JPH0454002B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Field of Application] The present invention relates to a method for extreme pressure support and temporary support of a structure such as a bridge for repairing or replacing a support interposed between a structure and a support platform. [Prior Art] As shown in Figure 6 and below, there is a gap between the currently completed structure A, such as a bridge or expressway, and the support base B.
In order to reliably transmit vertical loads such as dead loads and live loads of structure A to support base B, and also to transmit horizontal loads in the direction perpendicular to the bridge axis due to earthquakes, wind, etc. C is interposed at both ends in the length direction of the support base B, and the support C is protected against cracks caused by distortion and bending stress due to loads and vibrations from the structure A, or due to rainwater, sand, etc. Aging occurs due to factors such as corrosion, so repairs and replacements are required. Therefore, in the past, metal plates or steel sandals were stacked near the support C at approximately the same height as the support C to serve as a temporary support member D, and a hydraulically-operated normal structure capable of lifting the structure A was used. A jack I is installed in the gap near the support C, and jacked up until the support C and the structure A are slightly apart. Then, metal plates, etc. are further stacked on top of the temporary support member D, and the structure is tightened. Thing A
By temporarily supporting the structure A, removing the support C, repairing or converting it, returning it to its original position, jacking up the structure A again with the ordinary jack I, removing the temporary support member D, and jacking it down. Repair work was being carried out on bearing D. However, the ordinary jack I, which is used to lift heavy structures weighing several hundred to several thousand tons near the fulcrum, is large and can be installed in the gap between structure A and support base B, but in reality is the length between the support C and the end of the support base B, that is, the edge distance is about 10 to 30 cm, and the height of the support C is:
For example, in the case of a bearing plate support, etc., the length is about 10 to 20 cm, so the installation space for the jack I is usually small.
Moreover, since the location where the support C is installed is at a high place of several meters to several tens of meters, it is impossible to install the large jack manually.
It was dangerous work. Furthermore, around the bottom of the center of Structure A, there are girders to reinforce Structure A and other piping installed vertically and horizontally, so there is no place to install jacks between the supports C and C, making work difficult. There were some cases where it was possible. Therefore, a temporary support material D such as a metal plate is first interposed at approximately the same height as the gap between the structure A and the support base B, and a bracket E made of metal or the like is fixed to the side wall of the support base B with bolts or the like. , Place an ordinary jack I on top of the bracket E, jack up the structure A by several mm, and in that state, tighten the temporary support material D and the structure A.
Temporary receiving material D so that it is approximately the same height as the gap formed in
The so-called bracket method involves further intervening to temporarily support the support C, removing the support C for repair or conversion, jacking it up again with an ordinary jack I, removing the temporary support material D, and jacking it down for repair. In order to extend the support base B, we created foundation concrete on the hanging ground where the support base B was installed and installed the foundation F.
A steel material G is erected from the base F at approximately the height of the support base B, and a temporary support base H is placed so that the upper surface is horizontal.
There is a so-called steel vent method in which a normal jack I is placed in front of the temporary support stand H and the structure is temporarily supported by jacking it up in the same manner as described above. [Problem to be Solved by the Invention] However, these methods are only examples, and depending on the installation location and size of the support, it may be impossible to install a hydraulic ordinary jack I in the gap between the structure and the support base. There are cases where it is impossible to work because it is at a high place, or where there is a gap but the ground area is small and the ordinary jack I cannot be installed. Examples of these problems are listed below. The conventional jack I, which is used to lift heavy structures weighing several hundred to several thousand tons as a fulcrum, is so large that it may not be possible to install it in the gap between the structure and the support base. It is not possible to lift the structure directly with the jack I, and even if it can be installed, the temporary support member and the normal jack I are installed near the support on the support platform, which reduces the work area and makes the work inconvenient. . For safety reasons, if we were to lift a 100t structure, we would need a jack with a maximum force of about 150t, taking into account the safety factor, but since the cylinder of normal jack I is cylindrical, As shown in the figure, a load is applied to the edge of the shoulder of the support, which causes fatigue at the edge of the shoulder of the support and there is a risk of collapse. The height of the jacking can be determined by lifting the structure to the extent that the bearing and the structure are separated by a few mm, but even when the bearing is being repaired, the jack I is normally conducted from the structure etc. instead of the bearing. Because the structure is subjected to loads and vibrations, the ordinary jack I alone cannot support the structure for a long time.
