多数アンカー式補強土壁の背面凍結と凍結土圧 [in Japanese] FREEZING FRONT AND FROST HEAVING PRESSURE IN MULTI ANCHORED RETAINING WALL [in Japanese]
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各種の補強材を用いた新しい土構造物が多く開発され実用に供されているが, 寒冷地における凍上対策を考慮した構造物はほとんど無く対策工法の検討が急がれている. 本研究では多数アンカー式補強土壁を試験設置し, 冬期間の背面盛土の凍結状況や壁面ブロックに加わる凍結土圧などの動態観測を4シーズンにわたって行った. 実験の結果凍結面形成や凍結土圧などの特性について, いくつかの有用な知見が得られた.
Various types of reinforced retaining walls have been recently developed and adopted. On these retaining walls, however, effects of frost heaving damage prevention measures have not yet been clarified. In this study, a full scale model of a multi-anchored retaining wall was installed in the field, and measurements were performed over four winter seasons. Following results were obtained; 1) measured freezing fronts were associated with measured freezing earth pressure on facing blocks; 2) earth pressure on facing block repeated seasonally between 40-50kpa in winter and 5-10kpa in melt season; and 3) the effectiveness of thermal insulation material and frost-nonsusceptible backfill against frost damage was evidently recognized.
- Proceedings of the Japan Society of Civil Engineers
Proceedings of the Japan Society of Civil Engineers 645, 281-290, 2000-03-21
Japan Society of Civil Engineers