JP5559660B2 - 地盤の飽和度の測定方法 - Google Patents
地盤の飽和度の測定方法 Download PDFInfo
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- JP5559660B2 JP5559660B2 JP2010245280A JP2010245280A JP5559660B2 JP 5559660 B2 JP5559660 B2 JP 5559660B2 JP 2010245280 A JP2010245280 A JP 2010245280A JP 2010245280 A JP2010245280 A JP 2010245280A JP 5559660 B2 JP5559660 B2 JP 5559660B2
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- 238000000034 method Methods 0.000 title claims description 13
- 239000002689 soil Substances 0.000 title description 6
- 238000005553 drilling Methods 0.000 claims description 58
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 58
- 239000003673 groundwater Substances 0.000 claims description 37
- 238000002347 injection Methods 0.000 claims description 37
- 239000007924 injection Substances 0.000 claims description 37
- 239000000654 additive Substances 0.000 claims description 9
- 230000000996 additive effect Effects 0.000 claims description 8
- 238000000691 measurement method Methods 0.000 claims description 7
- 239000011148 porous material Substances 0.000 claims 1
- 238000005259 measurement Methods 0.000 description 6
- 239000004568 cement Substances 0.000 description 5
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 4
- 239000000440 bentonite Substances 0.000 description 4
- 229910000278 bentonite Inorganic materials 0.000 description 4
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 4
- 239000008399 tap water Substances 0.000 description 4
- 235000020679 tap water Nutrition 0.000 description 4
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000001768 carboxy methyl cellulose Substances 0.000 description 3
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 3
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 229910052956 cinnabar Inorganic materials 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 235000017557 sodium bicarbonate Nutrition 0.000 description 2
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 description 2
- 235000017550 sodium carbonate Nutrition 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000011882 ultra-fine particle Substances 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Geophysics And Detection Of Objects (AREA)
Description
削孔水A:水道水(比抵抗43.9Ωm)に重曹を0.15重量%添加して比抵抗を11.8Ωmに調整した。
削孔水B:水道水(比抵抗43.9Ωm)にCMCを0.2重量%添加して比抵抗を12.4Ωmに調整した。
削孔水C:水道水(比抵抗43.9Ωm)をそのまま使用した。
2 空気注入管
3 注入孔
4 空気供給管
5 電極ロッド
6 電極
7 演算装置
8 硅砂
9 BP(ベントナイトペレット)
10 超微粒子セメント
11 セメントベントナイト
H 長孔
W 削孔水
Claims (6)
- 砂質地盤中に設置した空気注入管を通じて空気を注入した砂質地盤の飽和度を、地盤を削孔した長孔の中に設置した電極の間で検知した比抵抗に基づいて測定する地盤の飽和度の測定方法において、現場地下水の比抵抗に対して予め設定された許容範囲内の比抵抗を有する削孔水を使用して、削孔ロッドによって前記長孔を削孔することを特徴とする地盤の飽和度の測定方法。
- 予め用意した削孔水と現場地下水との比抵抗を比較し、両者の比抵抗の差が予め設定された許容範囲内であれば、その削孔水を使用して前記長孔を削孔し、両者の比抵抗の差が前記許容範囲外であれば、その削孔水に添加物を混合することにより、現場地下水との比抵抗の差を前記許容範囲内に調整し、この調整した削孔水を使用して前記長孔を削孔する請求項1に記載の地盤の飽和度の測定方法。
- 前記削孔水に現場地下水を使用する請求項1に記載の地盤の飽和度の測定方法。
- 前記空気注入管に上下方向に間隔をあけて複数の電極を取り付け、前記長孔を間隔をあけて複数削孔し、それぞれの長孔の中に前記空気注入管を設置することにより、長孔の中に上下方向に間隔をあけて複数の電極を設置し、これら電極の間で検知した比抵抗に基づいて、地盤の飽和度を測定する請求項1〜3のいずれかに記載の地盤の飽和度の測定方法。
- 地盤中に設置した前記空気注入管を中心にして前記長孔を複数削孔し、それぞれの長孔の中に、上下方向に間隔をあけて複数の電極を取り付けた電極ロッドを設置することにより、長孔の中に上下方向に間隔をあけて複数の電極を設置し、これら電極の間で検知した比抵抗に基づいて、地盤の飽和度を測定する請求項1〜3のいずれかに記載の地盤の飽和度の測定方法。
- 前記許容範囲が、現場地下水の比抵抗の±20%である請求項1〜5のいずれかに記載の地盤の飽和度の測定方法。
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JP2010245280A JP5559660B2 (ja) | 2010-11-01 | 2010-11-01 | 地盤の飽和度の測定方法 |
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JP2010245280A JP5559660B2 (ja) | 2010-11-01 | 2010-11-01 | 地盤の飽和度の測定方法 |
Publications (2)
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JP2012097445A JP2012097445A (ja) | 2012-05-24 |
JP5559660B2 true JP5559660B2 (ja) | 2014-07-23 |
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JP2010245280A Active JP5559660B2 (ja) | 2010-11-01 | 2010-11-01 | 地盤の飽和度の測定方法 |
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Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5933225B2 (ja) * | 2011-11-11 | 2016-06-08 | 株式会社不動テトラ | 地盤中への空気注入方法 |
CN105158301A (zh) * | 2015-10-16 | 2015-12-16 | 上海岩土工程勘察设计研究院有限公司 | 基于跨孔电阻率ct法的污染土检测方法 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3788234B2 (ja) * | 2000-12-19 | 2006-06-21 | 株式会社大林組 | 地盤の調査方法 |
JP5031278B2 (ja) * | 2006-06-30 | 2012-09-19 | 中央開発株式会社 | 無菌無酸素コアの採取加工方法及びそのシステム |
JP5132605B2 (ja) * | 2009-02-19 | 2013-01-30 | 株式会社竹中工務店 | 空気注入装置、空気注入システム、及び地盤への空気注入方法 |
JP5350038B2 (ja) * | 2009-03-26 | 2013-11-27 | 独立行政法人水資源機構 | 電気探査比抵抗法 |
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