JP2000087353A - Earth retaining strut and positioning method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an earth retaining strut and a positioning method thereof capable of reducing artificial works to the utmost and rationalizing process of works to shorten a construction period of time. SOLUTION: An earth retaining wall strut A is so constituted that split struts 2 and 2 are connected to each other with a center bent hinge mechanism 1. A positioning method of the earth retaining wall strut is so constituted that a strut opening and closing device B is provided in the struts 2 and 2 and that it is suspended to a specific position of an earth retaining site in a state to close a hinge section H of the struts 2 and 2 by the opening and closing device B. Then, the hinge section H of the struts 2 and 2 is horizontally opened by bundling wires 21 and 22 of the strut opening and closing device B and opening and closing wires 25 with the hinge section H of the struts 2 and 2 as a supporting point and is provided between earth retaining walls 4 and 4. Then, a joint section J between the struts 2 and 2 is tightened and, at the same time, the outside ends of the struts 2 are pushed against walls 5 to connect.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a girder for use in a retaining work and a method for installing the girder.

[0002]

2. Description of the Related Art At a retaining site, a cross beam and a fired material for artificial work are separately installed on a bulge.

[0003]

However, the work of installing the girder and the fired material requires a large number of personnel and takes a lot of labor and time. For this reason, there were problems such as the lengthening of the retaining work.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to reduce erroneous work as much as possible, streamline the process and shorten the construction period, and a method of installing the beam. Is to provide.

[0005]

Means for Solving the Problems In order to achieve the above-mentioned object, a mountain retaining beam according to the present invention has a configuration in which divided beams are joined using a center-bending hinge mechanism. The method of mounting is to mount a girder opening / closing device on the girder girder, suspend the girder at a predetermined position on the girder with the hinge portion of the girder closed by the opening / closing device, and attach a slinging wire of the girder opening / closing device. With the opening and closing wire, open horizontally with the hinge of the cutting beam as a fulcrum and install it between the retaining walls, fasten the joint of the cutting beam, and bulge the outer end of the cutting beam. Pressing and joining.

[0006]

Embodiments of the present invention will be described below with reference to the drawings.

<B> Cut-off beam (FIGS. 1 to 3, FIGS. 6, 7) The cut-off beam A is a fire-integrated cut beam obtained by integrally joining a cut-off material 3 to a cut-off beam 3. To manufacture. That is, the split beams 2 and 2 of the divided H-section steel are joined using the center-bending hinge mechanism 1, and a pair of fired materials 3 and 3 are joined to the side of the cut beam 2. The tip of the fired material 3 is flush with that of the cutting beam 2. In addition, preload jack P
Is attached.

Further, the end plate 12 of the joint J of the divided beams 2 is provided with a hole 13 for joining a bolt 14.
Is open.

[0009] The piercing beam A is not limited to a piercing beam, but may be a piercing beam when the blasting material 3 is post-constructed.

<B> Middle folding hinge mechanisms 1 and 11 (FIG. 2)
3) The hinge mechanisms 1 and 11 are hinge hardware that rotates 180 degrees, and are used for the joint J of the divided beams 2 and 2 shown in FIG. That is, the hinge portion H of the hinge hardware 1, 11
Is positioned at the joint J and the bolts 15 are joined to the lower surfaces of the lower flanges 7, 7 of the cutting beams 2, 2. 16 is a nut.

Although the illustrated retaining beam A is an example of being folded in two, it may be folded in three. The hinge hardware 1,
When 11 is used for the joint J of the cutting beams 2 and 2 shown in FIG. 6, the bolt 15 is joined to the upper surface of the upper flange 6.

Pin rods 8 and 18 are inserted through hinge portions H of the hinge hardware 1 and 11, respectively. Thereby, the retaining beam A is opened and closed.

<C> Cut Beam Opening and Closing Devices B and C [Part 1] (FIGS. 1, 4 and 5) The cut beam open / close devices B and C shown in FIGS. 4 and 5 are used to open and close the cut beams 2 and 2. Wire-25 and the opening / closing wire-25
Jigs 20 and 30 for suspending, the first sling wires 21 and 31 for hanging the cut beams 2 and 2 at the hinge H, the wire 23 for suspending the first sling wires 21 and 31, and the suspending jig. Second slinging wire -22 attached to fixtures 20, 30
And a wire 24 for suspending the second slinging wire-22. In the figure, reference numerals 28 and 29 denote hooks. still,
The wires 23 and 24 may be replaced.

<D> Method of setting up the stake beam A [No. 1]
(FIGS. 1, 4) An example of a method of building a stake beam A (a fire-integrated slab beam) in which the divided slab beams 2 and 2 are joined by using a hinge hardware 1 using a slab open / close device B will be described.

The girder A is fitted with the girder opening / closing device (B or C) and the suspending jig (10a or 10b), and the girder A is hung by them. Hang it in place. At this time, the cutting beams 2 and 2 are temporarily restrained with a binding material in advance so as not to open.

