CN103669425B - The Seismic Isolation of Isolation Layer of bead mortar and bead and fine sand mixture and construction method thereof - Google Patents
The Seismic Isolation of Isolation Layer of bead mortar and bead and fine sand mixture and construction method thereof Download PDFInfo
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Abstract
A kind of Seismic Isolation of Isolation Layer with bead mortar and bead and fine sand mixture and construction method thereof, belong to base isolation building system field.It is specifically related to Seismic Isolation of Isolation Layer and the making of a kind of mortar mixing bead and bead and the fine sand mixture being layed between basis and superstructure.Plain concrete cushion layer is laid and on ground；Embedding steel thimble and limit steel bar in advance in the underbeam of basis, limit steel bar arrives upper foundation beam end face through steel thimble, is anchored by billet and nut；The Seismic Isolation of Isolation Layer with bead and fine sand and mortar is laid between upper and lower foundation beam；Fine sand is filled up in steel thimble.The present invention is applicable to the base isolation of country building, is of great significance for earthquake resistance in rural area mitigation tool.This method easy construction, economical and effective, be conducive in the area popularization and application of vast villages and small towns.
Description
Technical field:
The invention belongs to country building base isolation field, be specifically related to a kind of for a kind of base isolation layer with bead mortar and bead and fine sand mixture between country building basis and superstructure and its construction method thereof.
Background technology:
The principle of base isolation is in that to set up, between basis and superstructure, the supporting member that horizontal rigidity is only small; the natural vibration period making superstructure extends; predominant period away from geological process; thus reducing the geological process impact on superstructure; alleviate earthquake calamity, the safety of life and property of protection people.Although Base Isolation Technology urban skyscraper obtains application, and occur in that various structures form, in all previous earthquake, also play shock absorbing Function of reducing disaster well.But because its cost is high, complicated construction technique, thus be not suitable for promoting in the low rise buildings of vast villages and small towns.And in actual seismic, the damage situations of country building is often the most serious, the threat caused to the safety of life and property of people is also maximum.
Therefore, a kind of economical and practical, cheap, easy construction of research and development, recoverable base isolation form has highly important practice significance and social economic value for quake evaluation after shake.
Summary of the invention:
It is an object of the invention to provide a kind of easy construction, cheap, isolating affection notable and recoverable country building base isolation form and construction method thereof after shake, to solving villages and small towns regional architecture poor seismic behavior, loses serious problem.
For achieving the above object, technical scheme is as follows:
A kind of Seismic Isolation of Isolation Layer with bead mortar and bead and fine sand mixture, including plain concrete cushion layer 1, lower foundation beam 2, mixes the mixed mortar 3 of bead, bead and fine sand mixture 4, upper foundation beam 5, limit steel bar 6, billet 7, fine sand 8, steel thimble 9, nut 10；Plain concrete cushion layer 1 is layed on ground, plain concrete cushion layer 1 has been built lower foundation beam 2, steel thimble 9 and limit steel bar 6 it is embedded with in foundation beam 2, limit steel bar 6 is positioned at pre-buried steel sleeve pipe 9, and build and be anchored in lower foundation beam 2, fine sand 8 is filled in steel thimble 9, the mixed mortar 3 and bead and fine sand mixture 4 of mixing bead is laid at lower foundation beam 2 end face, mix and the mixed mortar 3 of bead and bead and fine sand mixture 4 have built foundation beam 5, it is embedded with steel thimble 9 in upper foundation beam 5, fine sand 8 is filled in steel thimble 9, described limit steel bar 6 through upper foundation beam 5 and on the end face pad of upper foundation beam 5 billet 7 of central aperture nut 10 of screwing on；Described limit steel bar 6 upper end is threaded, and which forms a kind of Seismic Isolation of Isolation Layer with bead mortar and bead and fine sand mixture.
In described plain concrete cushion layer 1, strength grade of concrete is C10, and width is more than foundation width, and thickness is 100mm.
Described upper foundation beam 5 and lower foundation beam 2 are reinforced beam, and strength grade of concrete is C30～C40, and reinforcing bar adopts III grade of steel, and the ratio of reinforcement of beam meets related specifications regulation.
