JPS5827361B2 - Support device for structures with temporary support - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a support device used for installing a structure, and more particularly, a support device for height and support resistance that is suitable for use when installing an upper structure while moving it on a lower structure. The present invention relates to a support device equipped with a temporary receiver having a force adjustment function.

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

Structures for which this installation method is adopted include bridges, buildings, and plant equipment, but for the sake of brevity, we will discuss this in accordance with the so-called bridge girder extrusion construction method. Ru.

In other words, in the conventional bridge girder extrusion construction method, as shown in Fig. 1, the bridge girder G that constitutes the superstructure is formed into blocks of several meters to several tens of meters on a production table installed behind the abutment B'. When the bridge girder G is manufactured and extruded and installed on the pier B that constitutes the lower structure, the hand-stretched garter A is attached to the bridge girder G, and the pier B
As shown in FIG. 2, there is disposed on top a support device which is slid by the extrusion device C.

Next, the bridge girder G is loaded onto the support device, and the bridge girder G is pushed out by a fixed stroke by sliding the support device by the extrusion device C.

Thereafter, in this state, the vertical jack E is operated to lift up the bridge girder G, and after returning the bearing device to its original state with no load, the vertical jack E is lowered and the bridge girder G is lifted onto the bearing device again.
The bridge girder is erected by repeating the process of loading and extruding.

However, in the conventional extrusion construction method, the support devices do not have a height adjustment function, and the installation heights of the support devices arranged on the plurality of piers B are uneven, and the flatness of the lower surface of the bridge girder G is uneven ( During extrusion erection of the bridge girder G, excessive load of the bridge girder G, which has high torsional rigidity, acts intensively on some of the supporting devices due to unevenness (unevenness). The problem remains that a load exceeding the design value is applied to the device, which may eventually cause damage.

This will not be a problem if the heights of the multiple support devices arranged on the pier B are the same and the flatness of the lower surface of the bridge girder G is correct. It is difficult to do it correctly during construction or when manufacturing the bridge girder G.

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

That is, the present invention is a support device for a structure having a plurality of temporary receivers disposed on a lower structure and slidingly supporting the upper structure, and is composed of the following main parts.

(I) The support device has a support base consisting of a bottom plate with a smooth upper surface that is fixed to the lower structure, a movable body that slides on the bottom plate arranged on the bottom plate, and an upper shoe that slides on the movable body with a curved surface. (II) The temporary receiver, which is removably placed on the upper shoe of the supporting base described in i*, is a pot-shaped body with a recess formed on one end surface, and a pot-shaped body with a recess formed in the recess of the pot-shaped body. It consists of an inflatable rubber body that is tightly housed, and a bearing plate that has one end surface in contact with the inflatable rubber body and the other end surface that protrudes from the recess, and the inflatable rubber body is introduced from the outside. It performs a jacking function using a fluid substance.

Describing the aspect of the method of using this support device with a temporary support, as shown in Fig. 3, a temporary support having the above-mentioned jacking function is placed on one pier B constituting the lower structure. Each pier B is equipped with a bearing device S equipped with
Either the temporary supports on the support devices S are connected to each other by pipes H connected to the pumps F, or the temporary supports on the support devices S arranged on a plurality of piers B are connected to each other, as shown in FIG. Divide the receiver into a certain range of piers B, or connect all the receivers with a pipe H connected to the pump T, and pump F.
By injecting a more fluid substance into the expanded rubber body of the temporary receiver that produces the jacking function, or by discharging the injected fluid substance from a discharge pipe (not shown), the expansion rubber body is temporarily expanded or contracted. Adjust the height of the receiver.

Then, in this state, the valve 1 (or check valve) provided on the pipe H connected to the pump F is used to close certain portions while keeping the temporary receivers on the individual support devices S in communication. Even if the flatness of the lower surface of the bridge girder becomes uneven, it is possible to prevent excessive loads from acting on some of the supporting devices S.

