JPS5938427A - Setting of cylindrical structure - Google Patents
Setting of cylindrical structureInfo
- Publication number
- JPS5938427A JPS5938427A JP14796582A JP14796582A JPS5938427A JP S5938427 A JPS5938427 A JP S5938427A JP 14796582 A JP14796582 A JP 14796582A JP 14796582 A JP14796582 A JP 14796582A JP S5938427 A JPS5938427 A JP S5938427A
- Authority
- JP
- Japan
- Prior art keywords
- cell
- cylindrical structure
- trench
- nozzle
- water
- 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.)
- Pending
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D23/00—Caissons; Construction or placing of caissons
- E02D23/16—Jointing caissons to the foundation soil, specially to uneven foundation soil
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Earth Drilling (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は、筒状構造物の設置方法、さらに詳しくは、
たとえば港湾や人口島の護岸建設などに使用される鋼管
セルなどの、筒状構造物を水底に設置づ−る方法に関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for installing a cylindrical structure, more specifically,
The present invention relates to a method for installing cylindrical structures, such as steel pipe cells, used in the construction of seawalls for ports and artificial islands on the bottom of the water.
上記のような鋼管セルを海底に設置する場合、一般に、
設置地域の海底を予め良好な地盤に改良、整地したのち
その上に鋼管セルを設置する圓しルＴ法が採用されるこ
とが多い。ところが、Ｍ管セルの設置工事が沖合化する
とともに人形化してきたこと、および地盤改良工事によ
る海洋汚染が問題になることなどの理由で、近年は、鋼
管セルをバイブロハンマにより打設してその下端部を海
底に埋込む根太式鋼管セル工法が採用されつつある。こ
の工法は、１期、精度、海洋汚染などの面装置セル工法
より利点があるとされでいるが、その反面、人形鋼管セ
ルでは人出ノｊの打設機が多数必要であり、設置箇所の
水底の土質に応じた打設力の制御が必要であるなど高度
な施工技術が要求される。When installing a steel pipe cell like the one above on the seabed, generally,
The Round T method is often adopted, in which the seabed in the installation area is improved and leveled to a good ground before the steel pipe cells are installed on top of it. However, due to the fact that the installation work of M-pipe cells has become increasingly offshore as well as the problem of marine pollution caused by ground improvement work, in recent years steel pipe cells have been driven using a vibrohammer and their lower ends have been removed. The joist-type steel pipe cell construction method, in which the section is buried in the seabed, is being adopted. This construction method is said to have advantages over the surface equipment cell construction method, such as first-stage construction, accuracy, and marine pollution. However, on the other hand, doll steel pipe cells require a large number of unmanned pouring machines, and the installation location is limited. Advanced construction techniques are required, such as the need to control the pouring force according to the soil quality of the water bottom.
この発明の目的は、上記の問題を解消した合理的な筒状
構造物の設置方法を提供することにある。An object of the present invention is to provide a rational method for installing a cylindrical structure that solves the above problems.
この発明による筒状構造物の設置方法は、下端が開口し
た筒状構造物を水底に設置するに際し、筒状構造物の下
端部全周に複数の下向きのノズルを取イ１けておき、こ
れらのノズルから水底に向【ノて高圧ジエン１〜水を噴
ＤＡ覆ることにより筒状構造物の下端縁の真下の水底に
環状溝を掘り、筒状構造物の下端部をこの溝の中に嵌め
ることを特徴とするものである。The method for installing a cylindrical structure according to the present invention is that when installing a cylindrical structure with an open bottom end on the bottom of the water, a plurality of downward nozzles are set aside around the entire circumference of the bottom end of the cylindrical structure. By spraying high-pressure diene 1 to water from these nozzles toward the bottom of the water, an annular groove is dug in the bottom of the water just below the lower edge of the cylindrical structure, and the lower end of the cylindrical structure is inserted into this groove. It is characterized by being able to fit into.
筒状構造物の横断面形状は任意であり、この明細書にお
ける筒状構造物には、横断面が円形のもの、多角形のも
の、円形以外の曲線図形のものなどが全て含まれる。ま
た、筒状構造物の材質も任意であり、たとえば鋼、コン
クリートなどが挙げられる。The cross-sectional shape of the cylindrical structure is arbitrary, and the cylindrical structure in this specification includes all those having a circular cross-section, a polygonal cross-section, a curved shape other than a circular cross-section, and the like. Further, the material of the cylindrical structure is also arbitrary, and examples thereof include steel and concrete.
