JPH06240637A - Mounting method of molding frame - Google Patents

Abstract

PURPOSE:To facilitate desorption and enhance the working efficiency by spanning a wale member to each head of steel pipes arranged on a row and mounting a bottom type frame to the lower part of a hanging material which projects and suspends a hanging material to the side of the steel pipes. CONSTITUTION:Steel pipes 1 having a joint 2 are buried into a ground one after another where the joints 2 are connected with each other, thereby building up a wall surface. In this case, the cutting ends of the steel pipes 1 are oriented at the sea side while a holding material 3 is laid out thereon and one end of the hanging material 5 is bolted on and fixed with the upper end of the steel pipes 1 and it is also fixed horizontally with the holding material 3 and a post 4 on the way. The other end of the hanging material 5 is suspended by fixing a hanging material 6 with a bolt while a bottom type frame support material 7 is preliminarily mounted to the lower part of the hanging material 6. Then, a hoot iron with a nut 10 is fixed with the upper part of the joint 2 and a bottom type frame support material stopper 8 is threaded into a nut while the other end and fixed with nut on the end of a bottom frame 11 on the bottom type frame support material 7. A wall type frame 12 is installed to the sea side while a wall type frame 13 is installed on sub-slab concrete 15 on the land side and fixed with a separator at a specified span, thereby building up a buried bank with the holding material after it is cast.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for mounting a bottom formwork used for placing concrete on the upper portion of a steel pipe such as a steel pipe sheet pile type quay wall.

[0002]

2. Description of the Related Art Conventionally, when placing an upper concrete of a steel pipe sheet pile type quay, a bottom formwork has been attached by a work boat or a diver when the low tide is the highest.

[0003]

However, the conventional method has the following problems. <A> The bottom formwork was mounted at a position, for example, 50 cm above the water surface at low tide, so the time was restricted by the tide level and work efficiency was poor. <B> It took a lot of time to decide the level of the support bracket. <C> When removing the bracket, work was performed under the support work, and there was a risk of falling, and work by the diver was required. <D> The shape of the bottom formwork between the steel pipes became complicated, and because it was fixed at the site, there was a buried portion.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for mounting a bottom formwork which is used when concrete is placed on the upper portion of a steel pipe such as a steel pipe sheet pile type quay wall.

[0005]

DISCLOSURE OF THE INVENTION The present invention is a method for mounting a concrete bottom formwork, which is continuously cast on a plurality of steel pipe heads, in which the lower part of the steel pipe is buried in the ground to form a plurality of the steel pipes. Are arranged in a line, the adjacent steel pipes are connected by a joint, and a rapture member is laid so as to be continuous with each head of the steel pipe, and a suspension member using the steel pipe head and the rapture member. To the side surface of the steel pipe, suspend the suspending material at the end of the suspending material, fix the bottom formwork support material to the lower part of the suspending material, and attach the bottom formwork stopper to the joint, There is provided a method for mounting a bottom mold, characterized in that the bottom mold is held by the bottom mold support and the bottom mold stopper.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. <B> Outline of construction of steel pipe sheet pile type quay wall Multiple steel pipes 1 are arranged in a line along the coast. Adjacent steel pipes are connected to each other by a joint 2 to construct a wall surface. Usually, one of the walls faces the water on the sea side, and the other faces the land, facing the coast. Concrete is continuously cast into the head of this wall surface, that is, the heads of a plurality of steel pipes to construct a quay. The upper part of this quay can be used as a road. It is necessary to attach the formwork for pouring this concrete, especially the bottom formwork 11 to the upper part of the steel pipe. For that purpose, a bottom formwork is hung on the outer periphery of the upper part of the steel pipe, and side face formwork 12, 13 is attached so as to sandwich the steel pipe. The quay is constructed by placing concrete in the space surrounded by these forms. After pouring concrete, the used formwork can be easily removed.

<B> Steel pipe 1 Steel pipes 1 are driven in a line on the ground where a quay is to be constructed,
Adjacent steel pipes are connected to each other by a joint 2. As a result, a wall surface is formed by the steel pipe and the joint. The upper part of the steel pipe has a step and a partially cut end is provided. Arrange the steel pipe so that the cut end of the steel pipe faces the sea.

<C> Suspension Material 5 A holding material (raising material) 3 is placed on the cut end of the steel pipe 1 and connected by a tie lot to form a main body structure. As the holding material (raising material) 3, for example, upper and lower double channels or H steel is used. One end of the suspending member 5 is fastened to the upper end of the steel pipe with a stop bolt, and the suspending member 5 is agitated and supported on the upper portion of the suspending member 3 via the support column 4. Then, the other end of the suspending material extends to the side surface of the steel pipe 1. The suspending member 6 is suspended from the other end of the suspending member 5. The suspending member 6 is suspended from the suspending member 5 substantially on the side surface of the steel pipe 1. A bottom formwork support material (bracket) 7 is fixed to the lower end of the suspension material 6.
The bottom form supporting member (bracket) 7 has a horizontal bar extending in the lateral direction of the steel pipe to support the bottom form 11, and a V-shaped frame is attached to the lower part of the horizontal bar so as to support the horizontal bar. To be

<D> Bottom Form Stopper 8 A bottom form stop 8 is provided to support the bottom form support 11 (bracket) and the bottom form 11. One end of the bottom mold stopper 8 is suspended from the angle 9 and the upper portion of the joint 2 by a band iron 10 with a nut. As a fixing method, a threaded end of the bottom formwork stopper 8 is screwed into a nut fixed to the lower portion of the iron strip 10 with a nut. The other end of the bottom mold stopper 8 passes through the inside of the bottom mold 11 in the lateral direction,
Fixed at the ends.

