JPH07113201B2 - Construction method and equipment for PC paving slab - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for constructing a high-strength PC pavement slab used for pavement at an airfield or the like.

[0002]

2. Description of the Related Art PC pavement slabs having excellent properties such as strength, abrasion resistance, deformation resistance, weather resistance and durability are often used for pavement at airfields. The PC paving slab is, for example, 100 m long and 7.5 m wide on the ground to be constructed.
The pavement will be installed with prestressing. In the construction of such a PC pavement plate, a PC tension is arranged in a lattice form, for example, 25 to 25 on a side as a post tension method.
Arrange them on the ground so as to form a rectangular grid of about 30 cm, place the concrete of the plate, and after curing the concrete, insert the PC steel material into the sheath, tension the PC steel material and introduce prestress into the concrete. To produce a plate. In this case, conventionally, the sheath was arranged manually in a grid pattern, the intersections were bound, and the sheath was lifted from the ground.
I poured concrete. Such manual labor requires a great deal of labor and a long construction period, which hinders quick construction of the PC paving slab.

[0003]

[SUMMARY OF THE INVENTION The present invention, sheath disposed in construction of such a PC pavement, cohesion, mechanized height Positioning steps on the ground, automated, high in PC pavement It enables efficient construction. The present inventors previously provided a binding support metal fitting for binding vertical and horizontal sheaths and supporting on the ground (Japanese Patent Application No. 3-175155). As a result, the support fitting is capable of binding both as a binding and as a spacer on the ground in one operation by pressing it from above to the intersection of the vertical sheath and the horizontal sheath to close the opening. It is an object of the present invention to use this binding support metal fitting to quickly bind the sheath and hold the position on the ground. At the same time, unlike steel bars and PC steel materials, materials such as thin iron plates
The sheath, which consists of a tube, is bent, dented, bent, etc.
Instead, it is necessary to carry out the above series of constructions.

[0004]

According to the present invention, a flat ground on which a PC paving slab is to be formed is formed, and long vertical sheaths are arranged in parallel in the longitudinal direction at regular intervals on the ground. Lift to a certain height from the ground, supply and hold horizontal sheaths on this vertical sheath at regular pitches, bind the intersections of the vertical sheath and the horizontal sheath, and at the same time perform vertical positioning of the bound sheath on the ground, By repeatedly supplying and holding the horizontal sheaths, bundling, and vertically positioning, a lattice-shaped bundle of vertical and horizontal sheaths bundled at a fixed height position on the ground is automatically formed, and then concrete is poured and cured, and then PC This is a construction method for a PC paving slab, characterized in that a steel material is inserted into a sheath and a prestress is introduced into the concrete by tensioning the steel material.

The apparatus of the present invention for suitably carrying out this construction method comprises a vertical sheath lifting device for lifting and holding the vertical sheath at a certain height above the ground, and one horizontal sheath on each vertical sheath. A horizontal sheath holding device that holds the device in the same position until it is bound, and a binding device that pushes the sheath binding support fitting down to the intersection of the held vertical and horizontal sheaths to bind the sheath, and the vertical sheath lifting device and the horizontal sheath holding device. And a trolley provided with a binding device and intermittently moving in the longitudinal direction of the vertical sheath every pitch of the horizontal sheath.
It is a paving plate construction device. In this device, the vertical sheath lifting device may be formed of two groove type rollers that support the vertical sheath from below and one groove type roller that presses the vertical sheath from above, and the horizontal sheath holding device is supplied from the sheath supply device. The gripping portion grips the horizontal sheath and the rotating arm that moves the gripped sheath onto the vertical sheath and presses and holds the sheath from above.

Further, the sheath tying device includes a pair of claws for holding the sheath tying support fitting, a claw operating portion for closing the pair of claws while pushing down the claws to press the sheath tying fitting to the sheath intersection, and a sheath tying device. And a carriage for receiving the metal fitting and carrying the pair of claws to the intersection of the sheaths.

[0007]

According to the method of the present invention, when the PC pavement plate is constructed,
It is possible to mechanize proper and rapid plane disposition of the sheath, bundling, and vertical positioning. Further, the apparatus of the present invention can preferably carry out the above method.

