JPH062313A - Level adjustment of bearing part - Google Patents

Abstract

PURPOSE:To effectively utilize the space on base plates by flattening by removing projections on the upside of the base plates set in a level-adjusted state as well as eliminating the trouble of vertically moving the base plates that support bearing parts. CONSTITUTION:Female-screw through holes 14, 36, and 37 are provided for a base plate 13 on which a bearing part 22 such as laminated layer rubber bearing is to be placed. By turning a headless stud bolt 15 screwed with the holes 14, 36, and 37, the level of the base plate 13 is adjusted. In this case, the bolt 15 is set up not to be projected from the upside of the base plate 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a level adjusting method for a bearing mounted between a lower structure such as a bridge pier and an upper structure such as a bridge girder.

[0002]

2. Description of the Related Art Some structures such as bridges and buildings have a structure in which an upper structure such as a bridge is supported by a lower structure such as a bridge pier. Various types of bearings are used as a contact (fulcrum) mechanism between them depending on the supporting conditions of the superstructure. This bearing can be divided into, for example, a steel bearing and a rubber bearing in terms of the material used, and can be divided into a movable bearing and a fixed bearing in terms of the displacement absorbing function.

As an example of a structure using the above-mentioned bearing, a base (base plate) is installed on the upper surface (installation surface or top end) of the lower structure, the bearing is placed on the base, and the support plate is directly or on the bearing. There is a structure in which the upper structure is placed via the above. In such a structure, in order to accurately control the level (height and levelness) of the bearing, it is required to adjust the level of the upper surface of the base with high accuracy.
The present invention relates to a level adjusting method for such a bearing.

As a conventional level adjusting method of the bearing, a method of adjusting the height of the base plate by rotating a bolt screwed to the base plate, or
In the field, a method has been adopted in which a base plate having a temporary material or the like on the bottom is placed on the installation surface, the level of the upper surface is measured, the work of scraping the temporary material or the like and the above measurement are repeated to adjust the level.

[0005]

However, in the conventional method of rotating the bolt to adjust the level, the upper portion of the bolt projects from the upper surface of the base plate after installation, which makes it difficult to effectively use the space. There is a problem that it becomes difficult and the work of mounting the bearing becomes difficult. Further, in the conventional method of cutting a temporary material or the like, it is necessary to repeat the cutting work and the raising and lowering of the base plate, and there is a problem that the work therefor requires time and effort.

The present invention has been made in view of such conventional problems, and an object of the present invention is to save the labor of raising and lowering a base such as a base plate, and to project the upper surface of the base plate after installation. It is an object of the present invention to provide a support level adjusting method capable of effectively utilizing a space by keeping a flat surface without objects.

[0007]

According to a level adjusting method of a bearing according to the present invention, through holes having female threads are formed at a plurality of positions of a table on which the bearing is placed, and the table is mounted in a state in which a stud is screwed into each through hole. Aiming at the above-mentioned object by mounting on the installation surface, adjusting the level of the pedestal by adjusting the height of each stud in a range that does not project from the top surface of the pedestal, and then mounting the bearing on the pedestal. Is. According to another aspect of the present invention, in addition to the above-mentioned constitution, the above-mentioned constitution can be achieved more efficiently by adopting a constitution in which the support is a support made of laminated rubber.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of a bearing structure to which the level adjusting method according to the present invention is applied.
1) is a vertical sectional view, and FIG. 2 is a line 2 in FIGS. 1 and 3.
2 is a longitudinal sectional view taken along line -2, and FIG. 3 is a schematic exploded perspective view of a bearing structure in which the upper structure is removed from FIG. In addition,
Although this embodiment shows the case of a bridge, the present invention can be similarly applied to other structures such as buildings.

1 to 3, a box removing part 11 is formed on the upper surface of a reinforced concrete lower structure (bridge pier) 10, and an installation surface 12 is formed on the bottom surface thereof. Through-hole-shaped female screws 14 are formed by tapping or the like at predetermined plural positions of a steel base plate 13 as a stand, and a stud bolt (height adjusting bolt) 15 is screwed into each female screw 14. ing. The quadrilateral base plate 13 is formed with a plurality of screw holes 16 for mounting the bearing along two opposite sides thereof, and also for fastening a plurality of anchor bolts along the other two opposite sides. Hole 17
Are formed. On the other hand, a bottomed hole 18 for anchor bolt implantation is formed on the installation surface 12 at a position corresponding to each anchor bolt hole 17 of the base plate 13.

