JPH068570B2 - Construction equipment for concrete structures such as dams and piers - Google Patents

Description

TECHNICAL FIELD The present invention relates to an apparatus for constructing a concrete structure such as a dam or a bridge pier.

"Problems to be solved by the conventional technology and invention" In the construction of concrete structures such as dams and piers,
A so-called step-form construction method is used in which the formwork is rearranged upward and the concrete is spliced.

In this case, the rearrangement of the formwork is often performed by a few skilled workers using a crane.

However, in this case, only one unit can be relocated at a time, which is inefficient.

A lot of labor and time are required for attaching / detaching bolts such as dummy bolts, sea bolts, and support bolts.

It is often done in high places, and working on a form suspended by a crane involves considerable danger.

 Requires abundant experience and skill of workers.

There are drawbacks such as.

Therefore, in recent years, a movable formwork has been proposed in which the formwork is provided with a self-raising means (eg, JP-A-53-125330 and JP-A-54).
-63521, JP-A-54-108430).

However, in this case, although the formwork can be raised by the raising means, inputting and removing of the dummy bolts, sea bolts, support bolts, etc. are still required, and a lot of labor is required for the attachment and detachment work of the bolts. It takes time.

 Two steps of scaffolding are required for bolt attachment / detachment work.

There are drawbacks such as.

The present invention seeks to eliminate such conventional drawbacks and also enables remote control.

"Means for Solving Problems" First, the first invention is an anchor bolt embedded in a concrete for placing, and an anchor that is detachably screwed to a tip of the anchor bolt and protrudes to the outside of the concrete for placing. A movable frame is provided with a fixed frame and a movable frame which project downward, and a movable frame is provided with a frame raising device, and the fixed frame and the movable frame are attached to and detached from the anchor hardware. An engaging device that freely engages is provided, and a lock sliding cylinder that fits around the anchor metal object is detachably attached to the installed anchor metal object, and the tip of the lock sliding cylinder is provided. A lock device for inserting and removing the lock pin from the side is attached to the part.
A pin hole into which the lock pin is fitted is bored in the anchor metal object, and an anchor holding device is provided on the face plate of the movable formwork in correspondence with the engaging device and the one step length rising position. To do.

Next, a second aspect of the present invention is to provide an anchor bolt to be embedded in the cast concrete, and an anchor metal piece that is detachably screwed to the tip of the anchor bolt and protrudes to the outside of the cast concrete. A fixed frame and a movable frame projecting downward, and a mold raising device on the movable frame, and an engaging device for detachably engaging the anchor metal with the fixed frame and the movable frame. The engaging device is provided with a movable engaging means having an engaging pin laterally provided at a tip end thereof, and the anchor metal is formed with an engaging groove for engaging with the engaging pin. It is characterized in that an anchor holding device is provided on the face plate of the movable formwork so as to correspond to the engaging device and the one-step length rising position.

"Operation" The above-described configuration will be described below. The operation will be described below, but the first and second inventions will be described together, except that a different operation causes a different operation.

In construction, embed a plurality of anchor bolts with anchor metal fittings at the tips in appropriate places on the lower concrete that was previously placed in advance, and make each anchor metal hardware protrude outside the concrete. The metal frame is engaged with the respective engaging devices of the fixed frame and the movable frame of the movable form frame.

For this engagement, in the case of the first invention, in the engagement device,
The lock slide cylinder is advanced and fitted around the anchor metal object, and the lock device is operated to insert the lock pin from the side end into the pin hole of the lock metal cylinder or the pin hole of the anchor metal object. Further, in the case of the second aspect, the movable engaging means of the engaging device is advanced to engage the engaging pin at the tip end with the engaging concave groove of the anchor metal member.