Next, the pair of first
Slinging wires 21, 21 and opening / closing wires 25, 25
Then, the cutting beam A is gradually opened in an inverted V-shape with the hinge H of the beam A as a fulcrum. (Chain line and broken line in FIG. 1)

This operation can be performed by using a crane and any of the following.

(1) With the second slinging wire 22 attached to the hanging jig 20 suspended by the wire 24, the first slinging wire 21 attached to the hinge H of the cutting beam A is connected by the wire 23. Extend the cutting beam.

(2) The first beam attached to the hinge H of the cutting beam A
With the slinging wire -21 hung by the wire -23, the second slinging wire -22 attached to the hanging jig 20 is pulled up by the wire -24, and the cut beams 2, 2 are extended while receiving the load. go.

(3) The wire 23 in the above (1)
Then, while simultaneously operating the wire 24 in (2), the cutting beam is extended.

The wires 23 and 24 may be replaced with each other.

With the above operation, the cutting beam A is opened horizontally and temporarily placed on the connecting member 48.

Next, the end plates 12, 12 of the joint J of the cutting beams 2, 2 are fastened with bolts 14. (Fig. 2)

Next, the outer ends of the cut beam 2 and the fired material 3 are pressed against the bulge 5 and joined by a preload jack P mounted on the cut beam 2. In the figure, reference numeral 49 denotes an excavated ground surface.

<E> Cut beam opening / closing device D [2] (FIG. 6,
7) The girder opening / closing device D of FIG. 7 includes two sets of two girder opening / closing wires 35 and pulleys 36 along the respective wires 35.
A support plate 37 for supporting the pulley 36; and a suspending jig 40 for fixing the upper ends of the opening / closing wires 35.
A pair of fixing plates 38 for fixing the lower ends of the wires 35; a pair of slinging wires 32 for hanging the cutting beams 2 and 2 at the hinge portion H;
And a screw for suspending the suspending jig 40.
Wire 33. In the figure, reference numerals 28 and 29 denote hooks.

The wires 33 and 34 may be replaced with each other.

<F> Method of setting up stake beam A [Part 2]
(FIGS. 6 and 7) The above-mentioned girder opening / closing device D is mounted on the girder girder girder A, and the girder girder A is hung by the opening / closing device D at a predetermined position on the girder site with the hinge portion H of the girder A closed.

The girder wire 32 and the opening / closing wire 35 of the girder opening / closing device D are gradually steerably opened in a V-shape around the hinge H of the girder A as a fulcrum.

FIGS. 6A to 6D show the process in which the retaining beam A is opened horizontally from the closed state.

This operation can be performed by using a crane as follows.

(1) With the slinging wire 32 attached to the hinge H of the cutting beam A suspended by the wire 34, the sling jig 40 to which the opening / closing wire 35 is fixed is moved by the hanging wire 33. While lowering.

(2) With the slinging wire 32 attached to the hinge H of the cutting beam A suspended by the wire 33, the hanging jig 40 to which the opening / closing wire 35 is fixed is connected to the wire-3.
Move down by 4 while moving.

(3) The wire 33 in the above (1)
And lowering while simultaneously moving the wire 34 in (2).

The wires 33 and 34 may be replaced with each other.

With the above operation, the cutting beam A is opened horizontally and temporarily placed on the connecting member 48.

Next, the end plates 12, 12 of the joint portion J of the cutting beams 2, 2 are fastened with bolts 14. (Refer to FIG. 2) Next, with the preload jack P attached to the cutting beam 2,
The outer ends of the cutting beam 2 and the fired material 3 are protruded and pressed against 5 to join them.

<G> First Suspension Jigs 10a and 10b (FIGS. 2 and 3) The suspension jigs 10a and 10b are members for suspending the ridge beam A at the hinge H.

The first suspension jig 10a shown in FIG. 2 is a member that also serves as the pin rod 8, and both ends of the rod 8 protrude from the hinge H to form a hook 9. The first slinging wire 21 is attached to the hook 9 and suspended, so that the ridged beam A is folded at the hinge portion H and closed.

In place of the hanging jig 10a, a hanging jig 10b shown in FIG. A threaded pin rod 18 is inserted through the leg of the vertical member 17 and attached with a nut 16. The hanging metal 45 is fixed to the horizontal member 19 of the jig 10b, the sling wire 21 is attached to the hanging metal 45, and the hanging metal 45 is hung.

The pin rod 18 shown in FIG. 3 is a case where counter weights 44, 44 are set at both ends.
Thereby, the extension of the stake beam A can be facilitated.

<H> Second hanging jigs 20, 30, 40 (FIGS. 4, 5, 7) The hanging jigs 20, 30 shown in FIGS. 4 and 5 are horizontal members to which each wire is attached. Hanging bracket 2 at the top and bottom
6, 27 are installed by bolts or welding. A wire 25 for opening and closing the cut beam is attached to the lower hanging metal fitting, and a second slinging wire 22 is attached to the upper hanging metal fitting, respectively. Further, the upper part of the slinging wire 22 is connected to the wire through a hook 29.
Hang with 24.

