JP2000064222A - Elevated bridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply construct an elevated bridge having large earthquake-proof strength without much labor. SOLUTION: Precast concrete pillars 3 placed with precast concrete abutment girders 4 on top are erected on a foundation 2 at suitable intervals, and prestress is applied to the foundation 2, the precast concrete pillars 3 and the precast concrete abutment girders 4 via tendons 9 so as to be integrally pressed and connected. Precast concrete girders 5 and 6 are provided between the precast concrete abutment girders 4, and the joint ends of the precast concrete girders 5 and 6 laid so as to face the step part of the precast concrete abutment girders 4 are frought into press-contact with and connected thereto via tendons 9 disposed ranging over the ends.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to high crosslinks.

[0002]

2. Description of the Related Art In a conventional viaduct, as shown in FIG. 8, a foundation 21, a pillar 22 and a beam 23 are integrally formed by a conventional method, and a girder 24, a floor plate 25 and a soundproof wall 26 are also constructed as described above. It is integrally formed by the same construction method.

[0003]

However, the above-mentioned viaduct is troublesome because it is constructed by the conventional method, and in order to increase the seismic strength, the column diameter is increased and the construction cost is high. There was a problem that it became longer.

The present invention has been made in view of the above problems, and an object thereof is to easily construct a viaduct having a large earthquake resistance strength without any trouble.

[0005]

[Means for Solving the Problems] The means for solving the above problems is the invention of claim 1 in which precast concrete columns having a precast concrete abutment beam installed on the head are erected on a foundation at appropriate intervals. The precast concrete columns and precast concrete columns and precast concrete abutments are prestressed by a tension material and integrally pressure-bonded, and precast concrete girders are installed between the precast concrete abutments, The joining end of the precast concrete girder installed facing the step is crimped and joined to the precast concrete abutment beam by a tension member arranged over them.

According to the first aspect of the present invention, the pillars, beams and girders are made of precast concrete, and these are prestressed by a tension material and pressure-bonded to each other. Easy to build without any hassle. In addition, the joint end of the precast concrete girder installed facing the precast concrete abutment was pre-stressed to the precast concrete abutment by a predetermined prestressing by the tension material arranged over these, so that a large earthquake occurred. Precast concrete girders do not fall from precast concrete abutments, even when horizontal or vertical loads are applied to the precast concrete columns.

According to a second aspect of the present invention, in the first aspect, the precast concrete abutment is formed by crimping and joining two precast concrete members with a tension member, and each precast concrete member is attached to the precast concrete column by a tension member. It is characterized in that they are crimped and joined together.

According to the second aspect of the present invention, the two precast concrete abutments are pressure-bonded to each other with the tension member to form the precast concrete abutment, so that the precast concrete abutment can be easily formed.

The invention of claim 3 is the same as claim 1 or 2
In the above, the precast concrete girder comprises a main girder installed in the central portion of the precast concrete abutment beam and side girders installed at both ends of the precast concrete abutment beam.

According to the invention of claim 3, the viaduct floor plate can be easily constructed by the main girders and the side girders. By installing a crane on the side girder, the rail can be easily installed on the floorboard of the precast concrete abutment.

The invention of claim 4 relates to claim 1, 2, 3
In any of the above, the central portion of the joint end portion of the main girder is installed in the groove in the step portion of the precast concrete abutment beam, and the both side portions of the joint end portion of the main girder are installed in the step portion through joint materials, respectively. It is characterized by that.

According to the invention of claim 4, the joint member absorbs the vibration caused by the passage of the vehicle, so that the vibration is generated by the girder,
Do not communicate to beams and columns.

The invention of claim 5 is characterized in that, in claim 2, the main girders are installed on precast concrete abutments on both sides of the precast concrete columns.

According to the fifth aspect of the present invention, one track is supported by two main girders sandwiching the PC column so that the center of the track and the center of the PC column coincide with each other, and the rails are on one side of each main girder. By being installed, it has a well-balanced structure as a whole.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a viaduct will be described in detail below with reference to the drawings. 1 to 6 show an embodiment of a railway viaduct, FIG. 1 is a vertical sectional view of an elevated railway bridge, and FIG. 2 is a transverse sectional view thereof.