When relocating the movable formwork, first, the engaging device of the fixed frame is disengaged from the anchor metal fitting provided in the splicing lower layer concrete in the reverse order of the above procedure, and the movable formwork is moved by the formwork lifting device. Step up, and at that position the engagement device of the fixed frame engages similarly with the anchor hardware provided on the splice upper layer concrete as before to support the mobile formwork in its raised position. Next, the engaging device of the movable frame is disengaged from the anchor metal piece provided in the splicing lower layer concrete in the reverse order of the above procedure, and the movable formwork is raised by one step by the formwork raising device, and its position Then, the engaging device of the movable frame is engaged with and supported by the anchor metal fitting provided on the splicing upper layer concrete in the same manner as the previous time.

For each anchor holding device of the face plate of the movable formwork that has been raised by one step, temporarily hold the anchor bolt with the anchor metal attached to the tip with the anchor metal, pour the concrete, and use the anchor bolt as in the previous time. Immobilize and fix. The anchor hardware is detached from the anchor holding device when the movable mold is released from the mold.

Thereafter, in the same manner, the mobile formwork is rearranged, concrete is spliced one after another, and anchor bolts are driven to construct a required concrete structure.

In addition, the unnecessary anchor hardware is removed from the anchor bolt and diverted.

"Example" FIGS. 1 to 8 show an example of a construction apparatus according to the present invention.

1 and 2 show the construction apparatus as a whole, in which A is a movable formwork and B is an anchor.

The movable form A has a plurality of face plate advancing / retreating devices 3 in which face plates 2 having the same rectangular shape are arranged in front of a horizontally long rectangular main frame 1 and the face plates are arranged at various places of the main frame 1.
The main frame 1 is supported so that it can be moved forward and backward and the tilt can be adjusted.
In the center, a slender fixed frame 4 projecting downward is provided, and guide frames 51, 51 projecting downward are provided on the left and right, and slender movable frames 5, 5 sliding vertically along the guide frame. Mounted, the lifting device 6 is mounted between the movable frame and the main frame 1, and the engaging devices 7 and 7 are provided above and below the protruding portions of the fixed frame 4 and the movable frames 5 and 5, respectively. Anchor holding device 8 is placed at an appropriate position on the face plate 2 in correspondence with the one step length rising position from the device.
Is provided. In addition, the corridor 12
Is attached.

The fixed frame 4 and the movable frames 5, 5 are the main frame 1
Is formed to have a length approximately twice the vertical width of the main frame 1, the lower half of which is projected downward from the main frame 1
One engaging device 7, 7 and an anchor holding device 8 provided on the face plate 2
And are positioned on the straight line in the vertical direction at equal intervals with one step length.

The anchor B is composed of anchor bolts 9 embedded in the cast concrete C ₁ , C ₂ , C ₃ ... And an anchor metal 10 which is detachably screwed to the tip of the anchor bolts.

The face plate advancing / retreating adjusting device 3 ... Moves the rod 31 arranged in the vertical direction with respect to the main frame 1 through the speed reducer 33 by the reversible motor 32 to move the rod 31 in and out.
33 is fixed to the proper position of the main frame 1, and the face plate 2 is pivotally attached to the tip of the rod 31 so as to be tiltable. Thus, each reversible motor
The normal rotation of 32 causes the rods 31 to slowly move back and forth through the speed reducer 33, to adjust the position and inclination of the face plate 2 and to obtain a peeling action after concrete placement.

In the frame raising device 6, 6, the screw rod 61 is arranged along the upper half of the movable frame 5 so as to be supported on the upper and lower parts of the main frame 1, and the upper part of the movable frame 5 is screwed onto the screw rod. Then, the screw rod 61 is rotated forward and backward by the reversible motor 62 fixed to the upper end of the main frame 1. Therefore, in the mold raising devices 6 and 6, the screw rod 61 is normally rotated by the normal rotation of the reversible motor 62, and the parts other than the movable frame 5 are lifted. Rises.

