KR102739396B1 - Height adjustment device, structure support bearing that can be raised and lowered, and method of replacing structure support bearing - Google Patents

Abstract

The present invention relates to a height adjustment device for a structure support, comprising: an upper piston (110); a lower piston (120) provided below the upper piston (110); a first pressure block (210) and a second pressure block (220) provided between the upper piston (110) and the lower piston (120) so as to face each other, and characterized in that the height of the upper piston (110) is adjusted by adjusting the horizontal gap between the first pressure block (210) and the second pressure block (220), a structure support having the height adjustment device and capable of being raised and lowered, and a method for rapid replacement and maintenance of the structure support without breaking the concrete of the lower structure using the same.

Description

{Height adjustment device, structure support bearing that can be raised and lowered, and method of replacing structure support bearing}

The present invention relates to a structural support installed at a contact point between a superstructure and a substructure in civil engineering structures and architectural structures such as road bridges, railway bridges, schools, public buildings, hospitals, and data centers, and having the function of transmitting all loads transmitted from the superstructure to the substructure and accommodating movement and rotation generated from the superstructure.

More specifically, the present invention relates to a height adjustment device for a structural support, which adjusts the spacing between a pair of pressure blocks facing each other with a constant inclination angle on the upper and lower surfaces using a tension member, thereby adjusting the height between the upper piston and the lower piston located at the upper and lower portions of the pressure blocks corresponding to the inclination angle of the pressure blocks, thereby enabling a minimum amount of lifting and the same load distribution when maintaining the structural support, a structural support capable of being raised and lowered, and a method for rapid repair and replacement of the structural support without breaking the concrete of the substructure to which the same is applied.

Structural supports applied to civil and architectural structures are key elements that accommodate all upper loads, movements, and rotations that occur at all times. Due to continuous load application, movement, and rotation, damage, wear, and corrosion occur, and are usually replaced every 15 to 25 years depending on the conditions of the site of use.

To replace the support, first, the superstructure is raised using a hydraulic jack that acts as a temporary support in order to remove the existing support. At this time, the superstructure is raised using the lifting jack, usually 3 to 5 mm, and depending on the type of existing support, up to 7 mm, in order to remove the existing support.

Since the entire superstructure cannot be raised simultaneously, the raising work is carried out partially. This partial raising causes an uneven load in the vertical direction to the entire superstructure, which may cause structural problems such as partial stress concentration in the superstructure. The structural problems caused by the raising of the superstructure become greater as the amount of raising increases.

When replacing an existing support, the new support is installed after the existing support is removed while it is supported by a hydraulic jack. The new support is set without any external force, and the reinforcement bars and concrete are placed under the new support. After the curing of the poured concrete is completed, the hydraulic jack is lowered.

Only after the hydraulic jack is lowered does the load of the superstructure begin to act on the new support, and the new support itself sagging due to external force and sagging due to construction errors are combined to cause a greater hydraulic sagging than the amount raised before the support was replaced. In addition, since the construction errors of each support are different, each new support is experiencing a different amount of sagging.

The different amounts of deflection that can occur in newly replaced supports in this way can cause the supports to not support the appropriate design load, and in some supports, the design load can be exceeded, causing problems with the stability of the supports, and causing partial stress concentration in the superstructure, resulting in structural problems such as cracks and differences in expansion joints.

In particular, for railway bridges that operate on tracks, the maximum allowable increase of 3 mm when replacing supports is for the safety of the trains. However, with an increase of less than 3 mm, it is very difficult to remove the existing supports, so additional expensive equipment such as separate wire saws are often applied, or the support replacement work itself is often difficult.

After the impression jack is lowered, the new support itself sags due to load application and the sag due to construction errors becomes greater than the actual impression amount, so the superstructure is raised again, and a process of inserting a liner between the support and the superstructure is added, which has caused structural problems in the superstructure as well as problems with excessive investment in the construction budget.

When replacing existing supports, the concrete breaking process of the substructure is essential for the demolition of the existing supports, which results in additional processes for new steel reinforcement, formwork installation and dismantling, non-shrinkage mortar pouring, and curing, which not only increases costs but also lengthens the construction period and generates a large amount of waste.

Therefore, when replacing structural supports that must inevitably be replaced at regular intervals, it was necessary to minimize the amount of impression made on the superstructure to prevent structural problems in the structure, ensure that the load on all replaced supports is evenly distributed after the support replacement so that the design load is not exceeded, and reduce the cost of support replacement.

To this end, it was necessary to develop a technology that would allow the support itself to rise and fall, and furthermore, it was necessary to develop a technology that would allow for easy support replacement by utilizing the support's own rising and falling function.

