Installation method of seismic isolation support

Abstract

The application relates to the technical field of isolation support mounting, in particular to an isolation support mounting construction method, which comprises the following construction steps: S1: a pouring opening is arranged at the center of a positioning steel plate, and the production of four groups of embedded components is completed; S2: positioning and line laying; S3: positioning steel plate and embedded component mounting; S4: foundation beam reinforcement and lower supporting pier reinforcement binding; S5: initial pouring: after the completion of the support setting of the enclosure formwork, concrete is poured into a forming space surrounded by the pouring opening and the enclosure formwork, the concrete is poured to the top of the foundation beam, and the concrete is vibrated and compacted during the pouring process; S6: secondary pouring: after the final setting of the initial pouring concrete, the positioning steel plate is removed, and then the lower supporting pier concrete pouring is carried out, and the concrete is vibrated and compacted during the pouring process; S7: isolation support mounting: the isolation support and the embedded sleeve are connected and fixed through a nut; the application has the effect of improving the forming quality of the lower supporting pier and then improving the installation quality of the isolation support.

Description

Technical Field

[0001] This application relates to the field of seismic isolation bearing installation technology, and in particular to a seismic isolation bearing installation construction method. Background Technology

[0002] Seismic isolation bearings are support devices installed on structures to achieve seismic isolation requirements. They are made by adding a seismic isolation layer between the superstructure and the foundation and installing rubber seismic isolation bearings to provide a soft connection with the ground, thereby offsetting most of the vibration energy. The seismic isolation bearings are connected to the piers using pre-embedded sleeves and positioning steel plates.

[0003] Patent application number 202210801176.1 discloses a method for installing rubber seismic isolation bearings, which includes the following steps: installing the lower steel column and lower support reinforcement; welding leveling seats at the four corners; installing positioning plates with pouring ports and anchor bar holes; removing the positioning plates; installing lower anchor bars; reinstalling the positioning plates; fixing the lower anchor bars to the positioning plates; spot welding the lower anchor bars to the lower support reinforcement; installing and fixing the lower support formwork; pouring concrete; removing the positioning plates and lower support formwork; installing the seismic isolation bearings; fixing the lower anchor bars to the seismic isolation bearings; installing upper anchor bars; binding the upper support reinforcement; installing the upper steel column and upper support formwork; and pouring the upper support.

[0004] Regarding the aforementioned technologies, the central part of the positioning plate is hollowed out. However, due to the limitations of the rigidity of the positioning plate itself, the central opening should not be too large, so as to prevent the positioning plate from twisting and deforming under stress during construction, such as during concrete pouring, which would lead to inaccurate positioning. Furthermore, the concrete of the lower support is poured in one go, and it cannot be fully vibrated during the pouring process. Air bubbles in the concrete tend to accumulate at the top of the lower support and cannot be expelled, resulting in air bubble pits in the concrete at the top of the lower support, causing unevenness on the surface and affecting the installation quality of the seismic isolation bearing. Summary of the Invention

[0005] To improve the installation quality of seismic isolation bearings, this application provides a method for installing seismic isolation bearings.

[0006] The seismic isolation bearing installation method provided in this application adopts the following technical solution:

[0007] A method for installing seismic isolation bearings includes the following construction steps:

[0008] S1: Open a pouring gate at the center of the positioning steel plate and complete the fabrication of four sets of pre-embedded components;

[0009] S2: Positioning and layout: Position and layout on the concrete surface of the base plate, draw the cross center line, and mark the installation position of the embedded components;

[0010] S3: positioning steel plate, pre-embedded component installation: complete the foundation bottom bar laying, then install four groups of pre-embedded components according to the marks, and then complete the installation of the positioning steel plate;

[0011] S4: foundation beam bar, lower support pier reinforcement binding;

[0012] S5: initial pouring: complete the support setting of the enclosure formwork, then pour the concrete into the forming space surrounded by the enclosure formwork through the pouring opening, and the concrete is poured to the top of the foundation beam. The concrete is vibrated and treated during the pouring process;

[0013] S6: secondary pouring: after the initial pouring of the concrete is completed, the positioning steel plate is removed, and the concrete pouring of the lower support pier is performed. The concrete is vibrated and treated during the pouring process;

[0014] S7: installation of seismic isolation support: the seismic isolation support and the pre-embedded sleeve are connected and fixed through a nut.

