JPH0132335B2 - - Google Patents

Info

Publication number
JPH0132335B2
JPH0132335B2 JP58186935A JP18693583A JPH0132335B2 JP H0132335 B2 JPH0132335 B2 JP H0132335B2 JP 58186935 A JP58186935 A JP 58186935A JP 18693583 A JP18693583 A JP 18693583A JP H0132335 B2 JPH0132335 B2 JP H0132335B2
Authority
JP
Japan
Prior art keywords
caisson
water
suspended
joining
steel material
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
Application number
JP58186935A
Other languages
Japanese (ja)
Other versions
JPS6080626A (en
Inventor
Morio Kusano
Kenji Takagi
Hideharu Naito
Seiichi Oohashi
Atsushi Kimura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Penta Ocean Construction Co Ltd
Original Assignee
Penta Ocean Construction Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Penta Ocean Construction Co Ltd filed Critical Penta Ocean Construction Co Ltd
Priority to JP18693583A priority Critical patent/JPS6080626A/en
Publication of JPS6080626A publication Critical patent/JPS6080626A/en
Publication of JPH0132335B2 publication Critical patent/JPH0132335B2/ja
Granted legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D23/00Caissons; Construction or placing of caissons
    • E02D23/02Caissons able to be floated on water and to be lowered into water in situ

Description

【発明の詳細な説明】 本発明は海底にケーソンを積み重ねて構築した
多段積ケーソン堤の構築方法に関するものであ
る。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for constructing a multi-tiered caisson embankment constructed by stacking caissons on the seabed.

従来、ケーソン堤を構築する際の上下のケーソ
ンの接合は、第1図に示すように、先ず下段ケー
ソン1を海底地盤2上に沈設固定し、次に上段ケ
ーソン3に注水しつつ吊りワイヤーをゆるめなが
ら沈降させて、下段ケーソン1上に積み重ね、下
段ケーソン1の上面に設けられている接合突起4
と上段ケーソン3の下面に設けられている接合凹
部5とを嵌め合せる等によつて行つていた。
Conventionally, when constructing a caisson embankment, the upper and lower caissons were connected by first lowering and fixing the lower caisson 1 on the seabed ground 2, and then pouring water into the upper caisson 3 while attaching the suspension wires, as shown in Figure 1. Let it settle while loosening, stack it on the lower caisson 1, and connect the joint protrusion 4 provided on the upper surface of the lower caisson 1.
This was done by fitting the joint recess 5 provided on the lower surface of the upper caisson 3.

しかしながら、このような接合方法では、次の
ような欠点があつた。
However, such a joining method has the following drawbacks.

(イ) 下段ケーソン1を海底地盤2上に据え置くた
め、海底地盤2の不陸を取り除く必要があり、
また海底地盤2はケーソン重量に見合う支持強
度が必要となる欠点がある。
(b) In order to install the lower caisson 1 on the seabed ground 2, it is necessary to remove the unevenness of the seabed ground 2.
Furthermore, the submarine ground 2 has the disadvantage that it requires support strength commensurate with the weight of the caisson.

(ロ) 現地作業が中心となり、波浪等の海象、気象
に左右され易い欠点がある。
(b) The work is mainly done on-site and has the drawback of being easily influenced by sea conditions such as waves and weather.

(ハ) 多段積みケーソン堤では、堤体自重によつて
滑動や転倒に抵抗させるのが一般的であり、堤
体断面は設計荷重の大きさによつて決定される
ので、設計荷重が過大であると上段ケーソン3
でも大断面積のものが必要となり、不経済であ
る。
(c) In multi-tiered caisson embankments, it is common to use the embankment's own weight to resist sliding and overturning, and the cross section of the embankment body is determined by the size of the design load, so if the design load is excessive. Upper caisson 3
However, it requires a large cross-sectional area, which is uneconomical.

