Installation structure and construction method for eliminating seismic isolation bearing lift-off

Abstract

The present invention provides an installation structure and construction method for eliminating the lifting of a seismic isolation bearing. The installation structure includes a lower pier, an upper pier, a seismic isolation bearing, a casting structure and a limiting structure. The seismic isolation bearing is arranged between the lower pier and the upper pier, the casting structure is arranged on the upper pier, and the limiting structure is arranged on the seismic isolation bearing. The present invention arranges the casting structure to perform prestressing after the construction of the building structure above the seismic isolation bearing is completed, so that the post-cast structure is cast after the overall structure is vertically lifted. Through the supporting effect of the post-cast structure, the vertical lifting of the seismic isolation bearing caused by the building structure is eliminated. The invention is applicable to different upper building structures, different tension levels, different structural forms, different types of seismic isolation bearings and lifting caused by different reasons, and has the advantages of good applicability and good anti-lifting effect.

Description

Technical Field

[0001] The present invention relates to the technical field of seismic isolation bearing construction, and in particular to an installation structure and a construction method for eliminating lift-off of a seismic isolation bearing. Background Art

[0002] Isolation bearings are usually located at the bottom of a building. For new structures, the installation of isolation bearings is often completed before the construction of the superstructure. Common isolation bearings are usually unable to withstand vertical tension or cannot withstand vertical tension for a long time. However, during the construction phase of some structures, due to the use of prestressed technology, the top plate of the isolation layer may warp and deform, causing some isolation bearings to lift off or bear upward tension. For example, in a storage tank project, the concrete outer tank will cause a certain deformation of the concrete bottom plate due to the prestressed effect, which may cause the edge bearing to lift off vertically, thereby exerting an upward pulling effect on the isolation bearing below. The present invention provides an installation structure and construction method for eliminating the lift-off of isolation bearings to solve the above problem. Summary of the Invention

[0003] The present invention provides an installation structure and a construction method for eliminating the lifting of a seismic isolation bearing, thereby eliminating the vertical lifting deformation that may occur in the seismic isolation bearing during the construction stage and ensuring the use effect of the seismic isolation bearing.

[0004] The technical solution adopted by the present invention to solve the above technical problems is:

[0005] An installation structure for eliminating the lifting of a seismic isolation support, comprising a lower buttress, an upper buttress, a seismic isolation support, a lift-off post-cast structure, and a limiting structure, wherein the seismic isolation support is arranged between the lower buttress and the upper buttress, the lift-off post-cast structure is arranged on the upper buttress, and the limiting structure is arranged on the seismic isolation support;

[0006] The seismic isolation bearing includes an upper bearing and a lower bearing, and the lift-off post-cast structure includes a fence, a pre-support, an upper embedded plate and a casting pipe. The upper embedded plate is embedded in the upper pier, and a grouting gap is provided between the upper embedded plate and the upper bearing. The pre-support is located in the grouting gap. The casting pipe is provided on the upper embedded plate and located in the upper pier. The fence is provided on the periphery of the grouting gap and is connected to the upper bearing and the upper embedded plate. A post-cast structure is provided in the grouting gap.

[0007] Furthermore, the pouring pipe includes a grouting pipe and an overflow pipe, the top openings of the grouting pipe and the overflow pipe are located on the top surface of the upper pier, and the bottom openings of the grouting pipe and the overflow pipe are located on the bottom surface of the upper embedded plate and are connected to the grouting gap.

[0008] Furthermore, the limiting structure includes a limiting plate and a limiting bolt, the limiting plate is provided with a locking hole and a lifting hole, the limiting plate is connected to the upper support and the lower support through the limiting bolt, the limiting bolt provided on the upper support is located in the lifting hole, and the limiting bolt provided on the lower support is located in the locking hole.

[0009] Furthermore, the upper support includes an upper seat plate, an upper embedded sleeve and a connecting bolt, the upper embedded sleeve is arranged on the upper embedded plate, and the connecting bolt is arranged on the upper seat plate and connected to the upper embedded sleeve.

[0010] Furthermore, the lower support includes a lower seat plate, a lower embedded sleeve and a connecting bolt, the lower embedded sleeve is arranged in the lower pier, and the connecting bolt is arranged on the lower seat plate and connected to the lower embedded sleeve.

