CN107916796A - A kind of structure for lifting old building load-carrying properties - Google Patents
A kind of structure for lifting old building load-carrying properties Download PDFInfo
- Publication number
- CN107916796A CN107916796A CN201711245575.XA CN201711245575A CN107916796A CN 107916796 A CN107916796 A CN 107916796A CN 201711245575 A CN201711245575 A CN 201711245575A CN 107916796 A CN107916796 A CN 107916796A
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- Prior art keywords
- deformed bar
- reinforcing rib
- steel
- wall
- angle steel
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 65
- 239000010959 steel Substances 0.000 claims abstract description 65
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 50
- 210000003205 muscle Anatomy 0.000 claims abstract description 38
- 239000004567 concrete Substances 0.000 claims abstract description 35
- 238000005728 strengthening Methods 0.000 claims abstract description 15
- 238000003466 welding Methods 0.000 claims abstract description 15
- 238000005452 bending Methods 0.000 claims abstract description 13
- 238000009877 rendering Methods 0.000 claims abstract description 10
- 230000002787 reinforcement Effects 0.000 claims abstract description 9
- 239000002002 slurry Substances 0.000 claims description 34
- 239000004570 mortar (masonry) Substances 0.000 claims description 14
- 239000003292 glue Substances 0.000 claims description 9
- 238000007569 slipcasting Methods 0.000 claims description 9
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- 238000002347 injection Methods 0.000 description 18
- 239000007924 injection Substances 0.000 description 18
- 238000010276 construction Methods 0.000 description 14
- 101100334009 Caenorhabditis elegans rib-2 gene Proteins 0.000 description 12
- 239000011440 grout Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 9
- 210000002445 nipple Anatomy 0.000 description 9
- 239000004593 Epoxy Substances 0.000 description 6
- 240000002853 Nelumbo nucifera Species 0.000 description 6
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 6
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 239000011449 brick Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- 210000002435 tendon Anatomy 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 239000004568 cement Substances 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 229910003460 diamond Inorganic materials 0.000 description 3
- 239000010432 diamond Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 238000010348 incorporation Methods 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- -1 methacrylic acid Lipid Chemical class 0.000 description 3
- 239000008267 milk Substances 0.000 description 3
- 210000004080 milk Anatomy 0.000 description 3
- 235000013336 milk Nutrition 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 238000003359 percent control normalization Methods 0.000 description 3
- 230000010412 perfusion Effects 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 239000000344 soap Substances 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 238000003763 carbonization Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000004062 sedimentation Methods 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
-
- 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
- E04G23/0211—Arrangements for filling cracks or cavities in building constructions using injection
-
- 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
- E04G23/0222—Replacing or adding wall ties
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Reinforcement Elements For Buildings (AREA)
- Working Measures On Existing Buildindgs (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses it is a kind of lifted old building load-carrying properties structure, it is characterized in that wall reinforcement take it is as follows：Wall arranges non-prestressed reinforcing rib again after peeling off rendering on surface of wall one skin deformed bar of arrangement, deformed bar.Deformed bar is fixed by fixing muscle after deformed bar tensioning.Arrangement Grouting Pipe in the tensioned unit that deformed bar is formed with non-prestressed reinforcing rib, concrete beam strengthening is taken as follows：Angle steel is bent at 1/3 and 2/3, angle steel bending place cuts out triangular gap, triangular gap back side welding steel is strengthened, angle steel bending place sets fastening screw, beams of concrete following two corner is evenly distributed with angle setting steel, batten plate is welded between two corner angle steel, batten plate thickness is 10~12mm, and batten plate width is 100~120mm.
Description
Technical field
The present invention relates to a kind of old building structure, more particularly to a kind of structure for lifting old building load-carrying properties.
Background technology
Old building by long-term use after the phenomenon of depression of bearing force occurs because of a variety of causes, be mainly manifested in Old building
The wall of thing is because crack occur in the reasons such as sedimentation, or bearing capacity of wall body cannot meet the requirement of existing load；Old building
Beams of concrete is because depression of bearing force occurs in concrete carbonization, or bearing capacity occurs because of the lifting using standard and cannot reach
It is required that.Therefore for old building, the overall load effect of reinforcement structure, improves the mechanical property of structure.