In other words, since the temporary supports on the individual support devices S are connected through pipes H, due to the irregularity of the flatness of the lower surface of the bridge girder, excessive force acts on some of the support devices S, causing the height of the temporary support devices to be reduced. Even if the pressure decreases, the pressure of the fluid substance in the inflatable rubber body remains the same, and the supporting devices S are adjusted to support the reaction force according to the bearing pressure area of the inflatable rubber body. The bridge girder G can be pushed out while preventing an excessive load from acting on the supporting device S.

After the extrusion is completed, the sole plate integrally fixed to the upper shoe of the support device S and the bridge girder G is directly fixed by removing the temporary support.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a temporary support device according to the present invention will be described in detail with reference to FIG. 5 and subsequent drawings.

Reference numeral 1 denotes a support device, which is disposed on the pier B constituting the lower structure to support and push out the bridge girder G constituting the upper structure.

The support device 1 is composed of a flat bottom plate 2 and a support base 3 that slides on the bottom plate 2, and the support base 3 includes:
A movable body (bearing plate) 4 having a sliding member 4a on its lower surface that comes into sliding contact with the bottom plate 2 and having a convex curved surface 4b on its upper surface.
and an upper shoe 5 arranged on the movable body 4 and having a concave curved surface 5a matching the convex curved surface 4b of the movable body.

Reference numeral 2a denotes the upper surface of the bottom plate 2, and the upper surface 2a is formed to be smooth so that the support base 3 can make good sliding contact with the lower surface of the movable body 4.

Furthermore, the movable body 3 has a sliding surface on its lower surface and a convex curved surface 4b on its upper surface, so that it has the function of releasing the deflection of the bridge girder during extrusion and the deflection and expansion/contraction of the bridge girder after extrusion is completed.

Reference numeral 6 denotes a temporary receiving body removably disposed on the upper shoe 5 of the support device 1, and the temporary receiving body 6 is composed of a pot-shaped body 7, an inflatable rubber body 8, and a bearing pressure plate 9.

Each part of the temporary receiver 6 has the following configuration.

10 is a concave portion provided on one end surface (upper surface) of the pot-shaped body 7; 11 is a protruding portion provided on both ends of the other end surface (lower surface) of the pot-shaped body 7 in the bridge axis direction; The portions 11 are formed to be removably fitted to both ends of the upper surface of the upper shoe 5 in this direction, and are temporarily fixed to the upper shoe 5 by this fitting during extrusion.

Further, 12 is a fixing hole provided on the bottom surface of the recess 10 of the pot-shaped body, 13 is a communication hole between the fixing hole 12 and the outer surface of the pot-shaped body 7,
Communication holes each having an opening, 14 is the communication hole 13
This is a threaded portion provided in the opening on the outer surface side.

15 is a gap formed inside the inflatable rubber body 8; 16 is a connecting portion integrally provided on one end surface of the inflatable rubber body 8 with one end protruding from the end surface; An injection hole 17 that communicates with the cavity 15 is provided in the cavity 15 .

Reference numeral 18 denotes a convex curved surface formed on the periphery of one end surface of the bearing pressure plate 9 that is in contact with the inflatable rubber body 8 .

Reference numeral 19 denotes a pipe screwed into the threaded portion 14 of the communication hole provided in the pot-shaped body 7 of the temporary receiver, and the pipe 19 is connected to each temporary receiver 6.
The other end is connected to the pump.

Reference numeral 20 denotes a fluid substance, and the fluid substance 20 is injected into the cavity 15 of the expandable rubber body constituting the temporary receiver 6 by a pump.

21 is an anchor bolt that fixes the bottom plate 2 to the pier B; 22
Reference numerals 23 and 23 indicate attachment points for extrusion devices (not shown in this embodiment) formed on both sides of the outer peripheral surface of the upper shoe 5 in the direction perpendicular to the bridge axis; It is a hole.

Reference numeral 24 denotes a sole plate that is fixed in advance with anchor bolts 25 during the manufacture of the bridge girder G, and after completion of extrusion, the sole plate 24 is placed so that its lower surface is flush with the lower surface of the bridge girder G. It has been fixed.