The described mixed mortar 3 mixing bead is mixed together by bead, fine sand, cement, lime paste and water, and its each constituent mass ratio is: cement 9%～13%, sand 13%～15%, bead 55%～60%, lime paste 6%～7.5%, water 4.5%～10%；It is 40～60mm that the described mixed mortar 3 mixing bead lays width along lower foundation beam 2 surrounding, lays together along lower foundation beam 2 length direction every 400～500mm, and width is 40～60mm；Described mixed mortar 3 strength grade mixing bead is not to be exceeded 50% of the masonry mortar strength grade used by upper wall body, in order to plays and relies on himself shear behavior opposing geological process under its little earthquake situations condition, excites the effect of its sliding and shock isolation under big earthquake situations condition.
Described bead diameter is 3.5～5mm；Described fine sand maximum gauge passes through 2.5mm sieve aperture, and grain composition meets relevant art standard；Described lime paste is made a living lime slaking afterproduct, and effective ingredient is Ca (OH)2；Described strength of cement grade is 42.5R, and technical characteristic meets relevant art standard.
Described bead and fine sand mixture 4 are mixed by the fine sand of 2.5mm sieve aperture by diameter 3.5mm～5mm bead and maximum gauge, its mass ratio is bead 55%～60%, fine sand 40%～45%, described bead fine sand mixture 4 should be filled between the mixed mortar 3 mixing bead of laying, it is desirable to full uniformly.
Described limit steel bar 6 diameter is 20～25mm, and lower end is built in lower foundation beam 2, and upper end is threaded, upper foundation beam 5 and lower foundation beam 2 is connected by nut 10 and billet 7；Require that nut 10 can not screw on simultaneously, should make to stay between nut 10 and billet 7 spacing of 50～60mm, to ensure that limit steel bar 6 can freely swing when structure sliding mode, then earthquake energy while limiting structure over-large displacement；6 times end bar hook length of limit steel bar are no less than specification anchorage length and are no less than 5 times of diameters of reinforcing bar.
Described steel thimble 9 diameter is 60～80mm, and in the middle of foundation beam, spacing is 600～800mm.In requirement, relevant position steel thimble 9 centrage of foundation beam 5 and lower foundation beam 2 should be on same vertical curve.
Described fine sand 8 maximum particle diameter should pass through 2.5mm sieve aperture, and fine sand should be filled in steel thimble 9, so that dissipation seismic energy when limit steel bar 6 stirs in fine sand 8.
Above-mentioned a kind of construction method with bead mortar and the Seismic Isolation of Isolation Layer of bead and fine sand mixture, it is characterised in that it comprises the steps:
1) plain concrete cushion layer 1 is laid；
2) after plain concrete cushion layer 1 is hardened, the reinforcing bar of foundation beam 2 under colligation thereon, pre-buried steel sleeve pipe 9, limit steel bar 6, limit steel bar 6 should extend out to foundation beam 5 apical side height place；Build lower foundation beam 2 concrete, and steel thimble 9 in lower foundation beam 2 is filled up fine sand 8；
3) formed after intensity until lower foundation beam 2 concrete hardening, build the mixed mortar 3 mixing bead, mortar bandwidth 40～60mm, longitudinal pitch 400～500mm by laying bricks or stones；Mortar forms after intensity filling glass pearl and fine sand mixture 4 in mortar band；
4) mix after the mixed mortar 3 of bead is sufficiently hardened foundation beam 5 reinforcing bar, pre-buried steel sleeve pipe 9 in colligation thereon, make steel thimble (9) center alignment in lower foundation beam 2 and upper foundation beam 5, be in same perpendicular；Casting concrete, after concrete hardening, fills up fine sand 8 by steel thimble 9；
5) billet 7 on pad, installs reinforcing bar nut 10, must not screw on nut 10, makes nut 10 and billet 7 end face leave the spacing of 50～60mm, to ensure that limit steel bar 6 can Free Transform, simultaneously limiting structure generation over-large displacement in big shake effect.
6) house is built at upper foundation beam 5 end face.
