KR20140099586A

KR20140099586A - Construction Method of Genuine Continuous Bridge with P.S.C Beams

Info

Publication number: KR20140099586A
Application number: KR1020130012139A
Authority: KR
Inventors: 김대인
Original assignee: 김대인
Priority date: 2013-02-04
Filing date: 2013-02-04
Publication date: 2014-08-13

Abstract

SUMMARY OF THE INVENTION The present invention has been developed to solve all the problems of the prior art, and it is an object of the present invention to provide a PSC beam bridge in a continuous block (two beams continuous or three beams continuous in the throttle direction) In order to minimize the difference in structural characteristics between the pre-stressing state and the pre-stressing state of the first and second regions in FIG. 1, as shown in FIGS. 3, 4, and 5 A compression transmission pad 6 is inserted into the space between the lower and upper PSC beams 1 and 2 and the cross beam 4 is inserted into both sides of the PSC beam 1 in the throttle direction The threaded bolt 4-2 is inserted into the through hole 4-1 of the standard PSC beam 1-1 and the bolt is fastened by the washer 4-3 and the nut 4-4, ), The cross beam (4) and the bridge top plate are compressed in the direction of the throttle, so that the entire bridge is kept in the pre-stressing state in the continuous school, and the PSC Bea m) upper structure of the bridge, and a continuous continuous construction method of the incomplete continuous portion.
Structural Behavior after Completion of Sequencing Work
Cross-beams and bridges in section 2 of Figure 2 are introduced with compressive stress in the direction of the throttling so that the cross beams due to the substantial moment of the secondary fixed static loads and the tensile stresses generated on the bridge decks are eliminated, Will be healed. In addition, since the reinforcement of resistance strength against live load is increased, smooth continuous behavior of the bridge is achieved.

Description

{Construction Method of Genuine Continuous Bridge with P.S.C Beams}, P.S.C Beam Bridge,

More particularly, the present invention relates to a construction method of a PSC beam bridge, and more particularly, to a method of constructing a PSC beam by using two PSC beams or three PSC beams as one block in a bridge throttle direction. In this block, a beam and a beam are introduced into each beam as in the first section of FIG. 1. Pre-stressing is introduced in each beam, Pre-stressing break occurs due to cracks as shown in Zone 2, and it behaves as an incomplete continuous structure, which prevents frequent problems such as deck slab cracking and breakage of the calibration device. The present invention also relates to a construction method for constructing a continuous continuous bridge by adding continuity of pre-stressing to each connection portion of the beam.

In general, the P.S.C beam bridge is widely used as a bridge type with a high frequency of application in Korea,

The beam-to-beam and beam-connecting portions of the PSC beam bridge are preliminarily stressed by placing a cross beam 4 in the lateral direction as shown in Figs. 1 and 2, (3) Reinforced concrete is laid to complete the bridge. The beams were connected by reinforced concrete piling. However, in the continuous structure that behaves as an integral structure, the beam portion and the connecting portion-2 of Section-2 have insufficient rigidity and their characteristics are very different, so that the continuous bridge is advantageous. This is an incomplete continuum due to the inability to distribute and transmit the static and negative moments of bending. This is a problem that occurs frequently due to the aforementioned "crack deck slab cracking and breakage of the calibration device".

The cost of bridge maintenance due to this, as well as the social cost due to the restriction of vehicle traffic, is a big national loss considering the number of bridges.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a continuous block of a PSC beam bridge (two beam continuous or three beams in the throttling direction) In order to minimize the difference in structural characteristics between the pre-stressing state of the region 1 in FIG. 1 and the pre-stressing state of the region 2 in the region 2, 5, a compression transmission pad 6 is sandwiched between the lower portions of the front and rear PSC beams 1 and 2 and the cross beam 4 is provided with a PSC beam 1 Insert the threaded bolt (4-2) into the through hole (4-1) of the required standard in symmetry on both sides and tighten the bolt with the washer (4-3) and nut (4-4) The beam (PSC beam) 1, the cross beam 4, and the bridge top plate are subjected to compressive stress in the direction of the throttling, and the entire bridge is subjected to pre-stress to achieve a perfect continuity of the upper structure incomplete continuous portion of the PSC beam bridge.