The elevated railway bridge 1 includes prestressed precast concrete columns (hereinafter referred to as PC columns) 3 which are erected on a concrete foundation 2 at appropriate intervals, and the PC columns.
An abutment made of prestressed precast concrete (hereinafter referred to as a PC abutment) 4 installed on the head of the pillar 3;
A main girder 5 made of prestressed precast concrete and a side girder 6 made of prestressed precast concrete, which are bridged between the PC abutments 4, and these main girders 5
And a track slab 8 formed by casting cast-in-place concrete 7 on the side girder 6.

A PC abutment beam 4 installed on the head of the PC pillar 3
Is formed by pressure-bonding two precast concrete members (hereinafter referred to as PC members) 4a with a tension member 9 such as a PC steel wire or a PC steel rod. This crimping and joining is performed by applying a predetermined pre-stress with the tension material 9, and this is called PC crimping and joining. Also each PC
The member 4a is a tension member 9 arranged from the foundation 2 to the PC abutment beam 4, and is PC pressure-bonded to the PC column 3.
Therefore, the foundation 2, the PC pillar 3 and the PC abutment beam 4 are integrally PC crimp-bonded, and the foundation 2 is also PC crimp-bonded to the PC pile 2a.

The main girder 5 has a T-shaped cross section and is installed on the PC abutment beams 4 on both sides of the PC column 3. A track plate 10 is installed on the main girders 5, and rails 11 of the track plate 10 are installed on each main girder 5 one by one. Therefore, since one track is supported by the two main girders 5 on both sides of the PC pillar 3 so that the track center and the PC pillar center coincide with each other, and the rails 11 are installed on each main girder 5 one by one, As a balanced structure. Further, the side girders 6 are integrally formed with soundproof walls 6 a and are installed at both ends of the PC abutment beam 4. Since the crane 18 can be installed on the side girder 6, the rail 11 can be easily installed.

Further, the central portion 12a of the joint end portion 12 of the main girder 5 is fitted into the groove 14 of the step portion 12 of the PC abutment beam 4,
It is fitted through a joint material 13 such as mortar or hard rubber, and the expanded portions 12b on both sides of the main girder 5 are connected to the stepped portion 1.
5 is installed via a joint material 13 such as mortar or hard rubber. As described above, the joint end portion 12 of the main girder 5 is installed so as to face the PC abutment beam 4, and
The PC is pressure-bonded and joined by a tension member 9 arranged so as to penetrate therethrough. On the other hand, the side girder 6 is also pressure-bonded to the PC abutment beam 4 by PC in the same manner as described above. Therefore, as shown in FIG. 6, the PC abutment beam 4 is PC pressure-bonded to the PC column 3, and the main girder 5 and the side girder 6 are PC pressure-bonded to the PC abutment beam 4, respectively.

Next, a method of constructing an elevated railway bridge will be described. Since the pillars, beams and girders constituting the above elevated railway bridge are made of prestressed precast concrete, they are preliminarily brought into the site as PC pillars 3, PC members 4a, main girders 5 and side girders 6, respectively.

Next, two PC columns 3 are set up as a set on the concrete foundation 2 and temporarily fixed. Then, the PC member 4a is installed on the head of the PC pillar 3, and the tension member 9 arranged from the foundation 2 to the PC pillar 3 is inserted into the PC member 4a.

Next, the PC member 4a is connected to the PC column 3 by the PC.
The PC members 4a are bonded together by pressure bonding.
The PC abutment beam 4 is formed by C pressure bonding. As a result, a gate-type pier in which the foundation 2, the PC columns 3 and the PC abutments 4 are integrated is formed, and the piers are erected on the foundation 2 at appropriate intervals.

Next, the main girders 5 are installed on the PC abutments on both sides of the PC pillars 3, and the side girders 6 are installed on both ends of the PC abutments 4. At this time, the central portion 12a of the joining end portion 12 of the main girder 5 is installed in the groove 14 of the step portion 12, and the expansion portions 12b on both sides of the main girder 5 are installed in the step portion 15 via the joint material 13, respectively.

