JPS6085119A - Underwater concrete placing device - Google Patents
Underwater concrete placing deviceInfo
- Publication number
- JPS6085119A JPS6085119A JP19168583A JP19168583A JPS6085119A JP S6085119 A JPS6085119 A JP S6085119A JP 19168583 A JP19168583 A JP 19168583A JP 19168583 A JP19168583 A JP 19168583A JP S6085119 A JPS6085119 A JP S6085119A
- Authority
- JP
- Japan
- Prior art keywords
- concrete
- cylindrical member
- cylindrical
- tremie
- tremie tube
- 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.)
- Granted
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/06—Placing concrete under water
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Underground Or Underwater Handling Of Building Materials (AREA)
Abstract
Description
【発明の詳細な説明】 本発明は水中コンクリート打設装置に関する。[Detailed description of the invention] The present invention relates to underwater concrete placement equipment.
水中にコンクリ−１・を打設する工法の代表的なものと
して、トレミー管を用いる工法がある。こ４は、に端に
漏斗を有し、下端が開口した口径が３０ｃｍ程度のトレ
ミー管と呼称される鋼管によってコンクリートを水中の
被打設場所へ導き、コンクリートを打設する一Ｆ法であ
る。A typical method for pouring concrete underwater is a method using tremie pipes. This 4 is a 1F method in which concrete is poured into the concrete by guiding it to the place to be poured underwater using a steel pipe called a tremie pipe with a diameter of about 30 cm and having a funnel at the end and an open bottom end. .
前記■：法によりコンクリートを打設するに当り、コン
クリートをトレミー管へ投入するのみではトレミー管の
内部に侵入している水によってコンクリ−Ｉ・が分離し
てしまい、コンクリ−１・はその川をなさないことがら
、コンクリートの投入に先だってトレミー領内にコンク
リートと水との接触を断つべくスポンジメはプランジャ
を入れて栓をし、この」二にコンクリートを投入するよ
うにしている。そして、コンクリートの投入祉が多くな
るにつれてスポンジ又はプランジャはトレミー管内を１
・降し、これがトレミー管の下端から外れたとき、コン
クリートはトレミー管から所定の被打設場所へ向けて打
設される。■: When placing concrete according to the law, if the concrete is only poured into the tremie pipe, the water that has entered the tremie pipe will separate the concrete In order to prevent this from happening, before pouring the concrete, Spongeme put a plunger and plugged it in order to cut off the contact between the concrete and water in the tremie area, and poured the concrete into this hole. Then, as the amount of concrete being poured increases, the sponge or plunger moves the inside of the tremie pipe 1
・When the concrete is removed from the lower end of the tremie pipe, concrete is poured from the tremie pipe toward the specified pouring location.
被打設場所の水深が浅い場合には、前記操作により、コ
ンクリートの乱れのない打設を確保できる。しかし、被
打設場所の水深が深くなって、スポンジやプランジャに
加わるコンクリートの重量がスポンジやプランジャに作
用する浮力及び摩擦力を大幅に−Ｌ回ると、コンクリー
トはトレミー管の下端の開口から噴流となって噴出する
ようになり、コンクリートの劣化が著しくなる。そこで
、トレミー儀をフレシキブルな内管と多数の孔を有する
外管との２重管として形成し、内管を水圧によって絞ら
せて摩擦力を高めるなどの対策がとられている（特開昭
５１−１４０３０７号公報）。これによれば、コンクリ
ート速度をある程度制御できるが、施工状態に即応した
コンクリート速度の制御は難しい。If the water depth at the place where concrete is to be poured is shallow, the above operation can ensure undisturbed concrete pouring. However, when the water depth at the place to be poured becomes deeper and the weight of the concrete applied to the sponge and plunger significantly exceeds the buoyancy and frictional force acting on the sponge and plunger by -L, the concrete is jetted out from the opening at the lower end of the tremie pipe. The concrete begins to erupt and the concrete deteriorates significantly. Therefore, countermeasures have been taken, such as forming the tremie as a double tube with a flexible inner tube and an outer tube with many holes, and increasing the frictional force by squeezing the inner tube with water pressure. 51-140307). According to this method, the concrete speed can be controlled to some extent, but it is difficult to control the concrete speed in response to the construction conditions.
次に、前記コンクリートの噴出の問題とは直接関係はな
いか、トレミー管から被打設場所へ向けてコンクリート
を打ち始めるときコンクリートの打ち始めには、先打ち
の未硬化コンクリートの保護がないため、コンクリート
か水と急激に接触し、その七メント分の拡散や流出、骨
材の分離なとの発生は避けられず、コンクリートの品質
は著しく劣化する。Next, it may not be directly related to the above-mentioned problem of concrete gushing, since when concrete is poured from the tremie pipe toward the place to be poured, there is no protection for the previously poured uncured concrete. When concrete suddenly comes into contact with water, the diffusion and outflow of the water and the separation of aggregates are unavoidable, and the quality of concrete deteriorates significantly.