[0015] By adopting the above technical scheme, the opening of the pouring opening on the positioning steel plate and the manufacturing of four groups of pre-embedded components are completed before construction, then the positioning line is positioned on the concrete surface of the bottom plate, the cross center line for positioning the lower support pier and the positioning steel plate is drawn, the installation position of the pre-embedded component is marked, the foundation bottom bar is laid, the installation of the four groups of pre-embedded components is completed according to the marks, then the installation of the positioning steel plate is completed according to the cross center line, a three-dimensional model is constructed in advance using BIM technology before the installation of the pre-embedded component, and the arrangement and binding of the foundation beam bar and the lower support pier reinforcement are sequentially performed according to the three-dimensional model to reserve the installation position of the pre-embedded component. The support setting of the enclosure formwork is completed at the preset position, then the concrete is poured into the forming space surrounded by the enclosure formwork through the pouring opening, until the concrete is poured to the top wall of the foundation beam. The concrete is vibrated and treated during the pouring process to make it dense. After the initial pouring of the concrete is completed, the positioning steel plate is removed, and the concrete pouring of the lower support pier is performed. The concrete is also vibrated and treated during the pouring process. When the concrete of the secondary pouring reaches 75% of the design strength, the seismic isolation support and the pre-embedded sleeve are connected and fixed through a nut. The designed seismic isolation support installation construction method realizes the accurate position of the pre-embedded component through the initial pouring of the concrete, eliminates the problems of flatness disturbance, bubble aggregation, and inconvenient vibration caused by the positioning steel plate during the pouring of the concrete on the top of the lower support pier after the initial pouring is completed, improves the forming quality of the lower support pier, and further improves the installation quality of the seismic isolation support.

[0016] In one specific implementation, the S1 step includes:

[0017] S11: opening a pouring opening on the positioning steel plate;

[0018] S12: fixing three anchor bars through the steel bar excess, and then connecting the anchor bars at the outermost end through the steel bar excess;

[0019] S13: fixing the pre-buried sleeve at one end of the anchor bar to form a pre-buried assembly.

[0020] By adopting the above technical scheme, the three anchor bars are fixed in advance through the steel bar excess, so that the installation time in the later stage is shortened, and the pre-buried assembly and the foundation bottom bar are connected and fixed by connecting the anchor bars at the outermost end.

[0021] In a specific implementable scheme, the S3 step comprises:

[0022] S31: laying the foundation bottom bar;

[0023] S32: fixing the anchor bar: fixing the connected anchor bar according to the mark and the foundation bottom bar;

[0024] S33: installing the positioning steel plate: aligning the positioning steel plate with the cross center line, adjusting the levelness and elevation of the positioning steel plate, and then aligning and fixing the fixing hole on the positioning steel plate with the pre-buried sleeve.

[0025] By adopting the above technical scheme, the installation of the pre-buried assembly and the positioning steel plate can be realized.

[0026] In a specific implementable scheme, the S32 step comprises:

[0027] S321: fixing the connected anchor bar according to the mark and the foundation bottom bar;

[0028] S322: making a reinforcing frame through the angle steel, and fixing and connecting the reinforcing frame with the connected anchor bar.

[0029] By adopting the above technical scheme, the designed reinforcing frame can improve the structural integrity between the connected anchor bars in the four pre-buried assemblies, improve the anti-disturbance ability of the anchor bar during the concrete pouring process, and improve the position accuracy of the pre-buried sleeve.

[0030] In a specific implementable scheme, the S6 step comprises:

[0031] S61: after the initial pouring of the concrete is finally cured, the positioning steel plate is removed;

[0032] S62: after the surface of the top wall of the foundation beam is roughened and cleaned, the pouring of the concrete of the lower pier is performed, and the concrete is vibrated and compacted;

[0033] S63: finishing and leveling.

[0034] By adopting the technical scheme, the connection reliability between the foundation beam and the concrete of the lower support pier can be improved by surface chiseling, and the problems of flatness disturbance, bubble aggregation and inconvenient vibration caused by the positioning steel plate to the concrete pouring of the top of the lower support pier can be eliminated by removing the positioning steel plate before pouring the lower support pier, so that the forming quality of the lower support pier is improved, and the installation quality of the seismic support is improved.

[0035] In one specific implementation, the ratio of the diameter of the pouring port to the side length of the positioning steel plate is 0.8, and the positioning steel plate is connected with a cross-shaped inner support, and the geometric center of the cross-shaped inner support coincides with the geometric center of the pouring port.

[0036] By adopting the technical scheme, under normal circumstances, due to the limitation of the rigidity of the positioning steel plate, the aperture of the pouring port should not be too large, so as to avoid the distortion of the positioning steel plate after being stressed in the construction process such as concrete pouring, which leads to inaccurate positioning, but by adding the cross-shaped inner support, the integrity of the positioning steel plate can be improved, and under the premise of increasing the aperture of the pouring port, the deformation of the positioning steel plate caused by disturbance in the process of positioning steel plate installation and concrete pouring can be avoided.