この発明によれば、ノズルから噴射される高圧ジェット
水によつそ掘られた環状溝の中に筒状構造物の下端部を
自重で嵌めるので、従来の根太式鋼管セル工法のように
打設機を必要としない。まｌ〔、高圧ジェット水にＪ：
って環状溝を掘るものであるから、設置箇所の水底の地
盤の土質（硬度など）によらず、また土質に不均衡があ
っても、容易に環状溝を掘って筒状構造物を設置するこ
とができる。さらに、打設機を使用しないので騒音がな
く、筒状構造物の下端縁の真下に環状溝を掘るだｔｅｌ
であるから、従来装置セル工法と比較して水の汚濁がき
わめて少ない。According to this invention, the lower end of the cylindrical structure is fitted under its own weight into the annular groove dug by the high-pressure jet water sprayed from the nozzle, so it is not necessary to use the conventional joist type steel pipe cell construction method. No equipment required. [, J to high pressure jet water:
Since the method involves digging a circular trench, it is easy to dig a circular trench and install a tubular structure regardless of the soil quality (hardness, etc.) of the ground at the bottom of the water at the installation location, or even if there is an imbalance in the soil quality. can do. Furthermore, since no pouring machine is used, there is no noise, and the annular groove can be dug directly under the lower edge of the cylindrical structure.
Therefore, compared to conventional equipment cell construction methods, water pollution is extremely low.
以下図面を参照してこの発明の詳細な説明する。The present invention will be described in detail below with reference to the drawings.
図面は下端が開［１した鋼管セル（筒状構造物）（１）
を海底（水底）（２）に設置する場合を示しでおり、ま
ず設置作業に先立ち、セル（１）の下端部全周に次のよ
うにしで複数の下向きのノズル（３）を取イ」けておく
。づなわち、セル（１）の外面に、複数の垂直なジェッ
ト水給水管（４）を管取付金具（５）によって固定する
とともに、これらの管（４）の下端にそれぞれ接続した
複数の水平円弧状の分岐管（６）を管取イ１金具（５）
によって固定する。そして、分岐管（６）には予め複数
の下向きのノズル（３）を設けておく。このジェット水
給水管（４）および分岐管（６）の取付けは、セル（１
）の製作時に行なう。分岐管（６）は、ノズル（３）が
セル（１）の下端縁の真下を向くように取付けられる。The drawing shows a steel pipe cell (cylindrical structure) (1) with the lower end open [1]
This figure shows the case where the cell is installed on the seabed (underwater) (2).First, before installation work, install multiple downward nozzles (3) around the entire lower end of the cell (1) as follows. Keep it. That is, a plurality of vertical jet water supply pipes (4) are fixed to the outer surface of the cell (1) with pipe fittings (5), and a plurality of horizontal Attach the arc-shaped branch pipe (6) to the tube handle A1 metal fitting (5)
Fixed by A plurality of downward nozzles (3) are provided in advance in the branch pipe (6). The jet water supply pipe (4) and branch pipe (6) are installed in the cell (1).
) during production. The branch pipe (6) is installed so that the nozzle (3) faces directly below the lower edge of the cell (1).
また、給水管（４）および分岐管（６）の数、ならびに
ノズル（３）の数、位置などは、セル（１）の直径、設
置箇所の海底の土質などを考慮しで決定される。Further, the number of water supply pipes (4) and branch pipes (6), as well as the number and position of nozzles (3) are determined by taking into account the diameter of the cell (1), the soil quality of the seabed at the installation location, etc.
一方、作業船（図示略）に、高圧海水ポンプ（７）およ
びその吐出管から分岐した複数のジェット水給水管（８
）を設【ノ、６管（８）には弁（９）を設けておく。Meanwhile, a high-pressure seawater pump (7) and a plurality of jet water supply pipes (8
) is installed and a valve (9) is installed in the 6th pipe (8).
