書誌事項
- タイトル別名
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- Multi-Hole Injection Type In-Situ Seepage Failure Test and Case Studies.
- タコウ チュウスイシキ ゲンイチ シントウ ハカイ シケン ノ テイアン ト
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抄録
Recently, in Japan, not a few dam sites are composed of soft and weak rocks or sand and gravel deposits. Since these dam foundations are low in strength, it is required to evaluate seepage failure potential in the designing stage.<BR>There are two types of seepage failure tests (SFT), that is, laboratory SFT for undisturbed specimens and in-situ SFT. Although in-situ test is more expensive than laboratory one, heterogeneity and existence of very weak part of foundation can be taken into account with in-situ test. Therefore, in-situ test can give us more realistic results than laboratory one. Conventional in-situ SFT is the test by use of the water injection from a single borehole (single-hole injection type in-situ SFT). However, because the water flow from a borehole is not onedimensionalbut radial, large potential loss takes place around a borehole. This seepage is much different from the under seepage in dam foundation, and the evaluation of critical hydraulic gradient is very difficult.<BR>In this paper, we have explained this problem about single-hole injection type in-situ SFT quantiatively by using a mathematical model. In addition, we have developed new in-situ SFT by use of the water injection from plural boreholes drilled on the line parallel to the open side plane (multi-hole injection type in-situ SFT) in order to establish approximate one-dimensional flow condition. We have shown the advantage of multi-hole injection type in-situ SFT by use of a mathematical model, and reported results of case study of this test.
収録刊行物
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- 応用地質
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応用地質 35 (5), 218-227, 1994
一般社団法人 日本応用地質学会
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詳細情報 詳細情報について
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- CRID
- 1390001204094758528
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- NII論文ID
- 110003334746
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- NII書誌ID
- AN00026635
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- ISSN
- 18840973
- 02867737
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- NDL書誌ID
- 3902891
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可
