Tension balance type anti-seismic vibration isolation foundation

Abstract

The utility model discloses a tension balance type anti-seismic and vibration-isolation foundation, relates to a foundation used in an earthquake area, and solves the problem that the existing anti-seismic and vibration-isolation foundation is poor in anti-seismic and vibration-isolation effect. Comprising an upper support, a lower support, a sphere and a tensioning piece, the upper support comprises a top plate and an upper supporting piece fixed to the bottom face of the top plate, an upper spherical hinge bowl buckle is arranged at the bottom of the upper supporting piece, and a lower spherical hinge bowl buckle is arranged at the bottom of the lower supporting piece. The lower support comprises a bottom plate and a lower supporting piece fixed to the top face of the bottom plate, a lower spherical hinge bowl buckle is arranged at the top of the lower supporting piece, the sphere is placed between the upper spherical hinge bowl buckle and the lower spherical hinge bowl buckle and forms a spherical hinge structure, at least three tensioning pieces are further arranged between the upper support and the lower support, and a damper is arranged on each tensioning piece. The anti-seismic and vibration-isolating device is used for anti-seismic and vibration-isolating of small buildings and light structure foundations.

Description

Technical Field

[0001] The utility model relates to a foundation for earthquake zones, in particular to a tensioned balanced earthquake-resistant and vibration-isolating foundation and a construction method of the foundation. Background Art

[0002] Seismic vibration isolation foundations are mostly used for the foundations of bridges, high-rise buildings and other buildings to reduce the adverse effects of earthquakes and vibrations on the upper structures. At present, seismic vibration isolation foundations are mostly used for large buildings, which have the disadvantages of complex structure, high construction cost and difficulty in replacement. They are less applicable to small building foundations and light structure foundations.

[0003] The patent application publication number CN 113186810 A discloses a connection hinge suitable for prefabricated bridge piers, including an upper plate, a lower plate, prestressed tendons and a buckling restraint support. The upper plate is arranged at the bottom of the pier column, and the lower plate is fixed on the pedestal. The middle area of ​​the upper plate and the lower plate is in spherical contact and forms a ball joint structure. The buckling restraint support is arranged between the upper plate and the lower plate and is located around the ball joint structure. Under the action of an earthquake, the ball joint head of the upper plate and the ball joint socket of the lower plate rotate relative to each other, extending the structural period. The buckling restraint support between the upper plate and the lower plate dissipates energy through its own (core material) plastic deformation, and has the dual functions of a common support and an energy-absorbing component. It can be replaced after the earthquake. The prestressed tendons between the upper plate and the lower plate are in an elastic state, and the prestressed tendons provide a restoring force to achieve the function of self-reset. The above patent dissipates energy through the plastic deformation of the buckling restraint support. The buckling restraint support cannot recover by itself after plastic deformation. The swing of the upper plate within the plastic deformation range of the buckling restraint support cannot continue to dissipate energy through the plastic deformation of the buckling restraint support, resulting in poor energy dissipation effect. In addition, the buckling restraint support needs to be replaced after one use. In order to achieve the replacement of the buckling restraint support, the gap between the upper plate and the lower plate, as well as the outer sides of the upper plate and the lower plate are not filled with any structure or any material, otherwise the filled material will hinder the replacement of the buckling restraint support. The overturning moment is completely balanced by the prestressed tendons and the restoring moment generated by the buckling restraint support, resulting in high strength requirements for the prestressed tendons, a large number of tendons, and a relatively complex structure. Utility Model Content

[0004] The utility model firstly provides a tensioned balanced earthquake-resistant vibration isolation foundation, which solves the problem that the earthquake-resistant vibration isolation effect of the existing earthquake-resistant vibration isolation foundation is not good.

[0005] The technical scheme adopted by the utility model is: a tensioned balanced seismic and vibration-isolating foundation, comprising a support structure located on the top surface of the foundation bearing layer and a vibration-damping filler filled around the outside of the support structure, the support structure comprising an upper support, a lower support, a sphere and a tensioning member, the upper support comprising a top plate and an upper support member fixed to the bottom surface of the top plate, an upper ball hinge bowl buckle is arranged at the bottom of the upper support member, and the opening of the upper ball hinge bowl buckle faces downward, the lower support comprises a bottom plate and a lower support member fixed to the top surface of the bottom plate, a lower ball hinge bowl buckle is arranged at the top of the lower support member, and the opening of the lower ball hinge bowl buckle faces upward, the upper ball hinge bowl buckle and the lower ball hinge bowl buckle correspond to each other and are adapted to the sphere, the sphere is placed between the upper ball hinge bowl buckle and the lower ball hinge bowl buckle to form a ball hinge structure, a gap is reserved between the upper ball hinge bowl buckle and the lower ball hinge bowl buckle, at least three tensioning members are also arranged between the upper support and the lower support, a damper is arranged on each tensioning member, and each tensioning member is distributed around the ball hinge structure.