The content of the invention
The present invention is to provide a kind of structure for lifting old building load-carrying properties, solves bearing capacity of wall body and concrete joist support
Carry the problem of power is inadequate.
The present invention is inadequate for strength of wall body, takes following ruggedized construction：Wall is arranged after peeling off rendering in surface of wall
One skin deformed bar, a diameter of 12~14mm of deformed bar, deformed bar spacing are 150~300mm, deformed bar
Arrange non-prestressed reinforcing rib again above, deformed bar is welded to connect with reinforcing rib, a diameter of 12~14mm of reinforcing rib,
Reinforcing rib bar spacing is 150~300mm.Just arranged direction and horizontal sextant angle are 45 degree to deformed bar, reinforcing rib arrangement side
To vertical with arranged direction at the beginning of deformed bar.Deformed bar is consolidated by fixing muscle after deformed bar tensioning
Fixed, fixing muscle is welded and fixed with deformed bar, a diameter of 14~16mm of fixing muscle.Fixing muscle spacing for 150~
300mm, each tensioned unit length are 150~300mm, and reinforcing rib is set in two terminations of tensioned unit.Deformed bar
Grouting Pipe is arranged in the tensioned unit formed with non-prestressed reinforcing rib, and slip casting tube spacing is 350~450mm, and Grouting Pipe is straight
The stainless-steel pipe of footpath 10mm, Grouting Pipe embedment wall mortar joint, length of embedment 60mm, is fixed with structure glue.Grouting Pipe
Three-way valve is set between slurry can.
Following ruggedized construction can also be used：A skin deformed bar is arranged in surface of wall, in advance after wall stripping rendering
Stress bar diameter is 12~14mm, and deformed bar spacing is 150~300mm, arranged again above deformed bar it is non-it is pre- should
Power reinforcing rib, deformed bar are welded to connect with reinforcing rib, a diameter of 12~14mm of reinforcing rib, and reinforcing rib bar spacing is
150~300mm.Just arranged direction is level to deformed bar, and reinforcing rib arranged direction is to be vertically arranged.Deformed bar tensioning
After deformed bar is fixed by fixing muscle, fixing muscle is welded and fixed with deformed bar, and fixing muscle is straight
Footpath is 14~16mm.Fixing muscle spacing is 300~600mm, and each tensioned unit length is 300~600mm, in tensioned unit
Two terminations set reinforcing rib, and row's reinforcing rib is arranged between termination vertical strengthening ribs and vertical fixing muscle.Deformed bar
Grouting Pipe is arranged in the tensioned unit formed with non-prestressed reinforcing rib, and slip casting tube spacing is 350~450mm, and Grouting Pipe is straight
The stainless-steel pipe of footpath 10mm, Grouting Pipe embedment wall mortar joint, length of embedment 60mm, is fixed with structure glue.Grouting Pipe
Three-way valve is set between slurry can.
After surface of wall sets deformed bar, wall body structure performance can have greatly improved, even structural damage
Form also can be very big improvement, from plastic failure can be transitioned into elastic break-down, obvious action is had safely to structure.
Wall reinforcement construction procedure is using as follows：
(1) rendering layer is peeled off, the embedded hole of preboring Grouting Pipe, the embedded bore dia of Grouting Pipe is 12mm；Preboring buries hole
Using electronic rotation diamond core drill, it is water-cooled drill bit and is considered to be worth doing with brick output；Using steel wire cleaning surface of wall dust and
Scum silica frost or loose position simultaneously keep drying；
(2) deformed bar is hung, deformed bar is fixed on by wall, U-iron button insertion wall ash by U-iron button
Seam；
(3) reinforcing rib is hung on deformed bar, is tentatively connected deformed bar with reinforcing rib with steel wire；
(4) prestressed stretch-draw is carried out to deformed bar, deformed bar tensioning uses lever type clamping instrument, lever
The resistance arm of clamping tool and the ratio of power arm are 0.05~0.15.Tensioning process is using as follows：Deformed bar is just opened
Tension is pulled to 10% control tension stress, holds lotus 3min and establishes primary stress, then is stretched to control tension stress, holds lotus 5min
Establish prestressing force.