[0037] In one specific implementation, the thickness of the cross-shaped inner support is consistent with that of the positioning steel plate, and the top wall of the cross-shaped inner support is flush with that of the positioning steel plate.

[0038] By adopting the technical scheme, the designed cross-shaped inner support with the same thickness as the positioning steel plate can avoid affecting the flatness of the surface of the lower support pier under the premise of maintaining the supporting strength of the cross-shaped inner support.

[0039] In one specific implementation, the material of the cross-shaped inner support is Q235B.

[0040] By adopting the technical scheme, the designed cross-shaped inner support with the material of Q235B can improve the anti-deformation ability of the cross-shaped inner support itself, and further improve the anti-deformation ability of the positioning steel plate.

[0041] In one specific implementation, the distance between the hole wall of the pouring port and the edge of the positioning steel plate is 100 mm.

[0042] By adopting the technical scheme, the designed pouring port with the distance of 100 mm between the hole wall and the edge of the positioning steel plate can ensure the strength of the positioning steel plate while realizing the convenience of concrete pouring and vibration.

[0043] In one specific implementation, the number of the reinforcing frames is multiple, and the multiple reinforcing frames are arranged along the axial direction of the anchor bar.

[0044] By adopting the technical scheme, the reinforcing frames designed in a plurality of numbers can further improve the structural integrity of the four groups of pre-buried components, and further improve the position accuracy of the pre-buried sleeves.

[0045] To sum up, the present application includes at least one of the following beneficial technical effects:

[0046] 1. The designed isolation bearing installation construction method realizes the position accuracy of the pre-buried components through the primary pouring of concrete, and eliminates the problems of flatness disturbance, bubble aggregation and inconvenient vibration caused by the positioning steel plate to the top concrete pouring of the lower buttress after the positioning steel plate is removed after the primary pouring is completed, improves the forming quality of the lower buttress, and further improves the installation quality of the isolation bearing.

[0047] 2. The designed isolation bearing installation construction method can shorten the later installation time by pre-fixing the three anchor bars through the steel bar surplus, and can realize the connection and fixation of the pre-buried component and the foundation bottom bar by lengthening the outermost anchor bar.

[0048] 3. The designed isolation bearing installation construction method can strengthen the integrity of the positioning steel plate by increasing the cross-shaped inner support, avoid the deformation of the positioning steel plate and the deviation of the pre-buried sleeve caused by disturbance during the positioning steel plate installation and concrete pouring under the premise of increasing the aperture of the pouring port. BRIEF DESCRIPTION OF DRAWINGS

[0049] Figure 1 is a schematic diagram of a conventional installation structure of the isolation bearing installation construction method of the embodiment of the present application.

[0050] Figure 2 is a schematic diagram of a pre-buried component of the embodiment of the present application.

[0051] Figure 3 is a schematic diagram of a positioning steel plate and a cross-shaped inner support of the embodiment of the present application.

[0052] Figure 4 is a schematic diagram of the structure after the installation of the pre-buried component and the positioning steel plate of the embodiment of the present application is completed.

[0053] Figure 5 is a schematic diagram of the structure after the primary pouring of the embodiment of the present application is completed.

[0054] BRIEF DESCRIPTION OF DRAWINGS 1. Positioning steel plate; 11, pouring port; 2, pre-buried component; 21, anchor bar; 22, pre-buried sleeve; 3, bottom plate; 4, foundation bottom bar; 5, foundation beam; 6, lower buttress; 7, isolation bearing; 8, reinforcing frame; 9, cross-shaped inner support. DETAILED DESCRIPTION

[0055] The present application will be further described in detail below. Figures 1-5 The present application will be further described in detail below.

[0056] The application discloses a seismic isolation support installation construction method.

[0057] The seismic isolation support installation construction method comprises

[0058] S1: referring to Figure 1 , Figure 2 and Figure 3 , a pouring opening 11 is formed in the center of the positioning steel plate 1, and four groups of pre-buried components 2 are manufactured;

[0059] S11: the pouring opening 11 is formed in the positioning steel plate 1, and the diameter of the pouring opening 11 is 0.8 times the length of the positioning steel plate 1, and in the embodiment, the distance between the hole wall of the pouring opening 11 and the edge of the positioning steel plate 1 is 100 mm; in order to improve the overall structural strength of the positioning steel plate 1, a cross-shaped inner support 9 is welded on the positioning steel plate 1, the geometric center of the cross-shaped inner support 9 coincides with the geometric center of the pouring opening 11, the thickness of the cross-shaped inner support 9 is consistent with the thickness of the positioning steel plate 1, the top wall of the cross-shaped inner support 9 is flush with the top wall of the positioning steel plate 1, the width of the cross-shaped inner support 9 is 50 mm, and the material is Q235B;

