JPH0129921B2 - - Google Patents

Description

Detailed Description of the Invention The present invention relates to a support for a monorail girder, etc. that uses a girder member as a track and supports the end of the girder member fixedly or movably. It is an object of the present invention to provide a support that can effectively resist overturning moments while also being able to adjust its position during installation. Note that the present invention is not intended only for monorail girders, but any girder member used under the same conditions as monorail girders, regardless of whether it is a bridge or a structure, is covered by the present invention.

In general, monorail girders have a narrower girder width than general bridge girder members and have a substantially elongated rectangular cross section (or I-shaped cross section), and parallel girders are constructed independently of each other. (It is not possible to attach horizontal shafts such as diagonals between the girders.) Therefore, due to the influence of centrifugal force generated by vehicle traffic (curved parts of the girders) or wind loads, it is difficult to apply only vertical loads. The load in the horizontal direction (direction perpendicular to the bridge axis) (horizontal overturning load) acts particularly strongly, generating an overturning moment.

In order to prevent the monorail girder from overturning due to this overturning moment, conventional methods have been to use high-strength members and increase the size of the supporting devices used, and to provide engaging parts on the upper and lower shoes to prevent overturning. Measures are being taken. However, these methods were not only uneconomical but also ineffective.

For this reason, the applicant first filed the patent application No. 55-55652.
According to the No. 1, a bottomed casing is buried and fixed in a girder member with its opening facing downward, a columnar body fixed to a pier is inserted into the casing, and a bearing member is installed between the two (casing and columnar body). We have proposed a bearing that can effectively deal with overturning moments by arranging a guide member and a guide member. However, according to this, the effective cross section of the upper girder member in which the casing is buried in the girder member is reduced,
In addition to problems with strength, there are various other problems, such as difficulty in position adjustment, time and effort required to install the casing, and work to fit and insert the casing into the columnar body.

The present invention has been made in view of the above circumstances, and while inheriting the technical idea of the prior art proposed earlier, the present invention improves the prior art and smoothly reduces vertical and horizontal overturning loads acting on the monorail girder. The technical problem is to obtain a support that can support the girder and also allow the position of the girder to be adjusted during installation.

The monorail girder support of the present invention adopts the following configuration (technical means) in order to solve the above technical problem. In other words, a column-shaped upper shoe that protrudes and is fixed from the lower surface of a superstructure such as a bridge girder,
A lower shoe that has an opening at the upper end and fits and accommodates the protruding portion of the upper shoe, and a support portion that supports the vertical load and that supports the horizontal overturning load that is interposed between the upper shoe and the lower shoe. The lower shoe is placed and fixed on the upper surface of a substructure such as a bridge pier in the vertical direction of It is fixed to the lower structure by a force stop.

Since the support of the present invention has the above configuration, it exhibits the following functions and has unique effects.

In other words, the vertical load acting on the bridge girder and the horizontal load that causes an overturning moment are effectively supported by the bearing part and guide part interposed between the upper and lower shoes, and the lower and lower shoes are It is transmitted to the substructure via the support member. At this time, the horizontal load is borne by the horizontal force stop, so the means for fixing the lower shoe in the vertical direction (usually by anchor bolts).
can be downsized. The lower shoe is installed and fixed to the lower structure so as to be adjustable vertically and in the plane direction, and is then fixed by horizontal force stops, so that the position of the main support can be easily and reliably adjusted. Further, since this support is disposed between the lower surface of the bridge girder and the upper surface of the pier and is not embedded in the bridge girder, there is an advantage that the effective cross section to the bridge girder is not reduced.

The present invention adopts the following embodiments.

The bearing pressure part consists of a flange part of the upper shoe that is stretched in a direction perpendicular to the bridge axis, and a convex curved surface that is stretched in a direction perpendicular to the bridge axis from the opening end face of the lower shoe and whose axis line is along the direction perpendicular to the bridge axis. thing. With this aspect, the bearing area (line support) can be larger than that of a bearing member installed in a conventional box-shaped body, and the vertical load can be smoothly and stably transmitted to the lower structure.

The vertical fixation of the lower shoe to the undercarriage shall be carried out by anchor bolts which are movable in a plane within the space of the sheath tube embedded in the undercarriage. With this aspect, the position adjustment of the main support in the planar direction can be performed even more smoothly.

Embodiments of the present invention will be described below based on the drawings. In the figure, A indicates the bridge axis direction, and B indicates the direction perpendicular to the bridge axis.