(5) deformed bar is subjected to welding grappling with fixing muscle after prestressed stretch-draw, by deformed bar with adding
Strengthening tendons is welded and fixed；
(6) Grouting Pipe is buried, Grouting Pipe and the gap in embedded hole are closed using structure glue；
(7) slip casting is carried out to wall；With slip casing by pressure machinery slurries injection wall body, slip casting since being put most lower ranking, by
Step develops to both sides upwards and symmetrically, reaches expecting pressure or slurries in neighbouring injection point free flow in each injection point
Go out, injection can terminate, injection hole plug.
If slurries have leakage, leakage channel is such as can not find, slurries incorporation accelerator is continued a small amount of injections makes leakage
Passage gradually precipitates blocking.
After slurries solidification completely, remove Grouting Pipe and carry out sealing of hole.
If wall has crack, following handle is carried out before step (7)：
1) grout nipple is buried in the middle part of crack, perfusion point spacing is integrated according to fracture width and the penetration of fracture to be determined, spacing
For 200~300mm；
2) dead-end fracture, grout nipple are closed after burying using epoxy mortar, form a confined space, reserve slurries disengaging
Mouthful, then slurries are pressed into gap with syringe, fill it.
3) leakage check, applies one layer of soap along crack, is passed through compressed air from grout nipple, air leak position is repaired sealing
Untill not leaking.
4) it is in the milk, when fracture width is less than 0.3mm, after epoxy mortar dead-end fracture, then using methacrylic acid
Lipid slurry filling；When fracture width is greater than or equal to 0.3mm and is less than 1mm, using epoxy resin slurry filling；When splitting
When slit width degree is greater than or equal to 1mm, irrigated using cement grout.
According to the loading characteristic of beams of concrete, concrete beam strengthening is taken as follows：Applied at the 1/3 of beams of concrete and 2/3
Upward prestressing force is added to alleviate the maximal bending moment of beams of concrete significantly, so angle steel is bent at 1/3 and 2/3 in the present invention,
Angle steel bending place cuts out triangular gap, and triangular gap back side welding steel is strengthened, and welding steel weld width is 150
~200mm, steel plate thickness are 12~14mm.Angle steel bending place sets fastening screw, a diameter of 18~22mm of fastening screw, nut
Highly it is more than 1.5 times of screw diameter.Beams of concrete following two corner is evenly distributed with angle setting steel, left comer portion angle steel and right corner portion angle steel
Between weld batten plate, batten plate thickness is 10~12mm, and batten plate width is 100~120mm.
Beams of concrete construction procedure is using as follows：
(1) temporary support is provided below in beams of concrete；
(2) 250~300mm of brick wall of supporting beams of concrete is cut, for angle steel construction indwelling operating space；
(3) inserted angle steel after beams of concrete removing surface；
(4) fastening screw is installed, diagonal steel carries out prestressed stretch-draw；
(5) welding steel and batten plate.
Structural behaviour of the present invention is good, securely and reliably.
Brief description of the drawings
Fig. 1 is wall reinforcement structure diagram one, and Fig. 2 is wall reinforcement structure diagram two, and Fig. 3 is before concrete strengthening
Structure diagram, Fig. 4 are concrete strengthening structure diagram.
In each attached drawing：1st, deformed bar, 2, reinforcing rib, 3, fixing muscle, 4, Grouting Pipe, 5, angle steel, 6, fastening screw, 7,
Steel plate, 8, batten plate.
