CN112376935A - Reinforcing structure of newly-added offset column on existing building and construction method thereof - Google Patents
Reinforcing structure of newly-added offset column on existing building and construction method thereof Download PDFInfo
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- CN112376935A CN112376935A CN202011266752.4A CN202011266752A CN112376935A CN 112376935 A CN112376935 A CN 112376935A CN 202011266752 A CN202011266752 A CN 202011266752A CN 112376935 A CN112376935 A CN 112376935A
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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
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
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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
- E04G23/0266—Enlarging
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Abstract
The invention belongs to the field of building engineering, and particularly relates to a reinforcing structure of a newly added offset column on an existing building and a construction method thereof. The invention can fully utilize the characteristic that the existing structure has certain bearing capacity, does not need temporary construction safety support measures, not only reduces the construction cost, but also improves the construction efficiency; the damage to the existing structure is less, and the normal use function of the existing building is not required to be interrupted; the improved structure has obvious effect of improving the bearing capacity, can meet the requirements of safe use, durability and earthquake resistance and ductility, and has wide application range.
Description
Technical Field
The invention belongs to the field of constructional engineering, and particularly relates to a reinforced structure for a newly added offset column on an existing building and a construction method thereof.
Background
With the rapid development of urban construction, the detection, identification, reinforcement and modification of the existing buildings have already advanced an important schedule. According to the current urban planning management work requirement, urban repair and organic update are orderly implemented, and historical context is continued to become a key point.
During existing structural transformation, often run into the vertical member of reservation and can not satisfy building operation requirement, and need change the position of vertical member, make newly-increased post very common with the phenomenon of existing structure post off normal, if adopt traditional technical treatment then need carry out foundation construction again or plant the muscle on existing structure, caused and removed the destruction to the chisel of existing structure certain area, the construction degree of difficulty is big, the cost is higher, and effective connection and the combined action of newly-increased vertical member and existing structure can not be guaranteed, influence the quality safety of building.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a reinforced structure of a newly added offset column on the existing building and a construction method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
existing building adds reinforced structure of off normal post newly includes: the existing building structure column and the existing building structure plate are supported on the existing building structure column; the existing building structure post and the existing building structure plate are provided with a plate top newly-added superposed connection foundation and a plate bottom newly-added superposed post cap, the newly-added offset post on the existing building is arranged on the plate top newly-added superposed connection foundation, and a superposed connection structure is formed between the existing building structure post and the newly-added offset post.
Preferably, according to the stress calculation requirement, a plate top newly added superposed connection foundation top rib, a plate bottom newly added superposed column cap bottom rib, newly added vertical tensile steel bars and newly added horizontal distribution steel bars are arranged in the plate top newly added superposed connection foundation and the plate bottom newly added superposed column cap, and the reserved column longitudinal steel bars are embedded into the plate top newly added superposed connection foundation to meet the effective anchoring requirement;
preferably, newly added offset column longitudinal ribs are arranged in newly added offset columns on the existing building, the newly added offset columns need to extend into the bottom of the newly added superposed connection foundation on the plate top to meet the bending requirement, and rectangular closed stirrups at the bottoms of the newly added offset columns are arranged for effective constraint and fixation;
preferably, when the new and old concrete interfaces are treated, corresponding treatment methods can be adopted according to use requirements, the treatment quality requirements proposed by design are met, and horizontal shear steel bars of the new and old concrete interfaces are set;
the construction method of the reinforced structure of the newly added offset column on the existing building comprises the following steps:
(1) processing the interface of new and old concrete by adopting a manual chiseling method or a high-pressure water jetting method among the existing building structure columns, the existing building structure plates, the plate top added superposed connection foundation and the plate bottom added superposed column caps, and removing the loose, damaged and surface carbonized layer of the original concrete to form a rough surface with the concave-convex difference not less than 6 mm;
(2) the new and old concrete interface horizontal shear steel bars are arranged among the existing building structure columns, the existing building structure plates, the plate top newly-added superposed connection foundations and the plate bottom newly-added superposed column caps, so that the effective horizontal force transfer capability and the integral bending resistance bearing capability of the superposed connection structure are improved while the common work of the new and old concrete is ensured;
(3) in order to balance and convert the bending moment caused by the deviation of the newly-added deviation pillar on the existing building, newly-added superposed column cap bottom ribs, newly-added vertical tensile reinforcements, newly-added horizontal distribution reinforcements and newly-added superposed connection foundation top ribs on the top of the plate are arranged in the superposed connection structure according to calculation stress analysis, wherein the newly-added vertical tensile reinforcements need to penetrate through the existing building structure plate, the newly-added superposed column cap bottom ribs on the bottom of the plate in the existing building structure pillar area need to be implanted into the existing building structure pillar, and the implanted rib depth needs to meet the requirements of specification and calculation stress;
(4) in order to ensure the internal force transmission between the newly added offset column on the existing building and the existing building structure column, the longitudinal bar of the existing building structure column is embedded into the newly added superposed connection foundation on the plate top to meet the effective anchoring requirement, the longitudinal bar of the newly added offset column extends into the bottom of the newly added superposed connection foundation on the plate top, and a rectangular closed stirrup at the bottom of the newly added offset column is arranged for effective constraint and fixation;
(5) after the binding and acceptance work of the steel bars is finished, the template installation work is carried out, the elevation, the position and the size of the template accurately meet the design requirements, the support and the template are reliably fixed, and the splicing seam of the template is tight;
(6) pouring concrete, vibrating and curing.
