JPS5826442B2 - Bearing device with temporary support - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a support device used in a cantilever construction method for a bridge girder,
In particular, the present invention relates to a support device equipped with a temporary receiver having a height adjustment function.

Conventionally, in the cantilever erection construction method of a bridge girder, as shown in FIG. 1, the bridge girder G is manufactured in a block shape of several meters to several tens of meters on a manufacturing table provided behind the abutment B'.

Pier B has three components: a lower shoe, a movable body such as a bearing plate (support plate), a roller, or a pin placed on the lower shoe, and an upper shoe placed on the movable body. On the upper shoe of the supporting device C which is constructed and permanently supports the bridge girder G, a temporary support body on which a sliding material is arranged is removably temporarily fixed and arranged.

Thereafter, the bridge girder G was attached with a hand-stretched gutter A, loaded onto a temporary receiver on the support device C, and was attached directly to the bridge girder G or to the pier B as shown in Fig. 2. Using an extrusion device, the temporary receiver is slid on and pushed out to a predetermined position.

Then, when the extrusion is completed, the sole plate fixed in advance to the bridge girder G can be directly fixed to the upper shoe of the support device C by removing the temporary support, or alternatively, the temporary support can be replaced with a connecting body and fixed. It is taken.

However, the support devices used in this construction method and the temporary supports placed on them are subject to uneven heights of the support devices placed on multiple piers, as well as irregularities in the flatness of the lower surface of the bridge girder. Due to such reasons, during the extrusion erection of the bridge girder, the excessive load of the bridge girder acts intensively on the temporary supports and supporting devices, resulting in unevenness, which causes damage to the bridge piers. There is.

This will not be a problem if the heights of the supporting devices placed on multiple piers are the same and the flatness of the lower surface of the bridge girder is correct, but if the heights are the same and the flatness is correct. Getting it right is difficult in terms of construction or bridge girder manufacturing.

Therefore, if some of the bearing devices have uneven heights (or uneven flatness on the bottom surface of the bridge girder), the torsional rigidity of the bridge girder is high, and a load greater than the design load will act on the bearing device. The present invention, which causes the above-mentioned problems, was made to solve these problems.
A pot-shaped body with a recess formed in one end face, an inflatable rubber body tightly housed in the concave part of the pot-shaped body, and one end face abutting the rubber body and protruding from a part of the other end face. The inflatable rubber body has a cavity formed therein, and the cavity is provided with a connecting part that communicates with the outside, and the pot-shaped body has a concave part and a connecting part that communicates with the outside. A communication hole communicating with the outer surface of the pot-shaped body and connected to the connecting portion of the expandable rubber body is formed in the concave portion of the pot.

Then, the temporary receiver is made by contacting the other end surface of the pot-shaped body with the upper shoe and the protruding end surface of the pressure plate against the sliding support surface of the bridge girder, or by contacting the protruding end surface of the pressure plate with the upper shoe. The other end surface of the shaped body is used as a sliding support surface for the bridge girder, and is removably arranged on the upper shoe, and when the bridge girder is installed, the temporary supports are communicated with each other through a communication hole, and from the communication hole By injecting a fluid substance into the gap of the inflatable rubber body or discharging the injected fluid substance to expand and contract the inflatable rubber body, the temporary support body is made to have a jacking function, and the support device is This is a support device equipped with a temporary support having a height adjustment function that supports the bridge girder with a predetermined support reaction force.

To describe the aspect of the method of using this support device, as shown in Fig. 3, a support device S equipped with a temporary holder having the above-mentioned jacking function is placed on one pier B, and then unit, and connect the temporary supports on the support device S for each pier B with pipes F connected to pumps E, or as shown in FIG. The temporary receivers on the device S are divided into a certain range of piers B, or all of them are connected through a pipe F connected to a pump E, and the pump E injects a fluid substance into the expanding rubber body that produces the jacking function. or by discharging the injected fluid substance through a discharge pipe (not shown),
The height of the temporary receiver is adjusted while expanding or contracting the expandable rubber body.