従って、本発明の１Ｊ的はコンクリートの落下速度を調
節できるコンクリート打設装置を得ることにある。Therefore, an object of the present invention is to provide a concrete pouring device that can adjust the falling speed of concrete.
本発明の別の目的はコンクリートの打ち始めにノ１．す
るコンクリートの品質の劣化を可及的に防止できるコン
クリート打設装置を得ることにある。Another object of the present invention is to perform No. 1 at the beginning of pouring concrete. To provide a concrete pouring device which can prevent deterioration of the quality of concrete as much as possible.
本発明はトレミー管と、該トレミー管に軸線の周りを回
転可能に接続された円筒部材であって内側に軸線方向へ
伸びるらせん羽根を有する円筒部材と、該円筒部材を回
転させる手段とを含む水中コンクリート打設装置を提供
する。The present invention includes a tremie tube, a cylindrical member rotatably connected to the tremie tube around an axis, the cylindrical member having spiral blades extending inwardly in the axial direction, and means for rotating the cylindrical member. Provides underwater concrete placement equipment.
本発明は、また、トレミー管と、該トレミー管に軸線の
周りを回転可能に接続された円筒部材であって内側に軸
線方向へ伸びるらせん羽根を有する円筒部材と、該円筒
部材を回転させる手段と、前記円筒部材の下方に配置さ
れた開閉装置と、該開閉装置を作動させる手段とを含む
水中コンクリート打設装置を提供する。The present invention also provides a tremie tube, a cylindrical member rotatably connected to the tremie tube around an axis, the cylindrical member having a spiral blade extending inwardly in the axial direction, and means for rotating the cylindrical member. There is provided an underwater concrete placing apparatus including: a switching device disposed below the cylindrical member; and means for operating the switching device.
本発明は、また、トレミー管と、該トレミー管に軸線の
周りを回転可能に接続された円筒部材であって内側に軸
線方向へ伸びるらせん羽根を有する円筒部材と、該円筒
部材を回転させる手段と、前記円筒部材の径方向の外方
にヒ下方向へ移動可能に配置された接続部材と、該接続
部材を移動させる手段と、前記接続部材に−に端で枢着
された複数のリブ部材を円周方向へ間隔をおいて有する
開閉装置と、該開閉装置を作動させるべく前記接続部材
に設けられた手段とを含む水中コンクリート打設装置を
提供する。The present invention also provides a tremie tube, a cylindrical member rotatably connected to the tremie tube around an axis, the cylindrical member having a spiral blade extending inwardly in the axial direction, and means for rotating the cylindrical member. a connecting member disposed radially outwardly of the cylindrical member so as to be movable in the downward direction; means for moving the connecting member; and a plurality of ribs pivotally connected to the connecting member at the negative end. An underwater concrete placing device is provided which includes a switchgear having circumferentially spaced members and means provided on the connecting member for actuating the switchgear.
以下側こ、図面を参照して本発明の実施例について説明
する。Below, embodiments of the present invention will be described with reference to the drawings.
本発明に係るコンクリ−１・打設装置ｉｏは第１図に示
すように、トレミー管１２と、円筒部材１４と、この円
筒部材１４を回転させる手段１６とを含む。As shown in FIG. 1, the concrete 1/casting apparatus io according to the present invention includes a tremie pipe 12, a cylindrical member 14, and means 16 for rotating the cylindrical member 14.
Ｉ・レミー？１↑１２はその１一方の端部に漏斗（図示
せず）をイー１する鋼管からなり、その下方の端部に１
’ｌ？、’１部材１４が後述するように回転可能に接続
される。Ｉ・レミー管１２はコンクリートを打設すべき
場所の深さに応じて適当な長さに形成される。I. Remy? 1↑12 consists of a steel pipe with a funnel (not shown) attached to one end, and a funnel (not shown) attached to its lower end.
'l? , '1 member 14 are rotatably connected as described below. The I-Remy pipe 12 is formed to have an appropriate length depending on the depth of the place where concrete is to be poured.
このトレミー １１’ ｌ ２には環状の枠１８が固着
されている。枠１８は後述する開閉装置を昇降するため
の油圧ジャ、キ２０を支持する。An annular frame 18 is fixed to this tremie 11'l2. The frame 18 supports a hydraulic jack 20 for raising and lowering an opening/closing device, which will be described later.
円筒部材１４はトレミー管１２と実質的に同し１１径の
鋼管からなり、その内側に軸線方向へ伸びるらせん羽根
２２を有し、いわゆるめねしコンベヤを構成している。The cylindrical member 14 is made of a steel tube having substantially the same diameter as the tremie tube 12 and has a spiral blade 22 extending in the axial direction, and constitutes a so-called female conveyor.