In order to support it, it is necessary to intervene with a temporary support member, and for this reason, once the temporary support member is installed, the structure will be in a raised state, including the amount of overhang such as sinking and fitting amount. However, if the end of the structure is raised too far, the structure will warp, and there is a risk of cracks in the slab concrete near the end crossbeams. It is difficult to adjust the pressure reduction of the hydraulic pressure when jacking down the regular hydraulic jack I, and the structure is difficult to work with concrete because the structure suddenly falls down due to its own weight. Normally, even during support repair work, vehicles pass over the top of the structure, so the height difference between adjacent structures must be approximately 10 mm for safety reasons, and there is a limit to the lifting height. Even when lifting, it is a delicate work to reduce the difference in level, but with a regular hydraulic jack I, it is difficult to make delicate lifting management adjustments, and lifting errors are likely to occur, which has a negative impact on the structure. If the location where the support is installed is above the surface of water such as a river or the sea, a ship, etc. may be placed below the support and the repair work may be carried out from the ship using a crane, etc., resulting in large-scale work and reducing costs and time. It takes. Ordinary Jyatsuki I is heavy and difficult to move manually when installing it, and since it is relatively tall, there is a risk that it will topple over and fall due to earthquakes or vibrations. If it falls, it may cause a serious accident. With the bracket method, steel vent method, etc., it takes a lot of time and cost to create a temporary base before lifting the structure. The present invention solves the above problems and provides a method for safely lifting and temporarily supporting a structure using a wedge-shaped jack that can directly lift the structure regardless of the location where the support is installed. It is something to do. [Means for Solving the Problems] In view of solving the above-mentioned problems, the present invention provides a wedge-shaped drive member that is associated with a push/pull means, whose movement is restricted in the width direction, and whose upper and lower surfaces are inclined surfaces. a lower wedge pressure receiving member having an inclined surface substantially the same shape as the inclined surface of the lower surface of the wedge-shaped drive member on its upper surface and whose movement is restricted in the width direction and length direction; and an inclined surface substantially the same as the inclined surface of the upper surface of the wedge-shaped driving member The wedge-shaped drive member is disposed narrowly between the upper wedge pressure receiving member which is provided on the lower surface and whose movement is restricted in the width direction and the length direction, and by moving the wedge-shaped driving member in the length direction, the lower wedge pressure member is attached to the inclined surface of the upper surface. A wedge-shaped jacking device, in which the wedge-shaped driving member rises while moving in the longitudinal direction, and the upper wedge pressure-receiving member rises along the slope of the upper surface of the wedge-shaped driving member, is attached to a structure and a support base. and a stopper means for maintaining the structure in a lifted state by abutting the lower end of the structure, with the upper wedge pressure receiving member installed in the gap and rising by operating the push/pull means. Therefore, it is an object of the present invention to provide a method for supporting and temporarily supporting a structure under extreme pressure. [Operation] Therefore, when the wedge-shaped driving member is pushed by the push/pull means, the wedge-shaped driving member moves upwards while moving in the length direction along the inclined surface, and the upper wedge located above the wedge-shaped driving member moves upward. Since the pressure receiving member also rises along the slope, it should be installed in the gap between the structure and the support base.
