KR20100026917A

KR20100026917A - Bridge having expansion joint and method of setting expansion joint

Info

Publication number: KR20100026917A
Application number: KR1020080103108A
Authority: KR
Inventors: 소재헌
Original assignee: 소재헌
Priority date: 2008-09-01
Filing date: 2008-10-21
Publication date: 2010-03-10

Abstract

PURPOSE: A bridge equipped with an expandable joint device and a construction method thereof are provided to reduce waste production and prevent the service life of a slab when an expandable joint device is repaired or replaced. CONSTITUTION: An expandable joint device comprises an expandable joint member(220) and a medium member. The expandable joint member comprises a horizontal upper part(221) and a support part(223). The horizontal upper part comprises a finger part which is coupled with the expandable joint member of a slab(110) and forms a part of a road. The support part is integrated with the horizontal upper part and support the horizontal upper part, positioned in a block out space. The support part is fixed to the slab by a fixing unit.

Description

Bridge having expansion joint and method of setting expansion joint

The present invention relates to a bridge, and more particularly, to an expansion joint device and a method for installing the same, which are installed in a portion of the bridge forming a gap between the slab and the end of the slab alternately.

Modern bridges often have upper slabs of concrete and ascone. A bridge is usually achieved by placing alternating slabs on both sides and laying slabs that form the top plate between the shift and the shift. If the length of the bridge becomes longer, the bridge is supported by the middle of the slab, or the slab is composed of a plurality of bridges while supporting the bridge to form a bridge.

1 is a block-out space is formed by removing the upper edge of the end of the slab and the alternating portion of the slab and the slab or the slab and the alternating 21 in the conventional bridge, to install the expansion joint in the block-out space It is sectional drawing which shows the state in which the concrete parts 17 and 27 were installed as the embedding material.

As in the example of FIG. 1, the bridge slab is composed of a steel material at the bottom, a PC box or PC beam 11 ', an upper slab concrete layer 13', and an asphalt concrete pavement 15 on the upper side. The expansion joints are not separately displayed on the concrete parts 17 and 27 formed at the block-outs at the upper ends of the bridge slabs. Reference numeral 29 denotes a pier. At this time, the pier supports all the loads and vehicle running loads of steel, PC box or PC beam 11 'and slab concrete layer 13' and the asphalt concrete layer 15 'above. Play a role.

Bridge expansion joint is a natural expansion and contraction of bridge structure such as slab due to temperature change of surrounding environment, creep and dry shrinkage of concrete, deflection of beam, load, etc. It is an apparatus for maintaining the flatness of a road surface so that a vehicle using a bridge can run safely without causing problems such as cracking due to stress or the like. On the other hand, the bridge expansion joint also serves to prevent the corrosion of concrete by preventing the road surface and various foreign matters to enter the bridge clearance.

Rubber joints include new monocell joints, monocell joints, NB, transplex and ace joints as rubber products, and new finger joints, new monocell joints, new wave finger joints, Ultra Rodway Joint, Wave Flexible Joint, Fresine Joint, Strong Finger Joint, Rail Joint.

Fig. 2 is a plan view showing a conventional example in which a bridge expansion and contraction device is installed at a position where a slab of a bridge and a slab are connected to each other.

Most of the slab is covered with an asphalt concrete layer 15 to form a paving section, and in the block-out space, a concrete section 17A and 17B forms a connection section, and a conventional expansion joint member 19A having fingers 195A and 195B. , 19B) extends outward into the space between the spaced slabs and covers the gap between the slabs to form a stretch joint section.

On the same level as the bridge road surface (usually pavement), the finger portion keeps the road surface of the bridge flat even in spite of the gap between the slabs, and the fingers of adjacent expansion joint members interlock with each other to form irregularities. Do not let the wheels of the wheel fall into the gap between the slabs.

The uneven length of the finger portion is formed in consideration of the thermal expansion length of the slab between seasons. For example, in the summer when the slab expands and the engagement period between the unevenness becomes longer, the gap between the recess and the convex part can still be kept small. To determine the length of the concavities and convexity, so that the gaps are not interlocked.

