CN107989398B - Construction method for wall reinforcing structure - Google Patents
Construction method for wall reinforcing structure Download PDFInfo
- Publication number
- CN107989398B CN107989398B CN201711246564.3A CN201711246564A CN107989398B CN 107989398 B CN107989398 B CN 107989398B CN 201711246564 A CN201711246564 A CN 201711246564A CN 107989398 B CN107989398 B CN 107989398B
- Authority
- CN
- China
- Prior art keywords
- prestressed
- grouting
- reinforcement
- reinforcing ribs
- tensioning
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
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 a construction method of a wall reinforcing structure, which is characterized in that the wall reinforcing construction steps are as follows: (1) stripping the plastering layer, and pre-drilling an embedding hole of the grouting pipe; (2) hanging prestressed reinforcements; (3) hanging reinforcing ribs on the prestressed reinforcements; (4) pre-stress tensioning is carried out on the pre-stress steel bars; (5) after the prestressed tension is finished, welding and anchoring the prestressed steel bars by using fixing bars, and welding and fixing the prestressed steel bars and the reinforcing ribs; (6) embedding grouting pipes, wherein gaps between the grouting pipes and the embedding holes are sealed by structural adhesive; (7) and (5) grouting the wall.
Description
Technical Field
The invention relates to a reinforced structure, in particular to a reinforced structure of an old building.
Background
After long-term use of an old building, the bearing capacity of the old building is reduced due to various reasons, which is mainly reflected in that the wall of the old building is cracked due to settlement and other reasons or the bearing capacity of the wall can not meet the requirement of the existing load; the bearing capacity of the concrete beam of the old building can be reduced due to concrete carbonization or can not meet the requirement due to the use standard lifting. Therefore, for old buildings, the overall bearing effect of the structure needs to be enhanced, and the mechanical property of the structure needs to be improved.
Disclosure of Invention
The invention provides a reinforcing structure of an old building, which solves the problem that the bearing capacity of a wall body and the bearing capacity of a concrete beam are not enough.
Aiming at the problem of insufficient wall strength, the invention adopts the following reinforced structure: a piece of prestressed reinforcement is arranged on the surface of a wall body after the wall body is stripped and painted, the diameter of the prestressed reinforcement is 12-14 mm, the distance between the prestressed reinforcements is 150-300 mm, non-prestressed reinforcing ribs are arranged on the prestressed reinforcement, the prestressed reinforcement and the reinforcing ribs are in welded connection, the diameter of each reinforcing rib is 12-14 mm, and the distance between the reinforcing ribs and the reinforcing ribs is 150-300 mm. The initial arrangement direction of the prestressed reinforcements is 45 degrees from the horizontal included angle, and the arrangement direction of the reinforcing ribs is perpendicular to the initial arrangement direction of the prestressed reinforcements. And after the prestressed reinforcement is tensioned, fixing the prestressed reinforcement through a fixing reinforcement, and welding and fixing the fixing reinforcement and the prestressed reinforcement, wherein the diameter of the fixing reinforcement is 14-16 mm. The fixed rib interval is 150 ~ 300mm, and every stretch-draw unit length is 150 ~ 300mm, sets up the strengthening rib at two ends of stretch-draw unit. Grouting pipes are arranged in a tensioning unit formed by the prestressed reinforcements and the non-prestressed reinforcing ribs, the distance between the grouting pipes is 350-450 mm, the grouting pipes are stainless steel pipes with the diameter of 10mm, the grouting pipes are embedded into mortar joints of the wall body, the embedding depth is 60mm, and the grouting pipes are fixed by structural glue. A three-way valve is arranged between the grouting pipe and the slurry storage tank.
The following reinforcing structures may also be employed: a piece of prestressed reinforcement is arranged on the surface of a wall body after the wall body is stripped and painted, the diameter of the prestressed reinforcement is 12-14 mm, the distance between the prestressed reinforcements is 150-300 mm, non-prestressed reinforcing ribs are arranged on the prestressed reinforcement, the prestressed reinforcement and the reinforcing ribs are in welded connection, the diameter of each reinforcing rib is 12-14 mm, and the distance between the reinforcing ribs and the reinforcing ribs is 150-300 mm. The initial arrangement direction of the prestressed reinforcements is horizontal, and the arrangement direction of the reinforcing ribs is vertical. And after the prestressed reinforcement is tensioned, fixing the prestressed reinforcement through a fixing reinforcement, and welding and fixing the fixing reinforcement and the prestressed reinforcement, wherein the diameter of the fixing reinforcement is 14-16 mm. The fixed muscle interval is 300 ~ 600mm, and every stretch-draw unit length is 300 ~ 600mm, sets up the strengthening rib at two ends of stretch-draw unit, arranges one row of strengthening rib between vertical strengthening rib of end and vertical fixed muscle. Grouting pipes are arranged in a tensioning unit formed by the prestressed reinforcements and the non-prestressed reinforcing ribs, the distance between the grouting pipes is 350-450 mm, the grouting pipes are stainless steel pipes with the diameter of 10mm, the grouting pipes are embedded into mortar joints of the wall body, the embedding depth is 60mm, and the grouting pipes are fixed by structural glue. A three-way valve is arranged between the grouting pipe and the slurry storage tank.
