CN116950440A - Method for adding constructional columns to brick masonry wall through bar planting - Google Patents
Method for adding constructional columns to brick masonry wall through bar planting Download PDFInfo
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- CN116950440A CN116950440A CN202310722227.6A CN202310722227A CN116950440A CN 116950440 A CN116950440 A CN 116950440A CN 202310722227 A CN202310722227 A CN 202310722227A CN 116950440 A CN116950440 A CN 116950440A
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000011449 brick Substances 0.000 title claims abstract description 20
- 239000004567 concrete Substances 0.000 claims abstract description 35
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 29
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 28
- 239000010959 steel Substances 0.000 claims abstract description 28
- 239000000835 fiber Substances 0.000 claims abstract description 25
- 239000002344 surface layer Substances 0.000 claims abstract description 8
- 230000000149 penetrating effect Effects 0.000 claims abstract description 7
- 238000011049 filling Methods 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 6
- 239000000853 adhesive Substances 0.000 claims abstract description 5
- 230000001070 adhesive effect Effects 0.000 claims abstract description 5
- 239000003822 epoxy resin Substances 0.000 claims abstract description 5
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 5
- 239000011248 coating agent Substances 0.000 claims abstract description 3
- 238000000576 coating method Methods 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 12
- 239000010881 fly ash Substances 0.000 claims description 12
- 230000002787 reinforcement Effects 0.000 claims description 12
- 239000004568 cement Substances 0.000 claims description 10
- 239000004576 sand Substances 0.000 claims description 8
- 229910021487 silica fume Inorganic materials 0.000 claims description 8
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 238000002513 implantation Methods 0.000 claims description 3
- 239000011398 Portland cement Substances 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 229920005646 polycarboxylate Polymers 0.000 claims description 2
- 230000009467 reduction Effects 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 235000012239 silicon dioxide Nutrition 0.000 claims description 2
- 238000010276 construction Methods 0.000 description 10
- 238000004140 cleaning Methods 0.000 description 8
- 230000008901 benefit Effects 0.000 description 5
- 239000004574 high-performance concrete Substances 0.000 description 5
- 239000010410 layer Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000011010 flushing procedure Methods 0.000 description 3
- 238000009415 formwork Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 2
- 238000002407 reforming Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- 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
- E04G23/0203—Arrangements for filling cracks or cavities in building constructions
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/2038—Resistance against physical degradation
- C04B2111/2053—Earthquake- or hurricane-resistant materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Mechanical Engineering (AREA)
- Electrochemistry (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention relates to a method for adding constructional columns to a brick masonry wall through bar planting, which comprises the following steps: 1: determining the joint of the longitudinal wall and the transverse wall at the position where the constructional column is additionally arranged; 2: removing the wall body at the position where the constructional column is additionally arranged to form a plurality of vertical grooves; the binding material in the horizontal mortar joint is removed along the height direction of the part added with the constructional column, and the horizontal mortar joint is cleaned; 3: penetrating stirrups into the cleaned horizontal mortar joints, arranging vertical steel bars in the vertical grooves, binding the stirrups and the vertical steel bars, and filling the horizontal mortar joints penetrating the stirrups with mortar or epoxy resin adhesive; 4: supporting a template along the periphery of the part where the constructional column is additionally arranged, pouring concrete into the template, and removing the template after curing; 5: and coating high-ductility fiber concrete on the surface of the part where the constructional column is additionally arranged to form a high-ductility fiber concrete surface layer. The method can effectively strengthen the masonry structure building by additionally arranging the constructional columns while the appearance of the original building is not changed.
Description
Technical Field
The invention belongs to the technical field of earthquake-resistant reinforcement of building structures, and particularly relates to a method for adding constructional columns to a brickwork wall through bar planting.
Background
Compared with reinforced concrete structure, the masonry structure has the advantages of low cost, convenient construction, simple process and the like. The masonry structure has better durability and fire resistance, better heat preservation, heat insulation and sound insulation performances, obvious energy-saving effect and easy satisfaction of building function requirements. The masonry structure has the further characteristic that the compressive strength is far greater than the tensile strength and the shear strength, and is particularly suitable for the application taking the pressed as a main component. With the progress of society and the increasing of the living standard of people, many existing masonry mixed buildings cannot meet the normal use requirements of people. The old brick-concrete house with poor earthquake resistance seriously threatens the life and property safety of people in the earthquake. The method for reforming and reinforcing the old masonry mixed structure house has the following advantages compared with the newly-built house: the method has the advantages of short construction period, less investment and good benefit, so the method is a feasible method for reinforcing and reforming the house with the existing old masonry mixed structure.
