JPH09296444A - Erection of reinforcement and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dispense with a high working space at the upper part of an exavation hole, by attaching lateral reinforcements taken out of a containing device of the lateral reinforcements to the periphery of vertical reinforcements in turn while inserting a plurality of vertical reinforcements at a specified position in an excavated hole. SOLUTION: A containing device 2 of lateral reinforcements is installed at the inner peripheral face of the opening end of an excavated hole 1. A guide frame 5 is arranged above a curing base 4 by supporting it by legs 51. Required number of vertical flexible reinforcements 6 drawn from a drum are inserted in the guide pipes 52 corresponding thereto respectively and inserted into the excavated hole 1 after a shape-retaining frame has been fitted. Lateral reinforcements 3 taken out of the containing device 2 are fitted to the periphery of the vertical flexible reinforcements 6 by welding or the like in parallel to the above insertion work. The lateral reinforcements 3 are urged so as to be extruded upward and hence, they can be taken out of the containing space 23 of the lateral reinforcements with a little force.

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 inserting a reinforcing bar into a hole excavated in the ground when constructing a cast-in-place pile or the like.

[0002]

2. Description of the Related Art Conventionally, in a cast-in-place pile construction method or the like, as a method of building a reinforcing bar in an excavation hole, a method of sequentially building a plurality of prefabricated reinforcing bar cages by jointing them has been used. However, with this method, one of the divided rebar cages is large, so a high work space is required above the excavation hole, and construction work is not possible in places where sufficient work space cannot be secured, such as under the road construction. Will be difficult.

Further, if the reinforcing bar cage is manufactured low, the number of joints of the reinforcing bar cage increases, so that the work efficiency deteriorates and the cost increases. Further, if the work floor is lowered to secure the working space, the groundwater level needs to be greatly lowered, which may adversely affect the surrounding environment due to the lowered groundwater level. Furthermore, it is difficult to secure a site especially in urban areas because a large area is required for manufacturing and temporarily placing the rebar cage.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and does not require a high working space above the excavation hole, and can be used at any construction site. It is an object of the present invention to provide a possible reinforcing bar installation method and installation device.

[0005]

As a means for solving the above-mentioned problems, the present invention is directed to a horizontal stirrup housing in which the lateral stirrup is housed and urged to be pushed upward on the inner peripheral surface on the opening end side of the excavation hole. A device is installed, and while inserting a plurality of flexible vertical lines at predetermined positions in the excavation hole, the horizontal lines taken out from the horizontal line storage device are sequentially attached to the periphery of these vertical line groups. To provide a method of installing a reinforcing bar.

Further, in the above-mentioned reinforcing bar erection method, there is provided a reinforcing bar erection method characterized in that the transverse bar has a ring shape or a coil shape in which one portion is cut.

Further, as the horizontal bar, a curved panel-shaped bar composed of arcuate reinforcing bars arranged in a plurality of horizontal directions and connecting reinforcing bars connecting them in the vertical direction is used, and these are arranged around the vertical bar in a cylindrical shape. Provided is a method of installing reinforcing bars, which is characterized in that a plurality of pieces are attached so as to form a shape.

Further, in the reinforcing bar installation device used in the method for installing the reinforcing bar, there is an annular bottomed horizontal reinforcement storage space between the outer cylinder and the inner cylinder, and the horizontal reinforcement storage space is provided on the upper end side. There is provided a reinforcing bar erection device having an opening for taking out a horizontal bar and a spring member for urging the horizontal bar to be pushed upward at a bottom portion in the horizontal bar storage space.

Further, in the above-mentioned reinforcing bar installation device, at the upper end of the horizontal reinforcing bar storage space of the horizontal reinforcing bar storage device, a lateral reinforcing bar portion is formed which extends from the upper end of the outer cylinder toward the inner cylinder side and abuts on the stored horizontal bar. A reinforcing bar erection device is provided.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. <B> Installation of transverse stirrer storage device First, as shown in FIGS. 1 and 3, an excavation hole 1 excavated in the ground 1
On the inner peripheral surface on the side of the open end of, the horizontal streak accommodating device 2 that stores the lateral streak and is biased to be pushed upward is installed. As shown in FIGS. 1 and 4, this device has an annular bottomed lateral streak storage space 23 between an outer cylinder 21 and an inner cylinder 22. An opening 24 for taking out the horizontal line is provided on the upper end side of the horizontal line storage space 23, and a spring member 25 for biasing the horizontal line upward is provided at the bottom of the horizontal line storage space 23. Further, at the upper end of the horizontal streak storage space 23, there is provided a horizontal streak pressing portion 26 that projects from the upper end of the outer cylinder 21 toward the inner cylinder 22 and abuts the stored horizontal streak 3.