Korean Patent Publication No. 10-2410271

In order to improve the problems of the prior art as described above, the present invention aims to provide a height adjustment device for a structure support having a structure capable of being raised and lowered, and a structure support capable of being raised and lowered.

The purpose of the present invention is to provide a structure support capable of being raised and lowered and a method for replacing the structure support, which enables dismantling of an existing support with a very small amount of force compared to the prior art when replacing the support.

The purpose of the present invention is to provide a structure support capable of being raised and lowered and a method for replacing a structure support, which enables proper load distribution by applying the same vertical force to all supports in advance when installing the supports, and minimizes problems with the structure due to sagging of the support itself and construction errors.

The purpose of the present invention is to provide a structure support capable of being raised and lowered, which enables easy support replacement without breaking the concrete of the substructure and reduces replacement costs, and a method for replacing the structure support.

In the present invention, a height adjusting device is provided between a support upper plate and a support lower plate to adjust the height between the support upper plate and the support lower plate, the height adjusting device of a structure support including: an upper piston (110); a lower piston (120) provided below the upper piston (110); and a first pressure block (210) and a second pressure block (220) provided between the upper piston (110) and the lower piston (120) to face each other, and the height of the upper piston (110) is adjusted by adjusting the horizontal gap between the first pressure block (210) and the second pressure block (220).

It further includes a tension member (300) connecting the first pressure block (210) and the second pressure block (220), and is characterized in that a prestress force is introduced between the first pressure block (210) and the second pressure block (220) while adjusting the horizontal gap between the first pressure block (210) and the second pressure block (220) by the tension member (300).

The angle (a) formed by the upper surface (211) of the first pressure block (210) and the upper surface (221) of the second pressure block (220) with the horizontal plane is the same, the angle (b) formed by the lower surface (212) of the first pressure block (210) and the lower surface (222) of the second pressure block (220) with the horizontal plane is the same, the angle (a) formed by the upper surface (211) of the first pressure block (210) and the upper surface (221) of the second pressure block (220) with the horizontal plane is the same as the angle (a) formed by the lower surface (112) of the upper piston (110) and the horizontal plane, and the angle (b) formed by the lower surface (212) of the first pressure block (210) and the lower surface (222) of the second pressure block (220) with the horizontal plane is the same as the angle (a) formed by the upper surface (121) of the lower piston (120) and the horizontal plane. It is characterized by the same angle as the angle (b).

The first pressure block (210) is provided with a first tension member hole (213), the second pressure block (220) is provided with a second tension member hole (223), the tension member (300) is provided with screw threads, and the second tension member hole (223) is provided with a screw tap.

A detachment prevention groove (113) is provided on the lower surface (112) of the upper piston (110), a detachment prevention groove (123) is provided on the upper surface (121) of the lower piston (120), detachment prevention projections (214) are provided on the upper surface (211) and lower surface (212) of the first pressure block (210), and detachment prevention projections (224) are provided on the upper surface (221) and lower surface (222) of the second pressure block (220).

The first pressure block (210) and/or the second pressure block (220) are provided with a rotation hole.

In the present invention, a structure support that is installed on a lower structure and supports an upper structure is provided, the structure support including: a support upper plate (11); a support lower plate (12) provided below the support upper plate (11); and a height adjustment device provided between the support upper plate (11) and the support lower plate (12). The structure support is capable of being raised and lowered.

The upper surface of the upper piston (110) is provided with an upwardly convex friction material mounting groove (114), and an upwardly convex upper friction material (115) is mounted in the friction material mounting groove (114), and the lower surface of the lower piston (120) is provided with a downwardly convex friction material mounting groove (124), and a downwardly convex lower friction material (125) is mounted in the friction material mounting groove (124).

The upper surface of the upper piston (110) is provided with a flat friction material mounting groove (114), and a flat upper friction material (115) is mounted in the friction material mounting groove (114), and the lower surface of the lower piston (120) is provided with a convex downward curved surface, and a sliding surface (126) is provided on the surface.

The upper support plate (11) is provided with a water level (17) on at least two sides that are perpendicular to each other.

It further includes a masonry plate (19) that is fixed to the upper part of the lower structure (2) by a stud anchor (191), and the supporting lower plate (12) is characterized in that it is fixed to the masonry plate (19) by a fastening bolt (18).

The present invention provides a method for replacing a structural support, comprising: a) a step of raising an upper structure; b) a step of releasing a tension member (300) to widen a horizontal gap between a first pressure block (210) and a second pressure block (220) and lower the height of an existing support; c) a step of dismantling the existing support; d) a step of inserting a new support while the support is lowered; e) a step of fastening a support upper plate (11) and a support lower plate (12) to the upper structure and a masonry plate, respectively; f) a step of tightening a tension member (300) to narrow the horizontal gap between the first pressure block (210) and the second pressure block (220) and raise the support height while introducing an upward force to the new support; g) a step of lowering a hydraulic jack.