Compared with the prior art, the invention has the following beneficial effects:
1. by arranging the newly-added superposed connection foundation at the top of the plate and the newly-added superposed column cap at the bottom of the plate, a superposed connection structure is formed between the existing building structure column and the newly-added offset column, so that internal force is effectively transmitted, and the safety and reliability of the whole structure are ensured;
2. the existing structure is not required to be dismantled, the damage to the existing structure is less, and the normal function use of the existing building is not required to be interrupted;
3. the characteristic that the existing structure has certain bearing capacity is fully utilized, and temporary construction safety support measures are not needed, so that the construction cost is reduced, and the construction efficiency is improved;
4. through design and computational analysis, allow to arrange vertical atress component according to newly-increased service function needs on existing building, provide certain space and degree of freedom for the building design.
Drawings
FIG. 1 is a schematic plan view of a reinforcement structure for newly added offset columns in an existing building;
FIG. 2 is a schematic cross-sectional view taken along line A-A of a reinforcement structure for an existing building with offset pillars;
FIG. 3 is a schematic cross-sectional view B-B of a reinforcement structure for newly added offset columns of an existing building;
in the figure: 1. the existing building structure post, 2, existing building structure board, 3, newly-increased off normal post on the existing building, 4, the newly-increased coincide connection basis in board top, 5, newly-increased coincide post cap at the bottom of the board, 6, newly-increased coincide post cap bottom muscle at the bottom of the board, 7, newly-increased vertical tensile steel bar, 8, newly-increased horizontal distribution reinforcing bar, 9, newly-increased coincide connection basis top muscle in board top, 10, old concrete interface, 11, newly-increased off normal post indulges the muscle, 12, newly-increased off normal post bottom rectangle closed hoop muscle, 13, old concrete interface level shear reinforcement, 14, reserve post and indulge the muscle.
Detailed Description
As shown in fig. 1, 2 and 3, the reinforcement structure for the newly added offset pillar in the existing building includes: the existing building structure column 1 and the existing building structure plate 2, wherein the existing building structure plate 2 is supported on the existing building structure column 1; arranging a plate top newly-added superposed connection foundation 4 and a plate bottom newly-added superposed column cap 5 on the existing building structure column 1 and the existing building structure plate 2; the offset column 3 newly added on the existing building is arranged on the newly added superposed connection foundation 4 on the plate top.
A plate bottom newly-added superposed column cap bottom rib 6, a newly-added vertical tensile steel bar 7, a newly-added horizontal distribution steel bar 8 and a plate top newly-added superposed connection foundation top rib 9 are arranged in the plate top newly-added superposed connection foundation 4 and the plate bottom newly-added superposed column cap 5; the reserved column longitudinal ribs 14 are embedded into the plate top, and the superposition connection foundation 4 is newly added to meet the effective anchoring requirement.
Newly-increased off normal post indulges muscle 11 in 3 on the existing building newly-increased off normal post, need stretch into the board top newly-increased coincide and connect 4 bottoms of basis and satisfy the requirement of buckling to set up newly-increased off normal post bottom rectangle closed stirrup 12 and carry out effective restraint fixed.
By combining the arrangement of newly added offset columns 3 on the existing building and the stress requirement of the bottom, when the new and old concrete interfaces 10 are processed, corresponding processing methods can be adopted according to the use requirements, the processing quality requirement proposed by the design is met, and the horizontal shear steel bars 13 of the new and old concrete interfaces are arranged.
