CN110331868B - External prestress reinforcing method for support pillar removing - Google Patents
External prestress reinforcing method for support pillar removing Download PDFInfo
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- CN110331868B CN110331868B CN201910640469.4A CN201910640469A CN110331868B CN 110331868 B CN110331868 B CN 110331868B CN 201910640469 A CN201910640469 A CN 201910640469A CN 110331868 B CN110331868 B CN 110331868B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
Abstract
The invention discloses a method for strengthening external prestress of a support column, which relates to the technical field of house improvement and aims to solve the technical problem that the support column for supporting a floor slab is often arranged in the middle of the existing house, and the support column arranged in the middle of the house is in a large-space barrier-free field in some places, so that the support column arranged in the middle of the house can generate interference; the support column is provided with the reinforcement floor along floor length direction's both sides, wears to be equipped with the reinforcement cable in the middle of the reinforcement floor, and the reinforcement cable both ends are fixed respectively in the shear force wall along floor width direction both sides, and the both ends that the support column was kept away from to the reinforcement cable are provided with the reinforcement ground tackle respectively, and the reinforcement cable both ends are pour in the shear force wall. The effect of taking out the support column of house intermediate position to remove ice and strengthening house overall structure in order to guarantee the balanced atress of roof beam body and floor through reinforced structure has been reached.
Description
Technical Field
The invention relates to the technical field of house improvement, in particular to a method for reinforcing external prestress of a support pillar.
Background
The main structure of a house refers to a plane or space system which is formed by connecting a plurality of components and can bear the action in the house building. The main structure should have sufficient strength, rigidity and stability to withstand various loads on the building. The main structure in building construction is a structural system generally composed of columns, beams and plates, and the construction of the whole building can be completed by adding structures such as walls and the like on the structural system.
The prior Chinese patent with the publication number of CN102418386B discloses a novel reinforced concrete precast integral casting house structure system, which comprises a floor slab, a superposed beam and a column and/or a shear wall, wherein the superposed beam is divided into a main beam and a secondary beam, the superposed beam comprises a prestressed precast beam and a cast-in-place part, the prestressed precast beam comprises a beam body and prestressed steel strands, the end part of the beam body is provided with profile steel, the part of the profile steel is embedded in the beam body, the rest part of the profile steel is exposed at the end part of the beam body, the precast beam in the main beam is connected with the column and/or the shear wall through the profile steel, the precast beam in the secondary beam is placed on the main beam through the profile steel, and a plurality of formwork supporting holes are longitudinally arranged on the beam body of the precast beam of the secondary beam and the beam body of the main beam parallel to the secondary beam.
However, the supporting columns for supporting the floor slabs are often arranged in the middle of the existing house, the condition that the use of the building space cannot be met can be generated in the process of designing and using some buildings, and a large-space barrier-free place is needed in some places, so that the supporting columns arranged in the middle of the house can be interfered, and the improvement is needed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a method for reinforcing external prestress of a support column, which has the advantage that the support column in the middle of a house is taken out to be deiced, and the whole structure of the house is reinforced through a reinforcing structure so as to ensure the stress balance of a beam body and a floor slab.
In order to achieve the purpose, the invention provides the following technical scheme:
a supporting column removing external prestress reinforcing structure comprises a floor slab, supporting columns and shear walls, wherein reinforcing ribs are arranged on the bottom wall of the floor slab, the supporting columns are arranged at the bottom ends of the reinforcing ribs, and the shear walls are arranged on the periphery of the floor slab; the method is characterized in that: the reinforcing rib plates are arranged on two sides of the supporting column along the length direction of the floor slab, reinforcing cables penetrate through the middle of the reinforcing rib plates, two ends of each reinforcing cable are fixed in the shear walls along two sides of the width direction of the floor slab respectively, reinforcing anchors are arranged at two ends, far away from the supporting column, of each reinforcing cable respectively, and two ends of each reinforcing cable are poured in the shear walls.
Through adopting above-mentioned technical scheme, get rid of behind the support column through the fixed power decomposition to two on the floor span of the reinforcement cable that sets up of support column top on the support column. The reinforcing inhaul cable is fixed on the shear walls on the two sides through the reinforcing anchorage device and the pouring, so that the floor slab is effectively supported, the problems that the span is increased after the supporting column is removed and the stress is changed are solved, and the stability of the house after the supporting column is removed is guaranteed.
Further, the surface of the reinforcing rib plate is provided with a supporting plate, the bottom end of the supporting plate is provided with a fixed steel pipe, the reinforcing inhaul cable is inserted into the fixed steel pipe, a structure adhesive layer is arranged between the reinforcing rib plate and the supporting column, and the structure adhesive layer wraps the periphery of the supporting column.