Reference numeral 26 denotes bolt holes formed at both ends of the lower surface of the sole plate 24 in the bridge axis direction, and the bolt holes 26 correspond to the locking holes 24 of the upper shoe.
It is set up to match.

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

That is, a movable body 4, ie, a bearing plate, is arranged on the bottom plate 2, and an upper shoe 5 is arranged on the bearing plate.

Thereafter, the temporary receiver 6 is temporarily fixed on the upper shoe 5 in the following manner.

That is, the expansion rubber body 8 is placed in the recess 10 of the pot-shaped body, and the connection part 16 protruding from the rubber body 8 is inserted into the fixing hole 12 provided on the bottom of the concave part, and the injection hole 17 of the connection part and the communication hole of the pan-shaped body are connected. 13 so that they match and are tightly housed.

Then, the end surface of the bearing pressure plate 9 having the convex curved surface 18 formed on the periphery is brought into contact with the rubber body 8 to seal the rubber body 8, and the other surface is made to protrude from the concave portion 10 of the pot-shaped body. Allocate.

The temporary receiver 6 configured in this manner is temporarily fixed by removably fitting the convex strips 11 of the pot-shaped body to both ends of the upper shoe 5 in the bridge axis direction.

Hereinafter, a method for constructing the bridge girder G using the thus constructed support device with temporary receivers will be described.

(A) First, a plurality of support devices 1 with temporary receivers are attached to the pier B.
The bottom plate 2 is fixed onto the top with anchor bolts 21, and the support base is attached by attaching an extrusion device to the part 22.

(B) Next, the temporary receivers 6 of the support devices arranged on each pier B are inserted into the pot-shaped body communication holes 13 of the temporary receivers 6 for each pier (or for each pier within a certain range, or for all the piers). A pipe 19 connected to a pump is screwed onto the provided threaded portion 14 to allow the temporary receivers 6 to communicate with each other.

(C) In this state, the height of the temporary receiver 6 is adjusted by operating the pump.

That is, by injecting the fluid substance 20 from a pump through the pipe 19 and the communication hole 13 into the cavity 15 of the expanded rubber body from the injection hole 17 at the connecting part, or by discharging the fluid substance 20 that has been injected, the rubber body The height of the support plate 9 is adjusted by raising and lowering the pressure plate 9 by expanding and contracting the pressure plate 8.

(D) After connecting, the pipe 1 is connected with the temporary receiver 6.
9 (not shown in this embodiment) is closed.

(E) In this state, load the bridge girder G manufactured behind the abutment onto the support device 1 via the temporary receiver 6, and push the bridge girder G onto the upper surface 2a of the bottom plate 2 and the lower surface of the movable body 4 using an extrusion device. By sliding contact with the disposed sliding member 4a, the support base 3 is pushed (or pulled out) forward (in the direction of the arrow in the figure) by a certain stroke.

(F) Next, the bridge girder G is lifted up using a separately provided vertical jack (not shown), and the support device 1 is returned to its starting point, that is, the original state before extrusion, using an extrusion device with no load applied.

((2) In this state, the vertical jack is lowered to load the bridge girder G onto the temporary support body 6 and the support device 1, and the operation of pushing out a certain stroke is repeated again, so that the sole fixed to the bridge girder G in advance The plate 24 is pushed out to a position where it mates with the defined bearing device 1.

(See Figure 8) (H) In this state, lift up the bridge girder G with a vertical jack,
After removing the temporary support 6 on the support device 1 and confirming that the locking hole 23 of the upper shoe and the bolt hole 26 of the sole plate 24 are accurately aligned, remove the vertical jack and remove the sole plate. 24 is brought into contact with the upper shoe 5.

(■) After this, the bridge girder G is fixed on the support device 1 by screwing the locking hole 23 of the upper shoe and the bolt hole 26 of the sole plate with the bolt 27, and the erection of the bridge girder is completed (
(See Figure 9).

