JPS60100737A - Partial freeze sampling - Google Patents
Partial freeze samplingInfo
- Publication number
- JPS60100737A JPS60100737A JP20869983A JP20869983A JPS60100737A JP S60100737 A JPS60100737 A JP S60100737A JP 20869983 A JP20869983 A JP 20869983A JP 20869983 A JP20869983 A JP 20869983A JP S60100737 A JPS60100737 A JP S60100737A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- freeze
- heat insulating
- cryotube
- diameter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005070 sampling Methods 0.000 title claims abstract description 12
- 230000008014 freezing Effects 0.000 claims abstract description 19
- 238000007710 freezing Methods 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 15
- 239000003507 refrigerant Substances 0.000 claims abstract description 4
- 239000002689 soil Substances 0.000 claims description 15
- 238000005553 drilling Methods 0.000 claims 2
- 239000004576 sand Substances 0.000 claims 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
- 239000007788 liquid Substances 0.000 abstract description 4
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 4
- 238000002347 injection Methods 0.000 abstract description 3
- 239000007924 injection Substances 0.000 abstract description 3
- 229920003002 synthetic resin Polymers 0.000 abstract description 2
- 239000000057 synthetic resin Substances 0.000 abstract description 2
- 239000011521 glass Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000012520 frozen sample Substances 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
- E21B25/08—Coating, freezing, consolidating cores; Recovering uncontaminated cores or cores at formation pressure
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Sampling And Sample Adjustment (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
Description
【発明の詳細な説明】
大型の構造物を建設する時など地盤の変形特性を知るた
めに、従来から各棟のサンプリング方法が行われている
。サンプリングされた試料から変形特性を知るためには
、乱されていないことが垂侠である。その点での問題は
粘土層では少ないが、砂地盤の場合には通常のサンプラ
ーでは密度はもちろんのこと地中応力の状態から変化さ
せないでサンプリングすることは事笑上不ｏＪ能であっ
た１０そこで本願出願人は土層を凍結してサンプリング
する方法を開発してきた。すなわち、第１図Ａ〜Ｄに示
す如く、（５）ポーリング孔ｌに先端の閉じた凍結管２
を挿入し、（ハ）その中に液体屋素などの冷媒を供給管
３を通して供給し、凍結管２の周囲の土層４を凍結させ
、（Ｑ凍結管２の周囲をケーシング５で掘削し、（Ｄ）
凍結土柱６を引き抜く、という方法である。この方法に
よればイ＜４られた凍結試料は原位置における密度の保
持のみでなく、地中応力を解放しない状態でサンプリン
グが可能であり、良質な乱さない試Ｊコ）が採取できる
。[Detailed Description of the Invention] In order to know the deformation characteristics of the ground when constructing a large structure, a sampling method for each building has been conventionally used. In order to know the deformation characteristics from the sampled specimen, it is essential that it is undisturbed. In this respect, there are fewer problems with clay layers, but in the case of sandy soil, it is virtually impossible to sample sandy soil with a normal sampler without changing the density or the stress state10. Therefore, the applicant has developed a method of freezing and sampling the soil layer. That is, as shown in FIGS. 1A to 1D, (5) a freezing tube 2 with a closed tip is inserted into the polling hole l.
(c) Supply a refrigerant such as liquid nitrogen through the supply pipe 3 to freeze the soil layer 4 around the freezing pipe 2, and (Q) excavate the area around the freezing pipe 2 with the casing 5. ,(D)
This method involves pulling out the frozen soil pillar 6. According to this method, the frozen sample not only maintains its density in situ, but also can be sampled without releasing the underground stress, and a high-quality undisturbed specimen can be collected.
本発明はこの様な凍結サンプリングの方法を任意の深さ
でサンプリングするため開発されたものである。すなわ
ち第１図に示した凍結サンプリング方法では地表から凍
結管の先端の深さまで凍結させるので、深い部分の土層
の状態を調べる場合にも地表から所定の深さまで凍結さ
せることが必要であるため、大量の冷媒を必要とし、ま
た、土層の引き上げも長い土柱となって保集は困難であ
った。The present invention has been developed to enable sampling at an arbitrary depth using such a frozen sampling method. In other words, the freezing sampling method shown in Figure 1 freezes from the ground surface to the depth of the tip of the freezing tube, so when investigating the condition of deep soil layers, it is necessary to freeze from the ground surface to a predetermined depth. However, a large amount of refrigerant was required, and the soil layer had to be pulled up into long columns, making collection difficult.
本発明はこうした問題点を解決したものであって、以下
第２図乃至第１１図に沿って本発明に従うす／！クリン
グ法を説明する。The present invention solves these problems, and the present invention will be followed in accordance with FIGS. 2 to 11 below. Explain the Kling method.