Through adopting above-mentioned technical scheme, the setting of backup pad and fixed steel pipe is convenient for fix the reinforcement cable in strengthening the floor, and the backup pad sets up perpendicularly with the reinforcement floor and fixed steel pipe setting has improved the fixed stability of fixed steel pipe in the backup pad bottom for thereby fixed steel pipe holding power is directly exerted and is whole more be convenient for support the floor through fixed steel pipe through strengthening the cable in the backup pad.
Further, the support column is provided with the butt mounting respectively along reinforcement floor length direction's both sides, the butt mounting offsets with the reinforcement floor, butt mounting both ends are provided with the groove of stepping down that steps down for fixed steel pipe, fixed steel pipe offsets with the groove roof of stepping down.
Through adopting above-mentioned technical scheme, the setting of butt mounting has set up the groove of stepping down at the both ends of fixed steel pipe and has carried out further support to fixed steel pipe to through the butt with power dispersion conduction to the support column in, thereby realize consolidating the cable and carrying out the support better to the floor.
Further, be provided with the damping support between support column and the reinforcement ground tackle, the damping support includes the support body and sets up the staple bolt fixed at support body both ends, it wears to establish in the staple bolt to consolidate the cable, be provided with the damping bolster between reinforcement cable and the support body lateral wall.
Through adopting above-mentioned technical scheme, because the floor top still has the one deck, the vibration on floor upper strata can lead to consolidating the resonance of cable, the damping support with the setting of damping bolster be convenient for to the floor upper strata conduct the vibration on consolidating the cable and cushion to alleviate the damage that resonance caused the shear force wall.
Furthermore, the surface of one side of the vibration-damping buffer piece close to the reinforced inhaul cable is provided with an arc-shaped binding surface, and a deformation cavity is arranged inside the vibration-damping buffer piece.
Through adopting above-mentioned technical scheme, the setting of arc binding face is convenient for the damping bolster and is laminated better with the reinforcement cable, and the setting of deformation cavity has improved the compliance of damping bolster for the damping bolster is changeed deformation, thereby plays the effect to the vibration buffering better.
Further, be provided with a plurality of reinforcement muscle in the shear force wall, consolidate the ground tackle and include anchor slab and latch segment, the one end that the shear force wall was kept away from to the reinforcement muscle is fixed on the anchor slab of consolidating the ground tackle, the anchor slab sets up on the reinforcement muscle of keeping away from support column one side, be provided with a plurality of anchor holes on the anchor slab, it includes the steel strand wires more than six to consolidate the cable, the steel strand wires are inserted and are established in the anchor hole, the latch segment sets up on the lateral wall of steel strand wires, the latch segment lateral wall is provided with the direction inclined plane, the latch segment lateral wall is the joint with the inboard wall in anchor hole.
Through adopting above-mentioned technical scheme, the mode that adds the muscle through the bar planting is fixed in shear force wall and stiffening rib, has played fine reinforcing effect to the fixed department that the shear force wall is located the reinforcement cable to be convenient for fix the concrete form, thereby be convenient for carry on concrete placement on the lateral wall that adds the muscle and reinforce the cable, realize the further fixed to the reinforcement cable.
Further, reinforced rib plate, butt mounting and steel strand wires lateral wall are provided with hot-galvanize anticorrosive coating, the lateral wall parcel that the steel strand wires are located hot-galvanize anticorrosive coating has the protective layer, it is provided with the inoxidizing coating to consolidate the cable lateral wall, be provided with the protection rubber pad in the fixed steel pipe.
Through adopting above-mentioned technical scheme, the setting of hot-galvanize anticorrosive coating, protective layer and inoxidizing coating is convenient for provide the antiseptic measure to reinforcing floor, butt mounting and steel strand wires lateral wall to the corruption of reinforcing floor, butt mounting and steel strand wires has been delayed effectively, has improved the durability of reinforcing floor, butt mounting and steel strand wires. The setting of protection rubber pad alleviates the arris of fixed steel pipe tip and causes the damage to strengthening the cable to damage hot-galvanize anticorrosive coating and inoxidizing coating, lead to strengthening the accelerated corrosion of cable.
Furthermore, a pressure detection device is arranged on the surface, attached to the reinforcing inhaul cable, of the fixed steel pipe, a control device is coupled to the pressure detection device, a display device is coupled to the control device, and the display device is used for displaying the supporting force, applied to the fixed steel pipe, of the reinforcing inhaul cable.