The inner diameter of the inner cylinder 22 is formed to be substantially the same as the diameter of the excavation hole 1 so that the inner cylinder 22 does not protrude into the inner peripheral surface of the opening of the excavation hole 1 as shown in FIG. . The horizontal streak storage space 23 only needs to have a gap that allows the horizontal streak 3 to move up and down. The opening 24 for taking out the horizontal stripes is formed by the inner cylinder 2
It is conceivable that the upper end of 2 is formed by cutting out in an annular shape. A plurality of spring members 25 may be arranged in the transverse streak storage space 23, the lower end may be fixed to the bottom surface of the device, and the upper end may be fixed to the lifting ring 27.

<B> Horizontal stripes The horizontal stripes 3 are stored in a plurality of layers in the horizontal stripe storage space 23 of the horizontal stripe storage device 2. As shown in FIG.
It is possible to use a ring-shaped horizontal bar 3a, which is cut at a location, or a coil-shaped horizontal bar 3b as shown in FIG. Since the diameters of the horizontal muscles 3a and 3b can be expanded / contracted, they are stored in the horizontal muscle storage space 23 in an expanded state, and when they are taken out, they contract to the original diameter to have a diameter almost equal to the outer peripheral diameter of the vertical muscle group. If it is formed in advance, the mounting work becomes easy.

Further, as shown in FIG. 7, it is also possible to use a curved panel-shaped horizontal bar 3c composed of a plurality of arcuate reinforcing bars 31 arranged in the horizontal direction and a connecting reinforcing bar 32 connecting them vertically. As shown in FIG. 8, a plurality of panel-shaped reinforcing bars 3c are attached so as to form a cylindrical shape around the vertical reinforcing bar group.

<C> Flexible Vertical Muscle Inserting Device As shown in FIGS. 1 to 3, a ring-shaped curing base 4 is installed on the upper portion of the horizontal reinforcing device storage device 4 while being supported by a support member 41 or the like. . The curing base 4 is provided with a plurality of vertical hole insertion holes 42 corresponding to predetermined positions of the flexible reinforcing bars.
These vertical line insertion holes 42 are connected to the inner peripheral space via the slits 43. Further, the flexible vertical line inserted into the vertical line insertion hole 42 can be fixed by fitting the wedge 44 into the vertical line insertion hole 42.

A ring-shaped guide frame 5 is provided on the upper part of the curing base 4 while being supported by legs 51. This guide frame 5 is provided with a plurality of apertures (not shown) at positions corresponding to the vertical streak insertion holes 42 of the curing base 4, and these apertures have the same direction on the upper surface side of the guide frame 5. A guide tube 52 that is bent to face is attached.

In addition, although not shown, a rebar drawing device, a guide roller or the like may be used. The guide roller is formed by arranging a plurality of rollers, and the required number of flexible reinforcing bars are arranged in parallel to enter the guide roller, and the guide roller is arranged suitable for bundling while passing through the guide roller. It is for After passing through the guide roller, they are bound with a steel band or the like at a predetermined interval, and a flexible longitudinal bar 6 for building in the excavation hole 1 is manufactured.

<D> Insertion of Flexible Longitudinal Strips As shown in FIGS. 1 to 3, the flexible longitudinal strips 6 have a flexibility that allows the drum 61 to be wound up and pulled out. The required number of flexible longitudinal lines 6 drawn out from the drum 61
Are inserted into the corresponding guide tubes 52. A shape-maintaining frame 7 as shown in FIGS. 3 and 9 is attached to the tip of each flexible longitudinal bar 6 that has been pulled out to the vicinity of the curing base 4.

In this shape-maintaining frame 7, a pair of holding plates 72 are provided in the axial direction of the outer peripheral surface of the cylindrical body 71, and the flexible longitudinal bars 6 are provided.
A plurality of sets are attached at intervals such that they sandwich. Further, it is preferable to provide a spacer 73 on the outer peripheral surface of the cylindrical body 71 for ensuring a predetermined distance from the wall surface of the excavation hole 1. After attaching the shape retaining frame 7, each flexible longitudinal bar 6 is inserted into the excavation hole 1.