The addition of constructional columns to the masonry structure is an effective anti-seismic reinforcement method. At present, a common method for adding constructional columns is to add concrete buttress columns, and connect the constructional columns with the original wall body through wall penetrating steel bars, so as to achieve the reinforcing effect. Aiming at the masonry structure, under the action of earthquake motion encountering the same PGA, the maximum value of the displacement angle between the bottom layers of the structure is gradually reduced along with the increase of the arrangement quantity of constructional columns, and the earthquake resistance of the whole structure is gradually enhanced. Therefore, when the masonry structure is designed and built, the constructional columns are required to be arranged strictly according to the requirements of building earthquake-resistant design Specification (GB 50010-2010), and the arrangement number of the constructional columns is properly increased under the condition of economic condition permission, and the number of the constructional columns lower than the standard or the constructional columns not required to be arranged are not required to be arranged. The construction process is complex by adding constructional columns to the masonry structure, and the construction process is complex by adding constructional columns outside the building, so that the appearance of the building is seriously affected, and the structural intervention can be forbidden for building/aesthetic reasons or structures with high cultural value. Therefore, the masonry structure can be effectively reinforced with minimum modification, and the masonry structure is an urgent problem to be solved.
Disclosure of Invention
The invention provides a method for adding constructional columns to a brick masonry wall through reinforcement, which can effectively strengthen a masonry structure building through adding constructional columns while the appearance of the original building is not changed.
The technical scheme of the invention is as follows:
a method for adding constructional columns to a brick masonry wall through bar planting comprises the following steps:
step 1: the surface of the wall body at the joint of the longitudinal wall and the transverse wall extends longitudinally and transversely for a dimension range of a brick length, so that the wall body is determined as a part for additionally arranging a constructional column, and the surface of the wall body at the part is cleaned;
step 2: removing the wall body with the depth of 60-80 mm at the position where the constructional column is additionally arranged to form a plurality of vertical grooves; the binding materials in the horizontal mortar joints at the corresponding positions are removed along the height direction of the parts added with the constructional column, and the removed horizontal mortar joints are cleaned;
step 3: penetrating stirrups into the cleaned horizontal mortar joints, arranging vertical steel bars in the vertical grooves, binding the stirrups and the vertical steel bars, and filling the horizontal mortar joints penetrating the stirrups with mortar or epoxy resin adhesive;
step 4: supporting a template along the periphery of the part where the constructional column is additionally arranged, pouring concrete into the template, and removing the template after curing;
step 5: and coating high-ductility fiber concrete on the surface of the part where the constructional column is additionally arranged to form a high-ductility fiber concrete surface layer.
Further, in the method for adding constructional columns to the brickwork wall through the bar planting, in the step 3, the vertical steel bars adopt hot rolled ribbed steel bars, and the strength level is 335MPa; the stirrup is made of common hot-rolled plain round steel bars, and the strength grade is 300MPa.
Further, in the method for adding constructional columns to the brickwork wall through the planted bars, in the step 4, the concrete is C40 concrete.
Further, in the method for adding constructional columns to the brickwork wall through the planted bars, in the step 5, the high-ductility fiber concrete comprises the following components in percentage by mass: and (3) cement: fly ash: silica fume: sand: water = 1:0.9:0.1:0.76:0.58; the volume mixing amount of PVA fiber is 1.5% based on the total volume of cement, flyash, silica fume, sand and water.
Further, in the method for adding constructional columns to the brickwork wall through the reinforcement implantation, the cement is P.O.52.5R Portland cement; the fly ash is class I fly ash; less than 6% loss on ignition, more than 85% silicon dioxide content, and more than 15000m specific surface area 2 /kg; the maximum grain diameter of the sand is 1.26mm; the PVA fiber has a length of 6 to 12mm, a diameter of 26 μm or more, a tensile strength of 1200MPa or more, and an elastic modulus of 30GPa or more.
Further, in the method for adding constructional columns to the brick masonry wall through the reinforcement planting, the polycarboxylate water reducer with the water reduction rate of more than 30% is added into the high-ductility fiber concrete, and the addition amount of the water reducer is 0.8% of the total mass of the fly ash, the silica fume and the cement.
