KR100400701B1 - Method and apparatus for lifting upper portion of bridge - Google Patents

Abstract

The present invention relates to a bridge upper lifting method and apparatus therefor for raising a bridge upper part such as a top plate installed on a bridge with a jack, exploring a bridge reinforcement arrangement state, to form a plurality of grooves to avoid reinforcing bars Step of inserting one end of the bolt having a wedge portion in the groove, Coupling the wedge member to the wedge portion of the bolt, Coupling the jack support having a friction plate to the bolt, Coupling the nut to the other end of the bolt friction plate is It consists of the steps of pressurizing the side of the bridge, installing the jack on the jack support, and raising the upper part of the bridge with the jack. It can get supporting force, and its supporting performance can be easily adjusted to the surrounding conditions, easy to install jack support, and to break the piers. Because they do not follow the crowd on the pier, after work provides the effect that the demolition of the jack support easy and can eliminate the period of time required for the release of the concrete curing shorten the duration of the operation.

Description

Lifting method of bridge upper part and its device {Method and apparatus for lifting upper portion of bridge}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bridge top pulling apparatus, and more particularly, to a bridge top pulling method and apparatus for allowing a top of a bridge such as a top plate installed on a bridge to be pulled up by a jack.

In general, the bridge is composed of bridges and upper structures, such as bridge beams and top plates, which are installed over the bridges and the tops of the bridges. One end is fixed and the other end is installed over the piers in the state of movable end.

Such bridges must be repaired or replaced as time passes after installation, if the top plate or bridge system is damaged due to various types of natural or artificial factors. In addition, it may be necessary to replace the old bridge device with a new one with a relatively high height, in which case it is necessary to raise the upper bridge.

In general, a bridge repair is performed by using a hydraulic jack to lift a bridge upper part of a part requiring repair without dismantling or dismantling a bridge deck or beam structure. In order to lift the upper part of the bridge by using the hydraulic jack, there must be a space for installing the hydraulic jack between the bridge and the upper part of the bridge.

In other words, if there is a space for installing hydraulic jack between the bridge and the upper part of the bridge, there is no problem, but for example, a bridge using a hard rubber plate as a bridge device installed between the bridge and the upper part of the bridge, the jack between the bridge and the upper part of the bridge There is no space to install it. In this case, the side of the pier is crushed more than a certain amount, and a new reinforcing bar, such as to form a new concrete structure protruding to the side of the pier to use a hydraulic jack can be installed. In this regard, an example of a conventional bridge upper pulling method will be described with reference to FIGS. 1 and 2.

1 is a side view of a bridge for explaining a conventional bridge upper lifting method, Figure 2 is a block diagram for explaining the operation of the bridge in FIG.

That is, when the thickness of the hard rubber plate 60 such as the hard rubber plate 60 is used as the bridge device between the bridge 52 and the bridge upper portion 54, the hydraulic jack 70 cannot be provided on the top surface of the bridge 52. In this case, conventionally, as shown in FIG. 1, the upper side of the bridge 52 of the bridge is partially crushed (step 1), and the reinforcement 53 is put there to connect with the reinforcement 53a of the bridge 52. Then (step 2), surrounded by formwork (step 3), the concrete is poured (step 4) to cure for 7-8 days to form a jack support 56 integrally on the side of the piers 52 (step 5) The hydraulic jack 70 was installed thereon (step 6) to raise the bridge upper portion 54 (step 7).

In the case of using such an upper bridge raising method, the crushing work of the bridge 52 is very difficult.

In addition, a crack may occur in the piers 52 due to the impact acting in the fracture process of the piers 52.

In some cases, the vehicle must pass over the upper portion of the bridge 54. In this case, there is a problem in terms of safety because the joint strength between the existing bridge 52 and the newly-cast portion is weak. .

In addition to the concrete curing takes a lot of time, after the bridge repair is completed, the removal of the jack support 110 is very difficult.

Of course, when the height of the pier is low, it is possible to provide a jack support by installing a temporary structure on the ground side of the pier, but this is also uneconomical, difficult and difficult work.

An object of the present invention is to provide a bridge upper lifting method that can not only raise the bridge upper portion with a large support force without damaging the pier, but also easy installation of the jack support, easy to remove the jack support after work.

Another object of the present invention is to provide an upper bridge lifting device for implementing the method of the present invention.

1 is a side view of a bridge for explaining a conventional bridge upper lifting method,

FIG. 2 is a block diagram illustrating a working process in the bridge shown in FIG. 1;

3 is a side cross-sectional view of a bridge showing a state where the upper bridge lifting apparatus according to the present invention is installed,

4 is a front view of the bridge showing a state in which the upper bridge lifting apparatus according to the present invention is installed,

5 is a partially enlarged cross-sectional view showing a state in which the jack support is fixed,

Figure 6 is a side cross-sectional view showing a state in which the jack support on both sides of the piers connected by the tension bar,

7 and 8 are an exploded perspective view of the bolt and nut, the wedge member and the reinforcing plate for bringing the friction plate described in FIGS.

9 is a block diagram for explaining a work process according to the bridge upper lifting method according to the present invention.

Explanation of symbols on the main parts of the drawings

50: bridge 52: bridge

53: home 54: the upper bridge

70: jack 100: bridge upper lifting device

110: jack support 112: horizontal plate

114: friction plate 115: bolt hole

116: reinforcement plate 120: bolt

122: wedge 123: bolt support

130: wedge member 140: nut

150: reinforcing plate 160: horizontal reinforcing plate

162: tension bar

SUMMARY OF THE INVENTION An object of the present invention is a method of raising a bridge top for lifting a bridge supported by a bridge, the method comprising: exploring the arrangement state of reinforcing bars inside a bridge, and forming a plurality of grooves by avoiding the bars that are explored on the side of the bridge Inserting one end of the bolt having a wedge portion in the groove, Coupling the wedge member to the wedge portion of the bolt, Coupling jack jack having a friction plate on the other end of the bolt, Coupling the nut on the other end of the bolt It is achievable by the bridge upper lifting method comprising the step of being pressed to the side of the bridge, the step of installing the jack on the jack support and the step of raising the upper bridge with the jack.

It is preferable that the configuration further includes the step of tensioning the bolt before the upper nut is completely engaged.

It is more preferable that the configuration further comprises the step of inserting the bolt support on the bottom of the upper bolt and the step of inserting the reinforcement plate between the friction plate and the nut.

After the upper portion of the bridge, it is more preferable to further include a step of connecting and pulling the friction plates installed on both sides of the upper pier.

Another object of the present invention is to install a bridge on the bridge to raise the upper portion of the bridge using a jack, a jack support for supporting the jack with a friction plate that can contact the side of the pier It can be inserted into a hole formed in the side, and the wedge is formed at one end, the wedge member is coupled to the wedge portion and coupled to the other end of the bolt, characterized in that it comprises a nut for pressing the friction plate to the side of the piers Achievable by the bridge upper lifting device.

The upper wedge portion may have a configuration in which a wedge-shaped nut is screwed to one end of the bolt.

It is preferable to further include a bolt support inserted into the upper hole to support the bottom of the bolt, and a reinforcing plate coupled between the friction plate and the nut.

It is better to have a configuration further comprising a tension bar installed on the upper surface of the pier connecting the friction plate of both sides of the pier.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 3 is a side cross-sectional view of the bridge showing a state in which the upper bridge lifting device according to the present invention is installed, Figure 4 is a front view of the bridge showing a state in which the bridge upper lifting device according to the present invention, Figure 5 is a jack support fixed It is a partially enlarged cross-sectional view showing the state.

3 and 4 show a bridge consisting of a bridge 52 and an upper portion 54 supported by the bridge 52. The bridge 52 is installed in a columnar shape on the ground to support the upper portion 54 of the bridge beam, the upper plate, and the like, and the vehicle passes through the upper surface of the upper portion 54 of the bridge.

As shown in FIG. 3, a hard rubber plate 60 is provided between the bridge 52 and the upper portion 54, and there is no space for installing the jack 70 between the upper surface of the bridge 52 and the upper portion 54. In this case, the jack support 110 should be installed on the side of the piers 52 to allow the jack 70 to be installed.

As shown, the upper bridge lifting device 100 according to the present invention is provided with a jack support 110 for supporting the jack (70). The jack support 110 is horizontally arranged to support the bottom of the horizontal plate 112, the friction plate 114 and the horizontal plate 112 in close contact with the side of the pier 52 to support the bottom of the jack 70 The note is made of a reinforcing plate 116. A bolt hole 115 is formed in the friction plate 114. The jack support 110 should be made by determining the thickness of the friction plate 114, the reinforcement plate 116, the horizontal plate 112 in consideration of the weight of the upper bridge (54).

As shown, a plurality of grooves 53 are formed at the side of the piers 52. A bolt 120 for pressing the friction plate 114 to the side of the piers 52 is coupled to the groove 53. The wedge part 122 is formed in the inner end of the bolt 120. The wedge portion 122 may be formed integrally with the bolt 120, or in some cases may use a wedge-shaped nut screwed to the end of the bolt 122.