As shown in FIGS. 3 and 4, the engagement devices 7 ... In the fixed frame 4 and the movable frames 5 and 5, a cylinder guide 71 is provided in a direction perpendicular to the fixed frame 4 and the movable frames 5 and 5, and a tip end is provided in the cylinder guide. A lock sliding cylinder 72 that opens forwards and backwards is provided, a screw rod 73 is screwed in the cylindrical direction at the center of the rear end of the lock sliding cylinder, and the screw rod is driven by a reversible motor 74 via a speed reducer 75. The reversible motor and the speed reducer are fixed to appropriate positions of the fixed frame 4 or the movable frames 5 and 5, respectively.

Further, the engaging devices 7 ... As shown in FIGS. 3 and 4,
A lock device 76 is provided at the tip of the lock sliding cylinder 72. The lock device is provided with through holes 721, 722 communicating left and right at the tip of the lock sliding cylinder 72, and a lock pin guide 723 is provided in communication with one through hole 721.
A sloping lock pin 724 to be inserted into both the through holes 721 and 722 is arranged in the lock pin guide, a rack 725 is projectingly provided from a rear end of the lock pin, and a pinion 726 is engaged with the rack to make the pinion a reversible motor. A reciprocating motor and a speed reducer are fixed to a lock pin guide 723 so that the reversible motor and the speed reducer are rotated in the forward and reverse directions via a speed reducer 728.

In the engagement device 7 ... In the state shown in FIG. 3, when the reversible motor 74 rotates in the normal direction, the screw rod 73 slowly rotates in the normal direction via the speed reducer 75, and the lock sliding cylinder 72 moves forward. And is fitted on the outer side of the anchor metal item 10, and the lock device 76 continues to operate to be in the locked state. This locking device 76
When the reversible motor 727 rotates in the forward direction, the pinion 726 slowly rotates in the forward direction via the speed reducer 728, the rack 725 is paid out, and the lock pin 724 is locked by the through hole 72 of the lock sliding cylinder 72.
Inserted into the pin holes 104 of the 1,722 and anchor hardware 10,
It will be in the locked state shown in the figure. That is, the state shown in FIG. 4 is in the engagement state. Release this engagement posture,
To disengage, you just need to get the above reverse action.
The reversible motor 727 and then the reversible motor 74 may be reversed.

It should be noted that it is convenient to form the lock sliding cylinder 72 to have a slightly larger diameter so that the lock sliding cylinder 72 is loosely fitted to the anchor metal piece 10. In this case, the load may be directly transmitted from the lock sliding cylinder 72 to the anchor metal item 10 or may be transmitted from the lock pin 724.

The anchor holding devices 8 ...
Fitting recess 81 to which the anchor metal fitting 10 can be detachably fitted in place
Is provided, and a through hole 82 is formed in the center of the fitting recess, and the fitted anchor metal piece 10 is screwed 83 to the fitting recess 81 by the through hole. Although not shown, it is preferable to fit a key so that the anchor metal piece 10 has a fixed direction.

As shown in FIGS. 6 to 8, the anchor metal piece 10 has a rear end portion of a short cylindrical main body 101 formed in a tapered shape, and
A screw hole 102 for screwing with the anchor bolt 9 is provided on the rear surface, the screw hole 103 for fixing the screw 83 is provided on the front surface, and a beveled pin hole 104 is provided midway.

Immediately before placing concrete, the anchor holding device 8 is provided with the anchor metal 10 screwed with the anchor bolt 9 in a predetermined direction in which the pin hole 104 matches the inserting direction of the lock pin 724. Mounting. In this attachment, the anchor metal piece 10 is held by the screw 83, and when detached, the screw 83 is removed. A key may be used to determine the direction.

FIG. 13 shows the dam construction method using the above-mentioned construction apparatus in order of construction method. It should be noted that i is a diagram of the building apparatus viewed from the back, and ii is a diagram of the apparatus viewed from the side. In the figure, C ₁ , C ₂ , C ₃ ... Are the first stage and the second stage.
It is a pouring concrete that has been successively spliced with steps, third steps, and so on. In the following, description will be given in order according to the drawings.