Referring to Figure 3, the construction of a conventional bridge expansion joint is a position required for the expansion joint member in the block-out space, that is the removal portion made on the upper end of the slab longitudinal direction in the direction of the vehicle when placing slab concrete After setting (setting) in the formwork and reinforcing bars are assembled by super-hard concrete, which is the futa ash in the field is made by the method of sufficient curing.

This is because the expansion joint member 19A, 19B is attached to the back of the anchor 191, the anchor 191 is fixed to the rebar 193 exposed from the slab 11, and then to the back of the expansion joint It is a method of fixing the expansion joint device to be integrated with the slab 11 by pouring super-concrete concrete parts 17A and 17B. According to this method, some bodies of the expansion joint members 19A and 19B such as the anchor 191 are buried in the concrete parts 17A and 17B to form a fixed state.

However, this type of expansion joint is weakened due to damage and fatigue with use over time, so it is necessary to replace it periodically or when it finds special damage. At this time, the expansion joint members 19A and 19B are partially buried in the concrete parts 17A and 17B, so that it is impossible to remove them from the slab 11 before removing the concrete parts. The super-concrete concrete forming the concrete part is usually crushed and removed by the breca, but the hardness is higher than the concrete forming the slab 11, and is very well attached, so removing the super-concrete concrete to replace and repair the expansion joint member is necessary. This is a very difficult task and generates a lot of waste.

In addition, in the process of removing the super-concrete concrete part, the concrete breaker gives a strong impact to the block-out space of the slab, thereby crushing the super-concrete concrete. There is a problem that the surrounding slab concrete and reinforcing bars are damaged together, removed, and cracks are generated and expanded to weaken the durability of the slab 11 and shorten the life of the slab 11. Therefore, it is also difficult to install a new expansion joint member, and this problem is expanded as the maintenance replacement operation is repeated.

In the present embodiment, the case of placing cemented carbide concrete in the block-out space is an example, but the installation of other concrete or mortar material may cause similar problems, but may cause similar problems. Damage to members, buried materials and demand for replacement can occur frequently.

The present invention is to solve the problems caused by the installation and replacement of conventional expansion joints, bridges having an expansion joint structure that can prevent the problem of reducing the life of the slab when repairing and replacing the expansion joints And to provide a expansion joint installation method.

An object of the present invention is to provide a bridge and expansion joint installation method having a expansion joint structure that can reduce the generation of waste when repairing, replacement of the expansion joint.

An object of the present invention is to provide a bridge and expansion joint installation method having a expansion joint structure that allows for easy maintenance and replacement of the expansion joint.

The present invention for achieving the above object, in the bridge having a slab formed with a block out space and the expansion joint device is installed in the block out space,

The expansion joint device has an expansion joint member and the expansion joint member is detachably fastened by fixing means fixed to the slab.

In the present invention, the expansion joint device has an expansion joint member,

The expansion joint member extends outwardly (forward) in the block-out space and has a horizontal upper part forming a part of the road surface, having a portion that is displaceably coupled with the opposed slab or alternating expansion joint device,

It is formed integrally with the horizontal upper portion, and may be made of a support portion for being detachably fastened by a fixing means fixed to the slab while being positioned in the block-out space to support the horizontal upper portion.

In the present invention, the horizontal upper portion may have a concave-convex finger portion so as to be displaceably coupled with the horizontal upper portion of the opposite relative expansion joint.

In the present invention, the block-out space is located at the upper edge of the longitudinal end of the slab, and has a step surface and a stepped width and a sidewall forming a step between the road surface and the width surface, having a step with the road surface of the bridge. The space may be defined (defined) by the side wall surface. The expansion joint device may be formed on the one hand (rearward) through the side wall surface and the filling material such as super-concrete concrete, and on the other hand (forward), further comprising an intermediate member coupled to the expansion joint member.

At this time, the support may be formed with a vertical support and a horizontal support, the upper portion of the vertical support is connected to the horizontal upper portion, the lower portion of the vertical support is connected to the horizontal support, the horizontal support Is fixed to the width surface by the fixing means, the horizontal upper portion may be coupled to the intermediate member.

