Surface Cover Method as a Countermeasure to Protect Small Earth Dams against Heavy Rainfall and Wave Erosion

• HORI Toshikazu

  Department of Geotechnical and Hydraulic Engineering, National Institute for Rural Engineering, National Agriculture and Food Research Organization

• MOHRI Yoshiyuki

  Department of Geotechnical and Hydraulic Engineering, National Institute for Rural Engineering, National Agriculture and Food Research Organization

• TSUCHIHASHI Kazunori

  Maeda Kosen Corporation

• TAKAHASHI Hiroshi

  Maeda Corporation

• MAEDA Kazuyuki

  Maeda Corporation

Bibliographic Information

Other Title

• 堤体表面被覆によるため池の豪雨対策と波浪侵食対策
• ツツミ タイヒョウメン ヒフク ニ ヨル タメイケ ノ ゴウウ タイサク ト ハロウ シンショク タイサク

Abstract

Failures of old small earth dams occur frequently due to concentrated heavy rainfall, and it is necessary to reinforce these dams. On the other hand, lowering reinforcement costs is needed in terms of the Japanese financial situation. In this study, we developed a countermeasure to protect small earth dams against heavy rainfall and wave erosion at a low cost and a short-term construction period, namely the “Surface Cover Method”. In this method, erosion protection mats with impermeable sheets are spread from the upstream slope to the downstream slope of an embankment. We performed several model tests and revealed that this method effectively protects against rainfall infiltration, erosion by overtopping and wave erosion of the upstream slope, so is able to protect a dam from sliding, overtopping and wave erosion failure. From a construction test, the construction costs appear to be one third of conventional repair methods and the construction period is several weeks.

Journal

• Transactions of The Japanese Society of Irrigation, Drainage and Rural Engineering

  Transactions of The Japanese Society of Irrigation, Drainage and Rural Engineering 81 (3), 245-256, 2013

  The Japanese Society of Irrigation, Drainage and Rural Engineering

Keywords

• Small earth dam
• Countermeasure against heavy rainfall
• Sliding
• Overflow
• Wave erosion

Details

• CRID: 1390282680267076992
• NII Article ID: 130004951460
• NII Book ID: AA12240517
• DOI: 10.11408/jsidre.81.245
• ISSN: 18847242
• ISSN: 18822789
• NDL BIB ID: 024740403
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I024740403
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed