CN113756603A - Method for connecting externally-added ring beam with original structure wall body by adopting L-shaped anchor bars and construction method - Google Patents
Method for connecting externally-added ring beam with original structure wall body by adopting L-shaped anchor bars and construction method Download PDFInfo
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- CN113756603A CN113756603A CN202111146932.3A CN202111146932A CN113756603A CN 113756603 A CN113756603 A CN 113756603A CN 202111146932 A CN202111146932 A CN 202111146932A CN 113756603 A CN113756603 A CN 113756603A
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- shaped anchor
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000010276 construction Methods 0.000 title claims description 13
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 18
- 239000010959 steel Substances 0.000 claims abstract description 18
- 239000004568 cement Substances 0.000 claims abstract description 16
- 230000002787 reinforcement Effects 0.000 claims abstract description 10
- 238000004873 anchoring Methods 0.000 claims abstract description 4
- 239000002002 slurry Substances 0.000 claims abstract description 4
- 239000002585 base Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- 239000004567 concrete Substances 0.000 claims description 8
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 6
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 4
- 239000003513 alkali Substances 0.000 claims description 3
- 239000003638 chemical reducing agent Substances 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 3
- 230000035772 mutation Effects 0.000 abstract description 2
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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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
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/02—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls built-up from layers of building elements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/20—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/162—Connectors or means for connecting parts for reinforcements
-
- 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
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
-
- 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
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
-
- 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
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
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- Environmental & Geological Engineering (AREA)
- Emergency Management (AREA)
- Business, Economics & Management (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The invention relates to a method for connecting and constructing an external ring beam and an original structural wall body by adopting L-shaped anchor bars, which comprises the L-shaped anchor bars, the external ring beam, a ring beam stirrup, longitudinal steel bars and anchor holes; the external ring beam forms a closed whole along the periphery of the building; the L-shaped anchor bars and the external ring beam are integrally cast; the anchoring depth of the L-shaped anchor bars in the original structural wall body is 150 mm-200 mm; the anchor slurry of the L-shaped anchor bar in the anchor hole of the wall body is grouted by cement-based antirust mortar; the L-shaped anchor bars are preferably arranged on two sides of a door and window opening of the original structural wall body, and the horizontal distance between the L-shaped anchor bars is 1000-2000 mm; and the L-shaped anchor bars are bound and poured with the longitudinal steel bars of the external ring beam and the hoop reinforcements of the ring beam. Therefore, the new structure and the old structure are reliably connected with each other in a pulling mode, the common stress is guaranteed, and the rigidity mutation of each layer is prevented.
Description
Technical Field
The invention relates to a method for connecting an external ring beam with an original structural wall body by adopting L-shaped anchor bars and constructing the same, belonging to the technical field of comprehensive reconstruction of existing buildings.
Background
At present, masonry structure houses are the main structural form in the existing buildings in China, and account for more than sixty percent of civil buildings. However, the basic materials and connection mode of the masonry structure determine the shortages of brittle property, small deformation capability, poor seismic performance and the like of the structure, and the seismic damage is serious in the earthquake of all times. Therefore, the research on the seismic reinforcement of masonry structures is an important problem to be solved in the current structural engineering. The most common reinforcement method of masonry structures is an earthquake-resistant reinforcement method that an outer wall adopts reinforced concrete ring beams, constructional columns and inner transverse walls with steel pull rods, and the reinforcement method is safe and reliable after multiple earthquake verifications, and particularly the anti-structural collapse capability is obviously improved, so the reinforcement method is often adopted in earthquake-resistant reinforcement. The invention mainly aims at the L-shaped anchor bar connection between the masonry structure outer ring beam and the original structure wall and the construction method thereof.
Disclosure of Invention
The invention provides a method for connecting an external ring beam with an original structural wall by adopting L-shaped anchor bars and a construction method, which are mainly used for enhancing the collapse resistance of a structure and the toughness of the structure.
