JP4800878B2 - Detection method of sand content change and mud flow rate in circulating mud - Google Patents
Detection method of sand content change and mud flow rate in circulating mud Download PDFInfo
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- JP4800878B2 JP4800878B2 JP2006226797A JP2006226797A JP4800878B2 JP 4800878 B2 JP4800878 B2 JP 4800878B2 JP 2006226797 A JP2006226797 A JP 2006226797A JP 2006226797 A JP2006226797 A JP 2006226797A JP 4800878 B2 JP4800878 B2 JP 4800878B2
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- flow rate
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- pipeline
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- 239000004576 sand Substances 0.000 title claims description 27
- 238000001514 detection method Methods 0.000 title 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 28
- 239000007788 liquid Substances 0.000 claims description 16
- 230000000087 stabilizing effect Effects 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 4
- 238000011084 recovery Methods 0.000 claims description 4
- 238000007796 conventional method Methods 0.000 description 5
- 238000000926 separation method Methods 0.000 description 4
- 229910000278 bentonite Inorganic materials 0.000 description 3
- 239000000440 bentonite Substances 0.000 description 3
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical group O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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- Piles And Underground Anchors (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
- Measuring Volume Flow (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Description
本発明は、基礎杭の掘削孔等内に生じる泥水を、ポンプと水槽の間で循環させ、循環している泥水中の砂分の変化と泥水の流量を検出する方法に関する。 The present invention relates to a method of circulating mud generated in a drill hole or the like of a foundation pile between a pump and a water tank, and detecting a change in sand content in the circulating mud and a flow rate of the mud.
第１の従来の技術として、電気比抵抗センサーを使用する安定液のスライム管理システムについて、本出願前に頒布された刊行物を引用して説明する（例えば、特許文献１参照。）。 As a first conventional technique, a slime management system for a stabilizing solution using an electrical resistivity sensor will be described with reference to publications distributed before the present application (see, for example, Patent Document 1).
図４に示されるように、スライム処理用ポンプ２１のケーシング２２を支持する支持台２３には、電気比抵抗センサー２４が取り付けられ、電気比抵抗センサー２４は計測ケーブル２５に接続される。ポンプ２１の吐出能力は、５０〜６０ｍ３／時間である。
As shown in FIG. 4, an
電気比抵抗センサー２４を取り付ける構造は、Ｌ型アングル材を採用する。
The structure for attaching the
電気比抵抗センサーで得られる比抵抗（Ω・ｍ）とは、場所打ちコンクリート杭などの造成時における孔壁の崩壊防止や地下水の湧出などを防ぐために多く用いられているベントナイト泥水（比重は１．１〜１．４程度）の濃度や砂分量に比例して変化することを利用するもので、一般的に砂分率（量）が増えると、比抵抗は大きくなる。 The specific resistance (Ω · m) obtained by the electrical resistivity sensor is bentonite mud (a specific gravity of 1), which is often used to prevent the collapse of hole walls and the outflow of groundwater during the construction of cast-in-place concrete piles. .About.1.4 to about 1.4) and changes in proportion to the amount of sand. Generally, when the sand content (amount) increases, the specific resistance increases.
第２の従来の技術として、砂分離槽について、本出願前に頒布された刊行物を引用して説明する（例えば、特許文献２参照。）。 As a second conventional technique, a sand separation tank will be described with reference to a publication distributed before the present application (see, for example, Patent Document 2).
この技術は、建築、土木工事における現場築造杭、地中連続壁等に使用される砂分が多いベントナイト安定液時の粘土を含む水から、砂を分離する分離槽に関するものである。 This technology relates to a separation tank that separates sand from water containing clay in a bentonite stabilizing liquid with a high amount of sand used for construction piles, onsite construction piles, and underground continuous walls.
前記安定液等のうち、砂分離機３５で分離された砂分の混入が少ない液は、直接水槽３１，３２に流入し、砂分が多く混入している液は、受樋３６上を案内されて流れ、砂分外部排出管３７を通して外部に設置された別個の槽（図示せず）に一旦排出される。そして、外部に一旦排出されて別個の槽に溜まった液の大半は、水中ポンプにより水槽３１，３２に還流される。したがって、外部には砂分のみが、排出されることになる。各水槽３１，３２の下部には、砂分等が溜まり難くするためにテーパー３３を４面に付け、また、底部には、水中ポンプにより液を排出し易くするためにピット３４を２箇所設ける。
Among the above-mentioned stabilizing liquids, the liquid with a small amount of sand separated by the
前記第１の従来の技術では、ポンプのケーシングを支持する支持台に電気比抵抗センサーを取り付けているので、取付け作業が煩雑であり、また、電気比抵抗センサーが故障した場合、修理に長い時間を必要とする不都合が生じている。 In the first conventional technique, since the electrical resistivity sensor is attached to the support that supports the pump casing, the installation work is complicated, and if the electrical resistivity sensor fails, it takes a long time to repair. Inconvenience is required.