However, the object of the present invention is not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, there is provided a continuous continuous method of incomplete continuous portion of upper structure of a PSC beam bridge according to the present invention;

In the construction method,

When constructing an existing bridge, it is necessary to first drill the through hole (4-1) by using a machine on the cross beam. In this case, the position of the reinforcing bar is determined by the reinforcing bar probe So as to avoid the damage of the reinforcing bars in the cross beam.

Cross beam for new bridges (4) Casing for cross beam penetration tools for concrete construction is installed in the cross beam formwork, and the work is carried out after completion of the bridge structure.

The sequencing operation is first

The compression transfer pad (6) of an incompressible and rigid material (eg steel cast) is sandwiched between the lower and upper cracks of the front and rear P.S.C beams, which are bound by a cross beam.

The sequencing operation is the second

Insert the specified threaded bolt 4-2 into the prepared through hole 4-1 through the precise analysis of the required standard and the amount of straining and measure the bolt 4-2 with the washer 4-3 and the nut 4-4, The PSC beam (1), the cross beam (4), and the bridge top plate are subjected to compressive stress in the direction of the throttling, and the entire bridge is maintained in a pre-stressing state in the continuous bridge, Beam (PSC Beam) The complete construction of the incomplete continuous part of the bridge top structure consists largely of two steps: a cross beam through hole preparation step and a continuous stressing step.

As described above, in the continuous block of the PSC beam bridge according to the present invention (two consecutive beams or three consecutive beams in the throttle direction) In order to minimize the difference in the structural characteristics between the pre-stressing state and the pre-stressing state, the PSC beam (1) before and after the phase as shown in FIGS. 3, 4 and 5, And a through hole 4-1 of the required standard is placed on both sides of the cross beam 4 in the throttling direction with the compression transmission pad 6 placed on the lower portion of the cross beam 4, 4-2) and tighten the bolts with washers (4-3) and nuts (4-4) so that the PSC beam (1), cross beam (4) The entire bridge is maintained in the pre-stressing state in the continuous bridge, so that the upper structure of the PSC beam bridge is completely continuous of the incomplete continuous portion, People and has the effect of reducing maintenance costs.

In particular, the present invention can be widely applied not only to new bridges but also existing bridges in use, thereby maximizing current bridge maintenance cost, manpower, and usability, thereby reducing national costs.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing a general PSC beam cross-
2 shows a cross-beam front view of a typical PSC beam cross-
3 is a side view showing a cross beam which is subjected to a continuous operation,
Fig. 4 is a front view showing a cross beam which is subjected to a continuous operation, Fig.
Fig. 5 is a view showing the injection of a material during continuous operation,
6 replaces the quasi-equipments 5-1, 5-2 of the beam 1 and the beam 2 with one quasi-

Hereinafter, a preferred embodiment of a complete continuous method of the incomplete continuous portion of the upper structure of the PSC beam bridge according to the present invention will be described. In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

FIG. 3 is a schematic side view of a completely continuous method of superstructure incomplete continuous portion of a PSC beam bridge according to the present invention.

FIG. 4 is a schematic front view of a continuous operation performed by the construction method according to the present invention. FIG. (4-2) (4-3) (4-4) are shown in the cross beam, and as far as possible, the pisse beam (1,2) side And it is structurally efficient to place it as close as possible to the bridge top plate 3 as much as possible.

FIG. 5 is a view showing a state of a material input for a continuous operation performed by the construction method according to the present invention.

Specifically,

Preparing the crossbeam through-hole for first sequencing

When constructing existing bridges, it is necessary to first drill through holes (4-1) by using a perforating machine on the cross beam. In this case, the location of the reinforcement And the drilling operation is performed avoiding the damage of the reinforcing bars in the cross beam.

Cross beams in new bridges (4) Casing for cross beam penetration is installed in the cross beam form when concrete is constructed.