In this invention, a method for repairing a structural support is provided, comprising: a) a step of raising an upper structure; b) a step of releasing a tension member (300) to widen a horizontal gap between a first pressure block (210) and a second pressure block (220) to lower the height of an existing support; c) a step of separating the existing support; d) a step of repairing the existing support and then inserting the support in a lowered state; e) a step of fastening an upper support plate (11) and a lower support plate (12) to the upper structure and a masonry plate, respectively; f) a step of tightening a tension member (300) to narrow the horizontal gap between the first pressure block (210) and the second pressure block (220) to raise the height of the support and introduce an upward force to the repaired support; and g) a step of lowering a hydraulic jack.

The structure support height adjustment device of the present invention, the structure support capable of being raised and lowered, and the structure support replacement method have the following effects.

First, since the height of the support itself can be lowered by the height adjusting device provided between the upper support plate and the lower support plate, the amount of lifting of the upper structure can be minimized when the support is removed and replaced. That is, in the past, the dismantling of the existing support and the installation of a new support were possible only after the support was raised by 3 to 7 mm, but in the present invention, the dismantling of the existing support and the installation of a new support are possible only if the support is raised by 1 to 2 mm or to an extent that the existing support is no longer subject to the load of the upper structure. As a result, the structural impact that may be exerted on the upper structure during the lifting process can be minimized, and since the amount of lifting is reduced compared to the past, the time and cost of the replacement work are significantly reduced.

Second, by using the tension member and the first and second pressure blocks, the same prestress force can be applied to all replaced supports in advance, enabling accurate load distribution to all replaced supports, and minimizing structural problems caused by sagging of the support itself and construction errors.

Third, by installing a water level on at least two mutually perpendicular surfaces of the structural support, the horizontality can be checked in real time when installing the support.

Fourth, by installing a masonry plate under the lower support plate, the support can be replaced quickly without breaking the structure, reducing work time and saving the budget.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

Figure 1 is an exploded cross-sectional view of the height adjustment device of the present invention.
Figures 2 and 3 illustrate adjusting the height of the upper piston by the horizontal spacing of the first and second pressurizing blocks.
Figure 4 shows the assembled state of the first and second pressurized blocks and the upper and lower pistons.
Figure 5 shows the upper piston and lower piston.
Figure 6 shows the first and second pressure blocks and tension members.
Figure 7 shows the assembled height adjustment device rotating around the vertical axis by inserting a rod into the rotation hole.
Figure 8 is a cross-sectional side view showing the structural support of the first embodiment installed on the superstructure and the substructure.
Figure 9 is a plan view and a cross-sectional view of the structural support of the first embodiment.
Figure 10 is an exploded cross-sectional view of the structural support of the first embodiment.
Figure 11 illustrates the height of the structural support of the first embodiment when the spacing between the first and second pressurized blocks is standard.
Figure 12 illustrates the height of the structural support of the first embodiment when the spacing between the first and second pressurized blocks is widened.
Figure 13 illustrates the height of the structural support of the first embodiment when the spacing between the first and second pressurized blocks is narrowed.
Figure 14 is a plan view and a cross-sectional view of the structural support of the second embodiment.
Figure 15 is an exploded cross-sectional view of the structural support of the second embodiment.
Figure 16 is a cross-sectional view of the structural support of the second embodiment.
Fig. 17 is a height adjustment device according to the second embodiment.
Figure 18 illustrates the process of dismantling an existing support.
Figure 19 illustrates the process of installing a new or repaired support.

Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein. In addition, in order to clearly describe the present invention in the drawings, parts that are not related to the description are omitted, and similar reference numerals are assigned to similar parts throughout the specification. Throughout the specification, when a part is said to "include" a certain component, this does not mean that other components are excluded, but that other components can be further included, unless specifically stated otherwise. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

First, the height adjustment device applied to the structural support is explained, and then the structural support that can be raised and lowered and the method for replacing and repairing the structural support that uses the same are explained.

Figures 1, 2, and 3 illustrate a height adjustment device (100) of a structural support of the present invention.

The height adjustment device (100) of the support structure of the present invention is provided between the upper support plate and the lower support plate.

The height adjustment device (100) of the structural support includes an upper piston (110), a lower piston (120), a first pressure block (210), a second pressure block (220), and a tension member (300). In addition, depending on the support applied, an upper friction member (115), a lower friction member (125), and a sliding surface (126) may be further included.

The height adjustment device (100) of the present invention adjusts the height between the upper piston (110) and the lower piston (120) by adjusting the horizontal gap between the first pressure block (210) and the second pressure block (220).

