JP2809114B2 - Lifting support method and bearing device for bridges etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a device for lifting and supporting a bridge or the like for mounting and replacing a bearing device interposed between a structure such as a bridge and a substructure. The present invention relates to a lifting support method and a supporting device for a bridge or the like that can provide a new supporting device even in a site where a work space is extremely narrow and a situation where the existing supporting device cannot be removed is too narrow.

[0002]

2. Description of the Related Art As shown in FIG. 15, a structure (hereinafter, referred to as a bridge) or a highway supported by a bearing device, such as a completed highway, is shown in FIG.
A vertical load such as a dead load or a live load of the bridge A is reliably transmitted to the substructure B between the bridge A and the substructure B supporting the bridge A. A bearing C that can move horizontally in anticipation of the length of the horizontal movement in response to horizontal movement due to expansion and contraction due to cold and warmth or an earthquake is installed in an appropriate place. Since these already installed bearings (hereinafter referred to as existing bearings) C have been passed for many years from the time of construction of the bridge A, damages due to distortion or bending stress due to the load or vibration from the bridge A, rainwater, Deterioration due to factors such as corrosion due to dust and the like often reduces or stops the load absorbing function. If the deteriorated existing bearing C is left as it is, each load acting on the bridge A cannot be absorbed by the existing bearing C, so that the bridge A itself frequently cracks or breaks, and the bridge A is broken. Therefore, there is a need for replacing the deteriorated existing bearing C with a new one.

Conventionally, as a method of replacing the existing bearings C, as shown in FIG.
A hydraulic jack E that can be lifted while supporting the bridge A (hereinafter referred to as “lifting”) by stacking a metal plate or a steel sandal having a height substantially equal to the height of the bridge A as a temporary receiving member D. Installed near the support C, jack up until the existing support C and the bridge A are almost separated (several mm to 1 cm)
Then, the bridge A is temporarily received by the temporary support F which is stacked on a metal plate and the like, the existing support C is removed in that state, a new support is installed, and then the bridge A is again mounted with the ordinary jack E. The temporary supporter F was removed by temporarily jacking up from the temporary receiving position, and the bearing C was replaced by jacking down. In addition to the above-described method of replacing the bearing C, there are known methods such as a bracket method and a special gantry method depending on various conditions under which the bearing C is mounted.

[0004] In these methods, the bridge cannot be lifted smoothly, and it is necessary to install a temporary receiving member D for lifting the bridge. However, the burden on the worker is heavy and dangerous, which may cause an accident. Therefore,
The inventor of the present invention has invented a method of lifting a bridge or the like and a device used for lifting the bridge A safely and easily, and has disclosed in Japanese Patent Publication No. 4-540002 and U.S. Pat. No. 4,944,492.
And is currently being implemented. As shown in FIGS. 17 (I) to (III), a wedge-shaped driving member 201 having inclined surfaces on upper and lower surfaces is connected to two wedge-shaped pressure receiving members 202, which are related to the push-pull means 200, near the existing support C. 2
1 by pressing the wedge-shaped drive member 201 in the length direction with the hydraulic jack device 204.
As shown in FIG. 7 (II), the wedge-shaped driving member 201 moves upward with sliding on the inclined surface of the lower wedge-shaped pressure receiving member 203, and moves upward with sliding on the inclined surface of the wedge-shaped driving member 201. The wedge-shaped pressure receiving member 202 moves upward to lift the bridge A. Then, in order to maintain this state, a horseshoe-shaped plate-like member is placed in a space between the reaction force receiving plate 205 of the hydraulic jack device 204 and the wedge-shaped driving member 201 from above with the sliding rod 206 of the jack device 204 therebetween. A considerable number of stopper members 207 are fitted into the space, and the reaction force receiving plate 2
05 and the wedge-shaped drive member 201 are filled to temporarily restrict the movement of the wedge-shaped drive member 201.
After the repair or replacement work is performed, a new bearing C '(not shown) is installed. After the work is completed, the wedge-shaped drive member 201 is pulled out in the length direction as shown in FIG. The repair or replacement work was completed. During the repair or replacement work of the existing bearing C, various fluctuation loads are applied to the bridge A due to the traffic of the vehicle and the like, causing displacement and vibration. However, these are caused by the upper wedge-shaped pressure receiving member 202 and the bridge A. Slide plate 2 interposed between the lower surface of
08 and a buffer plate (not shown). With this method and apparatus, repair or replacement work of the existing bearing C, which was conventionally dangerous or impossible, can be performed safely and easily in a short time, and praise from civil engineering and construction related fields. Have been.

[0005]

SUMMARY OF THE INVENTION It seems as if the previously-invented lifting method and apparatus could solve all the repair and replacement work of the existing bearing. However, the above-described method and apparatus have been successful because they can lift the bridge safely and smoothly.
After installing the 07, the hydraulic jack device 204 which is no longer required must be kept attached, which is extremely uneconomical.

In addition, the existing bearing C at the actual work site
There are various locations and unexpected situations exist. Among these existing bearings C, there is a case where there is no work space for repairing or replacing the existing bearings C. The reason is that at the beginning of construction of bridge A, after installing the existing support C, bridge A will be built on top of it. Therefore, it is necessary to provide sufficient work space such as removal near the existing support C. For example, as shown in FIG. 18, in the case of an existing support C provided on a follow slam bridge or the like, work for removing the existing support C near the existing support C, especially on the upper side of the substructure, is considered. There is a case where the existing bearing C cannot be removed because there is almost no space. In addition, due to the deterioration of the existing bearing C or the lack of buckling, etc., the bridge A is installed from the reference position of this place to the substructure B side. Sinking caused the gap between the substructure B and the bridge A to become extremely narrow, and there were cases where there was only a narrow space that could not even touch the existing support C as well as the working space. In particular, in a concrete bridge, the problem is more serious because the gap between the lower surface of the bridge A and the upper surface of the substructure B is designed to be narrow.

That is, in the lifting method and apparatus invented earlier, the lifting apparatus having a small vertical dimension is inserted into the gap between the bridge A and the substructure B to lift the bridge A safely and smoothly. It is superior to the well-known construction method in that it can be supported by the conventional construction method. However, while the bridge A is lifted and supported, repair and replacement work of the existing bearing C is performed while the bridge A is being lifted. Common problems are inherent. That is, in order to repair or replace the existing support C, at least a work space S is necessary as shown by a dotted line in FIG. 19, and the repair or replacement work of the existing support C in the above-described case is performed by removing the existing support C. Since there is no work space S, it is physically impossible. Of course,
Instead of simply replacing the existing bearing C, it is necessary to return the height of the sunk bridge A to the position of the place where the bridge A is installed. However, if the existing bearing C is left as it is, a catastrophic failure in which the bridge A itself collapses with the collapse of the existing bearing C may occur, so the temporary receiving member D shown in FIG. There is no alternative but to replace the existing bearing C by the conventional method to be used, or lift the bridge A itself with a large crane to replace the existing bearing C, or rebuild the bridge A with the substructure B anew. Was.

Accordingly, the present applicant has further studied and discarded the idea of the conventional method of lifting the bridge A and repairing or removing the existing bearing C and replacing it with a new bearing, and replacing the existing bearing C. Even if there is no work space, it is possible to install a new bearing, and the bearing itself has the function of lifting the bridge and can introduce the reaction force. The idea was changed to be able to withstand long-term use, and all the conventional problems were solved at once.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an object of the present invention is to provide an upper wedge-shaped pressure receiving member having an inclined surface on a lower surface, and a wedge-shaped drive provided on the upper surface with the inclined surface sliding on the inclined surface. And a driving means for moving the wedge-shaped driving member. The lifting member lifts a bridge or the like by sliding the two members on inclined surfaces of each other and raising the upper surface of the upper wedge-shaped pressure-receiving member with respect to the substructure. In the upper supporting method, the upper wedge-shaped pressure receiving
Member or wedge-shaped drive member
And a guide part sized to slide on the protrusion is provided on the other side.
After lifting a bridge or the like, the protrusions slide to
One or more stoppers are provided in the space formed in the
By inserting members and filling the space, the upper wedge-shaped pressure receiving
A lifting support method for a bridge or the like in which a member and a wedge-shaped drive member are restricted from moving with each other . In this case, it is preferable that after the upper wedge-shaped pressure receiving member and the wedge-shaped driving member are restricted from moving, the driving means is removed.

Here, the upper wedge-shaped pressure receiving member or the wedge-shaped drive
Insert the stopper member into the guide from the side of the moving member.
It is preferable that the movement of both members can be restricted.
No.

As a driving means for moving the wedge-shaped driving member, a hydraulic center hole jack is used, and the tip of a sliding rod penetrating the jack is detachably connected to the wedge-shaped driving member, and the other end is connected. It is a preferred embodiment to be linked to the drive of the jack.

Further, a plate-like shoe is interposed between the upper wedge-shaped pressure-receiving member and an upper shoe provided on the lower surface of the bridge or the like, and a contact surface between the upper shoe and the plate-like shoe slides, whereby a bridge is formed. It is practical to absorb the change due to vibration or expansion and contraction, etc. sufficiently above the substructure.

An upper wedge-shaped pressure-receiving member having an inclined surface formed on the lower surface thereof, and a slidable surface of the upper wedge-shaped pressure-receiving member for practical use as a bearing device for a bridge or the like using the above-described lifting support method. A wedge-shaped driving member having a movable inclined surface having the same inclination angle formed on the upper surface and capable of being pushed and pulled in a longitudinal direction; and one of the upper wedge-shaped pressure-receiving member or the wedge-shaped driving member has both side walls, Except for a portion including at least a ridge line between the side wall and the inclined surface, a guide portion is formed in the length direction,
An engaging portion provided on the other member with a sliding protrusion having a size movable only in the length direction with respect to the guide portion; and the engaging portion formed after moving in the length direction of the sliding protrusion. A support device for a bridge or the like, comprising a stopper member to be fitted into the space portion of the guide portion;

Here, in the bearing device of the present invention, it is preferable that a plate-like shoe made of hard rubber or the like is mounted on the upper part of the upper wedge-shaped pressure receiving member, and further formed on the upper surface of the upper wedge-shaped pressure receiving member. It is more preferable that the lower part of the plate-like shoe made of hard rubber or the like is fitted and mounted in the recess, and the upper shoe attached to the lower surface of the bridge or the like is slidably mounted on the plate-like shoe. It is an example. It is practical that a slide layer having a small sliding friction resistance is formed on at least the upper surface of the plate-like shoe.

Further, a base plate provided with a sliding surface for the wedge-shaped driving member on the upper surface and a position regulating member capable of moving the wedge-shaped driving member only in the longitudinal direction is laid below the wedge-shaped driving member. At the same time, it is extremely practical to be fixed to a substructure such as a bridge.

As a means for moving the wedge-shaped drive member, a hydraulic center hole jack is used. The tip of a sliding rod penetrating the jack is detachably connected to the wedge-shaped drive member, and the other end is jacked. It is an important configuration to provide an inexpensive bearing device in cooperation with the drive unit and to be removable after lifting a bridge or the like.

[0017]

In the lifting support method for a bridge or the like and the bearing device according to the present invention configured as described above, the inclined surfaces of the wedge-shaped driving member and the upper wedge-shaped pressure receiving member are respectively provided on the upper surface of the lower part near the existing bearing. The wedge-shaped driving member and the upper wedge-shaped pressure-receiving member are relatively moved in the length direction along the inclined surface, so that the upper surface of the upper wedge-shaped pressure-receiving member is raised to lift a bridge or the like. After lifting and lifting, the upper wedge-shaped pressure receiving member and the wedge-shaped drive member are restricted from moving with each other. Here, as the movement restricting means, there are a protrusion, a guide part, and a stopper.
Adopting engaging means consisting of a par member , prior to lifting,
A projection provided on one of the upper wedge-shaped pressure receiving member and the wedge-shaped driving member is inserted into a projection provided on the other member, and the projection is positioned on the base end side of the guide in the longitudinal direction. The wedge-shaped pressure receiving member is placed on top. Then, after lifting the bridge or the like, the upper wedge-shaped pressure receiving member and the wedge-shaped drive member are restricted from moving with each other by the stopper member.
Maintain a stable lifting support for a long time,
Therefore, it can be used as it is as a bearing device. When the existing bearing and the bearing device of the present invention are used together, the load of the existing bearing, whose function has been reduced due to the introduction of a reaction force of a bridge or the like into the bearing device of the present invention, is reduced . Of course, in the present invention, in order to replace the existing bearing, it is also possible to lift and support the bridge or the like for a short period of time, lift the bridge after replacing the existing bearing with a new bearing, and support the bridge or the like with the new bearing.

If the wedge-shaped drive member is difficult to slide due to a large frictional resistance of the lower construction upper surface such as a concrete surface, a slide surface is formed on the upper surface so that the wedge-shaped drive member can be moved only in the length direction. The wedge-shaped drive member can be moved by interposing a base plate having the above configuration and fixing the base plate to the substructure. Next, in order to move the wedge-shaped drive member in the longitudinal direction, the tip of the sliding rod penetrating the hydraulic center hole jack is fixed to the wedge-shaped drive member from the front side, and the other end is driven by the jack body. When the sliding rod is pulled in with a reaction force receiving member interposed between the jack body and the front surface of the upper wedge-shaped pressure-receiving member or the front surface of the base plate, the wedge-shaped driving member moves in the longitudinal direction together with the rod. The upper wedge-shaped pressure receiving member rises with sliding between the inclined surface of the wedge-shaped driving member and the inclined surface of the upper wedge-shaped pressure receiving member, and lifts a bridge or the like. At this time, when the protrusion slides on the guide portion, a space from the initial position of the protrusion to the position where the protrusion slides is formed. Then, at the time of lifting to an appropriate position, the lifting force of the bridge or the like is stopped while maintaining the retraction force, and a stopper member is embedded in the space portion, whereby the space portion is filled with a stopper member, The return of the wedge-shaped drive member is completely prevented. After this,
Even if the jack is detached from the wedge-shaped driving member and removed, the lifting position of the bridge or the like is constantly maintained without lowering even if the bridge or the like is displaced by vibration or expansion and contraction by the stopper member, and the remaining member is retained. Is used as a bearing device.

A lower portion of a plate-like shoe made of hard rubber or the like is fitted and mounted in a recess formed on the upper surface of the upper wedge-shaped pressure receiving member, and the upper shoe attached to the lower surface of a bridge or the like is attached to the plate-like shoe. If it is slidably mounted, sediment will accumulate on the substructure during long-term use, and the sediment will bury the base plate and wedge-shaped drive member, making it impossible to move between them. However, it is possible to absorb the vibration and expansion and contraction generated in the bridge and the like by the plate-shaped shoe and the upper shoe located above the upper wedge-shaped pressure-receiving member that are less likely to be buried with the sediment.

[0020]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
1 and 2 are conceptual diagrams showing the technical concept of the present invention. In the figure, reference numeral 101 denotes an upper wedge-shaped pressure receiving member having an inclined surface 102 on a lower surface, and reference numeral 103 denotes a wedge-shaped driving member having an inclined surface 104 sliding on the inclined surface 102 on the upper surface. Then, the heavy structure such as a bridge is lifted by moving the wedge-shaped drive member 103 in a direction along the inclined surfaces while the two inclined surfaces 102 and 104 are joined. Here, as shown in FIG. 17, a bridge or the like is lifted by using a wedge-shaped drive member having these inclined surfaces, and movement of only the wedge-shaped drive member 201 corresponding to the wedge-shaped drive member 103 of the present invention is restricted. Was known. However, in the related art, each load applied to the reaction force receiving member is affected by the mounting strength of the reaction force receiving member, and cannot withstand the amount of flexure, so that long-term use is dangerous. Therefore, in the present invention, the upper wedge-shaped pressure receiving member 101 and the wedge-shaped driving member 103 are moved relative to each other to regulate the movement thereof and integrate the two members, so that the load acting in the direction along the inclined surface is canceled by the two members. In addition, it has become possible to regulate safely even for long-term use. In addition, the upper surface of the upper wedge-shaped pressure receiving member 101 and the lower surface of the wedge-shaped driving member 103 are slidable, so that not only short-term lifting support but also long-term support can be realized.

Upper wedge-shaped pressure receiving member 101 and wedge-shaped drive member 1
As a means for restricting the movement of the upper wedge-shaped member 03, one of the upper wedge-shaped pressure receiving member 101 and the wedge-shaped driving member 103 is provided with a protrusion 105 toward the other member, and the other is large enough to slide the protrusion 105. The guide portion 106 is formed. For example, in the case of FIG. 1, a projection 105 is provided below the upper wedge-shaped pressure receiving member 101, and a guide 106 is provided on the wedge-shaped driving member 103 so that the projection 105 can slide.
Then, the wedge-shaped driving member 103 and the upper wedge-shaped pressure receiving member 1
By pushing or retracting one or both of them with a well-known hydraulic jack device or the like, the protrusion 105 slides on the guide 106 as shown in FIG. This protrusion 1
As a result, the space 107 is formed from the initial position of the protrusion 105 to the position after the protrusion, and the space 107 is formed of a metal, a polymer resin, or the like. One or a plurality of stopper members 108 made of a material that is extremely difficult to deform or a material that can recover the original shape such as a shape memory alloy are inserted, and the space 107 is filled to stop detent. Further, when the movement is restricted to each other as in the present invention, the compressive force against the stopper member 108 is buffered, so that even a wood material which has been subjected to anti-corrosion treatment can be used as the stopper member 108 in some cases. is there.

Further, as shown in FIG.
08 to the upper wedge-shaped pressure receiving member 101 or the wedge-shaped drive member 103
By allowing the movement of both members to be restricted by inserting from the side wall direction, if at least the upper wedge-shaped pressure receiving member 101 and the wedge-shaped driving member 103 have a height that can be installed between the substructure and the bridge. The work space S is not required for the operation of inserting the stopper member 108.

Next, a bearing device for a bridge or the like directly using the above method will be described with reference to the drawings. FIG. 3 is an exploded perspective view of one embodiment of the bearing device of the present invention, and FIG. 4 is a longitudinal sectional view at the center thereof. In the figure, reference numeral 1 denotes an upper wedge-shaped pressure receiving member,
The upper wedge-shaped pressure receiving member 1 is made of a lightweight and hard material such as a polymer resin material or titanium, the upper surface is made horizontal, and the lower surface is formed by gradually changing the thickness in the length direction (sliding direction).
Are formed in a plane rectangular shape. At the center between both side walls along the length direction of the inclined surface 2, a groove portion 3 whose bottom surface is parallel to the upper surface and which is opened downward while leaving the same thickness in the longitudinal section is formed over the entire length. In addition, the sliding wedge 4 having a rectangular cross section is provided at the tip of the upper wedge-shaped pressure receiving member 1 on the front side of the side wall excluding both ends thereof, in the example shown in FIG. It is installed below. The sliding projection 4 may be formed integrally with the upper wedge-shaped pressure receiving member 1, but a separately formed sliding projection 4 as shown in the figure is integrated with the upper wedge-shaped pressure receiving member 1 with bolts or the like. May be fixed.

In this embodiment, the upper wedge-shaped pressure receiving member 1 is made of a special fiber laminate impregnated with a phenol resin. This laminate, a substrate made of woven fabric of special fibers, phenol and formaldehyde and a special additive are stirred in a reaction vessel, impregnated with a resin liquid reacted, dried, cut into predetermined dimensions, It is a block body manufactured by laminating them and subjecting them to pressure treatment with a molding press. Then, after the block body is machined into a predetermined shape, the sliding surface is subjected to paraffin processing to produce the upper wedge-shaped pressure-receiving member 1. Here, the physical properties of the material are a specific gravity of 1.39 and a hardness of 98 HRM. The mechanical properties of the material are such that the compressive strength is 25.3 kg in the laminating direction (hereinafter referred to as the vertical direction).
f / mm ² and a direction along the fabric (hereinafter, referred to as horizontal) 14.9kgf / mm ^2, in strength of 13.0kgf / mm ² in the horizontal direction vertically bending 14.3Kgf /
mm ² , impact value is 45.2 kgf · cm / c in vertical direction
m ² in the horizontal direction, which is 24.9 kgf · cm / cm ² , and the wear amount is 0.02 mm / hr (provided that the pressure P = 60
kg / cm ² , sliding speed V = 1 m / s). Note that these characteristic values are obtained when the temperature is 20 ° C.

In the figure, reference numeral 5 denotes a wedge-shaped driving member. The wedge-shaped driving member 5 is made of the same material as that of the upper wedge-shaped pressure receiving member 1, and is slidable on the inclined surface 2 of the upper wedge-shaped pressure receiving member 1. An inclined surface 6 having the same inclination angle to be placed is formed on the upper surface, and the lower surface is horizontally formed in a flat rectangular shape and can be moved in the length direction. At the center between both side walls along the length direction of the inclined surface 6 of the wedge-shaped drive member 5, the groove 3 is substantially provided, the upper edge is parallel to the lower surface, and the height from the lower surface in the vertical cross section is higher. The same protruding ridge 7 protrudes upward over the entire length, and a through hole for fixing a sliding rod of a hydraulic center hole jack described later is formed substantially at the center of the protruding ridge 7 in the longitudinal direction. Alternatively, a mounting hole 8 such as a screw hole is opened. Further, on both side walls of the wedge-shaped driving member 5 near the front surface excluding the both ends, and in the illustrated example, near the thinner side, a portion including at least a ridge line between the side wall and the inclined surface 6 is cut out to guide the guide portion 9. It is formed in the length direction. The guide portion 9 may be a bottomed groove which is not a through groove opened vertically as shown in the figure. The slide protrusion 4 is inserted into the guide portion 9 and the slide protrusion 4 is As long as it can be moved in the length direction of the guide section 9, it can be adopted. As in this embodiment, the guide portion 9 is cut out at least including the ridge line between the side wall and the inclined surface 6.
Is formed, even if the upper wedge-shaped pressure receiving member 1 and the wedge-shaped driving member 5 are in a joined state, the positional relationship between the guide portion 9 and the sliding protrusion 4 is visually observed from the side wall direction of the wedge-shaped driving member 5. You can check.

The engaging portion 10 is constituted by the sliding protrusion 4 and the guide portion 9. The specific size relationship between the two is shown in FIGS. 5 and 6, and FIG. The engaging part 1
FIG. 6 is a partial longitudinal sectional end view as viewed from the length direction, and FIG. 6 is a partial side view as viewed from the side wall direction. That is, the width t of the sliding protrusion 4 is such that the width t is opposed to the inside of the guide portion 9 in a state where the long side wall 11 in the guide 9 and the inner side wall 12 of the sliding protrusion 4 are joined. Any thickness may be used as long as the width of the short side wall 13 is not more than twice the width t ₁ , but it is desirable that the relationship of t ≦ t ₁ is taken into consideration in consideration of safety. On the other hand, regarding the length relationship between the sliding protrusion 4 and the guide portion 9, as shown in FIG. 6, the length L ₁ of the long side wall 11 is longer than the length L of the sliding protrusion 4. , is where the sliding projections 4 is naturally requested by be located in the guide portion 9, but is movable if such a relationship, projections 4 from the length L ₁ of the long side side wall 11
The allowable range of the movement distance of the projection 4 is determined by the length obtained by subtracting the length L of the projection 4. However, this travel distance is
In consideration of the length of the upper wedge-shaped pressure receiving member 1 or the wedge-shaped driving member 5 and the inclination angles of the inclined surfaces 2 and 6, the height can be appropriately set so that a necessary lifting height can be secured.

The sliding projection 4 and the guide portion 9 set as described above act as shown in FIGS. 1 and 2, and after the stopper member 14 is fitted into the space portion 15, the stopper member 14 In order to prevent the 14 from coming off, FIG.
It is desirable to cover the stopper member 14 with a cover indicated as. The reason is that the stopper member 1
Even after the tension driving force applied to the wedge-shaped driving member 5 is removed after the fitting of the wedge-shaped member 4, the static frictional resistance between the inclined surfaces 2 and 6 is usually large. The pressure-receiving member 1 and the wedge-shaped driving member 5 do not move with each other, and a horizontal load is applied due to vibration and expansion and contraction of the bridge, so that the sliding protrusion 4 moves in the direction opposite to the moving direction at the time of lifting to the guide 9. To move relatively to the stopper member 14.
This is because the stopper member 14 easily comes off to the side until a compressive load acts on the stopper member 14. Once a compressive load is applied to the stopper member 14 by the sliding projection 4 naturally or artificially, it is difficult to predict that the stopper member 14 will come off to the side, but if the cover 16 is provided, it is safe It is.

In the figure, reference numeral 17 denotes a base plate.
7 is provided with a sliding surface 18 with the wedge-shaped driving member 5 on the upper surface, and a position regulating member 19 protruding on both sides of the sliding surface 18 so that the wedge-shaped driving member 5 can be moved only in the longitudinal direction. is there. The base plate 17 is used to reduce the frictional resistance between the wedge-shaped drive member 5 and the installation surface of the substructure. For example, the base plate 17 is made of a stainless steel plate having a low frictional resistance, or another metal plate or a hard resin plate. A material obtained by polishing only the sliding surface 18 or a material subjected to equivalent processing is used. Further, the position restricting member 19 can be achieved by fixing parallel plate members having an interval substantially equal to the width of the wedge-shaped driving member 5 to the sliding surface 18 as shown in the figure. The position restricting member 19 only needs to be capable of restricting the movement of the wedge-shaped drive member 5 in the longitudinal direction.
A concave groove or a convex groove may be formed in the length direction of the lower surface, and a convex line or a concave groove fitted to the concave groove or the like may be formed on the base plate 17. The base plate 17 is connected to the wedge-shaped driving member 5.
And is fixed to a substructure such as a bridge by well-known fixing means such as a bolt.
Considering the case where there is no work space above the fixed plate 20, as shown in FIG.
If the base plate 17 is fixed, the base plate 17 can be fixed by fixing the fixing plate 20 to the lower side wall surface. Depending on the gap between the lower work upper surface and the bridge lower surface, a well-known means such as interposing a plate material for height adjustment between the lower work upper surface and the base plate 17 or cutting the lower work upper surface. Thus, the position of the base plate 17 can be adjusted.

In the drawing, reference numeral 21 denotes a plate-like shoe which is the most important component of the bearing device. The plate-like shoe 21 is mounted on the upper part of the upper wedge-shaped pressure receiving member 1 and is hard rubber. And so on. The shoe 21 may be a shoe conventionally used as a shoe, for example, a roller-type shoe may be placed in addition to the plate-like shoe 21 in the illustrated example. Since the case is assumed, the plate-shaped shoe 21 is suitable because it does not require a large height. Further, in some cases, a plate material having good slidability such as a stainless steel plate or an ethylene tetrafluoride resin (PTFE) is interposed on a joint surface between the plate-like shoe 21 and the upper wedge-shaped pressure-receiving member 1 so that the plate-like shoe 21 itself can be attached. Sliding can be considered, and this embodiment will be described later.

FIGS. 8 to 11 show examples of the use of the bearing device of the present invention configured as described above. First, the base plate 17 is fixed to the substructure B on the upper surface of the substructure B near the existing support by a known means such as a bolt. At this time, if the upper surface of the lower surface B is not horizontal, the upper surface of the base plate 17 is fixed horizontally by interposing a plate material (not shown) between the base plate 17 and the lower surface B. Next, the wedge-shaped driving member 5 is placed between the position regulating members 19, 19 above the sliding surface 18 of the base plate 17. In this embodiment, since a hydraulic center hole jack is used as a moving means of the wedge-shaped driving member 5, the mounting work is easy if one end of the sliding rod of the center hole jack is fixed to the wedge-shaped driving member 5 in advance. Becomes Then, the upper wedge-shaped pressure-receiving member 1 is placed on the guide portion 9 of the wedge-shaped driving member 5 while the sliding projection 4 of the upper wedge-shaped pressure-receiving member 1 is inserted thereinto.
6 are polymerized. Of course, at this time, the ridge 7 and the groove 3 are also fitted, and the upper wedge-shaped pressure receiving member 1 is restricted from moving in the width direction.
Further, the plate-shaped shoe 21 is placed on the upper part of the upper wedge-shaped pressure receiving member 1. These series of operations may be performed sequentially or at a time in a state of being stacked in advance. In this initial setting state,
Both the upper wedge-shaped pressure receiving member 1 and the wedge-shaped drive member 5 are shifted so that the height of the first wedge-shaped member 1 is minimized, and the thin portions of the two members are overlapped with each other. This state is shown in FIG. In this initial setting state, the upper edge of the ridge 7 and the bottom surface of the groove 3 are in the state where the gap is the narrowest or the state where they are in contact with each other. Since the gap is shifted in a direction to increase, the load does not concentrate on this portion.

Next, one end of the sliding rod 22 of the hydraulic center hole jack is fixed from the front side of the wedge-shaped driving member 5 using the mounting hole 8, and the jack body 23 is connected to the front surface of the base plate 17 and the upper wedge-shaped pressure receiving member. The reaction force receiving member 24 having the through-hole through which the sliding rod 22 can be inserted through the front surface of the member 1 is abutted instead of the jack body 23, and the reaction force receiving member 24 and the jack body 23 Then, the sliding rod 22 is passed through the jack body 23, and the hydraulic center hole jack is mounted with the detent nut 25 or the like. This state is shown in FIG.

When the jack is driven, the sliding rod 22 is moved rightward in the drawing, and in conjunction with this, the wedge-shaped driving member 5 slides on the sliding surface 18 of the base plate 17 and moves toward the jack. , The upper wedge-shaped pressure receiving member 1 starts to rise with the inclination of the inclined surface 6 of the wedge-shaped driving member 5 and the inclined surface 2 of the upper wedge-shaped pressure receiving member 1. Eventually, the upper plate-like shoe 21 of the upper wedge-shaped pressure receiving member 1 comes into contact with the lower surface of a bridge or the like,
Further, the bridge and the like are lifted. At this time, the guide 9
When the protrusion 4 slides, a space 15 is formed from the initial position of the protrusion to the position where the protrusion slides, and this state is shown in FIG.

Further, when the bridge or the like is lifted to an appropriate position and the jacking force is adjusted to stop the lifting, the detent nut 25 is tightened to temporarily restrict the return of the rod 22. Alternatively, while the jacking force is kept constant, the space 15 in the guide portion 9 is filled with one or a plurality of stopper members 14 to completely stop the sliding projection 4 from returning. This state is shown in FIG.

Even after the lifting force is maintained, even if the jack force is reduced to zero, the upper wedge-shaped pressure receiving member 1 and the wedge-shaped drive member are usually used only with a static vertical load acting on the device from a bridge or the like. The members 5 do not move with each other, but when a horizontal load is applied due to vibration, expansion and contraction, and the like of the bridge, the sliding protrusion 4 tries to move in the opposite direction to the above, but the stopper member 14 Because the movement is restricted and it is not possible to return, the lifting position of the bridge etc. is maintained without lowering. In addition, the stopper member 14 is compressed by this load and does not come off. Finally, if the jack is cut off in relation to the wedge-shaped drive member 5 in the reverse order, only this device remains, and is then used as it is as a bearing device. It should be noted that the above-mentioned driving means is not limited to the center hole jack device, but may be a general hydraulic jack device or other driving means capable of moving the upper wedge-shaped pressure receiving member 1 or the wedge-shaped driving member 5 in the length direction. Of course, it can be used.

Next, a second embodiment of the present invention will be described with reference to FIGS.
4, the basic configuration of this embodiment is the same as that of the above-described embodiment, and the same components are denoted by the same reference numerals and detailed description thereof will be omitted. The feature of the present embodiment is that the seismic performance is improved so that the bearing device can withstand long-term use as a bearing device, and the horizontal wedge between the upper wedge-shaped pressure receiving member 1 and the lower surface of the bridge A, which is less affected by the sedimentary sediment. It is possible to move.

The upper wedge-shaped pressure-receiving member 1 forms a concave portion 26 with its periphery left on the upper surface so that the lower portion of the plate-like shoe 21 can be fitted into the concave portion 26 without lateral displacement. A metal reinforcing member 27 is attached to the end surface of the thick portion of the member including the end portion where the reaction force receiving member 24 is pressed.
Is buried. Here, the plate-like shoe 21 is a rubber pad 28 in which a stainless steel reinforcing material is embedded in a chloroprene rubber base material conventionally used as a rubber bearing for a bridge.
Using PTFE on the upper surface to improve the sliding property.
The slide layer 29 is formed.

The wedge-shaped driving member 5 has a mounting hole 8 formed inside the projection 7 and penetrating from a thin portion to a thick portion of the member, and a square receiving nut 30 at an end of the thick portion. And the sliding rod 2 inserted into the mounting hole 8 from the thin portion side
The tip of 2 is screwed to the nut 30 for attachment. On both sides of the lower surface of the wedge-shaped driving member 5, concave grooves 31, 31 are formed over the entire length in parallel with the ridges 7.

The base plate 17 is provided at a position corresponding to the grooves 31 on the sliding surface 18 on the upper surface.
A pair of long parallel projections 32, 32 fitted to 31 are fixed, and the fixed plate 20 is fixed to the lower surface on the front side with an edge margin substantially equal to the thickness. The concave groove 31 and the convex portion 3
Reference numeral 2 is provided to restrict the lateral movement and twisting of the wedge-shaped drive member 5 with respect to the base plate 17 and to enable the wedge-shaped drive member 5 to smoothly move back and forth. On the rear surface side of the base plate 17, that is, on the edge opposite to the fixed plate 20, a stop piece 33 is projected upward to prevent the wedge-shaped drive member 5 from falling back. Further, on both sides of the sliding surface 18 of the base plate 17 and near the front side, position regulating members 19 are provided.
After the bridge A is lifted as described above and the stopper members 14,... Are inserted into the guide portion 9, the position regulating members 19, 19 are attached to the base plate 17 as described above.
, The lateral movement of the wedge-shaped drive member 5 is surely restricted, and the seismic resistance is improved. At the same time, the stopper members 14,. is there. Adjusters 34,... Are provided at the front and rear portions on both side edges of the base plate 17 for leveling the base plate 17.

Further, the reaction force receiving member 24 of the present embodiment is engaged with the lower edge of the flat surface of the upper wedge-shaped pressure receiving member 1 which is in contact with the reinforcing member 27 and below the front edge 36 of the base plate 17. A projecting edge 37 is formed to prevent the reaction force receiving device 24 from being unexpectedly lifted. Also, after lifting, the fixing plate 20 is attached to the corresponding portion of the base plate 17 from which the reaction force receiving member 24 has been removed, so that the fixing member 38 can be attached to the corresponding fixing plate 33 by bolts. Are formed at predetermined positions.

Then, as shown in FIG.
7 is partially removed in advance by a rock drill or the like, and the level of the base plate 17 is adjusted by the adjusters 34,.
After that, the fixing plate 20 is fixed to the side wall surface of the substructure B using the anchor bolt 39, and then the base plate 1
Cement mortar 40 is cast on the lower surface of 7, etc., and base plate 17 is completely fixed to substructure B. Further, before placing the cement mortar 40, a reinforcing reinforcing bar is attached to an existing reinforcing bar by welding, if necessary. If the distance between the substructure B and the base plate 17 is larger than about 15 mm, a cement-based graft can be injected as described above. If the distance is smaller than that, a resin-based graft is injected.
On the other hand, on the bridge A, the upper shoe 41 having a high strength and a good sliding property, such as a stainless steel plate having a lower surface as a sliding surface, is fixed. When the upper shoe 41 is fixed, the lower surface of the bridge A is corrected for unevenness, and then fixed by an appropriate fixing means such as an anchor bolt. Thereafter, the wedge-shaped driving member 5, the upper wedge-shaped pressure-receiving member 1, and the plate-shaped shoe 2 are placed on the base plate 17 in the same manner as described above.
1, the sliding rod 22 is attached to the wedge-shaped driving member 5, and the sliding rod 22 is attached to a center hole jack (jack main body 23).

When the existing bearing is broken and the bridge A sinks below the designed value and the existing bearing cannot be removed, the bridge A is lifted by a predetermined height by the present device, and then the stopper member 1 is lifted.
4, the device is used as a new bearing device.
Alternatively, if the existing bearing is insufficient but has the function and the existing bearing cannot be removed, the bridge A
Lifting to the extent that the height does not change, introducing a reaction force, attaching the stopper member 14 in the same manner as described above, using this device as a new bearing device juxtaposed to the existing bearing, and acting on the existing bearing Share the load.

FIG. 14 shows a state where the present device is used as a bearing device. In this state, the stopper member 14 is attached to the guide portion 9 to regulate the relative movement between the upper wedge-shaped pressure receiving member 1 and the wedge-shaped driving member 5, and the position regulating member 1
9 and 19 are fixed to the side portions of the stopper members 14,... To restrict the lateral movement of the wedge-shaped drive member 5 and at the same time prevent the stopper member 14 from coming off. After the stopper member 14 is attached, the sliding rod 22 is removed, replaced with a shorter tension bar 42, one end of the tension bar 42 is screwed into the receiving nut 30, and the other end is inserted through the washer 43. Then, the upper wedge-shaped pressure receiving member 1 and the wedge-shaped drive member 5 are completely integrated. Further, the stop member 38 is attached to the fixing plate 20 so that the stop piece 3
3 prevents the wedge-shaped drive member 5 from moving back and forth with respect to the base plate 17 and protruding from the base plate 17. The horizontal displacement due to the vibration or expansion and contraction of the bridge A is absorbed by the sliding between the slide layer 29 of the plate-like shoe 21 and the lower surface of the upper shoe 41. Here, the sliding surface 18 of the base plate 17 and the wedge-shaped driving member 5
The lower surface of the upper surface is subjected to a surface treatment so that the wedge-shaped driving member 5 can be easily moved at the time of lifting, but the frictional resistance between the sliding layer 29 of the plate-like shoe 21 and the lower surface of the upper shoe 41 is smaller than that. If smaller, the wedge-shaped drive member 5 will not move with respect to the base plate 17. Therefore, the base plate 17 and the wedge-shaped drive member 5
Is not affected by the sediment.

[0043]

According to the present invention as described above, a new bearing device can be installed without removing the bridge itself, even if there is no work space enough to remove the existing bearing, and the existing bearing may be damaged. Even if it is lower than the bearing height set at the time of manufacturing the bridge, there is a remarkable effect that the height of the bridge can be restored to the original height designed at the time of manufacturing the bridge. In addition, since the bearing itself lifts the bridge and is installed as a new bearing device as it is, it can be replaced without stopping vehicles running on the bridge, etc. No regulation required.
Further, by using a wedge-shaped driving member having an inclined surface on one side, a height is not required as compared with a wedge-shaped driving member having an inclined surface on both surfaces, and the device is suitable for work in a narrow gap. Incidentally, depending on the size of the gap, a wedge-shaped driving member having inclined surfaces formed on both sides may be used.

Also, the wedge-shaped drive member, upper wedge-shaped pressure receiving member, base plate, hydraulic jack, etc. of the bearing device used in the present invention can be divided, and are not integrated like conventional existing bearings. Easy to assemble on site,
The work period can be shortened because the transportation work can be performed safely and easily even at a high work site. In addition, after lifting a bridge, etc., the hydraulic jack (drive means) can be removed and used in other construction sites in the same way, and the expensive hydraulic jack can be reused many times, resulting in significant cost Reduction can be achieved. In particular, when a hydraulic center hole jack is used, a sliding rod is passed through the jack, its tip is connected from the front side of the wedge-shaped drive member, and a detent nut is screwed into the other end to drive the jack. The wedge-shaped drive member is pulled up to the jack body side and lifted with the operation of the jack drive section by the linkage with the jack body, so that the jack body does not need to be fixed at all, so it is easy to remove and the jack body If the stroke is not enough,
By restoring the drive to its initial state and further screwing in the detent nut, the wedge-shaped drive can be attracted again. Therefore, the jack body can be made small and lightweight, and handling becomes easy.

When the movement of only the wedge-shaped driving member is restricted as in the prior art, the return restricting force of the wedge-shaped driving member is directly received by the reaction force receiving plate. Although it was necessary to prevent the return of the member and it was not suitable for long-term use, in the present invention, a stopper member is inserted into the space to allow self-contained movement control between the upper wedge-shaped pressure receiving member and the wedge-shaped drive member. Therefore, the reaction force receiving plate is not required and the structure is simplified, and a compressive load is applied to the stopper member. Therefore, if the material can withstand this load, the stopper member will not come off, It can be used.

Further, a lower portion of a plate-like shoe made of hard rubber or the like is fitted and mounted in a concave portion formed on an upper surface of the upper wedge-shaped pressure receiving member, and an upper shoe attached to a lower surface of a bridge or the like is attached to the plate-like shoe. If it is slidably mounted on the substructure, earth and sand will accumulate on the substructure, and even if the base plate or wedge-shaped drive member is buried in the sediment and movement between them is impossible, The plate-like shoe and the upper shoe located above the upper wedge-shaped pressure-receiving member, which are less likely to be buried, can absorb vibration and expansion and contraction generated in a bridge or the like, and can be used for a long time as a bearing device.
In addition, by providing a slide layer on at least the upper surface of the plate-shaped shoe, the sliding movement between the plate-shaped shoe and the upper shoe attached to a bridge or the like becomes smoother.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of a lifting support method according to the present invention.

FIG. 2 is a conceptual diagram of a lifting support method.

FIG. 3 is an exploded perspective view showing a first embodiment of the bearing device according to the present invention.

FIG. 4 is a central longitudinal sectional view showing one embodiment of the bearing device.

FIG. 5 is an end view showing a guide portion of the bearing device.

FIG. 6 is a side view showing a guide portion of the bearing device.

FIG. 7 is a perspective view showing another embodiment of the base plate.

FIG. 8 is a side view showing a state where a bearing device is installed between a substructure and a bridge.

FIG. 9 is a side view showing a state where a jack is mounted on the bearing device.

FIG. 10 is a side view showing a state where the bridge is lifted by the bearing device.

FIG. 11 is a side view showing a state in which the jack is removed from the bearing device and the bridge is lifted and supported.

FIG. 12 is an exploded perspective view showing a second embodiment of the bearing device of the present invention.

FIG. 13 is a side view showing a state in which a bearing device is installed between a substructure and a bridge and a jack is mounted, with a part broken away.

FIG. 14 is a side view showing a state where the bridge is lifted and supported by the bearing device.

FIG. 15 is a perspective view showing a use state of an existing bearing.

FIG. 16 is an explanatory diagram showing an example of a conventional method and apparatus.

FIG. 17 is a central longitudinal sectional view showing a conventional lifting support method and device, (I) is a state in which the lifting support device is installed at a predetermined position, (II) is a lifting state, and (III) is a lifting state. The lifting support is shown.

FIG. 18 is an explanatory diagram showing a work space state.

FIG. 19 is an explanatory diagram showing a work space state.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 Upper wedge-shaped pressure receiving member 2 Inclined surface 3 Groove portion 4 Sliding protrusion 5 Wedge-shaped drive member 6 Inclined surface 7 Ridge 8 Mounting hole 9 Guide portion 10 Engagement portion 11 Long side wall 12 Inner side wall 13 Short side wall 14 Stopper member 15 Space 16 Cover 17 Base plate 18 Sliding surface 19 Movement restricting member 20 Fixed plate 21 Plate-like shoe 22 Sliding rod 23 Jack body 24 Reaction force receiver 25 Detent nut 26 Depressed portion 27 Reinforcement member 28 Rubber pad 29 Slide layer 30 Receiving Nut 31 Groove 32 Convex part 33 Stop piece 34 Adjuster 36 Edge 37 Protrusion 38 Stop member 39 Anchor bolt 40 Cement mortar 41 Upper shoe 42 Tension bar 43 Washer 44 Nut 101 Upper wedge-shaped pressure receiving member 102 Slope 103 Wedge drive Member 104 Slope 105 Projection 106 Guide 10 Space portion 108 Stopper member 200 Push / pull means 201 Wedge-shaped drive member 203 Wedge-shaped pressure receiving member 203 Wedge-shaped pressure receiving member 204 Hydraulic jack device 205 Reaction force receiving plate 206 Sliding rod 207 Stopper member 208 Slide plate A Bridge B Substructure C Existing support S Work space

Claims (11)

(57) [Claims] An upper wedge-shaped pressure receiving member having an inclined surface on a lower surface, a wedge-shaped driving member provided on the upper surface with the inclined surface sliding on the inclined surface, and driving means for moving the wedge-shaped driving member. member is slid in the inclined surface of each other, in jacked supporting method for jack up the bridges and the like by raising the upper surface of the upper wedge-shaped pressure receiving member with respect to substructure, the upper wedge-shaped pressure receiving
Member or wedge-shaped drive member
And a guide part sized to slide on the protrusion is provided on the other side.
After lifting a bridge or the like, the protrusions slide to
One or more stoppers are provided in the space formed in the
By inserting members and filling the space, the upper wedge-shaped pressure receiving
That the member and the wedge-shaped drive member are restricted from moving with each other.
Jack up the supporting process of bridges or the like, characterized. 2. The method for lifting and supporting a bridge or the like according to claim 1, wherein said upper wedge-shaped pressure receiving member and said wedge-shaped driving member are restricted from moving with each other, and then said driving means is removed. 3. A stopper member is inserted into a guide portion from a side wall direction of the upper wedge-shaped pressure receiving member or the wedge-shaped drive member,
Jack up the supporting process of bridges or the like according to claim 1, wherein comprising enabling movement restriction of both members. 4. A hydraulic center hole jack is used as a driving means for moving the wedge-shaped driving member, and a distal end of a sliding rod penetrating the jack is detachably connected to the wedge-shaped driving member, and the other end is connected to the wedge-shaped driving member. 3. The method for lifting and supporting a bridge or the like according to claim 1 or 2, wherein the method is linked to a drive unit of a jack. 5. A bridge formed by interposing a plate-shaped shoe between the upper wedge-shaped pressure receiving member and an upper shoe provided on a lower surface of a bridge or the like and sliding a contact surface between the upper shoe and the plate-shaped shoe. 3. The lifting support method for a bridge or the like according to claim 1 or 2, wherein the displacement due to vibration or expansion and contraction is absorbed sufficiently above the substructure. 6. An upper wedge-shaped pressure receiving member having an inclined surface formed on a lower surface, and an inclined surface having the same inclination angle which slides on the inclined surface of the upper wedge-shaped pressure receiving member is formed on an upper surface, and can be pushed and pulled in a length direction. The wedge-shaped driving member and the upper wedge-shaped pressure receiving member or one of the wedge-shaped driving members are cut off at both sides and at least a portion including a ridge line between the side wall and the inclined surface except for both ends to extend the guide portion in the length direction. And an engaging portion provided on the other member with a sliding protrusion having a size movable only in the length direction with respect to the guide portion, and after moving in the length direction of the sliding protrusion. A support device for a bridge or the like, comprising: a stopper member that fits into a space of the formed guide portion. 7. The support device for a bridge or the like according to claim 6, wherein a plate-like shoe made of hard rubber or the like is mounted on the upper part of the upper wedge-shaped pressure receiving member. 8. A lower portion of a plate-like shoe made of hard rubber or the like is fitted and mounted in a recess formed on an upper surface of the upper wedge-shaped pressure receiving member, and an upper shoe attached to a lower surface of a bridge or the like is attached to the plate-like shoe. The bearing device for a bridge or the like according to claim 6 , wherein the bearing device is slidably mounted. 9. The support device for a bridge or the like according to claim 8, wherein a slide layer having a small sliding friction resistance is formed on at least an upper surface of said plate-like shoe. 10. A base plate having an upper surface provided with a sliding surface for the wedge-shaped drive member and a position regulating member capable of moving the wedge-shaped drive member only in the longitudinal direction is laid below the wedge-shaped drive member. The bearing device for a bridge or the like according to claim 6, wherein the bearing device is fixed to a substructure such as a bridge. 11. A hydraulic center hole jack is used as a means for moving the wedge-shaped drive member. The tip of a sliding rod penetrating the jack is detachably connected to the wedge-shaped drive member, and the other end is jacked. 7. The support device for a bridge or the like according to claim 6, wherein the bearing device is linked to the drive unit and can be removed after lifting the bridge or the like.