The base plate 13 is placed on the installation surface 12 with the studs 15 screwed into the through holes (female threads) 14. Then, the level (height and horizontality) of the base plate 13 is adjusted by adjusting the screwing depth of each stud 15 from above. FIG. 4 is a vertical cross-sectional view showing a state in which the base plate 13 is placed on the installation surface 12 and the level is adjusted. In this case, the level adjustment by the studs 15 is performed by adjusting the studs 1 screwed into the female screws 14 as shown in FIG.
5 is performed in a range in which the upper end of 5 does not protrude from the upper surface of the base plate 13. Then, as shown in FIG. 4, the level of the base plate 13 is adjusted so that the upper surface of the base plate 13 substantially coincides with the upper end surface of the box removing portion 11 and has an accurate horizontal posture. In addition, each stud 15
A well-known jig engaging portion such as a rotation (drive) groove or a square hole is formed on the upper end surface of each of the studs so that the level of each stud 15 can be adjusted from above the base plate 13 by using a jig or a tool. Has become.

When the level adjustment of the base plate 13 is completed, the anchor bolts 19 are inserted through the anchor bolt holes 17 of the base plate 13 to a predetermined depth position in the bottomed holes 18 for implanting the anchor bolts (FIG. 2). . After that, the whole space below the base plate 13, that is, the whole space between the base plate 13 and the installation surface 12 and each bottomed hole 18 for anchor bolt implantation.
The entire space of is filled with mortar (concrete) by the injection method from the peripheral gap of the base plate 13. The injection of the mortar is performed until, for example, the upper surface of the mortar substantially coincides with the upper surface of the base plate 13 (or the upper end surface of the box removing portion 11). Then, after the filled mortar is solidified, the washer 20 and the nut 21 (FIG. 2) are screwed onto the male screw of the upper end protruding portion of each anchor bolt 19.
By fastening each nut 21, the base plate 1
Fix 3 to the substructure (pier).

Next, the bearing 2 is mounted on the base plate 13.
Install 2. In this embodiment, a laminated rubber bearing is used as the bearing 22. This laminated rubber bearing 22 is
Soft rubber such as chloroprene (for example, hardness = about 60 degrees ~
(65 degrees) shearing deformation material 23 and deformation suppressing material (reinforcing material) 24 made of a steel plate or the like are alternately laminated and integrated by vulcanization adhesion or the like. 25 and the lower flange 26 are integrated by vulcanization adhesion or the like. As shown in FIG. 3, the upper flange 25 is formed with a plurality of mounting holes 27, and the lower flange 26 is also formed with a plurality of mounting holes 28.

In the bearing 22 having the above structure, the mounting holes 28 of the lower flange 26 and the screw holes 16 of the base plate 13 are fastened with bolts 29,
It is fixed on the upper surface of the base plate 13. And support 2
A support plate 30 is attached on top of the two. That is, mounting holes 31 (FIG. 3) are formed at a plurality of positions of the quadrilateral support plate 30, and these mounting holes 31
The bolts 32 are inserted into the plurality of mounting holes 27 of the upper flange 25 and the bolts 32 are fastened with the nuts 33, whereby the support plate 30 is fixed to the upper surface of the bearing 22.

An upper structure (bridge bridge) 34 made of concrete is integrally fixed to the upper surface of the support plate 30.
In the illustrated example, a plurality of reinforcing bars 35 are fixed to the upper surface of the support plate 30 by welding or the like, and by placing concrete using these reinforcing bars and a mold (not shown),
The upper structure 34 is integrally formed.

According to the embodiment described above, female screw through holes 14 are formed at a plurality of positions of the base (base plate) 13 on which the bearing 22 is mounted, and the pedestal 13 is screwed into each through hole. Is mounted on the mounting surface 12, and each stud 15 is rotated within a range that does not protrude from the upper surface of the base 13 to adjust the height and levelness of the upper surface of the base 13, and then the bearing 22 is mounted on the base 13. Since it is configured so that it can be attached, when adjusting the level of the base 13, the base 1
3 does not have to be repeatedly raised and lowered (or removed and placed), and the top surface of the base after level adjustment can be made a flat surface without protrusions such as bolt heads. The level adjustment method of the support is obtained which can reduce the labor drastically and can effectively utilize the upper surface space of the base 13.

