JPS594755A - Slide type frame apparatus for casting concrete structure - 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 The present invention relates to a sliding formwork apparatus for pouring concrete structures.

The concrete sliding form construction method, known as the sliding form construction method, has been applied to the construction of silos, piers, caissons, chimneys, wells, tank side walls, etc. In this construction method, the inner and outer formwork is supported by a gate-shaped yoke body, and a climbing jack fixed to the yoke body climbs along the standing rod to raise the inner and outer formwork, and at the same time concrete is poured. This is to construct a concrete structure. However, since the internal water is trapped in the concrete poured between the inner and outer formwork, its initial strength is weak, and it takes time for the concrete to withstand its own weight and the formwork to rise. There were problems such as not being able to obtain a concrete structure.

The present invention has been developed in view of the above-mentioned problems.The present invention accelerates the work cycle by promoting the early dehydration of the water retained in poured concrete between the inner and outer formwork, and also provides a smooth concrete structure that is dense and strong, resulting in a homogeneous concrete structure. The purpose is to provide formwork equipment.

The present invention includes a yoke body that supports inner and outer formwork facing each other at a predetermined interval, a beam body that spans between the adjacent yoke bodies,
A clamping device is detachably fixed to an upright rod interposed between the inner and outer formwork at a predetermined position of the beam body, and a clamping device is attached at a lower end between the clamping devices adjacent to the beam body. The sliding formwork is characterized in that it consists of a concrete pressure plate that can be raised and lowered between the formworks, and a vertically installed jack. Explain.

FIG. 1 shows a sliding formwork device W for constructing a cylindrical concrete structure as an example of the present invention.

/ is a yoke body arranged at a predetermined interval, and is composed of a horizontal member and an inner and outer vertical member 3.3'. Continuous inner and outer forms 5X5' facing each other at a predetermined interval are supported inside the inner and outer vertical members 3.3' through raised members and ribs (not shown), respectively. The inner and outer formwork! , 5
′ may be provided with a large number of drainage holes (not shown) whose inner diameters are set so that the internally held water of the poured concrete B, which will be described later, can be released separately from the poured concrete B, as necessary. can. Reference numerals 7 and 7' designate workbenches that are fastened to the outsides of the inner and outer vertical members 3 and 3', respectively. The yoke body is a continuous beam body, and spans between the adjacent yoke bodies. A through hole 10 for an upright rod 9 is provided in the center of the beam g spanning between adjacent yoke bodies. A hydraulic holding device // which is detachable from the upright rod is fixed on the upper surface of the beam g in alignment with the position of the through hole io. The standing rod 9 is the inner and outer formwork! , 57, and is planted in the existing concrete IJ-)/, 2 and extends upward. Further, a hydraulic jack equipped with a telescopic piston 3 is vertically provided on the lower surface of the beam g at an intermediate portion between the adjacent clamping devices 77. At the lower end of the piston/3, there is a continuous concrete pressure plate that can be raised and lowered between the inner and outer formwork 5.3'.
S is installed. In addition, longitudinal reinforcing bars/B are placed between the inner and outer formworks, t and j', and vertical reinforcing bars supporting plates (not shown) are provided where necessary. /Left: Through holes for vertical reinforcing bars provided in the yoke body/. Also, /9 is a through hole for the upright rod provided on the left side of the concrete pressure plate.

Next, the operation of the sliding formwork device W of the present invention will be explained.

In Fig. 1, the upright rod 9, which is held in a predetermined position by the hydraulic clamping device /I by hydraulic operation, is moved upward by the piston /3 equipped with the concrete pressure plate /& by the operation of the hydraulic jack blower. When it moves, it assumes the entire load of the sliding formwork W including the clamping device//in addition to the dead weight of the concrete. Concrete pressure plate 15 and inner and outer formwork moved upward! , s′ and the upper end of the inner and outer formwork sz! Concrete B will be poured in the area surrounding r' and the existing concrete/Y. concrete 6
Immediately after pouring, the concrete pressurizing plate that moves downwards hits the 6 sides of the poured concrete by Jatsugi/4' operation, and at the same time, the poured concrete is moved against the clamping device // that clamps the erected concrete. Take force and press. In this way, the retained water of the poured concrete B is transferred to the inner and outer formworks.
, s' (not shown) and the like. Then, the poured concrete 6 is uniformly pressed as a whole, so that it is possible to obtain a solid, solid, homogeneous concrete with high initial strength at an early stage. Thereafter, the clamping of the hydraulic clamping device/l against the vertical rod is released. Then, when the poured concrete A having a predetermined initial strength is used as a reaction force through the concrete pressure plate /S and the piston /3 is extended by the operation of the hydraulic jack puffer, the left side of the inner and outer formwork
The sliding formwork W including S' moves upward by a distance corresponding to the predetermined stroke of the piston. Next, the hydraulic clamping device // clamps the standing rod by hydraulic operation, and at the same time moves the piston /3 containing the hydraulic jack /4t concrete pressure plate IS upward.

By repeating this operation, a cylindrical concrete structure is constructed in which hollow bodies of the same diameter are stacked on top and bottom.

Although the above-mentioned construction method using the sliding formwork device is described for a circular hollow cylindrical concrete structure, the device of the present invention can be used to construct cylindrical concrete structures of other shapes, such as elliptical or polygonal shapes, depending on the arrangement of the formwork, etc. Needless to say, it can also be applied to the construction of the body.

As explained above, according to the sliding formwork device according to the present invention, the clamping device clamped on the erected rod interposed between the inner and outer formworks is used as a reaction force to press the concrete poured between the inner and outer formworks. It is extremely economical and rational because it is possible to obtain dense, strong and homogeneous concrete, and because the sliding formwork device is raised quickly using the jacking by using this poured concrete as a reaction force, the work cycle can be accelerated. As a result, high-quality concrete structures can be created.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a sliding formwork device according to the present invention. W...Sliding formwork device L...Yaw body...Horizontal material 3.3'...Inner and outer vertical members! , 5'... Inner and outer formwork B... Pouring concrete 7.7'... Work bench and... Beam Body... Erecting rod //... Clamping device/Co...
・・Existing concrete /3 ・・Pi
Stone/4' 10. JATSUKI 1h-0,” concrete pressure plate patent applicant Junji Okada, agent of Obayashi Co., Ltd.

Claims (1)

[Claims] A yoke body supporting inner and outer formworks facing each other at a predetermined interval, a beam body spanning between the adjacent yoke bodies, and an intervening between the inner and outer formworks at a predetermined position of the beam body. A clamping device is removably fixed to the standing rod, and a concrete pressure plate that can be raised and lowered between the inner and outer formwork is attached to the lower end of the beam at a predetermined position between the clamping devices adjacent to the beam. A sliding formwork device for pouring concrete structures, characterized in that it consists of a jack that moves.