After the prestressed reinforcement is arranged on the surface of the wall body, the structural performance of the wall body is greatly improved, even the damage form of the structure is also greatly improved, the plastic damage is transited to the elastic damage, and the structure safety is remarkably improved.
The wall body reinforcing construction steps are as follows:
(1) stripping the whitewash layer, and pre-drilling an embedding hole of the grouting pipe, wherein the diameter of the embedding hole of the grouting pipe is 12 mm; pre-drilling an embedding hole by using an electric rotary diamond core drill, cooling a drill bit by using water and taking out brick scraps; cleaning dust and scum or loose parts on the surface of a wall body by using steel wires and keeping the dust and scum or loose parts dry;
(2) hanging prestressed reinforcements, fixing the prestressed reinforcements on the wall body through a U-shaped iron buckle, and inserting the U-shaped iron buckle into the mortar joint of the wall body;
(3) hanging reinforcing ribs on the prestressed reinforcements, and primarily connecting the prestressed reinforcements with the reinforcing ribs by using steel wires;
(4) and (3) carrying out prestress tensioning on the prestressed reinforcement, wherein a lever-type clamping tool is adopted for prestressed reinforcement tensioning, and the ratio of a resistance arm to a power arm of the lever-type clamping tool is 0.05-0.15. The tensioning process adopts the following steps: and (3) primarily tensioning the prestressed reinforcement to 10% of controlled tensioning stress, holding the load for 3min to establish the initial stress, tensioning the prestressed reinforcement to the controlled tensioning stress, and holding the load for 5min to establish the prestress.
(5) After the prestressed tension is finished, welding and anchoring the prestressed steel bars by using fixing bars, and welding and fixing the prestressed steel bars and the reinforcing ribs;
(6) embedding grouting pipes, wherein gaps between the grouting pipes and the embedding holes are sealed by structural adhesive;
(7) grouting the wall; and (3) grouting the wall by using a pressure grouting machine, wherein grouting is started from the lowest row position, gradually and symmetrically develops towards two sides, the expected pressure is reached at each injection point or the grout freely flows out from the adjacent injection points, the injection direction can be stopped, and the injection hole is blocked.
If the slurry leaks, if no leak path can be found, the slurry is mixed into the accelerator and injected in a small amount to gradually precipitate and block the leak path.
And (4) after the slurry is completely solidified, removing the grouting pipe and sealing the hole.
If the wall body has cracks, the following treatment is carried out before the step (7):
1) embedding grouting nozzles in the middle of the cracks, wherein the distance between grouting points is comprehensively determined according to the width and the depth of the cracks, and the distance is 200-300 mm;
2) and sealing the crack, sealing the grouting nozzle by using epoxy cement after the grouting nozzle is embedded to form a sealed space, reserving a grout inlet and a grout outlet, and pressing the grout into the crack by using a needle cylinder to fill the crack.
3) And (4) sealing inspection, coating a layer of soap along the crack, introducing compressed air from the grouting nozzle, and repairing and sealing the air leakage part until the leakage is avoided.
4) Grouting, namely when the width of the crack is less than 0.3mm, sealing the crack by adopting epoxy daub, and then grouting by adopting methacrylate grout; when the width of the crack is more than or equal to 0.3mm and less than 1mm, adopting epoxy resin grout for pouring; and when the width of the crack is larger than or equal to 1mm, pouring by using cement grout.
According to the stress characteristics of the concrete beam, the concrete beam is reinforced as follows: the concrete beam has the advantages that the maximum bending moment of the concrete beam can be greatly relieved by applying upward prestress on 1/3 and 2/3 positions of the concrete beam, so that the angle steel is bent at 1/3 and 2/3 positions, triangular notches are cut at the bent positions of the angle steel, steel plates are welded on the back sides of the triangular notches for reinforcement, the welding width of the welded steel plates is 150-200 mm, and the thickness of the steel plates is 12-14 mm. The angle steel bending part is provided with a fastening screw rod, the diameter of the fastening screw rod is 18-22 mm, and the height of a screw cap is larger than 1.5 times of the diameter of the screw rod. The angle steel is evenly arranged at two corners below the concrete beam, a batten plate is welded between the angle steel at the left corner and the angle steel at the right corner, the thickness of the batten plate is 10-12 mm, and the width of the batten plate is 100-120 mm.
The concrete beam construction steps are as follows:
(1) arranging a temporary support below the concrete beam;
(2) chiseling 250-300 mm of brick walls for supporting concrete beams, and reserving an operation space for angle steel construction;
(3) inserting angle steel after cleaning the surface of the concrete beam;
(4) mounting a fastening screw, and performing prestress tensioning on the angle steel;
(5) and welding the steel plate and the batten plate.
The invention has good structural performance and is safe and reliable.
