JPS607086B2 - Fixing method of bearing device in extrusion construction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for fixing a bearing device used in an extrusion construction method for concrete bridge girders.

Conventionally, in the extrusion construction method for concrete bridge girders, as shown in Figure 1, when the bridge girder (superstructure) G- is extruded forward and installed on the pier (substructure) B, the extrusion abutment of the concrete bridge girder G is Bridge girder G manufactured in units of several meters to several meters on a manufacturing table set up behind it.
After the concrete has hardened, a hand-stretched garter A is attached to the bridge girder G, and a temporary support device C, such as a sliding member arranged on a suitable support such as a steel platform or concrete block, is attached to the pier B. Load the bridge girder G onto the thing, and the bridge girder G
Either directly, or by pulling (or pushing) the sister-in-law girder G using a push-out device D attached to the pier B, sliding it between the bridge girder G and the support base, or sending it out, such as the pier B, etc. A support base is fixed on a flat plate to make it a movable support base, and the bridge girder G is loaded onto the movable support base and is supported by a pushing device D such as a horizontal jack. Pull (or push) the table above the flat plate.
Methods such as sliding the bridge girder G and pushing it out are used.

However, these methods have a problem in the method of fixing the support device and the bridge girder G.

In other words, in any of the above-mentioned methods, after the bridge girder G reaches a predetermined position and the erection, so-called extrusion, is completed, the temporary support device C is removed and a regular support device is installed to support the bridge girder G. However, it is difficult to match the supporting device placed on the pier B with the corresponding sole plate placed on the bridge girder G during the manufacture of the bridge girder G over the entire supported device, and as a result, minute installation errors may occur. This has caused problems such as the need to perform complicated work to adjust the installation position of the support device in order to obtain the desired support function.

Various studies have been carried out to solve these problems. A hinge bearing device made up of a hinge bearing device, a sliding bearing device made up of a sliding plate or a bearing plate having a curved surface, a rubber bearing device made of rubber, or a regular bearing device that combines these are used from the beginning to support the L temporary. An attempt has been made to construct an erection method in which the official support device functions as a temporary support device during erection without using device C, and after the erection is completed, the support device is fixed as it is to exert the desired support function. It is being

However, even in this method, the combination of the bridge girder G and the support device after erection as described above, the upper foot of the support device layered on the so-called bridge pier B, and the sole plate fixed in advance to the bridge girder G is completely completed. The problem of matching remains unsolved.

The present invention was made in order to solve such problems, and in consideration of the arrangement of bearing devices generally arranged on bridges, the arrangement of the bearing devices depends on the structure of the bridge girder G, such as a so-called simple girder or a continuous girder. Although it differs depending on the horizontal structure, the basic idea is that a fixed support device with the function of only removing displacement such as inclination of the bridge girder G is installed on a specific pier B, and other piers B are equipped with a bridge girder in addition to the function of the fixed support device. A configuration is adopted in which a movable support device is provided that has the function of eliminating expansion and contraction caused by temperature changes in G.

In the present invention, the upper shoe of the movable support blind road in this configuration is pushed out in advance before the erection of the bridge girder G, and after being temporarily fixed, it is placed on the bridge pier B, and the upper shoe of the movable support and the bridge girder G The fixed sole plate is sequentially fixed from the movable support device with which the sole plate and the upper shoe match, so that the upper shoe moves together with the bridge girder G, and the upper shoe and sole plate of the fully movable support device are fixed. After that, continue to push out slightly to make the upper shoe of the Okasada support device and the sole plate fixed to the bridge girder G match and fix, and at this point, the movable support device has the upper shoe shifted toward the extrusion starting point side and is in the normal state. The present invention provides a method for fixing a support device in the extrusion construction method.