The present invention can obtain following benefit fruit:
1) Seismic Isolation of Isolation Layer with bead mortar and bead and fine sand mixture between upper and lower foundation beam can rely on screed self shear behavior to make Seismic Isolation of Isolation Layer to destroy under little shake and wind action；
2) in, shake is with under big shake effect, and mortar Seismic Isolation of Isolation Layer is cut up by horizontal earthquake action, starts the rolling shock insulation effect with bead mortar and bead and fine sand mixture Seismic Isolation of Isolation Layer and reduction of spondylolisthesis function；Simultaneously; reciprocal in limit steel bar fine sand in steel thimble stir and dilatation also dissipates seismic energy, define a kind of multiple tracks power consumption defence line, consume the geological process being transferred to structure; reach the purpose of protection upper body structure, thus protecting the safety of life and property of people；
3) economical and effective of the present invention, easy construction, and be prone to after shake repair, it is adapted at the area popularization and application of vast villages and small towns.
Accompanying drawing illustrates:
Fig. 1 is upper foundation beam end face Seismic Isolation of Isolation Layer paving mode and limit steel bar hole layout drawing；
Fig. 2 is I-I profile；
In figure: 1-plain concrete cushion layer；Foundation beam under 2-；3-mixes the mixed mortar of bead；4-bead and fine sand mixture；The upper foundation beam of 5-；6-limit steel bar；7-billet；8-fine sand；9-steel thimble；10-nut.
Detailed description of the invention:
For being more fully understood that the present invention, it is further elucidated with present invention below in conjunction with accompanying drawing 1 and accompanying drawing 2.
Such as Fig. 1 and Fig. 2, a kind of Seismic Isolation of Isolation Layer with bead mortar and bead and fine sand mixture, including plain concrete cushion layer 1, lower foundation beam 2, mixes the mixed mortar 3 of bead, bead and fine sand mixture 4, upper foundation beam 5, limit steel bar 6, billet 7, fine sand 8, steel thimble 9, nut 10；Plain concrete cushion layer 1 is layed on ground, plain concrete cushion layer 1 has been built lower foundation beam 2, steel thimble 9 and limit steel bar 6 it is embedded with in foundation beam 2, limit steel bar 6 is positioned at pre-buried steel sleeve pipe 9, and build and be anchored in lower foundation beam 2, fine sand 8 is filled in steel thimble 9, the mixed mortar 3 and bead and fine sand mixture 4 of mixing bead is laid at lower foundation beam 2 end face, mix and the mixed mortar 3 of bead and bead and fine sand mixture 4 have built foundation beam 5, it is embedded with steel thimble 9 in upper foundation beam 5, fine sand 8 is filled in steel thimble 9, by the billet 7 of screwed for upper end limit steel bar 6 central aperture on upper foundation beam 5 end face pad nut 10 of screwing on.Which forms a kind of Seismic Isolation of Isolation Layer with bead mortar and bead and fine sand mixture.
In described plain concrete cushion layer 1, strength grade of concrete is C10, and width is more than foundation width, and thickness is 100mm.
Described upper foundation beam 5 and lower foundation beam 2 are reinforced beam, and strength grade of concrete is C35, and vertical concrete steel muscle adopts III grade of steel, and diameter is taken as 20mm.
The described mixed mortar 3 mixing bead is mixed together by bead, fine sand, cement, lime paste and water, and its each constituent mass ratio is: cement 9.2%, sand 13.5%, bead 58.2%, lime paste 6.8%, water 12.3%；The described mixed mortar 3 mixing bead is laid width along lower foundation beam 2 surrounding and be should be 50mm, lays together along lower foundation beam 2 length direction every 500mm, and width is 50mm.Described mixed mortar 3 strength grade mixing bead is not to be exceeded 50% of the masonry mortar strength grade used by upper wall body, in order to plays and relies on himself shear behavior opposing geological process under its little earthquake situations condition, excites the effect of its sliding and shock isolation under big earthquake situations condition.
