Study on Changes of Pore Structure and Water Flow in Weathered Bedrock due to Freeze and Thaw Action

• IZUMIYAMA, Hiroaki

• TSUTSUMI, Daizo

• FUJITA, Masaharu

Bibliographic Information

Other Title

• 凍結融解による風化基岩の間隙構造の変化と水分移動に関する研究

Abstract

In order to explain the mechanism of the breakdown of weathered bedrock due to freeze and thaw action, some experiments relating to the pore structure were conducted using weathered granite rocks sampled in Tanakami Mountain, Shiga prefecture. It is cleared that the porosity of weathered granite gradually increased because of freeze and thaw action and the ice lens developed under conditions that water supply is enough and the porosity is larger than a threshold value. In addition, the water flow during freezing and the heat transfer considering the depth distribution of volumetric water content was simulated. It is also showed that the water flow from unfrozen layer to frozen layer and the importance of water content at heat transfer analysis.

Journal

• Disaster Prevention Research Institute Annuals. B

  Disaster Prevention Research Institute Annuals. B 52 (B), 659-672, 2009-06-01

  京都大学防災研究所

Keywords

• freeze and thaw
• rock breakdown
• pore structure
• water flow

Details

• CRID: 1050282676671389696
• NII Article ID: 120002515032
• NII Book ID: AN00027784
• ISSN: 0386412X
• HANDLE: 2433/129282
• Text Lang: ja
• Article Type: departmental bulletin paper
• Data Source:
  • IRDB
  • CiNii Articles