A groove-shaped guide metal member 41 is attached to both sides of the suspension jig 20 of FIG. 4 by welding. It is not limited to the groove-shaped guide metal, but may be a trumpet-shaped metal.

A guide hole 43 is provided in the vertical direction of the center of the hanging jig 30 in FIG.

Further, one or two rollers are provided in pairs on both sides of the guide hole 43, and the slinging wire 31 is passed through the guide hole 43 and the roller in series. (Not shown). This further facilitates the opening / closing operation of the retaining beam A.

The first slinging wires 21 and 31 are disposed by using the guide hardware 41 and the guide holes 43 as guides, and the upper portions of the wires 21 and 31 are connected to the wire 2 via the hooks 28.
Hang by 3.

The hanging jig 40 shown in FIG. 7 has semi-annular guide hardware 42 attached to both sides by welding. Using the guide hardware 42 as a guide, the slinging wire-32, 3
2 and the upper portions of the wires 32 and 32 are hooked 29.
And is suspended by a wire 34.

[0047]

Since the present invention has been described above,
The following effects can be obtained. (1) The split beam is joined by using a center-bend hinge mechanism, and a pair of fired materials are integrally joined to the side of the cut beam. Therefore, the safety of the assembling work and the manufacturing accuracy can be improved. <B> Since the buckling beam can be easily opened and closed by the hinge mechanism, labor saving of operations such as transportation, carrying in, erection and dismantling can be achieved. (2) Hanging the hinged beam at a predetermined position at the site of the buckle by the girder opening / closing device with the hinge portion closed, and using the slinging wire of the girder opening / closing device and the opening / closing wire to hinge the girder. Opening horizontally with the part as a fulcrum, installing it between the retaining walls, fastening the joint of the cut beam, and pressing the outer end of the cut beam against the belly to join Thus, it is possible to perform construction safely and efficiently with a small number of people, in a short time, compared to the case where a large number of personnel separately install cutting beams and fire bombs on the erection site at the stake site. Become. As a result, the overall process
The management is reasonably simplified, and the construction period can be significantly reduced. <B> Since the retaining beam is closed and suspended by the opening / closing device, it is possible to reliably perform the erection work even in a narrow portion where there is an obstacle such as a buried pipe in the retaining space. <C> Since the above-mentioned method is repeatedly carried out in the construction of the ridge beam after the second step, the safety and the reliability of the work in deep underground work can be ensured.

[Brief description of the drawings]

FIG. 1 is a first view of a stake beam and its erection method according to the present invention.
Example front view

2 (a) is a partial front view of a state in which a beam is opened by a hinge mechanism, FIG. 2 (b) is a partial front view of a state in which a beam is closed by a hinge mechanism, and FIG. 2 (c) is FIG. )

3 (a) is a partial front view showing a state where a cutting beam is closed by another hinge mechanism, FIG. 3 (b) is a partial front view showing a state where a cutting beam is opened, and FIG. 3 (c) is FIG. 3 (b) Roll side view of

FIG. 4 is a perspective view of a girder opening / closing device used in the first embodiment.

FIG. 5 is a perspective view of a modified example of the girder opening and closing device used in the first embodiment.

FIG. 6 is a front view of a second embodiment of the method for installing a stake beam according to the present invention.

FIG. 7 is a perspective view of a girder opening / closing device used in a second embodiment.

Claims (5)

[Claims] 1. A ridged beam, wherein the divided beams are joined using a center-bending hinge mechanism. 2. A stake beam according to claim 1, wherein a pair of fired materials are integrally joined to a side portion of the stake beam. 3. A beam-opening / closing device is attached to the stake beam according to claim 1 or 2, and the beam-opening / closing device is used to suspend the beam at a predetermined position at a site of the mountain-retaining site with a hinge portion of the beam closed. With the slinging wire of the girder opening and closing device and the wire for opening and closing,
Opening horizontally with the hinge of the cutting beam as a fulcrum, installing it between the retaining walls, fastening the joint of the cutting beam, and pressing the outer end of the cutting beam against the belly to join it How to build a stake beam. 4. The method for constructing a stake beam according to claim 3, wherein the girder opening / closing device includes a wire for opening and closing the girder, a hanging jig for hanging the wire, and a hanger for the girder. A first slinging wire, a wire for hanging the first slinging wire, a second slinging wire attached to the hanging jig, and a wire for hanging the second slinging wire. How to build a stake beam. 5. The method of claim 3, wherein the girder opening and closing device comprises a wire and a pulley for opening and closing the girder.
Characterized by a hanging jig for fixing the wire, a sling wire for hanging the cutting beam, a wire for hanging the sling wire, and a wire for hanging the hanging jig. How to build the beam.