本発明の目的は、上下のケーソンの接合を、海
底の地形の影響を受けずに行うことができ、また
気象や海象に影響されない場所を選んで行うこと
ができ、且つ上段ケーソンの断面積の増大を抑制
できる多段積ケーソン堤の構築方法を提供するに
ある。
The object of the present invention is to be able to join the upper and lower caissons without being affected by the topography of the seabed, to select a location that is not affected by weather or sea conditions, and to reduce the cross-sectional area of the upper caissons. An object of the present invention is to provide a method for constructing a multi-tiered caisson embankment that can suppress expansion.

而して上記目的を達成するための本発明の要旨
とする構成は下段ケーソン上に上段ケーソンを積
み重ね、前記下段ケーソンの上版に突設されてい
る接合突起と前記上段ケーソンの底版に設けられ
ている接合凹部とを嵌め合せて接合するケーソン
接合方法において、前記下段ケーソンの上版には
予めその複数箇所にプレストレスト鋼材を吊り下
げておき、且つ前記下段ケーソン内の前記各プレ
ストレスト鋼材の下端には予め支圧ブロツク及び
支圧プレートのほかにグラウト材受型枠をそれぞ
れ支持させておき、前記下段ケーソンを水上に浮
かべ、前記下段ケーソンに浮き手段を取付けた状
態で該下段ケーソンに注水をして該下段ケーソン
を所要の水深まで沈めて前記浮き手段にて水中に
宙吊りの状態に保持させ、前記上段ケーソンに注
水しつつ該上段ケーソンを前記下段ケーソン上に
沈下させ、前記接合突起上に前記接合凹部を嵌め
合せるようにして前記下段ケーソンの排水を行い
浮力を増加させて前記上段ケーソンを前記下段ケ
ーソン上に積み重ね、次に前記上段ケーソンの排
水を行つて該上段ケーソン内の水をほぼ空の状態
にし、前記下段ケーソンの上版に予め吊り下げ支
持されていた前記各プレストレスト鋼材を前記上
段ケーソンの底版に予めあけられていた各貫通孔
を通して前記上段ケーソン内にそれぞれ引き上げ
て緊結作業を行うことを特徴とする多段積ケーソ
ン堤の構築方法にある。
In order to achieve the above object, the present invention has a configuration in which an upper caisson is stacked on a lower caisson, and a joint protrusion protruding from the upper plate of the lower caisson and a connecting protrusion provided on the bottom plate of the upper caisson are provided. In the caisson joining method in which prestressed steel members are suspended in advance at multiple locations on the upper plate of the lower caisson, and at the lower end of each of the prestressed steel members in the lower caisson, In addition to the bearing block and bearing plate, grout receiving molds are supported in advance, the lower caisson is floated on water, and water is poured into the lower caisson with the floating means attached to the lower caisson. The lower caisson is submerged to a required water depth and held suspended in the water by the floating means, and the upper caisson is lowered onto the lower caisson while water is poured into the upper caisson. The lower caisson is drained by fitting the joint recesses to increase buoyancy and the upper caisson is stacked on the lower caisson, and then the upper caisson is drained to substantially empty the water in the upper caisson. The prestressed steel members, which were previously suspended and supported on the upper plate of the lower caisson, are pulled up into the upper caisson through the through holes previously drilled in the bottom plate of the upper caisson, and the tightening work is performed. A method of constructing a multi-tiered caisson embankment is characterized by the following.