FIG. 5 is a longitudinal sectional view corresponding to FIG. 4, showing another structural example for adjusting the level of the base (base plate) 13. In the configuration of FIG. 5, openings (through holes) 36 are formed at a plurality of predetermined positions of the base plate 13, and nuts 37 are welded below the openings 36. These nuts 37 form female threads that are screwed into the height adjusting studs 15. The level adjusting mechanism of the bearing shown in FIG. 5 is different from the embodiment of FIGS. 1 to 4 in the above points, but has substantially the same configuration in other parts, and corresponding parts are indicated by the same reference numerals. , Their detailed description is omitted. A level adjusting mechanism as shown in FIG.
That is, even with the level adjusting mechanism in which the stud bolt 15 is screwed into the female screw formed in a part of the hole that vertically penetrates the base plate 13, the same effect as in the above-described embodiment can be obtained.

In the above embodiment, the laminated rubber bearing is used as the bearing 22, but the present invention is not limited to this.
It can be similarly applied to the case of using a bearing using other mechanism, and the same effect can be obtained. Also, support 22
The present invention can be similarly applied to the case of a movable support in which any one of the upper and lower surfaces is a slide surface, and the same effect can be obtained. Further, the present invention can be carried out regardless of the number and arrangement of the bearings 22 and can also be carried out in combination with other level adjusting mechanism.

[0018]

As is apparent from the above description, according to the level adjusting method of the bearing of the present invention, through holes having female threads are formed at a plurality of positions of the base on which the bearing is placed, and the studs are screwed into the through holes. Place the stand on the installation surface in a combined state, adjust the level of the stand by adjusting the height of each stud in the range that does not project from the top surface of the stand, and then take the configuration to put the bearing on the stand, There is a support level adjustment method that can save the labor of raising and lowering the base such as the base plate, and can effectively utilize the space by keeping the upper surface of the base plate after installation as a flat surface without protrusions. Provided.

According to another aspect of the present invention, in addition to the above configuration,
Since the support is a support made of laminated rubber, it is possible to more efficiently save the work of raising and lowering the base such as the base plate, and moreover, the upper surface of the base plate after installation can be left as a flat surface without protrusions. By doing so, a level adjustment method of the bearing that can effectively utilize the space is provided.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view in the axial direction of a superstructure showing a configuration example of a bearing portion for carrying out a bearing level adjusting method according to the present invention.

FIG. 2 is a vertical cross-sectional view in the lateral direction of the upper structure of the bearing portion of FIG.

FIG. 3 is an exploded perspective view of a bearing portion of FIGS. 1 and 2.

FIG. 4 is a partial vertical cross-sectional view showing a level adjustment state of the base of the support portion of FIGS. 1 to 3;

FIG. 5 is a partial vertical cross-sectional view showing another structural example of the level adjustment state of the base of the support portion.

[Explanation of symbols]

 10 Lower Structure (Bridge Pier) 11 Box Extraction Part 12 Installation Surface 13 Units (Base Plate) 14 Female Screw 15 Implant Bolt (Height Adjusting Bolt) 17 Anchor Bolt Hole 18 Bottom Hole for Anchor Bolt Implant 19 Anchor Bolt 22 Bearing (Laminated Rubber) 23) Rubber 24 Reinforcement plate 25 Upper flange 26 Lower flange 30 Support plate 34 Superstructure (bridge bridge) 36 Opening (through hole) 37 Nut (welding nut)

Claims (2)

[Claims] 1. A through hole having female threads is formed at a plurality of positions of a table on which a bearing is mounted, and the table is placed on an installation surface in a state in which a stud bolt is screwed into each through hole, and each stud bolt projects from a top surface of the table. A level adjustment method for a support, characterized in that the level of the base is adjusted by adjusting the height within a range that is not allowed, and then the support is placed on the base. 2. The level adjusting method for a support according to claim 1, wherein the support is a support made of laminated rubber.