CN106401207B - The overlapping connection structure and its construction method on pillar basis are added for existing building - Google Patents
The overlapping connection structure and its construction method on pillar basis are added for existing building Download PDFInfo
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- CN106401207B CN106401207B CN201610894383.0A CN201610894383A CN106401207B CN 106401207 B CN106401207 B CN 106401207B CN 201610894383 A CN201610894383 A CN 201610894383A CN 106401207 B CN106401207 B CN 106401207B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
Abstract
The invention belongs to building engineering fields, and in particular, to a kind of overlapping connection structure that pillar basis is added for existing building, comprising: existing structure column and existing structure plate, existing structure plate are supported on existing structure column;Wherein: newly-increased basis being set on existing structure column and existing structure plate, newly-increased pillar is set on the basis of increasing newly;Existing structure column, existing structure plate effectively connect reinforcing bar with bottom column by newly-increased column at New-old concrete interface with newly-increased basis and foundation bottom resistant slide reinforcing bar is reliably connected.The present invention is by proposing New-old concrete interface processing requirement, to guarantee that New-old concrete works together;The bearing capacity that structure after being transformed can not only be improved, meets later period useful life longevity requirement and anti-earthquake ductility requirement, also has the advantages that construction cost is lower and construction efficiency is higher.
Description
Technical field
The invention belongs to building engineering fields, and in particular, to a kind of overlapping that pillar basis is added for existing building
Connection structure.
Background technique
According to current urban planning management requirement, orderly implement city repairing and Organic Renewal, Continuity ofhistory text
Arteries and veins will become emphasis.Currently, due to bankroll problem or cannot meet the market requirement and make many cities are more generally existing
At " incomplete or delayed projects " of shut-down, and the transformation of similar engineering and redesign, to vitalize shut-down project, improve that city image has very much must
It wants.Meanwhile in later urbanization process, the Testing and appraisal and strengthening reconstruction of existing building will put on important schedule.
However, in existing strengthening reconstruction technology, useful life longevity, strengthening construction after more generally existing such as reinforcing
In the process because of component dismounting after security risk, reinforcing caused by provisional measure is not in place the problems such as anti-seismic performance reduction.
Summary of the invention
To overcome defect of the existing technology, in conjunction with the existing engineered status in city, the present invention provides a kind of existing
Effective overlapping connection structure that pillar basis is added on building, can not only meet safe and applicable durable requirement, have simultaneously
Standby stronger shock resistance also has the advantages that construction cost is lower and construction efficiency is higher.
To achieve the above object, the invention adopts the following technical scheme:
The overlapping connection structure on pillar basis is added for existing building, comprising: existing structure column and existing structure plate, both
There is structural slab to be supported on existing structure column;Wherein: newly-increased basis being set on existing structure column and existing structure plate, increases basis newly
It is upper that newly-increased pillar is set;Existing structure column, existing structure plate and newly-increased basis are at New-old concrete interface by increasing column newly
Reinforcing bar is effectively connect with bottom column and foundation bottom resistant slide reinforcing bar is reliably connected.
Preferably, when the surface treatment of New-old concrete boundary, respective handling method is taken according to the usage requirement, and meet and set
Count the processing quality requirement proposed;Newly-increased column effectively connect reinforcing bar and foundation bottom resistant slide reinforcing bar with bottom column, can be according to making
With needing to carry out calculating determination;It is described it is newly-increased on the basis of the superstructure pillar that increases newly, need to carry out according to top-out use
Arrangement.
Preferably, it increases newly and bonding pad compound stirrup is set in basis, bonding pad compound stirrup is arranged in newly-increased column and bottom
Column effectively connects reinforcing bar length range, spacing≤100mm and meets styletable stirrup antidetonation security requirements.
Preferably, the horizontal hoop of setting in basis, lateral hoop, longitudinal hoop are increased newly.
Preferably, it increases the vertical muscle of pillar newly and protrudes into newly-increased foundation bottom, increase newly and rectangular closed stirrup is set in basis.