次に、本発明に係る多段積ケーソン堤の構築方
法の実施例を図面を参照して詳細に説明する。先
ず、本発明では第2図に示すように下段ケーソン
1の上板1Aに予め複数の貫通孔6を設け、これ
ら貫通孔6を利用して予め上版1Aにプレストレ
スト(以下PCと略記する)鋼材7をそれぞれ吊
り下げ支持させておく。本実施例のPC鋼材7は、
シース管7A内にPC鋼線7Bを収容した構造に
なつている。PC鋼材7の下端には、PC鋼線7B
の下端に圧着された支圧ブロツク8と、PC鋼線
7Bの外周に嵌められた支圧ブロツク8上に支持
された支圧プレート9と、支圧プレート9の下に
丸鋼の如き支持材10を介して支持されたグラウ
ト材受型枠11とがそれぞれ予め設けられてい
る。PC鋼材7の上端には予め仮蓋12が取付け
られていて、この仮蓋12が下段ケーソン1の上
版1Aに係止されることによりPC鋼材7は上版
1Aに吊り下げ支持されている。上版1Aに係止
されている仮蓋12を包囲するようにして上版1
Aの上面にはリング状にガスケツト13が予め取
付けられている。
Next, an embodiment of the method for constructing a multi-tiered caisson embankment according to the present invention will be described in detail with reference to the drawings. First, in the present invention, as shown in FIG. 2, a plurality of through holes 6 are provided in advance in the upper plate 1A of the lower caisson 1, and using these through holes 6, prestressing (hereinafter abbreviated as PC) is applied to the upper plate 1A in advance. The steel materials 7 are each suspended and supported. The PC steel material 7 of this example is
It has a structure in which a PC steel wire 7B is housed within a sheath pipe 7A. At the lower end of the PC steel material 7, the PC steel wire 7B
A bearing block 8 crimped to the lower end, a bearing plate 9 supported on the bearing block 8 fitted around the outer periphery of the PC steel wire 7B, and a supporting material such as a round steel under the bearing plate 9. A grout receiving frame 11 supported via a grout 10 is provided in advance. A temporary cover 12 is attached in advance to the upper end of the PC steel material 7, and by locking this temporary cover 12 to the upper plate 1A of the lower caisson 1, the PC steel material 7 is suspended and supported by the upper plate 1A. . The upper plate 1 is placed so as to surround the temporary lid 12 that is locked to the upper plate 1A.
A ring-shaped gasket 13 is attached in advance to the upper surface of A.

かかる下段ケーソン1を水中に浮べ、その上面
に第3図に示すように、円柱14A及びその上端
に取付けられた浮体14Bからなる浮き手段14
を複数組取付けた状態で、この下段ケーソン1内
に水15を注入しつつ該下段ケーソン1を所要の
水深まで沈めて各浮き手段14の浮力で水中に宙
吊りにし、その状態を保持させる。浮体14B
は、係留索16を介してアンカー17で係留す
る。
The lower caisson 1 is floated in water, and as shown in FIG.
With a plurality of sets attached, the lower caisson 1 is submerged to a required water depth while water 15 is injected into the lower caisson 1, suspended in the water by the buoyancy of each floating means 14, and maintained in that state. Floating body 14B
is moored with an anchor 17 via a mooring rope 16.

次に、クレーン船18のクレーン19の吊りワ
イヤー20で上段ケーソン3を吊り下げ、その中
に水21を注入しつつ下段ケーソン1上に沈下さ
せ、下段ケーソン1の接合突起4上に上段ケーソ
ン3の接合凹部5を嵌め合せるようにして次いで
下段ケーソン1内の排水を行い浮力を増加させて
上段ケーソン3を下段ケーソン1上に積み重ね
る。
Next, the upper caisson 3 is suspended by the hanging wire 20 of the crane 19 of the crane ship 18, and while water 21 is injected into it, it is lowered onto the lower caisson 1, and the upper caisson 3 is placed on the joint projection 4 of the lower caisson 1. Then, the upper caisson 3 is stacked on the lower caisson 1 by fitting the joint recesses 5 of the lower caisson 1 to drain the water inside the lower caisson 1 and increasing the buoyancy.