[0011] Furthermore, a protective sleeve is provided on the connecting bolt on the upper support, and the protective sleeve is provided on the connecting bolt and is located in the grouting gap.

[0012] Furthermore, the pre-support is fixedly connected to the bottom of the upper embedded plate and is in contact with the upper support.

[0013] Furthermore, the grouting pipe is located in the middle of the upper embedded plate, and the overflow pipe is located at the side of the upper embedded plate.

[0014] A construction method for eliminating the lifting of an isolation support installation structure comprises the following steps:

[0015] S1, installation of seismic isolation bearings: carry out the construction of the lower pier, and then install the seismic isolation bearings after completion;

[0016] S2, construction of superstructure: installation of the lift-out post-cast structure, followed by construction of the upper pier and its upper building structure;

[0017] S3, prestressing: After the building structure is completed and in an unloaded state, prestressing is applied to the building structure and upper piers, causing the building structure and upper piers to deform vertically, which in turn causes the isolation bearings to deform vertically and lift off.

[0018] S4, grouting: maintaining the prestressed tension state, after the vertical deformation of the isolation bearing is stable, pour the post-cast structure in the grouting gap through the pouring pipe;

[0019] S5, locking the seismic isolation bearings: After the post-cast structure reaches the predetermined strength, the connecting bolts on the upper bearings are locked and the subsequent construction of the building structure is carried out;

[0020] S6, dismantling accessories: After the subsequent construction of the building structure is completed, the limiting structure and enclosure are dismantled to complete the construction.

[0021] Furthermore, in step S2, the installation operation of lifting and casting the structure is as follows:

[0022] Place the upper embedded plate on the upper support, connect the connecting bolt on the upper support with the upper embedded sleeve, leave a lifting gap between the connecting bolt and the upper seat plate, and then install the enclosure.

[0023] The beneficial effects of the present invention are as follows:

[0024] A lifting and post-cast structure is set up to carry out prestressing after the construction of the building structure above the isolation bearing is completed, so that the post-cast structure can be cast after the overall structure is vertically lifted. Through the supporting effect of the post-cast structure, the vertical lifting of the isolation bearing caused by the building structure is eliminated. It is suitable for different upper building structures, different tension levels, different structural forms, different types of isolation bearings and lifting due to different reasons, and has the advantages of good applicability and good anti-lifting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the installation state of the lift-off and post-casting structure of the present invention;

[0027] Figure 3 This is a schematic diagram of the connection between the seismic isolation support and the upper embedded plate of the present invention;

[0028] Figure 4 It is a schematic cross-sectional view of the lift-off and post-casting structure of the present invention;

[0029] Figure 5 This is a schematic diagram of the seismic isolation support structure of the present invention;

[0030] Figure 6 This is a schematic diagram of the upper embedded plate structure of the present invention;

[0031] Figure 7 It is a schematic diagram of the limiting structure of the present invention.

[0032] Figure markings: 1-lower pier, 2-upper pier, 3-seismic isolation bearing, 31-upper bearing, 311-upper seat plate, 312-upper embedded sleeve, 313-connecting bolt, 32-lower bearing, 321-lower seat plate, 322-lower embedded sleeve, 4-lift-off post-cast structure, 41-enclosure, 42-pre-support, 43-upper embedded plate, 44-casting pipe, 441-grouting pipe, 442-overflow pipe, 5-limiting structure, 51-limiting plate, 52-limiting bolt. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] In the description of this patent, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on this patent.

[0035] like Figure 1 、 2 As shown, an installation structure for eliminating the lifting of a seismic isolation bearing includes a lower pier 1, an upper pier 2, a seismic isolation bearing 3, a lifting and post-cast structure 4 and a limiting structure 5. The seismic isolation bearing 3 is arranged between the lower pier 1 and the upper pier 2, the lifting and post-cast structure 4 is arranged on the upper pier 2, and the limiting structure 5 is arranged on the seismic isolation bearing 3.