Second,

Sequencing operation -1

The compression transfer pad (6) of an incompressible and rigid material (eg steel casting) is inserted into the gap between the bottoms of the front and rear P.S.C beams (1,2), which are bundled with a cross beam.

The material of the compressive stress transmission pad may be a material having a strength higher than that of the beams 1 and 2 and a material such as steel or cast steel may be used as the material of the PSC beam 1, (1) and beam (2) at which the compressive stress is generated when the beam continuously flows through the gap between the beam (1) and the beam (2).

Sequencing Task-2

The required standard and the amount of stress applied to the prepared through hole 4-1 are determined through a precise analysis and then the predetermined threaded rod bolts 4-2 are inserted into the washer 4-3 and the nut 4-4 The PSC beam (1), the cross beam (4), and the bridge top plate are subjected to a compressive stress in the direction of the throttle by the bolt tightening, so that the entire bridge remains in the pre-stressing state in the continuous bridge, The PSC beam bridge consists of two stages: the complete preparation of the incomplete continuous part of the superstructure, and the preparation of the cross beam through hole and the continuous step. Instead of PS bolts (4-2), you can use a PS wire strand. In this case, you need to use a wedge anchor instead of a nut (4-4). The tension loss will be lost because of the slippage loss.

The sequencing step consists of three steps: installation of compression pad (6), steel bar bolt nut (4-2) (4-3) (4-4) insertion and tensioning.

Structural Behavior after Completion of Sequencing Work

Figure 1 Cross-beams and bridges in the two-zone girder bridge are subjected to compressive stress in the thrash direction, so that the cross beams due to the substantial moment of the secondary fixed load and the tensile stresses generated on the bridge deck are eliminated, It will be healed. In addition, since the rigidity of resisting against live load is increased, smooth continuous behavior of the bridge is achieved.

1: PSC beam Beam PSC Beam in front of bridge section
2: PSC Beam (PSC Beam) Bridge portion PSC Beam
3: Reinforced concrete bridge deck (RC Deck Slab)
4: Continuous Cross Beam (Cross Beam)
4-1: Continuous Cross Beam (Continuous Beam)
4-2: Continuous Cross Beam PSS Steel Bolt for Continuous Work Bolt
4-3: Cross section Beam for continuous beam work
4-4: Continuous Beam (Cross Beam) Nut for Continuous Work
5: PSC Beam (PSC Beam)
6: A compressive stress transmission pad (Pad), whose strength and rigidity are PSC beam (PSC Beam) concrete or more than concrete or steel (Steel or Cast Steel) The important device is to prevent compressive stress from interrupting between the beam (1) and the beam (2) during the continuity of the beam by filling the gap between the bottom ends. The thickness should be measured at each site, and the clearance between the beam (1) and beam (2) should be determined by precise analysis of the clearance change after welding the bolt (4-2).

Claims

Continuous sections -3, -4 and -5 in a continuous block (PSC beam) bridge of a PSC beam (two beam, three beam and more than two PSC beams) Similarly, the compression transmission pad 6 is installed in the gap between the lower two beams of the PSC beam (1, 2)
Thereafter, through-holes 4-1 for continuous work are placed in the continuous cross beams in one (1) or several (2) throttling directions symmetrically on both sides of each PSC beam (1,2) in the throttle direction, ,
The bolt 4-2 is inserted into the bolt 4-2 and the washer 4-3 and the nut 4-4 are tightened at a predetermined rotational force before and after the bolt 4-2 to compress the cross beam and the bridge top plate in the thrust direction (PSC Beam) bridges are made of continuous reinforced concrete, and the incomplete continuous portion of the upper structure is made into a continuous structure by introducing pre-stressing.

The method of claim 1, wherein
New PSC Beam bridge applied.

The method of claim 1, wherein
Applied to existing PSC Beam bridge.

The method of claim 1, wherein
The two quadrangles of the quadrature apparatus 5-1 and the quadrangement apparatus 5-2 in FIG. 3 are replaced with one quadrangement apparatus 5 in the center of the connection of the two PSC beams. .