JPH0212606Y2 - - Google Patents
Info
- Publication number
- JPH0212606Y2 JPH0212606Y2 JP1981104761U JP10476181U JPH0212606Y2 JP H0212606 Y2 JPH0212606 Y2 JP H0212606Y2 JP 1981104761 U JP1981104761 U JP 1981104761U JP 10476181 U JP10476181 U JP 10476181U JP H0212606 Y2 JPH0212606 Y2 JP H0212606Y2
- Authority
- JP
- Japan
- Prior art keywords
- caisson
- water
- pump
- pipe
- electrodes
- 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.)
- Expired
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 33
- 239000002699 waste material Substances 0.000 claims description 17
- 238000010276 construction Methods 0.000 claims description 8
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- 239000002689 soil Substances 0.000 claims 1
- 239000004576 sand Substances 0.000 description 9
- 230000032258 transport Effects 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000008400 supply water Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、ケーソン内に設置したポンプにより
釜場内の水および土砂より成るズリをケーソン外
部に搬出するためのニユーマチツクケーソン工法
におけるズリ搬出装置に関する。[Detailed description of the invention] [Field of industrial application] This invention is a method for removing waste in the new caisson construction method, which uses a pump installed inside the caisson to transport waste consisting of water and earth and sand from inside the pot to the outside of the caisson. Regarding equipment.
周知の如く、従来ケーソン内で掘削した土砂は
バケツトでケーソン外に搬送していたが、ケーソ
ン内の気圧を保持するために、２重のゲートを開
閉しなければならず、作業能率が悪いので、掘削
ズリを水と共にスラリー輸送する技術が開発され
た。
As is well known, in the past, earth and sand excavated inside the caisson were transported outside the caisson using buckets, but in order to maintain the air pressure inside the caisson, double gates had to be opened and closed, resulting in poor work efficiency. , a technology was developed to transport excavated slurry together with water.
そのためにケーソン内に釜場を設け、釜場に掘
削ズリを集めて水と共にポンプでケーソン外の地
上に排出するようになつている。 For this purpose, a pot is installed inside the caisson, and the excavated waste is collected in the pot and pumped together with water to be discharged to the ground outside the caisson.
かかるスラリー輸送技術において、ケーソン内
は高圧になつているので、ポンプの吸込ヘツドは
高圧の分だけ高くなり、輸送効率が向上する。し
かしながら、釜場内の水がなくなると、ポンプの
サクシヨンパイプから高圧空気が流入し、ケーソ
ン外部に放出されるので、ケーソン内の気圧が低
下する。そのために、ケーソン内に多くの圧縮空
気を供給しなければならない。 In such a slurry transport technique, since the pressure inside the caisson is high, the suction head of the pump becomes higher by the higher pressure, improving the transport efficiency. However, when the water in the pot runs out, high-pressure air flows in from the suction pipe of the pump and is discharged to the outside of the caisson, causing the pressure inside the caisson to drop. For this purpose, a large amount of compressed air must be supplied into the caisson.
したがつて、本考案の目的は、ズリを輸送する
サクシヨンパイプが空気を吸込んだ場合に、ズリ
の搬出を中断でき、釜場に水が溜つたときにズリ
の搬出を再開できるニユーマチツクケーソン工法
におけるズリ搬出装置を提供するにある。
Therefore, the purpose of the present invention is to provide a new system that can interrupt the removal of waste when air is sucked into the suction pipe that transports the waste, and restart the removal of waste when water accumulates in the pot. The purpose of the present invention is to provide a waste removal device for the caisson construction method.
本考案によれば、ケーソン内に設置したポンプ
により釜場内の水および土砂より成るズリをケー
ソン外部に搬出するためのニユーマチツクケーソ
ン工法におけるズリ搬出装置において、ポンプの
上流側に設けられ釜場内に挿入されたサクシヨン
パイプに電気的に絶縁した絶縁管を設け、その絶
縁管の上流側および下流側のサクシヨンパイプに
それぞれ電極を設け、それらの電極は導電率計に
結線されており、かつポンプの下流側に設けられ
ケーソン外に延びるデリベリバルブに自動的に開
閉できるバルブを設けてある。
According to the present invention, in the waste removal device in the new caisson construction method, which uses a pump installed in the caisson to transport waste consisting of water and earth and sand in the kettle to the outside of the caisson, the waste removal device is installed on the upstream side of the pump and inside the kettle. An electrically insulated insulated tube is provided in the suction pipe inserted into the insulated tube, and electrodes are provided in the suction pipe on the upstream and downstream sides of the insulated tube, and these electrodes are connected to a conductivity meter. In addition, a delivery valve provided downstream of the pump and extending outside the caisson is provided with a valve that can be automatically opened and closed.