Then, in this state, a valve H (or a check valve) provided on a pipe F connected to a pump E closes a certain portion of the temporary receiver on each support device S while keeping them in communication. This prevents an excessive load from acting on some of the supporting devices S even if the flatness of the lower surface of the bridge girder G becomes irregular.

In other words, since the temporary supports on the support devices S are in communication, an excessive force is applied to some of the support devices S due to the irregularity of the flatness of the lower surface of the bridge girder, and the height of the temporary supports is reduced. However, the pressure of the fluid substance in the inflatable rubber body is all the same, and each support device S is adjusted to support the reaction force according to the bearing pressure area of the inflatable rubber body. Bridge girders can be pushed out while preventing excessive loads from being applied.

Moreover, after the extrusion is completed, the sole plate integrally fixed to the upper shoe of the support device S and the bridge girder G can be fixed directly by removing the temporary support, or by replacing the temporary support with a connecting body. The bridge girder G is permanently supported as it is.

Hereinafter, embodiments of the support device of the present invention will be described in detail based on the drawings from FIG. 5 onwards.

Reference numeral 1 denotes a support device disposed on the bridge pier B to support the bridge girder G.

The support device 1 includes a lower shoe 2 fixed to a pier B, a movable body 3 disposed on the lower shoe 2 to release deflection and expansion/contraction of the bridge girder G after completion of extrusion, and a movable body 3 disposed on the movable body 3. It consists of an upper shoe 4.

Reference numeral 5 denotes a temporary support body which is detachably placed on the lower shoe 4 of the support device, and the temporary support body 5 is composed of a pot-shaped body 6, an inflatable rubber body 7, and a bearing pressure plate 8.

Reference numeral 9 denotes a concave curved surface provided on the upper surface of the lower shoe 2, and a bearing plate constituting the movable body 3 is disposed on the concave curved surface 9.

Reference numeral 10 denotes protrusions provided at both ends of the lower shoe 2 in the direction perpendicular to the bridge axis, and the protrusions 10 are formed to sandwich the concave curved surface 9 and protrude upward.

11 is a stepped portion provided at both ends of the upper shoe 4 in the direction perpendicular to the bridge axis;
Reference numeral 12 denotes locking holes provided at both ends of the upper shoe 4 in the bridge axis direction.

Each part of the temporary receiver 5 has the following configuration.

13 is a recess provided on one end surface (upper surface) of the pot-shaped body 6; 14 is a convex portion provided on both ends of the other end surface (lower surface) of the pot-shaped body 6 in the direction perpendicular to the bridge axis; The protruding stripes 14 are formed to fit on both ends of the upper surface of the upper shoe 4 in this direction.

Numerals 15 and 15 are bolts arranged on the protruding portion 14, and the bolts 15 temporarily fix the pot-shaped body 6 to the upper shoe 4 in a detachable manner.

Further, 16 is a fixing hole provided on the bottom surface of the recess 13 of the pot-shaped body, 17 is a communication hole between the fixing hole 16 and the outer surface of the pot-shaped body 6,
Communication holes each having an opening, 18 is the communication hole 17
This is a threaded portion provided in the opening on the outer surface side.

19 is a gap formed inside the inflatable rubber body 7; 20 is a connecting portion integrally provided on one end surface of the inflatable rubber body 7 with one end protruding from the end surface; An injection hole 21 communicating with the cavity 19 is provided in the hole 21 .

22 is a convex curved surface formed on the periphery of one end surface of the bearing pressure plate 8;
Reference numeral 23 denotes a sliding member fitted onto the other end surface of the bearing pressure plate 8.

24 is a sliding contact piece arranged between the bridge girder G and the bearing plate 8 of the temporary receiver, and 25 is a communicating hole screw portion 18 provided in the pot-shaped body 6 of the temporary receiver.
The pipe 25 communicates with each temporary receiver 5, and the other end is connected to a pump (not shown in the embodiment).

