• Title/Summary/Keyword: 강성평가

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Performance Evaluation of Full Scale Reinforced Subgrade for Railroad with Rigid Wall Under Static Load (정하중 재하 시 실물 강성벽 일체형 철도보강노반의 성능평가)

  • Kim, Dae-Sang
    • Journal of the Korean Geosynthetics Society
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    • v.14 no.3
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    • pp.31-42
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    • 2015

  • The Reinforced subgrade for railroad (RSR) was constructed for one way railway line with the dimension of 5 m high, 6 m wide and 20 m long to evaluate its performance under train design load. The RSR has characteristics of short length (0.3-0.4 H) of reinforcement and rigid wall, 30 and 40 cm vertical spacing of reinforcement installation. To enhance economics and constructability, three kinds of connections (welding, hinge & bolt, bold wire) were also designed to realize the integration between rigid wall and reinforced subgrade. Two times of static loading tests were done on the full size railroad subgrade. The maximum applied pressure was 0.98 MPa (the maximum test load 5.88 MN), which corresponds to 19.6 times of the design load for railroad subgrade, 50 kPa. The performance on the RSR was evaluated with the safety on the failure, subgrade bearing capacity and settlement, horizontal displacement of wall, and reinforcement strain. Based on the full scale test, we confirmed that the RSR with the conditions of 0.35 H (35% of height) short reinforcement length, hinge & bolt type connection for integration between rigid wall and reinforced subgrade, and 40cm vertical spacing of reinforcement installment shows good performance under train design load.

  • https://doi.org/10.12814/jkgss.2015.14.3.031 인용 PDF KSCI