したがつて、釜場内に水が存在している場合
は、ポンプはサクシヨンパイプを介してスラリー
を吸上げて、デリベリパイプを介してケーソン外
部の地上に排出するが、釜場内の水がなくなると
サクシヨンパイプの入口からケーソン内の空気が
流出してしまう。すると絶縁管の上流側および下
流側には水が存在しなくなるので、水が存在した
場合に比べて両電極間の抵抗が大となる。この絶
縁管の上流側と下流側との抵抗値の差異は導電率
計で検出され、水がなくなつた場合はデリベリパ
イプのバルブを閉じてケーソン内の空気の流出を
阻止する。
Therefore, if there is water in the kettle, the pump sucks up the slurry through the suction pipe and discharges it to the ground outside the caisson through the delivery pipe, but when the water in the kettle runs out, Air inside the caisson flows out from the suction pipe entrance. Then, since water no longer exists on the upstream and downstream sides of the insulating tube, the resistance between the two electrodes becomes greater than if water were present. The difference in resistance between the upstream and downstream sides of this insulated pipe is detected by a conductivity meter, and when the water runs out, the delivery pipe valve is closed to prevent air from flowing out of the caisson.
以下図面を参照して本考案の実施例を説明す
る。
Embodiments of the present invention will be described below with reference to the drawings.
第１図はニユーマチツクケーソン工法における
ズリ搬出システムを示し、ケーソンＡ内は従来の
態様で高圧に保持されている。ケーソンＡ内には
全体を１で示すジエツトポンプが設置されてお
り、そのノズルから高圧水を噴出することにより
釜場Ｂからサンシヨンパイプ２により水と共に土
砂を吸い上げ地盤を掘削する。ジエツトポンプ１
に駆動水を供給するための駆動水ライン３が設け
られており、沈砂池Ｃにフイードポンプ４を設置
し、そのフイードポンプ４によりフイードタンク
５に水を汲み上げ、次いでフイードタンク５から
駆動ポンプ６により駆動水ライン３を経てジエツ
トポンプ１に駆動水を供給する。フイードタンク
５には水位計７が、駆動ポンプ６の吐出口にはチ
エツクバルブ８、ゲートバルブ９が、またジエツ
トポンプ１の入口にはチエツクバルブ１０、ゲー
トバルブ１１が設けられている。また、ジエツト
ポンプ１により吸い上げられた土砂はデリベリラ
イン１２により沈砂池Ｃに排出される。デリベリ
ライン１２には自動バルブ１３，１６、手動バル
ブ１４，１５および流量計１７が設けられてい
る。さらに、釜場Ｂにサークル状のジエツトノズ
ル１８から高圧ジエツトを噴出してジエツト掘削
を行うと共に、釜場Ｂへ水を補給する補給水ライ
ン１９が設けられており、沈砂池Ｃに設けた補給
水ポンプ２０により高圧水を供給する。補給水ラ
イン１９にはチエツクバルブ２１，２３，２５、
手動バルブ２２，２４，２６が設けられている。 Fig. 1 shows a waste removal system in the New Machic caisson construction method, in which the inside of the caisson A is maintained at high pressure in the conventional manner. A jet pump, generally indicated by 1, is installed in the caisson A, and by spouting high-pressure water from its nozzle, water and earth are sucked up from the cauldron B through the sanction pipe 2, and the ground is excavated. Jet pump 1
A drive water line 3 is provided for supplying drive water to the sand basin C, a feed pump 4 is installed in the settling basin C, the feed pump 4 pumps water to a feed tank 5, and then the drive water line 3 is pumped from the feed tank 5 by a drive pump 6. Driving water is supplied to the jet pump 1 through 3. A water level gauge 7 is provided in the feed tank 5, a check valve 8 and a gate valve 9 are provided at the discharge port of the driving pump 6, and a check valve 10 and a gate valve 11 are provided at the inlet of the jet pump 1. Further, the earth and sand sucked up by the jet pump 1 is discharged to the settling basin C through the delivery line 12. The delivery line 12 is provided with automatic valves 13 and 16, manual valves 14 and 15, and a flow meter 17. Furthermore, a high-pressure jet is ejected from a circular jet nozzle 18 to perform jet excavation in the potter B, and a make-up water line 19 is provided to supply water to the potter B, and a make-up water line 19 is provided to supply water to the potter B. A pump 20 supplies high pressure water. The make-up water line 19 has check valves 21, 23, 25,
Manual valves 22, 24, 26 are provided.