[0008]

1 is a side view of an embodiment of the apparatus of the present invention. Also showed part of the front view in FIG. The PC pavement slab constructed by this device is, for example, a post-tensioned PC pavement slab having a length of 100 m and a width of 7.5 m. This device has a wheel spacing wider than 7.5m wide,
It is collected on a trolley 10 traveling in the hand direction. Form a flat ground 1 at the place where the PC paving slab should be constructed, and trolley 1
0 is shown on this flat ground as a running path or on the ground
The wheels 11 are used as a running path on a rail that is not used . This carriage 10 on, (a) longitudinal sheath lifting device 30 for holding lifting the vertical sheath constant height (b) horizontal sheath is supplied on the vertical sheath one by one, the horizontal sheath holding device for holding a fixed position 40 (c) A sheath tying device 50 for tying the sheath tying support fittings by pushing them down from above to the intersection of the held vertical and horizontal sheaths.
Aggregated and posted. Aggregate and mount each device with various functions
And it has location, aspect sea by carriage 10 is intermittently moved for every one pitch in the lateral sheath in the longitudinal direction of the longitudinal sheath
A grid-like arrangement that secures a certain height above the ground
It is possible to mechanically automate the binding of source intersections without input
It becomes Noh. Also, a sheath that is a hollow tube made of a thin material
It is possible to carry out the above-mentioned series of construction without causing deformation or bending.
It

The vertical sheath 2 is arranged on the ground 1 with a space 25 in the width direction.
They are arranged in the longitudinal direction every 0 mm. Vertical sheath lifting device 30 for holding lifting the vertical sheath 2 to the ground constant height, grooved rollers 3 for receiving the lower surface of the vertical sheath 2
1 and 32 and a grooved roller 33 that suppresses the upper surface. When the sheath is supported by these rollers,
No bending, denting or other deformation. Lateral sheath 3
Many are loaded in the horizontal sheath storage 20 on the trolley 10, and are supplied to the horizontal sheath holding device 40 one by one by a feeder (not shown).

[0010] Side sheath holding device 40, the horizontal sheath 3 <br/> received taking carried to the vertical sheath 2 horizontal sheath and vertical sheath are temporarily held there until unity. The horizontal sheath holding device 40 includes a grip claw 41 that receives and grips the horizontal sheath 3, an arm 42, and an arm rotation drive unit 43. FIG. 3 shows the details. The arm 42 grips the horizontal sheath 3 supplied from the horizontal sheath storage with the grip claws 41 and carries it onto the vertical sheath 2. The arm 42 is rotated by drawing a circular arc 44 by the drive unit 43, and presses and holds the horizontal sheath 3 on the vertical sheath 2.
The two gripping claws 41 are openable and closable, and the lateral sheath holding device opens the gripping claws 41 to stand by, receives the supplied horizontal sheath 3, and closes the gripping claws 41 to close the lateral sheath 3. Hold it. Deformation of the sheath during this process
There is no. The bundling device 50, which will be described later, includes a vertical sheath 2 and a horizontal sheath 3.
After binding the intersection points of, the grip claws 41 are opened and the arm 42 is moved to the arc 4
Follow 4 in reverse to return to the original position.

The sheath binding device 50 is a binding support metal fitting 100.
It is composed of a gripping device 51 for gripping the device, a forward / backward moving device 52 that travels right above the horizontal sheath 3, and a vertical movement device 53 that presses the binding support metal fitting 100 from above to bind it at the intersection of the vertical and horizontal sheaths. There is. As shown in FIG. 7, a bundling support metal fitting 100 used for carrying out the present invention is a bundling tool made of an elastic plate material having an Ω shape, and a vertical groove 105 for bundling vertical and horizontal sheaths at a crossing point of vertical and horizontal sheaths intersecting with each other. It is provided with a binding portion 101 forming a groove 106, two spacers 102 standing up from the base plate 103, and a binding metal member 104 for integrally coupling the spacers 102. A large number of the bundling support fittings 100 are connected and sent on the conveyor 80.

The sheath binding device 50 is a binding support metal fitting 10.
0 to grasp 0 on the conveyor 80
And the vertical movement device 53 moves the gripping device 51. When the gripping device 51 grips the binding support fitting 100 from above, the cutter device 70 cuts the connecting portion of the binding support fitting. FIG. 4 shows this state. The right half of FIG. 4 shows a state in which the gripping claw 61 of the gripping device 51 is lowered from above to grip the binding support metal fitting 100 on the conveyor 80, and the left half of FIG. Half is a vertical movement device 7 of a cutter device 70 having a rotary cutter 71.
3 lowers the rotary cutter to the position of 72 and cuts the binding support fitting. FIG. 5 is a detailed view of the gripping device 51.
The state where 00 is held is shown. The grasping device 51 grasps the bundling support metal fitting 100 by the tip 66 of the grasping claw 61 and the leaf spring 67 provided inside, and the middle part link 64 connecting the left and right grasping claws 61 and the grasping claw. Opening / closing link 63 and coil spring 6 acting in the direction of binding the lower end of 61
9. The binding support metal fitting 100 is gently gripped by adjusting the gripping claw interval adjusting screw 65. In this state, the forward / backward movement device 52 and the vertical movement device 53 move the gripping device 51 right above the intersection of the longitudinal and transverse sheaths. The vertical sheath 2 is shown in phantom in FIG. The binding support metal fitting 100 has a lower bottom portion 103 and a spacer 102 open so that the vertical sheath can be inserted into the Ω shape. In FIG. 5, this opening is indicated by θ. Although not shown in FIG. 5, the horizontal sheath 3 is temporarily held on the vertical sheath 2 by the horizontal sheath holding device 40. Connect the lower bottom 103 of the bundling support bracket 100 to this
The spacer 102 is a vertical and horizontal sheath arranged in a grid pattern on the ground.
Hold at a constant height. In order to fulfill this function,
The light device is (a) the vertical sheath lifting device 3 on the carriage 10.
0, (b) lateral sheath holding device 40, (c) sheath bundling device
The devices 50 are integrated and placed.