Drawings
Fig. 1 is a schematic view of a wall reinforcing structure, fig. 2 is a schematic view of a wall reinforcing structure, fig. 3 is a schematic view of a structure before concrete reinforcement, and fig. 4 is a schematic view of a concrete reinforcing structure.
In the drawings: 1. prestressed reinforcement, 2, strengthening rib, 3, fixed muscle, 4, slip casting pipe, 5, angle steel, 6, fastening screw, 7, steel sheet, 8, lacing plate.
Detailed Description
Example one
The embodiment is not enough to wall body intensity, takes following reinforced structure: a skin prestressed reinforcement 1 is arranged on the surface of a wall body after the wall body is stripped and painted, the diameter of the prestressed reinforcement 1 is 12mm, the distance between the prestressed reinforcements 1 is 200mm, non-prestressed reinforcing ribs 2 are arranged on the prestressed reinforcement 1, the prestressed reinforcement 1 and the reinforcing ribs 2 are welded and connected, the diameter of the reinforcing ribs 2 is 12mm, and the distance between the reinforcing ribs 2 is 200 mm. The initial arrangement direction of the prestressed reinforcement 1 is 45 degrees from the horizontal included angle, the arrangement direction of the reinforcing ribs 2 is perpendicular to the initial arrangement direction of the prestressed reinforcement 1, the initial arrangement of the prestressed reinforcement 1 is in the position of a dotted line in the figure 1, and the prestressed reinforcement 1 is stretched to become the position of a solid line. After the prestressed reinforcement 1 is tensioned, the prestressed reinforcement 1 is fixed through the fixing ribs 3, the fixing ribs 3 and the prestressed reinforcement 1 are welded and fixed, and the diameter of the fixing ribs 3 is 14 mm. The distance between the fixed ribs 3 is 200mm, the length of each tensioning unit is 200mm, and reinforcing ribs 2 are arranged at two ends of each tensioning unit. Grouting pipes 4 are arranged in a tensioning unit formed by the prestressed reinforcement 1 and the non-prestressed reinforcing ribs 2, the distance between the grouting pipes 4 is 400mm, the grouting pipes 4 are stainless steel pipes with the diameter of 10mm, the grouting pipes 4 are embedded into wall mortar joints, the embedding depth is 60mm, and the grouting pipes are fixed by structural glue. A three-way valve is arranged between the grouting pipe 4 and the slurry storage tank.
The following reinforcing structures may also be employed: a skin prestressed reinforcement 1 is arranged on the surface of a wall body after the wall body is stripped and painted, the diameter of the prestressed reinforcement 1 is 12mm, the distance between the prestressed reinforcements 1 is 200mm, non-prestressed reinforcing ribs 2 are arranged on the prestressed reinforcement 1, the prestressed reinforcement 1 and the reinforcing ribs 2 are welded and connected, the diameter of the reinforcing ribs 2 is 12mm, and the distance between the reinforcing ribs 2 is 200 mm. The initial arrangement direction of the prestressed reinforcement 1 is horizontal, the arrangement direction of the reinforcing ribs 2 is vertical, the initial arrangement of the prestressed reinforcement 1 is the position of the dotted line in fig. 2, and the prestressed reinforcement 1 is stretched to become the position of the solid line. After the prestressed reinforcement 1 is tensioned, the prestressed reinforcement 1 is fixed through the fixing ribs 3, the fixing ribs 3 and the prestressed reinforcement 1 are welded and fixed, and the diameter of the fixing ribs 3 is 14-16 mm. The interval of the fixed ribs 3 is 400mm, the length of each tensioning unit is 400mm, the two ends of each tensioning unit are provided with reinforcing ribs 2, and a row of reinforcing ribs 2 are arranged between the vertical reinforcing ribs 2 and the vertical fixed ribs 3 at the ends. Grouting pipes 4 are arranged in a tensioning unit formed by the prestressed reinforcement 1 and the non-prestressed reinforcing ribs 2, the distance between the grouting pipes 4 is 400mm, the grouting pipes 4 are stainless steel pipes with the diameter of 10mm, the grouting pipes 4 are embedded into wall mortar joints, the embedding depth is 60mm, and the grouting pipes are fixed by structural glue. A three-way valve is arranged between the grouting pipe 4 and the slurry storage tank.
The wall body reinforcing construction steps are as follows:
(1) stripping the whitewash layer, and pre-drilling an embedding hole of the grouting pipe 4, wherein the diameter of the embedding hole of the grouting pipe 4 is 12 mm; pre-drilling an embedding hole by using an electric rotary diamond core drill, cooling a drill bit by using water and taking out brick scraps; cleaning dust and scum or loose parts on the surface of a wall body by using steel wires and keeping the dust and scum or loose parts dry;
(2) hanging prestressed reinforcements 1, fixing the prestressed reinforcements 1 on the wall body through U-shaped iron buckles, and inserting the U-shaped iron buckles into mortar joints of the wall body;
(3) hanging a reinforcing rib 2 on the prestressed reinforcement 1, and primarily connecting the prestressed reinforcement 1 with the reinforcing rib 2 by using a steel wire;
(4) and (3) carrying out prestress tensioning on the prestressed reinforcement 1, wherein a lever type clamping tool is adopted for tensioning the prestressed reinforcement 1, and the ratio of a resistance arm to a power arm of the lever type clamping tool is 0.05-0.15. The tensioning process adopts the following steps: and (3) primarily tensioning the prestressed reinforcement 1 to a controlled tensioning stress of 10%, holding the load for 3min to establish the initial stress, then tensioning to the controlled tensioning stress, and holding the load for 5min to establish the prestress.
