A Rational Estimating Method of the Earth Pressure on a Shaft Wall considering the Shape Ratio

earth pressure acting on a circular shaft wall is smaller than that acting on the wall in plane strain condition due to the three dimensional axi-symmetric arching effect. Accurate estimation of the earth pressure is required for the design of the shaft wall. In this study, the stress model considering the decrease of earth pressure due to the horizontal and vertical arching effect and the influence of shape ratio (shaft height/radius) is proposed. In addition, model test on the sandy soil is conducted and a comparison is made between the stress model and the test results. The comparison shows that the proposed stress model is in agreement with test results; decrease of shape ratio (increase of radius) leads to stress state equal to the plane strain condition and approximate stress distribution is found between stress model and model test results.

keywords: 원형수직구, 원통형 벽체, 아칭효과, 토압, 벽체형상비, Shaft, cylindrical retaining wall, arching effect, earth pressure, shape ratio, Shaft, cylindrical retaining wall, arching effect, earth pressure, shape ratio

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Article Contents

Vol.9 No.2

A Rational Estimating Method of the Earth Pressure on a Shaft Wall considering the Shape Ratio

Abstract

Reference

(사)한국터널지하공간학회