The upper piston (110) may have a circular or polygonal plane shape and includes an upper surface (111) and a lower surface (112).

The lower piston (120) is provided below the upper piston (110), may have a circular or polygonal plane shape, and includes an upper surface (121) and a lower surface (122).

Looking at the cross-sectional view of the upper piston (110) (see FIGS. 1, 2, and 3), the upper piston (110) has left-right line symmetry with respect to the center line, and the lower surface (112) of the upper piston (110) is provided so as to be inclined downward toward the inner center line (in some cases, the lower surface (112) may be provided in a horizontal direction instead of being inclined downward).

Looking at the cross-sectional view of the lower piston (120) (see FIGS. 1, 2, and 3), the lower piston (120) has left-right line symmetry with respect to the center line, and the upper surface (121) of the lower piston (120) is provided so as to be inclined upward toward the inner center line (in some cases, the upper surface (121) may be provided in a horizontal direction instead of an upward slope).

In the present invention, the angle formed by the upper surface (211) and the lower surface (212) of the first pressure block (210), the upper surface (221) and the lower surface (222) of the second pressure block (220), the lower surface (112) of the upper piston (110), and the upper surface (121) of the lower piston (120) and the horizontal plane is for adjusting the height of the upper piston (110) and the lower piston (120) according to the horizontal movement of the first pressure block (210) and the second pressure block (220), and therefore, as can be seen in FIGS. 1, 2, and 3, it means that the angle is formed upward or downward as it goes outward from the center of the tension member (300) along the longitudinal direction of the tension member.

The first pressure block (210) and the second pressure block (220) may have a semicircular or semi-polygonal plane shape and are provided with a symmetrical structure so as to face each other between the upper piston (110) and the lower piston (120).

The cross-sectional shape of the first pressure block (210) and the second pressure block (220) is such that the upper and lower thicknesses of the member increase from the inside to the outside.

Accordingly, as shown in FIGS. 2 and 3, as the horizontal gap between the first pressure block (210) and the second pressure block (220) becomes narrower, the height of the upper piston (110) rises, and conversely, as the horizontal gap between the first pressure block (210) and the second pressure block (220) becomes farther, the height of the upper piston (110) decreases.

The above tension member (300) connects the first pressure block (210) and the second pressure block (220) to adjust the horizontal gap between the first pressure block (210) and the second pressure block (220) while introducing a prestress force between the first pressure block (210) and the second pressure block (220).

To this end, the first pressure block (210) is provided with a first tension member hole (213), the second pressure block (220) is provided with a second tension member hole (223), the tension member (300) is provided with screw threads, and the second tension member hole (223) is provided with a screw tap.

Accordingly, after the tension member (300) is inserted into the first tension member hole (213) of the first pressure block (210), it is screwed into the second tension member hole (223) of the second pressure block (220), and the horizontal gap between the first pressure block (210) and the second pressure block (220) can be determined through tightening and loosening. In addition, when the tension member (300) is tightened, a prestress force is introduced between the first pressure block (210) and the second pressure block (220).

The tension member (300) can use a high-strength wrench bolt that is easy to tighten and loosen.

In the first pressure block (210) and the second pressure block (220), it is preferable that the minimum thickness between the uppermost and lowermost portions of the first tension member hole (213) and the detachment prevention protrusion (214) formed in the vertical upper and lower portions of the first tension member hole (213) be equal to or greater than the diameter of the tension member (300), and it is preferable that the minimum thickness between the uppermost and lowermost portions of the second tension member hole (223) and the detachment prevention protrusion (224) formed in the vertical upper and lower portions of the second tension member hole (223) be equal to or greater than the diameter of the tension member (300).

Since the load of the upper structure must be supported while the gap between the first pressure block (210) and the second pressure block (220) between the upper piston (110) and the lower piston (120) is maintained by the screw connection of the tension member (300), it is desirable to make the left and right angles of the upper and lower surfaces of each component the same for stable support and smooth horizontal gap adjustment.

That is, it is preferable that the angle (a) formed by the upper surface (211) of the first pressure block (210) and the upper surface (221) of the second pressure block (220) with respect to the horizontal plane is the same, and the angle (b) formed by the lower surface (212) of the first pressure block (210) and the lower surface (222) of the second pressure block (220) with respect to the horizontal plane is the same.

In addition, it is preferable that the angle (a) formed between the upper surface (211) of the first pressure block (210) and the upper surface (221) of the second pressure block (220) and the horizontal plane is equal to the angle (a) between the lower surface (112) of the upper piston (110) and the horizontal plane, and that the angle (b) formed between the lower surface (212) of the first pressure block (210) and the lower surface (222) of the second pressure block (220) and the horizontal plane is equal to the angle (b) between the upper surface (121) of the lower piston (120) and the horizontal plane. However, a and b may be equal or different.