そして、作業船の大形クレーン（図示略）でセル（１）
を吊下げ、作業船の各給水管（８）の先端とセル（１）
の各給水管（４）の先端とをゴム管（１０）で接続する
。次に、クレーンによりセル（１）を海底（２）付近ま
で吊下ろし、ヒル（１）の下端が海底（２）に接地する
直前に作業船のポンプ（７）により管（８） （１０
）（４）（６）を通してノズル（３）から海底（２）に
向けて高圧ジェット水を噴射し、その雨撃力を利用して
セル（１）の下端縁の真下に環状溝（１１）を掘る。そ
して、この溝（１１）がある程度の深さになったならば
、その分だけクレーンの吊索を繰出すことにより、セル
（１）を下降さけてその下端部を溝（１１）の中に嵌め
る。以下、同様にノズル（３）から高圧ジェット水を噴
射しながらセル（１）を徐々に下降させることにより、
環状溝（１１）を掘進めるとともに、セル（１）の下端
部をさらにこの溝（１１）の中に嵌めていく。そして、
溝（１１）が所定の深さに達し１Ｃならば、ヒル（１）
を溝（１１）の底に吊下ろして接地させ、設置作業を完
了する。Then, the cell (1) was installed using a large crane (not shown) on the work boat.
and the tip of each water supply pipe (8) of the work boat and the cell (1).
The ends of each water supply pipe (4) are connected with a rubber pipe (10). Next, the cell (1) is lowered to near the seabed (2) by a crane, and just before the lower end of the hill (1) touches the seabed (2), the pump (7) of the work boat is used to lower the cell (8) (10
) (4) Through (6), high-pressure jet water is injected from the nozzle (3) toward the seabed (2), and the rain impact force is used to create an annular groove (11) just below the lower edge of the cell (1). dig. When this groove (11) reaches a certain depth, the cell (1) is lowered and its lower end is inserted into the groove (11) by letting out the hanging rope of the crane by that amount. Fit it. Thereafter, by gradually lowering the cell (1) while injecting high-pressure jet water from the nozzle (3),
While digging the annular groove (11), the lower end of the cell (1) is further fitted into this groove (11). and,
If the groove (11) reaches a predetermined depth and is 1C, the hill (1)
is suspended from the bottom of the groove (11) and grounded to complete the installation work.
設置箇所の海底（２）の地盤に硬度の不均衡があるよう
な場合、環状溝（１１）の軟土質側の部分と硬土質側の
部分に掘進量の差が生じ、セル（１）の下端が硬土質側
の溝・（１１）の底に先に接地してセル（１）が軟土質
側に傾くことがある。このため、セル（１）の頂部中央
に傾斜計（図示略）を設けておき、これによりセル（１
）が傾いたことづなわち環状溝（１１）の掘進量に差が
生じたことを検知したときに、作業船の給水管（８）の
弁（９）を適当に操作して、掘進量が同一になるまで軟
土質側への給水を停止する。If there is an imbalance in the hardness of the ground on the seabed (2) at the installation location, there will be a difference in the amount of excavation between the soft soil side and the hard soil side of the annular groove (11), causing the cell (1) to The lower end may touch the bottom of the groove (11) on the hard soil side first, causing the cell (1) to tilt toward the soft soil side. For this purpose, an inclinometer (not shown) is provided at the center of the top of the cell (1).
) is tilted, that is, when it is detected that there is a difference in the amount of excavation of the annular groove (11), the valve (9) of the water supply pipe (8) of the work boat is appropriately operated to adjust the amount of excavation. Stop water supply to the soft soil side until the soil becomes the same.
セル（１）の設置作業が完了するど、ヒル（１）の給水
管（４）からゴム管（１０）を取外して回収し、この給
水管（４）、分岐管（６）およ、びノズル（３）をセル
（１）に固定したまま放置する。Once the cell (1) installation work is completed, remove and collect the rubber pipe (10) from the water supply pipe (4) of the hill (1), and remove the water supply pipe (4), branch pipe (6), and Leave the nozzle (3) fixed in the cell (1).