[0036] The working principle of the present invention is as follows: a grouting gap is reserved between the upper pier 2 and the isolation bearing 3, and the building structure above the isolation bearing is first prestressed, so that the building structure produces vertical deformation and the isolation bearing produces vertical lifting. After the vertical deformation and lifting are stable, the post-cast structure 4 is lifted and cast in the grouting gap. The solidified post-cast structure connects the isolation bearing with the upper structure. The post-cast structure produces an upward pushing effect on the building structure and a downward pressure on the isolation bearing. When the upper building structure is fully loaded or vertical deformation occurs in the later stage, the overall structure will not produce vertical deformation again due to the pre-compensation of the post-cast structure, thereby eliminating the hidden danger of vertical lifting of the isolation bearing and ensuring the stability of the entire structure during use.

[0037] like Figure 3 、 4 As shown, the seismic isolation bearing 3 includes an upper bearing 31 and a lower bearing 32, and the lifted post-cast structure 4 includes an enclosure 41, a pre-support 42, an upper embedded plate 43 and a casting pipe 44. The upper embedded plate 43 is embedded in the upper pier 2, and a grouting gap is provided between the upper embedded plate 43 and the upper bearing 31. The pre-support 42 is located in the grouting gap. The casting pipe 44 is provided on the upper embedded plate 43 and is located in the upper pier 2. The enclosure 41 is provided on the periphery of the grouting gap and is connected to the upper bearing 31 and the upper embedded plate 43. A post-cast structure is provided in the grouting gap.

[0038] Furthermore, the pre-support 42 and the pouring pipe 44 are fixedly connected to the upper embedded plate 43 to form an integrated structure. The prefabricated integrated structure is convenient for installation and improves the convenience of construction.

[0039] The upper embedded plate 43 contacts the upper support 31 through the pre-support 42, and the upper seat plate 311 is connected to the upper embedded sleeve 312 provided on the upper embedded plate 43 through the connecting bolt 313. The supporting effect of the pre-support 42 is used to form a stable grouting gap between the upper embedded plate 43 and the upper support 31. The pouring pipe 44 pre-embedded in the upper pier 2 is used to pour concrete in the grouting gap to form a post-cast structure. The post-cast structure plays a role in pre-compensation for the vertical deformation of the upper building structure.

[0040] like Figure 6 As shown, further, the casting pipe 44 includes a grouting pipe 441 and an overflow pipe 442. The top openings of the grouting pipe 441 and the overflow pipe 442 are located on the top surface of the upper pier 2, and the bottom openings of the grouting pipe 441 and the overflow pipe 442 are located on the bottom surface of the upper embedded plate 43 and are connected to the grouting gap. The grouting pipe 441 is used for grouting operations. After the grouting gap is filled with slurry, the slurry overflows from the overflow pipe 442.

[0041] like Figure 7 As shown, further, the limiting structure 5 includes a limiting plate 51 and a limiting bolt 52, and the limiting plate 51 is provided with a locking hole and a lifting hole. The limiting plate 51 is connected to the upper support 31 and the lower support 32 through the limiting bolt 52. The limiting bolt 52 provided on the upper support 31 is located in the lifting hole, and the limiting bolt 52 provided on the lower support 32 is located in the locking hole.

[0042] Preferably, the lifting hole is a waist-shaped hole arranged vertically, and when the seismic isolation support 3 is lifted upward, the limiting bolt 52 located on the upper support 31 can be displaced in the lifting hole.

[0043] like Figure 5 As shown, further, the upper support 31 includes an upper seat plate 311, an upper embedded sleeve 312 and a connecting bolt 313, the upper embedded sleeve 312 is arranged on the upper embedded plate 43, and the connecting bolt 313 is arranged on the upper seat plate 311 and connected to the upper embedded sleeve 312.

[0044] like Figure 5 As shown, further, the lower support 32 includes a lower seat plate 321, a lower embedded sleeve 322 and a connecting bolt 313, the lower embedded sleeve 322 is arranged in the lower pier 1, and the connecting bolt 313 is arranged on the lower seat plate 321 and connected to the lower embedded sleeve 322.

[0045] Furthermore, a protective sleeve is provided on the connecting bolt 313 on the upper support 31. The protective sleeve is mounted on the connecting bolt 313 and positioned in the grouting gap. The ends of the protective sleeve are respectively connected to the upper seat plate 311 and the upper embedded plate 43, sealing the threaded holes on the above structure to prevent grout from entering.

[0046] Furthermore, the pre-support 42 is fixedly connected to the bottom of the upper embedded plate 43 and contacts the upper support 31 .

[0047] Preferably, the pre-support 42 is a metal plate, which plays a supporting role and forms a grouting gap.