また、前記第１の従来の技術では、ポンプの作動中に、スライムの処理状況を比抵抗と経過時間との関係から知ることができる。しかし、安定液の流量を知ることができない。 In the first conventional technique, the slime processing state can be known from the relationship between the specific resistance and the elapsed time during the operation of the pump. However, the flow rate of the stabilizing liquid cannot be known.
そこで、本発明は、前記第１の従来の技術の欠点を改良し、センサーを泥水が流れる管路の取付け取外しが容易な箇所に取付けることによって、循環泥水中の砂分変化と泥水流量を検出する方法を提供しようとするものである。 Therefore, the present invention improves the drawbacks of the first prior art and detects changes in sand content and the flow rate of the mud in the circulating mud by attaching the sensor to a place where the mud can flow easily. Is to provide a way to do.
本発明は、前記課題を解決するため、次の手段を採用する。 The present invention employs the following means in order to solve the above problems.
スライム処理用ポンプと回収水槽の間を、管路によって循環するように連絡し、前記スライム処理用ポンプによって吸い上げられた泥水が流れる前記管路の地上箇所に第１の電気比抵抗センサーと流量センサーを設置して前記第１の電気比抵抗センサーで検出した電気比抵抗と前記流量センサーで計測された流量の関係に基づいて前記泥水中に含まれる砂分変化を検出できるようにすると共に、前記回収水槽から補充される安定液が流れる前記管路の第２の地上箇所に第２の電気比抵抗センサーを設置して前記第１の電気比抵抗センサーで検出した電気比抵抗と前記第２の電気比抵抗センサーで検出した電気比抵抗とを比較して前記安定液の状況を把握できるようにした循環泥水中の砂分変化と泥水流量の検出方法。 Scan lime processing pump and between the recovery water tank, contact to thus circulate in the pipeline, the first electric ratio in the land mentioned office of the conduit through which the mud sucked up by the slime treatment pump detecting a sand fraction change contained in said mud based on the resistance sensor and flow sensor over the installation to the first electrical resistivity sensor at the detected electrical resistivity and the flow sensor in the measured flow rate relationship The second electrical resistivity sensor is installed at the second ground location of the pipeline through which the stabilizing liquid replenished from the recovered water tank flows, and the electricity detected by the first electrical resistivity sensor A method for detecting a change in sand content and a mud flow rate in a circulating mud so that the state of the stabilizing liquid can be grasped by comparing a specific resistance with an electric specific resistance detected by the second electric specific resistance sensor .
明細書の説明から理解することができるように、本発明は、次の効果を奏する。 As can be understood from the description of the specification, the present invention has the following effects.
１．電気比抵抗センサーを、第１の従来の技術では、ポンプのケーシングを支持する支持台に取り付けているが、本発明は、管路の地上箇所に設置するので、着脱が簡易である。 1. In the first conventional technique, the electrical resistivity sensor is attached to a support base that supports the casing of the pump. However, since the present invention is installed at the ground location of the pipeline, it is easy to attach and detach.
２．電気比抵抗センサーと流量センサーを併用するので、循環泥水中の砂分変化と泥水流量の関係をリアルタイムに知ることができる。 2. Since electric resistivity sensor and flow rate sensor are used together, it is possible to know in real time the relationship between sand content change and mud flow rate in circulating mud.
３．スライム処理用ポンプによって吸い上げられた泥水が流れる管路の第１の地上箇所と、回収水槽から補充される安定液が流れる管路の第２の地上箇所に、それぞれ電気比抵抗センサーを設置するので、安定液の状況を把握し易い。 3. Since electrical resistivity sensors are installed at the first ground location of the pipeline where the mud collected by the slime treatment pump flows and the second ground location of the pipeline where the stable liquid replenished from the recovered water tank flows. Easy to grasp the status of the stabilizer.
本発明の一実施例の循環泥水中の砂分変化と泥水流量の検出方法について説明する。 A method for detecting sand content change and mud flow rate in circulating mud according to an embodiment of the present invention will be described.
本発明の実施例１について図１〜図３を参照して説明する。 A first embodiment of the present invention will be described with reference to FIGS.