That is, it is characterized by the following m, ``口}, shisu, 〇, and ■ configuration. The upper shoe of the movable support device, which consists of an upper shoe, a lower shoe, and a movable part disposed between the upper and lower shoes to allow the inclination and expansion/contraction of the superstructure, is set in advance in the bridge thin direction with respect to the lower shoe. The movable support device is shifted toward the extrusion starting point side and is provided with a locking portion between the upper and lower shoes to restrict the relative movement of the upper and lower shoes in the direction of the bridge during construction. Fix it to each pier.

{〇' Pushing out the upper shoe in the direction of the bridge axis relative to the lower shoe of the fixed support device, which consists of an upper shoe, a lower shoe, and a movable part that is arranged between the upper and lower shoes and allows the tilting of the superstructure. The fixed support device is fixed to a predetermined pier to which the movable support device is not fixed by positioning it without shifting to the starting point side.

1) A bridge girder with a sole plate fixed in a predetermined position is pushed out through a long thin steel plate that is movable in all directions of the bridge axis on the upper surface of the upper shoe of each support device, and is positioned on the side point side. Replacement on the upper shoe of the support device 〇 The girder is moved along with the thin steel plate on each support device in all directions of the bridge axis using an extrusion device, and the upper shoe of the movable support device and the sole plate are successively aligned. At the same time, the thin steel plate and the locking portion are removed at the matching positions to fix the upper shoe and the sole plate.

(Mura) Next, push out Takaki Uchii until the upper shoe of the fixed support device and the sole plate are aligned again, and then move the upper shoe of the movable support road against the lower valley by sliding the movable part of the support device. At the same time, the thin steel plate on the fixed support device is removed to fix the upper shoe and the sole plate.

The invention will now be explained in detail in the accompanying drawings, in which embodiments thereof are shown.

1 is a movable support device placed between the pier B and the bridge girder G;
The support device 1 is composed of a lower shoe 2, an upper shoe 3, and a movable portion 4 disposed between the upper and lower shoes 3 and 2 to allow displacement such as tilting of the bridge girder G and expansion and contraction.

1' is a fixed support device disposed between the pier B and the bridge girder G, and this support device 1' supports the lower shoe 2, the upper shoe 3, and the upper and lower shoes 3, 2.
A movable part 4 is arranged between the bridge girder G and allows displacement such as inclination of the bridge girder G.
It is composed of.

5 is a sole plate fixed to the bridge girder G, and the sole plate 5 is connected to the movable support device 1 and the fixed support device 1'.
The upper shoes 3 and 3 are fixed.

6 is an anchor bolt that fixes the lower shoe 2 to the pier B, 7 is a bearing plate, and the bearing plate 7 is used for fixing the upper and lower shoes 2.
, 3 to form a movable part 4.

The upper shoe 3 has an upward recess 9 in the center of its upper surface 8, and has locking holes ID, 10 at both ends in the bridge axis direction for engagement with the sole plate 5.
However, step portions 11, 11 are provided at both ends in the direction perpendicular to the bridge axis, and cutout portions 12, 12 that engage with the lower shoe 2 are formed in the step portions 11, 11.

In addition, the notches 12, 12 are formed in the movable support device 1 to a size that can tolerate the expansion and contraction of the bridge girder G and the misalignment between the upper shoe 3 and the lower shoe 2 in the expansion and contraction direction due to installation errors of the support device 1. It is something that

Further, the lower surface 13 of the upper shoe 3 is in contact with the bearing plate 7 constituting the movable part 4 in the movable support device 1, and is integrally joined by frictional force in the fixed support device 1'. The sole plate 5 has a downward recess 14 in the center of its lower surface, which faces the upward recess 9 of the upper shoe.
However, there are locking holes 10, 1 for the upper shoe at both ends in the bridge axis direction.
Bolt holes 15, 15 are provided that match the holes 15 and 15, and a hole m7 is provided in the upper surface 16 of the hole m7, which fits the downward recess 14 and the upper surface 16, and a nut 18 is fixed to cover the hole 17. There is. 19 is a locking piece held in the downward recess 14 of the sole plate 5;
9 is screwed onto a nut 18 and supported by a mounting bolt 20 inserted into the hole 17. Then, the sole plate 5 is placed in a position where it will match the upper foot 3 of the support device that was placed on the bridge pier B' in advance during the manufacture of the bridge girder G, and the anchor bolt 21 is placed so that its lower surface is on the same plane as the girder G. , 21 or the like.