When the push/pull means is actuated, the upper wedge pressure receiving member lifts up the structure, and when the desired position height is reached, the wedge-shaped driving member is fixed in position by the stopper means,
It temporarily supports the structure and enables repair work on the support. [Detailed Description of the Invention] The present invention will be further described in detail with reference to the accompanying drawings. As shown in Figure 1, between a support platform 2 for supporting a structure 1 such as a bridge or an expressway, the vertical load of dead load and live load applied to the structure 1 is reliably transferred to the support platform 2. A metal support 3 is interposed in order to transmit the horizontal load in the direction perpendicular to the bridge axis due to earthquakes, wind, etc. Corrosion occurs due to direct exposure to rainwater, dust, etc., and repair or replacement work is required. However, the location where the bearing 3 is installed is
It is often installed at a height of about 20 to 30 m above the ground, which makes the work inconvenient and dangerous, and the length between the end of the support 2 and the support 3, that is, the edge distance, is 10
~30cm, and the height of the support 3 is, for example, about 10 to 20cm in a bearing plate bearing, etc., so
The gap near the support 3 is so narrow that it is impossible to install the jack, or even if it can be installed, temporary support members, etc. must be installed, which further narrows the work area and slows down the work process. However, with the present invention, structure 1 can be easily constructed.
can be provisionally supported. That is, by pushing in the length direction a wedge-shaped drive member that is associated with a push-pull means, whose movement is restricted in the width direction, and has sloped surfaces on its upper and lower surfaces, in the gap near the support, the lower surface of the wedge-shaped drive member is moved. An upper wedge pressure receiving pressure member that moves in the length direction while rising along a lower wedge pressure receiving member having an inclined surface substantially the same shape as the inclined surface, and has an inclined surface substantially the same shape as the inclined surface of the upper surface of the wedge-shaped drive member on its lower surface. Since the member rises along the slope of the upper surface of the wedge-shaped drive member, it lifts up the structure and stops pushing when it reaches a desired height, and the wedge-shaped drive member is grounded by the structure's own weight. In order to prevent the sliding rod from being pushed back in the end direction, one or more stopper plates with one side open, through which the sliding rod is inserted, are interposed between the push/pull means having a sliding rod and the wedge-shaped driving member. By doing so, the structure is supported and temporarily supported under extreme pressure. The wedge-shaped jacking device 4 used in the extreme pressure support and temporary support method will be described below. That is, as shown in FIGS. 2 and 3, there is a metal box-shaped frame member 6 that is approximately rectangular in plan view and has an opening 5 on the top surface.
is formed to a size that can be installed in the gap on the support stand 2 near the support 3, and when one short side wall 7 is the tip, there is a connection between the inner surface of the side wall 7 and the long side walls 8-8. The two metal plate members 9-9' provided are fixed with a slight gap between them. The plate member 9-9' restricts the movement of only the upper and lower guide members (described later) in the longitudinal direction, and is also provided as a reinforcement for the frame member 6 and a reaction force receiving member for the upper and lower guide members.
Two metal plate members 10-10' are also fixed to the outer surface of the short side wall 7' on the base end side at the same position, and the frame member 6
In addition, a screw hole 1 is provided approximately in the center of the plate member 10 to serve as a reinforcement for the plate member 10 and to receive a reaction force by a hydraulic jack described later.
1 is formed, and an eye bolt 12 or the like is screwed into the screw hole 11 so that it can be carried as a hook part for a rope or the like during transportation. Further, a corner portion of a substantially L-shaped plate piece 13 formed at an appropriate position on the base end side of the inner surface of the frame member 6 is joined to a corner portion of the long side wall 8-8 of the frame member 6 and the bottom plate 14. It is firmly fixed and prevents the hydraulic jack described later from rolling. Frame member 6 formed in this way
The inside has an inclined surface 15 on the upper surface which is approximately the same shape as the inclined surface of the lower surface of the wedge-shaped drive member, which will be described later, and the width direction is similar to the frame member 6.
A metal lower wedge pressure receiving member 16 which is substantially rectangular in plan view and is regulated by being slightly shorter than the inner surface of the long side wall 8-8.