In this way, by arranging the temporary support 6 holding the expanded rubber body 8 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 misalignment occurs, the temporary supports 6 on the support device 1 are in communication with each other and support the bridge girder G, so an excessive load acts on some of the support devices 1, causing the internal pressure inside the temporary support device to increase. Even if the pressure is to increase, the pressure will be transferred to the other supporting device 1 connected through the pipe 19.
The fluid substance 20 injected into the expansion rubber 8 is moved and dispersed in the expansion rubber body 8 of the temporary support placed above, and the temporary support 6 of each support device 1 is always maintained at a predetermined internal pressure. Therefore, a predetermined load is always applied to each support device 1.

In this embodiment, the sliding material 4a is disposed on the lower surface of the movable body 4, but instead of the sliding material 4a, a solid lubricant may be embedded in the lower surface, or the movable body 4 may be made of a material with excellent self-lubricating properties. Depending on the configuration, it is also possible to directly bring the lower surface of the movable body into sliding contact with the bottom plate 2.

The support device with temporary support of the present invention has the above-described configuration and has the above-mentioned functions and actions when constructing structures such as bridge girders, so it has the following various superior effects compared to conventional devices. be.

- In this bearing device, the support base slides on the bottom plate with a smooth upper surface, so there is no problem of unevenness (unevenness) of the upper surface of the lower structure such as a bridge pier.

That is, since each bottom plate is accurately set on the upper surface of the bridge pier, problems caused by unevenness of the bridge girder that occur when extruding the upper structure such as the bridge girder are almost entirely due to the unevenness of the lower surface of the bridge girder.

In addition, since the upper surface of the bottom plate that slides on the support base is formed to be smooth, extrusion of the bridge girder is performed smoothly.

■ During extrusion construction of superstructures such as bridge girders, deviation of the bridge girder due to unevenness of the lower surface of the bridge girder is compensated for by the height adjustment function associated with the internal pressure adjustment function in the expansion rubber body of the temporary support on each support device. The load of the bridge girder is always distributed evenly to each support device via the temporary support body, and the bridge girder is supported evenly, so there is no damage to the bridge girder and no damage to the support devices.

In addition, since the load acts equally on each support device, the support base and the bottom plate can slide smoothly.

■When extruding a superstructure such as a bridge girder, vibrations and deflections that occur in the bridge girder are caused by the flexibility of the expansion rubber body of the temporary support and the support base (
It is absorbed by the synergistic effect of the uneven surface of the movable body and the upper shoe, and has no adverse effect on the bridge girder.

[Brief explanation of drawings]

Figures 1 and 2 are explanatory diagrams of the conventional extrusion construction method for bridge girders, and Figures 3 and 4 are illustrations of the construction method using a support device attached with a temporary support having a height adjustment function according to the present invention. 5 and 6 are partially vertical front and side views of an embodiment of the present invention, FIG. 7 is an enlarged view of the corner of FIG. 6, and FIGS. 8 and 9 are a support device of the present invention. FIG. 3 is a partially longitudinal side view showing a method of fixing the sole plate to the sole plate.

Claims (1)

[Claims] 1. In a support device 1 having a plurality of temporary supports 6 disposed on a lower structure B and slidingly supporting an upper structure G, the upper surface of the support device 1 is fixed to the lower structure B. A smooth bottom plate 2 and a movable body 4 arranged on the bottom plate 2 and in sliding contact with the bottom plate 2.
and a support base 3 consisting of an upper shoe 5 that slides on the movable body 4 on a curved surface, and a temporary support body 6 detachably arranged on the upper shoe 5 of the support base 3 has a support base 3 on one end surface. A pot-shaped body 7 in which a recess 10 is formed, an inflatable rubber body 8 that is tightly housed in the concave part 10 of the pan-shaped body, one end surface is brought into contact with the inflatable rubber body 8, and the other end surface is brought into contact with the concave part. The inflatable rubber body 8 has a cavity 16 formed therein, and a connecting part 17 communicating with the outside is provided in the cavity 16. The pot-shaped body 1 has a recess 10 communicating with the outer surface of the pot-shaped body, and a communication hole 14 connected to the connecting portion 11 of the expandable rubber body 8 is formed in the concave portion 10. A structural support device with a temporary support.