JPS6278357A - Moving type arch shaped mold frame apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a movable formwork apparatus that is applied to the construction of arch concrete in arch V4 and the like.

[Conventional technology]

BACKGROUND ART In bridge structures such as roads and railways, deterioration and damage of concrete slabs installed on bridge piers have recently become a major problem. Deterioration and damage to concrete slabs is due to the material characteristics of concrete that is strong in compression but weak in tension.Dry shrinkage and repeated moving concentrated loads cause cracks, and water that enters through these cracks promotes rusting and expansion of reinforcing bars. It is believed that the concrete is peeling off and the reinforced concrete is deteriorating further.

Therefore, in order to deal with this kind of deterioration of concrete, the V3 beam type that matches the characteristics of concrete has been studied, and concrete arch bridges, which have been forgotten for a while, have been attracting attention.

This arch bridge has an excellent structural form as a concrete structure because it becomes a compressed member throughout its cross section when dead carts are loaded.This type of A-beam prevents deterioration of the concrete and has great durability. It is certain that it will improve.

However, when constructing a concrete structure such as an arch bridge, a major problem arises in terms of its construction, especially the formwork facilities required to construct the arch-shaped concrete between the piers. As a general example of this construction, each pier is first constructed to the required height, then arch-shaped formwork is erected between the piers, concrete is poured, and the concrete is sunk. If it can be supported by vertical supports, construction can be done easily and economically.However, in actual construction, arch formwork and IT
Concrete placed between the outer formwork and the outer formwork set facing each other will be piled up sequentially from the bottom of both formworks, so at the initial stage of concrete placement, The load on the concrete formwork acts perpendicular to the formwork surface. On the other hand, the pillars that support the formwork part can support the formwork in the vertical direction because the Z angle with the arch support batts of the formwork deviates greatly from the right angle direction, but there is little support in the watery direction. It's impossible. therefore,
The arch support butter needs to have a structure that can withstand horizontal loads by providing a member in the downward direction. This necessarily results in a truss structure.

? Figure tS7 shows an example of a conventional technique in which an arch-shaped formwork is supported by a truss structure. That is, when constructing the arch-shaped formwork 2 between the piers 1.1, an arch-shaped support 5 with a truss structure is supported and assembled on the pillars 6 and the frame 7 in a manner inscribed in the formwork 2, and the formwork is mounted on it. The butterfly material 3 of the frame 2 is fixed and the weir plate/t is stretched.

[Problems that the invention seeks to solve]

In such a conventional arch formwork device, as can be seen from the above figure, the structure for supporting the arch form 2 is a single-beam structure in which a truss structure is supported from the ground by a large number of columns. It will become a large-scale construction project. Therefore, this sophisticated 7-C-shaped device requires repeated construction and dismantling of rivers for each section of funeral construction, making the construction extremely complicated and requiring a lot of labor.] Second, it requires a large amount of money and a large amount of expense. especially.

Since the 7-ch shape of arch concrete often differs from construction site to construction site, arch-shaped formwork equipment can hardly be used at pond sites, and a new one must be installed each time. , and the amount of wastage of materials increases.

The present invention has been developed in consideration of the above-mentioned problem, and eliminates the complicated work of assembling and dismantling formwork equipment for each construction section for arch concrete construction. It can be used repeatedly without any second thought, the equipment is simplified, and the shape of the arch to be constructed is fIT! /? Even if changes occur, it is possible to adapt and assemble the changes, increasing construction efficiency.
(broad cloth) can be used. Providing an arch-shaped movable formwork device (4% 1) 1, r problem, v (T 1 step to solve the problem) First invention: The movable arch-shaped formwork device is mainly Rod 11 and a pair of side rods 1
2.12 to form a daily-shaped support element 15, many of which are connected to the pin 13 at the end of the main rod 11.
At the same time, the connecting parts of the rods 12 and 12 on both sides of each support element No. 15 are connected by the secondary rod 17 to form a support A having an arch shape as a whole, and both ends of the support Δ The running legs 1' are adjustable in height and horizontal movement.
1. In addition to providing the f124, the arch-shaped formwork B was installed on the shoring A. ? It is a sign.

Furthermore, in the apparatus of the second invention, in the apparatus of the first invention, the end portion Q)], (see No. 4L4) of the form body B is constructed separately, and the parts b-, 7 [Example] Hereinafter, examples of the present invention will be described with reference to the first to fourth sections. I will explain.