Next, the tension member 9 is inserted through the joint end 12 of the main girder 5 and the tension member 9 is tensioned and fixed by a predetermined tension force to fix the main girder 5 to the PC abutment beam 4. PC pressure bonding. The side girders 6 are also pressure-bonded to the PC abutment beams 4 by PC in the same manner as the main girders 5. Therefore, the main girder 5 sandwiches the PC abutment beam 4 and is PC pressure bonded to the PC abutment beam 4.

Next, the reinforcing bar 1 is attached to the upper surface of the main girder 5 and the side girders 6.
When 6 is arranged and the cast-in-place concrete 7 is cast to form the track slab 8, the elevated railway bridge 1 in which the PC pillar 3, the PC abutment beam 4 and the main girder 5 are PC crimp-bonded is constructed. . Then, the track plate 10 for installing the sleepers 17 and the rails 11 is installed on the track slab 8.

FIG. 7 shows a viaduct such as an expressway, which has the same structure as the elevated railway bridge 1 except that the track plate 10 is not provided.

[0027]

EFFECTS OF THE INVENTION The columns, beams and girders are made of precast concrete, and these are bonded by PC crimping, so that a viaduct with large seismic strength can be easily constructed without any trouble.

Since the PC abutment beam is formed by pressure-bonding the two PC members to each other by PC, the PC abutment beam can be easily formed.

The joining ends of the PC girders installed facing each other are connected to the PC bridge abutment by the tension material arranged over them.
Since it is crimp-bonded, the PC girder will be connected to the PC column even if a horizontal or vertical load is applied to the PC column due to a large earthquake.
Do not fall from the abutment.

A viaduct floorboard can be easily constructed by the main girders and the side girders. Further, by installing the crane on the side girder, the rail can be easily installed on the floor board.

Since the joint material absorbs the vibration caused by the passage of the vehicle, the vibration can be prevented from being transmitted to the girder, the beam and the column.

Since one track is supported by two main girders sandwiching a PC column so that the track center and the PC column center coincide with each other, and one rail is installed on each main girder, as a whole, It has a balanced structure.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an elevated railway bridge.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a plan view in which a girder material is installed on a PC abutment beam.

FIG. 4 is a plan view in which PC columns are erected.

FIG. 5 is a cross-sectional view of an elevated railway bridge.

FIG. 6 is a vertical cross-sectional view of an elevated railway bridge.

FIG. 7 is a cross-sectional view of a viaduct.

FIG. 8 is a cross-sectional view of a conventional elevated railway bridge.

[Explanation of symbols]

1 elevated railway bridge 2 foundation 3 PC pillar 4 PC bridge beams 5 main girders 6 side girder 7 Cast-in-place concrete 8 orbit slabs 9 Tension material 10 Track plate 11 rails 12 junction end 13 joint materials 14 groove 15 steps 16 Reinforcing bar 17 sleepers 18 cranes

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[Procedure amendment]

[Submission date] June 11, 1999 (1999.6.1
1)

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0005

[Correction method] Change

[Correction content]

[0005]

[Means for Solving the Problems] The means for solving the above problems is the invention of claim 1 in which precast concrete columns having a precast concrete abutment beam installed on the head are erected on a foundation at appropriate intervals. The precast concrete columns and precast concrete columns and precast concrete abutments are prestressed by a tension material and integrally pressure-bonded together, and between the precast concrete abutments and main girders of precast concrete and side girders of precast concrete. Is installed, and the joint end of the main girder is
The central part should be on the step of the precast concrete abutment.
Of the precast concrete abutment
The joint end of the main girder installed facing the step is
It is characterized in that it is crimp-bonded to the precast concrete abutment beam by means of a tension material arranged so as to penetrate through the reinforced concrete abutment beam.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction content]

The invention of claim 3 is the same as that of claim 1
The main girder is precast on both sides of the precast concrete column.
It is characterized by being installed on a concrete bridge bridge.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