この状態では、第4図に示すように下段ケーソ
ン1の上版1Aに予めあけられている貫通孔6
と、上段ケーソン3の底版3Aに予めあけられて
いる貫通孔22とが合致され、下段ケーソン1の
上版1Aのガスケツト13が上段ケーソン3の底
版3Aに当接されて貫通孔6,22への海水の浸
入が阻止される。かかる状態で上段ケーソン3内
の排水を行い、該上段ケーソン3内の水21をほ
ぼ空の状態にし、上段ケーソン3内にダイバーが
入り、貫通孔22を閉塞している仮蓋23をあ
け、下段ケーソン1の上版1Aに吊り下げている
PC鋼材7を貫通孔22を通して上段ケーソン3
内に吊り上げる。吊り上げたPC鋼線7Bには張
力を与えて仮緊張させ、第5図に示すように支圧
プレート24を介して定着金具25で一次定着さ
せる。この状態では、PC鋼材7の下端の支圧プ
レート9が下段ケーソン1の上版1Aに当接さ
れ、且つグラウト材受型枠11の上端も下段ケー
ソン1の上版1Aに当接される。総てのPC鋼材
7の一次定着が終了した後各PC鋼線7Bの本緊
張を行い完全に定着させ、各PC鋼線7Bの上端
を所定の位置で切断する。その後、図示しないグ
ラウト材注入孔から貫通孔22内にグラウト26
を注入する。このグラウト26は貫通孔22,6
内に充填されると共に下端のグラウト材受型枠1
1内にも充填される。上端の定着金具25はモル
タル27で覆う。
In this state, as shown in FIG.
and the through hole 22 pre-drilled in the bottom plate 3A of the upper caisson 3 are aligned, and the gasket 13 of the upper plate 1A of the lower caisson 1 is brought into contact with the bottom plate 3A of the upper caisson 3 and passes through the through holes 6, 22. The infiltration of seawater is prevented. In this state, the upper caisson 3 is drained to make the water 21 in the upper caisson 3 almost empty, and a diver enters the upper caisson 3 to open the temporary cover 23 blocking the through hole 22. It is suspended from the upper plate 1A of the lower caisson 1.
Pass the PC steel material 7 through the through hole 22 into the upper caisson 3
Lift it inside. Tension is applied to the lifted PC steel wire 7B to make it temporarily tense, and as shown in FIG. 5, it is temporarily fixed with a fixing fitting 25 via a bearing plate 24. In this state, the bearing pressure plate 9 at the lower end of the PC steel material 7 is brought into contact with the upper version 1A of the lower caisson 1, and the upper end of the grout receiving mold frame 11 is also brought into contact with the upper version 1A of the lower caisson 1. After the primary fixation of all the PC steel materials 7 is completed, main tensioning is performed on each PC steel wire 7B to completely fix it, and the upper end of each PC steel wire 7B is cut at a predetermined position. Thereafter, grout 26 is inserted into the through hole 22 from a grout injection hole (not shown).
inject. This grout 26 has through holes 22, 6
Grout material receiving mold frame 1 filled inside and at the lower end
1 is also filled. The fixing fitting 25 at the upper end is covered with mortar 27.

上下のケーソン1,3の接合作業が終了した
ら、これらケーソン1,3を曳き船で現地へ曳航
して行つて、上下のケーソン1,3内に砂等を詰
めて設置箇所に沈設させる。
After the joining work of the upper and lower caissons 1 and 3 is completed, these caissons 1 and 3 are towed to the site by a towboat, and the upper and lower caissons 1 and 3 are filled with sand and the like and are sunk in the installation location.

