JPS58173204A - Apparatus for constructing bridge beam - 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] This invention uses erection girders to connect bridge girders to abutments,
This invention relates to a bridge girder construction device for suspending construction on bridge piers.

The bridge girder construction method using this equipment, which has been limited in the past, first involves building bridge abutments (/l) as shown in Figures 7 to 111tj.
A simple gate structure frame (3) consisting of a pair of stacked bent-type struts (ri) and inner struts (411 Place your hand forward on these simple gate structure frames (3).
Place the erection girder (1) connected to 7). Next, this election girder (1t) is equipped with a trolley (
For example, a bridge girder (/(7) such as a PC girder) is suspended by a suspension frame <tr equipped with a
6) After moving the structure along the upper vertical rail (//) to the predetermined installation position w, move the lifting device (tr) installed on the hanging frame (r).
) to the bearing surface (/-(,
? ) and temporarily placed it on top of the bridge girder (
10) as shown by the chain lines in Figure 2, the abutment (1) and the piers (
It is moved laterally along the width direction of A by means such as jacking, and installed at a predetermined level of support.

In this way, in the conventional bridge girder construction process, the gate structure frame (3) on which the erection girder (6) is placed is extremely simple and made by stacking Ben-F, so various types of construction are required as described below. It had the following problems. That is, firstly, the simple gate structure frame (3) is simply an erection girder (4).
In order to perform the function of placing and supporting the bridge girder (L), the bridge girder (L) was moved vertically along the girder (]) and suspended onto the abutment (1) and the bridge pier (C). In this case, complicated horizontal work must be carried out separately on the bridge abutments and piers.Secondly, since the simple gate structure frame (3) consists of four struts with stacked vents, both of these are shown in Figure 1 and As shown in Figure 2, the bridge girder (/'s girder end (tO)a) on the upper surface of the bridge abutment (1) and the bridge pier (2) must be installed at a position away from the supported part. When finishing the erection of the bridge girder (l) in a span and moving on to the erection of the next span, the simple gate structure frame (3) installed on the bridge ml!l (co) must be removed and the bridge girder erected. It has the disadvantage of having to be moved onto the end of the girder for viewing.In addition, the simple gate structure frame (3) has a small span despite its high height, so it is not stable. Therefore, strict searches (13) must be carried out in the front, back, left and right to ensure safety, and each time a transfer like the one in both groups is carried out, a search (13) must be carried out.
13) has to be replaced.

The present invention solves these problems in the conventional bridge girder construction mechanism.The present invention is designed to solve these problems in the conventional bridge girder construction mechanism. It is characterized by being installed so that it is supported by both side parts, and as a result, the erection girder itself with the bridge girder suspended can move laterally on the gate structure frame and erect the bridge girder at a predetermined supporting position. The object of the present invention is to provide an erection device that does not require relocation during movement of the erection work and can perform the erection work safely and efficiently.

Next, the present invention will be described in detail based on the embodiment shown in FIG. , (C) is the pier, (X) is the gate frame, and (k) is the erection girder 1 (to) i
i Shows PC digit. Election girder (6)
As shown in Fig. 3, the gate structure frame (Jo) to support the gate is constructed with steel columns (n) on both sides that are combined to form a gassho roof shape with the lower end widened, and is built on these columns. It consists of a beam material (tS) with a total width of about the same size as a ring of a pier (J) or an abutment (/L) as shown in the figure below. As shown in Figures 3 and 4, the lower end has a horizontal support part (Za) with seven inner flange cutouts, and this horizontal support part (/l) is attached to the abutment (1) or pier (Ko). The vertical fixing part (17) consisting of the lower web of the horizontal support g (/4) is supported upward at both ends of the abutment (1) or the pier (k). It is fixed via Aizal) (n).Inserts (19) to which the Aizal) (/I) can be screwed are buried in advance at both ends of the abutment (1) and piers (C) during construction. The column (n) can be quickly installed or removed via the eyepole (lr).

Also, the beam material (n) installed at the inner support (l) is the abutment (/
It has an effective length that is approximately the same as the frame width of 1.4i1111i1 (J), and both ends are fixed to the inner support (l#) to form a gate structure, but the middle lower part of the beam (n) An auxiliary support (20) whose length can be freely adjusted is provided between the abutment (1) and the pier (Nami-no-ue (3)).This auxiliary support (2D) is attached to the top beam It has a roller (22) hooked to the bottom 7 lunge (23) of the beam on the branch water surface (〃), and when the length is the same as the support (1), the middle of the beam (15) is installed. It is supported at any position in the section, and can be moved freely via rollers (L2) when the length is shortened.Moreover, a transverse rail (3) is installed at the top of the beam (n). At the same time, the erection girder (6) installed on this beam (/3) has a transverse bogie (
25) is provided, and the erection girder (6)
As shown in Figure DA, the 20 digits (/) are suspended from the rail (
24I) on top of the gantry (/1, pier (
It is possible to move freely laterally in the width direction of (e).