I. This is the state immediately after the jointing of the third-stage concrete C ₃ .

A plurality of anchor bolts 9 ... Are embedded in appropriate places on the first and second-stage concrete C ₁ and C ₂ , and anchor metal pieces 10 ... are screwed onto the tips of these anchor bolts to project outside the concrete. The movable frame A is supported by engaging the anchor hardware with the engaging devices 7 of the fixed frame 4 and the movable frames 5 and 5. Further, anchor metal fittings 10 ... in which anchor bolts 9 are screwed are attached to the plurality of anchor holding devices 8 of the face plate 2, and these anchor bolts 9 ... Are embedded in the third-stage concrete C ₃ . .

II. By operating the face plate advancing / retreating adjusting devices 3 ..., The face plate 2 is separated from the third-stage concrete C ₃ and the anchor holding devices 8 ... Are separated from the anchor metal parts 10. Also,
The upper and lower two engaging devices 7, 7 of the fixed frame 4 are provided in the first stage,
Concrete C ₁ of the second stage, disengaging C ₂ from the anchor hardware 10 .... As a result, the slanted line portion of the figure becomes free.

The III form raising devices 6 and 6 are activated to move the movable form A, specifically, the main frame 1, the face plate 2, and the fixed frame 4 up by one step.

IV. At its raised position, the upper and lower engaging devices 7, 7 of the fixed frame 4 are engaged with the anchor metal fittings 10, 10 of the second and third stages of concrete C ₂ , C ₃ to support the movable form A. .

V. The first stage of the two upper and lower engagement device 7, 7 of the movable frames 5 each, disengaging from the second stage of the concrete C _1, C ₂ of the anchor fittings 10,10. As a result, the shaded area in the figure becomes free.

VI. The mold raising devices 6 and 6 are reversely operated to raise the movable frames 5 and 5 by one step, and the upper and lower two engaging devices 7 and 7 of the movable frames 5 and 5 are used for concrete C _{2 of} the second and third stages. , C ₃ anchor metal fittings 10, 10. Also,
The face plate advancing / retreating adjusters 3 are moved back to advance the face plate 2 to a predetermined position, and the position and inclination of the face plate 2 are adjusted. Further, the anchor bolt 9 is attached to the anchor holding device 8 of the face plate 2.
Anchor hardware 10 screwed with ... is held.

Then, the fourth-stage concrete C ₄ is spliced on the third-stage concrete C ₃ and the anchor bolts 9 are embedded.

Thereafter, the above I. To VI. Repeat. Also, the used anchor metal pieces 10 ... Are removed from the corridor 12 and used again.

9 to 12 show other examples of the engagement device 7 and the anchor metal piece 10.

In this case, in the above-described engagement device 7, the lock device 76 is removed, and the engagement pin 77 is installed at the tip of the lock slide cylinder 72 in the lateral direction. Also, in the anchor hardware 10,
An engaging groove formed by removing the pin hole 104, forming a rectangular cross section, and opening upward at the front part corresponding to the engaging pin 77.
105 is provided.

Then, in the engagement, the movable form A is slightly over-elevated, the lock slide cylinder 72 is advanced, the movable form A is lowered to a fixed position, and the engagement pin 77 is anchored. Engagement groove 105 of metal 10 is engaged. When leaving, the above operations are reversed.

In addition, in the vicinity of the engaging device 7, the engaging pin 77 and the engaging groove are formed.
In order to eliminate the play of engagement with 105, it is desirable to provide a pressing device 11.