The construction method of the above-mentioned overlapping connection structure that pillar basis is added for existing building, steps are as follows:
(1), New-old concrete boundary surface treatment is carried out between existing structure column, existing structure plate and newly-increased basis, gone
Except original loose concrete, breakage and surface carbonation layer, the rough surface that concave-convex difference is not less than 6mm is formed;
(2), foundation bottom resistant slide reinforcing bar is planted between existing structure plate and newly-increased basis, in existing structure column and newly
Increase between basis, according to stress needs are calculated, plants newly-increased column with bottom column and effectively connect reinforcing bar;
(3), bonding pad compound stirrup is set in newly-increased basis;
(4), according to force analysis is calculated, horizontal hoop, lateral hoop, longitudinal hoop are set in newly-increased basis;It is newly-increased
Pillar indulges muscle and protrudes into newly-increased foundation bottom, and rectangular closed hoop is arranged;
(5), after the completion of work to be tested of knocking off, template installment work is carried out, formwork elevation measuring, position, size should closely conform to set
Meter requires, and support and template are fixed reliable, and formwork edge joint is tight;
(6), casting concrete vibrates, maintenance.
Preferably, New-old concrete boundary surface treatment is carried out using artificial chiseling method or high pressure water jet method.
Compared with prior art, the invention has the following advantages:
1, by proposing New-old concrete interface processing requirement, to guarantee that New-old concrete works together;
2, by the way that foundation bottom resistant slide reinforcing bar is arranged at New-old concrete interface, guarantee effective water of iterative structure
Flat power transmission capacity;
3, it is effectively connect reinforcing bar with bottom column by the way that newly-increased column is arranged at New-old concrete interface, guarantees iterative structure
Anti-bending bearing capacity at interface, and caused eccentric force is misaligned by the upper lower prop net of newly-increased basis equilibrium, it is final to protect
Demonstrate,prove the whole resistance to capsizing of iterative structure;
4, pass through in newly-increased basis and bonding pad compound stirrup is set, the core space shear resistance of Lai Tigao connecting portion,
Increase the anti-earthquake ductility of newly-increased bottom of the pillar, to improve the whole shock resistance of overlapping connection structure;
5, reinforcing bar is effectively connected by being arranged on existing structure column periphery, increases effective calculating section at column bottom, thus
The diameter for reducing connection reinforcing bar, reduces the difficulty of bar planting construction, while can also be carried out according to the deployment scenarios of bottom reinforcement bars
The reasonable selection of bar planting position, and ensure that newly-increased top pillar indulges the positioning of muscle, construction cost is not only reduced, is also improved
Construction efficiency;The bearing capacity that structure after being transformed can not only be improved, meets later period useful life longevity requirement and anti-earthquake ductility is wanted
It asks, also has the advantages that construction cost is lower and construction efficiency is higher.
Detailed description of the invention
Fig. 1 is the floor map that the overlapping connection structure on pillar basis is added for existing building;
Fig. 2 is the diagrammatic cross-section that the overlapping connection structure on pillar basis is added for existing building;
In figure: 1, existing structure column, 2, existing structure plate, 3, newly-increased basis, 4, newly-increased pillar, 5, New-old concrete boundary
Face, 6, newly-increased column with bottom column effectively connect reinforcing bar, 7, foundation bottom resistant slide reinforcing bar, 8, bonding pad compound stirrup, 9, level
Hoop, 10, lateral hoop, 11, longitudinal hoop, 12, the vertical muscle of newly-increased pillar, 13, rectangular closed stirrup.
Specific embodiment
As shown in Figure 1, 2, the overlapping connection structure on pillar basis is added for existing building, comprising: 1 He of existing structure column
Existing structure plate 2, existing structure plate 2 are supported on existing structure column 1;In conjunction with the arrangement and newly-increased bottom of the pillar of newly-increased pillar
Force request, for the validity for guaranteeing structure stress transmitting, the newly-increased basis of setting on existing structure column 1 and existing structure plate 2
3, it increases newly and newly-increased pillar 4 is set on basis 3;Existing structure column 1, existing structure plate 2 and newly-increased basis 3 have a common boundary in New-old concrete
Reinforcing bar 6 is effectively connect with bottom column by newly-increased column at face 5 and foundation bottom resistant slide reinforcing bar 7 is reliably connected;The old and new are mixed
When solidifying soil interface 5 is handled, respective handling method is taken according to the usage requirement, and is met the processing quality that design proposes and wanted
It asks;Newly-increased column effectively connect reinforcing bar 6 and foundation bottom resistant slide reinforcing bar 7 with bottom column, carries out calculating really according to the usage requirement
It is fixed;It is described it is newly-increased on the basis of the superstructure pillar that increases newly, can have biggish according to top-out using needing be arranged
Freedom.