<E> Attaching the horizontal stripes In parallel with the insertion work of the flexible vertical stripes 6, the horizontal stripes 3 taken out from the horizontal stripe storage device 2 are attached around the flexible vertical stripes 6 by welding or the like. Since the lateral streaks 3 are biased to be pushed upward and are stored in the lateral streak storage device 2, they can be easily taken out from the lateral streak storage space 23 with a slight force.

The ring-shaped transverse lines 3a shown in FIG. 5 are attached one ring at a time. Since the coiled horizontal streaks 3b in FIG. 6 are sequentially attached from the pulled-out portion, the front and back are inverted when storing and attaching, as if the sleeves of the clothes were turned over. The panel-shaped transverse stripes 3c shown in FIGS.
The flexible longitudinal lines 6 are attached around the 6 groups so as to form a cylindrical shape.

The group of flexible longitudinal bars 6 is provided with shape retaining frames 7 at appropriate intervals as shown in FIG. 3 in accordance with the built-in length to protect the shape of the reinforcing bars. After it has been built up to the specified depth, the shape retaining frame 7 is also attached to the upper end.
2, and the upper ends of the flexible longitudinal bars 6 are fixed to the curing base 4 with the wedges 44, as shown in FIG. Then, the flexible longitudinal bar 6 is cut at the upper part of the curing base 4, and the installation of the reinforcing bar is completed. It should be noted that a pile can be constructed by placing a concrete in the excavation hole 1 by a known method.

[0022]

Since the present invention has been described above,
The following effects can be obtained. <B> By using the lateral streak accommodating device, the lateral streak mounting operation can be performed easily and smoothly in parallel with the insertion of the flexible longitudinal streaks, so that the work efficiency can be improved.

<B> A high work space is not required above the excavation hole, work can be performed at any construction site, and the versatility is excellent.

<C> Since there is no joint in the vertical line, it is possible to construct a pile that is structurally stable and highly reliable.

<D> Since it is not necessary to temporarily store a large number of rebar cages as in the conventional case, it is possible to easily secure a site even in an urban area.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a transverse stirrup storage device installed in a drill hole.

FIG. 2 is an explanatory diagram of a flexible longitudinal muscle insertion device.

FIG. 3 is an overall explanatory view of a reinforcing bar installation method of the present invention.

FIG. 4 is a perspective view of a lateral streak storage device.

FIG. 5 is an explanatory diagram of a ring-shaped transverse line.

FIG. 6 is an explanatory diagram of a coiled transverse line.

FIG. 7 is an explanatory view of a panel-like horizontal streak.

FIG. 8 is an explanatory diagram of a mounted state of a panel-shaped horizontal bar.

FIG. 9 is an explanatory diagram of a shape retaining frame.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yuko Kida 1-25-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo Taisei Corporation

Claims (6)

[Claims] 1. A horizontal stirrup storage device is installed on the inner peripheral surface of the excavation hole on the side of the open end of the excavation hole and is biased so as to store the lateral stirrup and push it upward. A method of constructing a reinforcing bar, characterized in that the horizontal bars taken out from the horizontal bar storage device are sequentially attached around the vertical bar groups while inserting the bars. 2. The method of installing a reinforcing bar according to claim 1, wherein a ring-shaped member having one cut off is used as the transverse bar. 3. The method for installing a reinforcing bar according to claim 1, wherein a coil-shaped member is used as the horizontal bar. 4. A curved panel shape comprising a reinforcing bar arranging method according to claim 1, wherein the horizontal bars include arc-shaped reinforcing bars arranged in a plurality of stages in a horizontal direction and connecting reinforcing bars connecting them in a vertical direction. The method of installing a reinforcing bar is characterized in that a plurality of them are attached to form a cylindrical shape around the vertical streak. 5. The reinforcing bar building apparatus used in the reinforcing bar building method according to claim 1, further comprising an annular bottomed horizontal bar housing space between the outer cylinder and the inner cylinder. The reinforcing bar construction has an opening for taking out the horizontal bar at the upper end side of the horizontal bar storage space, and a spring member for urging the horizontal bar upward in the bottom part of the horizontal bar storage space. Device. 6. The reinforcing bar installation device according to claim 5, wherein a horizontal bar that extends from the upper end of the outer cylinder toward the inner cylinder and abuts the stored horizontal bar at the upper end of the horizontal bar storage space of the horizontal bar storage device. An apparatus for constructing a reinforcing bar, characterized in that a pressing portion of the is formed.