According to the invention of claim 3, one track is a PC column.
The center of the track and the center of the PC column are supported by two main girders sandwiching
And the rails are installed on each main girder.
A well-balanced structure by being placed
become.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Delete

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Delete

[Procedure Amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Delete

[Procedure Amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Delete

[Procedure Amendment 9]

[Document name to be amended] Statement

[Correction target item name] 0019

[Correction method] Change

[Correction content]

The central portion 12a of the joint end 12 of the main girder 5 is fitted into the groove 14 of the step portion 15 of the PC abutment beam 4,
It is fitted through a joint material 13 such as mortar or hard rubber, and the expanded portions 12b on both sides of the main girder 5 are connected to the stepped portion 1.
5 is installed via a joint material 13 such as mortar or hard rubber. As described above, the joint end portion 12 of the main girder 5 is installed so as to face the PC abutment beam 4, and
The PC is pressure-bonded and joined by a tension member 9 arranged so as to penetrate therethrough. On the other hand, the side girder 6 is also pressure-bonded to the PC abutment beam 4 by PC in the same manner as described above. Therefore, as shown in FIG. 6, the PC abutment beam 4 is PC pressure-bonded to the PC pillar 3, and the main girder 5 and the side girder 6 are PC pressure-bonded to the PC abutment beam 4, respectively.

[Procedure Amendment 10]

[Document name to be amended] Statement

[Name of item to be corrected] 0023

[Correction method] Change

[Correction content]

Next, the main girders 5 are installed on the PC abutments on both sides of the PC pillars 3, and the side girders 6 are installed on both ends of the PC abutments 4. At this time, the central portion 12a of the joining end portion 12 of the main girder 5 is installed in the groove 14 of the step portion 15 , and the expansion portions 12b on both sides of the main girder 5 are installed in the step portion 15 via the joint material 13, respectively.

[Procedure Amendment 11]

[Document name to be amended] Statement

[Name of item to be corrected] 0025

[Correction method] Change

[Correction content]

Next, reinforcement bars are provided on the upper surfaces of the main girders 5 and the side girders 6.
When the cast-in-place concrete 7 is placed and the track slab 8 is formed by arranging (not shown) , the PC pillar 3, the PC abutment beam 4, and the main girder 5 are PC crimp-bonded to the elevated railway bridge 1 Is built. Then, installing the track plate 10 to install the rails 11 on the track slab 8.

[Procedure Amendment 12]

[Document name to be amended] Statement

[Correction target item name] Explanation of code

[Correction method] Change

[Correction content]

[Explanation of code] 1 elevated railway bridge 2 foundation 3 PC pillar 4 PC abutment beam 5 main girder 6 side girder 7 side cast concrete 8 track slab 9 tension material 10 raceway plate 11 rail 12 joint end 13 joint material 14 groove 15 steps part 1 8 crane

Claims (5)

[Claims] 1. A precast concrete column having a precast concrete abutment installed on the head is erected at an appropriate interval on a foundation, and the foundation, the precast concrete column, and the precast concrete abutment are prestressed by a tension material. The precast concrete girders are erected between the precast concrete abutments, and the joint ends of the precast concrete girders that are installed to face the steps of the precast concrete abutments are arranged across them. A viaduct characterized by being crimp-bonded to a precast concrete abutment beam by the tensioned material. 2. The precast concrete abutment beam is formed by crimping and joining two precast concrete members with a tendon, and each precast concrete member is crimped and joined to a precast concrete column with a tendon. The high bridge according to claim 1. 3. The precast concrete girder comprises a main girder installed at the center of the precast concrete abutment beam and side girders installed at both ends of the precast concrete abutment beam. Or the high bridge described in 2. 4. The central portion of the joint end portion of the main girder is
In the groove in the step of the precast concrete abutment,
2. Both sides of the main girder at the joint end are installed on the stepped portion through joint materials, respectively.
The high bridge according to any one of 2 and 3. 5. The viaduct according to claim 3, wherein the main girders are installed on precast concrete abutments on both sides of the precast concrete columns.