improved by Geotextile
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In generally, ground surface strengthening such as using geotextile is needed to secure trafficability of construction equipment. Several calculation methods for bearing capacity for very soft ground improved by geotextile have been proposed already but they are not established yet. In this paper, elastoplastic finite element analysis is carried out to estimate bearing capacity improvement for very soft ground reinforced by geotextile. In conclusion, by reinforcing with geotextile the bearing capacity improvement of very soft ground is increased with the increase of the settlement after yielding. And it is enough that the length of geotextile is about 3~4 times of the loaded width for the effect to the bearing capacity improvement. Finally, the biggest tensile force of geotextile occurs at an edge of the uniform load.
Abstract
In generally, ground surface strengthening such as using geotextile is needed to secure trafficability of construction equipment. Several calculation methods for bearing capacity for very soft ground improved by geotextile have been proposed already but they are not established yet. In this paper, elastoplastic finite element analysis is carried out to estimate bearing capacity improvement for very soft ground reinforced by geotextile. In conclusion, by reinforcing with geotextile the bearing capacity improvement of very soft ground is increased with the increase of the settlement after yielding. And it is enough that the length of geotextile is about 3~4 times of the loaded width for the effect to the bearing capacity improvement. Finally, the biggest tensile force of geotextile occurs at an edge of the uniform load.
참고문헌 (4)
- iterative Solution Procedure that Handles Snap Through, "A Fast Incremental", pp.1981, Crisfield, M. A
- Japanese society of soil mechanics, "Design of Reclamation ground and soft ground reinforced by geotextile", Symposium paper about application properties of geotextile, pp.23~36 (1990)
- Japanese society of soil mechanics, "Symposium about Newest study and practical side for soft ground", From observation of microscopic structure to countermeasure technique for very soft ground, pp.104~111 (2002)
- Oritz, M, "An Analysis of a New Class of Integration Algorithms for Elasoplasic Constitutive Relations", International Journal for Numerical Method in Engineering, pp.353~366 (1986)