Further, the method for adding constructional columns to the brick masonry wall through the reinforcement implantation comprises the following steps of: after cement, silica fume, fly ash and sand are evenly dry-mixed, adding a water reducing agent and 80% of water and evenly stirring; and adding PVA fiber, stirring uniformly, adding the rest 20% of water, and stirring uniformly.
The beneficial effects of the invention are as follows:
(1) The invention can effectively stabilize and protect the building structures of the masonry structure, such as the agricultural houses, historic buildings and the like, and the added constructional column does not occupy space and does not influence the appearance of the building.
(2) According to the invention, the embedded stirrups are bound with the vertical steel bars, so that the integrity between the newly-added constructional column and the wall body is effectively improved.
(3) According to the invention, the high-performance concrete is poured at the position of the additionally arranged constructional column, so that the economic benefit is considered, and meanwhile, the integrity and the earthquake resistance of the wall are obviously improved by virtue of the mechanical property of the high-performance concrete.
(4) The invention adopts high-ductility fiber concrete to prepare the surface layer, the compressive strength can reach more than 60MPa, the ultimate tensile strain can reach more than 100 times of that of common concrete, the surface layer has plastic deformation capacity similar to steel, and good bonding performance with brick masonry, is an ecological building material with high strength, high ductility, high durability and high damage resistance, can effectively avoid local crushing of the wall, and remarkably improves the integrity and the earthquake resistance of the wall.
Drawings
FIG. 1 is a schematic view of an additional column structure at the junction of the L-shaped cross walls in embodiment 1;
FIG. 2 is a three-dimensional schematic diagram of an additional column at the junction of the L-shaped cross walls in embodiment 1;
FIG. 3 is a schematic diagram of a T-shaped cross wall joint added with a constructional column in embodiment 2;
FIG. 4 is a schematic diagram of a structure in which a column is added at the junction of the cross-shaped longitudinal and transverse walls in embodiment 3;
in the figure: 1 is a transverse wall; 2 is a longitudinal wall; 3 is a transverse wall stirrup; 4 is a longitudinal wall stirrup; 5 is a vertical steel bar; 6 is concrete; 7 is a high-ductility fiber concrete surface layer; 8 is the surface layer of the raw mortar.
Detailed Description
Example 1
The building to be reinforced is a two-layer brick-concrete structure office building, the wall thickness of brick masonry is 240mm, and the earthquake-proof fortification intensity is 7 degrees. The construction column is additionally arranged at the joint of the L-shaped longitudinal and transverse walls of the corner of the house, the size of the construction column is a size range which extends longitudinally and transversely by one brick length at the joint of the longitudinal and transverse walls, namely 240mm, and the position of the construction column is determined. As shown in fig. 1 and 2, the specific construction steps are as follows:
(1) And determining the position of the additionally arranged constructional column at the joint of the L-shaped longitudinal wall and the L-shaped transverse wall, removing the wall plastering of the position of the additionally arranged constructional column, cleaning by using a high-pressure water gun, and clearly exposing the brickwork.
(2) And removing the wall body with the depth of 70mm at the joint of the transverse wall 1 and the longitudinal wall 2 to form 7 square vertical grooves.
(3) At the internal corner of the junction of the transverse wall 1 and the longitudinal wall 2, brick walls with the depth of 70mm are respectively extended and removed towards the longitudinal wall 2 and the transverse wall 1 to form 1L-shaped vertical groove.
(4) And (3) cleaning the bonding material in the horizontal mortar joint at the corresponding position along the height direction of the position where the constructional column is additionally arranged, and flushing the cleaned horizontal mortar joint by using a high-pressure water gun. After cleaning, the horizontal mortar joint is penetrated with transverse wall stirrups 3 and longitudinal wall stirrups 4, and then vertical steel bars 5 are planted in the square vertical grooves and the L-shaped vertical grooves (in order to ensure that the stirrups can smoothly penetrate into the joint, the order cannot be reversed). The vertical steel bars 5 are hot rolled ribbed steel bars, the strength grade is 335MPa, the diameter is 12mm, and 8 square vertical grooves and one L-shaped vertical groove are respectively arranged. The transverse wall stirrups 3 and the longitudinal wall stirrups 4 are made of common hot-rolled plain round steel bars, and the strength level is 300MPa. And binding the transverse wall stirrups 3, the longitudinal wall stirrups 4 and the vertical steel bars 5 after the steel bar planting is finished. And finally filling the cleaned horizontal mortar joint with mortar.
(5) And along the periphery of the additionally-arranged constructional column, the constructional column is tightly attached to the wall formwork.
