CN109056777B - Anti-overturning measure of foundation shock-insulation building and construction method thereof - Google Patents
Anti-overturning measure of foundation shock-insulation building and construction method thereof Download PDFInfo
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- CN109056777B CN109056777B CN201810810365.9A CN201810810365A CN109056777B CN 109056777 B CN109056777 B CN 109056777B CN 201810810365 A CN201810810365 A CN 201810810365A CN 109056777 B CN109056777 B CN 109056777B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/34—Foundations for sinking or earthquake territories
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/08—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against transmission of vibrations or movements in the foundation soil
Abstract
The invention relates to an anti-overturning measure of a foundation shock-insulation building and a construction method thereof, wherein the anti-overturning measure comprises an anti-overturning buttress and an anti-overturning beam; the anti-overturning buttress and the anti-overturning beam are symmetrically arranged along four sides of the shock insulation support, symmetrically arranged on two sides, asymmetrically arranged on a single side and arranged in an L shape on two perpendicular surfaces, the anti-overturning beam is positioned above the shock insulation support, the anti-overturning buttress is arranged below the middle of the overhanging length of the anti-overturning beam, the anti-overturning buttress is formed by pouring concrete and attaching rubber sheets on the upper surface, a square steel tube bottom plate forming the anti-overturning beam and a pre-embedded steel plate of the shock insulation upper buttress are integrally processed, the width of the anti-overturning beam is linearly narrowed along the overhanging length direction, end sealing plates are welded at two ends of the square steel tube, and concrete pouring vibration seams are reserved on the square steel tube top plate. The anti-overturning measure has the advantages of low cost, simple construction and stable and reliable performance, and can effectively solve the overturning problem of the foundation shock-insulation building.
Description
Technical Field
The invention relates to an anti-overturning measure of a foundation shock-insulation building and a construction method thereof, belonging to the technical field of engineering earthquake resistance.
Background
Earthquake is one of natural disasters which threaten human beings in the world, and people actively focus on earthquake prediction and earthquake prevention and disaster reduction research of structural engineering in order to prevent the earthquake from causing great loss of lives and properties to the human beings. Because the cause of the earthquake is complex, people have insufficient knowledge of the earth, and therefore the earthquake prediction cannot be accurately carried out. Therefore, earthquake prevention and disaster reduction of buildings become a research hotspot in the field. The basic shock insulation is different from the common shock insulation theory that the energy absorption caused by the shock strength or the plasticity, namely the hard resistance earthquake motion, is adopted, the basic shock insulation is that a shock insulation support is arranged between an upper structure and a base to form a flexible shock insulation layer, and most of the energy generated by the earthquake is absorbed by the flexible shock insulation layer, so that the earthquake action of the upper structure is reduced, and the earthquake safety is improved.
After years of system research and wide engineering application and multiple major earthquake tests, the seismic isolation technology is developed into a mature shock absorption measure. The working mechanism of basic shock insulation is generally explained as that the aim of shock absorption is achieved by prolonging the natural vibration period of a structure, avoiding the excellent period of an earthquake and avoiding the resonance of the structure, so that the basic shock insulation is mostly used in building structures with less than thirty layers and small height-to-width ratio. Some researches in recent years show that the high-rise building has good shock absorption effect by adopting basic shock absorption, and meanwhile, compared with other existing shock absorption technical means, the basic shock absorption technology is the most approved shock absorption means in the aspects of economy, practicality, stable and reliable performance and the like. However, the flexible seismic isolation layer of the seismic isolation support is poor in tensile property, and when the flexible seismic isolation layer of a high-rise and super-high-rise seismic isolation building with a large height-width ratio is subjected to rare earthquake, the risk of structure overturning and collapsing is large due to large displacement of the seismic isolation layer. Based on the above, the building earthquake-proof design specification (GB 50011-2010) clearly provides the earthquake-proof design requirement that the height-width ratio is preferably less than 4. The limited conditions of seismic isolation specification obviously restrict the application range of the seismic isolation technology, and the problem of overturning and collapsing resistance of the seismic isolation structure becomes the bottleneck of full popularization and application of the mature and reliable seismic isolation technology at present, which also becomes the focus of seismic isolation technology research in recent years. The core of the overturning problem of the shock insulation structure is to solve the problem of insufficient tensile property of the shock insulation support, the idea of arranging a tensile device at the shock insulation support is provided by shock insulation support production enterprises and related research units, and at present, several tensile devices enter the production stage, which has positive significance on the application of the shock insulation technology in high-aspect-ratio and super high-rise buildings, but the tensile devices have generally higher cost and certain construction technical requirements.