Reference numeral 26 denotes a fluid substance, and the fluid substance 26 is injected into the cavity 19 of the expandable rubber body constituting the temporary receiver 5 by a pump.

27 is an anchor bolt that fixes the lower shoe 2 to the pier B, 28
is fixed to the protrusion 10 of the lower shoe with a bolt or the like,
This is a hook-shaped side block that locks the stepped portion 11 of the upper shoe in the vertical direction.

29 is an anchor bolt 30 in advance when manufacturing the bridge girder G.
with a sole plate fixed to the sole plate 29.
is fixed at a position that matches the support device 1 after completion of extrusion, with its lower surface flush with the lower surface of the bridge girder G.

Reference numeral 31 denotes bolt holes formed at both ends of the lower surface of the sole plate 29 in the bridge axis direction, and the bolt holes 31 are connected to the locking holes 1 of the upper shoe.
It is set to match 2.

Reference numeral 32 denotes a connecting bolt hole provided on the lower surface of the sole plate 29 separately from the bolt hole 31.

Reference numeral 33 denotes a connecting body, and the connecting body 33 has through holes 34 at both ends in the bridge axis direction that match the bolt holes 31 of the sole plate and the locking holes 12 of the upper shoe, and at both ends of the lower surface in the direction perpendicular to the bridge axis. Engagement protrusions 35 are formed to fit on both ends of the upper surface of the upper shoe 4 in the direction.

Reference numeral 36 denotes an engagement hole provided in the connecting body 33 separately from the through hole 34, and the engagement hole 36 is formed to match the connection bolt hole 32 of the sole plate.

37 is a locking piece arranged between the upper and lower shoes 2 and 4;
Reference numeral 7 restricts the movement of the movable body 3 and the upper shoe 4 in the direction of the bridge axis during extrusion.

The temporary support device 1 of the present invention is assembled and configured as follows.

That is, a movable body 3, so-called a bearing plate, is arranged on the lower shoe 2, and an upper shoe 4 is arranged on the bearing plate, and a locking piece 37 is installed between the upper and lower shoes 2, 4 so that the bearing plate and the upper shoe 4 are bridges. Assemble so that it does not move in the axial direction.

After that, the temporary receiver 5 is temporarily fixed on the upper shoe 4, that is, the expansion rubber body 7 is placed in the recess 13 of the pot-shaped body, and the connecting portion 20 protruding from the rubber body 7 is inserted into the fixing hole 16 provided on the bottom of the recess. are fitted so that the injection hole 21 of the connection part and the communication hole 17 of the pot-shaped body match and are tightly housed.

Then, the bearing pressure plate 8 is brought into contact with the rubber body 7, which is an end surface having a convex curved surface 22 formed on the periphery thereof, so as to seal it, and the surface on which the sliding material 23 is arranged protrudes from the concave portion 13 of the pot-shaped body. It is constructed by fitting the protruding strips 14 of the pot-shaped body to both ends of the upper shoe 4 in the bridge axis direction, and temporarily fixing the temporary receiver 5 arranged in a removable manner by screwing bolts 15. Ru.

Hereinafter, a method for constructing the bridge girder G using the support device configured as described above will be described.

A plurality of supporting devices 1 are placed on a pier B with lower shoes 2 fixed with anchor bolts 27 without any restrictions.

(B) Next, the temporary receivers 5 of the supporting devices arranged on each pier B are inserted into the pot-like body communication hole 17 of the temporary receivers 5 for each pier (or for each pier in a certain range, or for all the piers). A pipe b connected to the pump is screwed onto the provided threaded portion 18 to connect the temporary receiver 5.