[0006] According to the stress of the vibration-damping filler, further: the outer contour of the vibration-damping filler on the vertical section is an isosceles trapezoid that is larger at the top and smaller at the bottom, and the distance between the top plate of the upper support and the bottom plate of the lower support is equal to the height of the isosceles trapezoid.

[0007] Specifically: the vibration-damping filler includes graded pebbles and graded gravels that are layered and staggered, and the gaps between the graded pebbles and the graded gravels are filled with foamed expansion sealing plugging materials.

[0008] In order to utilize the upper ball hinge cup buckle and the lower ball hinge cup buckle to control the relative rotation angle of the two in the horizontal plane, further: the upper ball hinge cup buckle and the lower ball hinge cup buckle have mutually adapted tooth mouth structures, and the width of the mouth is greater than the width of the tooth.

[0009] In order to ensure the strength of the support member and the lower support member, further: the upper support member and the lower support member are radial in the horizontal section and have at least three radial lines, the central angle formed by any two adjacent radial lines is equal, and the plate surface of the plate member corresponding to each radial line is arranged vertically. For example, the upper support member and the lower support member are both cross-shaped in the horizontal section, the top plate and the bottom plate are both square, and four tension members are arranged between the four corners of the top plate and the four corners of the bottom plate.

[0010] In order to ensure the material strength of the support structure, specifically: the support structure is entirely made of steel parts and the sphere is a solid steel ball.

[0011] Specifically: the damper on the tension member is a building viscous damper.

[0012] The utility model also provides a construction method of a tensioned balanced earthquake-resistant vibration isolation foundation, which is used for the construction of the tensioned balanced earthquake-resistant vibration isolation foundation, and also solves the problem that the existing earthquake-resistant vibration isolation foundation has poor earthquake-resistant vibration isolation effect. The construction method of the tensioned balanced earthquake-resistant vibration isolation foundation includes the following steps S1 to S4.

[0013] S1. Excavate foundation pit and construct foundation bearing layer in the foundation pit.

[0014] S2. Install the support structure on the top surface of the foundation bearing layer, first install the lower support and adjust the position of the lower support, then place the sphere in the lower ball joint buckle, then install the upper support, form a ball joint structure between the upper support and the lower support, and finally install at least three tension members between the upper support and the lower support, each tension member is respectively provided with a damper, and each tension member is distributed around the ball joint structure. Among them, the support structure includes an upper support, a lower support, a sphere and a tension member, the upper support includes a top plate and an upper support member fixed to the bottom surface of the top plate, an upper ball joint buckle is provided at the bottom of the upper support member, and the opening of the upper ball joint buckle faces downward, the lower support includes a bottom plate and a lower support member fixed to the top surface of the bottom plate, a lower ball joint buckle is provided at the top of the lower support member, and the opening of the lower ball joint buckle faces upward, the upper ball joint buckle and the lower ball joint buckle correspond to each other and are adapted to the sphere, and a gap is reserved between the upper ball joint buckle and the lower ball joint buckle.

[0015] In order to utilize the upper ball hinge cup buckle and the lower ball hinge cup buckle to control the relative rotation angle of the two in the horizontal plane, further: the upper ball hinge cup buckle and the lower ball hinge cup buckle have mutually adapted tooth mouth structures, and the width of the mouth is greater than the width of the tooth.

[0016] In order to ensure the strength of the support member and the lower support member, further: the upper support member and the lower support member are radial in the horizontal section and have at least three radial lines, the central angle formed by any two adjacent radial lines is equal, and the plate surface of the plate member corresponding to each radial line is arranged vertically. For example, the upper support member and the lower support member are both cross-shaped in the horizontal section, the top plate and the bottom plate are both square, and four tension members are arranged between the four corners of the top plate and the four corners of the bottom plate.

[0017] In order to ensure the material strength of the support structure, specifically: the support structure is entirely made of steel parts and the sphere is a solid steel ball.

[0018] Specifically: the damper on the tension member is a building viscous damper.

[0019] S3. Install the superstructure on the top surface of the support structure.

