A METHOD FOR CALCULATING THE UNDRAINED STRENGTH RATIO, c_u/p, OF NORMALLY CONSOLIDATED CLAY MEASURED IN THE SIMPLE SHEAR TEST

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概要

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• This paper discusses a method for calculating the "true" undrained strength ratio, (c_u/p)_<SS>, of normally consolidated clays measured in a simple shear test. The proposed method assumes that the directions of the principal stress axes during the simple shear test are expressed by the relation proposed by Oda and Konishi (1974). Experimental results obtained from three types of clays confirm that the method gives more reasonable estimates of (c_u/p)_<SS> and the internal friction angle, φ'_<SS>, in terms of effective stress measured in the simple shear test compared to other methods. The method also supports Ladd's statement that (c_u/p)_<SS> should generally be less than (c_u/p)_<TC> determined from the triaxial compression test due to undrained strength anisotropy (Ladd, 1973). Finally, a significant disadvantage of the method proposed by Duncan and Dunlop (1969) is discussed, and it is pointed out that the Duncan and Dunlop method may predict values of φ'_<SS> for normally consolidated clay that are excessively high.

• 社団法人地盤工学会の論文
• 1981-03-15

著者

• 落合 英俊

  Department Of Civil Engineering Nagasaki University

関連論文

• ON THE STRESS-STRAIN BEHAVIOUR OF LIGHTLY CEMENTED CLAY BASED ON AN EXTENDED CRITICAL STATE CONCEPT
• DEM 解析によるジオグリッド補強砂の引抜き特性に関する一考察
• A METHOD FOR CALCULATING THE UNDRAINED STRENGTH RATIO, c_u/p, OF NORMALLY CONSOLIDATED CLAY MEASURED IN THE SIMPLE SHEAR TEST
• 直接セン断試験と平面ヒズミ試験における砂のセン断強度の関係
• 直接セン断試験における砂の挙動
• 粒状土の圧縮変形に及ぼす初期密度の影響
• 砂の静止土圧係数の算定式とN値を用いた静止土圧の計算法
• 奨励賞を受賞して
• ON THE RELATION τ/σ_N=K・tanψ IN THE SIMPLE SHEAR TEST
• 砂の静止土圧係数
• 直接セン断試験と平面ヒズミ試験における砂のセン断強度の関係
• 直接セン断試験における砂の挙動
• 粒状土の圧縮変形に及ぼす初期密度の影響

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