The wedge part 122 is coupled to the ring-shaped wedge member 130. The wedge member 130 is to prevent the bolt 120 from falling out of the groove 53 by the action of the wedge portion 122 of the bolt 120. The bolt 120 and the wedge member 130 are described in more detail later with reference to FIGS. 7 and 8.

As shown, the bolt support 123 is inserted into the lower groove 53 of the bolt 120. The bolt support 123 is not necessarily required, but it is preferable to install the bolt support 123 to support the jack support 110 stably with a greater force.

In addition, by inserting the reinforcing plate 150 between the nut 140 and the friction plate 114, it is preferable that the entire surface of the friction plate 114 is in close contact with the outer surface of the piers 52.

That is, the bolt 120 having the wedge portion 122 formed therein is inserted into the groove 53, and the wedge member 130 is inserted into the bolt 120 and sufficiently pushed into a pipe or the like to press the bolt support 123. Inserting the reinforcing plate 150 on the surface thereof while the friction plate 114 having the bolt hole 115 is formed on the pier 52 and inserted into the outer side thereof, and the nut 140 is filled. The bolt 120 is then pulled outward with the calculated force using a tensioner. At this time, the wedge portion 122 of the bolt 120 gradually expands the wedge member 130, and the wedge member 130 is fixed to the inside of the groove 53 and does not fall outward. When the bolt 120 is pulled outward with a predetermined load, the bolt 120 is stretched in proportion to the pulling force. If the nut 140 is sufficiently locked in this state, the bolt 120 will remain in tension even if the load is removed. Accordingly, each bolt 120 pulls the nut 140 with a force equal to the load used to tension the bolt 120, and the nut 140 pierches the friction plate 114 through the reinforcing plate 150. To 52.

If the friction coefficient between the friction plate 114 and the piers 52 is µ, the load for tensioning the bolts 120 is T, and the number of bolts 120 is n, the frictional force acting between the friction plate 114 and the piers 52. The load W that can be supported by is expressed by the following equation.

W = nTμ.

That is, when the weight of the upper portion of the bridge 54 is 100 tons, the friction coefficient between the friction plate 114 and the bridge 52 is 0.2, and the number of bolts 120 used is 10, the bolt 120 is 50 tons. The nut 140 may be locked by tension. In practice, of course, in consideration of safety, it is necessary to increase the number of bolts 120 or to increase the force for tensioning the bolts 120 even more.

That is, in the present invention, the load on the upper bridge portion 54 is supported by the frictional force acting between the friction plate 114 and the bridge 52. The frictional force acting between the friction plate 114 and the piers 52 can be adjusted by the tension of the bolts 120 or the number of bolts 120, so the present invention is applicable regardless of the weight of the upper portion of the bridge 54. can do.

6 is a side cross-sectional view illustrating a state in which jack supports on both sides of the piers are connected by tension bars.

After installing the jack support 110 in the above-described process to lift the upper portion of the bridge 54, the horizontal reinforcing plate 160 is installed on the upper surface of the bridge 52 to prevent the upper side of the friction plate 114 is opened, It is better to assemble this by welding or a separate method using bolts and nuts, etc. to the friction plate 114, and then connect the two horizontal reinforcing plates 160 to the tension bar 162 to pull each other.

7 and 8 are separated perspective views of bolts and nuts, wedge members, and reinforcing plates for bringing the friction plates described with reference to FIGS. 3 to 5 into close contact with the piers.

As can be seen in FIGS. 7 and 8, the wedge portion 122 is installed at one end of the bolt 120. As shown in FIG. 7, the wedge part 122 may be configured by screwing a wedge-shaped nut inclined toward one side thereof to one end of the bolt 120, and as shown in FIG. 8. 122 may be integrally formed with one end of the bolt 120. The other end of the bolt 120 should be formed of the spiral 125, as well as forming the protrusion 127 so that the tensioner can catch when tensioning the bolt 120 to the outside of the spiral 125 good.

The wedge member 130 is preferably configured to have a ring-shaped cut one side, the inner circumferential surface thereof is narrowed toward the one side, the outer diameter is gradually increased when the wedge portion 122 is inserted more than a predetermined.

The reinforcement plate 150 is for the force that the nut 140 acts on the friction plate 114 by the pulling force of the bolt 120 to uniformly act on the entire surface of the friction plate 114, the nut 140 is bolt Is coupled to the outer end of the 120 to maintain the tensioned state of the bolt 120 is to be able to apply a pressing force to the friction plate 114.

9 is a block diagram for explaining a work process according to the bridge upper lifting method according to the present invention.