[0020] S4. Fill the foundation pit with vibration-damping filler to the top of the support structure.

[0021] According to the stress of the vibration-damping filler, further: the outer contour of the vibration-damping filler on the vertical section is an isosceles trapezoid that is larger at the top and smaller at the bottom, and the distance between the top plate of the upper support and the bottom plate of the lower support is equal to the height of the isosceles trapezoid.

[0022] Specifically: the vibration-damping filler includes graded pebbles and graded gravels that are filled in layers and staggered, and the gaps between the graded pebbles and graded gravels are filled with foaming expansion sealing plugging materials. For example, by weight, the graded pebbles account for 40% to 60% of the vibration-damping filler, and the graded gravels account for 30% to 50% of the vibration-damping filler.

[0023] The beneficial effects of the utility model are as follows: the outer periphery of the support structure is filled with vibration-damping fillers. Under the action of earthquakes, the tensioning members and the vibration-damping fillers both play the role of energy dissipation and shock reduction. Tensioning members are provided on opposite sides of the support structure, wherein the tensioning members on one side are subjected to tension and the tensioning members on the other side are subjected to compression, so as to avoid the problem that the tensioning members are completely used for energy dissipation and shock reduction, thereby causing the problem that the force requirements of the tensioning members are too high. A damper is provided on the tensioning member, and the tensioning member can be stretched and deformed multiple times. The tensioning member will not fail after being used once. Within the range of the allowable deformation of the tensioning member, during the entire period of the earthquake, the tensioning member can effectively dissipate energy and shock, thereby ensuring the effect of earthquake-resistant vibration isolation. The outer periphery of the support structure is filled with vibration-damping fillers, and the overall stability is high and the service life is long. The tensioned balanced earthquake-resistant vibration isolation foundation has a simple composition, convenient construction, and low manufacturing cost. By adopting a simple force transmission mode, the support structure adopts a detachable mechanical connection method, which is easy to install and has a low construction cost, and can meet the earthquake-resistant vibration isolation requirements of small buildings and light structural foundations. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the tensioned balanced earthquake-resistant vibration isolation foundation of the utility model.

[0025] Figure 2 yes Figure 1 Schematic diagram of the structure of the vibration-damping filler.

[0026] Figure 3 yes Figure 1 Exploded view of the support structure in .

[0027] Figure numerals: foundation bearing layer 1, vibration-damping filler 2, graded pebbles 21, graded gravel 22, foamed expansion sealing material 23, upper support 3, top plate 31, upper support member 32, upper ball hinge bowl buckle 33, lower support 4, bottom plate 41, lower support member 42, lower ball hinge bowl buckle 43, sphere 5, tensioning member 6, damper 7, upper structure 8. DETAILED DESCRIPTION

[0028] The utility model will be further described below in conjunction with the accompanying drawings.

[0029] The first subject of the utility model is a tension-balanced anti-seismic vibration isolation foundation. Figure 1As shown, the tension-balanced seismic isolation foundation includes a support structure located on the top surface of the foundation bearing layer 1 and a vibration-damping filler 2 filled around the outside of the support structure. The vibration-damping filler 2 surrounds the support structure and has multiple characteristics such as compactness, compressibility, and vibration-damping properties. According to the force of the vibration-damping filler 2 and considering that the foundation pit is also in a shape of being larger at the top and smaller at the bottom, the outer contour of the vibration-damping filler 2 on the vertical section is in a shape of being larger at the top and smaller at the bottom, for example, see Figure 1 and Figure 2 , the outer contour of the vibration-damping filler 2 on the vertical section is an isosceles trapezoid with a larger upper part and a smaller lower part. The vibration-damping filler 2 completely surrounds the support structure, for example, the distance between the top plate 31 of the upper support 3 and the bottom plate 41 of the lower support 4 is equal to the height of the isosceles trapezoid. The vibration-damping filler 2 plays a role in vibration damping, so it is required to be compressible and deformable. For example, the vibration-damping filler 2 includes graded pebbles 21 and graded gravels 22 that are filled in layers and staggered, and the gap between the graded pebbles 21 and the graded gravels 22 is filled with a foaming expansion sealing plugging 23. For another example, by weight, the graded pebbles 21 account for 40% to 60% of the vibration-damping filler 2, and the graded gravels 22 account for 30% to 50% of the vibration-damping filler 2. The graded pebbles 21 and the graded gravels 22 are filled in layers, and after filling, the gap between the two is filled with a foaming expansion sealing plugging 23 to ensure density.