(5) After the pre-stress tensioning is finished, welding and anchoring the pre-stress steel bar 1 by using a fixing bar 3, and welding and fixing the pre-stress steel bar 1 and a reinforcing bar 2;
(6) embedding a grouting pipe 4, wherein a gap between the grouting pipe 4 and the embedding hole is sealed by structural adhesive;
(7) grouting the wall; and (3) grouting the wall by using a pressure grouting machine, wherein grouting is started from the lowest row position, gradually and symmetrically develops towards two sides, the expected pressure is reached at each injection point or the grout freely flows out from the adjacent injection points, the injection direction can be stopped, and the injection hole is blocked.
If the slurry leaks, if no leak path can be found, the slurry is mixed into the accelerator and injected in a small amount to gradually precipitate and block the leak path.
And (5) after the slurry is completely solidified, removing the grouting pipe 4 and sealing the hole.
If the wall body has cracks, the following treatment is carried out before the step (7):
1) embedding grouting nozzles in the middle of the cracks, wherein the distance between grouting points is comprehensively determined according to the width and the depth of the cracks, and the distance is 200-300 mm;
2) and sealing the crack, sealing the grouting nozzle by using epoxy cement after the grouting nozzle is embedded to form a sealed space, reserving a grout inlet and a grout outlet, and pressing the grout into the crack by using a needle cylinder to fill the crack.
3) And (4) sealing inspection, coating a layer of soap along the crack, introducing compressed air from the grouting nozzle, and repairing and sealing the air leakage part until the leakage is avoided.
4) Grouting, namely when the width of the crack is less than 0.3mm, sealing the crack by adopting epoxy daub, and then grouting by adopting methacrylate grout; when the width of the crack is more than or equal to 0.3mm and less than 1mm, adopting epoxy resin grout for pouring; and when the width of the crack is larger than or equal to 1mm, pouring by using cement grout.
The concrete beam reinforcement adopts the following steps: the maximum bending moment of the concrete beam can be greatly relieved by applying upward prestress on 1/3 and 2/3 positions of the concrete beam, so that the angle steel 5 is bent at 1/3 and 2/3 positions, triangular notches are cut at the bent positions of the angle steel 5, a steel plate 7 is welded on the back of each triangular notch for reinforcement, the welding width of the welded steel plate 7 is 180mm, and the thickness of the steel plate 7 is 12 mm. The angle steel 5 bending part sets up fastening screw 6, and fastening screw 6 diameter is 20mm, and the nut height is 40 mm. The angle steel 5 is all arranged at two bights below the concrete beam, because concrete beam middle part moment of flexure is great, welds batten 8 between two bight angle steels 5, and batten 8 thickness is 10mm, and batten 8 width is 100 mm.
The concrete beam construction steps are as follows:
(1) arranging a temporary support below the concrete beam;
(2) chiseling 280mm of brick walls for supporting concrete beams, and reserving an operation space for angle steel 5 construction;
(3) the surface of the concrete beam is cleaned and then inserted into the angle steel 5;
(4) mounting a fastening screw 6, and performing prestress tensioning on the angle steel 5;
(5) the steel plate 7 and the gusset plate 8 are welded.
Example two
The present embodiment employs the following reinforcement structure: a skin prestressed reinforcement 1 is arranged on the surface of a wall body after the wall body is stripped and painted, the diameter of the prestressed reinforcement 1 is 12mm, the distance between the prestressed reinforcements 1 is 200mm, non-prestressed reinforcing ribs 2 are arranged on the prestressed reinforcement 1, the prestressed reinforcement 1 and the reinforcing ribs 2 are welded and connected, the diameter of the reinforcing ribs 2 is 12mm, and the distance between the reinforcing ribs 2 is 200 mm. The initial arrangement direction of the prestressed reinforcement 1 is horizontal, the arrangement direction of the reinforcing ribs 2 is vertical, the initial arrangement of the prestressed reinforcement 1 is the position of the dotted line in fig. 2, and the prestressed reinforcement 1 is stretched to become the position of the solid line. After the prestressed reinforcement 1 is tensioned, the prestressed reinforcement 1 is fixed through the fixing ribs 3, the fixing ribs 3 and the prestressed reinforcement 1 are welded and fixed, and the diameter of the fixing ribs 3 is 14-16 mm. The interval of the fixed ribs 3 is 400mm, the length of each tensioning unit is 400mm, the two ends of each tensioning unit are provided with reinforcing ribs 2, and a row of reinforcing ribs 2 are arranged between the vertical reinforcing ribs 2 and the vertical fixed ribs 3 at the ends. Grouting pipes 4 are arranged in a tensioning unit formed by the prestressed reinforcement 1 and the non-prestressed reinforcing ribs 2, the distance between the grouting pipes 4 is 400mm, the grouting pipes 4 are stainless steel pipes with the diameter of 10mm, the grouting pipes 4 are embedded into wall mortar joints, the embedding depth is 60mm, and the grouting pipes are fixed by structural glue. A three-way valve is arranged between the grouting pipe 4 and the slurry storage tank.