The interior is arranged so that the thicker short side wall 17 and the plate member 9' are in contact with each other. Further, above the lower wedge pressure receiving member 16, a metal wedge-shaped driving member 19 having sloped surfaces 18 on the upper and lower surfaces, having the same length in the width direction as the lower wedge pressure receiving member 16, and being slightly longer in the length direction. is listed. Next, the wedge-shaped drive member 19 has an inclined surface 21 on its lower surface that is substantially the same shape as the inclined surface 18 on the upper surface, has a shorter side wall 22 that has substantially the same shape in plan view as the lower wedge pressure receiving member, and has a larger thickness, and the plate. The upper wedge pressure receiving member 23 made of metal that is in contact with the member 9 is attached to the wedge-shaped drive member 1.
9 Place the upper and lower wedge pressure receiving members 2 on top.
3 and 16 sandwich the wedge-shaped drive member 19 therebetween. The upper wedge pressure receiving member 23, the lower wedge pressure receiving member 16, and the wedge-shaped drive member 19 can be made of metal steel such as ordinary steel, stainless steel, or alloy steel, or of ceramic, plastic, etc. that can withstand high loads; The inclined surfaces 21 and 15 of the upper and lower wedge pressure receiving members 23 and 16 and the upper and lower inclined surfaces 18 of the wedge-shaped drive member 19
- 18, friction will occur when the wedge-shaped drive member 19 is moved in the future, so a Teflon plate made of tetrafluoroethylene resin or the like is used as the sliding aid plate 24, as shown in FIG. As shown in A, the inclined surfaces 21 of the upper and lower wedge pressure receiving members 23, 16
The sliding aid plate 24 may be directly attached to the surface of the sliding aid plate 24, or the sloped surface 21 of the upper and lower wedge pressure receiving members 23, 16 may be thinner than the sliding aid plate 24 and have a thickness smaller than that of the sliding aid plate 24.
15. A concave portion 25 having a shape slightly smaller than that in plan view is formed in the inclined surfaces 21, 15, and the sliding aid plate 24 is fitted and attached to the concave portion 25, or
As shown in FIG. A recess 2 similar to that described above is formed on the surface 18.
5 is formed, and the sliding aid plate 24 is fitted into the recessed portion 25 and adhered, etc., so that the sliding aid plate 24 is attached to the joint portion between the wedge-shaped drive member 19 and the upper and lower wedge pressure receiving members 23, 16. It is an intervention. At that time, the inclined surface 18 of the wedge-shaped driving member 19 and the inclined surface 2 of the upper and lower wedge pressure receiving members 23 and 16
Sliding properties can be improved by baking molybdenum disulfide on the surfaces of Nos. 1 and 15, coating with chrome plating, fixing with stainless steel plates, spraying and polishing metals such as nickel, chrome, stainless steel, etc. As the auxiliary material board 24, tetrafluoroethylene resin (hereinafter referred to as PTFE),
PTFE mixed with graphite fiber and carbon, PTFE mixed with graphite fiber and molybdenum disulfide, PTFE mixed with copper alloy, copper alloy, steel surface polished and baked with molybdenum disulfide. , a metal surface coated with a dry slide liquid, etc. can be used.
If the inclined surface has sliding properties and is strong enough to withstand use, such as special stainless steel, it can be used without the need for surface treatment as described above. Further, a plate material made of stainless steel or the like having a larger planar area than the upper wedge pressure receiving member 23 is placed as a slide plate 26 above the upper wedge pressure receiving member 23,
The slide plate 2 can be moved freely in the horizontal direction.
A thin stainless steel plate 24' is interposed between the upper wedge pressure receiving member 23 and the slide plate 26.
A buffer plate 27 made of urethane rubber or the like, which has approximately the same shape in plan view as the slide plate 26 and is somewhat elastic and has a shock absorbing ability, is placed on the upper part in order to absorb horizontality errors and slopes on the lower surface of the structure. ing. The lower wedge pressure receiving member 16, the wedge-shaped drive member 19, and the upper wedge pressure receiving member 2 housed inside the frame member 6 described above.