かかるズリ搬出システムにおいて、釜場Ｂの水
位が下がりサクシヨンマウスからエアが逃出する
事態となることが起こる。そこで、このような事
態が起こつた場合には、デリベリライン１２に設
けた自動バルブ１３を閉じズリの搬出を中止す
る。このためサクシヨンパイプ２にエアの検出装
置を設ける。 In such a waste removal system, a situation occurs where the water level in the pot B falls and air escapes from the suction mouth. Therefore, when such a situation occurs, the automatic valve 13 provided in the delivery line 12 is closed to stop carrying out the waste. For this purpose, an air detection device is provided in the suction pipe 2.
第２図に本考案に実施されるエア検出装置の一
例を示し、鉄管よりなるサクシヨンパイプ２の一
部に絶縁管、例えばゴム製短管２ａを介装させ、
ゴム製短管２ａをへだてて鉄管部分に一対の電極
２８ａ，２８ｂを取付け、その電極２８ａ，２８
ｂを導電率計２９に結線する。 FIG. 2 shows an example of an air detection device implemented in the present invention, in which an insulating tube, for example, a short rubber tube 2a is interposed in a part of a suction pipe 2 made of an iron tube.
A pair of electrodes 28a, 28b are attached to the iron pipe part by separating the short rubber pipe 2a, and the electrodes 28a, 28
b is connected to the conductivity meter 29.
サクシヨンマウスが水封されている状態におい
ては、管路中は水に満たされているので、電極２
８ａと２８ｂ間の抵抗は小さい。釜場Ｂの水位が
下がり、空気を吸い込み管路中が空気に満たされ
ると電極２８ａと２８ｂ間の抵抗が大きくなる。
この抵抗値の違いを導電率計２９で検出し、設定
時間を越えてある設定値以上になつた場合には第
１図に示すコンプレツサ２７を作動させて自動バ
ルブ１３を閉じる。これにより空気の逃出が防止
される。釜場Ｂの水位が上がり正常状態になれば
電極２８ａ，２８ｂでそれを検出し、再び自動バ
ルブ１３を開いて運転を再開する。 When the suction mouse is sealed with water, the tube is filled with water, so the electrode 2
The resistance between 8a and 28b is small. When the water level in the pot B falls and air is sucked in and the pipe is filled with air, the resistance between the electrodes 28a and 28b increases.
This difference in resistance value is detected by a conductivity meter 29, and if the resistance exceeds a certain set value over a set time, the compressor 27 shown in FIG. 1 is operated to close the automatic valve 13. This prevents air from escaping. When the water level in the pot B rises and becomes normal, the electrodes 28a and 28b detect this, and the automatic valve 13 is opened again to restart operation.
なお、サクシヨンパイプとして合成樹脂製パイ
プ等の絶縁パイプを使用する場合は、ゴム製短管
等の絶縁短管を使用することなく一対の電極を流
れの方向に適宜の間隔をへだて、かつ管路内を流
れる輸送物に接するようにして設ければよい。 In addition, when using an insulated pipe such as a synthetic resin pipe as a suction pipe, do not use an insulated short pipe such as a rubber short pipe, but separate the pair of electrodes at an appropriate distance in the flow direction, and What is necessary is just to provide it so that it is in contact with the transported goods flowing in the road.