The technical scheme of the invention is as follows:
the externally-added ring beam and the original structural wall body are connected by adopting an L-shaped anchor bar and a construction method, and the construction method comprises the L-shaped anchor bar, the externally-added ring beam, a ring beam stirrup, a longitudinal steel bar and an anchor hole; the external ring beam forms a closed whole along the periphery of the building; the L-shaped anchor bars and the external ring beam are integrally cast; the anchoring depth of the L-shaped anchor bars in the original structural wall body is 150 mm-200 mm; the anchor slurry of the L-shaped anchor bar in the anchor hole of the wall body is grouted by cement-based antirust mortar; the L-shaped anchor bars are preferably arranged on two sides of a door and window opening of the original structural wall body, and the horizontal distance between the L-shaped anchor bars is 1000-2000 mm; and the L-shaped anchor bars are bound and poured with the longitudinal steel bars of the external ring beam and the hoop reinforcements of the ring beam.
Furthermore, the diameter of an anchor hole of the L-shaped anchor bar is 18-25 mm, and the depth of the anchor hole is 150-200 mm.
Furthermore, the strength grade of the concrete of the external ring beam is not lower than C35.
Furthermore, the diameter of the L-shaped anchor bar is not less than 14.
Furthermore, the ring beam stirrups are phi 10 hot rolled steel bars of HBP300 or HRB335 grade, and the spacing between the ring beam stirrups is not more than 100 mm.
Furthermore, the height of the section of the external ring beam is not less than 180mm, and the width of the external ring beam is not less than 120 mm.
Furthermore, the cement base material antirust mortar is prepared from polyvinyl alcohol fibers, the cement base material antirust mortar for filling the anchor hole is added with a water reducing agent to prepare compact mortar, and the doping volume ratio of the polyvinyl alcohol fibers is not more than 2%.
Further, the configuration strength of the cement-based antirust mortar is not less than M10.
The method for connecting and constructing the externally-added ring beam and the original structural wall body by adopting the L-shaped anchor bars comprises the following steps:
the method comprises the following steps: and (4) blanking the L-shaped anchor bars and the reinforcing steel bars according to a design drawing.
Step two: before construction, the shortness alkali, oil stain or the veneer layer of the wall surface is removed, and the wall surface to be constructed is plastered and reinforced.
Step three: according to a design drawing, drilling anchor holes in the original structure wall, wherein the depth is 150-200 mm.
Step four: and (4) arranging steel bars and stirrups before pouring the L-shaped anchor bars and the external ring beam, and supporting a template.
Step five: grouting cement base material antirust mortar into the anchor hole of the L-shaped anchor bar, and simultaneously carrying out concrete continuous pouring on the external ring beam.
Step six: and the top of the external ring beam is well flooded outwards, and the bottom surface of the external ring beam is provided with a water dripping groove.
Has the advantages that:
the most obvious advantage of the invention is that the external ring beam and the L-shaped anchor bars are integrally cast, so that the new structure and the old structure are reliably connected with each other in a pulling way, the common stress is ensured, and the rigidity mutation of each layer is prevented. The method is adopted for reinforcement, and is suitable for non-ultrahigh and non-ultralimit masonry structures. Meanwhile, the method can not modify the trend of water and electric pipelines and has the advantages of small engineering quantity, quick construction progress, low construction cost and the like.
Drawings
FIG. 1 is a schematic plane view of an external ring beam and an original structural wall body connected by L-shaped anchor bars;
fig. 2 is a sectional view taken along line B-B of fig. 1.
In the figure, 1: l-shaped anchor bars; 2: an external ring beam; 3: an original structure wall body; 4: longitudinal reinforcing steel bars; 5: a hoop beam; 6: and (4) an anchor hole.