Disclosure of Invention
The invention provides an anti-overturning measure and a construction method for a foundation isolation building, aiming at the problem that after a base isolation technology is adopted for a high-rise building and a super high-rise building with a lower tensile property and a larger height-to-width ratio, when rare earthquakes occur, the shock isolation support 4 can overturn and collapse due to the fact that the tensile stress borne by the shock isolation support 4 exceeds the tensile limit.
The technical scheme of the invention is as follows: an anti-overturning measure of a foundation shock-insulation building comprises an anti-overturning buttress 1 and an anti-overturning beam 2; the anti-overturning buttress 1 and the anti-overturning beam 2 are symmetrically arranged along two side surfaces of a shock insulation support 4 below a side column or asymmetrically arranged on a single side surface, symmetrically arranged along four side surfaces of the shock insulation support 4 below a corner column or arranged in an L shape on two vertical surfaces, the anti-overturning beam 2 is positioned above the shock insulation support 4, the anti-overturning buttress 1 is arranged below the middle of the overhanging length of the anti-overturning beam 2, the anti-overturning buttress 1 is formed by pouring concrete and attaching a rubber sheet 3 to the upper surface, a square steel tube bottom plate forming the anti-overturning beam 2 and an embedded steel plate of a shock insulation upper buttress 5 are integrally processed, the width of the anti-overturning beam 2 is linearly narrowed along the overhanging length direction, end seal plates are welded at two ends of the square steel tube, and a concrete pouring vibration seam is reserved on the square steel tube top plate.
The cross section of the anti-overturning buttress 1 is isosceles trapezoid.
The thickness of the rubber sheet 3 is 3mm-6 mm.
The distance value between the top surface of the anti-overturning buttress 1 and the bottom surface of the anti-overturning beam 2 is not less than the compression deformation of the shock insulation support 4 under the action of the design value of the compressive stress; the clear distance between the anti-overturning buttress 1 and the shock insulation lower buttress 7 is not less than 4 times of the total thickness of the glue layer of the shock insulation support 4; the length of the anti-overturning buttress 1 is not less than 8 times of the total thickness of the glue layer of the shock insulation support 4.
The overhanging length of the anti-overturning beam 2 is not less than 8 times of the total thickness of the glue layer of the shock insulation support 4.
The anti-overturning beam 2 is reserved in the overhanging length extension direction and is not less than the sheltering free clearance which is 4 times of the total thickness of the glue layer of the shock insulation support 4.
A construction method for an anti-overturning measure of a foundation shock-insulation building comprises the following steps: after the shock insulation support 4 is installed on the shock insulation lower buttress 7 in place, firstly, the prefabricated combined section steel of the embedded steel plate of the shock insulation upper buttress 5 and the square steel pipe of the anti-overturning beam 2 is installed, and concrete of the anti-overturning beam 2 and the shock insulation upper buttress 5 is poured; then determining the pouring position of the anti-overturning buttress 1 according to the anti-overturning beam condition, supporting by using a buttress template, and pouring concrete of the anti-overturning buttress 1; finally, sticking a rubber sheet 3 with the thickness of 3mm-6mm on the upper surface of the anti-overturning buttress 1 and checking the reserved clearance in the length extension direction of the anti-overturning beam; the anti-overturning buttress 1 is arranged below the middle of the overhanging length of the anti-overturning beam 2, the distance value between the top surface of the anti-overturning buttress 1 and the bottom surface of the anti-overturning beam 2 is not less than the compression deformation of the shock insulation support 4 under the action of the design value of the compressive stress, the clear distance between the anti-overturning buttress 1 and the shock insulation lower buttress 7 is not less than 4 times of the total thickness of the glue layer of the shock insulation support 4, and the length of the anti-overturning buttress 1 is not less than 8 times of the total thickness of the glue layer of the shock insulation support 4.
The invention has the beneficial effects that:
1. the invention provides the anti-overturning measures of the basic shock-insulation building, which avoid the interaction influence of the performance between the shock-insulation support and the anti-overturning measures through functional division, and the anti-overturning measures have clear working mechanism, easy quantification of functional requirements and convenient realization.