One end of the rope ( ) is connected to both sides of the cart ( ] ), and the other end of each rope is connected to both the supports ( ) via pulleys ( 27 ) provided at both ends of the beam ( n ). It is connected to the adjustment device <X> provided on the side of the
By letting out and pulling the rope (mu) by <n>, the erection girder (≦) can be moved laterally and fixed in position.

In the figure (r) is the hanging frame for hanging the 20 columns (/) from the erection girder (B), (9) is the hanging frame (1) connected to the vertical rail (ll) on the girder (6). The trolley (12) is moved along the 20 columns (
/ is a lifting device.

The bridge girder construction device according to the present invention includes one gate structure frame (30
), so that its width is approximately the same as the width of the bridge abutment and the bridge pier. It can be freely moved in the ring direction of the pier, so after the erection girder (4) moves the bridge girder (10) longitudinally above a predetermined construction part, the erection girder (
By moving the ≦) laterally on the gate frame support beam (lS), the bridge girder (/) can be easily suspended and installed at a predetermined position on the abutment or pier.

As a result, according to this device, the bridge girder is once lowered onto the abutment or pier as in the conventional construction mechanism, and then the bridge girder is moved to a predetermined position on the abutment or pier using a separate jack or other means. Erection work can be performed easily and efficiently without the need for moving work.

In addition, the gate structure frame (3) is installed so that the support columns (ll) on both sides are supported by the 1ib1m111 portion of the abutment and the pier, so the two columns are connected to each other in the horizontal axis direction on the pier (λ). It is possible to support the busy side of Tachibana of the group without any trouble. Therefore, when the erection work of the bridge girder (10) is completed by the erection girder (6) supported by the gate structure frame (3) on the 111QI (jl) shown in Fig. 5 and the work is transferred to the next span, Unlike conventional construction mechanisms, there is no need to remove the gate structure frame and replace it on the previously erected bridge girder. Just use the erection girder (≦
) has the effect of immediately starting relocation work.
In addition, as shown in the example, both side supports (
n) If the lower end is attached to the abutment or pier using the horizontal support part (16) supported on the upper surface of both sides of the abutment or pier, and the vertical fixing part (17) fixed to the end face of both sides of the abutment or pier, It is possible to reduce the shearing load acting on the fixing eye pole (1g) of the vertical fixing part (17). Furthermore, as shown in the example, by providing an auxiliary support column with rollers (2D) on the beam material (n) of the skeleton gate structure frame (3), the bridge abutment,
It is possible to accurately prevent the deflection of the middle part of the beam (tS) that has been expanded to the width of the pier, and the support is also rolled along the length of the beam (n) by the roller (20). Since the bridge can be moved freely, there will be no hindrance when carrying out the work of longitudinally sending out the bridge girder, and it has the effect of efficiently carrying out the erection work according to the situation at the work site.

[Brief explanation of the drawing]

Figure 1 is a side view showing the construction method performed using a conventional bridge girder construction mechanism, Figure 2 is a plain view of the same, 11P13
The figures are -1.〈A sectional view taken along the single layer line in Figure 1, Figure D is a front view showing an embodiment of the erection device according to the present invention, Figure S is also a side view, and Figure 1 is Figure S. FIG. In the figure, (ll 4 units, (2) : lm5Il> (jl
' flJl Gate frame frame, (*): Pent type support, (
jl: beam material, (41: erection girder, (71
: Hand-rolling machine, Italy) : Hanging frame, (91: ) Rolly, (/θ
): 411 digits, (//): Vertical rail, (/2):
Lifting device, (/, 71: Divine work, (30): Gate structure frame,
(ll): Support column, (/3): Beam material, (zg): Horizontal support section, (/7): Vertical fixing section, (tg): Eye bolt, (/q): Insert, (20): Auxiliary support column ,
()/): Beam bearing thickness, (22): Roller, (23
): 7 lunges under the beam, (2<Q: Traverse rail, (25
): Horizontal trolley, (S) two ropes, (27): Pulley,
Oj): dJj 4-section device. Patent applicant: Kawada Kogyo Co., Ltd. r, -:, (-

Claims (1)

[Scope of Claims] L In a bridge girder construction mechanism in which a bridge girder is suspended and constructed on an abutment and a bridge pier using Nirexi Shindar, supporting columns on both sides of the bridge abutment and abutment are supported by a support platform and both sides of the bridge pier. The erection girder with a bridge abutment and a gate frame frame with approximately the same width as the pier width and with the bridge girder suspended is like the gate III! A bridge girder construction device that can be moved in the width direction of the abutment and pier via a traversing truck on the beam between the supports on both sides of the trestle. 2. The gate structure frame has a machine platform, an abutment, a horizontal support part h supported on the upper surface of both sides of the pier, and a vertical fixing part melt-fixed to both sides of the pier, at the lower ends of both side supports of the gate structure frame. The girder erection device described in item 1. & An auxiliary support for the beam that can be moved in the length direction of the beam via a moving roller at the upper end and that can be adjusted in height is installed between the middle part of the beam of the gate structure frame, the abutment, and the pier. A bridge girder construction device according to claim 1.