In the present invention, the fixing means may be fixing means such as an anchor bolt embedded in the sleeve and a nut coupled thereto, and the support of the expansion joint member may be detachably coupled using the fixing means. At this time, the support portion has a through hole penetrated by the anchor to secure to the anchor bolt, the nut may be fastened through a nut fastening hole or a work ball formed in the horizontal upper portion.

Expansion joint installation method according to an aspect of the present invention,

Preparing a slab for the bridge is provided in the block-out space is provided, the step of moving the expansion joint member to engage the coupling portion of the expansion joint member to the fixing means of the block-out space. For example, in the case where the fixing means is an anchor bolt, the expansion joint member has a through hole through which the anchor bolt penetrates so that the anchor bolt is fitted, and the anchor bolt is filled with a nut through a work hole in the horizontal upper portion.

If there is an intermediate member, the expansion joint member is moved to engage the fixing means of the block-out space, and then the intermediate member is fixed to the rear end of the expansion joint member by using separate fixing means, and between the intermediate member and the slab in the block-out space. Filling the space with the mortar material, such as super-concrete concrete, is filled and cured so that there is no lifting between the member and the slab so that the rear is stably supported. The intermediate member and the expansion joint member may be fixed using an auxiliary member such as a steel joint member such that vibration does not occur due to mutual movement, or some welding may be performed.

The intermediate member itself can be fixed to the slab by the attachment force with the rear mortar material without a separate fixing means, but the method of fixing the slab and the intermediate member is already formed anchor bolt, such as installing the expansion joint member in the block-out space. It may be made in the form of coupling the coupling portion, such as through-holes of the medial member to a separate fixing means. In this case, the step of moving the expansion joint member to engage the engaging portion of the expansion joint member to the fixing means of the block-out space, or at the same time to subsequently combine the intermediate member with a separate fixing means, the expansion joint member and the intermediate member mutually Fixing step will be further provided.

According to the present invention, it is easy to install and replace the expansion joint device of the bridge to reduce the required cost, time and effort, waste material by crushing and removing the concrete part for laying expansion joint devices, such as super-concrete concrete at the time of replacement Can reduce the risk of bridge life shortening due to breakage and weakening of the surrounding slab caused by expansion joint replacement.

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

Figure 4 is a side cross-sectional view showing the expansion joint portion of an embodiment of the present invention, Figure 7 is a plan view of the expansion joint portion of an embodiment of the present invention.

In order to form the structure as shown in FIG. 4, first, in the process of forming the bridge slab 110, the block-out space is positioned at the upper end of the slab which is adjacent to the adjacent slab or the alternation. At this time, the anchor bolt 235 is installed to the width of the block out. Since the slab 110 usually forms a reinforced concrete structure, it is preferable to form the anchor bolt 235 together while curing the concrete by pouring it into the mold. Alternatively, a method of making a slab 110 having a block-out space and forming an anchor bolt 235 hole in the width of the block-out, inserting the anchor bolt into the hole, and then pour concrete around it may be considered. This method is particularly suitable when practicing the present invention using slabs of existing bridges.

The expansion joint member 220 may be formed by processing a ready-made H-shaped steel. The through hole 227 to be penetrated by the anchor bolt is installed on the lower leg among the two legs extending rearward with respect to the center joint portion of the H-beam in the lying state, and the nut fastening hole is attached to the upper leg to align with the through hole 227. 226). The lower side of the two legs extending to the front of the H-beam is removed, and the upper leg cuts a portion in a plane to form a finger-like shape of irregularities. In this way, the center joint portion of the original H-beam becomes the vertical support portion 223 of the expansion joint member 220, and the upper leg forms a part of the road surface of the bridge as the horizontal upper portion 221 including the finger portion, and the remaining lower leg. Becomes the horizontal lower limb 225.