Based on the cross-sectional view (Figs. 1 and 2) of the tension member (300) in the longitudinal direction, the upper piston (110) and the lower piston (120) are in a shape in which the upper and lower thicknesses of the members become thicker from the outside to the inside while forming a line symmetry with respect to the center line. Accordingly, the first pressure block (210) and the second pressure block (220) move smoothly between the lower surface (112) of the upper piston (110) and the upper surface (121) of the lower piston (120).

In addition, the angle (a) formed between the upper surface (211) of the first pressure block (210) and the upper surface (221) of the second pressure block (220) and the horizontal plane, and the angle (a) between the lower surface (112) of the upper piston (110) and the horizontal plane can be 0° or more, and the angle (b) formed between the lower surface (212) of the first pressure block (210) and the lower surface (222) of the second pressure block (220) and the horizontal plane, and the angle (b) between the upper surface (121) of the lower piston (120) and the horizontal plane can be 0° or more, and the sum of the upper and lower inclination angles (sum of a and b) is preferably 0 to 20° (FIG. 3 illustrates an example in which a is 0°).

If the sum of the upper and lower inclination angles (sum of a and b) exceeds 20°, excessive tension may be generated in the tension member due to the load of the superstructure, which may cause a problem.

Table 1 below shows examples, which show the height change amount (ΔH) of the upper piston that can be adjusted according to the horizontal gap change amount (ΔL) of the first and second pressurizing blocks when the angle between the lower surface (112) of the upper piston (110) and the horizontal plane is a, and the angle between the upper surface (121) of the lower piston (120) and the horizontal plane is b. The horizontal gap change amount (ΔL) of the first and second pressurizing blocks shows the movement amount of the first and second pressurizing blocks based on the standard state of Fig. 2 (b) (see Figs. 2 (a), (c)).

And the height change (ΔH) can be calculated by the equation below.

ΔH = ΔL x [tan(a)+tan(b)]

Inclination angle (deg) Change in spacing of pressurized blocks, ΔL (±mm) 5 10 15 20 25 30 a b Change in height of the middle plate, ΔH (±mm) 0 20 1.82 3.64 5.46 7.28 9.10 10.92 2.5 17.5 1.79 3.59 5.38 7.18 8.97 10.77 5 15 1.78 3.55 5.33 7.11 8.89 10.66 7.5 12.5 1.77 3.53 5.30 7.07 8.83 10.60 10 10 1.76 3.53 5.29 7.05 8.82 10.58 12.5 7.5 1.77 3.53 5.30 7.07 8.83 10.60 15 5 1.78 3.55 5.33 7.11 8.89 10.66 17.5 2.5 1.79 3.59 5.38 7.18 8.97 10.77 20 0 1.82 3.64 5.46 7.28 9.10 10.92

When the gap between the first and second pressure blocks increases, the height of the upper piston decreases by ΔH ((a) of FIGS. 2 and 3), and conversely, when the gap between the first and second pressure blocks decreases, the height of the upper piston increases by ΔH ((c) of FIGS. 2 and 3). The gap between the first and second pressure blocks is adjusted by tightening and loosening the tension member.

In order to prevent the upper piston (110) and the lower piston (120) and the first pressure block (210) and the second pressure block (220) from being separated in the upper and lower directions, a separation-prevention groove (113) may be provided on the lower surface (112) of the upper piston (110), a separation-prevention groove (123) may be provided on the upper surface (121) of the lower piston (120), a separation-prevention protrusion (214) may be provided on the upper surface (211) and the lower surface (212) of the first pressure block (210), and a separation-prevention protrusion (224) may be provided on the upper surface (221) and the lower surface (222) of the second pressure block (220).

The center of the above-mentioned anti-separation groove (113) and anti-separation protrusion (214) and the center of the first tension member hole (213) are positioned on the same vertical line and are provided in parallel, and the center of the above-mentioned anti-separation groove (123) and anti-separation protrusion (224) and the center of the second tension member hole (223) are positioned on the same vertical line and are provided in parallel. Here, it goes without saying that the first tension member hole (213) and the second tension member hole (223) are provided in a direction parallel to the longitudinal direction of the above-mentioned tension member (300).

In order to ensure the prevention of detachment, the detachment prevention grooves (113, 123) may be formed so that the width of the grooves increases as they go toward the inside of the grooves, and the detachment prevention protrusions (214, 224) may be formed so that the width of the protrusions increases as they go toward the ends of the protrusions.