In Figures 1 and 2, 1.1 is arch concrete C
The leg structure t\ is the arch support on which the arch-shaped form body B is erected.

The arch support Eno\ has side rods 12 and I on both ends of the main rod 11.
A large number of support elements 15, which are constructed in a triangular shape by having one end of each of the rods 2 pivotally connected by a pin 13 and connecting their pond ends to each other via a connecting plate 14, are connected to each other i: the main rod 11.11.
are connected by pins 13 at the ends of each supporting element 15.
．． The connecting plates 1.1.14 at the top of each of the 15 joint plates 1.1.14 are connected to each other by a sub-rod 17 shorter than the main rod 11 to form left and right half-arch half-arch frames al and az, respectively, as shown in FIG. , the main rods 11.11 at the inner ends of the arch frame structures a1 and a2 on both sides are connected by pins 18, and a tension adjusting device 19 such as a turnbuckle is attached to the connecting plate 14. By tensioning the tension rods 20 having the following structure, the entire truss structure forms an arch VI structure. and? ! At the outer end, a support leg rod 21 having a support ball 22 at the lower end is attached to the end of the main rod 11, and the outer end and the connecting plate 14 at the end are connected by an auxiliary rod 23, This support leg rod 21 has height and lateral movement, J! Traveling legs 1124 on which the i-box can move are attached via brackets 21a.

The arch supports A thus constructed are arranged in multiple rows at required intervals in the direction of the depth Jj of the arch concrete to be constructed, and each support A, ) ~ is integrally connected by connecting rods etc. as appropriate. be done. The running press 24 does not necessarily need to be provided for each shoring A.

This running leg fJL24 has a structure in which a 111 wheel 27 is attached via a lateral movement A cylinder mechanism 26 to a leg body 25 having a height adjustment mechanism using hydraulic pressure or the like. The arch support A is mounted on the rails 29 through the wheels 27 on the brackets 28 installed along the depth direction of the opposite sides of the leg structure 1. 29) - can be moved to a predetermined position, and at a predetermined construction position, the support leg rod 2 is attached to a support 30 that is detachably attached to the bracket 28.
1 support ball 22 is engaged to support the arch support l\.

The arch-shaped form body B is formed by arranging a large number of vertical butterflies 31 and horizontal butterflies 32 in an arch shape, and attaching a weir 33 to the outside thereof. To install the arch support A. This should be done by fixing it to the main rod 11 at the appropriate location. In addition, at both ends of the form body B,
Tightening bolts 36 are provided between this and the main rod 11, so that both ends of the formwork B can be largely pulled together by the force of the main rod 11.

In the present invention, the arch support A is formed by connecting a large number of triangular support elements 15 and forming a predetermined arch shape by sub-rods 17, and by forming a half-arch frame structure al.
, az are connected by pin 18, and the connected support element, J? , 15. A major feature is that there is no sub-rod 17 between them.

Since the support elements 15 are connected as structural members, the length of the arch can be freely increased or decreased depending on the number of connections, and the degree of curvature of the arch can be adjusted by simply selecting the length of the sub-rod 17 from -shi. This means that it can be determined freely. In addition, since the arch frames a1 and az are connected only by pins 18, and both ends of the arch support l\ are supported by support balls 22, tensile force is always applied to the 5 sub-rods 17 of arch support A. As a result, structural calculations can be carried out reliably, and since each member is connected by a pin, the looseness of the entire structure can be eliminated.Next, the present invention Construction using formwork equipment! 7! To explain this, the device first has a push part tM structure 1.
Between 1 and 1, sets 1'/ and 1 are set as shown.

Then, the positioning of the 1-bottom of the 9-frame device is 24 in the running leg.
The height of the legs is 25 fl? i), and lateral positioning is performed by lateral movement adjustment + f'i h"c 2
This is done by adjusting 6. Furthermore, arch concrete)
Fine adjustment to match the cloud curvature of C can be made by using the wedge kM and the thickness adjustment of the near 4 ff1ii.Once the edge frame device has been positioned, the support ball 22 at the lower end can be adjusted to the support ball 22 at the lower end. 30, arched frame body B
The outer formwork bodies (not shown) are connected by connecting bodies 41, 41, . . . , and concrete C is poured.

