JPH025847B2 - - Google Patents
Info
- Publication number
- JPH025847B2 JPH025847B2 JP58191685A JP19168583A JPH025847B2 JP H025847 B2 JPH025847 B2 JP H025847B2 JP 58191685 A JP58191685 A JP 58191685A JP 19168583 A JP19168583 A JP 19168583A JP H025847 B2 JPH025847 B2 JP H025847B2
- Authority
- JP
- Japan
- Prior art keywords
- cylindrical member
- concrete
- opening
- closing device
- cylindrical
- 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
- 239000004567 concrete Substances 0.000 claims description 84
- 238000005452 bending Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
- 239000000725 suspension Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 5
- 239000011178 precast concrete Substances 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000004568 cement Substances 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
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)
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.
水中にコンクリート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
れは、上端に漏斗を有し、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つて
コンクリートを水中の被打設場所へ導き、コンク
リートを打設する工法である。 A typical method for placing concrete underwater is a method using tremie pipes. It has a funnel at the top end and an open bore at the bottom end.
This is a method of pouring concrete by guiding the concrete to the place under water using a steel pipe called a tremie pipe of about 30 cm.
前記工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つてコ
ンクリートが分離してしまい、コンクリートはそ
の用をなさないことから、コンクリートの投入に
先だつてトレミー管内にコンクリートと水との接
触を断つべくスポンジ又はプランジヤを入れて栓
をし、この上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量が多くな
るにつれてスポンジ又はプランジヤはトレミー管
内を下降し、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 using the above method, if the concrete is simply poured into the tremie pipe, the concrete will separate due to the water that has entered the inside of the tremie pipe, and the concrete will not serve its purpose. Prior to pouring concrete, a sponge or plunger is inserted into the tremie pipe to prevent contact between the concrete and water, and the plug is plugged, and concrete is poured onto the pipe. Then, as the amount of concrete input increases, the sponge or plunger moves down inside the tremie pipe, and when it comes off the lower end of the tremie pipe, concrete is poured from the tremie pipe toward a predetermined place to be poured.
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つて、ス
ポンジやプランジヤに加わるコンクリートの重量
がスポンジやプランジヤに作用する浮力及び摩擦
力を大幅に上回ると、コンクリートはトレミー管
の下端の開口から噴流となつ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、
トレミー管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
よつ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 greatly exceeds the buoyancy and frictional forces acting on the sponge and plunger, the concrete becomes a jet from the opening at the lower end of the tremie pipe. The concrete will begin to gush out and the concrete will deteriorate significantly. Therefore,
Measures have been taken such as forming the tremie tube as a double tube consisting of a flexible inner tube and an outer tube with many holes, and increasing the frictional force by squeezing the inner tube with water pressure (Japanese Patent Laid-Open Publication No. 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
関係はないが、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、コンクリートが水と急激に接触
し、そのセメント分の拡散や流出、骨材の分離な
ど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, although it is not directly related to the problem of concrete gushing mentioned above, when concrete is poured from the tremie pipe toward the place to be poured, there is no protection from the uncured concrete poured earlier. When concrete comes into sudden contact with water, the diffusion and outflow of cement components and the separation of aggregates are unavoidable, resulting in a significant deterioration of the quality of concrete.
従つて、本発明の目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。 SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a concrete placing 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
生ず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 provide a concrete pouring device that can prevent as much as possible the deterioration of concrete quality that occurs at the beginning of concrete pouring.
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つて内
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 and having a spiral blade 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
あつ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. and,
There is provided an underwater concrete placing apparatus including an opening/closing device disposed below the cylindrical member and means for operating the opening/closing 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
あつ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上下方向へ移動可
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. and,
a connecting member disposed radially outwardly of the cylindrical member so as to be movable in the vertical direction; a means for moving the connecting member; and a plurality of rib members pivotally connected at the upper end to the connecting member in the circumferential direction. An underwater concreting device is provided which includes a switchgear spaced apart from the switchgear and means provided on the connecting member for actuating the switchgear.
以下、図面を参照して本発明の実施例について
説明する。 Embodiments of the present invention will be described below with reference to the drawings.