[0030] The support structure mainly supports the upper structure 8. Figure 1 and Figure 3The support structure includes an upper support 3, a lower support 4, a sphere 5 and a tensioning member 6. The upper support 3 includes a top plate 31 and an upper support member 32 fixed to the bottom surface of the top plate 31. The bottom of the upper support member 32 is provided with an upper ball hinge 33, and the opening of the upper ball hinge 33 faces downward. The upper support member 32 directly supports the top plate 31 and the upper ball hinge 33. In order to improve the bearing capacity of the upper support member 32, the upper support member 32 is radial in the horizontal section and has at least three radial lines. The central angles formed by any two adjacent radial lines are equal, and the plate surface of each radial line corresponding to the plate is arranged vertically. For example, the upper support member 32 is Y-shaped, cross-shaped or M-shaped in the horizontal section. For another example, the upper support member 32 and the lower support member 42 are both cross-shaped in the horizontal section, and the top plate 31 and the bottom plate 41 are both square. The upper ball hinge 33 is bowl-shaped and can be welded and fixed to the lower end of the upper support member 32. The lower support 4 has the same structure as the upper support 3, but is placed in the opposite direction. The lower support 4 includes a bottom plate 41 and a lower support member 42 fixed to the top surface of the bottom plate 41. A lower ball hinge 43 is arranged on the top of the lower support member 42, and the opening of the lower ball hinge 43 faces upward. The upper ball hinge 33 and the lower ball hinge 43 correspond to each other and are adapted to the sphere 5, ensuring that the sphere 5 can be placed in the upper ball hinge 33 and the lower ball hinge 43. The sphere 5 is placed between the upper ball hinge 33 and the lower ball hinge 43 to form a ball hinge structure. The radius of the sphere 5 is consistent with the radius of the inner cavity of the upper ball hinge 33 and the radius of the inner cavity of the lower ball hinge 43, so that the contact area between the sphere 5 and the upper ball hinge 33 and the lower ball hinge 43 is as large as possible. A gap is reserved between the upper ball hinge 33 and the lower ball hinge 43 so that the ball hinge structure can rotate within a certain angle range. In order to ensure the material strength of the support structure, the support structure is entirely made of steel and the ball 5 is a solid steel ball.

[0031] At least three tension members 6 are also arranged between the upper support 3 and the lower support 4, and a damper 7 is arranged on each tension member 6. The tension members 6 are distributed around the ball joint structure, and preferably evenly distributed around the ball joint structure. The tension members 6 and the dampers 7 need to withstand a large force, so the dampers 7 on the tension members 6 are preferably architectural viscous dampers. For example, the upper support member 32 and the lower support member 42 are both cross-shaped in horizontal cross-section, the top plate 31 and the bottom plate 41 are both square, and four tension members 6 are arranged between the four corners of the top plate 31 and the four corners of the bottom plate 41. In order to facilitate the installation of the tension members 6, zipper buckles are respectively arranged at the four corners of the top plate 31 and the four corners of the bottom plate 41 for easy connection with the tension members 6. The tensioning member 6 can limit the rotation of the upper support 3 and the lower support 4 in the horizontal plane, wherein the rotation in the horizontal plane refers to the vertical axis of rotation. In order to use the upper ball hinge cup buckle 33 and the lower ball hinge cup buckle 43 to control the relative rotation angle of the two in the horizontal plane, and also to facilitate the alignment of the upper ball hinge cup buckle 33 and the lower ball hinge cup buckle 43, the tooth mouth structure between the upper ball hinge cup buckle 33 and the lower ball hinge cup buckle 43 is adapted to each other. The tooth mouth structure refers to the edges of the upper ball hinge cup buckle 33 and the lower ball hinge cup buckle 43 are respectively provided with notches, and teeth are naturally formed between the notches. The tooth mouth structure refers to the width of the mouth is greater than the width of the teeth, so that the upper ball hinge cup buckle 33 and the lower ball hinge cup buckle 43 can rotate relative to a certain angle in the horizontal plane.

[0032] The second subject of the utility model is a construction method of a tensioned balanced earthquake-resistant vibration isolation foundation, which is used for the construction of the tensioned balanced earthquake-resistant vibration isolation foundation of the first subject. The construction method of the tensioned balanced earthquake-resistant vibration isolation foundation includes the following steps S1 to S4.