After the concrete C has hardened, as shown in Fig. 3, the connection between the arch formwork B and the connecting body 41 is released, the wedge plate 34 at the end of the arch support A is removed, and the tightening bolts are removed. 3
6 is tightened and the arch formwork] 3 is pulled toward the main rod 11, and this is peeled off from the concrete C. Then, after removing the support body 30 and supporting the device on the traveling caster 24, the height of the leg body 25 is lowered to lower the combined form body B and separate it from the concrete C. .

Once the formwork has been peeled off, it is pushed along the rails 29 via the wheels 27 and the formwork device is moved to the next construction position7.Then, the formwork positioning operation is performed again, and thereafter The construction process will be repeated in the same way. In addition, when traveling from the 'f2 position, use the tension rod 20
Tighten it to prevent shoring A from drooping and sagging.

Figure 4 shows an example of a pond suitable for a case where the slope of the F end of the arch concrete C is steep. The body part of the skin is constructed as a separate body, and both parts are connected with a pin. I went up to the 5th grade,
When stripping the formwork, if the wedge plates 34 and 34 located above and below the pin 37 are removed and the tightening bolts 36 are tightened, the end portion of the formwork is tilted around the pin 37, and the concrete C This results in sufficient peeling of the strands.

In addition, figure fjS5 shows an example of the connection of the pond between the arch support A and the formwork body B, and the vertical butterfly 31 of the formwork body B and the main rod 1
1 and bolt donut: (1 is connected by 8,
1. Fine adjustment of the degree of curvature of the form body B is done using this bolt donut 3.
Further, FIG. 6 shows another embodiment of the fixed traveling gear 24, in which the running gear n+1124 is connected to the upper end of the leg body 25 to the supporting leg rod 21 with a pin 39. At the same time as attaching the support leg 21
A gloss 40 whose quality can be freely adjusted is installed between the legs 25 in the direction of lateral force, and one leg 25 can be moved to the pin 39 by operating the gloss 40.
As a sleeve, it can be tilted laterally as shown by the arrow, so that the position of the heavy wheel 27 provided at the lower end of the leg 25 can be adjusted downward and laterally. 1゜ [Effect of the Invention] As explained in 1-1 below, the formwork device of the present invention forms a crown supporting element with a main rod and a pair of side rods, and a large number of them are F(i In addition to connecting the pins at the ends of the main rod, both 11
At the connecting part of the 111 rods, 19 arch supports were formed by connecting them to each other by sub-rods, and an arch frame body was attached to this, so that the formwork supports were made strong with a truss structure.

In addition to being easy to assemble and disassemble, the size of the arch can be easily selected by simply increasing or decreasing the number of connected supporting elements, and the arch curvature can be changed by simply changing the length of the secondary rod. Therefore,
It can be repeatedly applied to the construction of arch concrete of various sizes and degrees of curvature6.Furthermore, with the device of the present invention, it is possible to adjust the height and lateral movement of both ends of the arch support. Since a traveling caster is provided, it is possible to travel and move, and by operating the adjustment mechanism, the positioning of the formwork body can be easily adjusted and the formwork peeled off.
Therefore, it becomes possible to repeatedly move the equipment and repeat formwork construction, greatly reducing labor and time in formwork construction, reducing wasted materials, and enabling economical construction of arch concrete. Become.

[Brief explanation of drawings]

? Figure rrI1 is a schematic front view showing an embodiment of the present invention;
Figure 2 is the same as 1. Fig. 53 is a front view showing the state of the same formwork when it is released from ♀, Fig. 4 is a front view of the main part showing an example of the starvation of the formwork body, and Fig. 5 is a front view of the formwork body. The attachment is a front view of the main part showing an example of fltξ in the appendix, Figure 56 is a front view showing an example of the pond of the traveling caster, and Figure 7 is a front view showing the construction state using a conventional formwork device.

Claims (2)

[Claims] (1) A main rod and a pair of side rods are combined to form a triangular supporting element, and a large number of them are connected to each other by pins at the ends of the main rod, and between the connecting parts of both side rods in each supporting element. are connected by secondary rods to form a shoring structure having an arch shape as a whole, and running casters that are adjustable in height and lateral movement are provided at both ends of the shoring structure. A movable arch-shaped formwork device characterized by having a shaped formwork body attached thereto. (2) Claims characterized in that a portion of the form body near the end is formed separately, and this portion is connected to the other main body portion of the form body so as to be adjustable in tilt in the lateral direction. Mobile arch formwork apparatus according to claim 1.