[0048] Furthermore, the grouting pipe 441 is located in the middle of the upper embedded plate 43 , and the overflow pipe 442 is located at the side of the upper embedded plate 43 .

[0049] In storage tank projects, the concrete outer tank is usually prestressed, which causes the bottom plate of the tank body to warp. When the bottom plate warps, the upper pier supporting the bottom plate and the upper structure of the seismic isolation support connected to it will be lifted upward. In order to avoid the lifting affecting the seismic isolation effect of the seismic isolation support, the installation structure and construction of the present invention can solve the problem of seismic isolation support lifting and deformation caused by vertical deformation of the upper structure. The present invention can be applied not only to large-load storage tank projects, but also to projects where some supports are installed after the main structure is completed, such as structural seismic isolation reconstruction and support replacement. It does not limit the type of support, and rubber supports, friction pendulum supports, and elastic slide supports are all applicable. It does not limit the type of upper building structure, nor does it limit the reason for the vertical lifting of the building structure, and has universal applicability.

[0050] A construction method for eliminating the lifting of an isolation support installation structure comprises the following steps:

[0051] S1, installation of seismic isolation bearings: construction of lower pier 1 is carried out, and after completion, installation of seismic isolation bearings 3 is carried out;

[0052] S2, construction of the superstructure: installation of the lift-out post-cast structure 4, followed by construction of the upper pier 2 and its upper building structure;

[0053] S3, prestressing: After the building structure is completed and in an unloaded state, prestressing is performed on the building structure and the upper pier 2, causing the building structure and the upper pier 2 to deform vertically, driving the seismic isolation bearing 3 to deform vertically and lift off;

[0054] S4, grouting: maintaining the prestressed tension state, after the vertical deformation of the seismic isolation support 3 is stabilized, the post-cast structure in the grouting gap is cast through the pouring pipe 44;

[0055] S5, locking the seismic isolation bearings: After the post-cast structure reaches a predetermined strength, the connecting bolts 313 on the upper bearing 31 are locked and subsequent construction of the building structure is carried out;

[0056] S6, dismantling accessories: After the subsequent construction of the building structure is completed, the limiting structure 5 and the enclosure 41 are dismantled, and the building structure is loaded to complete the construction.

[0057] Furthermore, in step S2, the installation operation of lifting the post-cast structure 4 is as follows:

[0058] Place the upper embedded plate 43 on the upper support 31 , connect the connecting bolt 313 on the upper support 31 with the upper embedded sleeve 312 , leave a lifting gap of 1-2 cm between the connecting bolt and the upper seat plate 311 , and then install the enclosure 41 .

[0059] Furthermore, in step S4, during grouting, grouting is performed from the mouth of the grouting pipe 441 at the top of the upper pier 2. When overflow occurs in the overflow pipe 442, grouting is stopped and the prestressed tensioning state is maintained until the post-cast structure reaches a predetermined strength.

[0060] Furthermore, in step S3, prestressed steel strands are used to prestress the building structure and the upper pier 2, and at the same time, the vertical deformation of the seismic isolation bearing 3 is monitored in real time. After the vertical deformation of the seismic isolation bearing 3 is blocked and stabilized and no longer changes, the current prestressed tensioning state is maintained and subsequent grouting is carried out.

[0061] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description. It is intended that all variations within the meaning and range of equivalents of the claims be embraced herein, and any reference signs in the claims should not be construed as limiting the claims to which they relate.

Claims

1. A mounting structure for eliminating the lifting of a seismic isolation support, characterized in that: It comprises a lower buttress (1), an upper buttress (2), a seismic isolation support (3), a lift-off cast-in-place structure (4) and a limiting structure (5), wherein the seismic isolation support (3) is arranged between the lower buttress (1) and the upper buttress (2), the lift-off cast-in-place structure (4) is arranged on the upper buttress (2), and the limiting structure (5) is arranged on the seismic isolation support (3); The seismic isolation support (3) includes an upper support (31) and a lower support (32), and the lift-off post-cast structure (4) includes a fence (41), a pre-support (42), an upper embedded plate (43) and a pouring pipe (44), wherein the upper embedded plate (43) is pre-embedded in the upper pier (2), a grouting gap is provided between the upper embedded plate (43) and the upper support (31), the pre-support (42) is located in the grouting gap, the pouring pipe (44) is provided on the upper embedded plate (43) and is located in the upper pier (2), the fence (41) is provided on the periphery of the grouting gap and is connected to the upper support (31) and the upper embedded plate (43), and a post-cast structure is provided in the grouting gap.