The wall body reinforcing construction steps are as follows:
(1) stripping the whitewash layer, and pre-drilling an embedding hole of the grouting pipe 4, wherein the diameter of the embedding hole of the grouting pipe 4 is 12 mm; pre-drilling an embedding hole by using an electric rotary diamond core drill, cooling a drill bit by using water and taking out brick scraps; cleaning dust and scum or loose parts on the surface of a wall body by using steel wires and keeping the dust and scum or loose parts dry;
(2) hanging prestressed reinforcements 1, fixing the prestressed reinforcements 1 on the wall body through U-shaped iron buckles, and inserting the U-shaped iron buckles into mortar joints of the wall body;
(3) hanging a reinforcing rib 2 on the prestressed reinforcement 1, and primarily connecting the prestressed reinforcement 1 with the reinforcing rib 2 by using a steel wire;
(4) and (3) carrying out prestress tensioning on the prestressed reinforcement 1, wherein a lever type clamping tool is adopted for tensioning the prestressed reinforcement 1, and the ratio of a resistance arm to a power arm of the lever type clamping tool is 0.05-0.15. The tensioning process adopts the following steps: and (3) primarily tensioning the prestressed reinforcement 1 to a controlled tensioning stress of 10%, holding the load for 3min to establish the initial stress, then tensioning to the controlled tensioning stress, and holding the load for 5min to establish the prestress.
(5) After the pre-stress tensioning is finished, welding and anchoring the pre-stress steel bar 1 by using a fixing bar 3, and welding and fixing the pre-stress steel bar 1 and a reinforcing bar 2;
(6) embedding a grouting pipe 4, wherein a gap between the grouting pipe 4 and the embedding hole is sealed by structural adhesive;
(7) grouting the wall; and (3) grouting the wall by using a pressure grouting machine, wherein grouting is started from the lowest row position, gradually and symmetrically develops towards two sides, the expected pressure is reached at each injection point or the grout freely flows out from the adjacent injection points, the injection direction can be stopped, and the injection hole is blocked.
If the slurry leaks, if no leak path can be found, the slurry is mixed into the accelerator and injected in a small amount to gradually precipitate and block the leak path.
And (5) after the slurry is completely solidified, removing the grouting pipe 4 and sealing the hole.
If the wall body has cracks, the following treatment is carried out before the step (7):
1) embedding grouting nozzles in the middle of the cracks, wherein the distance between grouting points is comprehensively determined according to the width and the depth of the cracks, and the distance is 200-300 mm;
2) and sealing the crack, sealing the grouting nozzle by using epoxy cement after the grouting nozzle is embedded to form a sealed space, reserving a grout inlet and a grout outlet, and pressing the grout into the crack by using a needle cylinder to fill the crack.
3) And (4) sealing inspection, coating a layer of soap along the crack, introducing compressed air from the grouting nozzle, and repairing and sealing the air leakage part until the leakage is avoided.
4) Grouting, namely when the width of the crack is less than 0.3mm, sealing the crack by adopting epoxy daub, and then grouting by adopting methacrylate grout; when the width of the crack is more than or equal to 0.3mm and less than 1mm, adopting epoxy resin grout for pouring; and when the width of the crack is larger than or equal to 1mm, pouring by using cement grout.
The concrete beam reinforcement adopts the following steps: the maximum bending moment of the concrete beam can be greatly relieved by applying upward prestress on 1/3 and 2/3 positions of the concrete beam, so that the angle steel 5 is bent at 1/3 and 2/3 positions, triangular notches are cut at the bent positions of the angle steel 5, a steel plate 7 is welded on the back of each triangular notch for reinforcement, the welding width of the welded steel plate 7 is 180mm, and the thickness of the steel plate 7 is 12 mm. The angle steel 5 bending part sets up fastening screw 6, and fastening screw 6 diameter is 20mm, and the nut height is 40 mm. Angle steel 5 is all arranged at two bights below the concrete beam, welds batten plate 8 between left bight angle steel 5 and the right bight angle steel 5, and batten plate 8 thickness is 10mm, and batten plate 8 width is 100 mm.
The concrete beam construction steps are as follows:
(1) arranging a temporary support below the concrete beam;
(2) chiseling 280mm of brick walls for supporting concrete beams, and reserving an operation space for angle steel 5 construction;
(3) the surface of the concrete beam is cleaned and then inserted into the angle steel 5;
(4) mounting a fastening screw 6, and performing prestress tensioning on the angle steel 5;
(5) the steel plate 7 and the gusset plate 8 are welded.