3 is installed in the gap on the support stand 2 near the support 3, as far as possible from the edge of the support stand 2, or the frame member 6 is first installed in the gap on the support stand 2 near the support 3. The lower wedge pressure receiving member 1
6. After installing the wedge-shaped drive member 19 and the upper wedge pressure-receiving member 23 internally, etc., the slide plate 26
and the buffer plate 27 is placed, but at this time, a plate material (not shown) is interposed between the frame member 6 and the support base 2, so that the upper surface of the buffer plate 27 and the lower surface of the structure 1 are aligned at zero. After adjusting and installing the hydraulic jack 28 so that the distance is approximately several mm, the hydraulic jack 28 is positioned on the proximal end side of the wedge-shaped drive member 19 in the length direction so that it does not roll with the plurality of plate pieces 13, and is pushed and pulled. Means 28';
By operating the hydraulic jack 28 with a friction reducing plate 30 such as a copper plate interposed between the distal end surface of the rod 29 of the hydraulic jack 28 and the proximal end surface of the wedge-shaped drive member 19, the rod 29 is connected to the wedge-shaped drive member 19.
When the proximal end surface of the wedge-shaped drive member 19 is pushed, the inclined surface 18 of the wedge-shaped driving member 19 rises while moving toward the distal end along the inclined surface 15 of the lower wedge pressure receiving member 16, and the inclined surface 21 of the upper wedge pressure receiving member 23 moves upward. rises along the slope 18 of the upper surface of the wedge-shaped drive member 19, so that the buffer plate 27 above the upper wedge pressure receiving member 23 comes into contact with the structure 1 and lifts the structure 1.
When the hydraulic jack reaches the desired position, while maintaining the pressure of the hydraulic jack, insert a metal plate-shaped stock in a substantially inverted U shape so as to be mounted on the rod 29 between the base end surface of the wedge-shaped drive member 19 and the tip of the hydraulic jack 28. Stopper means 32 for preventing the wedge-shaped drive member 19 from returning by interposing one or more par plates 31, by other appropriate means, for example, by inserting a pin into a rod and making it partially protrude, or by other appropriate means. Therefore, the structure 1 can be temporarily supported without requiring a conventional temporary support member. Since the conventional hydraulic jacking force and the vertical load including the structure's own weight were in a 1:1 ratio, it was difficult to lift heavy structures weighing several hundred to several thousand tons near the fulcrum. Therefore, the jacks naturally became larger, and there were problems such as not being able to install them in the gap near the bearing 3. However, as shown in Table 1, the jacks had a wedge-shaped slope,
The activation function enables lifting of the structure's own weight that exceeds the hydraulic jacking force. That is, as shown in Table 1,
Although the friction coefficient μ differs depending on the combination of the wedge-shaped drive member 19 and sliding aid plate 24, etc., Table 1
In this case, the vertical load R is a constant value, the friction coefficient μ is set to 0.07, 0.10, 0.15, and 0.20, and the wedge slope is 2.3° (4%) to 33° (65%) for each friction coefficient μ.
For example, when the wedge slope is 4.5° (8%), the friction coefficient μ
When 0.07, a value of 0.30R is obtained from Table 1, which indicates that lifting is possible with a hydraulic jacking force of 30% of the vertical load.
In other words, within the frame surrounded by thin lines in Table 1, the structure 1
However, in actual use,
It is preferable that the hydraulic jacking force is at least one-half of the structure's own weight, and the wedge slope is 2.3° to 2.3°.
It has been found that within the thick line frame of 8.5°, it is possible to reduce it to about 1/2 to 1/5, and furthermore, the sliding aid plate 24
When using PTFE, when removing the structure,
At the slope, the wedge-shaped drive member 19 is held between the upper and lower wedge pressure receiving members 23 and 15, and the wedge-shaped drive member 1
9 does not move toward the proximal end, and the pushing member 33 is pushed from the distal end.