円筒部材１４の上方の端部に第２図に詳細に示すように
、環状の支持部材２４が溶接され、この支持部材２４の
一１ニ方に複数のパ、１・２６を介して円筒形の歯車２
８が取り付けられている。他力、トレミー管１２の下方
の端部に断面かコの字形をした懸架部材３０が全周にわ
たって溶接されており、ｈ持部材２４が懸架部材３０の
Ｆ方の水平片３１Ｊ−にスラストベアリング３２を介し
て載せられている。この結果、円筒部材１４はトレミー
管１２に接続され、懸架部材の水平片３１の内周面によ
り径方向への振れ止めがされ、軸線の周りを回転可能で
ある。As shown in detail in FIG. 2, an annular support member 24 is welded to the upper end of the cylindrical member 14, and a cylindrical support member 24 is welded to one side of the support member 24 through a plurality of holes 1 and 26. gear 2
8 is attached. A suspension member 30 having a U-shaped cross section is welded to the lower end of the tremie tube 12 over the entire circumference, and a thrust bearing member 24 is attached to a horizontal piece 31J on the F side of the suspension member 30. It is loaded via 32. As a result, the cylindrical member 14 is connected to the tremie tube 12, is rested in the radial direction by the inner peripheral surface of the horizontal piece 31 of the suspension member, and is rotatable around the axis.
トレミー省・１２と円筒部材１４とのそれぞれの対向す
る端面の間にシールパツキン３４が、また懸架部材３０
の水平片３１の内周面と円筒部材１４の外周面との間に
シールパツキン３６がそれぞれ配置され、懸架部材３０
で囲まれた空間３８を気密に保っている。A seal gasket 34 is provided between the opposing end surfaces of the tremie saver 12 and the cylindrical member 14, and the suspension member 30
Seal packings 36 are arranged between the inner circumferential surface of the horizontal piece 31 and the outer circumferential surface of the cylindrical member 14.
The space 38 surrounded by is kept airtight.
第３図に示す例では、円筒部材１４の内径はトレミー管
１２の外径より大に形成されており、トレミー管１２の
下方の端部が円筒部材１４の一１ニ方の端部に挿入され
〜ている。そして、円筒部材１４とトレミー管１２との
間、懸架部材３０の水平片３１と円筒部材１４との間に
それぞれジャーナルへアリング１５とシールパンキン１
７とが介在されている。円筒部材１４に固着された支持
部材２４はスラストベアリング３２上に支持されている
。第２図および第３図の例において、トレミーｔｉ”、
１２と円筒部材１４との接触部、円筒部材１４と懸、
架部材３０との接触部にはポリテトラフルオロエチレン
のような低摩擦のプラスチック３３を貼り伺けることか
好ましい。In the example shown in FIG. 3, the inner diameter of the cylindrical member 14 is larger than the outer diameter of the tremie tube 12, and the lower end of the tremie tube 12 is inserted into one end of the cylindrical member 14. It is being done. A journal ring 15 and a seal pankin 1 are provided between the cylindrical member 14 and the tremie tube 12 and between the horizontal piece 31 of the suspension member 30 and the cylindrical member 14, respectively.
7 is interposed. A support member 24 fixed to the cylindrical member 14 is supported on a thrust bearing 32. In the examples of FIGS. 2 and 3, tremie ti",
12 and the cylindrical member 14, the cylindrical member 14 and the suspension,
It is preferable that a low-friction plastic 33 such as polytetrafluoroethylene be applied to the contact portion with the frame member 30.
回転手段１６は円筒部材１４を回転させる。図ボの例で
は、回転手段１６は懸架部材３０の上方の水モ片３９に
固定された油圧モータ４０と、この油圧モータ４０に接
続されたビニオン４２と、ピニオン４２に１１み合う歯
車２８とからなる。油圧モータ４０は配管４４を経て−
Ｌ方の作業船（図示せず）のポンプに連なり、油圧の供
給を受ける。この油圧モータ４０は回転速度が可変であ
る。配管４４が懸架部材３０へ進入する部位にはシール
パンキン４６が配置され、気密を保っている。The rotating means 16 rotates the cylindrical member 14. In the example shown in the figure, the rotating means 16 includes a hydraulic motor 40 fixed to the water slide 39 above the suspension member 30, a pinion 42 connected to the hydraulic motor 40, and a gear 28 meshing with the pinion 42 11 times. Consisting of The hydraulic motor 40 is connected via piping 44 to -
It is connected to the pump of the L side work boat (not shown) and receives hydraulic pressure. The rotation speed of this hydraulic motor 40 is variable. A seal pankin 46 is disposed at a portion where the pipe 44 enters the suspension member 30 to maintain airtightness.