(6) And pouring high-performance concrete 6 into the square vertical grooves and the L-shaped vertical grooves, and removing the mould after 2-3 days of curing.
(7) The surface of the added constructional column is smeared with high-ductility fiber concrete to form a high-ductility fiber concrete surface layer 7.
Example 2
The building to be reinforced is a four-layer brick-concrete structure office building, the wall thickness of brick masonry is 240mm, and the earthquake-proof fortification intensity is 7 degrees. The constructional column is additionally arranged at the joint of the longitudinal wall and the transverse wall in the middle of the house, the size of the constructional column is that one brick length extends longitudinally and transversely at the joint of the transverse wall 1 and the longitudinal wall 2, namely 240mm, and the size range of the constructional column is determined. As shown in fig. 3, the upper straight section is taken as the outer side of the transverse wall 1, and the lower corner portion is taken as the inner corner portion of the transverse wall.
The concrete construction steps are as follows:
(1) Determining the position of an additional constructional column at the joint position of the T-shaped longitudinal wall, wherein the position of the additional constructional column comprises 2 joints (internal corner positions) of the outer side of the transverse wall 1 and the longitudinal wall 2 and 2 joints (internal corner positions) of the inner side of the transverse wall 1 and the longitudinal wall 2; and (3) removing the wall plastering of the additionally arranged constructional column part, cleaning by using a high-pressure water gun, and clearly exposing the brick masonry.
(2) And removing the wall body with the depth of 70mm at 2 junctions of the transverse wall 1 and the longitudinal wall 2 to form 8 square vertical grooves.
(3) And at the internal corner of the joint of the longitudinal wall and the transverse wall, respectively extending towards the longitudinal wall 2 and the transverse wall 1 to remove the wall body with the depth of 70mm, so as to form 2L-shaped vertical grooves.
(4) And (3) cleaning the bonding material in the horizontal mortar joint at the corresponding position along the height direction of the position where the constructional column is additionally arranged, and flushing the cleaned horizontal mortar joint by using a high-pressure water gun. After the cleaning is finished, transverse wall stirrups 3 and longitudinal wall stirrups 4 are penetrated into the cleaned horizontal mortar joints, and then vertical steel bars 5 are implanted into the square vertical grooves and the L-shaped vertical grooves. 10 vertical steel bars 5 are arranged in total. And binding the transverse wall stirrups 3, the longitudinal wall stirrups 4 and the vertical steel bars 5 after the steel bar planting is finished. Finally filling the cleaned horizontal mortar joint with an epoxy resin adhesive.
(5) And along the periphery of the additionally arranged constructional column, the constructional column is tightly attached to the wall formwork.
(6) And pouring high-performance concrete 6 into the square vertical grooves and the L-shaped vertical grooves, and removing the mould after 2-3 days of curing.
(7) The column surface is coated with high-ductility fiber concrete to form a high-ductility fiber concrete facing 7.
Example 3
The building to be reinforced is a six-layer brick-concrete structure office building, the wall thickness of brick masonry is 240mm, the earthquake fortification intensity is 8 degrees, and constructional columns are additionally arranged at the joints of longitudinal and transverse walls at the corners of the house. The constructional columns are dimensioned to extend a brick length of 240mm longitudinally and transversely, respectively, at the intersections of the longitudinal and transverse walls. As shown in fig. 4, the cross wall 1 and the longitudinal wall 2 meet to form 4 corners.
The concrete construction steps are as follows:
(1) The joint position of the cross type longitudinal wall and the cross type transverse wall is provided with 4 internal corner positions; the wall plastering at the 4 internal corners is removed, and the wall plastering is cleaned by a high-pressure water gun, so that the brick masonry is clearly exposed.
(2) And removing the wall body with the depth of 70mm at 4 junctions of the transverse wall 1 and the longitudinal wall 2 to form 8 square vertical grooves. And at the internal corner of the joint of the longitudinal wall and the transverse wall, the wall body with the depth of 80mm is respectively removed by extending towards the longitudinal wall 2 and the transverse wall 1 to form 4L-shaped vertical grooves.
(3) And (3) cleaning the bonding material in the horizontal mortar joint at the corresponding position along the height direction of the position where the constructional column is additionally arranged, and flushing the cleaned horizontal mortar joint by using a high-pressure water gun. After the cleaning is finished, transverse wall stirrups 3 and longitudinal wall stirrups 4 are penetrated into the cleaned horizontal mortar joints, and then vertical steel bars 5 are implanted into the square vertical grooves and the L-shaped vertical grooves. The number of the vertical steel bars 5 is 12 in total. And binding the transverse wall stirrups 3, the longitudinal wall stirrups 4 and the vertical steel bars 5 after the steel bar planting is finished. Finally filling the cleaned horizontal mortar joint with an epoxy resin adhesive.
