JP2561588Y2 - Device for applying negative pressure to horizontal drain material - Google Patents
Device for applying negative pressure to horizontal drain materialInfo
- Publication number
- JP2561588Y2 JP2561588Y2 JP1612392U JP1612392U JP2561588Y2 JP 2561588 Y2 JP2561588 Y2 JP 2561588Y2 JP 1612392 U JP1612392 U JP 1612392U JP 1612392 U JP1612392 U JP 1612392U JP 2561588 Y2 JP2561588 Y2 JP 2561588Y2
- Authority
- JP
- Japan
- Prior art keywords
- water collecting
- negative pressure
- drain material
- header
- horizontal drain
- 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 - Lifetime
Links
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本考案は超軟弱地盤を改良するた
めに、該地盤内に多数埋設した水平ドレーン材に負圧を
付加し、強制的に排水させるための水平ドレーン材の負
圧付加装置に関する。BACKGROUND OF THE INVENTION In order to improve ultra-soft ground, the present invention applies a negative pressure to a horizontal drain material buried in the ground and applies a negative pressure to the horizontal drain material for forcible drainage. Related to the device.
【０００２】[0002]
【従来の技術】従来、ヘドロ状の超軟弱地盤を短期間で
圧密させる改良工法として、図２に示すように超軟弱地
盤１中に筒状をした多数のドレーン材２を水平方向に間
隔を隔てて多数埋設し、そのドレーン材２内を減圧して
強制排水する水平ドレーン圧密工法がある。2. Description of the Related Art Conventionally, as an improved construction method for compacting a sludge-like super soft ground in a short period of time, as shown in FIG. There is a horizontal drain consolidation method in which a large number are buried at intervals and the inside of the drain material 2 is decompressed and forcibly drained.
【０００３】ドレーン材２内を減圧する負圧付加装置と
しては、従来、図３に示すように水平ドレーン材２の一
端を閉鎖キャップ３にて閉じ、他端に連結キャップ４を
介して集水ホース５を連結し、この各集水ホース５を一
本の集水パイプ６に連結し、この集水パイプ６内を減圧
ポンプ７にて減圧し、排水させるようにしたものが使用
されている。Conventionally, as a negative pressure applying device for reducing the pressure inside the drain material 2, as shown in FIG. Hose 5 is connected, each water collecting hose 5 is connected to one water collecting pipe 6, and the inside of the water collecting pipe 6 is depressurized by a decompression pump 7 and drained. .
【０００４】[0004]
【考案が解決しようとする課題】このようなドレーン材
圧密工法は、地盤に負圧を作用させて強制的に脱水する
ため、体積の減少効果が大きく、圧密が集行してくる
と、地盤表面に亀裂が生じ、ドレーン材から空気や雨水
等が侵入するようになる。従来の負圧付加装置では、各
ドレーン材が全て一本の集水パイプを通してポンプに連
通させているため、一箇所でもドレーン材が空気を吸い
込み始めると、集水パイプ内の負圧が維持できず、全て
のドレーン材の負圧が保てなくなり、地盤の圧密効果が
低下するという問題があった。[Problem to be Solved by the Invention] In such a drain material consolidation method, since a negative pressure is applied to the ground to forcibly dehydrate it, the effect of reducing the volume is great. A crack is generated on the surface, and air, rainwater, and the like enter from the drain material. In the conventional negative pressure applying device, all drain materials are connected to the pump through one water collecting pipe, so if the drain material starts sucking air even at one point, the negative pressure in the water collecting pipe can be maintained. However, there was a problem that the negative pressure of all drain materials could not be maintained, and the consolidation effect of the ground was reduced.
【０００５】本考案はこのような従来の問題にかんが
み、いずれかのドレーン材が空気を吸い込み始めても、
他のドレーン材に影響を及ぼすことなく地盤改良を維持
できる水平ドレーン材の負圧付加装置の提供を目的とし
たものである。[0005] In view of such a conventional problem, the present invention considers that even if any drain material starts sucking air,
It is an object of the present invention to provide a horizontal drain material negative pressure applying device capable of maintaining ground improvement without affecting other drain materials.
【０００６】[0006]
【課題を達成するための手段】上述の如き従来の問題を
解決し、所期の目的を達成するための本考案の特徴は、
軟弱地盤内に水平方向に埋設した多数の筒状をしたドレ
ーン材の端部を連通した集水パイプと、該集水パイプ内
を減圧する減圧手段とを備えてなる水平ドレーン材の負
圧付加装置において、前記各ドレーン材の端部を複数本
毎にそれぞれ集水ホースを介して一本の集水ヘッダーに
連通させ、その各集水ヘッダーを開閉バルブを介して前
記集水パイプに連通させたことにある。The features of the present invention for solving the conventional problems as described above and achieving the intended purpose are as follows.