Further, the locking piece 19 is supported so as to be hugged in the downward recess 14 of the sole plate, and when the sole plate 5 and the upper shoe 3 are matched, the locking piece 14 is inserted into the upward recess 9 of the upper shoe. The mounting bolts 20, which are fitted with iron and lock the upper shoe 3 and the sole plate 5, are attached to the lower slab G of the bridge girder.
A hole 22 is provided through the hole 22, and one end protrudes from the hole 22 and is fitted with an iron. After the locking piece 19 between the two mounting bolts is inserted into the upward recess 9 of the upper shoe, Mortar M is poured into the holes 22 of the bridge girder G and is embedded and fixed.

Reference numeral 23 denotes a feeding device, and the feeding device 23 is disposed at the rear of the support devices 1 and 1' in the extrusion direction, in other words, on the extrusion starting point side.

24 is a winding device, and the winding device 24 is connected to the supporting device 1,
1' in front in the extrusion direction.

The feeding device 23 and the winding device 24 feed out a long thin steel plate 25 whose base portions are fixed to the pier B with bolts or the like, and which are movable in the bridge axis direction on the upper shoe 3 of the support device. It plays a role and a winding role.

Reference numeral 26 denotes a locking member disposed between the upper and lower shoes 2 and 3 of the movable support device 1. The locking member 26 temporarily fixes the upper shoe 3 during construction and prevents movement of the upper shoe 3 in all directions on the bridge axis. It regulates the

Extrusion of the bridge girder G and the bridge girder G and supporting devices 1, 1'
The method of fixing the suspension will be explained using a pair of combinations of the movable support device 1 and the fixed support device 1' as a representative.

That is, as shown in Fig. 3A, on one of the piers B there is installed a support device 1' with upper and lower shoes 2 and 3 arranged in a normal state.
And on the other pier B, push out the upper shoe 3 with respect to the lower shoe 2 and shift it toward the starting point side, and temporarily fix the upper shoe 3 between the upper and lower shoes 2 and 3 to restrict movement in the bridge axis direction. Locking member 26,2
The movable bearing device 1 with the
1', a winding device 24 for winding up the thin steel plate 25, and a vertical jack E for raising or lowering the bridge girder G are fixed together with the supporting devices 1, 1'. The bridge girder G to which the hand-stretched girder A is attached is loaded onto the upper thin steel plate 25, which is manufactured on a manufacturing table installed behind the abutment (see Fig. 2).

After that, the poison uses the pushing device ○ attached to the bridge girder G to slide the thin steel plate 25 on the upper shoe 3, thereby pushing the bridge girder G forward together with the thin steel plate 25 (see Figs. 4 and 4). 5), and on the empty production table, concrete is poured onto the bridge girder G pushed forward, and the bridge girder G is
Push out the bridge girder G until the sole plate 5 fixed to the upper shoe 3 of the movable support device 1 is aligned with the predetermined upper shoe 3 of the movable support device 1 (see Figure 3), and press the upper shoe 3 and the sole plate 5.
The movable support device 1 in which the
engage with. That is, the movable support device 1 has an upper shoe 3
When the sole plate 5 and the sole plate 5 are aligned, the bridge girder G is raised using a vertical jack E, and the thin steel plate 25 and upper and lower shoes are placed on the movable support box reinforcement layer 1 and supported by the feeding device 23 and the winding device 24. A locking member 26 disposed between 2 and 3 temporarily fixes the upper shoe 3 and restricts movement of the upper shoe 3 in the bridge axis direction.
is removed, and the vertical jack E is lowered directly onto the bridge girder G via the sole plate 5 onto the upper shoe 3 to load the cargo.