(C) In this state, the height of the temporary receptor 5 is adjusted by operating the pump.
6 through the pipe 25 and the communication hole 17 into the cavity 19 of the expanded rubber body from the connection injection hole 21, or by discharging the fluid substance 26 that has been injected.
The bearing pressure plate B is moved up and down by the expansion and contraction of the rubber body 7 to adjust its height.

(D) After the transfer, the valve (not shown in the embodiment diagram) disposed on the pipe 25 is closed while the temporary receiver 5 is kept in communication.

(E) In this state, load the bridge girder G manufactured behind the abutment onto the support device 1 via the sliding contact piece 24, and
The sliding material 2 arranged on the sliding contact piece 24 and the bearing plate 8 of the temporary receiver
3, the sole plate 29 is continuously pushed forward (in the direction of the arrow in the figure) to the vicinity where the sole plate 29, which has been fixed in advance to the bridge girder G, matches the predetermined support device 1.

(F) Then, when the sole plate 29 reaches a predetermined position, the connecting body 33 is attached to the sole plate 29 so that the engagement protrusion 35 of the connecting body fits into the side surface of the upper shoe 4 in the direction perpendicular to the bridge axis. The bolt disposed in the engagement hole 36 is screwed into the connection bolt hole 32 of the sole plate, thereby fixing the sole plate 29 and the connection member 33 together.

(G) Bolt 1 that fixed the temporary support 5 to the upper shoe 4 after being attached
5 is removed and the bridge girder G is pushed out again, thereby replacing the temporary receiver 5 and the connecting body 33 by pushing out the temporary receiver 5 with the connecting body 33.

Next, the bolts inserted into the locking holes 12 of the upper shoe and the through holes 34 of the connecting body are screwed into the bolt holes 31 of the sole plate, and the upper shoe 4 and the sole plate 29 are connected through the connecting body 33. and fix it.

(H) When the fixation is completed, the construction is completed by removing the locking piece 37 placed between the upper and lower shoes 2 and 4 that restricts the movement of the bearing plate and the upper shoe 4 in the bridge axis direction. It is.

Here, in order to smoothly extrude between the bridge girder G and the bearing pressure plate 8 of the temporary receiver, the bearing pressure plate 8 is
A sliding material 23 is placed on the sliding material 23, and a sliding contact piece 24 is placed on the sliding material 23.
However, the bearing plate 8 may be made of a metal material with excellent lubricity without providing the sliding member 23, or the sliding member 23 may be inserted separately so as to be in sliding contact with the bearing pressure plate 8. However, there is no difference in the effect, and the embodiment is not limited.

Furthermore, a sliding contact piece 2 interposed between the bridge girder G and the sliding member 23
4 can also be omitted by integrally forming a smooth layer on the lower surface of the bridge girder G.

In addition, an embodiment is shown in which a bearing plate is used in the movable body 3 disposed between the upper and lower shoes 2 and 4 to release displacement such as expansion/contraction and deflection of the bridge girder by sliding after completion of extrusion.
Not only the bearing plate but also other members having the same function, such as rollers, pins, and combinations thereof, which release the displacement by rolling, can also be used.

In this way, by arranging the temporary receiver 5 holding the inflated rubber body 7 that produces the jacking function and configuring the support device 1, and pushing out the bridge girder G on the support device 1, the lower surface of the bridge girder G has flatness. Even if a deviation occurs, the temporary receivers 5 on the supporting device 1 support the bridge girder G by communicating the fluid substance 26 injected into the expandable rubber body 7, so that some of the supporting devices 1 Even if an excessive load is applied and the internal pressure attempts to increase, the pressure will be dispersed to the expansion rubber body 7 of the temporary support placed on the other support device 1 communicated with the pipe 25, and The device 1, the so-called temporary receiver 5, is adjusted to maintain a predetermined internal pressure at all times.

Moreover, when the extrusion is completed, the temporary receiver 5 can be removed while extruding the bridge girder G by replacing it with the connecting body 33, thereby improving work efficiency.