Claims (1)
1. A construction method for a wall reinforcing structure is characterized in that the wall reinforcing method comprises the following steps: after the wall body is stripped and painted, arranging a piece of prestressed reinforcement on the surface of the wall body, wherein the diameter of the prestressed reinforcement is 12-14 mm, the space between the prestressed reinforcements is 150-300 mm, arranging non-prestressed reinforcing ribs on the prestressed reinforcement, welding and connecting the prestressed reinforcement and the non-prestressed reinforcing ribs, and the diameter of the non-prestressed reinforcing ribs is 12-14 mm, and the space between the non-prestressed reinforcing ribs is 150-300 mm; the initial arrangement direction of the prestressed reinforcing steel bars is horizontal, and the arrangement direction of the non-prestressed reinforcing steel bars is vertical; after the prestressed reinforcement is tensioned, fixing the prestressed reinforcement through a fixing reinforcement, and welding and fixing the fixing reinforcement and the prestressed reinforcement, wherein the diameter of the fixing reinforcement is 14-16 mm; the distance between the fixed ribs is 300-600 mm, the length of each tensioning unit is 300-600 mm, non-prestressed reinforcing ribs are arranged at two ends of each tensioning unit, and a row of non-prestressed reinforcing ribs are arranged between the vertical non-prestressed reinforcing ribs at the ends and the vertical fixed ribs; grouting pipes are arranged in a tensioning unit formed by the prestressed reinforcements and the non-prestressed reinforcing ribs, the distance between the grouting pipes is 350-450 mm, the grouting pipes are stainless steel pipes with the diameter of 10mm, the grouting pipes are embedded into mortar joints of a wall body, the embedding depth is 60mm, and the grouting pipes are fixed by structural glue; a three-way valve is arranged between the grouting pipe and the slurry storage tank;
the concrete beam reinforcement adopts the following steps: the angle steel is bent at 1/3 and 2/3 positions, triangular notches are cut at the bent positions of the angle steel, steel plates are welded on the back sides of the triangular notches for reinforcement, the welding width of the welded steel plates is 150-200 mm, and the thickness of the steel plates is 12-14 mm; a fastening screw is arranged at the bent part of the angle steel, the diameter of the fastening screw is 18-22 mm, and the height of a screw cap is 1.5 times larger than the diameter of the screw; angle steels are uniformly arranged at two corners below the concrete beam, a batten plate is welded between the angle steel at the left corner and the angle steel at the right corner, the thickness of the batten plate is 10-12 mm, and the width of the batten plate is 100-120 mm;
the wall body reinforcing construction steps are as follows:
(1) stripping the whitewash layer, and pre-drilling an embedding hole of the grouting pipe, wherein the diameter of the embedding hole of the grouting pipe is 12 mm; pre-drilling an embedding hole by using an electric rotary diamond core drill, cooling a drill bit by using water and taking out brick scraps; cleaning dust and scum or loose parts on the surface of a wall body by using steel wires and keeping the dust and scum or loose parts dry;
(2) hanging prestressed reinforcements, fixing the prestressed reinforcements on the wall body through a U-shaped iron buckle, and inserting the U-shaped iron buckle into the mortar joint of the wall body;
(3) hanging non-prestressed reinforcing ribs on the prestressed reinforcements, and primarily connecting the prestressed reinforcements with the non-prestressed reinforcing ribs by using steel wires;
(4) prestressed tensioning is carried out on the prestressed reinforcement, a lever type clamping tool is adopted for tensioning the prestressed reinforcement, and the ratio of a resistance arm to a power arm of the lever type clamping tool is 0.05-0.15; the tensioning process adopts the following steps: primarily tensioning the prestressed reinforcement to 10% of controlled tensioning stress, holding the load for 3min to establish initial stress, then tensioning to the controlled tensioning stress, and holding the load for 5min to establish prestress;
(5) after the pre-stressed tension is finished, welding and anchoring the pre-stressed steel bars by using fixing bars, and welding and fixing the pre-stressed steel bars and the non-pre-stressed reinforcing bars;
(6) embedding grouting pipes, wherein gaps between the grouting pipes and the embedding holes are sealed by structural adhesive;
(7) grouting the wall; injecting grout into the wall by using a pressure grouting machine, wherein the grouting gradually and upwards and symmetrically develops towards two sides from the lowest row position, and when each injection point reaches the expected pressure or the grout freely flows out from the adjacent injection points, the injection direction can be stopped, and the injection holes are blocked;