Embodiment
Embodiment one
The present embodiment is inadequate for strength of wall body, takes following ruggedized construction：In surface of wall cloth after wall stripping rendering
Put a skin deformed bar 1,1 a diameter of 12mm of deformed bar, 1 spacing of deformed bar is 200mm, on deformed bar 1
Non-prestressed reinforcing rib 2 is arranged in face again, and deformed bar 1 is welded to connect with reinforcing rib 2, and 2 a diameter of 12mm of reinforcing rib, adds
2 bar spacing of strengthening tendons is 200mm.Just arranged direction and horizontal sextant angle are 45 degree to deformed bar 1,2 arranged direction of reinforcing rib and
Just arranged direction is vertical for deformed bar 1, and deformed bar 1 is just arranged as Fig. 1 dotted line positions, and deformed bar 1 is after tensioning
Become solid line position.Deformed bar 1 is fixed by fixing muscle 3 after 1 tensioning of deformed bar, fixing muscle 3 with
Deformed bar 1 is welded and fixed, 3 a diameter of 14mm of fixing muscle.3 spacing of fixing muscle is 200mm, each tensioned unit length
For 200mm, reinforcing rib 2 is set in two terminations of tensioned unit.That deformed bar 1 is formed with non-prestressed reinforcing rib 2
It is 400mm to draw arrangement Grouting Pipe 4,4 spacing of Grouting Pipe in unit, and Grouting Pipe 4 is the stainless-steel pipe of diameter 10mm, Grouting Pipe 4
Wall mortar joint is embedded to, length of embedment 60mm, is fixed with structure glue.Three-way valve is set between Grouting Pipe 4 and slurry can.
Following ruggedized construction can also be used：A skin deformed bar 1 is arranged in surface of wall, in advance after wall stripping rendering
1 a diameter of 12mm of stress reinforcing bar, 1 spacing of deformed bar are 200mm, and deformed bar 1 arranges non-prestressed reinforcement again above
Muscle 2, deformed bar 1 are welded to connect with reinforcing rib 2,2 a diameter of 12mm of reinforcing rib, and 2 bar spacing of reinforcing rib is
200mm.Just arranged direction is level to deformed bar 1, and 2 arranged direction of reinforcing rib to be vertically arranged, just arrange by deformed bar 1
For Fig. 2 dotted line positions, deformed bar 1 becomes solid line position after tensioning.By prestress steel after 1 tensioning of deformed bar
Muscle 1 is fixed by fixing muscle 3, and fixing muscle 3 is welded and fixed with deformed bar 1, and fixing muscle 3 a diameter of 14~
16mm.3 spacing of fixing muscle is 400mm, and each tensioned unit length is 400mm, sets and strengthens in two terminations of tensioned unit
Muscle 2, row's reinforcing rib 2 is arranged between termination vertical strengthening ribs 2 and vertical fixing muscle 3.Deformed bar 1 adds with non-prestressed
Arrangement Grouting Pipe 4 in the tensioned unit that strengthening tendons 2 is formed, 4 spacing of Grouting Pipe are 400mm, and Grouting Pipe 4 is the stainless steel of diameter 10mm
Steel pipe, Grouting Pipe 4 are embedded to wall mortar joint, and length of embedment 60mm, is fixed with structure glue.Between Grouting Pipe 4 and slurry can
Three-way valve is set.
Wall reinforcement construction procedure is using as follows：
(1) rendering layer is peeled off, the embedded hole of preboring Grouting Pipe 4, the embedded bore dia of Grouting Pipe 4 is 12mm；Preboring is buried
Hole uses electronic rotation diamond core drill, is water-cooled drill bit and is considered to be worth doing with brick output；Using the dust of steel wire cleaning surface of wall
And scum silica frost or loose position and keep drying；
(2) deformed bar 1 is hung, deformed bar 1 is fixed on by wall, U-iron button insertion wall by U-iron button
Mortar joint；
(3) reinforcing rib 2 is hung on deformed bar 1, is carried out deformed bar 1 and reinforcing rib 2 tentatively with steel wire
Connection；
(4) prestressed stretch-draw is carried out to deformed bar 1,1 tensioning of deformed bar uses lever type clamping instrument, lever
The resistance arm of formula clamping tool and the ratio of power arm are 0.05~0.15.Tensioning process is using as follows：By at the beginning of deformed bar 1
Tensioning is stretched to 10% control tension stress, holds lotus 3min and establishes primary stress, then is stretched to control tension stress, holds lotus
5min establishes prestressing force.