特に、下段ケーソン1と上段ケーソン3とをこ
のようにPC鋼材7で接合すると、PC鋼材7の緊
張に伴うレラクゼーシヨンを有効利用することが
できる。即ち、PC鋼材7を緊張する場合、定着
時のゆるみやコンクリートのクリープ等によつて
緊張力が減少する。従つて、予めプレストレスト
の損失を考慮するのが一般的であるが、その量は
設計プレストレストに倍する値となり、PC鋼材
7には必要以上の耐力が要求され不経済である。
一方、本発明の場合上段ケーソン3に波等による
水平力が作用すると、PC鋼材7には緊張に伴う
引張力のほかに、更に水平力による引張力が加わ
る。よつて、PC鋼材7は両引張力に耐え得るも
のを使用しなければならない。このように、二段
等の多段積みのケーソンに用いるPC鋼材7には
水平力による引張力の増分を設定耐力に加味する
必要があり、またレラクゼーシヨンによるプレス
トレストの損失が大きいという欠点がある。これ
を設計上、合理的に満足させるためには、プレス
トレスト損失量と水平力による必要引張耐力をほ
ぼ等しくすればよい。このようにすると、お互の
弱点を補うことができ、レラクゼーシヨンを設計
に有効利用することができ、PC鋼材7の不経済
性を防ぐことができる。
In particular, when the lower caisson 1 and the upper caisson 3 are joined together using the prestressed steel material 7 in this manner, the relaxation caused by the tension of the prestressed steel material 7 can be effectively utilized. That is, when tensioning the PC steel material 7, the tension force decreases due to loosening during fixing, creep of concrete, etc. Therefore, it is common to consider the prestress loss in advance, but the amount is twice the design prestress, and the PC steel material 7 is required to have more proof strength than necessary, which is uneconomical.
On the other hand, in the case of the present invention, when a horizontal force due to waves or the like acts on the upper caisson 3, a tensile force due to the horizontal force is applied to the PC steel material 7 in addition to the tensile force due to tension. Therefore, the PC steel material 7 must be able to withstand both types of tensile forces. As described above, the PC steel material 7 used in multi-tiered caissons such as two-tiered caissons has the disadvantage that it is necessary to take into account the increase in tensile force due to horizontal force in the set yield strength, and that the prestress loss due to relaxation is large. In order to reasonably satisfy this requirement in terms of design, it is sufficient to make the prestress loss amount and the required tensile strength due to horizontal force approximately equal. In this way, each other's weaknesses can be compensated for, relaxation can be effectively utilized in the design, and uneconomical effects of the PC steel material 7 can be prevented.

なお、上記実施例ではケーソンを二段積みした
場合について示したが、本発明は二段以上の多段
積みにも同様に適用することができる。
In the above embodiment, the caissons are stacked in two stages, but the present invention can be similarly applied to multi-stage stacking of two or more stages.