When positioning the height adjustment device between the upper support plate and the lower support plate, it is necessary to rotate the height adjustment device within a horizontal plane. In this case, to facilitate rotation, a rotation hole (215) may be provided in the first pressure block (210) and/or a rotation hole (225) may be provided in the second pressure block (220).

The location of the rotation holes (215, 225) is formed on the side of the first pressure block (210) and the second pressure block (220) for convenience of work, so that a rod can be inserted into the rotation holes to rotate them, and a plurality of rotation holes can be provided for convenience of work.

Hereinafter, a structure support capable of being raised and lowered by applying the height adjustment device of the present invention will be described. The structure support capable of being raised and lowered of the present invention can be implemented as a first embodiment (Figs. 9 to 13) and a second embodiment (Figs. 14 to 17).

Both the first and second embodiments of the structure support (10) capable of being raised and lowered according to the present invention include an upper support plate (11), a lower support plate (12), and a height adjustment device (100), but there is a difference in their specific configuration.

In both the first and second embodiments, the support upper plate (11) can be fixed to the lower part of the upper structure (1) by a fastening bolt (18), the support lower plate (12) can be fixed to a masonry plate (19) by a fastening bolt (18), and the masonry plate (19) can be fixed to the upper part of the lower structure (2) by a stud anchor (191).

In both the first embodiment and the second embodiment, a water level (17) can be attached to the upper plate (11) of the support in order to check and monitor the horizontality in two directions when installing the support. For easy checking, it is preferable to attach the water level (17) to the side of the upper plate (11) of the support, and it is preferable to install it in at least two orthogonal directions.

Below, the height adjustment device and structure support of the first embodiment (Figs. 9 to 13) will be described first, and then the height adjustment device and structure support of the second embodiment (Figs. 14 to 17) will be described.

The lower surface of the support upper plate (11) of the first embodiment is provided with a curved surface that is concavely opened toward the bottom, and an upper sliding plate (13) having a convex shape upward is fixed thereto, and the upper surface of the support lower plate (12) is provided with a curved surface that is concavely opened toward the top, and a lower sliding plate (14) having a convex shape downward is fixed thereto, and the height adjustment device (100) of the first embodiment is provided between the upper sliding plate (13) and the lower sliding plate (14).

In order to enable the height adjustment device (100) provided between the upper sliding plate (13) and the lower sliding plate (14) to support the load of the upper structure while smoothly accommodating movement and rotation, a friction material mounting groove (114) is provided on the upper surface of the upper piston (110), and a friction material mounting groove (124) is provided on the lower surface of the lower piston (120). An upper friction material (115) is mounted in the friction material mounting groove (114), and a lower friction material (125) is mounted in the friction material mounting groove (124).

The above friction material mounting groove (114) is provided with a shape convex upward, so that an upper friction material (115) having a shape convex upward is mounted therein, and the above friction material mounting groove (124) is provided with a shape convex downward, so that a lower friction material (125) having a shape convex downward is mounted therein.

Between the upper piston (110) and the lower piston (120), the first pressurizing block (210) and the second pressurizing block (220) described above are provided.

The lower surface of the support upper plate (11) of the second embodiment is provided as a flat surface, and a flat upper sliding plate (13) is fixed thereto, and a friction material fixing groove (15) is provided on a curved surface that is concavely opened upward on the upper surface of the support lower plate (12), and a lower plate friction material (16) having a convex shape is fixed thereto, and the height adjustment device (100) of the second embodiment is provided between the flat upper sliding plate (13) and the curved lower plate friction material (16).

In order to enable the height adjustment device (100) provided between the upper sliding plate (13) and the lower plate friction material (16) to support the load of the upper structure while smoothly accommodating movement and rotation, a friction material mounting groove (114) is provided on the upper surface of the upper piston (110), and a sliding surface (126) is provided on the lower surface of the lower piston (120), and an upper friction material (115) is mounted on the friction material mounting groove (114).

The above friction material settling groove (114) is provided in a flat shape, so that a flat upper friction material (115) is settling therein, and the lower surface of the lower piston (120) is provided in a convex downward curve, so that a sliding surface (126) is provided on the surface.

The above sliding surface (126) can be provided by attaching a stainless steel plate or by chrome plating.

In the second embodiment, the first pressurizing block (210) and the second pressurizing block (220) described above are provided between the upper piston (110) and the lower piston (120).

A method for dismantling, replacing, and repairing a support for a structure capable of being raised and lowered according to the present invention is described.

In order to replace or repair a support, the existing support must first be removed. Therefore, referring to Fig. 18, the removal of the existing support is first explained.