In this embodiment, the upper shoe 4 of the support device upon completion of extrusion
The sole plate 29 fixed to the bridge girder G was fixed via the connecting body 33 in consideration of workability, but the bridge girder G was lifted up when it reached a predetermined position without using the connecting body 33. The temporary support body 5 is removed, and after the removal, the bridge girder G is taken down and the upper shoe 4 is removed.
Alternatively, the sole plate 29 may be directly placed and fixed thereon.

Furthermore, although a mode has been described in which one end of the communication hole 17 opens at the bottom surface of the pot-shaped body recess 13 constituting the temporary receiver 5, the opening in the recess 13 of the communication hole 17 may be a vertical wall of the recess 13.

In this case, the connecting portion 20 of the inflatable rubber body 7 is also formed at a position that matches the opening of the communicating hole 17.

Furthermore, although the pipe 25 that communicates the temporary receiver 1 is screwed into the threaded part 18 of the communication hole provided in the pan-shaped body 6, a threaded part is formed in the connecting part 20 of the inflatable rubber body 7 to connect the pipe 25 directly. A mode in which it is connected to the rubber body 7 is also possible.

Additionally, the temporary support 5 is placed on the upper shoe 4 of the support device 1, and its pot-shaped body 6 is placed on the upper shoe 4 of the support device 1.
The bridge girder G is slidably supported by the support plate 8 by being placed in contact with it and temporarily fixed. The pressure plate 8 may be temporarily fixed to the upper shoe 4, and the bridge girder G may be slidably supported by the pot-shaped body 6, which is a so-called reverse mode, and there will be no difference in the effect.

In addition, the characteristics of the expanded rubber body of the present invention will be described next.

In other words, the outer diameter of the pot-shaped body is 340 mm and the thickness is 65 mm.
The outer diameter of the expanded rubber body accommodated in the recess of the pot-shaped body is 240 mm, and the thickness is 20 mm (the inner and outer thicknesses are 5 and 1 mm, respectively).
5mm) and the bearing device in which the bearing pressure plate is in contact with the expanded rubber body exhibits a pressure resistance of 300 kg/d or more, and the bearing device has a pressure resistance of 300 kg/d or more.
cyt showed an output of 130 tons without any abnormalities such as oil leakage.

Further, the allowable stroke of the expanded rubber body (assuming the maximum allowable deformation rate of the rubber material is 200%) is 27 strokes, which is sufficient for use.

The present invention has the above-mentioned configuration, and can easily adjust the height of the support device when pushing out the bridge girder, and has a jacking function even if an excessive load movement is applied to some of the support devices due to irregularity of the flatness of the bridge girder. Since the support reaction force is adjusted to be the same by the temporary support holding the bridge, it is possible to prevent damage to some of the bearing devices, bridge girders, and piers, and it is also easy to fix to the bridge girder after extrusion is completed. It has many effects such as:

In other words: - Temporary supports that are easily attached and detached and have a height adjustment function are placed on the upper shoes of various supporting devices (e.g. roller bearings) that are permanently fixed on the pier, so the levelness of the top surface of the pier is not corrected. There is no problem.

Additionally, the bearing device can be of various types (eg, roller bearing, etc.).

■ When pushing out a bridge girder, the bias of the bridge girder due to the uneven flatness of the lower surface of the bridge girder is compensated for by the height adjustment effect associated with the internal pressure adjustment function in the expansion rubber body of each temporary support, and the load on the bridge girder is always temporarily maintained. Since it is evenly distributed to each support device via the receiver and evenly supports the bridge girder, there is no damage to the bridge girder and no damage to the support device.

■ Vibrations and deflections that occur in the bridge girder when extruding the bridge girder are absorbed by the expanded rubber bodies of the temporary receivers and do not have any adverse effect on the bridge girder.

(2) When replacing the temporary receiver with the connecting body, the temporary receiver has a height adjustment function, so the replacement can be performed smoothly.

