A STUDY ON EARTH PRESSURE AT EQUILIBRIUM AND HORIZONTAL SUBGRADE REACTION COEFFICIENT OF AN EARTH WALL EMBEDMENT IN BRACED EXCAVATION WORK ON CLAYEY SOIL

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  • Nakamura Hyoji
    社団法人 土木学会 パシフィックコンサルタンツ株式会社 取締役総合研究所
  • Hirashima Kenichi
    社団法人 土木学会 山梨大学工学部土木環境工学科

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  • 粘性土地盤における掘削土留め壁根入れ部の平衡土圧と水平地盤反力係数に関する研究
  • ネンセイド ジバン ニ オケル クッサク ドドメヘキ ネイレブ ノ ヘイコウ

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Abstract

The ground spring method used for calculation the stress and deformation of the earth-retaining wall for braced excavation must express the load and resistance on the ground of the excavated side while simulating them in accordance with the actual ground condition, in addition to expressing the earth pressure on the back side. To express the load and resistance of the excavated side it is necessary to enter the earth pressure at equilibrium, the horizontal subgrade reaction coefficient, and the passive earth pressure. The earth pressure at equilibrium and horizontal subgrade reaction coefficient are used to express the load and resistance when the ground of the excavated side is in elastic state while the passive earth pressure is used when the above described soil is in plastic state.<br>This paper studies the earth pressure at equilibrium and horizontal subgrade reaction coefficient while using the elastic finite element method. The calculation equation, which includes factors with substantial influence, are proposed on the basis of the above study. Then, through comparison of the proposed equation with existing studies and with mesured value it was confirmed that the proposed equation are practically applicable.

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