In this pressing device 11, in the engaging device 7, the locking device 76 is removed and the locking sliding cylinder 72 is pressed.
Instead of 112, a contact plate 116 is attached to the tip of the pressing sliding cylinder. In the figure, 111 is a cylinder guide provided on the fixed frame 4 or the movable frames 5 and 5, 113 is a screw rod screwed to the rear end of the pressing slide cylinder 112, and 114 and 115 are for rotating the screw rod. A reversible motor and a speed reducer provided on the fixed frame 4 or the movable frames 5 and 5.

The pressing device 11 engages the engagement pin 77 of the engagement device 7 with the engagement groove 105 of the anchor metal 10 and then the reversible motor 1
By rotating 14 normally, the pressing slide cylinder 112 is advanced in the same manner as the engaging device 7, and the contact plate 116 is pressed against the concrete surface, and the play between the engaging pin 77 and the engaging concave groove 115 is removed. . When releasing the engagement between the engagement pin 77 and the engagement groove 105, the reversible motor 114 is reversely rotated in advance and the contact plate 116 is retracted.

The series of operations in the movable form A described above is configured so that its movement is electrically detected by an electric limit switch or the like, and sequence control is performed by the detection signal to obtain automation.

Further, although various reversible motors are used in the above embodiments, not only the electric type but also the hydraulic type and the like are suitable. Instead of the reversible motor, a hydraulic or pneumatic cylinder may be used.

"Effects of the Invention" According to the present invention, it is possible to automatically rearrange a mold without using a lifting machine such as a crane, and it is possible to rearrange a plurality of molds at the same time. It is possible to omit manual attachment / detachment work of sea bolts, support bolts, etc., and to significantly improve work efficiency.

In addition, it can be operated remotely from outside the device, safe work at high places can be performed, skilled workers are not required, and the anchor hardware after use can be removed from the corridor by using the device and can be used many times. The cost can be reduced significantly.

[Brief description of drawings]

The drawings are embodiments of the present invention, and FIGS. 1 to 8 show an example of a dam construction device. FIG.
The figure is a side view of the same, FIG. 3 is an enlarged cross-sectional plan view of the engaging device before engagement, which is a main part, FIG. 4 is an enlarged cross-sectional plan view of the engaging device after the engagement, and FIG. FIG. 6 is an enlarged sectional side view of the barrel anchor holding device, FIG. 6 is an enlarged sectional plan view of an anchor metal piece which is a main part, FIG. 7 is a side view thereof, FIG. 8 is a front view thereof, and FIGS. The figure shows another example of the main part,
The figure shows an enlarged cutaway side view of the engagement device after engagement.
FIG. 10 is an enlarged sectional plan view of the anchor metal piece, FIG. 11 is a side view of the same, FIG. 12 is a front view of the same, and FIG. 13 is an explanatory view showing a dam construction method. A ... movable mold B ... anchor _{C 1, C 2, C 3} , C 4, ... pouring concrete 1 ... main frame 2 ... faceplate 3 ... faceplate advance adjustment device 4 ... fixed frame 5 ... movable frame 6 ... mold Lifting device 7 ... Engaging device 8 ... Anchor holding device 9 ... Anchor bolt 10 ... Anchor hardware 11 ... Pressing device 12 ... Walkway 31 ... Rod 32 ... Reversible motor 33 ... Reducer 51 ... Guide frame 61 ... Screw rod 62 ... Reversible motor 71 ... Cylinder guide 72 ... Lock sliding cylinder 73 ... Screw rod 74 ... Reversible motor 75 ... Reducer 76 ... Lock device 77 ... Engaging pin 721,722 ... Through hole 723 ... Lock pin guide 724 ... Lock pin 725 Rack 726 ... Pinion 727 … Reversible motor 728… Reducer 81… Mating recess 82… Through hole 83… Screw 101… Main body 102,103… Screw hole 104… Pin hole 105… Engagement groove 111… Cylinder guide 112… Pressing sliding cylinder 113… Screw rod 114 Reversible motor 115 ... reduction gear 116 ... contact plate