if the slurry has leakage, if the leakage channel can not be found, the slurry is mixed with the accelerator for continuous small-amount injection so that the leakage channel is gradually precipitated and blocked;
after the slurry is completely solidified, removing the grouting pipe and sealing holes;
if the wall body has cracks, the following treatment is carried out before the step (7):
1) embedding grouting nozzles in the middle of the cracks, wherein the distance between grouting points is comprehensively determined according to the width and the depth of the cracks, and the distance is 200-300 mm;
2) sealing the crack, sealing the grouting nozzle by using epoxy cement after embedding to form a sealed space, reserving a grout inlet and a grout outlet, and pressing the grout into the crack by using a needle cylinder to fill the crack;
3) sealing inspection, coating a layer of soap along the crack, introducing compressed air from the grouting nozzle, and repairing and sealing the air leakage part until the leakage does not occur;
4) grouting, namely when the width of the crack is less than 0.3mm, sealing the crack by adopting epoxy daub, and then grouting by adopting methacrylate grout; when the width of the crack is more than or equal to 0.3mm and less than 1mm, adopting epoxy resin grout for pouring; and when the width of the crack is larger than or equal to 1mm, pouring by using cement grout.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711246564.3A CN107989398B (en) | 2016-05-21 | 2016-05-21 | Construction method for wall reinforcing structure |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711246564.3A CN107989398B (en) | 2016-05-21 | 2016-05-21 | Construction method for wall reinforcing structure |
| CN201610442373.3A CN106088646B (en) | 2016-05-21 | 2016-05-21 | The ruggedized construction of old building |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610442373.3A Division CN106088646B (en) | 2016-05-21 | 2016-05-21 | The ruggedized construction of old building |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107989398A CN107989398A (en) | 2018-05-04 |
| CN107989398B true CN107989398B (en) | 2020-05-12 |
Family
ID=57237314
Family Applications (7)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711245741.6A Active CN107905551B (en) | 2016-05-21 | 2016-05-21 | Construction method for wall reinforcing structure |
| CN201711245677.1A Active CN107916797B (en) | 2016-05-21 | 2016-05-21 | Construction method for improving bearing performance of old building |
| CN201711246564.3A Active CN107989398B (en) | 2016-05-21 | 2016-05-21 | Construction method for wall reinforcing structure |
| CN201711245575.XA Active CN107916796B (en) | 2016-05-21 | 2016-05-21 | A kind of structure promoting old building load-carrying properties |
| CN201610442373.3A Active CN106088646B (en) | 2016-05-21 | 2016-05-21 | The ruggedized construction of old building |
| CN201810184634.5A Active CN108360835B (en) | 2016-05-21 | 2016-05-21 | Construction method for reinforcing structure of old building |
| CN201711245752.4A Active CN107989397B (en) | 2016-05-21 | 2016-05-21 | The reinforcing construction construction method of old building |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711245741.6A Active CN107905551B (en) | 2016-05-21 | 2016-05-21 | Construction method for wall reinforcing structure |
| CN201711245677.1A Active CN107916797B (en) | 2016-05-21 | 2016-05-21 | Construction method for improving bearing performance of old building |
Family Applications After (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711245575.XA Active CN107916796B (en) | 2016-05-21 | 2016-05-21 | A kind of structure promoting old building load-carrying properties |
| CN201610442373.3A Active CN106088646B (en) | 2016-05-21 | 2016-05-21 | The ruggedized construction of old building |
| CN201810184634.5A Active CN108360835B (en) | 2016-05-21 | 2016-05-21 | Construction method for reinforcing structure of old building |
| CN201711245752.4A Active CN107989397B (en) | 2016-05-21 | 2016-05-21 | The reinforcing construction construction method of old building |
Country Status (1)
| Country | Link |
|---|---|
| CN (7) | CN107905551B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2523627A1 (en) * | 1982-03-22 | 1983-09-23 | Campenon Bernard | METHOD FOR CONFORTING ARCHES OR SIMILAR CONSTRUCTIONS |
| JP3946517B2 (en) * | 2001-12-28 | 2007-07-18 | 鹿島建設株式会社 | Seismic reinforcement method for existing steel arch bridge |
| CN100564720C (en) * | 2006-03-10 | 2009-12-02 | 湖南高岭建设集团股份有限公司 | Crack resistant steel concrete wall |
| CN102041849A (en) * | 2010-12-03 | 2011-05-04 | 同济大学 | Double-angle spliced buckling-restrained brace |
| CN202509792U (en) * | 2012-03-31 | 2012-10-31 | 西安工业大学 | Cement mortar surface layer reinforcing mesh for reinforcing brick-concrete structural wall |
| CN102704698B (en) * | 2012-05-04 | 2015-10-28 | 南京盛圆土木工程高科技有限公司 | A kind of full prestressing composite integrated reinforced steel concrete structure |
| CN102900242A (en) * | 2012-11-16 | 2013-01-30 | 南京工业大学 | Steel bar concrete beam reinforcing structure with partially restrained steel truss |