<E> Bottom Formwork 11 The bottom formwork 11 is arranged on the bottom formwork support (bracket) 7. The bottom formwork 11 is formed in a shape along the side surfaces of the steel pipe 1 and the joint 2. This shape is formed by hermetically sealing the concrete so that it does not leak from the gap between the bottom formwork 11, the steel pipe 1 and the joint 2.

<F> Wall Formwork 12 The wall formwork 12 is disposed above the bottom formwork 11. Also,
The land-side wall formwork 13 is placed on abandoned concrete 14 provided on the ground. By pouring concrete in the space surrounded by these formwork, a concrete embankment can be constructed in the upper part of the row of the steel pipes 1.

The procedure for constructing and removing the formwork will be described below. <A> Construction of Formwork The steel pipe 1 having the joint 2 is sequentially embedded in the ground. The joints 2 of the adjacent steel pipes 1 are connected and a wall surface is constructed. Steel pipe 1
Has an upper end and a cut end step, and is embedded so that the cut end faces the sea side. A holding material (raising material) 3 is arranged on the cut end of the steel pipe 1. Hanging material 5,
One end is fixed to the upper end of the steel pipe with a bolt, and the middle is horizontally fixed by a holding member (raising member) 3 and a support column 4. Hanging material 5
At the other end, the suspending member 6 is fixed by a bolt and is suspended. A bottom formwork support member 7 is attached to the lower portion of the hanging member 6 in advance. The band iron 10 with nut is fixed to the upper part of the joint 2. The bottom formwork 11 is arranged on the bottom formwork support (bracket) 7. One end of the bottom mold stopper 8 is screwed into the nut of the iron strip 10 with a nut, and the other end is fixed with the nut at the end of the bottom mold 11. When the bottom mold 11 is arranged, the wall mold 12 is arranged on the sea side. On the land side, a wall formwork 13 is provided on discarded concrete, both wall formwork 12 and 13 are fixed at a constant interval with a separator, and concrete is placed in the formwork to hold a holding material (raising material). ) 3 is buried and a levee is constructed.

<B> Removal of Formwork The fixed parts of the separator are removed and the wall formwork 12, 13 is removed. Remove the bottom formwork stop 8 with screws. Bottom formwork support 7
While removing the (bracket) from the suspending member 6, a part of the bottom mold 11 is gradually removed. In this way, the form can be easily removed.

[0014]

According to the present invention, the following special effects can be obtained. <B> Since the suspending material is suspended from the upper portion of the steel pipe and the bottom formwork is supported by the suspending material, the bottom formwork can be easily installed on the front surface of the steel pipe. <B> Conventionally, the underlay bracket was cut under the bottom formwork at the lowest tide, but the bottom formwork is installed by bolts, so it is easy to remove and there is no need to cut the bottom. <C> Installation of bottom formwork and dismantling work is not affected by tide level,
It becomes possible to perform it during the crane work. <D> By suspending the suspending material with bolts, the height can be finely adjusted and the construction accuracy is improved. <E> Supporting work and steel bottom formwork can be bound by a chain, and can be recovered together with the removal of the supporting work, and can be diverted.

[Brief description of drawings]

FIG. 1 is a perspective view of a bottom mold on a steel pipe.

FIG. 2 is a plan view of a bottom formwork on a steel pipe.

FIG. 3 is a sectional view of the bottom form III-III on the steel pipe.

[Fig. 4] Sectional view of IV-IV of bottom formwork on steel pipe

Claims (1)

[Claims] 1. A method of mounting a concrete bottom formwork, which is continuously cast into a plurality of steel pipe heads, wherein a lower portion of the steel pipes is buried in the ground, the plurality of steel pipes are arranged in a line, and the adjacent steel pipes are arranged adjacent to each other. The steel pipes are connected by a joint, and the reentrant is spanned so as to be connected to the respective heads of the steel pipe, and the suspension member is projected to the side surface of the steel pipe by utilizing the steel pipe head and the reentrant. A suspending material is suspended at an end of the suspending material, a bottom formwork support material is fixed to a lower portion of the suspending material, a bottom formwork stopper is attached to the joint, the bottom formwork support material and the bottom A method for mounting a bottom mold, wherein the bottom mold is held by a mold stopper.