EARTHQUAKE-PROOF REINFORCEMENT BY STEEL INSERTING METHOD ON SHEAR FORCE FOR WALL OF EXCAVATION STRUCTURE

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  • YAMAMURA Kensuke
    社団法人 土木学会 日本工営株式会社 海外カンパニーエネルギー開発部
  • KIYOMIYA Osamu
    早稲田大学 理工学部社会環境工学科

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Other Title
  • 開削トンネル擁壁部のせん断力に対する鉄筋差込による耐震補強方法
  • カイサク トンネル ヨウヘキブ ノ センダンリョク ニ タイスル テッキン サシコミ ニ ヨル タイシン ホキョウ ホウホウ

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For level 2 design earthquakes, shear properties of the reinforced concrete sidewall of the excavation portion in the U-type cross section of the existing tunnel is studied. The cross-sectional forces are calculated by dynamic response analysis considering material non-linearity. Calculation results show the destructive mode at side wall is shear type, and shear reinforcement is required to increase shear strength of the wall<br>However, there is no appropriate counter measure about how to reinforce these structures. Therefore we propose the new reinforcement method by SHEAR STEEL RODS EMBEDDING. Holes are drilled at the sidewall, the steel rods are put in and embed with fixate. Static monotolic loading tests and reversal cyclic loading tests verify the efficiency of the embed steel rods for shear reinforcement.

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