(5) deformed bar 1 is subjected to welding grappling with fixing muscle 3 after prestressed stretch-draw, by deformed bar 1 with
Reinforcing rib 2 is welded and fixed；
(6) Grouting Pipe 4 is buried, Grouting Pipe 4 and the gap in embedded hole are closed using structure glue；
(7) slip casting is carried out to wall；With slip casing by pressure machinery slurries injection wall body, slip casting since being put most lower ranking, by
Step develops to both sides upwards and symmetrically, reaches expecting pressure or slurries in neighbouring injection point free flow in each injection point
Go out, injection can terminate, injection hole plug.
If slurries have leakage, leakage channel is such as can not find, slurries incorporation accelerator is continued a small amount of injections makes leakage
Passage gradually precipitates blocking.
After slurries solidification completely, remove Grouting Pipe 4 and carry out sealing of hole.
If wall has crack, following handle is carried out before step (7)：
1) grout nipple is buried in the middle part of crack, perfusion point spacing is integrated according to fracture width and the penetration of fracture to be determined, spacing
For 200~300mm；
2) dead-end fracture, grout nipple are closed after burying using epoxy mortar, form a confined space, reserve slurries disengaging
Mouthful, then slurries are pressed into gap with syringe, fill it.
3) leakage check, applies one layer of soap along crack, is passed through compressed air from grout nipple, air leak position is repaired sealing
Untill not leaking.
4) it is in the milk, when fracture width is less than 0.3mm, after epoxy mortar dead-end fracture, then using methacrylic acid
Lipid slurry filling；When fracture width is greater than or equal to 0.3mm and is less than 1mm, using epoxy resin slurry filling；When splitting
When slit width degree is greater than or equal to 1mm, irrigated using cement grout.
Concrete beam strengthening is taken as follows：Apply upward prestressing force at the 1/3 of beams of concrete and 2/3 can significantly alleviate
The maximal bending moment of beams of concrete, so angle steel 5 is bent at 1/3 and 2/3 in the present invention, 5 bending place of angle steel cuts out triangle and lacks
Mouthful, triangular gap back side welding steel 7 is strengthened, and 7 weld width of welding steel is 180mm, and 7 thickness of steel plate is 12mm.
5 bending place of angle steel sets fastening screw 6, and 6 a diameter of 20mm of fastening screw, nut is highly 40mm.Beams of concrete following two
Corner is evenly distributed with angle setting steel 5, and since moment of flexure is larger in the middle part of beams of concrete, batten plate 8,8 thickness of batten plate are welded between two corner angle steel 5
For 10mm, 8 width of batten plate is 100mm.
Beams of concrete construction procedure is using as follows：
(1) temporary support is provided below in beams of concrete；
(2) the brick wall 280mm of supporting beams of concrete is cut, for the construction indwelling of angle steel 5 operating space；
(3) inserted angle steel 5 after beams of concrete removing surface；
(4) fastening screw 6 is installed, diagonal steel 5 carries out prestressed stretch-draw；
(5) welding steel 7 and batten plate 8.
Embodiment two
The present embodiment uses following ruggedized construction：After wall stripping rendering a skin deformed bar 1 is arranged in surface of wall,
1 a diameter of 12mm of deformed bar, 1 spacing of deformed bar are 200mm, and deformed bar 1 arranges non-prestressed add again above
Strengthening tendons 2, deformed bar 1 are welded to connect with reinforcing rib 2,2 a diameter of 12mm of reinforcing rib, and 2 bar spacing of reinforcing rib is
200mm.Just arranged direction is level to deformed bar 1, and 2 arranged direction of reinforcing rib to be vertically arranged, just arrange by deformed bar 1
For Fig. 2 dotted line positions, deformed bar 1 becomes solid line position after tensioning.By prestress steel after 1 tensioning of deformed bar
Muscle 1 is fixed by fixing muscle 3, and fixing muscle 3 is welded and fixed with deformed bar 1, and fixing muscle 3 a diameter of 14~
16mm.3 spacing of fixing muscle is 400mm, and each tensioned unit length is 400mm, sets and strengthens in two terminations of tensioned unit
Muscle 2, row's reinforcing rib 2 is arranged between termination vertical strengthening ribs 2 and vertical fixing muscle 3.Deformed bar 1 adds with non-prestressed
Arrangement Grouting Pipe 4 in the tensioned unit that strengthening tendons 2 is formed, 4 spacing of Grouting Pipe are 400mm, and Grouting Pipe 4 is the stainless steel of diameter 10mm
Steel pipe, Grouting Pipe 4 are embedded to wall mortar joint, and length of embedment 60mm, is fixed with structure glue.Between Grouting Pipe 4 and slurry can
Three-way valve is set.