Then, in this state, the locking piece 19 that holds the upper shoe 3 and sole plate 5 in the downward recess 14 of the sole plate is inserted into the upward recess 14 of the upper shoe, and the mounting bolt 20 that supports the locking piece 19 is rotated. At the same time, bolts are placed in the bolt holes 15, 15 of the sole plate through the locking holes 10, 10 of the upper shoe, and screwed, thereby fixing the upper shoe 3 and the sole plate 5 together. Engage with bridge girder G.

Thereafter, the bridge girder G is moved by sliding the thin steel plate 26 on the fixed bearing device 1' on the upper shoe 3 until the predetermined sole plate 5 is aligned with the upper shoe 3 of the fixed bearing device 1'. Together with the thin steel plate 25, the upper shoe 3 and the saw
Movable support device 1 with which the plate 5 is fixed integrally
In this case, the lower surface 13 of the upper shoe 3 and the movable part 4, the so-called bearing plate 7, are slid together so that the upper shoe 3 that has been shifted toward the extrusion starting point is in a normal state, or in other words, the upper shoe 3 is returned to its normal state. 3), the fixed support device 1' where the upper shoe 3 and the sole plate 5 are aligned is raised at this position by the vertical jack E, and the feeding device 23 and the winding are placed on the fixed support device 1'. The thin steel plate 25 supported and disposed on the take-up device 24 is removed, and the bridge girder G is directly mounted on the upper shoe 3 through the sole plate by lowering a vertical jack E.

Next, the locking piece 19 that holds the upper shoe 3 and the sole plate 5 in the downward recess 14 of the sole plate is attached to the upward recess 9 of the upper shoe, and the mounting bolt 2 that supports the rear stopper piece 19 is attached.
At the same time, insert the bolts into the bolt holes 15, 15 of the sole plate through the locking hole IQ of the upper shoe.
, 10 and are screwed together, and the upper shoe 3 and sole plate 5 are fixed together to engage with the bridge girder G.

Thereafter, the pushing device D, the vertical jack E, the feeding device 23, and the winding device 24 are removed, and the holes 22 provided in the bridge girder G and fitted with the mounting bolts 20 are filled with mortar M, and the mounting bolts 20 are removed. The construction is completed by burying the
(see figure).

Note that the above-mentioned method of fixing the bearing device is based on the fixed bearing layer 1.
Although the explanation has been made based on the combination of a pair of movable bearing devices 1' and a pair of movable bearing devices 1, in actual bridges, a plurality of movable bearing devices 1 are usually used for one fixed bearing device 1'. However, during extrusion, the upper shoe 3 of the fully movable support device 1 placed on the pier B and the sole plate 5 fixed to the bridge girder G,
First, from the movable support device 1 where the upper shoe 3 and the sole plate 5 are matched, the thin steel plate 25 on the movable support device 1 and the member which is disposed between the upper and lower shoes 2 and 3 and which temporarily fixes the upper shoe 3. The operation of removing the locking member 26 and fixing the upper shoe 3 and sole plate 5 together with the locking piece 19 with bolts is performed one after another,
The upper shoe 3 of the fixed support device 1' and the sole plate 5 are fixed after the upper shoe 3 and the sole plate 5 of the movable support device 1 are all aligned and fixed.

In addition, when the above-mentioned condition occurs in the movable support device 1, the upper shoe 3, which is fixed integrally with the sole plate 5, is displaced from the lower shoe 2 by the upper shoe 3 of the fixed support device 1' and the sole plate. Even if the upper shoe 3 is not in the normal state with the upper shoe 5 aligned, and the upper shoe 3 is shifted to one side, the notches 12, 12 provided in the upper shoe 3 of the movable support device will not be placed in the lower shoe 2. In the engaged state, the bridge girder G is formed in a size that can tolerate installation errors in addition to the amount of expansion and contraction due to temperature changes, so the function of releasing the expansion and contraction of the bridge girder G is not impaired.