In FIG. 6, the gripping device 51 pushes down the binding support metal fitting 100 from above at the intersection of the horizontal sheath 3 and the vertical sheath 2, and the horizontal sheath 3 and the vertical sheath 2 in the binding portion 101 of the binding support metal fitting. The gripping claw 61 pushes down the stem 62 by the vertical movement device, and the opening / closing link 63 closes the lower ends 66 of the left and right gripping claws 61. The lower spacer portion 102 of the binding support metal fitting 100 is integrated on the left and right by a binding metal fitting 104. Next, when the stem 62 is pulled upward, the lower end 66 of the holding claw 61 is opened leftward and rightward by the operation of the link 63 and the coil spring 69, and the binding support metal fittings are raised. Even in this process, the sheath is not deformed.

The apparatus of the present invention can perform the above-mentioned operations fully automatically by sequence control. That is, the operation of advancing the trolley 10 by one pitch of the horizontal sheath, determining the supply position of the horizontal sheath, temporarily holding, grasping the binding support metal object of the binding device, moving to the binding position, binding, returning, returning the horizontal sheath holding device. Repeat. In this way, the PC pavement sheath can be bound and positioned fully automatically.

[0015]

According to the method of the present invention, the construction of the PC paving slab can be carried out quickly and in a short period of time, and the apparatus of the present invention enables the method to be suitably carried out.

[Brief description of drawings]

FIG. 1 is a side view of an example device.

FIG. 2 is a part of a front view of the apparatus according to the embodiment.

FIG. 3 is a side view of a lateral sheath holding device.

FIG. 4 is an explanatory diagram of a sheath binding device.

FIG. 5 is a front view showing a gripping state of the sheath gripping device.

FIG. 6 is a front view showing a tightened state of the sheath gripping device.

FIG. 7 is a perspective view of a binding support fitting.

[Explanation of symbols]

 1 Ground 2 Vertical Sheath 3 Horizontal Sheath 10 Cart 20 Sheath Storage 30 Vertical Sheath Lifting Device 40 Horizontal Sheath Holding Device 50 Sheath Bundling Device 70 Cutter Device 80 Conveyor Device 100 Bundling Support Metal Fitting

Claims (2)

[Claims] 1. A flat ground on which a PC pavement slab is to be formed is formed, and long longitudinal sheaths are arranged in parallel in the longitudinal direction on the ground at regular intervals, and the vertical sheath is lifted from the ground to a constant height. , The horizontal sheath is sequentially supplied and held on the vertical sheath at a constant pitch, and the intersections of the vertical sheath and the horizontal sheath are bound together, and at the same time, the vertical positioning on the ground is performed, and the vertical sheath is positioned at a constant height position on the ground. A method of constructing a PC paving slab, which comprises automatically forming a lattice-shaped bundle of bundled vertical and horizontal sheaths, then placing concrete, and introducing prestress after curing. 2. A PC comprising the following device :
Pavement plate construction equipment. (A) Two groove-type rollers that support the vertical sheath from the bottom and the top
The vertical sheath consists of a grooved roller that is pressed from
Vertical sheath lifting device for lifting and holding at a constant height on the board (b) Grasping the horizontal sheath supplied from the sheath supply device
Move the gripping part and the gripped sheath onto the vertical sheath.
It consists of a rotating arm that holds the
Feed the books one by one onto the vertical sheath and keep them in that position until they are bundled.
Lateral sheath holding device for holding (c) A pair of claws for holding the sheath bundling support fitting and the claws.
While pressing down, close the pair of claws to support the sheath binding support
Claw operation part that crimps the sheath to the sheath intersection point, and sheath bundling support
Receive the metal fittings and push the pair of claws to the intersection point of the sheath.
Holds the sheath bundling support bracket, which consists of a mechanism for carrying
It is bound by pushing down from the top to the intersection of the vertical and horizontal sheaths
Sheath binding device (d) The vertical sheath lifting device, the horizontal sheath holding device, and the sheath
Equipped with a cable tying device and a horizontal sheath in the longitudinal direction of the vertical sheath.
A dolly that moves intermittently at each pitch.