The construction method of the reinforced structure of the newly added offset column on the existing building comprises the following steps:
(1) processing a new and old concrete interface 10 among the existing building structure column 1, the existing building structure plate 2, the newly-added superposed connection foundation 4 on the plate top and the newly-added superposed column cap 5 on the plate bottom by adopting a manual chiseling method or a high-pressure water jetting method, removing the loose, damaged and surface carbonized layer of the original concrete, and forming a rough surface with the concave-convex difference not less than 6 mm;
(2) setting horizontal shear steel bars 13 of new and old concrete interfaces among the existing building structure columns 1, the existing building structure plates 2, the newly-added superposed connection foundations 4 on the plate tops and the newly-added superposed column caps 5 on the plate bottoms according to the calculation stress requirements, and improving the effective horizontal force transfer capacity and the integral bending resistance bearing capacity of the superposed connection structure while ensuring the common work of the new and old concrete;
(3) in order to balance and convert the bending moment caused by the deviation of a newly added deviation pillar 3 on an existing building, according to calculation stress analysis, a newly added plate bottom superposed pillar cap bottom rib 6, a newly added vertical tensile reinforcement 7, a newly added horizontal distribution reinforcement 8 and a newly added plate top superposed connection foundation top rib 9 are arranged in a superposed connection structure, wherein the newly added vertical tensile reinforcement 7 needs to penetrate through an existing building structure plate 2, the newly added plate bottom superposed pillar cap bottom rib 6 in the area of the existing building structure pillar 1 needs to be implanted into the existing building structure pillar 1, and the embedded rib depth needs to meet the requirements of specification and calculation stress;
(4) in order to ensure the internal force transmission between the newly added offset column 3 on the existing building and the existing building structure column 1, the longitudinal bar of the existing building structure column 1 is embedded into the newly added superposed connection foundation 4 on the plate top to meet the effective anchoring requirement, the newly added offset column longitudinal bar 11 extends into the bottom of the newly added superposed connection foundation 4 on the plate top, and the rectangular closed stirrup 12 at the bottom of the newly added offset column is arranged for effective constraint and fixation;
(5) after the binding and acceptance work of the steel bars is finished, the template installation work is carried out, the elevation, the position and the size of the template accurately meet the design requirements, the support and the template are reliably fixed, and the splicing seam of the template is tight;
(6) pouring concrete, namely continuously pouring and forming at one time, if the concrete is required to be intermittent, shortening the intermittent time as much as possible, and pouring the upper layer of concrete before the initial setting of the lower layer of concrete; during vibration, the vibrating rod is prevented from colliding the template, pouring is stopped immediately if the template and the support deform and shift, and the poured concrete is well laid before being solidified. And (3) after the concrete is poured and finally set, starting watering and curing, and specifically comprehensively determining according to the concrete slump, air temperature and other conditions.
The method is adopted to reinforce and reform the existing building, the characteristic that the existing structure has certain bearing capacity can be fully utilized, temporary construction safety support measures are not needed, the construction cost is reduced, and the construction efficiency is improved; the damage to the existing structure is less, and the normal use function of the existing building is not required to be interrupted; the improved structure has obvious effect of improving the bearing capacity, can meet the requirements of safe use, durability and earthquake resistance and ductility, and has wide application range.
Claims (5)
1. A reinforced structure of newly added offset columns on existing buildings, comprising: the existing building structure column and the existing building structure plate are supported on the existing building structure column; the method is characterized in that: the existing building structure post and the existing building structure plate are provided with a plate top newly-added superposed connection foundation and a plate bottom newly-added superposed post cap, the newly-added offset post on the existing building is arranged on the plate top newly-added superposed connection foundation, and a superposed connection structure is formed between the existing building structure post and the newly-added offset post.
2. The reinforcement structure of an existing architecturally newly added offset column according to claim 1, wherein: according to the stress calculation requirement, a top rib of the plate top newly-added superposed connection foundation, a bottom rib of the plate bottom newly-added superposed column cap, newly-added vertical tensile steel bars and newly-added horizontal distribution steel bars are arranged in the plate top newly-added superposed connection foundation and the plate bottom newly-added superposed column cap, and the reserved column longitudinal steel bars are embedded into the plate top newly-added superposed connection foundation to meet the effective anchoring requirement.
3. The reinforcement structure of the newly added offset pillar on the existing building according to claims 1-2, characterized in that: newly-increased off normal post indulges the muscle in newly-increased off normal post on existing building, need stretch into the board top newly-increased coincide and connect the basis bottom and satisfy the requirement of buckling to set up newly-increased off normal post bottom rectangle closed stirrup and carry out effective restraint fixedly.