(4) And along the periphery of the additionally arranged constructional column, the constructional column is tightly attached to the wall formwork.
(5) And pouring high-performance concrete 6 into the square vertical grooves and the L-shaped vertical grooves, and removing the mould after 2-3 days of curing.
(6) The column surface is coated with high-ductility fiber concrete to form a high-ductility fiber concrete facing 7.
Claims (7)
1. A method for adding constructional columns to a brick masonry wall through bar planting is characterized by comprising the following steps:
step 1: the surface of the wall body at the joint of the longitudinal wall and the transverse wall extends longitudinally and transversely for a dimension range of a brick length, so that the wall body is determined as a part for additionally arranging a constructional column, and the surface of the wall body at the part is cleaned;
step 2: removing the wall body with the depth of 60-80 mm at the position where the constructional column is additionally arranged to form a plurality of vertical grooves; the binding materials in the horizontal mortar joints at the corresponding positions are removed along the height direction of the parts added with the constructional column, and the removed horizontal mortar joints are cleaned;
step 3: penetrating stirrups into the cleaned horizontal mortar joints, arranging vertical steel bars in the vertical grooves, binding the stirrups and the vertical steel bars, and filling the horizontal mortar joints penetrating the stirrups with mortar or epoxy resin adhesive;
step 4: supporting a template along the periphery of the part where the constructional column is additionally arranged, pouring concrete into the template, and removing the template after curing;
step 5: and coating high-ductility fiber concrete on the surface of the part where the constructional column is additionally arranged to form a high-ductility fiber concrete surface layer.
2. The method for adding constructional columns to a masonry wall through reinforcement implantation according to claim 1, wherein in the step 3, the vertical reinforcement is hot rolled ribbed reinforcement with a strength level of 335MPa; the stirrup is made of common hot-rolled plain round steel bars, and the strength grade is 300MPa.
3. The method for adding constructional columns to a masonry wall by means of reinforcement according to claim 1, wherein in step 4, the concrete is C40 concrete.
4. The method for adding constructional columns to a masonry wall by means of reinforcing bars according to claim 1, wherein in the step 5, the high-ductility fiber concrete comprises the following components in percentage by mass: and (3) cement: fly ash: silica fume: sand: water = 1:0.9:0.1:0.76:0.58; the volume mixing amount of PVA fiber is 1.5% based on the total volume of cement, flyash, silica fume, sand and water.
5. The method for adding constructional columns to a masonry wall by means of reinforcement according to claim 4, wherein the cement is p.o.52.5r portland cement; the fly ash is class I fly ash; less than 6% loss on ignition, more than 85% silicon dioxide content, and more than 15000m specific surface area 2 /kg; the maximum grain diameter of the sand is 1.26mm; the PVA fiber has a length of 6 to 12mm, a diameter of 26 μm or more, a tensile strength of 1200MPa or more, and an elastic modulus of 30GPa or more.
6. The method for adding constructional columns to a masonry wall through reinforcement according to claim 5, wherein the high-ductility fiber concrete is added with a polycarboxylate water reducer with a water reduction rate of more than 30%, and the addition amount of the water reducer is 0.8% of the total mass of fly ash, silica fume and cement.
7. The method for adding constructional columns to a masonry wall by means of reinforcing bars according to claim 6, wherein the method for preparing the high-ductility fiber concrete is as follows: after cement, silica fume, fly ash and sand are evenly dry-mixed, adding a water reducing agent and 80% of water and evenly stirring; and adding PVA fiber, stirring uniformly, adding the rest 20% of water, and stirring uniformly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310722227.6A CN116950440A (en) | 2023-06-19 | 2023-06-19 | Method for adding constructional columns to brick masonry wall through bar planting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310722227.6A CN116950440A (en) | 2023-06-19 | 2023-06-19 | Method for adding constructional columns to brick masonry wall through bar planting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116950440A true CN116950440A (en) | 2023-10-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310722227.6A Pending CN116950440A (en) | 2023-06-19 | 2023-06-19 | Method for adding constructional columns to brick masonry wall through bar planting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116950440A (en) |
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2023
- 2023-06-19 CN CN202310722227.6A patent/CN116950440A/en active Pending
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