以上説明したように、本発明に係るケーソン接
合方法では、下段ケーソンを水底に着底させない
で浮き手段で水中へ宙吊りにした状態で接合を行
うので、地盤の不陸や支持力不足等は阻害要因と
はならない利点がある。また、このような接合方
法によれば、湾内や入江等のヤード内で作業を行
うこともでき、気象や海象に影響されずに接合作
業を行うことができる。従つて、現地作業が大幅
に短縮されるので、防波堤に適用した場合、相当
沖合に構築することも可能となる。また、本発明
では上下のケーソンをPC鋼材で接合しているの
で、このPC鋼材の引張力が期待でき、転倒に対
する抵抗力の大部分を負担させることができる。
又PC鋼材の緊張力が上段のケーソンの自重に加
味され、従つて上段のケーソンの滑動に対しては
摩擦抵抗力の増加が期待でき、転倒に対しては抵
抗モーメントの増加が見込まれる。その結果、上
段のケーソンの滑動や転倒を上段ケーソンの断面
積の増大で抵抗させる必要がなくなり、上段ケー
ソンを経済的な断面積のもので製作できる利点が
ある。更に本発明によれば、PC鋼材のプレスト
レスト損失量と上段ケーソンに作用する水平力に
よる必要引張耐力をほぼ等しくすることにより、
お互の弱点を補うことができ、PC鋼材のレラク
ゼーシヨンを有効利用でき、PC鋼材の不経済性
を防ぐことができる。かつまた、本発明では、
PC鋼材を予め下段ケーソンの上版に吊り下げ支
持させているので、接合作業時に下段ケーソン内
に作業員が入る必要がなくなり、作業の安全を確
保することができる。また、PC鋼材の下には予
め支圧ブロツク及び支圧プレートのほかにグラウ
ト材受型枠を支持させているので、緊張や定着の
作業を迅速に行うことができる。
As explained above, in the caisson joining method according to the present invention, the lower caisson is joined while suspended in the water by a floating means without touching the bottom of the water. There are advantages that are not factors. Further, according to such a joining method, the work can be performed in a yard such as a bay or an inlet, and the joining work can be performed without being affected by weather or sea conditions. Therefore, the on-site work is greatly shortened, so when applied to a breakwater, it becomes possible to construct it considerably offshore. Furthermore, in the present invention, since the upper and lower caissons are joined by a prestressed steel material, the tensile strength of this prestressed steel material can be expected, making it possible to bear most of the resistance against overturning.
In addition, the tension of the prestressing steel is added to the weight of the upper caisson, and therefore the frictional resistance against sliding of the upper caisson is expected to increase, and the resistance moment against overturning is expected to increase. As a result, there is no need to increase the cross-sectional area of the upper caisson to resist sliding or overturning of the upper caisson, and there is an advantage that the upper caisson can be manufactured with an economical cross-sectional area. Furthermore, according to the present invention, by making the prestress loss amount of the prestressed steel material approximately equal to the required tensile strength due to the horizontal force acting on the upper caisson,
They can compensate for each other's weaknesses, make effective use of the relaxation of prestressed steel, and prevent the uneconomical effects of prestressed steel. Moreover, in the present invention,
Since the prestressing steel material is suspended and supported from the upper part of the lower caisson in advance, there is no need for workers to enter the lower caisson during joining work, ensuring work safety. In addition, in addition to the bearing block and bearing plate, a grout receiving form is supported in advance under the PC steel material, so tensioning and fixing work can be carried out quickly.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は従来の上下ケーソンの接合状態を示す
縦断面図、第2図は本発明で用いる下段ケーソン
の上版に対するPC鋼材の吊下げ状態を示す要部
断面図、第3図は本発明に係るケーソン接合方法
の実施状態の一例を示す説明図、第4図及び第5
図は本発明による上下のケーソンの接合過程を要
す要部断面図である。 1……下段ケーソン、1A……上版、3……上
段ケーソン、4……接合突起、5……接合凹部、
6……貫通孔、7……PC鋼材、7A……シース
管、7B……PC鋼線、8……支圧ブロツク、9
……支圧プレート、10……支持材、11……グ
ラウト材受型枠、12……仮蓋、13……ガスケ
ツト、14A……円柱、14B……浮体、14…
…浮き手段、15……水、16……係留索、17
……アンカー、18……クレーン船、19……ク
レーン、21……水、22……貫通孔、23……
仮蓋、24……支圧プレート、25……定着金
具、26……グラウト、27……モルタル。
Fig. 1 is a vertical sectional view showing the state of joining of the conventional upper and lower caissons, Fig. 2 is a sectional view of essential parts showing the state in which the prestressing steel material is suspended from the upper plate of the lower caisson used in the present invention, and Fig. 3 is the present invention. Explanatory diagrams, FIGS. 4 and 5, showing an example of the implementation state of the caisson joining method according to
The figure is a cross-sectional view of the main part required for the joining process of the upper and lower caissons according to the present invention. 1...Lower caisson, 1A...Upper plate, 3...Upper caisson, 4...Joint protrusion, 5...Join recess,
6...Through hole, 7...PC steel material, 7A...Sheath pipe, 7B...PC steel wire, 8...Bearing block, 9
... Bearing plate, 10 ... Support material, 11 ... Grout material receiving formwork, 12 ... Temporary lid, 13 ... Gasket, 14A ... Cylinder, 14B ... Floating body, 14 ...
...Floating means, 15...Water, 16...Mooring line, 17
... Anchor, 18 ... Crane ship, 19 ... Crane, 21 ... Water, 22 ... Through hole, 23 ...
Temporary lid, 24... bearing plate, 25... anchoring fitting, 26... grout, 27... mortar.