Wall reinforcement construction procedure is using as follows：
(1) rendering layer is peeled off, the embedded hole of preboring Grouting Pipe 4, the embedded bore dia of Grouting Pipe 4 is 12mm；Preboring is buried
Hole uses electronic rotation diamond core drill, is water-cooled drill bit and is considered to be worth doing with brick output；Using the dust of steel wire cleaning surface of wall
And scum silica frost or loose position and keep drying；
(2) deformed bar 1 is hung, deformed bar 1 is fixed on by wall, U-iron button insertion wall by U-iron button
Mortar joint；
(3) reinforcing rib 2 is hung on deformed bar 1, is carried out deformed bar 1 and reinforcing rib 2 tentatively with steel wire
Connection；
(4) prestressed stretch-draw is carried out to deformed bar 1,1 tensioning of deformed bar uses lever type clamping instrument, lever
The resistance arm of formula clamping tool and the ratio of power arm are 0.05~0.15.Tensioning process is using as follows：By at the beginning of deformed bar 1
Tensioning is stretched to 10% control tension stress, holds lotus 3min and establishes primary stress, then is stretched to control tension stress, holds lotus
5min establishes prestressing force.
(5) deformed bar 1 is subjected to welding grappling with fixing muscle 3 after prestressed stretch-draw, by deformed bar 1 with
Reinforcing rib 2 is welded and fixed；
(6) Grouting Pipe 4 is buried, Grouting Pipe 4 and the gap in embedded hole are closed using structure glue；
(7) slip casting is carried out to wall；With slip casing by pressure machinery slurries injection wall body, slip casting since being put most lower ranking, by
Step develops to both sides upwards and symmetrically, reaches expecting pressure or slurries in neighbouring injection point free flow in each injection point
Go out, injection can terminate, injection hole plug.
If slurries have leakage, leakage channel is such as can not find, slurries incorporation accelerator is continued a small amount of injections makes leakage
Passage gradually precipitates blocking.
After slurries solidification completely, remove Grouting Pipe 4 and carry out sealing of hole.
If wall has crack, following handle is carried out before step (7)：
1) grout nipple is buried in the middle part of crack, perfusion point spacing is integrated according to fracture width and the penetration of fracture to be determined, spacing
For 200~300mm；
2) dead-end fracture, grout nipple are closed after burying using epoxy mortar, form a confined space, reserve slurries disengaging
Mouthful, then slurries are pressed into gap with syringe, fill it.
3) leakage check, applies one layer of soap along crack, is passed through compressed air from grout nipple, air leak position is repaired sealing
Untill not leaking.
4) it is in the milk, when fracture width is less than 0.3mm, after epoxy mortar dead-end fracture, then using methacrylic acid
Lipid slurry filling；When fracture width is greater than or equal to 0.3mm and is less than 1mm, using epoxy resin slurry filling；When splitting
When slit width degree is greater than or equal to 1mm, irrigated using cement grout.
Concrete beam strengthening is taken as follows：Apply upward prestressing force at the 1/3 of beams of concrete and 2/3 can significantly alleviate
The maximal bending moment of beams of concrete, so angle steel 5 is bent at 1/3 and 2/3 in the present invention, 5 bending place of angle steel cuts out triangle and lacks
Mouthful, triangular gap back side welding steel 7 is strengthened, and 7 weld width of welding steel is 180mm, and 7 thickness of steel plate is 12mm.
5 bending place of angle steel sets fastening screw 6, and 6 a diameter of 20mm of fastening screw, nut is highly 40mm.Beams of concrete following two
Corner is evenly distributed with angle setting steel 5, batten plate 8 is welded between left comer portion angle steel 5 and right corner portion angle steel 5,8 thickness of batten plate is 10mm, and batten plate 8 is wide
Spend for 100mm.