開閉装置５０は円筒部材１４の下方の端部の回りに配置
されている。図示の例では、開閉装置５０は第４図に示
すように、鋼製の４つのリブ部材５２と可撓性ある高張
力繊維のシート５４とを備える。各リブ部材５２は二等
辺三角形に形成されており、他方、シート５４は環状に
形成されている。複数のリブ部材５２は、円周方向へ等
間隔をおいてしかもその短辺５３が径方向の内方となり
、該短辺５３がシート５４の中心を中心とする仮想円の
１１ｉ線となるように配置され、第４図でシート５４が
リブ部材５２の下側となるように、シート５４はボルト
とナツトとの締付け、接着その他によりリブ部材５２に
取り付けられる。The opening/closing device 50 is arranged around the lower end of the cylindrical member 14 . In the illustrated example, the opening/closing device 50 includes four rib members 52 made of steel and a sheet 54 of flexible high-tensile fiber, as shown in FIG. Each rib member 52 is formed into an isosceles triangle shape, while the sheet 54 is formed into an annular shape. The plurality of rib members 52 are spaced at equal intervals in the circumferential direction, and their short sides 53 are radially inward, such that the short sides 53 form line 11i of an imaginary circle centered on the center of the seat 54. The sheet 54 is attached to the rib member 52 by tightening bolts and nuts, gluing, or the like so that the sheet 54 is located below the rib member 52 in FIG.
リブ部材５２は第１図および第４図に示すように、その
短辺５３で、接続部材５６から下方へ向けて突出された
取付板５８にそれ自体公知のヒンジ６０を介して接続さ
れ、このヒンジ６ｏを支点として開閉Ｏｆ能である。こ
の結果、リブ部材５２とシート５４とは接続部材５６と
相まってかさ状体６２を構成している。As shown in FIGS. 1 and 4, the rib member 52 is connected at its short side 53 to a mounting plate 58 projecting downward from the connecting member 56 via a known hinge 60. It can be opened and closed using the hinge 6o as a fulcrum. As a result, the rib member 52 and the sheet 54 together with the connecting member 56 constitute an umbrella-shaped body 62.
開閉装置５０を作動させる手段である油圧ジヤツキ６４
が接＃７ｉ！部材５６に枢着されており、この油圧ジヤ
ツキ６４のロットの端部がリブ部材５２に枢着されてい
る。油圧ジヤツキ６４は可撓性の配管６６を経て作業船
のポンプに連なり、油圧の供給を受け、伸縮する。この
結果、かさ状体６２は第１図の実線で示すつぼんだ状態
からリブ部材５２が垂直となる半開きの状態、更にリブ
部材５２がほぼ水平となる全開の状態まで開閉可能であ
る。A hydraulic jack 64 that is a means for operating the opening/closing device 50
But contact #7i! The rod end of the hydraulic jack 64 is pivotally connected to the rib member 52 . The hydraulic jack 64 is connected to a pump of the work boat via a flexible pipe 66, and expands and contracts when supplied with hydraulic pressure. As a result, the umbrella body 62 can be opened and closed from a collapsed state shown by the solid line in FIG. 1 to a half-open state in which the rib members 52 are vertical, and further to a fully open state in which the rib members 52 are substantially horizontal.
接続部材５６は環状の部材からなる。この接続部材５６
は円筒部材１４に沿って−Ｌ下方向へ移動可能に差込ま
れており、円筒部材１４は接続部材５６に対して相対回
転可能である。他方、前記枠１８に支持された４つの油
圧ジャ、キ２０のロット２１が懸架部材３０を液密状態
で貫通し、接続部材５６まで伸び、この接続部材５６に
連結されている。油圧ジヤツキ２０は配管６８を経て作
業船のポンプに連なり、油圧の供給を受け、伸縮する。The connecting member 56 is made of an annular member. This connecting member 56
is inserted so as to be movable downward -L along the cylindrical member 14, and the cylindrical member 14 is rotatable relative to the connecting member 56. On the other hand, the four hydraulic jacks 20 supported by the frame 18 pass through the suspension member 30 in a liquid-tight manner, extend to the connecting member 56, and are connected to the connecting member 56. The hydraulic jack 20 is connected to the pump of the work boat via a pipe 68, and expands and contracts when supplied with hydraulic pressure.
この結果、接続部材５６はかさ状体６２が半開きまたは
全開のとき１円筒部材１４の外方を−に下に移動できる
。As a result, the connecting member 56 can move downwardly outside the cylindrical member 14 when the umbrella body 62 is half-open or fully open.
第５図に示す開閉装Ｍ７０は補助部材７２と、ゴムのよ
うな円筒状の弾性体７４と、複数の屈伸可能な部材７６
とを備える。この開閉装置７０は後述する構成から明ら
かなごこく、速やかな開閉を可能とする。The opening/closing device M70 shown in FIG.
Equipped with. This opening/closing device 70 is sturdy and enables quick opening/closing as will be apparent from the configuration described below.