本発明に係るコンクリート打設装置１０は第１
図に示すように、トレミー管１２と、円筒部材１
４と、この円筒部材１４を回転させる手段１６と
を含む。 The concrete placing device 10 according to the present invention is a first
As shown in the figure, a tremie tube 12 and a cylindrical member 1
4 and means 16 for rotating the cylindrical member 14.
トレミー管１２はその上方の端部に漏斗（図示
せず）を有する鋼管からなり、その下方の端部に
円筒部材１４が後述するように回転可能に接続さ
れる。トレミー管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。
このトレミー管１２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
めの油圧ジヤツキ２０を支持する。 The tremie tube 12 is made of a steel tube having a funnel (not shown) at its upper end, and a cylindrical member 14 is rotatably connected to its lower end as will be described later. The tremie pipe 12 is formed to have an appropriate length depending on the depth of the place where concrete is to be poured.
An annular frame 18 is fixed to this tremie tube 12. 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と実質的に同じ
口径の鋼管からなり、その内側に軸線方向へ伸び
るらせん羽根２２を有し、いわゆるめねじコンベ
ヤを構成している。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の上方に複数のパ
ツド２６を介して円筒形の歯車２８が取り付けら
れている。他方、トレミー管１２の下方の端部に
断面がコの字形をした懸架部材３０が全周にわた
つて溶接されており、支持部材２４が懸架部材３
０の下方の水平片３１上にスラストベアリング３
２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。 The cylindrical member 14 is made of a steel tube having substantially the same diameter as the tremie tube 12, and has a helical blade 22 extending in the axial direction inside the cylindrical member 14, and constitutes a so-called female thread conveyor. At the upper end of the cylindrical member 14 is an annular support member 24, as shown in detail in FIG.
are welded to each other, and a cylindrical gear 28 is attached above the support member 24 via a plurality of pads 26. On the other hand, 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.
Thrust bearing 3 on horizontal piece 31 below 0
It is posted via 2. 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.
トレミー管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１
４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
気密に保つている。 A seal gasket 34 is provided between the opposing end surfaces of the tremie tube 12 and the cylindrical member 14, and a seal gasket 34 is provided between the inner peripheral surface of the horizontal piece 31 of the suspension member 30 and the cylindrical member 1.
Seal packings 36 are respectively disposed between the outer peripheral surfaces of the suspension members 30 and the outer peripheral surfaces of the suspension members 30 to keep the space 38 surrounded by the suspension member 30 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の上方
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ヤーナル
ベアリング１５とシールパツキン１７とが介在さ
れている。円筒部材１４に固着された支持部材２
４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
管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ツク３３を
貼り付けることが好ましい。 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 the upper end of the cylindrical member 14. . And the cylindrical member 14
A journal bearing 15 and a seal packing 17 are interposed between the tremie tube 12 and the horizontal piece 31 of the suspension member 30 and the cylindrical member 14, respectively. Support member 2 fixed to cylindrical member 14
4 is supported on a thrust bearing 32. In the examples shown in FIGS. 2 and 3, the contact portion between the tremie tube 12 and the cylindrical member 14, the cylindrical member 14
It is preferable to affix a low-friction plastic 33 such as polytetrafluoroethylene to the contact portion between the suspension member 30 and the suspension member 30.
回転手段１６は円筒部材１４を回転させる。図
示の例では、回転手段１６は懸架部材３０の上方
の水平片３９に固定された油圧モータ４０と、こ
の油圧モータ４０に接続されたピニオン４２と、
ピニオン４２に噛み合う歯車２８とからなる。油
圧モータ４０は配管４４を経て上方の作業船（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へ導入する部位には
シールパツキン４６が配置され、気密を保つてい
る。 The rotating means 16 rotates the cylindrical member 14. In the illustrated example, the rotation means 16 includes a hydraulic motor 40 fixed to the horizontal piece 39 above the suspension member 30, and a pinion 42 connected to the hydraulic motor 40.