2. The anti-overturning measure for the seismic isolation building provided by the invention has the advantages of low cost, simple construction and stable and reliable performance, can effectively solve the overturning problem of the seismic isolation building, and has important significance for increasing the height-width ratio limit value of the seismic isolation building and adopting the seismic isolation technology for super high-rise buildings.
Drawings
FIG. 1 is a schematic view of the anti-overturning means arrangement of the present invention;
FIG. 2 is a front view of an anti-overturning buttress, anti-overturning beam configuration;
FIG. 3 is a top view of an anti-overturning buttress, anti-overturning beam configuration;
the reference numbers in the figures: 1-anti-overturning buttress, 2-anti-overturning beam, 3-rubber sheet, 4-shock insulation support, 5-shock insulation upper buttress, 6-frame beam and 7-shock insulation lower buttress.
Detailed Description
Example 1: as shown in fig. 1-3, an anti-overturning measure for a foundation shock-insulation building comprises an anti-overturning buttress 1 and an anti-overturning beam 2; the anti-overturning buttress 1 and the anti-overturning beam 2 are arranged at a peripheral shock insulation support 4 far away from the center of the structure, the anti-overturning buttress 1 and the anti-overturning beam 2 are symmetrically arranged along two side surfaces of the shock insulation support 4 below a side column and symmetrically arranged along four side surfaces of the shock insulation support 4 below a corner column, the anti-overturning buttress 2 is positioned above the shock insulation support 4, the anti-overturning buttress 1 is arranged below the middle of the overhanging length of the anti-overturning beam 2, the anti-overturning buttress 1 is poured by concrete, a rubber sheet 3 is additionally arranged on the upper surface of the anti-overturning buttress 1, the rubber sheet 3 has a buffering effect, and meanwhile, the rubber sheet 3 can generate a certain deformation after being pressed, so that the anti-overturning beam 2 and the anti-overturning buttress 1 can generate corresponding horizontal displacement after being contacted under the earthquake effect. The bottom plate of the square steel pipe forming the anti-overturning beam 2 and the embedded steel plate of the upper seismic isolation buttress 5 are integrally processed, the width of the anti-overturning beam 2 is linearly narrowed along the overhanging length direction, end sealing plates are welded at two ends of the square steel pipe, and concrete pouring vibration gaps are reserved in the top plate of the square steel pipe.
Further, the cross section of the anti-overturning buttress 1 can be in an isosceles trapezoid shape, and the compression stability is good.
Further, the thickness of the rubber sheet 3 may be set to 3 mm.
Further, the distance between the top surface of the anti-overturning buttress 1 and the bottom surface of the anti-overturning beam 2 can be determined by the vertical calculation deformation of the shock-insulating support under the rarely-encountered earthquake working condition, and the value of the vertical calculation deformation is not less than the compression deformation of the shock-insulating support 4 under the action of the design value of the compressive stress; the clear distance between the anti-overturning buttress 1 and the shock insulation lower buttress 7 is not less than 4 times of the total thickness of the glue layer of the shock insulation support 4, so that the anti-overturning buttress 1 can not influence the horizontal deformation of the shock insulation building before the shear failure of the shock insulation support 4; the length of the anti-overturning buttress 1 is not less than 8 times of the total thickness of the glue layer of the shock insulation support 4, so that the anti-overturning buttress 1 can always provide effective supporting function for the anti-overturning beam 2 before the shear failure of the shock insulation support 4.
Further, the overhanging length of the anti-overturning beam 2 can be set to be not less than 8 times of the total thickness of the glue layer of the shock insulation support 4.
Further, can set up buttress length within range, the length epitaxial direction of encorbelmenting of antidumping roof beam 2 reserves the not 4 doubly nothing of glue film gross thickness that are not less than isolation bearing 4 and shelters from the headroom, guarantees that antidumping roof beam 2 can the free movement when the earthquake action, is unlikely to construct the part with other and collides mutually.
The section sizes of the anti-overturning buttress 1 and the anti-overturning beam 2 are determined by calculating the overturning moment of the upper structure, and aiming at the different height conditions of the shock-insulation upper buttress 5, the anti-overturning beam 2 and the frame beam 6 can be set into two parallel bearing members which are independent from each other or the anti-overturning beam 2 and the frame beam 6 are combined into one bearing member.