That is, if a height difference occurs between the connecting body and the temporary receiver and they collide, the height of the temporary receiver can be increased and corrected.

■ This temporary receiver is easy to assemble and disassemble, and there are not many parts, so it is convenient for maintenance and maintenance.

[Brief explanation of the drawing]

Figures 1 and 2 are explanatory diagrams of the conventional cantilever erection construction method for bridge girders, and Figures 3 and 4 are diagrams showing the use of a support device attached with a temporary support having a height adjustment function according to the present invention. Figures 5 and 6 are explanatory diagrams of the cantilever construction method for the bridge girder, and Figures 7 and 6 are partially longitudinal front and side views showing a support device attached with a temporary support having a height adjustment function of the present invention. Figures 8 and 8 are side and front views showing the support device after extrusion is completed. 1... Support device, 2... Curved lower shoe, 3... Curved/movable body, 4... Upper shoe, 5... Temporary receiver, 6.
- Curved body, 7... Expanded rubber body, 8... Curved bearing pressure plate, 13... Curved part, 17... Communication hole, 19...
...Gap, 2o...Curved connection, 26...
・Fluid substances.

Claims (1)

[Scope of Claims] 1. In a support device 1 having a plurality of temporary supports 5 disposed on a pier B and slidingly supporting a bridge girder G, the support device 1 has a lower shoe 2 fixed to the pier B and a lower shoe 2 fixed to the pier B Consisting of a movable body 3 disposed on a shoe and an upper shoe 4 disposed on the movable body, a temporary receiving body 5 disposed on the upper shoe 4 of the support device 1 has a recess 13 on one end surface. A pot-shaped body 6 formed with an inflatable rubber body 7 that is tightly housed in a recess of the pot-shaped body, and an inflatable rubber body 7 that is disposed with one end surface in contact with the rubber body and the other end surface protruding from the recess 13. The expansion rubber body 7 has a cavity 19 formed therein, and the cavity 19 is provided with a connecting part 20 that communicates with the outside, and the pan-shaped body 6 communicates the recess 13 with the outer surface of the pot-shaped body, and a communication hole 17 is formed in the recess 13 that connects to the connection part 20 of the expandable rubber body, and the temporary receiving body 5 is a supporting device. A support device having a temporary receiving body, which is detachably arranged on the upper shoe 4 of. 2. The temporary receiver 5 has the other end surface of the pot-shaped body 6 where the recess 13 is not formed in contact with the lower shoe 4 of the support device 1, and the protruding end surface of the bearing pressure plate 8 is the sliding support surface of the bridge girder G, as disclosed in the patent. A support device having a temporary receiver according to claim 1. 3 The temporary support body 5 has a patent in which the protruding end surface of the bearing pressure plate 8 is brought into contact with the upper shoe 4 of the support device 1, and the other end surface of the pot-shaped body 6 where the recess 13 is not formed is the sliding support surface of the bridge girder G. A support device having a temporary receiver according to claim 1. 4 The bearing plate 8 holds the sliding material 23 on the upper surface and supports the bridge girder G.
A support device having a temporary receptacle according to claim 2. 5. A support device having a temporary receiver according to claim 3, wherein the pot-shaped body 6 has a bridge girder G holding a sliding member on its upper surface. 6. A support device having a temporary receiver according to any one of claims 1 to 5, wherein the movable body 3 disposed on the lower shoe 2 is a bearing plate with self-lubricating properties. 7. A support device having a temporary receiver according to any one of claims 1 to 5, wherein the movable body 3 disposed on the lower shoe 2 is a rolling element of a roller. 8. The temporary receiver according to any one of claims 1 to 5, wherein the movable body 3 disposed on the lower shoe 2 is a flexible sliding material in which a low-friction sliding material is arranged on a rubber plate. bearing device with. 9. A support device having a temporary receiving body according to any one of claims 1 to 5, wherein the movable body 3 disposed on the lower shoe 2 is a hinge body that tilts around a pin axis.