以上の如く、本考案によれば、ケーソン内の土
砂を水と共にポンプでスラリー輸送するので、土
砂の排出効率がよく、かつ釜場内の水がなくなつ
ても、バルブを閉じることによりケーソン内の高
圧空気がデリベリーパイプから流出しないので、
ケーソン内の圧縮空気の補給量が少なくてすむ。
それ故にニユーマチツクケーソン工法におけるズ
リの搬出装置として効能率で運転できる。
As described above, according to the present invention, the slurry of the earth and sand in the caisson is transported together with water by a pump, so that the earth and sand is discharged efficiently.Even if the water in the pot is exhausted, the valve can be closed to keep the earth and sand in the caisson clean. Since high pressure air does not flow out from the delivery pipe,
The amount of compressed air needed to be supplied inside the caisson is small.
Therefore, it can be operated efficiently as a waste removal device in the new caisson construction method.
第１図は本考案を実施したニユーマチツクケー
ソン工法におけるズリ搬出装置の説明図、第２図
は本考案を実施したエア検知装置を取付けたサク
シヨンパイプの縦断面図である。
Ａ……ケーソン、Ｂ……釜場、Ｃ……沈砂池、
１……ジエツトポンプ、２……サクシヨンパイ
プ、２ａ……ゴム製短管、３……駆動水ライン、
１２……デリベリライン、１３……自動バルブ、
１９……補給水ライン、２７……コンプレツサ、
２８ａ，２８ｂ……電極、２９……導電率計。
FIG. 1 is an explanatory diagram of a sludge removal device in the new caisson construction method embodying the present invention, and FIG. 2 is a longitudinal sectional view of a suction pipe to which an air detection device embodying the present invention is attached. A...Caisson, B...Kamaba, C...Sand basin,
1... Jet pump, 2... Suction pipe, 2a... Rubber short pipe, 3... Driving water line,
12...Delivery line, 13...Automatic valve,
19...Supplementary water line, 27...Compressusa,
28a, 28b...electrode, 29...conductivity meter.
Claims (1)
および土砂より成るズリをケーソン外部に搬出す
るためのニユーマチツクケーソン工法におけるズ
リ搬出装置において、ポンプの上流側に設けられ
釜場内に挿入されたサクシヨンパイプに電気的に
絶縁した絶縁管を設け、その絶縁管の上流側およ
び下流側のサクシヨンパイプにそれぞれ電極を設
け、それらの電極は導電率計に結線されており、
かつポンプの下流側に設けられケーソン外に延び
るデリベリバルブに自動的に開閉できるバルブを
設けたことを特徴とするニユーマチツクケーソン
工法におけるズリ搬出装置。 In the waste removal device used in the new caisson construction method, a suction system installed on the upstream side of the pump and inserted into the pot pit is used to transport waste consisting of water and soil from the pot pit to the outside of the caisson using a pump installed inside the caisson. An electrically insulated insulated pipe is provided in the pipe, and electrodes are provided in the suction pipes on the upstream and downstream sides of the insulated pipe, and these electrodes are connected to a conductivity meter.
A waste removal device for the pneumatic caisson construction method, characterized in that a delivery valve provided on the downstream side of the pump and extending outside the caisson is provided with a valve that can be automatically opened and closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10476181U JPS5812852U (en) | 1981-07-16 | 1981-07-16 | Sludge removal device for pneumatic caisson construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10476181U JPS5812852U (en) | 1981-07-16 | 1981-07-16 | Sludge removal device for pneumatic caisson construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5812852U JPS5812852U (en) | 1983-01-27 |
| JPH0212606Y2 true JPH0212606Y2 (en) | 1990-04-09 |
Family
ID=29899335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10476181U Granted JPS5812852U (en) | 1981-07-16 | 1981-07-16 | Sludge removal device for pneumatic caisson construction method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5812852U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5097396A (en) * | 1973-12-25 | 1975-08-02 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02683Y2 (en) * | 1977-03-24 | 1990-01-09 |
-
1981
- 1981-07-16 JP JP10476181U patent/JPS5812852U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5097396A (en) * | 1973-12-25 | 1975-08-02 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5812852U (en) | 1983-01-27 |
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