Detailed Description
The externally-added ring beam and the original structural wall body are connected by adopting an L-shaped anchor bar and a construction method, and as shown in the figures 1 to 2, the externally-added ring beam comprises an L-shaped anchor bar 1, an externally-added ring beam 2, a ring beam stirrup 5, longitudinal steel bars 4 and anchor holes 6; the external ring beam 2 forms a closed whole along the periphery of the building; the L-shaped anchor bars 1 and the external ring beam 2 are integrally cast; the anchoring depth of the L-shaped anchor bars 1 in the original structure wall 3 is 150 mm-200 mm; the anchor slurry of the L-shaped anchor bar 1 in the anchor hole 6 of the original structural wall 3 is grouted by cement-based antirust mortar; the L-shaped anchor bars 1 are preferably arranged at two sides of a door and window opening of the original structural wall 3, and the horizontal distance is 1000-2000 mm; the L-shaped anchor bars 1 are bound and poured with longitudinal steel bars 4 and ring beam stirrups 5 in the external ring beam 2.
Furthermore, the diameter of the anchor hole 6 of the L-shaped anchor bar 1 is 18 mm-25 mm, and the depth of the anchor hole 6 is 150 mm-200 mm.
Further, the concrete strength grade of the external ring beam 2 is not lower than C35.
Furthermore, the diameter of the L-shaped anchor bar 1 is not less than 14.
Furthermore, the ring beam stirrups 5 are phi 10 hot rolled steel bars of HBP300 or HRB335 grade, and the spacing between the hot rolled steel bars is not more than 100 mm.
Further, the height of the section of the external ring beam 2 is not less than 180mm, and the width of the section of the external ring beam is not less than 120 mm.
Furthermore, the cement base material antirust mortar is prepared from polyvinyl alcohol fibers, the cement base material antirust mortar for filling the anchor hole 6 is added with a water reducing agent to prepare compact mortar, and the doping volume ratio of the polyvinyl alcohol fibers is not more than 2%.
Further, the configuration strength of the cement-based antirust mortar is not less than M10.
The method for connecting and constructing the externally-added ring beam and the original structural wall body by adopting the L-shaped anchor bars comprises the following steps:
the method comprises the following steps: and (4) blanking the L-shaped anchor bars 1 and the reinforcing steel bars according to a design drawing.
Step two: before construction, the shortness alkali, oil stain or the veneer layer of the wall surface is removed, and the wall surface to be constructed is plastered and reinforced.
Step three: according to a design drawing, drilling an anchor hole 6 with the depth of 150 mm-200 mm in the original structure wall body 3.
Step four: and (3) arranging the steel bars and the stirrups before pouring the L-shaped anchor bars 1 and the external ring beam 2, and supporting the template.
Step five: the method comprises the steps of firstly grouting cement base material antirust mortar into the anchor holes 6 of the L-shaped anchor bars 1, and simultaneously carrying out continuous concrete pouring on the outer ring beam 2.
Step six: the top of the external ring beam 2 is well flooded outwards, and the bottom surface is provided with a drip groove.
The invention is a typical embodiment of the invention, the concrete implementation of the invention is not limited to the embodiment, and the invention patent of 'adopting concrete pin key connection and construction method for the external ring beam and the original structure wall' is also applied.
Claims (9)
1. The method for connecting and constructing the externally-added ring beam and the original structural wall body by adopting the L-shaped anchor bars is characterized in that: comprises L-shaped anchor bars (1), an external ring beam (2), a ring beam stirrup (5), longitudinal steel bars (4) and anchor holes (6); the external ring beam (2) forms a closed whole along the periphery of the building; the L-shaped anchor bars (1) and the external ring beam (2) are integrally cast; the anchoring depth of the L-shaped anchor bars (1) in the original structural wall body (3) is 150-200 mm; the anchor slurry of the L-shaped anchor bar (1) in the anchor hole (6) of the original structural wall (3) is grouted by cement-based antirust mortar; the L-shaped anchor bars (1) are preferably arranged at two sides of a door and window opening of the original structural wall body (3), and the horizontal distance is 1000-2000 mm; the L-shaped anchor bars (1) are bound and poured with longitudinal steel bars (4) and hoop reinforcements (5) of the ring beam in the external ring beam (2).