Front page continuation (72) Inventor Akio Suzuki 2-5-14 Minamisuna, Koto-ku, Tokyo Inside the Takenaka Corporation Technical Research Institute (72) Inventor Tadaharu Hagiwara 2-5-14 Minamisuna, Koto-ku, Tokyo Shares Incorporated Takenaka Corporation Technical Research Institute (72) Inventor Takafumi Ishigaki 2-5-14 Minamisuna, Koto-ku, Tokyo Incorporated Takenaka Industrial Technology Research Institute (72) Inventor Hiroshi Sakurai 8-21 Ginza, Chuo-ku, Tokyo No. 1 Incorporated Takenaka Civil Engineering (72) Inventor Masanori Kanno 8-21 Ginza, Chuo-ku, Tokyo No. 1 Incorporated Takenaka Civil Engineering (72) Inventor Kiyoyoshi Sakamoto 8-21, Ginza, Chuo-ku, Tokyo No. 1 Incorporated Takenaka Civil Engineering (72) Inventor Shiro Suzuki 8-21-1, Ginza, Chuo-ku, Tokyo Incorporated Takenaka Civil Engineering (72) Inventor Mitsumasa Kano 8-21-1, Ginza, Chuo-ku, Tokyo Takenaka Civil Engineering Co., Ltd. (72) Inventor Kihachiro Akiyama 4-12-2 Narashino, Funabashi City, Chiba Nippon Light Metals Co., Ltd. In Funabashi Plant (72) Inventor Shinichi Matsuhashi 4-12-2 Narashino, Funabashi City, Chiba Nippon Light Metals Co., Ltd. In Funabashi Plant

Claims (4)

[Claims] 1. An anchor bolt to be embedded in cast concrete, and an anchor metal fitting detachably screwed to the tip of the anchor bolt to project outside the cast concrete, and the movable formwork is downwardly moved. A projecting fixed frame and a movable frame are provided, a mold raising device is provided on the movable frame, and an engaging device that detachably engages with the anchor metal object is provided on the fixed frame and the movable frame.
A lock sliding cylinder that fits around the anchor metal object is detachably attached to the installed anchor metal object in the engaging device, and a lock pin for laterally inserting and removing the lock pin to the tip of the lock sliding cylinder is provided. A device is attached, and a pin hole into which the lock pin is fitted is formed in the anchor metal object,
An apparatus for constructing a concrete structure such as a dam or a bridge pier, wherein an anchor holding device is provided on the face plate of the movable formwork in correspondence with the engaging device and the one-step length rising position. 2. An anchor bolt to be embedded in cast concrete, and an anchor metal fitting that is detachably screwed onto the tip of the anchor bolt and projects outside the cast concrete, and the movable formwork is directed downward. A projecting fixed frame and a movable frame are provided, a mold raising device is provided on the movable frame, and an engaging device that detachably engages with the anchor metal object is provided on the fixed frame and the movable frame.
The engaging device is provided with a movable engaging means having an engaging pin laterally provided at a tip end thereof, and the anchor metal is formed with an engaging concave groove for engaging with the engaging pin. An apparatus for constructing a concrete structure such as a dam or a bridge pier, characterized in that an anchor holding device is provided on the face plate of the formwork so as to correspond to the above-mentioned engaging device and the one-step length rising position. 3. A plurality of face plate advancing / retreating devices are arranged at various places of the movable mold, and these face plate advancing / retreating devices are provided with rods which move in and out from the main body in a vertical direction, and the face plates are attached to the tips of these rods. A device for constructing a concrete structure such as a dam or a bridge pier according to claim (1), which is pivotally mounted so as to be tiltable. 4. A plurality of face plate advancing / retreating adjusters are arranged at various places of the movable form, and these face plate advancing / retreating adjusters are provided with rods which move in and out vertically from the main body, and the face plates are attached to the tips of these rods. A device for constructing a concrete structure such as a dam or a bridge pier according to claim (2), which is pivotally mounted so as to be tiltable.