補助部材７２は軸線方向へ間隔をおいて配置される２つ
の内側部材７８と、２つの外側部材８゜とからなる。内
側部材７Ｂは円筒状であり、円筒部材１４の外径よりわ
ずかに大きな内径を有する。上方の内側部材７８に環状
の被懸架部材８２が固着されている。この内側部材７８
に円筒部材１４の下方の端部を差込み、他方、トレミー
管の懸架部材３０（第１図）に固着される複数の支持ロ
ッド８４を被懸架部材８２に固着し、内側部材７８は円
筒部材１４に沿って移動不可に支持され、円筒部材１４
は内側部材７８に対して相対回転可能である。円筒部材
１４にシール８６を取り付け、このシールにより内側部
材７８の上方の端部を取り囲むことが好ましい。The auxiliary member 72 consists of two inner members 78 and two outer members 8° spaced apart in the axial direction. The inner member 7B is cylindrical and has an inner diameter slightly larger than the outer diameter of the cylindrical member 14. An annular suspended member 82 is fixed to the upper inner member 78 . This inner member 78
The lower end of the cylindrical member 14 is inserted into the cylindrical member 14 , a plurality of support rods 84 fixed to the tremie tube suspension member 30 (FIG. 1) are fixed to the suspended member 82 , and the inner member 78 is attached to the cylindrical member 14 . The cylindrical member 14 is immovably supported along the
is rotatable relative to the inner member 78. Preferably, a seal 86 is attached to the cylindrical member 14 and surrounds the upper end of the inner member 78.
２つの内側部材７８は対向する端部に、径方向の外方へ
張り出された肉厚の取付部８８を備える。この取付部８
８は開口端に向けて先細状となった傾斜面９０とこの傾
斜面９０を囲む筒部９１とを有する。筒部９１に固定リ
ング９２が圧入され、弾性体７４の端部は傾斜面９０と
固定リング９２とに挾持されている。他方、２つの外側
部材８０は一方の端部に、径方向の内方へ張り出された
肉厚の支持部９４と他方の対向する端部に設けられたフ
ランジ９５とを有し、各支持部９４を内側部材７８の取
付部８８の軸線方向の外方に係合させ、両フランジ９５
を貫通するポルト９６にナツト９８をねじ込んで、両性
側部材８０は結合されている。The two inner members 78 are provided at opposing ends with thick mounting portions 88 that extend radially outward. This mounting part 8
8 has an inclined surface 90 tapered toward the open end and a cylindrical portion 91 surrounding this inclined surface 90. A fixing ring 92 is press-fitted into the cylindrical portion 91, and the end of the elastic body 74 is held between the inclined surface 90 and the fixing ring 92. On the other hand, the two outer members 80 have a thick support portion 94 extending radially inward at one end and a flange 95 provided at the other opposing end. portion 94 is engaged with the mounting portion 88 of the inner member 78 axially outwardly, and both flanges 95
Both side members 80 are connected by screwing a nut 98 into a port 96 passing through the two sides.
屈伸可能な部材７６は複数段けられ、円周方向へ間隔を
おいて配置される。この部材７６は第６図に示すように
、はぼ三角形をした２つのリンク体１００，１０２を備
える。リンク体１００は、ピストンロッド１０４のアイ
１０５に回転可能に連結されており、他方、リンク体１
０２はそのアイ１０３を介してリンク体１００に回転可
能に連結されている。リンク体１００とリンク体１０２
とをピストンロッド１０４で懸架したときの自由長さＬ
ｌは、２つの内側部材７８の対向する取付部８８がなす
間隔Ｌ２より若干大きく形成される。そして、この一対
のリンク体を備える屈伸部材７６を間隔内に配置し、下
方のリンク体１０２を下方の取付部８８に当接し、ピス
トンロッド１０４を１方の取付部８８から上方向へ突出
させると、両リンク体は再取付部に拘束される結果、第
５図に示すように、アイ１０３を径方向の内方へわずか
に突出した状態に保持される。The bendable and extensible members 76 are arranged in multiple stages at intervals in the circumferential direction. As shown in FIG. 6, this member 76 includes two link bodies 100 and 102 each having a substantially triangular shape. Link body 100 is rotatably connected to eye 105 of piston rod 104, while link body 1
02 is rotatably connected to the link body 100 via its eye 103. Link body 100 and link body 102
The free length L when suspended by the piston rod 104
1 is formed to be slightly larger than the distance L2 between the opposing mounting portions 88 of the two inner members 78. Then, the bending member 76 including the pair of link bodies is arranged within a gap, the lower link body 102 is brought into contact with the lower attachment part 88, and the piston rod 104 is made to protrude upward from one attachment part 88. As a result, both link bodies are restrained by the reattachment portion, and as a result, the eye 103 is held in a state slightly protruding inward in the radial direction, as shown in FIG.
ピストンロッド１０４は開閉装置７ｏを作動する手段で
ある油圧ジヤツキ１０６のシリンダに導かれる。この油
圧・ジヤツキ１０６は外側部材８゜の支持部９４に円周
方向へ間隔をおいて設けられた四部１ ’０７に配置さ
れ、油圧ジヤツキ１０６に接続された配管１０８は作業
船のポンプに連なり、油圧の供給を受ける。ポンプ１．
０６に油圧が供給されると、ピストンロッド１０４が伸
長し、ｈ；件部材７６が径方向の内方へ向けて曲がり、
弾性体７４を仮想線に示すように、内方へ絞り込む、そ
してピストンロッド１０４が縮小すると、弾性体７４は
その弾性で元の状態に戻ることとなる。The piston rod 104 is guided to the cylinder of a hydraulic jack 106, which is a means for operating the opening/closing device 7o. This hydraulic jack 106 is arranged in four parts 1'07 provided at intervals in the circumferential direction on the support part 94 of the outer member 8 degrees, and the pipe 108 connected to the hydraulic jack 106 is connected to the pump of the work boat. , receives hydraulic power supply. Pump 1.