2. The method for connecting and constructing the externally-added ring beam and the original structural wall body by adopting the L-shaped anchor bars as claimed in claim 1 is characterized in that: the diameter of the L-shaped anchor bar (1) is not less than phi 14 of the hot rolled steel bar.
3. The method for connecting and constructing the externally-added ring beam and the original structural wall body by adopting the L-shaped anchor bars as claimed in claim 1 is characterized in that: the diameter of the anchor hole (6) of the L-shaped anchor bar (1) is 18-25 mm, and the depth of the anchor hole (6) is 150-200 mm.
4. The method for connecting and constructing the externally-added ring beam and the original structural wall body by adopting the L-shaped anchor bars as claimed in claim 1 is characterized in that: the concrete strength grade of the external ring beam (2) is not lower than C35.
5. The method for connecting and constructing the externally-added ring beam and the original structural wall body by adopting the L-shaped anchor bars as claimed in claim 1 is characterized in that: the ring beam stirrups (5) are phi 10 hot rolled steel bars with HBP300 or HRB335 grades, and the space between the hot rolled steel bars is not more than 100 mm.
6. The method for connecting and constructing the externally-added ring beam and the original structural wall body by adopting the L-shaped anchor bars as claimed in claim 1 is characterized in that: the height of the section of the external ring beam (2) is not less than 180mm, and the width of the external ring beam is not less than 120 mm.
7. The method for connecting and constructing the externally-added ring beam and the original structural wall body by adopting the L-shaped anchor bars as claimed in claim 1 is characterized in that: the cement base material antirust mortar is prepared from polyvinyl alcohol fibers, the cement base material antirust mortar for filling the anchor hole (6) is added with a water reducing agent to prepare compact mortar, and the doping volume ratio of the polyvinyl alcohol fibers is not more than 2.5%.
8. The method for connecting and constructing the externally-added ring beam and the original structural wall body by adopting the L-shaped anchor bars as claimed in claim 1 is characterized in that: the preparation strength of the cement-based antirust mortar is not less than M12.
9. The method for connecting and constructing the externally-added ring beam and the original structure wall body by adopting the L-shaped anchor bars as claimed in any one of claims 1 to 8 is characterized in that: the method comprises the following steps:
the method comprises the following steps: and (3) blanking the L-shaped anchor bars (1) and the reinforcing steel bars according to a design drawing.
Step two: before construction, the shortness alkali, oil stain or the veneer layer of the wall surface is removed, and the wall surface to be constructed is plastered and reinforced.
Step three: according to a design drawing, drilling an anchor hole (6) in the original structure wall (3) with the depth of 150-200 mm.
Step four: and arranging the steel bars and the stirrups before pouring the L-shaped anchor bars (1) and the outer ring beam (2), and supporting the template.
Step five: the method comprises the steps of grouting cement base antirust mortar into anchor holes (6) of the L-shaped anchor bars (1), and simultaneously carrying out continuous concrete pouring on the outer ring beam (2).
Step six: the top of the external ring beam (2) is provided with an outward flashing, and the bottom surface is provided with a water dripping groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111146932.3A CN113756603A (en) | 2021-09-28 | 2021-09-28 | Method for connecting externally-added ring beam with original structure wall body by adopting L-shaped anchor bars and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111146932.3A CN113756603A (en) | 2021-09-28 | 2021-09-28 | Method for connecting externally-added ring beam with original structure wall body by adopting L-shaped anchor bars and construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113756603A true CN113756603A (en) | 2021-12-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111146932.3A Pending CN113756603A (en) | 2021-09-28 | 2021-09-28 | Method for connecting externally-added ring beam with original structure wall body by adopting L-shaped anchor bars and construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113756603A (en) |
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2021
- 2021-09-28 CN CN202111146932.3A patent/CN113756603A/en active Pending
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