Beams of concrete construction procedure is using as follows：
(1) temporary support is provided below in beams of concrete；
(2) the brick wall 280mm of supporting beams of concrete is cut, for the construction indwelling of angle steel 5 operating space；
(3) inserted angle steel 5 after beams of concrete removing surface；
(4) fastening screw 6 is installed, diagonal steel 5 carries out prestressed stretch-draw；
(5) welding steel 7 and batten plate 8.
Claims (1)
1. it is a kind of lifted old building load-carrying properties structure, it is characterized in that wall reinforcement take it is as follows：After wall peels off rendering
Arrange a skin deformed bar in surface of wall, a diameter of 12~14mm of deformed bar, deformed bar spacing for 150~
300mm, arranges non-prestressed reinforcing rib above deformed bar again, and deformed bar is welded to connect with reinforcing rib, strengthens
A diameter of 12~the 14mm of muscle, reinforcing rib bar spacing are 150~300mm；By deformed bar after deformed bar tensioning
It is fixed by fixing muscle, fixing muscle is welded and fixed with deformed bar, a diameter of 14~16mm of fixing muscle；Prestressing force
Arrangement Grouting Pipe in the tensioned unit that reinforcing bar and non-prestressed reinforcing rib are formed, slip casting tube spacing are 350~450mm, Grouting Pipe
For the stainless-steel pipe of diameter 10mm, Grouting Pipe embedment wall mortar joint, length of embedment 60mm, is fixed with structure glue；Note
Three-way valve is set between slurry pipe and slurry can；
Just arranged direction and horizontal sextant angle are 45 degree to deformed bar, reinforcing rib arranged direction and the first arranged direction of deformed bar
Vertically；Fixing muscle spacing is 150~300mm, and each tensioned unit length is 150~300mm, in two terminations of tensioned unit
Reinforcing rib is set；
Concrete beam strengthening is taken as follows：Angle steel is bent at 1/3 and 2/3, and angle steel bending place cuts out triangular gap, triangle
Notch back side welding steel is strengthened, and welding steel weld width is 150~200mm, and steel plate thickness is 12~14mm；Angle steel
Bending place sets fastening screw, a diameter of 18~22mm of fastening screw, and nut is highly more than 1.5 times of screw diameter；Concrete
Beam following two corner is evenly distributed with angle setting steel, welds batten plate between left comer portion angle steel and right corner portion angle steel, batten plate thickness for 10~
12mm, batten plate width are 100~120mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN201711245741.6A Active CN107905551B (en) | 2016-05-21 | 2016-05-21 | Construction method for wall reinforcing structure |
| CN201810184634.5A Active CN108360835B (en) | 2016-05-21 | 2016-05-21 | Construction method for reinforcing structure of old building |
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| CN109577500A (en) * | 2018-12-04 | 2019-04-05 | 富思特新材料科技发展股份有限公司 | A kind of loose insulation board base treatment technique of exterior insulation engineering construction |
| CN110185277A (en) * | 2019-04-19 | 2019-08-30 | 上海市建筑装饰工程集团有限公司 | The restorative procedure of existing building external wall seepage point |
| CN112065000B (en) * | 2020-08-05 | 2021-08-06 | 业之峰诺华家居装饰集团股份有限公司 | Thin tile pasting method layer structure and construction process thereof |
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- 2016-05-21 CN CN201711245677.1A patent/CN107916797B/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| CN107916797B (en) | 2020-05-15 |
| CN107989397B (en) | 2019-03-05 |
| CN107916797A (en) | 2018-04-17 |
| CN107989398B (en) | 2020-05-12 |
| CN107989398A (en) | 2018-05-04 |
| CN107905551B (en) | 2020-02-04 |
| CN106088646B (en) | 2018-07-24 |
| CN108360835B (en) | 2020-02-04 |
| CN106088646A (en) | 2016-11-09 |
| CN107916796B (en) | 2019-03-05 |
| CN107989397A (en) | 2018-05-04 |
| CN108360835A (en) | 2018-08-03 |
| CN107905551A (en) | 2018-04-13 |
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