A hydraulic jack is installed between the superstructure (1) and the substructure (2), and the superstructure (1) is raised. Unlike the conventional method where the superstructure had to be raised by 3 to 7 mm to replace the support, in the present invention, the height of the support itself can be lowered, so the raising height of the superstructure can be minimized.

The structural support of the present invention can be demolished, repaired, and replaced by raising the upper structure by only 1 to 2 mm. Preferably, the existing support can be demolished by raising it to the extent that the load of the upper structure is not applied to the existing support.

When the superstructure is raised by the hydraulic jack, the load of the superstructure acting on the existing support is released, and the space between the upper sliding plate (13) and the upper friction material (115) is separated.

By dismantling the fastening bolt (18) fastened to the upper support plate (11) and releasing the tension member (300) to widen the horizontal gap between the first pressure block (210) and the second pressure block (220), the height of the upper piston (110) is lowered, and the overall height of the existing support is lowered by 5 mm or more.

Afterwards, the fastening bolt (18) attached to the support lower plate (12) is dismantled and the existing support is removed.

Normally, the friction material and the sliding plate are responsible for the load, movement, and rotation transmitted to the structural support, so the durability of the structural support is mainly determined by the friction material and the sliding plate. If the durability of the support can be secured by replacing the friction material and the sliding plate in the existing support, the support can be maintained by repairing some of the components rather than replacing the entire support, and if not, it can be replaced with a new support.

In the case of repairs that only replace some components, the existing support is removed as described above, each component of the support is disassembled as shown in Fig. 10 or Fig. 15, and then the required components are replaced and newly installed.

When installing a repaired or new support, the first pressure block (210) and the second pressure block (220) are temporarily assembled by the tension member (300) to adjust the height of the existing support at the time of demolition, and then newly installed as shown in Fig. 19.

When inserting the support, first set the support lower plate (12) so that the fastening bolt of the support lower plate (12) fits into the fastening hole of the masonry plate (19).

Then, align the position of the fastening bolt of the support upper plate (11) with the fastening hole of the upper structure. At this time, since the upper structure moves continuously, align the position by moving the support upper plate (11) little by little.

Before tightening the tension member to introduce upward force to the support, first, the upper support plate (11) and the lower support plate (12) are fastened by the fastening bolts. Then, the tension member is tightened to increase the height of the upper piston and introduce upward force to the support. At this time, by tightening the tension member with the same torque for all supports, the same upward force can be introduced to all supports.

Afterwards, when the hydraulic jack is lowered, the load on the superstructure is reloaded and the superstructure is restored to its height before replacement. When lowering the hydraulic jack, if there is a difference from the original height of the superstructure, the hydraulic jack is raised again, and the tension member is adjusted by tightening or loosening, and then the hydraulic jack is lowered again.

Although the present invention has been described with reference to the embodiments shown in the drawings, these are merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom.

Therefore, the true technical protection scope of the present invention should be determined by the technical idea of the appended claims.

100. Height adjustment device
110. Upper piston
111. Top surface 112. Bottom surface
113. Anti-leakage home
114. Friction material mounting groove 115. Upper friction material
120. Lower piston
121. Top surface 122. Bottom surface
123. Anti-leakage home
124. Friction material mounting groove 125. Lower friction material
126. Slip surface
210. First pressurized block
211. Top surface 212. Bottom surface
213. 1st tension-free hole
214. Anti-separation protrusion
215. Rotating Hall
220. Second pressurized block
221. Top surface 222. Bottom surface
223. Second tension-free hole
224. Anti-separation protrusion
225. Rotating Hall
300. Absence of tension
10. Structural support
11. Upper support plate 12. Lower support plate
13. Upper slide 14. Lower slide
15. Friction material mounting groove 16. Lower plate friction material
17. Water level
18. Fastening bolt
19. Masonry plate 191. Stud anchor
1. Superstructure 2. Substructure

Claims (13)