[0033] S1. Excavate a foundation pit and construct a foundation bearing layer 1 in the foundation pit. The foundation bearing layer 1 is generally a concrete structure, which plays a role in leveling and improving the bearing capacity of the foundation.

[0034] S2. Install the support structure on the top surface of the foundation bearing layer 1. The construction process of the support structure is to first install the lower support 4 and adjust the position of the lower support 4 to ensure that the position of the lower support 4 is accurate and remains vertical; then place the sphere 5 in the lower ball hinge bowl buckle 43, and then install the upper support 3, forming a ball hinge structure between the upper support 3 and the lower support 4; finally, install at least three tension members 6 between the upper support 3 and the lower support 4, and each tension member 6 is provided with a damper 7, and each tension member 6 is distributed around the ball hinge structure. Please refer to the description of the support structure in the first topic above for the support structure, which will not be repeated here.

[0035] S3. Install the superstructure 8 on the top surface of the support structure.

[0036] S4, filling the foundation pit with vibration-proof filler 2 to the top of the support structure. The vibration-proof filler 2 is described in the first subject above, and will not be repeated here.

Claims

1. The tension-balanced seismic isolation foundation is characterized by: The invention comprises a support structure located on the top surface of a foundation bearing layer (1) and a vibration-damping filler (2) filled around the outside of the support structure. The support structure comprises an upper support (3), a lower support (4), a sphere (5) and a tensioning member (6). The upper support (3) comprises a top plate (31) and an upper support member (32) fixed to the bottom surface of the top plate (31). An upper ball hinge (33) is arranged at the bottom of the upper support member (32). The opening of the upper ball hinge (33) faces downward. The lower support (4) comprises a bottom plate (41) and a lower support member (42) fixed to the top surface of the bottom plate (41). The lower support member (42) is provided with a ball hinge (33). A lower ball-joint bowl buckle (43) is arranged at the top, the opening of the lower ball-joint bowl buckle (43) faces upward, the upper ball-joint bowl buckle (33) and the lower ball-joint bowl buckle (43) correspond to each other and are adapted to the sphere (5), the sphere (5) is placed between the upper ball-joint bowl buckle (33) and the lower ball-joint bowl buckle (43) to form a ball-joint structure, a gap is reserved between the upper ball-joint bowl buckle (33) and the lower ball-joint bowl buckle (43), at least three tensioning members (6) are arranged between the upper support (3) and the lower support (4), a damper (7) is arranged on each tensioning member (6), and each tensioning member (6) is distributed around the ball-joint structure.

2. The tension-balanced seismic-resistant and vibration-isolating foundation according to claim 1, characterized in that: The outer contour of the vibration-damping filler (2) on a vertical cross section is an isosceles trapezoid that is larger at the top and smaller at the bottom, and the distance between the top plate (31) of the upper support (3) and the bottom plate (41) of the lower support (4) is equal to the height of the isosceles trapezoid.

3. The tension-balanced seismic isolation foundation according to claim 1, characterized in that: The vibration-damping filler (2) comprises graded pebbles (21) and graded gravels (22) which are filled in layers and staggered, and the gaps between the graded pebbles (21) and the graded gravels (22) are filled with foaming expansion sealing plugging materials (23).

4. The tension-balanced seismic-resistant and vibration-isolating foundation according to claim 1, characterized in that: The upper ball hinge cup buckle (33) and the lower ball hinge cup buckle (43) have mutually adapted tooth opening structures, and the width of the opening is greater than the width of the teeth.

5. The tension-balanced seismic-resistant and vibration-isolating foundation according to any one of claims 1 to 4, characterized in that: The upper support member (32) and the lower support member (42) are radial in a horizontal cross section and have at least three radial lines, the central angles formed by any two adjacent radial lines are equal, and the plate surface of the plate member corresponding to each radial line is arranged vertically.

6. The tension-balanced seismic-resistant and vibration-isolating foundation according to claim 5, characterized in that: The upper support member (32) and the lower support member (42) are both cross-shaped in horizontal cross-section, the top plate (31) and the bottom plate (41) are both square, and four tension members (6) are arranged between the four corners of the top plate (31) and the four corners of the bottom plate (41).

7. The tension-balanced seismic-resistant and vibration-isolating foundation according to any one of claims 1 to 4, characterized in that: The support structure is entirely made of steel, and the sphere (5) is a solid steel ball.

8. The tension-balanced seismic-resistant and vibration-isolating foundation according to any one of claims 1 to 4, characterized in that: The damper (7) on the tensioning member (6) is a building viscous damper.

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