JPS5825123B2 - Supporting device for structures - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a support device used for installing a structure, and in particular,
The present invention relates to a support device having a support reaction force adjustment function suitable for use when installing an upper structure constituting the structure while moving it on a lower structure.

Such a superstructure is constructed by forming the superstructure into blocks or units and moving the superstructure to an installation position on the support device.
It is constructed by being integrated at the installation location.

Bridges, buildings, and plant equipment are examples of structures that can be installed using this method, but for the sake of brevity, we will discuss this method in accordance with the so-called cantilever construction method for bridge girders. .

In other words, in the conventional bridge girder cantilever erection construction method, as shown in Figure 1, the bridge girder G that constitutes the superstructure is built in the shape of a block of several meters to several tens of meters on a manufacturing table installed behind the abutment B'. When extruding and erecting the bridge girder G on the bridge pier B that constitutes the lower structure, the hand-stretched garter A is attached to the bridge girder G, and the support device C is arranged on the bridge pier B. is loaded onto the support device C,
Directly on the bridge girder G, or as shown in Figure 2, on the bridge pier B.
The bridge girder G is slid onto the support device C and pushed out using a push-out device attached to the support device C, thereby constructing the bridge girder.

However, in this conventional construction method, multiple piers B
Due to uneven installation heights of the supporting devices C placed above and irregularities in the flatness of the lower surface of the bridge girder G, some of the supporting devices C were damaged during extrusion erection of the bridge girder G. The problem remains that the load is concentrated and the load acts on the bridge girder G1 support device C and the bridge pier B in a manner that exceeds the design value and may even cause damage.

This will not be a problem if the heights of the multiple support devices C arranged on the pier B are the same and the flatness of the lower surface of the bridge girder G is correct. This is difficult in terms of construction or manufacturing of the bridge girder G.

The present invention was made in order to solve these problems, and in order to support a broken or unitized upper structure and prevent damage to the upper structure during movement, The object of the present invention is to provide a support device that can support the upper structure with a predetermined support reaction force even if the lower surface of the upper structure is uneven, and an outline thereof will be described below.

In other words, the outline of the present invention is as follows: ``A supporting device is provided by a pot-shaped body having a recess formed in one end surface, an inflatable rubber body tightly housed in the concave portion of the pot-shaped body, and one end surface of which is attached to the rubber body. and a pressure bearing plate disposed with the other end surface protruding from the recess, and the inflatable rubber body has a cavity formed inside thereof, and a connecting part communicating with the outside is provided in the cavity. In addition, the pot-shaped body communicates the concave portion with the outer surface of the pot-shaped body, and a communication hole is formed in the concave portion, which communicates with the connecting portion of the expandable rubber body.

The support device is fixed to the lower structure of the pan-shaped body, the protruding end surface of the bearing pressure plate is fixed to the sliding support surface of the upper structure, or the bearing pressure plate is fixed to the lower structure, and the other end surface of the pan-shaped body is fixed to the sliding support surface of the upper structure. It is arranged between the upper and lower structures in such a way that it becomes a sliding support surface for the upper structure, and when the upper structure is installed, the supporting devices are communicated with each other through a communication hole, and a fluid substance is introduced into the gap of the inflatable rubber body through the communication hole. By injecting or discharging the injected fluid substance to expand, contract, and tighten the expanded rubber body, the support device has a jacking function, and the support device itself supports the upper structure with a predetermined support reaction force. This is a structural support device in which the height of the support device can be adjusted.

To describe the method of using the bearing device, as shown in FIG.
The support device S is connected to the pump E for each pier B as one unit, or the support device S is connected to the pump E by a pipe F, or the support device S is arranged on a plurality of piers B as shown in FIG. is divided into a certain range of piers B, or all of them are connected through pipe F connected to pump E, and the fluid substance is injected or injected from pump E into the expanding rubber body of the support device that produces the jacking function. By discharging the fluid material through a discharge pipe (not shown), the height of the support device S is adjusted while expanding or contracting the inflatable rubber body.

In this state, the individual bearing devices S are communicated with each other by a valve H (or a check valve) provided on a pipe F connected to the pump E, and certain portions are closed, thereby flattening the lower surface of the bridge girder. Even if a misalignment occurs, it is possible to prevent an excessive load from acting on some of the supporting devices S.