However, unless a starting force is applied or a starting force is applied by pulling the proximal end with the hydraulic jack 28, the wedge-shaped drive member 19 may not return to the proximal direction. Considering various safety factors during hoisting, it is more preferable to set the weight to about 1/4 of the structure's own weight, and if the slope is set to 2.8° to 5.7° and the friction coefficient μ is set to 0.07, the structure 1/3 of own weight ~
The structure can be lifted up with a hydraulic jacking force of about 1/4, and the stopper means 3 is also used during lifting.
With the exception of 2, the wedge-shaped drive member 19 naturally moves toward the proximal end due to the weight of the structure 1, and since a small hydraulic jack can be used, the wedge-shaped jack device 4 is also naturally smaller. It can be installed in the gap near the support 3. In addition, the wedge-shaped drive member 1 of the wedge-shaped jacking device 4 is located in the gap near the support 3.
9. Lifting is possible if only the upper and lower wedge pressure receiving members 23 and 16 are located, so lifting is possible even if the hydraulic jack 28 is not located in this gap. Further, in this embodiment, a plate-shaped wedge-shaped driving member 19 is used, but if the wedge-shaped driving member 19 has slopes on the upper and lower surfaces, it can be shaped like a polygonal pyramidal wedge as shown in FIG. It is also possible to use a drive member 19', a substantially conical wedge-shaped drive member 19'', etc.
Further, in this embodiment, the wedge-shaped drive member pushed in the length direction lifts up the structure, but for example,
If the wedge-shaped jack 4 is turned over, it is also possible to move the upper wedge pressure receiving member 23 downward or sideways by pushing the wedge-shaped driving member 19 in the length direction. .

〔Effect of the invention〕

Normally, even when a structure is being lifted up, vibrations caused by vehicles etc. on the top surface of the structure are transmitted to the wedge-shaped jacking device, and the supporting members of the structure Since a slide plate is interposed between the wedge pressure receiving member and the structure, even if the structure moves slightly in the horizontal direction, the slide plate will also move, and a load will always be applied to the wedge-shaped drive member in the vertical direction. The jacking device can be safely supported without tilting, and if a buffer plate is interposed between the slide plate and the structure, the rotational force generated by the vertical and horizontal directions of the structure can be absorbed. Furthermore, by providing sliding aid plates on the joint surfaces of the wedge-shaped drive member and the upper and lower wedge pressure-receiving members, the coefficient of friction between each member can be reduced, so the hydraulic jack, which serves as a pushing and pulling means, can move the structure with less force. Since the wedge-shaped jacking device can be lifted up, the wedge-shaped jacking device can be made smaller. Further, the wedge-shaped jacking device includes the wedge-shaped drive member,
It can be disassembled into upper and lower wedge pressure receiving members, frame members, hydraulic jacks, etc., and the weight of each of these parts is such that it can be carried by hand, making it easy to move even if the support is installed at a high place. , time and costs can be significantly reduced, and the work process can be shortened. Furthermore, since the stopper means prevents the wedge-shaped drive member from moving toward the proximal end when the structure is lifted up, the structure can be supported at a desired position, and the temporary support material can be supported at a desired position. Since it is not necessary, the gap near the bearing can be used widely, making the work easier. Therefore, since each of the wedge-shaped drive member, upper and lower wedge pressure receiving members is located with the short side wall having a small thickness facing in the opposite direction to the adjacent member, the height of each member is reduced, and the height of each member is reduced. The length in the width direction can be shortened, and the structure can be lifted up with a hydraulic jacking force of less than 1/2 of the structure's own weight.Since the hydraulic jack is miniaturized, it can be installed in the gap near the support. As shown in the imaginary line in FIG. 6, by using a wedge-shaped jacking device 4 having the same surface area as the conventional jack I, _the end of the support is The distance l ₂ between B' and the wedge-shaped jacking device 4 satisfies l ₁ <l ₂ to prevent the shoulder edge of the support base from collapsing.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the support installation state, FIG. 2 is an exploded perspective view of the wedge-shaped jacking device used in the present invention,
3 is a central vertical sectional side view of the wedge-shaped jacking device with the hydraulic jack omitted, FIG. 4 is a perspective view for explaining another embodiment of the wedge-shaped drive member, FIG. 5 is a partially enlarged sectional view of the wedge-shaped jacking device, and FIG. 8 are explanatory diagrams showing conventional examples. 1...Structure, 2...Support stand, 3...Support, 4
...Wedge-shaped jacking device, 5...Opening, 6...Frame member, 7...Short side wall, 7'...Short side wall, 8...