When hydraulic pressure is supplied to 06, the piston rod 104 extends, and the member 76 bends radially inward,
When the elastic body 74 is squeezed inward as shown by the imaginary line and the piston rod 104 is contracted, the elastic body 74 returns to its original state with its elasticity.
第１図に示すコンクリ−１・打設装置１０の作用を第７
図を参照して説明する。まず、トレミー管１２の全長を
水深に応して適当に継ぎ足しして長くし、又は継ぎ足し
部分を除いて短くシ、コンクリート打設装置１ｏを水中
のコンクリート被打設場所へ配置δする。開閉装置５ｏ
を閉じ、コンベヤ１１０からトレミー管１２および円筒
部材１４ヘコンクリ−１・を投入し、コンクリートを充
填する（ａ）。円筒部材１４の回転速度を調節してコン
クリ−Ｉ・の打設速度を適当に選定し、開閉装置５０を
徐々に開いてコンクリートと水との急激な接触を防ぐと
共にコンクリートの流動速度を抑えながら、静かにコン
クリートを打ち始める（ｂ）。開閉装置５ｏを徐々に広
げながら、コンクリ−１・の打設速度に合せて開閉装置
５ｏを油圧ジヤツキ２ｏにより上昇させ、円筒部材１４
の先端を先打ちコンクリ−）１１２中に埋め込ませる（
’ｃ）。これによってセメント成分の流出、拡散を抑１
トする。コンクリートの打設が進み、円筒部材１４の先
端が先打ちコンクリートｌｌＺ中に完全に埋め込まれる
と、開閉装置５０は−に方へ引き上げられ、半開きに保
持される（ｄ）。この状態で所定量のコンクリートの打
設が行なわれる。所定量のコンクリートの打設が完了し
た後、コンクリ−１・打設装置ｌＯを引ＳＬげ（ｅの仮
想線）、開閉装置５０を閉し、次の被打設場所へコンク
リート打設装置ｌＯを移動する（ｅ）。再び同じ操作を
繰り返すことにより、既設のコンクリートに続けてコン
クリ−１−１１４を打設する（ｆ）。このようにして、
広い面積にわたって水中コンクリートの施工が可能とな
る。The operation of the concrete 1 and pouring device 10 shown in FIG.
This will be explained with reference to the figures. First, the entire length of the tremie pipe 12 is lengthened by appropriately adding parts according to the water depth, or it is shortened except for the added parts, and the concrete pouring device 1o is placed at a place where concrete is to be poured underwater. Opening/closing device 5o
is closed, and the concrete 1 is introduced from the conveyor 110 into the tremie pipe 12 and the cylindrical member 14 to fill it with concrete (a). The rotational speed of the cylindrical member 14 is adjusted to appropriately select the casting speed of concrete I, and the opening/closing device 50 is gradually opened to prevent rapid contact between concrete and water while suppressing the flow speed of concrete. , quietly begin pouring concrete (b). While gradually expanding the opening/closing device 5o, the opening/closing device 5o is raised by the hydraulic jack 2o in accordance with the casting speed of the concrete 1, and the cylindrical member 14 is raised.
Embed the tip in pre-cast concrete) 112 (
'c). This suppresses the outflow and diffusion of cement components.
to When the concrete placement progresses and the tip of the cylindrical member 14 is completely embedded in the pre-cast concrete llZ, the opening/closing device 50 is pulled up in the - direction and held half open (d). In this state, a predetermined amount of concrete is poured. After pouring a predetermined amount of concrete, pull the concrete 1 and pouring device lO to SL (imaginary line e), close the opening/closing device 50, and move the concrete pouring device lO to the next place to be poured. Move (e). By repeating the same operation again, concrete 1-114 is poured following the existing concrete (f). In this way,
It becomes possible to construct underwater concrete over a wide area.
本発明に係るコンクリート打設装置はトレミー管と円筒
部材とこの円筒部材を回転させる手段とで基本的に構成
される。この基本構成の装置によれば、円筒部材の回転
速度を変えることにより、コンクリートの配合を変える
ことができ、また波動性の異なるコンクリートを使用す
る場合においても、その作業性に合せて打設速度を自由
に変えることができることから、品質の良いコンクリー
トの施工ができる。また、トレミー管内でコンクリート
を再練りできることから、材料の分離を抑え、この点か
らも品質の良いコンクリ−１・の施−Ｌができる。The concrete placing apparatus according to the present invention basically comprises a tremie pipe, a cylindrical member, and means for rotating the cylindrical member. According to the device with this basic configuration, the mix of concrete can be changed by changing the rotation speed of the cylindrical member, and even when concrete with different wave properties is used, the casting speed can be adjusted to suit the workability. Since it is possible to freely change the concrete, it is possible to construct high-quality concrete. Furthermore, since the concrete can be remixed within the tremie pipe, separation of materials is suppressed, and from this point of view as well, high-quality concrete can be applied.