Described bead diameter is 3.5～5mm；Described fine sand maximum gauge passes through 2.5mm sieve aperture, and grain composition meets relevant art standard；Described lime paste is made a living lime slaking afterproduct, and effective ingredient is Ca (OH)2；Described strength of cement grade is 42.5R, and technical characteristic meets relevant art standard.
Described bead and fine sand mixture 4 are mixed by the fine sand of 2.5mm sieve aperture by diameter 3.5mm～5mm bead and maximum gauge, its mass ratio is bead 60%, fine sand 40%, described bead fine sand mixture 4 should be filled between the mixed mortar 3 mixing bead of laying, it is desirable to full uniformly.
Described limit steel bar (6) diameter is 22mm, and lower end is built in lower foundation beam 2, and upper end is threaded, upper foundation beam 5 and lower foundation beam 2 is connected by nut 10 and billet 7；Require that nut 10 can not screw on simultaneously, should make to stay between nut 10 and billet 7 spacing of 50mm, to ensure that limit steel bar 6 can freely swing when structure sliding mode, then earthquake energy while limiting structure over-large displacement；Under limit steel bar (6), end bar hook length is no less than specification anchorage length and is no less than 5 times of diameters of reinforcing bar.
Described steel thimble 9 diameter is 80mm, and in the middle of foundation beam, spacing is 800mm.In requirement, relevant position steel thimble 9 centrage in foundation beam 5 and lower foundation beam 2 should be on same vertical curve.
Described fine sand 8 maximum particle diameter should pass through 2.5mm sieve aperture, and fine sand should be filled in steel thimble 9, so that dissipation seismic energy when limit steel bar 6 stirs in fine sand 8.
The construction method of above-mentioned a kind of base isolation layer with bead mortar and bead and fine sand mixture, it is characterised in that it comprises the steps:
1) plain concrete cushion layer 1 is laid；
2), after band plain concrete cushion layer 1 hardening, the reinforcing bar of foundation beam 2 under colligation in plain concrete cushion layer 1, pre-buried steel sleeve pipe 9, limit steel bar 6, limit steel bar should extend out to foundation beam 5 apical side height place；Build lower foundation beam 2 concrete, and steel thimble in lower foundation beam 2 is filled up fine sand 8；
3) formed after intensity until lower foundation beam 2 concrete hardening, build the mixed mortar 3 mixing bead, mortar bandwidth 40～60mm, longitudinal pitch 400～500mm by laying bricks or stones；Mortar forms after intensity filling glass pearl and fine sand mixture 4 in mortar band；
4) mix after the mixed mortar 3 of bead is sufficiently hardened foundation beam 5 reinforcing bar, pre-buried steel sleeve pipe (9) in colligation thereon, make steel thimble (9) center alignment in lower foundation beam 2 and upper foundation beam 5, be in same perpendicular；Casting concrete, after concrete hardening, fills up fine sand 8 by steel thimble 9；
5) billet 7 on pad, installs reinforcing bar nut 10, must not screw on nut 10, makes nut 10 and billet 7 end face leave the spacing of 50mm, to ensure that limit steel bar 6 can Free Transform, simultaneously limiting structure generation over-large displacement in big shake effect.
6) house is built at upper foundation beam 5 end face.
It is above an exemplary embodiments of the present invention, but the enforcement of the present invention is not limited to this.Each raw material and the value up and down of each raw material, interval value cited by the present invention all can realize the present invention, numerous to list herein.