Further, between the upper shoes 3, 3 of the supporting devices 1, 1' and the thin steel plate 25, the bridge girder G loaded on the thin steel plate 25 is placed between the thin steel plate 25
At the same time, a sliding member (not shown) is interposed so as to smoothly slide on the upper shoe 3 and be pushed out.

Furthermore, the method of shifting the upper shoe 3 of the movable support device 1 toward the extrusion starting point side is the method of shifting the upper shoe 3 of all movable support devices arranged on the pier B by the same amount, or the method of shifting the upper shoe 3 of all the movable support devices arranged on the pier B A method is being explored in which the amount of displacement of the upper shoe 3 of the movable bearing device is regularly varied with respect to the fixed bearing device 1'. Even if an installation error occurs in the positional relationship of the movable support device 1 that is fixed to the pier B in advance, the upper shoe 3 and the sole plate 5 can be successively aligned and fixed while easily pushing out the bridge girder G regardless of the error. It is something.

The present invention has the above-mentioned configuration, and by shifting the upper shoe of the movable support device toward the extrusion starting point before erection, the bridge girder and the support device, which are erected by the extrusion construction method, can be fixed to the so-called sole plate fixed to the bridge girder. Even if there is an installation error between the upper shoes arranged on the bridge pier, regardless of the error, each upper shoe and sole plate can be easily matched one by one while pushing out the bridge girder without adjusting the position of the support device. This has the great effect of improving the efficiency of erection work.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of the extrusion construction method, Fig. 2 is an explanatory diagram of the extrusion construction method of the present invention, and Fig. 3 A, C, and C are
FIG. 4 is an explanatory diagram of the method of fixing the bearing device of the present invention, and FIG.
Figure 5 is a partially vertical side view of the fixed support device when pushing out the bridge girder, Figure 6 is a partially vertical side view of the movable support device after erection, and Figure 7 is its partially vertical front view. be. 1: Movable support device, 1': Fixed support device, 2: Lower shoe, 3
: Upper shoe, 4: Movable part, 5: Sole plate, 25: Thin steel plate, 26: Locking member. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7

Claims (1)

[Scope of Claims] 1(a) The upper shoe of a movable support device consisting of an upper shoe, a lower shoe, and a movable part disposed between the upper and lower shoes to allow the upper structure to tilt and expand/contract. A locking member is positioned to be shifted toward the extrusion start point side in the bridge axis direction with respect to the shoe, and a locking member is arranged between the upper and lower shoes to restrict relative movement of the upper and lower shoes in the bridge axis direction when added. The movable bearing device is fixed to each pier. (b) The starting point for pushing out the upper shoe in the bridge axis direction relative to the lower shoe of a fixed support device consisting of an upper shoe, a lower shoe, and a movable part arranged between the upper and lower shoes to allow tilting of the superstructure. The fixed bearing device is fixed to a defined pier to which the movable bearing device is not fixed by positioning it without shifting to the side. (c) A bridge girder with a sole plate fixed in advance at a predetermined position is extruded through a long thin steel plate arranged movably in the bridge axis direction on the upper surface of the upper shoe of each support device, and the support device is located on the starting point side. Load it onto the upper shoe. (d) The bridge girder is moved in the axial direction of the bridge along with the thin steel plates on each of the support devices by a pushing device, and the upper shoe of the movable support device and the sole plate are successively aligned, and the thin steel plates and the locking member are removed at the matched positions. Remove and fix the upper shoe and sole plate. (e) Next, push out the bridge girder until the upper shoe of the fixed support device and the sole plate match again, and bring the upper shoe of the movable support device into sliding contact with the movable part of the support device to bring it into the normal position relative to the lower shoe. At the same time, the thin steel plate on the fixed support device is removed to fix the upper shoe and the sole plate. A method for fixing a support device in an extrusion process characterized by comprising the above (a), (b), (c), (d), and (e).