The expansion joint member 220 is approached to the block-out space of the slab 110 so that the anchor bolt 235 penetrates the through hole 227 of the horizontal base portion 225 and the expansion joint member 220 and the slab 110. ) To be combined. The anchor bolt 235 is filled with a nut 237 to secure the expansion joint member and the slab. The horizontal upper portion 221 is provided so that the work hole or nut collecting hole 226 is aligned with the through hole 227 to fill the nut 237 to the anchor bolt 235 from the top. When the work is finished, the nut fastening hole 237 can be closed with a stopper (not shown) to prevent foreign substances or rainwater from flowing into the anchor bolt and the nut.

In this embodiment, as shown in Fig. 7, the nut fastening holes are installed in three rows along the width direction of the bridge in the horizontal upper portion of the expansion joint member, but two rows are possible in structural calculation.

The metal plate 210 is coupled to the rear end of the expansion joint member 220. The metal plate is coupled in a vertically erected state as an intermediate member, and serves to surround the space surrounded by the horizontal upper portion 221, the vertical support portion 223, and the horizontal base portion 225 in the expansion joint member 220. As the filling material, the mortar material 170 prevents the anchor bolt 235 and the nut 237 from being introduced into the space where the anchor bolt 235 and the nut 237 are fastened. A portion of the metal plate 210 and the expansion joint member 220 is fixed to be welded or a member such as a steel connection member 239 so as not to move with each other. In this state, the metal plate 210 is filled with non-condensed concrete, which is a mortar material 170, between the metal plate 210 and the sidewall surface of the slab 110, and is cured. Since the concrete constituting the slab 110 is generally less strength than the metal plate 210 such as steel plate, the mortar material 170 is used to prevent the breakage of the portion in contact with the metal plate 210 easily while forming a buffer area by using the strong concrete. It is preferable. In addition, it is preferable to use superhard concrete having a curing time of about 3 hours for rapid construction.

Mortar material 170 fills the space between the expansion joint and the slab in the expansion joint member 220, expansion joints such as the intermediate member in the block-out space. When the empty space is filled with the mortar material 170, the rear of the expansion joint is more stably supported, and the force or vibration received by the expansion joint may be attenuated while being transmitted to the slab 110. If the block-out space fits the expansion joint size and there is no extra space, the mortar material 170 filling the space may not be installed.

If the expansion joint is damaged or deteriorated by use over time and needs to be replaced, remove the stopper of the nut fastening hole 226 of the horizontal upper portion 221, and remove the nut 237 from the anchor bolt 235 On the other hand, only the expansion joint member 220 can be easily removed from the slab 110 by releasing the connection between the metal member 210 and the expansion joint member 220 which are the intermediate members. At this time, there is no hassle of crushing and removing the concrete fixed to the expansion joint member as in the prior art. The new expansion joint member is moved to the position where the previous expansion joint member was in the reverse order, is engaged with the anchor bolt 235, and the nut 237 is filled. The intermediate member is fixed to each other using an auxiliary member such as some welding or steel connecting member 239.

FIG. 5 uses a U-shaped cylindrical metal beam instead of a metal plate as an intermediate member in the embodiment of FIG. The ㅁ -shaped metal beam 310 is wider than the metal plate to reduce the amount of mortar material 170 to be poured in the case where the block-out space is wide, while reducing the installation width of the expansion joint member 320. Can be.

ㅁ metal beam 310 has a rear side 311 which is one side of the four sides in contact with the mortar material 170, the front side 313 facing the rear side 311 is in contact with the expansion joint member 320 It is fixed by the steel connecting material 339 or partial welding. Thus, the surface common to the metal plate 210 shown in the embodiment of FIG. 4 is that the K-shaped metal beam 320 is in contact with the mortar material 170 on one side and the expansion joint member 320 on the other side. have. However, unlike the simple metal plate 210 as shown in FIG. 4, the U-shaped metal beam 310 has through holes in the upper side and the lower side 315, which are two sides connecting the rear side 311 and the front side 313, respectively. 317 and the nut fastening hole 316 are used to fasten with the anchor bolt 335A, which is a separate fixing means of the slab 110 by using them.