In other words, since the individual bearing devices S are connected by pipes F, some of the bearing devices S may
Even if an excessive force is applied to and its height decreases, the pressure of the fluid substance in the inflatable rubber body of the support device S will all be the same, and the support device S will each respond to the bearing pressure area of the inflatable rubber body. Since it is adjusted to support the reaction force, the bridge girder G can be pushed out while preventing an excessive load from acting on some of the supporting devices S.

After the extrusion is completed, the bearing device S is permanently attached to the bridge girder G.
The bridge girder G may be replaced with a supporting support and removed, or the bridge girder G may be permanently supported as is.

Furthermore, when the bridge girder G is permanently supported after completion of extrusion by providing a valve 1 on each support device S, the fluid material is transferred to the support device S by closing the valve 1.
The pump E and pipe F can be removed after being sealed inside.

In addition, if unexpected ground subsidence occurs, the valve 1
Ground subsidence can be compensated for by arranging a pipe F and a pump E at the support device S and injecting a new fluid substance into the support device S to increase the height of the support device S.

Therefore, the support device of the present invention will be explained in detail below based on the drawings from FIG. 5 onwards.

5 and 6 show an embodiment of the present invention, in which 1 is a support device, and the support device 1 is disposed on a bridge pier B that constitutes a lower structure, and is attached to a bridge girder G that constitutes an upper structure. Slide into contact.

The support device 1 is composed of a pot-shaped body 2, an inflatable rubber body 3, and a bearing pressure plate 4.

5 is a recess provided on one end surface (top surface) of the pot-shaped body 2;
6 is an anchor bolt for fixing the pot-shaped body 2 to the pier B; 7
Reference numeral 8 indicates a fixing hole provided on the bottom surface of the recess 5 of the pot-shaped body, 8 communicates the fixing hole 7 with the outer surface of the pot-shaped body 2, and each has an opening, and 9 indicates a communication hole of the communication hole 8. This is a threaded portion provided in the opening on the outer surface side.

Reference numeral 10 denotes a connecting portion in which a cavity 11 formed inside the inflatable rubber body 3 is integrally provided on one end surface of the inflatable rubber body 3 with one end protruding from the end surface, and the connecting portion 11 is provided at the center thereof. An injection hole 12 communicating with the cavity 10 is provided.

13 is a convex curved surface formed on the periphery of one end surface of the bearing pressure plate 4;
Reference numeral 14 denotes a sliding member fitted onto the other end surface of the bearing pressure plate 4.

15 is a sliding contact valve arranged between the bridge girder G and the bearing plate 4; 16
A pipe is screwed into the threaded portion 9 of the communication hole of the pot-like body 2 and communicates with each support device 1, and the other end of the pipe 16 is connected to a pump (not shown in the embodiment).

17 is a fluid substance, and the fluid substance 17 is injected into the cavity 10 of the expanded rubber body by a pump.

The support device 1 of the present invention has an inflatable rubber body 3 in a recess 5 of a pot-shaped body, and a connection part 11 protruding from the rubber body 3 is connected to a fixing hole 7 provided at the bottom of the recess, and an injection hole 12 of the connection part. The pot-shaped body is fitted so that the communicating holes 8 of the pot-shaped body are aligned with each other, and the pot-shaped body is tightly housed.

Then, the end surface of the bearing plate 4 having the convex curved surface 13 formed on the periphery is brought into contact with the rubber body 3 so as to seal the rubber body 3, and the surface on which the sliding material 14 is arranged is placed from the concave portion 5 of the pot-shaped body ρ. It is constructed by placing it in a protruding manner.

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

(A) First, a plurality of supporting devices 1 are placed on the pier B, and the pot-shaped body 2 is placed on the pier B.
are fixed and arranged with anchor bolts 6.

(B) Next, the bearing device 1 arranged on each pier B
The pipe 16 connected to the pump is screwed into the screw part 9 provided in the base body communication hole 8 of the support device for each pier (or for each pier in a certain range, or for all the piers) to connect the support device 1. .

The height of the support device 1 is adjusted by operating the pump in the state shown in (C), that is, the fluid substance 17 is passed from the pump through the pipe 16 and the communication hole 8 into the cavity 10 of the expandable rubber body through the connection injection hole. By injecting or discharging the injected fluid substance 17 from 12, the pressure plate 4 is moved up and down by the expansion and contraction of the rubber body 3, and its height is adjusted.

(D) After this, the supporting device 1 closes the valve (not shown in the embodiment diagram) disposed on the pipe 16 in a communicating state.