Long side side wall, 9...Plate member, 9'...Plate member, 1
0...Plate member, 11...Threaded hole, 12...Eye bolt, 13...Plate piece, 14...Bottom plate, 15...Slanted surface, 16...Lower wedge pressure receiving member, 17...Short side wall, 18 ... Inclined surface, 19 ... Wedge-shaped drive member, 2
0... Short side wall, 21... Inclined surface, 22... Short side wall, 23... Upper wedge pressure receiving member, 24... Sliding aid plate, 25... Recess, 26... Slide plate, 27
...Buffer plate, 28...Hydraulic jack, 28'...
push/pull means, 29...rod, 30...plate material, 31
... Stopper plate, 32 ... Stopper means, 33 ... Push member.

Claims (1)

[Scope of Claims] 1. A wedge-shaped drive member that is associated with the push/pull means, whose movement is restricted in the width direction, and whose upper and lower surfaces are inclined surfaces, and which has an inclined surface that is substantially the same shape as the inclined surface of the lower surface of the wedge-shaped drive member. A lower wedge pressure receiving member is provided on the upper surface to restrict movement in the width direction and the length direction, and a lower wedge pressure receiving member is provided on the lower surface to restrict movement in the width direction and the length direction. By moving the wedge-shaped drive member in the length direction, the wedge-shaped drive member moves in the length direction along the slope of the upper surface of the lower wedge pressure-receiving member. a wedge-shaped jacking device in which the upper wedge-shaped pressure receiving member rises along an inclined surface of the upper surface of the wedge-shaped drive member is installed in the gap between the structure and the support base, and the pushing/pulling means is operated. The extreme pressure of the structure is such that the upper wedge pressure-receiving member, which rises due to Support hoisting and temporary support methods. 3 Claimed stand 1 characterized in that a metal plate-shaped slide plate is placed on the upper wedge pressure receiving member.
Method for extreme pressure support and temporary support of the structure described in Section 1. 3. Extreme pressure support and temporary support of a structure according to claim 2, characterized in that a buffer plate made of Blend rubber or the like is placed above the slide plate and has the same shape as the slide plate in plan view. Method. 4 Claims 1 to 3, characterized in that the inclination angle of the wedge-shaped drive member is set to 2.3° to 33°.
Method for extreme pressure support and temporary support of the structure described in Section 1. 5 At the joints between the wedge-shaped drive member and the upper and lower wedge pressure receiving members, and at the joints between the upper wedge pressure member and the slide plate, a plate-shaped material such as Teflon is applied to reduce the frictional resistance between these two members. 5. A method for extreme pressure support and temporary support of a structure according to claims 1 to 4, characterized in that a formed sliding aid plate is interposed. 6. As the stopper means, one or more stopper plates with one side open through which the sliding rod is inserted are interposed between the pushing/pulling means having a sliding rod and the wedge-shaped driving member, and the wedge-shaped driving member is stopped. 6. A method for extreme pressure support and temporary support of a structure according to claims 1 to 5, characterized in that movement in the length direction is restricted.