Looking at the installation method of the expansion joint of this type, as shown in the case of installing the embodiment of Figure 4, the expansion joint member 320 in the anchor bolt (335A, 335B) is installed in the block-out space of the slab 110 ) To allow the anchor bolt 335B to pass through the through hole 327. The expansion joint member 320 is narrower than the embodiment of FIG. 4 so that the through hole 327 through which the anchor bolt 335B penetrates is formed in one row with two rows reduced. In this state, the expansion joint member 320 and the slab 110 are coupled and fixed by engaging the nut 337B from the upper end of the anchor bolt 335B. Similar to the expansion joint member 320, by inserting the through-hole 317 of the lower side 315 of the K-shaped metal beam 310 to the anchor bolt 335A, which is a separate fixing means, and tightens the nut 337A. The type metal beam 310 is installed in the block-out space as an intermediate member. Whether to install the expansion joint member 320 in the block-out space first, or to install the K-shaped metal beam 310 first, the choice or expansion of the expansion joint member 320 by fixing the K-shaped metal beam 310 first. If the space is first determined, it may be easier to install the expansion joint member.

After all of the intermediate members including the expansion joint member 320 and the ㅁ -shaped metal beam 310 are seated in the block-out space, the expansion joint member and the ㅁ -shaped metal beam are fixed to each other using the steel connecting member 339. Between the rear side 311 of the ㅁ -shaped metal beam 310 and the side wall surface facing the block-out space of the slab 110, non-shrinkable superhard concrete is poured with higher strength than the concrete forming the slab as the mortar material 170. Is cured.

The horizontal upper portion 321 including the upper side of the ㅁ -shaped metal beam 310 and the finger portion of the expansion joint member 320 forms part of the road surface. Even in this embodiment, after the nuts 337A and 337B are fastened, the nut fastening holes 316 and 326 disposed on the upper side of the ㅁ shaped metal beam 310 and the horizontal upper part 321 of the expansion joint member 320 are blocked with a synthetic resin stopper. Mortar material, rainwater, and other foreign matter may be prevented from entering the space where the nuts 337A and 337B are fastened to the anchor bolts 335A and 335B.

When replacing expansion joints, it is common to replace only expansion joint members that are severely damaged and deteriorated. In this case, after cutting the weld part responsible for fixing the expansion joint member and the intermediate member or dismantling the steel connecting member, remove the nut fastened to the upper part of the anchor bolt through the nut fastening hole, move the expansion joint member, and move the new expansion joint This is done by moving the member to the installation site of the block-out space and assembling it in the reverse order as in the first installation.

The expansion joint member is installed between the two expansion joints of the adjacent slab so that the expansion joint member is in a state where the concave and convex portions of the concavities and convexities forming the finger portion are engaged with each other, as shown in the conventional example of FIG. Adjust differently depending on the temperature. The installation height of the expansion joint member is installed so that the horizontal top of the expansion joint member has no step based on the height of the road surface of the bridge. The part filled with the mortar material also needs to allow the top surface of the mortar to run as steplessly as possible to prevent the impact, vibration and mechanical damage caused by the road step. In order to match the installation height of the expansion joint member, a mortar material may be applied on the width surface to a certain thickness on the portion where the horizontal bottom support of the expansion joint member is placed.

The portion of the expansion joint member directly covering the gap between the slab and the slab or the alternating slab is a conventional but not limited finger portion extending horizontally above the gap, but all types of conventional expansion joint members may be used. .

FIG. 6 is a second medial consisting of an I-type metal beam in a standing state or an H-shaped metal beam in a lying down state between the first intermediate member made of the metal plate 410 and the expansion joint member 420, compared to the embodiment of FIG. The difference is that the member 430 is installed.