It consists of a gear 28 that meshes with a pinion 42. The hydraulic motor 40 is connected to a pump of an upper work boat (not shown) via a pipe 44, and is supplied with hydraulic pressure. The rotation speed of this hydraulic motor 40 is variable. A seal packing 46 is arranged at a portion where the pipe 44 is introduced into 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５
０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
仮想円の接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 switchgear 5
0 includes four rib members 52 made of steel and a sheet 54 of flexible high-tensile fibers, 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, and the short sides 53 are tangents to 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 positioned 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６０を支点
として開閉可能である。この結果、リブ部材５２
とシート５４とは接続部材５６と相まつてかさ状
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 60 as a fulcrum. As a result, the rib member 52
Together with the connecting member 56, the sheet 54 constitutes 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が接続部材５６に枢着されており、この
油圧ジヤツキ６４のロツドの端部がリブ部材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５
２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, which is a means for operating the opening/closing device 50, is pivotally connected to the connecting member 56, and the end of the rod of the hydraulic jack 64 is connected to the rib member 52.
It is pivoted to. 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-shaped body 62
from the closed state shown by the solid line in FIG. 1 to the half-open state where the rib member 52 is vertical, and further
It can be opened and closed to the fully open state where 2 is almost 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に沿つて上下方向へ移動
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つの油圧ジヤツキ２０のロツ
ド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。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、円筒部材１４の外方を上
下に移動できる。 The connecting member 56 is made of an annular member. The connecting member 56 is inserted so as to be movable in the vertical direction along the cylindrical member 14, and the cylindrical member 14 is rotatable relative to the connecting member 56. On the other hand, the rods 21 of the four hydraulic jacks 20 supported by the frame 18 penetrate 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. As a result, the connecting member 56 can move up and down outside the cylindrical member 14 when the umbrella-like body 62 is half-open or fully open.
第５図に示す開閉装置７０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 70 shown in FIG. 5 includes an auxiliary member 72,
It includes a cylindrical elastic body 74 such as rubber and a plurality of bendable and extensible members 76. 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８０
とからなる。内側部材７８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
ロツド８４を被懸架部材８２に固着し、内側部材
７８は円筒部材１４に沿つ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 includes two inner members 78 and two outer members 80 spaced apart in the axial direction.
It consists of. Inner member 78 is cylindrical and has an inner diameter slightly larger than the outer diameter of cylindrical member 14 . An annular suspended member 82 is attached to the upper inner member 78.
is fixed. The lower end of the cylindrical member 14 is inserted into this inner member 78, and on the other hand, a plurality of support rods 84 fixed to the suspension member 30 (FIG. 1) of the tremie tube are fixed to the suspended member 82, and the inner member 78 is fixed to the suspended member 82. is immovably supported along the cylindrical member 14, and the cylindrical member 14 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８８は開口端に向けて先細状とな
つた傾斜面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を貫通するボルト９６にナ
ツト９８をねじ込んで、両外側部材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 portion 88 includes an inclined surface 90 tapered toward the opening end and a cylindrical portion 91 surrounding this inclined surface 90.
and has. 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. Both outer members 80 are coupled by engaging the portion 94 outwardly in the axial direction of the mounting portion 88 of the inner member 78 and screwing a nut 98 into a bolt 96 passing through both flanges 95.
屈伸可能な部材７６は複数設けられ、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、ほぼ三角形をした２つのリンク
体１００，１０２を備える。リンク体１００は、
ピストンロツド１０４のアイ１０５に回転可能に
連結されており、他方、リンク体１０２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
とをピストンロツド１０４で懸架したときの自由
長さL1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７
６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、ピストンロツド１０４
を上方の取付部８８から上方向へ突出させると、
両リンク体は両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。 A plurality of bendable and extensible members 76 are provided and arranged at intervals in the circumferential direction. This member 76 is the sixth
As shown in the figure, it includes two link bodies 100 and 102 that are approximately triangular in shape. The link body 100 is
Piston rod 104 is rotatably connected to eye 105, while link 102 is rotatably connected to link 100 via its eye 103. Link body 100 and link body 102
The free length L 1 when the two inner members 78 are suspended by the piston rod 104 is slightly larger than the distance L 2 between the opposing mounting portions 88 of the two inner members 78 .
The bending and stretching member 7 includes this pair of link bodies.
6 are arranged within the interval, the lower link body 102 is brought into contact with the lower mounting part 88, and the piston rod 104
When the is made to protrude upward from the upper mounting part 88,
As a result of both link bodies being restrained by both attachment parts, the eye 103 is held in a state slightly protruding inward in the radial direction, as shown in FIG.