Claims (9)
1. the construction method with bead mortar and the Seismic Isolation of Isolation Layer of bead and fine sand mixture, it is characterised in that it comprises the steps:
1) plain concrete cushion layer (1) is laid；
2) after plain concrete cushion layer (1) is hardened, the pre-buried steel thimble of the reinforcing bar (9) of foundation beam (2), limit steel bar (6) under colligation thereon, limit steel bar (6) should extend out to foundation beam (5) apical side height place；Build lower foundation beam (2) concrete, and lower foundation beam (2) interior steel thimble (9) is filled up fine sand (8)；
3) formed after intensity until lower foundation beam (2) concrete hardening, build the mixed mortar (3) mixing bead, mortar bandwidth 40～60mm, longitudinal pitch 400～500mm by laying bricks or stones；Mortar forms after intensity filling glass pearl and fine sand mixture (4) in mortar band；
4) foundation beam (5) reinforcing bar in colligation thereon is mixed after the mixed mortar (3) of bead is sufficiently hardened, pre-buried steel sleeve pipe (9), make steel thimble (9) center alignment in lower foundation beam (2) and upper foundation beam (5), be in same perpendicular；Casting concrete, after concrete hardening, fills up fine sand (8) by steel thimble (9)；
5) billet (7) on pad, nut (10) is installed, must not screw on nut (10), nut (10) and billet end face is made to leave the spacing of 50～60mm, to ensure that limit steel bar (6) can Free Transform, simultaneously limiting structure generation over-large displacement in big shake effect；
6) house is built at upper foundation beam (5) end face.
2. a kind of construction method with bead mortar and the Seismic Isolation of Isolation Layer of bead and fine sand mixture according to claim 1, it is characterized in that: a kind of Seismic Isolation of Isolation Layer with bead mortar and bead and fine sand mixture, including plain concrete cushion layer (1), lower foundation beam (2), mix the mixed mortar (3) of bead, bead and fine sand mixture (4), upper foundation beam (5), limit steel bar (6), billet (7), fine sand (8), steel thimble (9), nut (10)；Plain concrete cushion layer (1) is layed on ground, plain concrete cushion layer (1) has been built lower foundation beam (2), steel thimble (9) and limit steel bar (6) it is embedded with in lower foundation beam (2), limit steel bar (6) is positioned at pre-buried steel sleeve pipe (9), and build and be anchored in lower foundation beam (2), fine sand (8) is filled in steel thimble (9), the mixed mortar (3) and bead and fine sand mixture (4) of mixing bead is laid at lower foundation beam (2) end face, mix and the mixed mortar (3) of bead and bead and fine sand mixture (4) have built foundation beam (5), steel thimble (9) it is embedded with in upper foundation beam (5), fine sand (8) is filled in steel thimble (9), in described limit steel bar (6) traverse foundation beam (5) and on the end face pad of upper foundation beam (5) billet (7) of central aperture nut of screwing on (10)；Described limit steel bar (6) upper end is threaded, and which forms a kind of Seismic Isolation of Isolation Layer with bead mortar and bead and fine sand mixture.
3. a kind of construction method with bead mortar and the Seismic Isolation of Isolation Layer of bead and fine sand mixture according to claim 1, it is characterized in that: in described plain concrete cushion layer (1), strength grade of concrete is C10, width is more than foundation width, and thickness is 100mm.
4. a kind of construction method with bead mortar and the Seismic Isolation of Isolation Layer of bead and fine sand mixture according to claim 1, it is characterized in that: described upper foundation beam (5) and lower foundation beam (2) are reinforced beam, strength grade of concrete is C30～C40, reinforcing bar adopts III grade of steel, and the ratio of reinforcement of beam meets related specifications regulation.
5. a kind of construction method with bead mortar and the Seismic Isolation of Isolation Layer of bead and fine sand mixture according to claim 1, it is characterized in that: described in mix the mixed mortar (3) of bead and mixed together by bead, fine sand, cement, lime paste and water, its each constituent mass ratio is: cement 9%～13%, sand 13%～15%, bead 55%～60%, lime paste 6%～7.5%, water 4.5%～10%；It is 40～60mm that the described mixed mortar (3) mixing bead lays width along lower foundation beam (2) surrounding, lays together along lower foundation beam (2) length direction every 400～500mm, and width is 40～60mm；Described mixed mortar (3) strength grade mixing bead is not to be exceeded 50% of the masonry mortar strength grade used by upper wall body, rely on himself shear behavior opposing geological process under its little earthquake situations condition to play, under big earthquake situations condition, excite the effect of its sliding and shock isolation；
Described bead diameter is 3.5～5mm；Described fine sand maximum gauge passes through 2.5mm sieve aperture, and grain composition meets relevant art standard；Described lime paste is made a living lime slaking afterproduct, and effective ingredient is Ca (OH)2；Described strength of cement grade is 42.5R, and technical characteristic meets relevant art standard.