4. A reinforcement structure for newly added offset columns in an existing building according to claims 1 to 3, wherein: when the new and old concrete interfaces are treated, corresponding treatment methods can be adopted according to use requirements, the treatment quality requirements proposed by design are met, and horizontal shear steel bars of the new and old concrete interfaces are set.
5. The method for constructing a reinforcing structure of a newly added offset column in an existing building as set forth in any one of claims 1 to 4, comprising the steps of:
(1) processing the interface of new and old concrete by adopting a manual chiseling method or a high-pressure water jetting method among the existing building structure columns, the existing building structure plates, the plate top added superposed connection foundation and the plate bottom added superposed column caps, and removing the loose, damaged and surface carbonized layer of the original concrete to form a rough surface with the concave-convex difference not less than 6 mm;
(2) the new and old concrete interface horizontal shear steel bars are arranged among the existing building structure columns, the existing building structure plates, the plate top newly-added superposed connection foundations and the plate bottom newly-added superposed column caps, so that the effective horizontal force transfer capability and the integral bending resistance bearing capability of the superposed connection structure are improved while the common work of the new and old concrete is ensured;
(3) in order to balance and convert the bending moment caused by the deviation of the newly-added deviation pillar on the existing building, newly-added superposed column cap bottom ribs, newly-added vertical tensile reinforcements, newly-added horizontal distribution reinforcements and newly-added superposed connection foundation top ribs on the top of the plate are arranged in the superposed connection structure according to calculation stress analysis, wherein the newly-added vertical tensile reinforcements need to penetrate through the existing building structure plate, the newly-added superposed column cap bottom ribs on the bottom of the plate in the existing building structure pillar area need to be implanted into the existing building structure pillar, and the implanted rib depth needs to meet the requirements of specification and calculation stress;
(4) in order to ensure the internal force transmission between the newly added offset column on the existing building and the existing building structure column, the longitudinal bar of the existing building structure column is embedded into the newly added superposed connection foundation on the plate top to meet the effective anchoring requirement, the longitudinal bar of the newly added offset column extends into the bottom of the newly added superposed connection foundation on the plate top, and a rectangular closed stirrup at the bottom of the newly added offset column is arranged for effective constraint and fixation;
(5) after the binding and acceptance work of the steel bars is finished, the template installation work is carried out, the elevation, the position and the size of the template accurately meet the design requirements, the support and the template are reliably fixed, and the splicing seam of the template is tight;
(6) pouring concrete, vibrating and curing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011266752.4A CN112376935A (en) | 2020-11-13 | 2020-11-13 | Reinforcing structure of newly-added offset column on existing building and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011266752.4A CN112376935A (en) | 2020-11-13 | 2020-11-13 | Reinforcing structure of newly-added offset column on existing building and construction method thereof |
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| CN112376935A true CN112376935A (en) | 2021-02-19 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102031876A (en) * | 2009-09-29 | 2011-04-27 | 中冶天工上海十三冶建设有限公司 | Method for newly adding upright column for building |
| CN106401207A (en) * | 2016-10-13 | 2017-02-15 | 浙江杰地建筑设计有限公司 | Superimposed connection structure for additionally arranging column foundation on existing building and construction method of superimposed connection structure |
| US20180142482A1 (en) * | 2015-06-09 | 2018-05-24 | Sanyohome Co., Ltd. | Construction method for reinforcing a column and reinforcing structure for a column |
| CN209011615U (en) * | 2018-10-25 | 2019-06-21 | 沈阳天兴建筑工程有限公司 | A kind of underground space upper cover building conversion beam ruggedized construction |
-
2020
- 2020-11-13 CN CN202011266752.4A patent/CN112376935A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102031876A (en) * | 2009-09-29 | 2011-04-27 | 中冶天工上海十三冶建设有限公司 | Method for newly adding upright column for building |
| US20180142482A1 (en) * | 2015-06-09 | 2018-05-24 | Sanyohome Co., Ltd. | Construction method for reinforcing a column and reinforcing structure for a column |
| CN106401207A (en) * | 2016-10-13 | 2017-02-15 | 浙江杰地建筑设计有限公司 | Superimposed connection structure for additionally arranging column foundation on existing building and construction method of superimposed connection structure |
| CN209011615U (en) * | 2018-10-25 | 2019-06-21 | 沈阳天兴建筑工程有限公司 | A kind of underground space upper cover building conversion beam ruggedized construction |
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