A construction method for an anti-overturning measure of a foundation shock-insulation building comprises the following steps: after the shock insulation support 4 is installed in place through the shock insulation lower buttress 7, firstly, the prefabricated combined section steel of the embedded steel plate of the shock insulation upper buttress 5 and the square steel pipe of the anti-overturning beam 2 is installed, and concrete of the anti-overturning beam 2 and the shock insulation upper buttress 5 is poured; then determining the pouring position of the anti-overturning buttress 1 according to the anti-overturning beam condition, supporting by using a buttress template, and pouring concrete of the anti-overturning buttress 1; finally, sticking a rubber sheet 3 with the thickness of 3mm on the upper surface of the anti-overturning buttress 1 and checking the reserved clearance in the length extension direction of the anti-overturning beam; the anti-overturning buttress 1 is arranged below the middle of the overhanging length of the anti-overturning beam 2, the distance value between the top surface of the anti-overturning buttress 1 and the bottom surface of the anti-overturning beam 2 is not less than the compression deformation of the shock insulation support 4 under the action of the design value of the compressive stress, the clear distance between the anti-overturning buttress 1 and the shock insulation lower buttress 7 is not less than 4 times of the total thickness of the glue layer of the shock insulation support 4, and the length of the anti-overturning buttress 1 is not less than 8 times of the total thickness of the glue layer of the shock insulation support 4.
Example 2: as shown in fig. 1 to 3, basically the same as in embodiment 1, except that: the anti-overturning buttress 1 and the anti-overturning beam 2 are symmetrically arranged along two side surfaces of the shock insulation support 4 under the side column, and are arranged along two vertical surfaces L of the shock insulation support 4 under the corner column. The rubber sheet 3 may be set to a thickness of 5 mm.
Example 3: as shown in fig. 1 to 3, basically the same as in embodiment 1, except that: the anti-overturning buttress 1 and the anti-overturning beam 2 are arranged along the single side surface of the shock insulation support 4 under the side column in an asymmetrical mode, and are arranged along the four side surfaces of the shock insulation support 4 under the corner column in a symmetrical mode. The rubber sheet 3 may be set to have a thickness of 4 mm.
Example 4: as shown in fig. 1 to 3, basically the same as in embodiment 1, except that: the anti-overturning buttress 1 and the anti-overturning beam 2 are arranged along the single side surface of the shock insulation support 4 under the side column in an asymmetrical mode, and are arranged along the two vertical surfaces L of the shock insulation support 4 under the corner column in an L-shaped mode. The rubber sheet 3 may be set to have a thickness of 6 mm.
The working principle of the invention is as follows: when the seismic isolation building is in a normal use state and all the seismic isolation supports 4 are pressed, the anti-overturning buttress 1 is not in contact with the anti-overturning beam 2, under the action of rare earthquakes and ultra-rare earthquakes, when the seismic isolation supports 4 are in a tension state or the seismic isolation building has an overturning trend, the anti-overturning buttress 1 arranged along the overturning direction of the seismic isolation building is in contact with the anti-overturning beam 2, the supporting counter force borne by the anti-overturning beam 2 generates an anti-overturning moment on the seismic isolation building, the tensile force borne by the seismic isolation supports 4 is directly balanced, and the seismic isolation building is prevented from overturning and collapsing. And the anti-overturning beam 2 vertical to the direction of the seismic isolation building to be overturned does not contact with the corresponding anti-overturning buttress 1, and cannot influence the seismic isolation building.
While the present invention has been described in detail with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (7)
1. An anti-overturning measure of a foundation shock-insulation building is characterized in that: comprises an anti-overturning buttress (1) and an anti-overturning beam (2); the anti-overturning buttress (1) and the anti-overturning beam (2) are symmetrically arranged or asymmetrically arranged along the two side surfaces of the shock insulation support (4) below the side column or symmetrically arranged along the single side surface, the four side surfaces of the shock insulation support (4) below the corner column are arranged or arranged in an L shape along the two vertical surfaces, the anti-overturning beam (2) is positioned above the shock insulation support (4), the anti-overturning buttress (1) is arranged below the middle of the overhanging length of the anti-overturning beam (2), the anti-overturning buttress (1) is formed by integrally processing a square steel pipe bottom plate forming the anti-overturning beam (2) and an embedded steel plate of the shock insulation upper buttress (5) by adopting concrete pouring and additionally arranging a rubber sheet (3) on the upper surface, the width of the anti-overturning beam (2) is linearly narrowed along the overhanging length direction, end sealing plates are welded at the two ends of the square steel pipe, and a concrete pouring vibration seam is reserved on the square steel; the shock insulation support (4) is arranged on the shock insulation lower buttress (7).