[0060] S12: three anchor bars 21 are welded and fixed through steel bar excess materials, and the outermost anchor bar 21 is lengthened through the steel bar excess materials;

[0061] S13: the pre-buried sleeve 22 is fixed at one end of the anchor bar 21 to form the pre-buried component 2;

[0062] S2: positioning and line laying: referring to Figure 2 Figure 3 and Figure 4 , the positioning and line laying are performed on the concrete surface of the base plate 3, a cross center line is drawn, and the installation positions of the pre-buried components 2 are marked;

[0063] S3: referring to Figure 4 and Figure 5 , positioning steel plate 1 and pre-buried component 2 installation: the base bottom bar 4 is laid, then the four groups of pre-buried components 2 are installed according to the marks, and then the positioning steel plate 1 is installed;

[0064] S31: base bottom bar 4 laying;

[0065] S32: anchor bar 21 fixing: the lengthened anchor bar 21 is welded and fixed to the base bottom bar 4 according to the marks, and at this time, the elevation of the pre-buried sleeve 22 is consistent with the design value;

[0066] S321: the lengthened anchor bar 21 is welded and fixed to the base bottom bar 4 according to the mark positions;

[0067] S322: The reinforcing frame 8 in square structure is made by 30 angle steel, and the reinforcing frame 8 is welded and fixed with the lengthened anchor bar 21, the number of the reinforcing frame 8 is multiple, the multiple reinforcing frames 8 are arranged along the axial direction of the anchor bar 21, the number of the reinforcing frame 8 in the embodiment is two, one is welded with the body of the anchor bar 21, and the other is welded with the lengthening part of the lengthened anchor bar 21;

[0068] S33: Positioning steel plate 1 installation: align the positioning steel plate 1 with the cross center line, adjust the levelness and elevation of the positioning steel plate 1, and then align and fix the fixing hole on the positioning steel plate 1 with the embedded sleeve 22;

[0069] S4: Foundation beam reinforcement and lower support pier reinforcement binding, before installing the embedded assembly 2, a simulated three-dimensional model is constructed by using BIM technology in advance, and the foundation beam reinforcement and the lower support pier reinforcement are arranged according to the three-dimensional model to reserve the installation position of the embedded assembly 2, so as to solve the problem of difficult installation of the embedded sleeve 22 due to insufficient space, and improve the installation construction efficiency and quality of the embedded sleeve 22;

[0070] S5: Refer to Figure 5 , initial pouring: after the support of the enclosure formwork is completed, the concrete is poured into the forming space surrounded by the enclosure formwork from the pouring opening 11, the concrete is poured to the top of the foundation beam 5, and the concrete is vibrated and compacted during the pouring process;

[0071] S6: Secondary pouring: after the final setting of the initial poured concrete, the positioning steel plate 1 is removed, and the concrete pouring of the lower support pier 6 is carried out, and the concrete is vibrated and compacted during the pouring process;

[0072] S61: After the final setting of the initial poured concrete, the positioning steel plate 1 is removed;

[0073] S62: After the surface of the top wall of the foundation beam 5 is roughened and cleaned, the pouring of the concrete of the lower support pier 6 is carried out, and the concrete is vibrated and compacted;

[0074] S63: Surface collection and leveling;

[0075] S7: Installation of the seismic isolation support 7: the seismic isolation support 7 and the embedded sleeve 22 are connected and fixed by the nut.

[0076] The implementation principle of the isolation bearing mounting construction method of the embodiment of the application is as follows: the opening of the pouring port 11 on the positioning steel plate 1 and the manufacturing of the four groups of pre-buried components 2 are completed in advance before construction, then the positioning wire is laid on the concrete surface of the bottom plate 3, the cross center line for positioning the lower support pier 6 and the positioning steel plate 1 is drawn, and the marking of the installation position of the pre-buried component 2 is completed, then the laying of the foundation bottom bar 4 is performed, the installation of the four groups of pre-buried components 2 is completed according to the marking, then the installation of the positioning steel plate 1 is completed according to the cross center line, a three-dimensional model is constructed in advance by using the BIM technology before the installation of the pre-buried component 2, and the arrangement and binding and fixing of the foundation beam bar and the lower support pier steel bar are sequentially performed according to the three-dimensional model, so as to reserve the installation position of the pre-buried component 2, the support and setting of the enclosure formwork is completed at the preset position, then the concrete is poured into the forming space surrounded by the enclosure formwork through the pouring port 11, until the concrete is poured to the top wall of the foundation beam 5, the concrete is vibrated and compacted during the pouring process, after the primary poured concrete is finally cured, the positioning steel plate 1 is removed, then the concrete pouring of the lower support pier 6 is performed, the concrete is also vibrated and compacted during the pouring process, and when the secondary poured concrete reaches 75% of the design strength, the isolation bearing 7 and the pre-buried sleeve 22 are connected and fixed through the nut.