In a height adjustment device provided between the upper support plate and the lower support plate to adjust the height between the upper support plate and the lower support plate,
An upper piston (110) having a circular or polygonal plane shape;
A lower piston (120) provided below the upper piston (110) and having a circular or polygonal plane shape;
A first pressure block (210) and a second pressure block (220) are provided so as to face each other between the upper piston (110) and the lower piston (120), and have a semicircular or semi-polygonal plane shape;
It includes a tension member (300) connecting the first pressure block (210) and the second pressure block (220).
By adjusting the horizontal gap between the first pressure block (210) and the second pressure block (220) by the above tension member (300), the height of the upper piston (110) is adjusted, and a prestress force is introduced between the first pressure block (210) and the second pressure block (220).
The angle (a) formed between the upper surface (211) of the first pressure block (210) and the upper surface (221) of the second pressure block (220) with the horizontal plane is the same,
The angle (b) formed by the lower surface (212) of the first pressure block (210) and the lower surface (222) of the second pressure block (220) with the horizontal plane is the same.
The angle (a) formed between the upper surface (211) of the first pressure block (210) and the upper surface (221) of the second pressure block (220) and the horizontal plane is the same as the angle (a) formed between the lower surface (112) of the upper piston (110) and the horizontal plane.
The angle (b) formed between the lower surface (212) of the first pressure block (210) and the lower surface (222) of the second pressure block (220) and the horizontal plane is the same as the angle (b) formed between the upper surface (121) of the lower piston (120) and the horizontal plane.
The first pressure block (210) is provided with a first tension member hole (213), and the second pressure block (220) is provided with a second tension member hole (223).
A screw thread is formed in the above tension member (300), and a screw tap is provided in the second tension member hole (223).
After inserting the above tension member (300) into the first tension member hole (213), it is screwed into the second tension member hole (223) and the horizontal gap between the first pressure block (210) and the second pressure block (220) can be adjusted through tightening and loosening.
Based on the longitudinal direction of the tension member (300), the cross-sectional shape of the first pressure block (210) and the second pressure block (220) is characterized in that the upper and lower thicknesses of the members become thicker from the inside to the outside.
Height adjustment device for structural support. delete delete delete In the first paragraph,
The lower surface (112) of the upper piston (110) is provided with a detachment prevention groove (113), and the upper surface (121) of the lower piston (120) is provided with a detachment prevention groove (123).
The upper surface (211) and lower surface (212) of the first pressure block (210) are provided with anti-separation protrusions (214), and the upper surface (221) and lower surface (222) of the second pressure block (220) are provided with anti-separation protrusions (224).
Height adjustment device for structural support. In the first paragraph,
The first pressure block (210) and/or the second pressure block (220) are provided with a rotation hole.
Height adjustment device for structural support. In the structural support that is installed on the substructure and supports the superstructure,
Support top plate (11);
A lower support plate (12) provided below the upper support plate (11);
Including a height adjustment device of any one of claims 1, 5 and 6 provided between the upper support plate (11) and the lower support plate (12).
A support structure capable of being raised and lowered. In Article 7,
The upper surface of the upper piston (110) is provided with an upwardly convex friction material mounting groove (114), and an upwardly convex upper friction material (115) is mounted in the friction material mounting groove (114).
The lower surface of the lower piston (120) is provided with a downwardly convex friction material mounting groove (124), and a downwardly convex lower friction material (125) is mounted in the friction material mounting groove (124).
A support structure capable of being raised and lowered. In Article 7,
The upper surface of the upper piston (110) is provided with a flat friction material mounting groove (114), and a flat upper friction material (115) is mounted in the friction material mounting groove (114).
The lower surface of the above lower piston (120) is provided with a downward convex curved surface, and a sliding surface (126) is provided on the surface.
A support structure capable of being raised and lowered. In Article 7,
The upper support plate (11) is provided with a water level (17) on at least two sides that are perpendicular to each other.
A support structure capable of being raised and lowered. In Article 7,
It further includes a masonry plate (19) that is fixed to the upper part of the substructure (2) by a stud anchor (191).
The above-mentioned support lower plate (12) is characterized in that it is fixed to the above-mentioned masonry plate (19) by a fastening bolt (18).
A support structure capable of being raised and lowered. In the method of replacing the structural support of Article 7,
a) Step of raising the superstructure;
b) A step of releasing the tension member (300) to widen the horizontal gap between the first pressure block (210) and the second pressure block (220) and lower the height of the existing support;
c) Step of dismantling the existing support;
d) a step of inserting a new support while the support is lowered;
e) A step of attaching the upper support plate (11) and the lower support plate (12) to the upper structure and the masonry plate, respectively;
f) A step of tightening the tension member (300) to narrow the horizontal gap between the first pressure block (210) and the second pressure block (220) and increase the support height while introducing an upward force to the new support;
g) comprising a step of lowering the hydraulic jack;
How to replace a structural support. In the method of repairing the structural support of Article 7,
a) Step of raising the superstructure;
b) A step of releasing the tension member (300) to widen the horizontal gap between the first pressure block (210) and the second pressure block (220) and lower the height of the existing support;
d) Step of separating the existing support;
a) Step of inserting the support in a lowered state after repairing the existing support;
Step 1) A step of attaching the upper support plate (11) and the lower support plate (12) to the upper structure and the masonry plate, respectively;
b) A step of tightening the tension member (300) to narrow the horizontal gap between the first pressure block (210) and the second pressure block (220) and raise the support height while introducing an upward force to the repaired support;
(a) comprising a step of lowering a hydraulic jack;
Method of repairing structural supports.

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