| CN103352581B (en) * | 2013-07-09 | 2015-12-09 | 北京筑福国际工程技术有限责任公司 | Adopt the method for inner prestressed reinforcement bolt anchorage sintered clay brick masonry structure |
| CN105421808A (en) * | 2015-12-03 | 2016-03-23 | 四川省大卫建筑设计有限公司 | Method for repairing crack in historic building wall |
-
2016
- 2016-05-21 CN CN201711245741.6A patent/CN107905551B/en active Active
- 2016-05-21 CN CN201711245677.1A patent/CN107916797B/en active Active
- 2016-05-21 CN CN201711246564.3A patent/CN107989398B/en active Active
- 2016-05-21 CN CN201711245575.XA patent/CN107916796B/en active Active
- 2016-05-21 CN CN201610442373.3A patent/CN106088646B/en active Active
- 2016-05-21 CN CN201810184634.5A patent/CN108360835B/en active Active
- 2016-05-21 CN CN201711245752.4A patent/CN107989397B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN107916796B (en) | 2019-03-05 |
| CN106088646A (en) | 2016-11-09 |
| CN107916797A (en) | 2018-04-17 |
| CN108360835A (en) | 2018-08-03 |
| CN107989397A (en) | 2018-05-04 |
| CN107989398A (en) | 2018-05-04 |
| CN107905551A (en) | 2018-04-13 |
| CN107989397B (en) | 2019-03-05 |
| CN106088646B (en) | 2018-07-24 |
| CN107905551B (en) | 2020-02-04 |
| CN107916796A (en) | 2018-04-17 |
| CN108360835B (en) | 2020-02-04 |
| CN107916797B (en) | 2020-05-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10640977B2 (en) | Concrete structure using reinforcing panel including embedded reinforcing grid and method of repairing and reinforcing the same | |
| CN104847130B (en) | A kind of ruggedized construction and its construction method of existing structure beam | |
| CN108360835B (en) | Construction method for reinforcing structure of old building | |
| CN105625197A (en) | Concrete beam bending reinforcing method based on steel plate-prestressed carbon fiber plate | |
| KR100613592B1 (en) | Method for mending/reinforcing crack of concrete structures using a stainless steel wire mesh | |
| CN107013040A (en) | The construction method of floor is poured after a kind of sleeve built-in type | |
| CN107165436B (en) | Brick wall reinforcing structure | |
| CN102808414A (en) | Bonded post-tensioned prestressed anchoring construction method for cast-in-place concrete structure | |
| KR100982241B1 (en) | Repairing method of steel pipe and concrete pile | |
| CN104863382B (en) | Roof boarding reinforcement means | |
| CN104153302B (en) | The reinforcement means of concrete bridge deck beam | |
| KR101083626B1 (en) | Structure filling method for srtucture reinforcement under concrete surface | |
| CN105926650A (en) | Concrete layer landslide prevention fixing device for slope building | |
| CN114753668B (en) | Construction method of unbonded prestressed steel wire rope reinforced brick masonry wall | |
| CN210163848U (en) | External reinforcing apparatus of reinforced concrete roof beam | |
| KR101013090B1 (en) | A reinforcement construction methods for slab using a reinforcement mortar | |
| CN220768569U (en) | Large building roof prestress structure | |
| CN216811108U (en) | Reinforced structure for additionally arranging reinforced concrete columns on masonry wall | |
| CN209837710U (en) | Banded full-section slip casting pipe assembly | |
| CN217174968U (en) | Structural crack repairing reinforcement for subway station | |
| CN114517593A (en) | Bottom-to-plate grouting reinforcement process for floor slab, matching device thereof and reinforced formed floor slab | |
| CN115306175A (en) | New and old wall anti-cracking structure and construction method thereof | |
| CN114809604A (en) | Pouring template and pouring structure for sealing post-pouring belt of shear wall | |
| CN114718239A (en) | Composite system floor and construction method thereof | |
| CN114718130A (en) | Repairing and reinforcing method and reinforcing member for structural crack of subway station |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 325000, No. 48, Jingshan Hill Road, Ouhai District, Wenzhou, Zhejiang Applicant after: Ye Changqing Address before: 325000 No. 4, Jinchuan Road, Tianhe street, Wenzhou economic and Technological Development Zone, Zhejiang, China Applicant before: Ye Changqing |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201229 Address after: 537100 Comprehensive Economic Development Zone of Three-invested Enterprises in Gangnan District, Guigang City, Guangxi Zhuang Autonomous Region (near the traffic lights of Jiangnan Industrial Zone) Patentee after: Guangxi Xin Bin Cheng Machinery Co.,Ltd. Address before: 325000 No. 48 Xinghai Road, Jingshan Street, Ouhai District, Wenzhou City, Zhejiang Province Patentee before: Ye Changqing |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221012 Address after: 353500 No. 275, Gongnong East Road, Songyuan street, Songxi County, Nanping City, Fujian Province Patentee after: Fujian Zhonglin Engineering Construction Co.,Ltd. Patentee after: Qiaozhi Construction Co.,Ltd. Patentee after: FUZHOU University Address before: 537100 Comprehensive Economic Development Zone of Three-invested Enterprises in Gangnan District, Guigang City, Guangxi Zhuang Autonomous Region (near the traffic lights of Jiangnan Industrial Zone) Patentee before: Guangxi Xin Bin Cheng Machinery Co.,Ltd. |