Reference numeral 1 denotes a columnar upper shoe whose upper end is buried and fixed together with an anchor bar 2 in a superstructure G such as a bridge girder. Guide members 4 are disposed above and below the side surface in the direction perpendicular to the bridge axis to form a guide section. 1a is the bottom plate of the upper shoe.

Reference numeral 5 designates a box-shaped lower shoe into which the protrusion of the upper shoe 1 is inserted; A convex curved surface 7 is formed along the line. 5a is a bottom plate of the lower shoe 5.

8 is an inner wall of the lower shoe 5; 9 is a sealing material arranged at the upper end of the lower shoe 5 so as to surround the opening 6 and the convex curved surface 7; 10 is a plurality of sealing materials provided on the bottom surface of the lower shoe 5; The bolt holes 11 are rectangular notches provided at both ends of the bottom surface of the lower shoe 5 in the bridge axis direction.

Thus, the protruding columnar part of the upper shoe 1 is inserted through the opening 6 of the lower shoe 5, and the flange 3 and the convex curved surface 7 abut against each other in the vertical direction (that is, form a bearing pressure part), The guide member 4 and the inner wall 8 are in contact with each other at a position perpendicular to the bridge axis. In addition to the aspect in which the bearing pressure portion is constituted by the flange and the convex curved surface of the opening, it may also be constituted by a bearing pressure member interposed between the lower surface plate 1a of the upper shoe 1 and the bottom surface plate 5a of the lower shoe 5. be able to.

Reference numeral 12 denotes a support plate constituting the lower shoe support member H, which has a convex curved upper surface 12a and a flat lower surface. It is supported by its convex curved surface and placed on the base plate 13.

The base plate 13 is a lower structure B such as a bridge pier.
The notch 1 of the lower shoe is fixed at both ends of the bridge axis direction
A cylindrical pin 14 constituting a horizontal force stop I is integrally fixed and provided corresponding to position 1.
Further, on the lower surface of the base plate 13, there is an anchor frame 15 embedded in the lower structure B, and a square tube having one end fixed to the anchor frame 15 and the other end fixed to a fixing hole 16 provided in the base plate 13. A shaped or cylindrical sheath tube 17 is arranged. An anchor bolt 18 is inserted into the sheath tube 17 so that its lower end is in contact with the anchor frame 15 via a backing plate 19 and is movable within the space 17a within the sheath tube 17. It is arranged.

20 is a seat plate arranged between the base plate 13 and the support plate 12 together with the adjustment plate 21, 22 is a circular hole provided in the seat plate 20 into which the anchor bolt 18 is inserted, and 23 is a hole provided in the adjustment plate 21. The groove 24 is large enough to fit the anchor bolt 18, and is a circular hole provided in the support plate 12 into which the anchor bolt 18 is inserted. Therefore, the above-mentioned support plate 12
The lower shoe support member H is supported by the seat plate 20 and the adjustment plate 21.
is configured.

25 is a block fitted to the pin 14, 26 is a backing plate fitted into the notch 11 of the lower shoe, and 27 is a wedge-shaped gap adjusting piece fitted between the block 25 and the backing plate 26. However, the aforementioned pin 14
and block 25, patch plate 26, gap adjustment piece 27
A horizontal force stop H is constructed. Note that the backing plate 26 can be omitted as appropriate if the thickness of the notch 11 of the lower shoe is sufficiently large.

Next, a method for installing and adjusting the position of the supporting device of the above embodiment will be described.

That is, when installing this support device, the anchor frame 15 and base plate 1 are installed in advance on the lower structure B.
3 are connected with a sheath pipe 17, an anchor bolt 18 is disposed inside the sheath pipe 17, and the anchor frame 15 is embedded and fixed in the lower structure B, thereby installing the anchor frame 15. Next, the seat plate 20, adjustment plate 21, and support plate 12 are placed on the base plate 13, and the circular holes 22, 24 and the grooves 2 are inserted into the anchor bolt 18.
3 and insert and arrange.

Then, the bottom surface of the lower shoe 5 is brought into contact with the support plate 12, the bolt hole 10 is fitted into the anchor bolt 18, and the notch part 11 is aligned with the pin 14 and placed. The upper shoe 1 is inserted into the lower shoe 5 so that the guide member 4 of the upper shoe 1 contacts the inner wall 8 of the lower shoe 5 in the direction perpendicular to the bridge axis, and the flange portion 3 contacts the convex curved surface 7. Arrange them side by side.

Next, the position of the main support, in other words, the upper structure G, is adjusted and fixed as follows.