図１は、本発明の実施例１の要部の模式図である。詳細は図３を参照して後述するが、杭孔底からスライム処理を目的としてスライム処理用ポンプ４によって吸い上げられ、管路１を流れる泥水は、回収水槽５の手前で電気比抵抗値と流量を計測される。また、同時に回収水槽５から補充される安定液の電気比抵抗値も計測される。
FIG. 1 is a schematic diagram of a main part of the first embodiment of the present invention. Although details will be described later with reference to FIG. 3, the muddy water sucked up by the slime treatment pump 4 from the bottom of the pile hole for the purpose of slime treatment and flowing through the
管路１における地上箇所に電気比抵抗センサー２と流量センサー３を設置する。電気比抵抗センサー２と流量センサー３を、接近して配置しても、離隔して配置しても、所期の目的を達成することができる。
An
図２は、管路１を循環する泥水中に含まれる砂分率のグラフであり、横軸が管路１を循環する泥水の流量（ｍ３）、縦軸が電気比抵抗センサー２により検出される電気比抵抗（Ω・ｍ）を、それぞれ示す。曲線は、泥水の流量の増加に応じて電気比抵抗が減小する状況を示す。破線は、泥水中に含まれる砂分がほぼ零になるときの電気比抵抗を示す。
FIG. 2 is a graph of the percentage of sand contained in the mud circulating in the
図３は、管路１における地上箇所に電気比抵抗センサー２と流量センサー３が設置された状態を示す模式的斜視図である。
FIG. 3 is a schematic perspective view showing a state in which the
管路１によってスライム処理用ポンプ４と回収水槽５の間を連絡する。スライム処理用ポンプ４と地上６の間には、掘削孔７が設けられる。
The
電気比抵抗センサー２と流量センサー３を管路１における第１の地上箇所１ａに設置する。
The
また、電気比抵抗センサー２を管路１における第２の地上箇所１ｂに設置する。このように、２箇所に電気比抵抗センサー２を設置すると、スライム処理用ポンプ４による吸い上げ時の泥水の電気比抵抗値と、水中ポンプ等による回収水槽５から補充時の安定液の電気比抵抗値を比較することができるため、安定液の状況を把握し易い。
In addition, the
なお、スライム処理用ポンプ４によって吸い上げられた泥水の一部は、回収水槽５に回収され、残部は、管路１から排出されて廃棄される。また、回収水槽５内においては、回収された泥水中の砂やごみ等は、第２の従来の技術の砂分離槽、振動ふるい及びサイクロン等によって選別の上、排出されて廃棄される。更に、回収水槽５内においては、回収された泥水とベントナイトが調合され、新たな安定液が生成される。
A part of the muddy water sucked up by the slime treatment pump 4 is recovered in the
１ 管路
１ａ 第１の地上箇所
１ｂ 第２の地上箇所
２ 電気比抵抗センサー
３ 流量センサー
４ スライム処理用ポンプ
５ 回収水槽
６ 地上
７ 掘削孔
DESCRIPTION OF
Claims (1)
前記スライム処理用ポンプによって吸い上げられた泥水が流れる前記管路の地上箇所に第１の電気比抵抗センサーと流量センサーを設置して前記第１の電気比抵抗センサーで検出した電気比抵抗と前記流量センサーで計測された流量の関係に基づいて前記泥水中に含まれる砂分変化を検出できるようにすると共に、前記回収水槽から補充される安定液が流れる前記管路の第２の地上箇所に第２の電気比抵抗センサーを設置して前記第１の電気比抵抗センサーで検出した電気比抵抗と前記第２の電気比抵抗センサーで検出した電気比抵抗とを比較して前記安定液の状況を把握できるようにした
ことを特徴とする循環泥水中の砂分変化と泥水流量の検出方法。 Contact between the slime treatment pump and the recovery water tank so that it circulates through a pipeline.
The electrical resistivity and the flow rate detected by the first electrical resistivity sensor by installing a first electrical resistivity sensor and a flow rate sensor at the ground location of the pipeline through which the muddy water sucked up by the slime treatment pump flows. A change in sand content contained in the muddy water can be detected based on the relationship of the flow rate measured by the sensor, and the second ground location of the pipeline through which the stable liquid replenished from the recovered water tank flows is provided. The electrical resistivity detected by the first electrical resistivity sensor and the electrical resistivity detected by the second electrical resistivity sensor are compared with each other to determine the state of the stabilizing liquid. A method for detecting sand content change and mud flow rate in circulating mud characterized by being able to grasp .
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2010185313A (en) * | 2009-02-10 | 2010-08-26 | Hoei Sangyo Kk | Slime treatment device |
| CN115032108B (en) * | 2022-08-04 | 2022-11-18 | 徐州徐工基础工程机械有限公司 | Mud sand content detection device and method and engineering machinery |
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| JP3249300B2 (en) * | 1994-08-08 | 2002-01-21 | 石油公団 | Underground data transmission equipment |
| JP3744887B2 (en) * | 2002-08-21 | 2006-02-15 | 大同コンクリート工業株式会社 | How to excavate the ground |
| JP4113504B2 (en) * | 2004-01-29 | 2008-07-09 | 大裕株式会社 | Slime processing method and equipment |
| JP2005351121A (en) * | 2004-06-09 | 2005-12-22 | Norihiko Maeda | Stabilizing liquid slime control system using electric specific resistance sensor |
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