(E) In this state, load the bridge girder G manufactured behind the abutment onto the support device 1 via the sliding contact piece 15, and
is continuously pushed forward (in the direction of the arrow in FIG. 6) by sliding contact between the sliding contact piece 15 and the sliding member 14 arranged on the bearing pressure plate 4 of the support device.

(F) Then, when the bridge girder G reaches a predetermined position, the bridge girder G is supported by a permanent support such as a roller support or a pin support, and the support device 1 is lifted out, so that the support device 1 is placed in an unloaded state. The construction will be completed by removing the bridge.

Here, in order to smoothly extrude between the bridge girder G and the bearing pressure plate 4 of the bearing device when extruding the bridge girder G, a sliding material 14 is arranged on the bearing pressure plate 4, and a sliding contact piece is placed on the sliding material 14. 1
Although the bearing plate 4 may be made of a metal material with excellent lubricity without disposing the sliding member 14, the bearing plate 4 may be made of a metal material with excellent lubricity, or a sliding member 14 may be provided separately so as to be in sliding contact with the bearing plate 4. There is no difference in the effect even if it is inserted, and this aspect is not limited.

Furthermore, a sliding contact piece 1 interposed between the bridge girder G and the sliding member 14
5 can also be omitted by integrally forming a smooth layer on the lower surface of the bridge girder G.

By configuring the support device 1 with the inflatable rubber body 3 that produces the jacking function and pushing out the bridge girder G, even if the lower surface of the bridge girder G is out of flatness, the inflatable rubber body of the support device 1 can be Since the fluid materials 17 injected into the support devices 3 support the bridge girder G in a communicating state, even if an excessive load acts on some of the support devices 1 and the internal pressure increases, the pressure will not increase. The pressure is distributed to the inflatable rubber bodies 3 of other supporting devices 1 that are communicated with each other through a pipe 16, and each supporting device 1 is adjusted to maintain a predetermined internal pressure at all times.

In addition, in the embodiment, a mode has been described in which one end of the communication hole 8 is opened at the bottom surface of the pot-shaped body recess 5, but the recess 5 of the communication hole 8
The opening inside may be a vertical wall of the recess 5.

In this case, the connecting portion 11 of the inflatable rubber body 3 is also formed at a position that coincides with the opening of the communication hole 8.

Although the pipe 16 that communicates the support device 1 is screwed into the threaded part 9 of the communication hole provided in the pan-shaped body 2, it is also possible to form a threaded part in the connection part 11 of the expansible rubber body 3 and connect the pipe 16 directly. A mode in which it is connected to the rubber body 3 is also possible.

Furthermore, the pot-shaped body 2 of the support device 1 is fixed to the pier B, and the bearing pressure plate 4 is
In this embodiment, the bridge girder G is slidably supported, but the bearing pressure plate 4 is provided with a fixing means to the pier B, the bearing pressure plate 4 is fixed to the bridge pier B, and the bridge girder G is slidably supported by the pot-shaped body 2. A so-called reverse mode may also be used, and there will be no difference in effect.

7 to 10 show another embodiment of the support device 1, and this example shows a mode in which the bridge girder G is permanently supported during extrusion of the bridge girder G and even after the extrusion is completed. .

That is, in the embodiment shown in FIGS. 7 and 8, the sole plate 18 is fixed at a position that matches the support device 1 when the extrusion is completed on the bridge girder G, and when the construction of the bridge girder G is completed, the sole plate 18 and the extrusion are fixed. By slidingly contacting the sliding member 14 of the supporting device used at the time, the expansion and contraction of the bridge girder G that occurs after erection is released, and the elastic deformation of the inflatable rubber body 3 allows the bridge girder G to
It is designed to release the deflection of the

In this embodiment, it is preferable to provide a rib 19 on the lower surface of the pot-shaped body 2 in order to firmly fix the support device 1 to the pier B.

Furthermore, the embodiments shown in FIGS. 9 and 10 show a support device 1 suitable for preventing the bridge girder G from floating up after construction, and a notch is provided at the upper end of the pot-shaped body 2 of the support device. At the same time, a sole plate 18 is provided on the bridge girder G in advance, and a fitting fixing part 2 is attached to the sole plate 18 so as to correspond to the engaging part 20.
1 and fixed.