Bonding pad compound stirrup 8 is set in newly-increased basis 3, bonding pad compound stirrup 8, which is arranged in newly-increased column and bottom column, to be had
Effect connection 6 length range of reinforcing bar, spacing≤100mm and meets styletable stirrup antidetonation security requirements, and purpose is to improve connecting portion
Core space shear resistance, increase the anti-earthquake ductility of newly-increased bottom of the pillar, to improve the whole antidetonation energy of overlapping connection structure
Power.
The horizontal hoop 9 of setting, lateral hoop 10, longitudinal hoop 11 in newly-increased basis 3, to improve the antitorque of newly-increased basis 3
Ability.
Newly-increased pillar indulges muscle 12 and protrudes into newly-increased basic 3 bottoms, increases newly and rectangular closed stirrup 13 is arranged in basis 3, with effective
Newly-increased pillar in the fixed newly-increased basis 3 of constraint indulges muscle 12.
The construction method of the above-mentioned overlapping connection structure that pillar basis is added for existing building, steps are as follows:
(1), New-old concrete boundary surface treatment is carried out between existing structure column 1, existing structure plate 2 and newly-increased basis 3,
Artificial chiseling method or high pressure water jet method are such as used, original loose concrete, breakage and surface carbonation layer are removed, forms concave-convex difference not
Rough surface less than 6mm;
(2), foundation bottom resistant slide reinforcing bar 7 is planted between existing structure plate 2 and newly-increased basis 3, is guaranteeing that the old and new are mixed
While solidifying soil works together, the effective level power transmission capacity of iterative structure is improved;In existing structure column 1 and newly-increased basis 3
Between, according to stress needs are calculated, newly-increased column is planted with bottom column and effectively connect reinforcing bar 6, guarantees iterative structure at interface
Anti-bending bearing capacity, and be misaligned caused eccentric force by the balanced upper lower prop nets in newly-increased basis 3, the final iterative structure that guarantees
Whole resistance to capsizing;
(3), bonding pad compound stirrup 8 is set in newly-increased basis, improves the core space shear resistance of connecting portion, increase
The anti-earthquake ductility of newly-increased bottom of the pillar, to improve the whole shock resistance of overlapping connection structure;
(4), according to force analysis is calculated, horizontal hoop 9, lateral hoop 10, longitudinal hoop are set in newly-increased basis 3
11, improve the anti-twisting property on newly-increased basis 3;Newly-increased pillar indulges muscle 12 and protrudes into newly-increased basic 3 bottoms, and rectangular closed hoop is arranged
13, the fixed newly-increased pillar of operative constraint indulges muscle 12;
(5), after the completion of work to be tested of knocking off, template installment work is carried out, formwork elevation measuring, position, size should closely conform to set
Meter requires, and support and template are fixed reliable, and formwork edge joint is tight;
(6), casting concrete answers continuous placing one-pass molding, such as must intermittently, and the intermittent time shortens as far as possible, and under
Upper layer concreting is finished before layer concrete initial set;When vibrating, vibrating head collision slab should be avoided, as template, bracket are sent out
Stop pouring immediately when the shape that changes shifts, and it is intact to rest and reorganize before the concrete coagulation poured.Concreting was finished to end
It should start sprinkling maintenance when solidifying, can specifically be determined according to comprehensive situations such as slump, temperature.
The present invention can increase superstructure newly on existing building according to the needs of use, and can use newly-increased basis balance
The column bottom moment of flexure of newly-increased pillar avoids the destruction in traditional strengthening reconstruction to existing structure to save the setting of ground beam
Process, and many provisional measure for construction safety are eliminated, construction cost is reduced, construction efficiency is improved, enhances and changes
The bearing capacity of rear structure is made, and meets later period useful life longevity requirement and anti-earthquake ductility requirement.
Claims (6)
1. a kind of overlapping connection structure for adding pillar basis for existing building, comprising: existing structure column and existing structure plate,
Existing structure plate is supported on existing structure column;It is characterized by: newly-increased basis is set on existing structure column and existing structure plate,
Newly-increased pillar is set on the basis of newly-increased;Existing structure column, existing structure plate and newly-increased basis lead at New-old concrete interface
Cross that newly-increased column effectively connect reinforcing bar with bottom column and foundation bottom resistant slide reinforcing bar is reliably connected;New-old concrete interface
When processing, respective handling method is taken according to the usage requirement, and meets the processing quality requirement that design proposes;Newly-increased column and bottom
Portion's column effectively connects reinforcing bar and foundation bottom resistant slide reinforcing bar, carries out calculating determination according to the usage requirement;The newly-increased basis
Upper newly-increased superstructure pillar is arranged according to top-out using needs.