上記実施例では、セル（１）の外面だ番ノにノズル（３
）が取イ」けられているが、ノズルは、セルの内面だけ
に取付けられてもよいし、セルの外面と内面の両方に取
付けられてもよい。セルの設置作業完了後、上記実施例
では給水管（４）、分岐管（６）およびノズル（３）を
セル（１）に固定したまま放置しているが、これらの全
部または一部を適宜な手段によりセルから取外して回収
するようにしてもよい。In the above embodiment, a nozzle (3) is installed on the outer surface of the cell (1).
), the nozzle may be attached only to the inner surface of the cell, or may be attached to both the outer and inner surfaces of the cell. After completing the cell installation work, in the above example, the water supply pipe (4), branch pipe (6), and nozzle (3) are left fixed to the cell (1), but all or part of these can be removed as appropriate. It may be removed from the cell and recovered by any suitable means.
図面はこの発明の実施例を示し、第１図は鋼管セルの上
部を示づ斜視図、第２図はｕＡ管セル下端部のノズルの
部分を拡大して示Ｊ側面図、第３図はノズルに高圧ジエ
ツｌ〜水を供給するための管系銃口である。
（１）・・・鋼管セル（筒状ｍ漬物）、（２）・・・海
底（水底）、（３）・・・ノズル、（１１）・・・環状
溝。The drawings show an embodiment of the present invention; FIG. 1 is a perspective view showing the upper part of the steel pipe cell, FIG. 2 is an enlarged side view of the nozzle at the lower end of the uA pipe cell, and FIG. This is a pipe muzzle for supplying high-pressure jet water to the nozzle. (1) Steel pipe cell (cylindrical m pickle), (2) Seabed (bottom of the water), (3) Nozzle, (11) Annular groove.
Claims (1)
′るに際し、筒状構造物（１）の上端部全周に複数の下
向きのノズル（３）を取付けておき、これらのノズル（
３）から水底（２）に向けて高圧ジェット水を噴射する
ことにより筒状構造物（１）の下端縁の真下の水底（２
）に環状溝（１１）を掘り、筒状構造物（１）の下端部
をこの溝（１１）の中に嵌めることを特徴とする筒状構
造物の設置方法。When installing a cylindrical structure (1) with an open bottom end on the water bottom (2), a plurality of downward nozzles (3) are attached to the entire circumference of the top end of the cylindrical structure (1). nozzle (
3) toward the water bottom (2), the water bottom (2) is directly below the lower edge of the cylindrical structure (1).
), and the lower end of the cylindrical structure (1) is fitted into the groove (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14796582A JPS5938427A (en) | 1982-08-25 | 1982-08-25 | Setting of cylindrical structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14796582A JPS5938427A (en) | 1982-08-25 | 1982-08-25 | Setting of cylindrical structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5938427A true JPS5938427A (en) | 1984-03-02 |
Family
ID=15442091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14796582A Pending JPS5938427A (en) | 1982-08-25 | 1982-08-25 | Setting of cylindrical structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5938427A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100387790C (en) * | 2005-08-05 | 2008-05-14 | 卢如年 | Ground caisson construction technology and ground caisson |
| WO2014203858A1 (en) * | 2013-06-19 | 2014-12-24 | 新日鐵住金株式会社 | Steel-pipe pile and steel-pipe pile construction method |
| JP2018178471A (en) * | 2017-04-10 | 2018-11-15 | 清水建設株式会社 | Caisson and method for settling caisson |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4933410A (en) * | 1972-07-28 | 1974-03-27 |
-
1982
- 1982-08-25 JP JP14796582A patent/JPS5938427A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4933410A (en) * | 1972-07-28 | 1974-03-27 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100387790C (en) * | 2005-08-05 | 2008-05-14 | 卢如年 | Ground caisson construction technology and ground caisson |
| WO2014203858A1 (en) * | 2013-06-19 | 2014-12-24 | 新日鐵住金株式会社 | Steel-pipe pile and steel-pipe pile construction method |
| AU2014282262B2 (en) * | 2013-06-19 | 2016-09-22 | Chowa Kogyo Co., Ltd. | Steel-pipe pile and steel-pipe pile construction method |
| JPWO2014203858A1 (en) * | 2013-06-19 | 2017-02-23 | 新日鐵住金株式会社 | Steel pipe pile and steel pipe pile construction method |
| JP2018178471A (en) * | 2017-04-10 | 2018-11-15 | 清水建設株式会社 | Caisson and method for settling caisson |
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