・般にトレミー管を用いる水中コンクリートの打設の際
には、打ち始めから打ち終りまで連続してコンクリート
を打ち込むことが原則であるが、打ち込み途中でトレミ
ー管が先打ちのコンクリートから抜き出ることがある。・Generally, when placing underwater concrete using tremie pipes, the general rule is to pour concrete continuously from the start to the end of pouring, but the tremie tubes may be pulled out of the pre-cast concrete during pouring. There is.
この場合、トレミー管内への水の入れ替わりにより、コ
ンクリートは水に洗われて分離し、不良コンクリートを
形成することとなる。従来では、このような事態が起こ
れば、打ち込みを中断せざるを得なかった。しかし、本
発明では、円筒部材によりコンクリートを圧入している
ことから、水の流入はほとんど起こらず、仮に水が流入
しても、わずかな徽の水であれば、円筒部材で再練りが
可能であるため、材料の分離を抑止できる。In this case, due to the exchange of water into the tremie pipe, the concrete is washed by water and separated, forming defective concrete. In the past, if such a situation occurred, typing would have to be interrupted. However, in the present invention, since the concrete is press-fitted using a cylindrical member, almost no water inflow occurs, and even if water does enter, if it is only a small amount of water, it can be remixed using the cylindrical member. Therefore, separation of materials can be suppressed.
次に、前記基本構成に加えて開閉装置を備える場合、適
当に選定された円筒部材の回転速度と開閉装置の絞り作
用とが相まってコンクリートを静かに、ゆっくりと吐出
できることから、水と急激に接触することによるセメン
ト成分の流出を抑ＩＦできる。また、開閉装置により、
コンクリートの流動速度を抑えることができることから
、コンクリートが流動するときの水の巻き込みを防ぎ、
コンクリートの乱れを抑止できる。Next, when an opening/closing device is provided in addition to the above basic configuration, the rotational speed of an appropriately selected cylindrical member and the throttling action of the opening/closing device combine to enable concrete to be discharged quietly and slowly, resulting in rapid contact with water. By doing so, it is possible to suppress the outflow of cement components. In addition, the opening/closing device
Since it is possible to suppress the flow speed of concrete, it prevents water from being entrained when concrete flows,
Concrete disturbance can be suppressed.
更に、開閉装置を上下に移動させる手段を備える場合、
開閉装置によりコンクリートの流動速度を小さくしてコ
ンクリートの拡散を抑え、コンクリートの打設に合せて
開閉装置を徐々に引き上げることができることから、円
筒部材を先打ちコンクリート中に挿入させ易く、一度、
円筒部材を先打ちコンクリート中に挿入した後は、コン
クリートと水との接触を断った状態で水中コンクリート
を打設できるので、コンクリートの劣化はほとんど生じ
ない。Furthermore, when provided with means for moving the opening/closing device up and down,
The opening/closing device reduces the flow rate of concrete to suppress the spread of concrete, and the opening/closing device can be gradually raised as concrete is poured, making it easier to insert the cylindrical member into pre-cast concrete.
After the cylindrical member is inserted into the pre-cast concrete, underwater concrete can be placed with the concrete cut off from contact with water, so there is almost no deterioration of the concrete.
第１図は本発明に係るコンクリート打設装置の一部を断
面とした正面図、第２図はトレミー管と円筒部材どの接
続部の拡大断面図、第３図は接続部の別の例を示す拡大
断面図、第４図は開閉装置の拡大平面図で、開いた状態
を示し、第５図は開閉装置の別の例を示す断面図、第６
図は折り曲がり部材の正面図、第７図ａ−ｆはコンクリ
ート打設装置によってコンクリートを打設する状態を示
す説明図である。
１０：コンクリート打設装置、
１２、トレミー管、１４：円筒部材、
１６；回転一手段、 ２０；油圧ジャ、ンキ、２２：ら
せん羽根、 ５０．７０；開閉装置、５２：リプ部材、
５４；シート、
５６；接続部材、 ７２：補助部材、
７４ 、 ｑｄ性体、 ７６；屈伸部材。
代理人 弁理士 松 水 宣 行
第２図
第３１／１
第４図
第５図
８４寸
に／Fig. 1 is a partially sectional front view of the concrete placing device according to the present invention, Fig. 2 is an enlarged sectional view of the connection between the tremie pipe and the cylindrical member, and Fig. 3 is another example of the connection. FIG. 4 is an enlarged plan view of the switchgear in an open state, FIG. 5 is a cross-sectional view showing another example of the switchgear, and FIG.