Claims (1)

【特許請求の範囲】[Claims] 1 下段ケーソン上に上段ケーソンを積み重ね、
前記下段ケーソンの上版に突設されている接合突
起と前記上段ケーソンの底版に設けられている接
合凹部とを嵌め合せて接合するケーソン接合方法
において、前記下段ケーソンの上版には予めその
複数箇所にプレストレスト鋼材を吊り下げてお
き、且つ前記下段ケーソン内の前記各プレストレ
スト鋼材の下端には予め支圧ブロツク及び支圧プ
レートのほかにグラウト材受型枠をそれぞれ支持
させておき、前記下段ケーソンを水上に浮べ、前
記下段ケーソンに浮き手段を取付けた状態で該下
段ケーソンに注水をして該下段ケーソンを所要の
水深まで沈めて前記浮き手段にて水中に宙吊りの
状態に保持させ、前記上段ケーソンに注水しつつ
該上段ケーソンを前記下段ケーソン上に沈下さ
せ、前記接合突起上に前記接合凹部を嵌め合せる
ようにして前記下段ケーソンの排水を行い浮力を
増加させて前記上段ケーソンを前記下段ケーソン
上に載置し、次に前記上段ケーソンの排水を行つ
て該上段ケーソン内の水をほぼ空の状態にし、前
記下段ケーソンの上版に予め吊り下げ支持されて
いた前記各プレストレスト鋼材を前記上段ケーソ
ンの底版に予めあけられていた各貫通孔を通して
前記上段ケーソン内にそれぞれ引き上げて緊結作
業を行うことを特徴とする多段積ケーソン堤の構
築方法。
1 Stack the upper caisson on top of the lower caisson,
In the caisson joining method of fitting and joining a joining protrusion protruding on the upper version of the lower caisson and a joining recess provided on the bottom version of the upper caisson, the upper version of the lower caisson is preliminarily provided with a plurality of joint protrusions. A prestressed steel material is suspended at a location, and a grout receiving form is supported in advance at the lower end of each prestressed steel material in the lower caisson in addition to a bearing block and a bearing plate, and the lower caisson is suspended. is floated on water, and with a floating means attached to the lower caisson, water is poured into the lower caisson, the lower caisson is submerged to a required water depth, and suspended in the water by the floating means, and the upper caisson is While pouring water into the caisson, the upper caisson is lowered onto the lower caisson, and the joint recess is fitted onto the joint protrusion to drain water from the lower caisson, increasing buoyancy and lowering the upper caisson to the lower caisson. Then, the upper caisson is drained so that the water in the upper caisson is almost empty, and each of the prestressed steel members, which had been previously suspended and supported on the upper plate of the lower caisson, is placed on the upper caisson. A method for constructing a multi-tiered caisson embankment, characterized in that the caisson is pulled up into the upper caisson through each through-hole previously drilled in the bottom plate of the caisson to carry out the tightening work.
JP18693583A 1983-10-07 1983-10-07 Multi-stage stacked caisson and its construction Granted JPS6080626A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18693583A JPS6080626A (en) 1983-10-07 1983-10-07 Multi-stage stacked caisson and its construction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18693583A JPS6080626A (en) 1983-10-07 1983-10-07 Multi-stage stacked caisson and its construction

Publications (2)

Publication Number Publication Date
JPS6080626A JPS6080626A (en) 1985-05-08
JPH0132335B2 true JPH0132335B2 (en) 1989-06-30

Family

ID=16197290

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18693583A Granted JPS6080626A (en) 1983-10-07 1983-10-07 Multi-stage stacked caisson and its construction

Country Status (1)

Country Link
JP (1) JPS6080626A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006233463A (en) * 2005-02-23 2006-09-07 Oriental Construction Co Ltd Breakwater, repairing/reinforcing structure and construction method of breakwater
CN107201748B (en) * 2017-06-16 2019-07-05 中交一航局第三工程有限公司 Circle caisson encased steel plate construction technology
FR3091882B1 (en) * 2019-01-23 2020-12-25 Daniel Mouton Prefabricated stackable box

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5519316A (en) * 1978-07-24 1980-02-12 Taisei Corp Maritime connection of concrete float body
JPS58138832A (en) * 1982-02-10 1983-08-17 Penta Ocean Constr Co Ltd Caisson levee and construction thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5519316A (en) * 1978-07-24 1980-02-12 Taisei Corp Maritime connection of concrete float body
JPS58138832A (en) * 1982-02-10 1983-08-17 Penta Ocean Constr Co Ltd Caisson levee and construction thereof

Also Published As

Publication number Publication date
JPS6080626A (en) 1985-05-08

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