2. The installation structure for eliminating lift-off of a seismic isolation support according to claim 1, characterized in that: The pouring pipe (44) comprises a grouting pipe (441) and an overflowing pipe (442), the top openings of the grouting pipe (441) and the overflowing pipe (442) being located on the top surface of the upper pier (2), and the bottom openings of the grouting pipe (441) and the overflowing pipe (442) being located on the bottom surface of the upper embedded plate (43) and communicating with the grouting gap.

3. The installation structure for eliminating lift-off of a seismic isolation support according to claim 1, characterized in that: The limiting structure (5) includes a limiting plate (51) and a limiting bolt (52), wherein the limiting plate (51) is provided with a locking hole and a lifting hole, and the limiting plate (51) is connected to the upper support (31) and the lower support (32) through the limiting bolt (52), wherein the limiting bolt (52) provided on the upper support (31) is located in the lifting hole, and the limiting bolt (52) provided on the lower support (32) is located in the locking hole.

4. The installation structure for eliminating lift-off of a seismic isolation support according to claim 1 is characterized in that: The upper support (31) comprises an upper seat plate (311), an upper embedded sleeve (312) and a connecting bolt (313); the upper embedded sleeve (312) is provided on the upper embedded plate (43); the connecting bolt (313) is provided on the upper seat plate (311) and connected to the upper embedded sleeve (312).

5. The installation structure for eliminating lift-off of a seismic isolation support according to claim 1, characterized in that: The lower support (32) comprises a lower seat plate (321), a lower embedded sleeve (322) and a connecting bolt (313); the lower embedded sleeve (322) is arranged in the lower pier (1); and the connecting bolt (313) is arranged on the lower seat plate (321) and connected to the lower embedded sleeve (322).

6. The installation structure for eliminating lift-off of a seismic isolation support according to claim 4 is characterized in that: A protective sleeve is provided on the connecting bolt (313) on the upper support (31), and the protective sleeve is sleeved on the connecting bolt (313) and is located in the grouting gap.

7. The installation structure for eliminating lift-off of a seismic isolation support according to claim 2, characterized in that: The pre-support (42) is fixedly connected to the bottom of the upper embedded plate (43) and is in contact with the upper support (31).

8. The installation structure for eliminating lift-off of a seismic isolation support according to claim 2, characterized in that: The grouting pipe (441) is located in the middle of the upper embedded plate (43), and the overflow pipe (442) is located at the side of the upper embedded plate (43).

9. The construction method of the installation structure for eliminating the lifting of the seismic isolation bearing according to claim 4 is characterized in that: The following steps are included: S1, installing the seismic isolation bearing: constructing the lower pier (1), and after completion, installing the seismic isolation bearing (3); S2, construction of the upper structure: installation of the lifting and post-casting structure (4), and then construction of the upper pier (2) and its upper building structure; S3, prestressing: after the building structure is completed and in an unloaded state, prestressing is performed on the building structure and the upper pier (2), so that the building structure and the upper pier (2) undergo vertical deformation, which drives the seismic isolation support (3) to undergo vertical deformation and lift-off; S4, grouting: maintaining the prestressed tension state, after the vertical deformation of the seismic isolation support (3) is stabilized, pouring the post-cast structure in the grouting gap through the pouring pipe (44); S5, locking the seismic isolation support: after the post-cast structure reaches a predetermined strength, the connecting bolt (313) on the upper support (31) is locked, and subsequent construction of the building structure is carried out; S6, dismantling accessories: After the subsequent construction of the building structure is completed, the limiting structure (5) and the enclosure (41) are dismantled to complete the construction.

10. The construction method of the installation structure for eliminating lift-off of a seismic isolation support according to claim 9, characterized in that: In step S2, the installation operation of lifting the post-cast structure (4) is as follows: The upper embedded plate (43) is placed on the upper support (31), and the connecting bolt (313) on the upper support (31) is connected to the upper embedded sleeve (312), leaving a lifting gap between the connecting bolt (313) and the upper seat plate (311), and then the enclosure (41) is installed.

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