The figure is a front view of the folding member, and FIGS. 7a to 7f are explanatory diagrams showing a state in which concrete is poured by a concrete placement device. 10: Concrete placement device, 12, Tremie pipe, 14: Cylindrical member, 16; One rotation means, 20; Hydraulic jack, 22: Spiral blade, 50.70; Opening/closing device, 52: Lip member,
54; Sheet; 56; Connection member; 72; Auxiliary member; 74; QD body; 76; Bending member. Agent Patent Attorney Nobuyuki Matsumizu Figure 2 Figure 31/1 Figure 4 Figure 5 84 cm /
Claims (6)
可能に接続された円筒部材であって内側に軸線方向へ伸
びるらせん羽根を有する円筒部材と、該円筒部材を回転
させる手段とを含む、水中コンクリート打設装置。(1) Includes a tremie tube, a cylindrical member rotatably connected to the tremie tube around an axis and having a spiral blade extending inwardly in the axial direction, and means for rotating the cylindrical member. , underwater concrete placement equipment.
可能に接続された円筒部材であって内側に軸線方向へ伸
びるらせん羽根を有する円筒部材と、該円筒部材を回転
させる手段と、前記円筒部材の下方に配置された開閉装
置と、該開閉装置を作動させる手段とを含む、水中コン
クリート打設装置。(2) a tremie tube, a cylindrical member rotatably connected to the tremie tube around an axis and having a spiral blade extending inwardly in the axial direction, and means for rotating the cylindrical member; An underwater concrete placing device comprising: a switchgear disposed below a cylindrical member; and means for operating the switchgear.
配置された複数のリブ部材であってその上端を支点とし
て開閉可能なリブ部材と、該リブ部材に取り付けられた
可撓性のシートとを備える。特許請求の範囲第（２）項
に記載の水中コンクリート打設装置。(3) The opening/closing device described in +iii is a plurality of rib members arranged at intervals in the circumferential direction, and the rib member can be opened and closed using its upper end as a fulcrum, and a flexible sheet attached to the rib member. Equipped with. An underwater concrete placing device according to claim (2).
の補助部材と、該補助部材に上下の端部を固定された筒
状の弾性体と、該弾性体の外側で円゛渕方向に間隔をお
いて配置された複数の屈伸可能な部材と、該部材を屈曲
させる手段とを備える。 ４￥許請求の範囲第（２）項に記載の水中コンクリート
打設装置。(4) The opening/closing device includes a cylindrical auxiliary member attached to the cylindrical member, a cylindrical elastic body whose upper and lower ends are fixed to the auxiliary member, and a cylindrical elastic body that extends in the circumferential direction on the outside of the elastic body. A plurality of flexible and extensible members are arranged at intervals, and means for bending the members. 4￥ The underwater concrete placing device according to claim (2).
ｒＩ丁能に接続された円筒部材であって内側に軸線方向
へ伸びるらせん羽根を有する円筒部材と、該円筒部材を
回転させる手段と、前記円筒部材の径方向の外方にＬ下
方向へ移動可能に配置された接続部材と、該接続部材を
移動させる手段と、前記接続部材に上端で枢着された複
数のリブ部材を円周方向へ間隔をおいて有する開閉装置
と、該開閉装置を作動させるべく前記接続部材に設けら
れた手段とを含む、水中コンクリート打設装置。(5) a tremie tube, a cylindrical member that is rotatably connected to the tremie tube around an axis and has a spiral blade extending inwardly in the axial direction, and means for rotating the cylindrical member; , a connecting member disposed radially outwardly of the cylindrical member so as to be movable in the L downward direction; a means for moving the connecting member; and a plurality of rib members pivotally connected at the upper end to the connecting member. 1. An underwater concrete placing device comprising a circumferentially spaced switching device and means provided on the connecting member for actuating the switching device.
可撓性のシートを有する、特許請求の範囲第（５）項に
記載の水中コンクリート打設装置。(6) The underwater concrete placing device according to claim (5), wherein the opening/closing device has a flexible sheet attached to the rib member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19168583A JPS6085119A (en) | 1983-10-15 | 1983-10-15 | Underwater concrete placing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19168583A JPS6085119A (en) | 1983-10-15 | 1983-10-15 | Underwater concrete placing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6085119A true JPS6085119A (en) | 1985-05-14 |
| JPH025847B2 JPH025847B2 (en) | 1990-02-06 |
Family
ID=16278748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19168583A Granted JPS6085119A (en) | 1983-10-15 | 1983-10-15 | Underwater concrete placing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6085119A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6447831U (en) * | 1987-09-21 | 1989-03-24 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51140307A (en) * | 1975-05-28 | 1976-12-03 | Kajima Corp | Tremie pipe |
| JPS57202433U (en) * | 1981-06-16 | 1982-12-23 |
-
1983
- 1983-10-15 JP JP19168583A patent/JPS6085119A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51140307A (en) * | 1975-05-28 | 1976-12-03 | Kajima Corp | Tremie pipe |
| JPS57202433U (en) * | 1981-06-16 | 1982-12-23 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6447831U (en) * | 1987-09-21 | 1989-03-24 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH025847B2 (en) | 1990-02-06 |
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