With this configuration, the locking piece 2 has a hook portion that is vertically engaged with the engaging portion 20 after extrusion is completed.
2 to the fitting fixing part 21 of the sole plate by positioning and fixing it in the notch of the engaging part 20, the bridge girder G
It is designed to prevent the surface from rising.

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

In other words, the outer diameter of the pot-shaped body is 340 mm, and the thickness is 65 m.
m, the outer diameter of the expandable rubber body accommodated in the recess of the pot-shaped body is 240rrrm, the thickness is 20 mm (inner and outer thicknesses are 5 mm and 15 mm, respectively), and the support device has a bearing pressure plate in contact with the expandable rubber body. showed a withstand pressure of 300% or more, and at 300 ton, there were no oil leaks or other abnormalities and an output of 130 tons.

Further, the allowable stroke of the inflatable rubber body is 27 mm (assuming the maximum allowable deformation rate of the rubber material is 200 factors), which is sufficient for use.

As mentioned above, since the supporting device of the present invention has the above-described configuration and is implemented in the above-described usage mode, compared to the conventional device,
It has the following various excellent effects.

- Since this support device has a height adjustment function, compared to conventional devices, there is no need to be as precise in fixing the top surface of the pier in the height direction, reducing the effort required for installation.

■When pushing out the bridge girder, the deviation of the bridge girder caused by the unevenness of the 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 support device, and the load on the bridge girder is always maintained at each level. Since it is evenly distributed to the bearing device and evenly supports the bridge girder, there is no damage to the bridge girder and there is no damage to the bearing device.

■By communicating each support device for each pier or for each pier, the height of each pier can be set freely.

■ When the bridge girder is extruded, the vibrations and deflections that occur in the bridge girder are absorbed by the elastic action of the expanded rubber body, and do not have any adverse effects on the bridge girder.

■ If this bearing device is used permanently and unexpected ground subsidence occurs, a new fluid substance is injected into the expansion rubber body of the bearing device to adjust the height of the bearing device and prevent ground subsidence. can be compensated.

■ This bearing device 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]

1 and 2 are explanatory diagrams of a conventional bridge girder cantilever construction method, and FIGS. 3 and 4 are explanatory diagrams of a bridge girder cantilever construction method using the structural support device of the present invention, 5 and 6 are partially longitudinal front and side views showing a support device for structures according to the present invention, and FIGS. 7 to 10 are partially sectional views showing support devices for structures according to other embodiments. FIG. 3 is a longitudinal side view and a front view. DESCRIPTION OF SYMBOLS 1... Support device, 2... Pot-shaped body, 3... Expandable rubber body, 4... Bearing pressure plate, 5... Recessed part, 8... Communication hole,
DESCRIPTION OF SYMBOLS 10...Void part, 11... Connection part, 17... Fluid substance.

Claims (1)

[Scope of Claims] 1. A plurality of support devices are fixedly arranged on a lower structure B and slidably support an upper structure G. The support device 1 includes:
A pot-shaped body 2 with a recess 5 formed in one end surface, an inflatable rubber body 3 tightly housed in the concave portion 5 of the pan-shaped body, one end surface abutting the inflatable rubber body, and the other end surface and a support plate 4 disposed to protrude from the recess 5; □ The inflatable rubber body 3 has a cavity 10 formed therein, and a connecting part 11 communicating with the outside in the cavity 10. The pot-shaped body 2 communicates the concave portion 5 with the outer surface of the pot-shaped body, and the connecting portion 1 of the expandable rubber body 3 is connected within the concave portion.
A support device for a structure, in which a communication hole 8 connected to the structure 1 is formed. 2. The structure support device according to claim 1, wherein the support device 1 fixes the pot-shaped body 2 to the lower structure B, and uses the protruding end surface of the bearing pressure plate 4 as a sliding support surface of the upper structure G. 3 The support device 1 fixes the bearing pressure plate 4 to the lower structure B, and fixes the other end surface of the pot-shaped body 2 where the recess 5 is not formed to the upper structure G.
A support device for a structure according to claim 1, wherein the sliding support surface is a sliding support surface. 4. The structure bearing according to any one of claims 1 to 3, in which the sliding contact between the supporting device 1 and the upper structure G is made through a sliding member 14 held by the supporting device. Device. 5 At the outer upper end of the pot-shaped body 2, an engaging part 20 is provided in correspondence with the fitting fixing part 21 of the sole plate 18 of the upper structure G.
has been established. A support device for a structure according to claim 1 or 2.