6. a kind of construction method with bead mortar and the Seismic Isolation of Isolation Layer of bead and fine sand mixture according to claim 1, it is characterized in that: described bead and fine sand mixture (4) are mixed by the fine sand of 2.5mm sieve aperture by diameter 3.5mm～5mm bead and maximum gauge, its mass ratio is bead 55%～60%, fine sand 40%～45%, described bead and fine sand mixture (4) should be filled between the mixed mortar (3) mixing bead of laying, it is desirable to full uniformly.
7. a kind of construction method with bead mortar and the Seismic Isolation of Isolation Layer of bead and fine sand mixture according to claim 1, it is characterized in that: described limit steel bar (6) diameter is 20～25mm, lower end is built in lower foundation beam (2), upper end is threaded, upper foundation beam (5) and lower foundation beam (2) is connected by nut (10) and billet (7)；Require that nut (10) can not screw on simultaneously, should make to stay between nut (10) and billet (7) spacing of 50～60mm, to ensure that limit steel bar (6) can freely swing when structure sliding mode, then earthquake energy while limiting structure over-large displacement；Under limit steel bar (6), end bar hook length is no less than specification anchorage length and is no less than 5 times of diameters of reinforcing bar.
8. a kind of construction method with bead mortar and the Seismic Isolation of Isolation Layer of bead and fine sand mixture according to claim 1, it is characterised in that: described steel thimble (9) diameter is 60～80mm, is placed in the middle of foundation beam, and spacing is 600～800mm；In requirement, relevant position steel thimble (9) centrage of foundation beam (5) and lower foundation beam (2) should be on same vertical curve.
9. a kind of construction method with bead mortar and the Seismic Isolation of Isolation Layer of bead and fine sand mixture according to claim 1, it is characterized in that: described fine sand (8) maximum particle diameter should pass through 2.5mm sieve aperture, fine sand should be filled in steel thimble (9), so that dissipation seismic energy when limit steel bar (6) stirs in fine sand (8).
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| CN201310732552.7A CN103669425B (en) | 2013-12-26 | 2013-12-26 | The Seismic Isolation of Isolation Layer of bead mortar and bead and fine sand mixture and construction method thereof |
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| CN104594392B (en) * | 2015-01-06 | 2016-05-18 | 北京工业大学 | Self-adding formula bead-graphite sliding base isolated system and the practice |
| CN110777833A (en) * | 2019-10-24 | 2020-02-11 | 黑龙江省地震办公室 | Shock isolation method and shock isolation system |
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| CN102518230A (en) * | 2011-12-26 | 2012-06-27 | 北京工业大学 | Earthquake isolating house with glass bead-fine sand-cementing material compound layer and building method for earthquake isolating house |
| CN102518231A (en) * | 2011-12-26 | 2012-06-27 | 北京工业大学 | Base isolation house of antirust sheet groove built-in glass balls and fine sand and method thereof |
| KR20130012300A (en) * | 2011-07-25 | 2013-02-04 | (주)세라켐 | Photoluminescent high-toughness mortar with earthquake resistance and construction method using the same |
| CN103306494A (en) * | 2013-05-31 | 2013-09-18 | 叶香竹 | Structure processing method for steel structure storey-addition building |
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Patent Citations (4)
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|---|---|---|---|---|
| KR20130012300A (en) * | 2011-07-25 | 2013-02-04 | (주)세라켐 | Photoluminescent high-toughness mortar with earthquake resistance and construction method using the same |
| CN102518230A (en) * | 2011-12-26 | 2012-06-27 | 北京工业大学 | Earthquake isolating house with glass bead-fine sand-cementing material compound layer and building method for earthquake isolating house |
| CN102518231A (en) * | 2011-12-26 | 2012-06-27 | 北京工业大学 | Base isolation house of antirust sheet groove built-in glass balls and fine sand and method thereof |
| CN103306494A (en) * | 2013-05-31 | 2013-09-18 | 叶香竹 | Structure processing method for steel structure storey-addition building |
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