Referring to Figures 3 to 8 described above with reference to the working process by the bridge upper lifting method of the present invention as follows.

First, the arrangement state of the reinforcing bars is grasped by an ultrasonic probe in the vicinity of the upper end of the bridge 52 supporting the upper bridge portion 54 to be lifted (step 11). Then select a place without reinforcing bars to form a plurality of grooves 53 by drilling on the upper side of the pier 52 (step 12). Then, one end of the bolt 120 with the wedge portion 122 is inserted into the groove 53, and the wedge member 130 is coupled to the wedge portion 122 (step 13). At this time, the wedge member 130 may be sufficiently inserted to use a pipe or the like so as to be sandwiched between the inner circumferential surface of the groove 53 and the wedge portion 122. After installing the bolts 120 in each of the grooves 53, the bolt support 150 is inserted into the lower surface of the bolts 120 (step 14), and the friction plate 114 is provided on the side of the piers 52 on which the bolts 120 are installed. Attach the jack support 110 with (step 15). Hold the reinforcement plate 150 out of the friction plate 114 (step 16) and engage the nut 140 from the outside (step 17). With the nut 140 coupled to the bolt 120, hold the end of the bolt 120 with the tensioning machine and pull it outward (step 18). The tensile force for tensioning the bolt 120 is calculated in advance in the manner described above in consideration of safety. Tighten the nut 140 sufficiently while the bolt 120 is tensioned with the calculated force to allow the bolt 120 to remain in tension, and then release the force that was pulling the bolt 120 (step 19 ). After the jack support 110 is installed in the above process, the jack support 110 is installed on the upper surface of the jack support 110 (step 20), and jacked up to raise the bridge upper portion 54 (step 21). Then, each of the horizontal reinforcing plate 160 is placed on the upper surface of the pier 52, and assembled in a separate method using welding or bolts, nuts, etc. on the upper side of the corresponding side friction plate 114 (step 22), and then The horizontal reinforcing plate 160 is connected to the tension bar 162 so that the upper end portion of the friction plate 114 is not opened by the load of the upper bridge portion 54 (step 23).

After the work is completed, the work in the reverse order to separate the jack support 110 from the piers 52 can be reused. Difficult to separate, such as bolt 120 is to cut only the portion protruding to the outside of the groove 53, fill the groove 53 filled with concrete or waterproof material.

As can be seen from the above description, in the case of using the upper bridge lifting method and the device according to the present invention, since the load on the upper bridge is supported by the friction force between the friction plate and the bridge, a large bearing force can be obtained, and the supporting performance is increased. It can be easily adjusted to the conditions and easy to install the jack support.

The bridges do not have to be damaged because the bridges do not have to be damaged except for forming grooves.

After work it is easy to dismantle the jack support.

The period of work for curing concrete can be eliminated, thus reducing the working period.

Claims (8)

In the bridge top raising method for raising the bridge top supported by the bridge, Exploring the reinforcement state of the interior of the pier; Forming a plurality of grooves by avoiding the explored rebars on the side of the pier; Inserting one end of a bolt having a wedge into the groove; Coupling a wedge member to the wedge portion of the bolt; Coupling a jack support having a friction plate to the other end of the bolt; Coupling a nut to the other end of the bolt to press the friction plate against the side of the piers; Installing a jack on the jack support; And And lifting the bridge upper portion with the jack. 8. The method of claim 1 further comprising tensioning the bolt prior to fully engaging the nut. The method of claim 1, further comprising inserting a bolt support on the bottom of the bolt and inserting a reinforcing plate between the friction plate and the nut. The method according to any one of claims 1 to 3, further comprising the step of pulling the friction plates connected to each other on both sides of the bridge to pull each other. In the bridge upper lifting device to be installed in the bridge to be able to use the jack to raise the upper portion of the bridge, A jack base capable of supporting the jack with a friction plate contactable to the side of the piers; A bolt which can be inserted into a hole formed at a side of the pier and has a wedge formed at one end thereof; A wedge member coupled to the wedge portion; And And a nut coupled to the other end of the bolt to press the friction plate to the side of the pier. According to claim 5, The wedge portion bridge upper lifting device, characterized in that the wedge-shaped nut is screwed to one end of the bolt. 7. The upper bridge lifting device according to claim 5 or 6, further comprising a bolt support inserted into the hole to support the bottom of the bolt, and a reinforcing plate coupled between the friction plate and the nut. . 7. The upper portion of the bridge upper lifting apparatus according to claim 5 or 6, further comprising a tension bar installed on the upper surface of the pier to draw and connect the friction plates on both sides of the pier.