That is, the position adjustment in the plane direction (front and rear, left and right) is performed on the base plate 13, and the lower shoe 5 is adjusted on the support plate 12.
This is done by moving the seat plate 20 and the anchor bolt 18 within the space 17a in the sheath tube 17, and the position adjustment in the vertical direction (up and down) is performed between the support plate 12 and the seat plate 20. This is done by fitting the adjustment plate 21 onto the anchor bolt 18 through the slot 23 of the adjustment plate and inserting the appropriate number of adjustment plates.

After adjusting the position, the lower shoe 5 is fixed in the vertical direction by tightening the nut 28 placed on the anchor bolt 18 on the lower structure B, and a backing plate 26 is placed in the cutout 11 of the lower shoe, Furthermore, the block 25 is fitted onto the pin 14 on the base plate, and then the wedge-shaped gap adjusting piece 27 is fitted between the plate 26 and the block 25 to fix the plate in the plane direction, thereby completing the installation. It is something.

Here, the arrangement of the upper shoe 1 on the upper structure G is determined by the method of manufacturing the upper structure G, when the upper structure G is manufactured in advance in a factory, or by framing the upper structure G on the lower structure B. Depending on the case, the following embodiments are generally adopted.

That is, in the embodiment, the upper shoe 1 is integrated with the upper structure G when the upper structure G is manufactured, and the upper shoe 1 is installed together with the upper structure G on the lower shoe 5 arranged on the lower structure B. In the aspect of
The entire support structure consisting of the upper and lower shoes 1, 5 and the base plate 13 is placed on the lower structure B in advance, and integrated when the upper structure G is framed and manufactured on the upper shoe 1.

The present invention is not limited to the configuration of the embodiments described above, and various design changes can be made without departing from the basic technical idea of the present invention. That is,
The bearing pressure member is interposed between the lower surface of the lower surface plate 1a of the upper shoe 1 and the upper surface of the bottom surface plate 5a of the lower shoe 5;
The guide member 4 may be formed on the inner wall 8 of the lower shoe 5, the base plate 13 may be omitted as appropriate, and so on.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which FIG. 1 is a partial vertical cross-sectional view as seen from the direction perpendicular to the bridge axis, and FIG. 2 is a line AA in FIG. 1 seen from the direction of the bridge axis. FIG. B... Lower structure, G... Upper structure, 1... Upper shoe, 3... Flange portion, 4... Guide portion, 5... Lower shoe, 6... Opening, 7... Convex curved surface, H... ...Lower shoe support member, I...Horizontal force stop.

Claims (1)

[Scope of Claims] 1. A columnar upper shoe 1 that protrudes and is fixed from the lower surface of a superstructure G such as a bridge girder, and a lower shoe that has an opening 6 at its upper end and that fits and accommodates the protrusion of the upper shoe 1. It consists of a shoe 5, a bearing part that supports a vertical load, and a guide part 4 that supports a horizontal overturning load, which are interposed between the upper shoe 1 and the lower shoe 5, and the lower shoe 5 is arranged in the vertical direction. is mounted and fixed on the upper surface of a substructure B such as a bridge pier via a lower shoe support member H, and is fixed to the substructure B in the horizontal direction by a horizontal force stop I. Support for monorail girders, etc. 2 The bearing pressure part is a flange part 3 of the upper shoe 1 that is stretched in a direction perpendicular to the bridge axis, and abuts on the flange part 3, and is stretched in a direction perpendicular to the bridge axis from the end surface of the opening 6 of the lower shoe 5. The monorail girder support according to claim 1, comprising a convex curved surface 7 whose axis extends in a direction perpendicular to the bridge axis. 3 The vertical fixation of the lower shoe 5 to the lower structure B is as follows:
Space 1 in the sheath tube 17 embedded in the lower structure B
A support for a monorail girder, etc., according to claim 1 or 2, which is provided by an anchor bolt 18 whose movement can be adjusted in a plane direction within a range of 1a. 4. The lower shoe support member H has a support plate 12 whose upper surface is formed into a convex curved surface 12a and receives the lower surface of the lower shoe 5 by the convex curved surface 12a, an adjustment plate 21 disposed at the lower part of the support plate 12, and A support for a monorail girder or the like according to any one of claims 1 to 3, comprising a seat plate 20 disposed between the lower surface of the adjustment plate 21 and the upper surface of the lower structure B. 5 The horizontal force stop I is connected to the notch 11 of the lower shoe 5,
A pin 14 is fixed to the upper surface of the lower structure B at a position corresponding to the notch 11, a block 25 is fitted to the pin 14, and the pin 14 and the block 2 are connected to each other.
5. A support for a monorail girder, etc., according to any one of claims 1 to 4, comprising a gap adjustment piece 27 interposed between the monorail girder and the gap adjustment piece 27.