2. The anti-overturning measure of a foundation-isolated building according to claim 1, wherein: the cross section of the anti-overturning buttress (1) is isosceles trapezoid.
3. The anti-overturning measure of a foundation-isolated building according to claim 1, wherein: the thickness of the rubber sheet (3) is 3mm-6 mm.
4. The anti-overturning measure of a foundation-isolated building according to claim 1, wherein: the distance value between the top surface of the anti-overturning buttress (1) and the bottom surface of the anti-overturning beam (2) is not less than the compressive deformation of the shock insulation support (4) under the action of the design value of the compressive stress; the clear distance between the anti-overturning buttress (1) and the shock insulation lower buttress (7) is not less than 4 times of the total thickness of the glue layer of the shock insulation support (4); the length of the anti-overturning buttress (1) is not less than 8 times of the total thickness of the glue layer of the shock insulation support (4).
5. The anti-overturning measure of a foundation-isolated building according to claim 1, wherein: the overhanging length of the anti-overturning beam (2) is not less than 8 times of the total thickness of the glue layer of the shock insulation support (4).
6. The anti-overturning measure of a foundation-isolated building according to claim 1, wherein: the anti-overturning beam (2) is cantilevered and the length in the epitaxial direction is reserved to be not less than 4 times of the total thickness of the glue layer of the shock insulation support (4) without shielding clearance.
7. A construction method for an anti-overturning measure of the foundation-isolated building according to claim 1, wherein: the method comprises the following steps: after the shock insulation support (4) is installed on the shock insulation lower buttress (7) in place, firstly, the prefabricated combined section steel of the embedded steel plate of the shock insulation upper buttress (5) and the square steel pipe of the anti-overturning beam (2) is installed, and concrete of the anti-overturning beam (2) and the shock insulation upper buttress (5) is poured; then determining the pouring position of the anti-overturning buttress (1) according to the anti-overturning beam condition, supporting by using a buttress template, and pouring concrete of the anti-overturning buttress (1); finally, sticking a rubber sheet (3) with the thickness of 3mm-6mm on the upper surface of the anti-overturning buttress (1) and checking a reserved clearance in the length extension direction of the anti-overturning beam; the anti-overturning buttress (1) is arranged below the middle of the overhanging length of the anti-overturning beam (2), the distance value between the top surface of the anti-overturning buttress (1) and the bottom surface of the anti-overturning beam (2) is not less than the compression deformation amount of the shock insulation support (4) under the action of a design value of compressive stress, the clear distance between the anti-overturning buttress (1) and the shock insulation lower buttress (7) is not less than 4 times of the total thickness of the glue layer of the shock insulation support (4), and the length of the anti-overturning buttress (1) is not less than 8 times of the total thickness of the glue layer of the shock insulation support (4).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810810365.9A CN109056777B (en) | 2018-07-23 | 2018-07-23 | Anti-overturning measure of foundation shock-insulation building and construction method thereof |
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| CN201810810365.9A CN109056777B (en) | 2018-07-23 | 2018-07-23 | Anti-overturning measure of foundation shock-insulation building and construction method thereof |
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| CN109056777A CN109056777A (en) | 2018-12-21 |
| CN109056777B true CN109056777B (en) | 2021-01-05 |
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| CN114411974B (en) * | 2022-03-02 | 2023-07-25 | 中国建筑第八工程局有限公司 | Building shock insulation support connecting node and construction method thereof |
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| JP2001090775A (en) * | 1999-09-24 | 2001-04-03 | Mitsubishi Steel Mfg Co Ltd | Friction damper for base isolation |
| CN202170577U (en) * | 2011-06-10 | 2012-03-21 | 广州大学 | Isolated structure of high-rise building |
| CN103526698B (en) * | 2013-11-07 | 2015-06-24 | 天津城建大学 | Cast-in-cantilever construction 0# block concrete supporting system and construction method |
| CN205313989U (en) * | 2015-11-17 | 2016-06-15 | 上海市政工程设计研究总院（集团）有限公司 | Single -column mound bridge antidumping structure |
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