（５）第２図及び第３図の工程：必要とする深さ付近ま
で大口径の孔１ｏを掘削し、その内側にケーシング１１
を挿入する。(5) Steps in Figures 2 and 3: A large-diameter hole 1o is excavated to around the required depth, and a casing 11 is placed inside it.
Insert.
ｆＢ）第４図の工程：ポーリングロッド１２にセンター
ライザー１３を取り付け、そのセンターライｆ−１３に
よって中心合せをした小口径のコアチューブ１４で孔１
０の底から更に掘削する。fB) Process shown in Fig. 4: Attach the center riser 13 to the polling rod 12, and use the small diameter core tube 14 centered by the center riser f-13 to open the hole 1.
Drill further from the bottom of 0.
ｔｃ） 第５図の工程：断熱管１６の先に小口径凍結管
１７を切り離し可能に連結し、凍結管１７の部分が小口
径の孔１５に挿入されるように設置する。また、断熱管
１６と凍結管１７はネジ止めで連結する。断熱管１６は
管の周囲をグラスウールで囲い、さらに二重管とする。tc) Process shown in FIG. 5: A small-diameter freezing tube 17 is detachably connected to the tip of the heat-insulating tube 16, and installed so that a portion of the freezing tube 17 is inserted into the small-diameter hole 15. Further, the heat insulating pipe 16 and the freezing pipe 17 are connected with screws. The heat insulating pipe 16 is made into a double pipe by surrounding the pipe with glass wool.
凍結管１７の先端には凍結温度！理のため、凍結管１７
と同径の塩ビ製（その他の合成樹脂を含む）丸棒に温度
計１８を取り付は凍結の管理を行う。Freezing temperature at the tip of freezing tube 17! For maintenance, cryotube 17
A thermometer 18 is attached to a round rod made of PVC (including other synthetic resins) with the same diameter to control freezing.
（Ｄ） 第６図の工程：凍結管１７へ液体窒素を注入す
るための注入管１９を断熱管１６内に挿入する。(D) Step in FIG. 6: The injection tube 19 for injecting liquid nitrogen into the freezing tube 17 is inserted into the heat insulating tube 16.
（５）第７図及び第８図の工程：液体窒素を注入して凍
結管１７周囲の土層２０を凍結する。この場合、断熱管
１６の周囲の地下水の凍結を防ぐため送水管２４を介し
て水を循環させる。(5) Steps shown in FIGS. 7 and 8: Liquid nitrogen is injected to freeze the soil layer 20 around the freezing tube 17. In this case, water is circulated through the water pipe 24 to prevent underground water around the heat insulated pipe 16 from freezing.
［Ｆ］ 第９図の工程：凍結管］７がら断熱管１６を切
り離す。[F] Step in FIG. 9: Freezing tube] Cut off the heat insulating tube 16 from 7.
ｆＧ） 第１０図の工程二コアチューブ２２により凍結
管１６を取シ囲む形で凍結±２０を掘削する。fG) In the process shown in FIG. 10, two core tubes 22 are used to excavate the freeze tube 16 in a manner surrounding the freeze tube 16.
そして凍結管１７の上端に引き上げＬＩＪのロッド２３
を連結する。Then, lift the LIJ rod 23 to the upper end of the cryotube 17.
Concatenate.
■ 第１１図の工程：コアチューブ２２内の凍結した土
層２０をコアチューブ２２及び凍結管１７と共に引き上
げる。11: The frozen soil layer 20 inside the core tube 22 is pulled up together with the core tube 22 and the frozen tube 17.
以上述べた様な工程により、所定の深さの部分土層につ
いて凍結された状態で乱されていない試料を採取するこ
とができる。Through the steps described above, a frozen, undisturbed sample of a partial soil layer at a predetermined depth can be collected.
第１図Ａ−Ｄは一般的な凍結サンプリング方法の説明図
である。
第２図乃至第１１図は本発明に従うサンプリング方法の
説明図である。
符号の説明
１・・・ポーリング孔、２．１７・・・凍結管、３・・
・供給管、４．２０・・・凍結土層、５．１１・・・ケ
ーシング、６・・・凍結土柱、１０・・・孔、１２・・
・ポーリングロッド％ １３・・・センターライザー、
１４・・・小口径のコアチューブ、１５・・・小口径の
孔、１６・・・断熱管、１８・・・温度計％ １９・・
・注入管、２１・・・送水管、２２・・・大口径のコア
チューブ、２３・・・引き上げ用ロッド。
（Ａ） （Ｂ） （Ｃ） （Ｄ）
第２図 第３図
第、ウ 第５図
第６図 第７図
ｑ
第２図 第９１菌
番
第１０図 ｉ”； ｌ １．；１）
手 続 補 正 組方式）
％式％
２、発明の名称
部分凍結サンプリング
３、補正をする者
事件との関係 特許出願人
住所 東京都目黒区来が丘二丁目１１番１６号４、代理
人
住所 東京都中央区銀座８丁目１０否８号昭和５９年２
月８日
６− 補正の対訣
明細書の「図面の簡単な説明」の欄
７、 補正の内容FIGS. 1A-1D are explanatory diagrams of a general cryo-sampling method. 2 to 11 are explanatory diagrams of the sampling method according to the present invention. Explanation of symbols 1...poling hole, 2.17...freezing tube, 3...