Negative pressure application to a horizontal drain material comprising a water collecting pipe communicating with ends of a large number of cylindrical drain materials buried horizontally in soft ground and a pressure reducing means for reducing the pressure in the water collecting pipe In the apparatus, the end of each drain material is communicated to one water collecting header via a water collecting hose for each of a plurality of drain materials, and each water collecting header is connected to the water collecting pipe via an open / close valve. That is.
【０００７】[0007]
【作用】本考案の水平ドレーン材の負圧付加装置は、１
個の集水ヘッダーを単位としてバルブを介して集水パイ
プに連通させているため、いずれかのドレーン材が空気
を吸い込み始めた場合には、そのドレーン材が連結され
ている集水ヘッダーと集水パイプ間のバルブを閉じるこ
とによって、集水パイプ内の減圧状態を正常な値に維持
することができ、他の集水ヘッダーに連通している水平
ドレーン材内の負圧を維持し、地盤改良を継続できる。According to the present invention, the device for applying a negative pressure to a horizontal drain material according to the present invention has the following features.
Each drainage header is connected to the drainage pipe via a valve, so if any drain material starts sucking air, the drainage material is connected to the drainage header to which it is connected. By closing the valve between the water pipes, the decompression state in the water collection pipe can be maintained at a normal value, the negative pressure in the horizontal drain material communicating with other water collection headers is maintained, and the ground The improvement can be continued.
【０００８】[0008]
【実施例】次に本考案の実施例を図面について説明す
る。なお前述した従来例と同じ部分には同一符号を付し
て説明する。この装置では、各ドレーン材２，２……の
複数本を１単位とした多数のグループ１０，１０……に
分け、各グループ１０毎に各ドレーン材２，２……をそ
れぞれ集水ホース５を介して集水ヘッダー１１に連通さ
せる。この各集水ヘッダー１１，１１……は、これに連
通されている全集水ホース５の断面積の和と略同じ断面
の筒体が使用されている。各ヘッダー１１，１１……は
それぞれ連結パイプ１２を介して一本の集水パイプ６に
連通されている。BRIEF DESCRIPTION OF THE DRAWINGS FIG. The same parts as those in the above-described conventional example are denoted by the same reference numerals and described. In this apparatus, a plurality of drain materials 2, 2,... Are divided into a large number of groups 10, 10,... Each having one unit, and each drain material 2, 2,. To the water collecting header 11 via Each of the water collecting headers 11, 11,... Uses a cylindrical body having substantially the same cross-section as the sum of the cross-sectional areas of all the water collecting hoses 5 connected thereto. Each of the headers 11 is connected to one water collecting pipe 6 via a connecting pipe 12.
【０００９】各連結パイプ１２には、それぞれ開閉バル
ブ１３が取り付けられ、内部の流路を開閉できるように
なっている。集水パイプ６は集水ヘッダー１１より大径
のものを使用している。An opening / closing valve 13 is attached to each connecting pipe 12 so as to open / close an internal flow passage. The water collecting pipe 6 has a larger diameter than the water collecting header 11.
【００１０】この装置の使用に際しては、各開閉バルブ
１３を全て開いた状態で集水パイプ６に連通させた減圧
ポンプ７を作動させて排水を開始する。そして圧密が進
行し、地盤１に亀裂が入り、いずれかのドレーン材２が
空気を吸い込み始めたら、そのドレーン材２が連結され
ているヘッダー１１の開閉バルブ１３を閉じ、他のヘッ
ダー１１の減圧状態を維持させつつ、空気吸引箇所の亀
裂を埋める等して目詰りさせ、再度開閉バルブ１３を開
いて圧密を継続させる。また圧密の進行が不均一な場合
には、適宜位置のドレーン材からの吸引を停止させるべ
くいずれかの開閉バルブを閉じて圧密を進行させること
もできる。When using this apparatus, the drainage is started by operating the pressure reducing pump 7 connected to the water collecting pipe 6 with all the open / close valves 13 open. When the consolidation proceeds and the ground 1 is cracked and one of the drain materials 2 starts to suck air, the on-off valve 13 of the header 11 to which the drain material 2 is connected is closed, and the pressure of the other header 11 is reduced. While maintaining the state, clogging is performed by filling a crack in the air suction portion or the like, and the open / close valve 13 is opened again to continue the consolidation. When the progress of the consolidation is not uniform, any one of the open / close valves can be closed to stop the suction from the drain material at an appropriate position, and the consolidation can be advanced.