ピストンロツド１０４は開閉装置７０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８０
の支持部９４に円周方向へ間隔をおいて設けられ
た凹部１０７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１０６に油圧が
供給されると、ピストンロツド１０４が伸長し、
屈伸部材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。そしてピストンロツド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 into the cylinder of a hydraulic jack 106 which is the means for actuating the opening/closing device 70. This hydraulic jack 106 is connected to the outer member 80
A pipe 108 connected to a hydraulic jack 106 is arranged in a recess 107 provided at intervals in the circumferential direction in the support part 94 of the work boat, and is connected to a pump of the work boat and receives a supply of hydraulic pressure. When hydraulic pressure is supplied to the pump 106, the piston rod 104 extends,
The bending/stretching member 76 bends radially inward to squeeze the elastic body 74 inward as shown by the imaginary line. And when the piston rod 104 contracts,
The elastic body 74 returns to its original state due to its elasticity.
第１図に示すコンクリート打設装置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の全長を水深に応じ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し、コンク
リート打設装置１０を水中のコンクリート被打設
場所へ配置する。開閉装置５０を閉じ、コンベヤ
１１０からトレミー管１２および円筒部材１４へ
コンクリートを投入し、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
ート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５０を徐々に拡げながら、コンクリートの打設
速度に合せて開閉装置５０を油圧ジヤツキ２０に
より上昇させ、円筒部材１４の先端を先打ちコン
クリート１１２中に埋め込ませる(c)。これによつ
てセメント成分の流出、拡散を抑止する。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１１２中に完全に埋め込まれる
と、開閉装置５０は上方へ引き上げられ、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、コンクリート打設装置１０を
引き上げ（ｅの仮想線）、開閉装置５０を閉じ、
次の被打設場所へコンクリート打設装置１０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ート１１４
を打設する(f)。このようにして、広い面積にわた
つて水中コンクリートの施工が可能となる。 The operation of the concrete placing apparatus 10 shown in FIG. 1 will be explained with reference to FIG. 7. First, the entire length of the tremie pipe 12 is lengthened by appropriately adding parts according to the water depth, or is shortened except for the added parts, and the concrete placing device 10 is placed at a place where concrete is to be poured underwater. The opening/closing device 50 is closed, concrete is introduced from the conveyor 110 into the tremie pipe 12 and the cylindrical member 14, and the concrete is filled.
(a). The rotational speed of the cylindrical member 14 is adjusted to appropriately select the concrete placing speed, and the opening/closing device 50 is gradually opened to prevent rapid contact between concrete and water and to suppress the flow speed of concrete. Start pouring concrete (b). While gradually expanding the opening/closing device 50, the opening/closing device 50 is raised by the hydraulic jack 20 in accordance with the concrete placing speed, and the tip of the cylindrical member 14 is embedded in the pre-cast concrete 112 (c). This prevents the cement components from flowing out and spreading. When the concrete placement progresses and the tip of the cylindrical member 14 is completely embedded in the pre-cast concrete 112, the opening/closing device 50 is pulled upward and held half open (d). In this state, a predetermined amount of concrete is poured. After placing a predetermined amount of concrete, the concrete placing device 10 is pulled up (imaginary line e), the opening/closing device 50 is closed,
The concrete placing device 10 is moved to the next place to be poured (e). By repeating the same operation again,
Concrete 114 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、また流
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ートの施工
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, by changing the rotational speed of the cylindrical member,
Since the mix of concrete can be changed, and even when using concrete with different fluidity, the casting speed can be freely changed according to the workability, it is possible to construct high-quality concrete. Additionally, 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 constructed.
一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。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つた。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、わずかな量の水であ
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。 Generally, when placing underwater concrete using tremie pipes, the general rule is to pour concrete continuously from the start to the end.
The tremie pipe may be pulled out of the pre-cast concrete during pouring. 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, the user had no choice but to stop typing. However, in the present invention, since the concrete is press-fitted using the cylindrical member, almost no water inflow occurs, and even if water does enter, as long as it is a small amount of water, it is possible to remix the concrete 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つてコンクリートを静
かに、ゆつ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止
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. It is possible to prevent the outflow of cement components due to contact with the cement. In addition, since the opening/closing device can suppress the flow speed of concrete, it is possible to prevent water from being drawn in when concrete flows, and to suppress disturbance of concrete.