・Supply pipe, 4.20... Frozen soil layer, 5.11... Casing, 6... Frozen soil column, 10... Hole, 12...
・Poling rod% 13...Center riser,
14...Small diameter core tube, 15...Small diameter hole, 16...Insulated tube, 18...Thermometer% 19...
- Injection pipe, 21... Water pipe, 22... Large diameter core tube, 23... Pulling rod. (A) (B) (C) (D) Fig. 2 Fig. 3 Fig. 3 Fig. 5 Fig. 6 Fig. 7 q Fig. 2 Fig. 91 Bacteria number Fig. 10 i”; l 1.; 1) % formula % 2, Partial frozen sampling of the title of the invention 3, Relationship with the case of the person making the amendment Patent applicant address: 2-11-16-4 Kurigaoka, Meguro-ku, Tokyo; Agent address: No. 8, Ginza 8-10, Chuo-ku, Tokyo 1982 2
May 8, 6 - Column 7 of "Brief explanation of drawings" in the description of the amendment, Contents of the amendment
Claims (1)
グ孔を掘削する工程と、該第−のポーリング孔底から比
較的小口径の第二のポーリング孔を掘削する工程と、凍
結管と断熱管を連結したものを該凍結管が該第二のポー
リング孔に挿入されるように設置する工程と、該凍結管
に冷媒を導入して該凍結管の周囲の土層を凍結させる工
程と。 凍結土の温度管理の工程と、該断熱管を該凍結管から切
シ離す工程と、比較的大口径のコアチューブで該凍結管
の周囲を掘削する工程と、該コアチューブ内の土層を該
凍結管と共に引き上げる工程とから成る任意の深さに於
ける砂層の部分凍結サンプリング方法。[Claims] A step of drilling a first poling hole of a relatively large diameter to a certain depth from the ground surface, and a step of drilling a second poling hole of a relatively small diameter from the bottom of the second polling hole. a step of installing a coupled cryotube and an insulated pipe so that the cryotube is inserted into the second poling hole; and a step of introducing a refrigerant into the cryotube to remove a layer of soil around the cryotube. and the process of freezing. A step of controlling the temperature of the frozen soil, a step of separating the insulated tube from the frozen tube, a step of excavating around the frozen tube with a relatively large diameter core tube, and a step of removing the soil layer inside the core tube. A method for partially frozen sampling of a sand layer at an arbitrary depth, comprising the step of lifting the cryotube together with the cryotube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20869983A JPS60100737A (en) | 1983-11-07 | 1983-11-07 | Partial freeze sampling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20869983A JPS60100737A (en) | 1983-11-07 | 1983-11-07 | Partial freeze sampling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60100737A true JPS60100737A (en) | 1985-06-04 |
| JPH0317036B2 JPH0317036B2 (en) | 1991-03-07 |
Family
ID=16560607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20869983A Granted JPS60100737A (en) | 1983-11-07 | 1983-11-07 | Partial freeze sampling |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60100737A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015013394A (en) * | 2013-07-03 | 2015-01-22 | 独立行政法人石油天然ガス・金属鉱物資源機構 | Cutting device, sample collection system, and sample collection method |
| CN104458317A (en) * | 2014-09-19 | 2015-03-25 | 航天东方红卫星有限公司 | Weak gravity celestial body rock shock-chilling sampling method |
| JP2020012771A (en) * | 2018-07-20 | 2020-01-23 | 基礎地盤コンサルタンツ株式会社 | Ground sample sampling method and sampling device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3221558A (en) * | 1963-05-31 | 1965-12-07 | Kennecott Copper Corp | Sampling method and apparatus |
| JPS4924707A (en) * | 1972-07-10 | 1974-03-05 |
-
1983
- 1983-11-07 JP JP20869983A patent/JPS60100737A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3221558A (en) * | 1963-05-31 | 1965-12-07 | Kennecott Copper Corp | Sampling method and apparatus |
| JPS4924707A (en) * | 1972-07-10 | 1974-03-05 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015013394A (en) * | 2013-07-03 | 2015-01-22 | 独立行政法人石油天然ガス・金属鉱物資源機構 | Cutting device, sample collection system, and sample collection method |
| CN104458317A (en) * | 2014-09-19 | 2015-03-25 | 航天东方红卫星有限公司 | Weak gravity celestial body rock shock-chilling sampling method |
| JP2020012771A (en) * | 2018-07-20 | 2020-01-23 | 基礎地盤コンサルタンツ株式会社 | Ground sample sampling method and sampling device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0317036B2 (en) | 1991-03-07 |
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