[0077] The above are preferred embodiments of the application, and do not limit the protection scope of the application, so that: any equivalent changes made according to the structure, shape, principle of the application should be covered in the protection scope of the application.

Claims

1. A method of installing a seismic isolation bearing, characterized by: The construction steps include: S1: a pouring opening (11) is formed in the center of a positioning steel plate (1), and four groups of embedded components (2) are manufactured; S2: positioning and line laying: positioning and line laying are performed on the concrete surface of a base plate (3), a cross center line is drawn, and the installation positions of the embedded components (2) are marked; S3: positioning steel plate (1) and embedded component (2) installation: base bottom reinforcement (4) laying is completed, then the installation of the four groups of embedded components (2) is performed according to the marks, and the installation of the positioning steel plate (1) is completed; S4: base beam reinforcement and lower support pier reinforcement binding; S5: initial pouring: after the setting of the enclosure formwork is completed, the concrete is poured into the forming space surrounded by the enclosure formwork from the pouring opening (11), the concrete is poured to the top of the base beam (5), and the concrete is vibrated and compacted during the pouring process; S6: secondary pouring: after the initial pouring of the concrete is completed, the positioning steel plate (1) is removed, and the concrete pouring of the lower support pier (6) is performed, and the concrete is vibrated and compacted during the pouring process; S7: installation of the shock isolation support (7): the shock isolation support (7) and the embedded sleeve are connected and fixed through a nut. The S1 step includes: S11: a pouring opening (11) is formed in the positioning steel plate; S12: three anchor bars (21) are fixed through the steel bar excess, and the outermost anchor bar (21) is lengthened through the steel bar excess; S13: the embedded sleeve (22) is fixed to one end of the anchor bar (21) to form the embedded component (2); The S3 step includes: S31: base bottom reinforcement (4) laying; S32: anchor bar (21) fixing: the lengthened anchor bar (21) is fixed to the base bottom reinforcement (4) according to the marks; S33: positioning steel plate (1) installation: the positioning steel plate (1) is aligned with the cross center line, the levelness and the elevation of the positioning steel plate (1) are adjusted, and then the fixing hole in the positioning steel plate (1) is aligned and fixed with the embedded sleeve (22); The S32 step includes: S321: the lengthened anchor bar (21) is fixed to the base bottom reinforcement (4) according to the marks; S322: a reinforcing frame (8) is made through an angle steel, and the reinforcing frame (8) is fixedly connected with the lengthened anchor bar (21).

2. The installation method of the seismic isolation bearing according to claim 1, characterized in that: The S6 step includes: S61: after the initial pouring of the concrete is completed, the positioning steel plate (1) is removed; S62: after the surface of the top wall of the base beam (5) is roughened and cleaned, the pouring of the concrete of the lower support pier (6) is performed, and the concrete is vibrated and compacted; S63: surface collection and leveling.

3. The installation method of the seismic isolation bearing according to claim 1, characterized in that: The diameter of the pouring opening (11) and the side length of the positioning steel plate (1) have a ratio of 0.8, and the positioning steel plate (1) is connected with a cross-shaped inner support (9), and the geometric center of the cross-shaped inner support (9) coincides with the geometric center of the pouring opening (11).

4. The installation method of the seismic isolation bearing according to claim 3, characterized in that: The thickness of the cross-shaped inner support (9) and the positioning steel plate (1) is consistent, and the top walls of the cross-shaped inner support (9) and the positioning steel plate (1) are flush.

5. The installation method of the seismic isolation bearing according to claim 3, characterized in that: The material of the cross-shaped inner support (9) is Q235B.

6. The installation method of the seismic isolation bearing according to claim 3, characterized in that: The distance between the hole wall of the pouring opening (11) and the edge of the positioning steel plate (1) is 100 mm.

7. The installation method of the seismic isolation bearing according to claim 1, characterized in that: The number of the reinforcing frames (8) is multiple, and the multiple reinforcing frames (8) are arranged along the axial direction of the anchor bars (21).

Images