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つ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, if the switchgear is equipped with a means to move it up and down, the switchgear can reduce the flow rate of concrete to suppress the spread of concrete, and the switchgear can be gradually raised as concrete is placed. It is easy to insert the component into pre-cast concrete, and once the cylindrical component is inserted into the pre-cast concrete, underwater concrete can be poured with the concrete and water cut off, so there is almost no deterioration of the concrete. Does not occur.
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
円筒部材と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
設装置によつ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；回転手段、２０；油
圧ジヤツキ、２２；らせん羽根、５０，７０；開
閉装置、５２；リブ部材、５４；シート、５６；
接続部材、７２；補助部材、７４；弾性体、７
６；屈伸部材。
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. 4 is an enlarged plan view of the opening/closing device, showing the opened state, FIG. 5 is a sectional view showing another example of the opening/closing device, FIG. 6 is a front view of the folding member, FIGS. 7a to 7f are explanatory diagrams showing a state in which concrete is placed by a concrete placing device. 10; Concrete placement device, 12; Tremie pipe, 14; Cylindrical member, 16; Rotating means, 20; Hydraulic jack, 22; Helical blade, 50, 70; Opening/closing device, 52; Rib member, 54; Sheet, 56;
Connection member, 72; Auxiliary member, 74; Elastic body, 7
6; Bending member.
Claims (1)
回転可能に接続された円筒部材であつて内側に軸
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。 ２ 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つて内側に軸
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。 ３ 前記開閉装置は円周方向へ間隔をおいて配置
された複数のリブ部材であつ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。 ４ 前記開閉装置は前記円筒部材に装着された円
筒状の補助部材と、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周
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、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。 ５ 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つて内側に軸
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
径方向の外方に上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。 ６ 前記開閉装置は前記リブ部材に取り付けられ
た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。[Scope of Claims] 1. A tremie tube, a cylindrical member rotatably connected to the tremie tube around an axis, and having a helical blade extending inward in the axial direction;
and means for rotating the cylindrical member. 2. a tremie tube, a cylindrical member rotatably connected to the tremie tube around an axis, and having a helical blade extending inward in the axial direction;
An underwater concrete placing apparatus comprising means for rotating the cylindrical member, an opening/closing device disposed below the cylindrical member, and means for operating the opening/closing device. 3. The opening/closing device includes a plurality of rib members arranged at intervals in the circumferential direction, which can be opened and closed using the upper end as a fulcrum, and a flexible sheet attached to the rib members. , an underwater concrete placing device according to claim 2. 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 an interval in the circumferential direction on the outside of the elastic body. 3. The underwater concrete placing apparatus according to claim 2, comprising a plurality of bendable and extensible members arranged at a distance, and means for bending the members. 5. a tremie tube, a cylindrical member rotatably connected to the tremie tube around an axis, and having a spiral blade extending inward in the axial direction;
means for rotating the cylindrical member; a connecting member disposed radially outwardly of the cylindrical member so as to be movable in the vertical direction; means for moving the connecting member; An underwater concrete placing device comprising: a switchgear having a plurality of rib members circumferentially spaced apart from each other; and means provided on the connecting member to operate the switchgear. 6. Claim 5, wherein the opening/closing device has a flexible sheet attached to the rib member.
Underwater concrete placement equipment as described in Section.
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 JPS6085119A (en) | 1985-05-14 |
| JPH025847B2 true 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) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0629208Y2 (en) * | 1987-09-21 | 1994-08-10 | 清水建設株式会社 | Aggregate loading device for prepacked concrete method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51140307A (en) * | 1975-05-28 | 1976-12-03 | Kajima Corp | Tremie pipe |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6015788Y2 (en) * | 1981-06-16 | 1985-05-17 | 五洋建設株式会社 | tremie tube device |
-
1983
- 1983-10-15 JP JP19168583A patent/JPS6085119A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51140307A (en) * | 1975-05-28 | 1976-12-03 | Kajima Corp | Tremie pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6085119A (en) | 1985-05-14 |
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