Looking at one method of forming such an embodiment, first, the steel connecting member on the rear end of the upper horizontal surface 431 in the state in which the metal plate 410, which is the first intermediate member, the H-type metal beam, which is the second intermediate member 430, is laid down. Fix using a fixing means such as (449A). The rear end of the lower horizontal surface 435 may also be fixed to the lower end of the metal plate with a steel connecting material, if necessary. Next, the through-hole 437 in the lower horizontal surface 435 of the second intermediate member 430 is moved to the block-out space of the slab 110 by mutually fixing the intermediate member anchor bolt (which is a separate fixing means of the slab) 447A). The nut 445A is fastened to the upper end of the anchor bolt 447A through the nut coupling hole 436 in the upper horizontal surface 431 of the second intermediate member. Subsequently, the expansion joint member 420 is moved to fix the through hole 427, the anchor bolt 447B, and the nut 445B as in the previous embodiments. The rear end of the horizontal joint 421 of the expansion joint member is fixed by the fixing means such as the front horizontal plane 431 of the second intermediate member 430 and the steel connecting member 449B, and the front end of the lower horizontal plane 435 and the expansion joint member The rear end of the horizontal leg support 9425 may also be fixed through the fixing means.

The superhard diameter non-condensed concrete is filled and cured with mortar material 170 in the space between the sidewall surface of the slab forming the block-out space to the rear of the first media member made of the metal plate 410.

Although the configuration and installation method of the present invention have been described through several embodiments, the present invention is not limited to these embodiments, and it is natural that various modifications may be included within the same technical scope.

1 is a block-out space is formed by removing the upper edge of the end of the slab and the alternating portion of the slab and the slab or the alternating slab in the conventional concrete bridge, buried material for installing the expansion joint in the block-out space It is sectional drawing which shows the state where the concrete part was installed.

Fig. 3 is a side sectional view showing a conventional example in which the expansion joint device for bridges is installed.

Figure 4 is a side sectional view showing the expansion joint according to an embodiment of the present invention.

5 is a side sectional view showing the expansion joint according to another embodiment of the present invention.

Figure 6 is a side sectional view showing the expansion joint according to another embodiment of the present invention.

7 is a plan view showing the expansion joint according to an embodiment of the present invention.

Claims

In a bridge having a slab with a block-out space and a expansion joint device installed in the block-out space,

The expansion joint device has a expansion joint member and the expansion joint member is a bridge, characterized in that detachable fastening by the fixing means fixed to the slab.

The method of claim 1,

The expansion joint device is provided with an intermediate member coupled to the rear via the slab and the filling material and coupled to the expansion joint member to the front,

The expansion joint member includes a horizontal upper portion constituting a part of a road surface while including a concave-convex finger portion which is extended outwardly from the block-out space and is displaceably coupled to an opposed expansion joint member that is opposed to the opposite slab or alternately. It is formed to be provided with a support for supporting the horizontal upper portion while being located in the block out space,

The support portion is a bridge, characterized in that fixed to the slab by the fixing means.

The method of claim 2, wherein the intermediate member

Made of metal,

It consists of a metal cylinder of the K-shaped fastened to the slab by a separate fixing means,

And a first intermediate member made of a metal plate, and a second intermediate member of I-type or lying down H-shape interposed between the first intermediate member and the expansion joint member and fastened to the slab by a separate fixing means. Featured bridge.

The method according to any one of claims 2 to 3,

The fixing means is an anchor bolt fixed to the slab,

The support portion is formed with a through hole penetrated by the anchor bolt,

The expansion joint member and the slab is a bridge characterized in that the through-hole is fixed to each other by being fastened by a nut in the state penetrated through the anchor bolt.

Preparing a bridge slab having fixing means installed in the block-out space;

Moving the expansion joint member to couple the coupling portion of the expansion joint member to the fixing means.

The method of claim 5, wherein

Moving the expansion joint member to engage the coupling part of the expansion joint member to the fixing means simultaneously or subsequently coupling the intermediate member to a separate fixing means;

And further comprising fixing the expansion joint member and the intermediate member to each other using a welding or fastening member.

The method according to claim 5 or 6,

The fixing means is an anchor bolt fixed to the slab, the expansion joint member has a through hole penetrated by the anchor bolt, in the step of coupling the coupling portion of the expansion joint member to the fixing means the anchor bolt is through Construction method for the expansion joint of the bridge, characterized in that the nut is filled in the anchor bolt after being inserted into the ball.