2. the overlapping connection structure according to claim 1 for adding pillar basis for existing building, it is characterised in that: new
Increase and bonding pad compound stirrup is set in basis, bonding pad compound stirrup is arranged in newly-increased column and effectively connect reinforcing bar length with bottom column
Range, spacing≤100mm and meets styletable stirrup antidetonation security requirements.
3. the overlapping connection structure according to claim 2 for adding pillar basis for existing building, it is characterised in that: new
Increase the horizontal hoop of setting in basis, lateral hoop, longitudinal hoop.
4. the overlapping connection structure according to claim 3 for adding pillar basis for existing building, it is characterised in that: new
Increase the vertical muscle of pillar and protrude into newly-increased foundation bottom, increases newly and rectangular closed stirrup is set in basis.
5. the construction method of the overlapping connection structure on pillar basis is added described in one of claim 1-4 for existing building,
It is characterized in that, steps are as follows:
(1), New-old concrete boundary surface treatment is carried out between existing structure column, existing structure plate and newly-increased basis, removal is former
There are loose concrete, breakage and surface carbonation layer, forms the rough surface that concave-convex difference is not less than 6mm;
(2), foundation bottom resistant slide reinforcing bar is planted between existing structure plate and newly-increased basis, in existing structure column and newly-increased base
Between plinth, according to stress needs are calculated, newly-increased column is planted with bottom column and effectively connect reinforcing bar;
(3), bonding pad compound stirrup is set in newly-increased basis;
(4), according to force analysis is calculated, horizontal hoop, lateral hoop, longitudinal hoop are set in newly-increased basis;Newly-increased pillar
Vertical muscle protrudes into newly-increased foundation bottom, and rectangular closed hoop is arranged;
(5), after the completion of work to be tested of knocking off, template installment work is carried out, formwork elevation measuring, position, size should closely conform to design and want
It asks, support and template are fixed reliable, and formwork edge joint is tight;
(6), casting concrete vibrates, maintenance.
6. the construction method of the overlapping connection structure on pillar basis, feature are added described in claim 5 for existing building
It is, New-old concrete boundary surface treatment is carried out using artificial chiseling method or high pressure water jet method.
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CN107269016B (en) * | 2017-05-16 | 2019-07-09 | 广东省建筑科学研究院集团股份有限公司 | A kind of node that existing reinforced concrete column is connect with newly-increased reinforced beam |
CN109024712A (en) * | 2018-08-06 | 2018-12-18 | 福建绿城建筑设计有限公司 | Resistance to plucking H profile steel pilework and its construction method are augmented on existing structure sole plate |
CN108678033A (en) * | 2018-08-06 | 2018-10-19 | 浙江绿城建筑设计有限公司 | Resistance to plucking steel tube pile structure and its construction method are augmented on existing structure sole plate |
CN111411791A (en) * | 2020-01-21 | 2020-07-14 | 武大巨成结构股份有限公司 | Existing foundation upper and lower column connecting structure and method for expanding underground space |
CN111456323A (en) * | 2020-04-20 | 2020-07-28 | 上海建工二建集团有限公司 | Structure column of early and later construction structure, basement structure column and construction method of basement structure column |
CN112227751A (en) * | 2020-09-14 | 2021-01-15 | 中国二十冶集团有限公司 | Restoration method of old concrete column |
CN112376935A (en) * | 2020-11-13 | 2021-02-19 | 浙江绿城建筑设计有限公司 | Reinforcing structure of newly-added offset column on existing building and construction method thereof |
CN112593723A (en) * | 2020-11-24 | 2021-04-02 | 浙江二十冶建设有限公司 | Existing building connecting method |
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Effective date of registration: 20230427 Address after: 409-419, Floor 4, Martial Arts Hall Building, 168 Yugu Road, Xihu District, Hangzhou City, Zhejiang Province, 310013 (singular) Patentee after: Jiedi Design Group Co.,Ltd. Address before: No. 168, Xihu District Yu Gu Road, Xihu District, Hangzhou, Zhejiang Patentee before: ZHEJIANG JIEDI ARCHITECTURAL DESIGN Co.,Ltd. |