【００１１】[0011]
【考案の効果】上述したように本考案の装置は、各集水
ヘッダーはそれぞれ独立して集水パイプに連通させるこ
とができるため、ある箇所におけるドレーン材の空気吸
引が激しくなった場合には、その部分が相当する集水ヘ
ッダーの開閉バルブを閉じておき、他のドレーン材によ
る圧密を継続させつつ修復作業が可能になり、圧密効果
を高くすることができる。[Effect of the Invention] As described above, in the device of the present invention, since each water collecting header can be independently connected to the water collecting pipe, when the air suction of the drain material at a certain location becomes severe, Then, the opening / closing valve of the water collecting header corresponding to that part is closed, and the repairing work can be performed while continuing the compaction by other drain materials, so that the compacting effect can be enhanced.
【００１２】また集水ホース、集水ヘッダー、集水パイ
プの順にその断面積を大きくすることにより、エネルギ
ーの損失が小さくなり、圧密作業が経済的に行える。Further, by increasing the cross-sectional area of the water collecting hose, the water collecting header, and the water collecting pipe in this order, the energy loss is reduced, and the compacting operation can be performed economically.
【図１】本考案の一実施例の概略を示す平面図である。FIG. 1 is a plan view schematically showing an embodiment of the present invention.
【図２】従来の水平ドレーン圧密工法を示す断面図であ
る。FIG. 2 is a cross-sectional view showing a conventional horizontal drain consolidation method.
【図３】従来の水平ドレーン材の負圧付加装置の平面図
である。FIG. 3 is a plan view of a conventional apparatus for applying a negative pressure to a horizontal drain material.
１ 軟弱地盤 ２ ドレーン材 ３ 閉鎖キャップ ４ 連結キャップ ５ 集水ホース ６ 集水パイプ ７ 減圧ポンプ １０ グループ １１ 集水ヘッダー １３ 開閉バルブ DESCRIPTION OF SYMBOLS 1 Soft ground 2 Drain material 3 Closure cap 4 Connecting cap 5 Water collecting hose 6 Water collecting pipe 7 Decompression pump 10 Group 11 Water collecting header 13 Opening / closing valve
Claims (2)
筒状をしたドレーン材の端部を連通した集水パイプと、
該集水パイプ内を減圧する減圧手段とを備えてなる水平
ドレーン材の負圧付加装置において、前記各ドレーン材
の端部を複数本毎にそれぞれ集水ホースを介して一本の
集水ヘッダーに連通させ、その各集水ヘッダーを開閉バ
ルブを介して前記集水パイプに連通させたことを特徴と
してなる水平ドレーン材の負圧付加装置。1. A water collecting pipe communicating with ends of a large number of cylindrical drain materials buried horizontally in soft ground,
A negative pressure applying device for a horizontal drain material, comprising a pressure reducing means for reducing the pressure in the water collecting pipe, wherein one end of each of the drain materials is connected to one water collecting header via a water collecting hose. A horizontal drain material negative pressure applying device, wherein each water collecting header is connected to the water collecting pipe via an open / close valve.
ースの断面積より大きくするとともに、集水パイプはこ
れに連通した集水ヘッダーの断面積より大きくしてなる
請求項１に記載の水平ドレーン材の負圧付加装置。2. The water collecting header according to claim 1, wherein the water collecting header has a larger cross-sectional area than the water collecting hose connected thereto, and the water collecting pipe has a larger cross-sectional area than the water collecting header connected thereto. Negative pressure applying device for horizontal drain material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1612392U JP2561588Y2 (en) | 1992-02-18 | 1992-02-18 | Device for applying negative pressure to horizontal drain material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1612392U JP2561588Y2 (en) | 1992-02-18 | 1992-02-18 | Device for applying negative pressure to horizontal drain material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0567626U JPH0567626U (en) | 1993-09-07 |
| JP2561588Y2 true JP2561588Y2 (en) | 1998-01-28 |
Family
ID=11907737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1612392U Expired - Lifetime JP2561588Y2 (en) | 1992-02-18 | 1992-02-18 | Device for applying negative pressure to horizontal drain material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2561588Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5869379B2 (en) * | 2012-03-09 | 2016-02-24 | 五洋建設株式会社 | Vacuum consolidation method |
-
1992
- 1992-02-18 JP JP1612392U patent/JP2561588Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0567626U (en) | 1993-09-07 |
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Legal Events
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| EXPY | Cancellation because of completion of term |