Through adopting above-mentioned technical scheme, pressure measurement device's setting is convenient for detect the holding power of reinforcing cable to the floor to the operator of being convenient for adjusts the rate of tension of reinforcing cable according to the registration that display device shows, and detects the rate of tension of reinforcing cable after the installation is accomplished through the registration that display device shows, thereby the holding power that the prevention reinforcing cable pine leads to reduces.
A construction method applied to the support column removing external prestress reinforcing structure comprises the following steps:
s100, drilling the top end of the support pillar to be removed, penetrating a screw into the hole, coating structural adhesive on the top end of the support pillar, and fixing a reinforcing rib plate and an abutting fixing piece on the outer side wall of the support pillar;
s200, installing the vibration damping support on a floor slab through an expansion bolt, and penetrating a reinforcing inhaul cable into the fixed steel pipe, penetrating through a hoop of the vibration damping support and abutting against the protective rubber pad and the vibration damping buffer piece respectively;
s300, properly chiseling the wall bodies on the two sides of the shear wall and the reinforcing ribs, and leaving reinforcing steel bars in the concrete; punching holes on the shear walls and the reinforcing ribs on the two sides of the supporting column, injecting bar-planting glue into the holes, and implanting reinforcing bars into the shear walls, wherein different reinforcing bars are implanted into the two sides of the shear walls respectively;
s400, sleeving an anchor plate on one side, far away from the support column, of the shear wall, fixing the anchor plate through welding, then respectively penetrating steel strands in the reinforcing inhaul cable through anchor holes of the anchor plate, and inserting a locking block into the anchor holes to be clamped and fixed; adjusting the tension degree of the reinforcing inhaul cable, and judging the supporting force of the reinforcing inhaul cable on the floor slab through the detection result of the pressure detection device displayed by the display device, so that the reinforcing inhaul cable supports the fixed steel pipe;
s500, after the stress reaches a balanced state, fixing a concrete pouring template on the reinforcing ribs, pouring concrete in the template, and wrapping the solidified concrete on the reinforcing inhaul cables and the outer side walls of the exposed reinforcing steel bars after chiseling so as to protect and fix the reinforcing inhaul cables;
s600, cutting off and detaching the part of the support column at the bottom end of the reinforcing rib plate after the concrete is solidified.
Through adopting above-mentioned technical scheme, it is fixed and carry out effectual fixed to the reinforcement cable through the mode of removing partly wall body and pouring again to consolidate the cable through consolidating the ground tackle. After a part of wall bodies are chiseled off, reinforcing ribs are implanted into the shear wall and the reinforcing ribs in a rib planting mode, so that the strength of the fixed reinforcing stay rope of the shear wall is enhanced, and the probability that the shear wall is damaged due to the tensile force is reduced. And further fixing and supporting are carried out through the poured concrete blocks, so that the prestressed supporting after the supporting columns are removed is realized.
Further, the following steps are added after step S500:
s501, brushing protective paint on the outer side walls of the reinforcing inhaul cables, the reinforcing rib plates and the abutting fixing pieces to form protective paint layers.
Through adopting above-mentioned technical scheme, the inoxidizing coating has formed the one deck protective layer at reinforcing cable, reinforcing floor and butt mounting lateral wall, effectively reduces the probability with the moisture contact to the probability that reinforcing cable, reinforcing floor and butt received the corruption has been reduced.
In conclusion, the invention has the following beneficial effects:
1. the reinforced inhaul cable, the reinforced anchorage device and the technology that the two ends are poured and the supporting plates, the fixed steel pipes and the abutting fixing pieces are matched are adopted, so that the effect that the floor slab is effectively supported through the reinforced inhaul cable, and the integral strength of the house after the supporting columns are removed is ensured;
2. the technology that the vibration-damping support, the hoop, the vibration-damping buffer piece, the arc-shaped binding surface and the deformation cavity are matched is adopted, so that the vibration generated on the top surface of the floor slab and transmitted to the reinforcing inhaul cable is effectively buffered, and the effect that the shear wall body is influenced by resonance is reduced;
3. the matched technology of the hot galvanizing anticorrosive coating, the protective layer, the protective paint layer and the protective rubber pad is adopted, so that effective anticorrosion treatment is performed on the reinforced stay cable, the reinforced rib plate and the butt fixing piece, and the damage of the end edge of the fixed steel pipe to the reinforced stay cable is reduced through the protective rubber pad, so that the integral anti-corrosion performance is improved.
Drawings
FIG. 1 is a schematic overall structure diagram of an external prestress reinforcement structure for a support removing column in the embodiment;
FIG. 2 is a schematic view of an embodiment for revealing structures at the reinforcing ribs;
FIG. 3 is a schematic view of an embodiment for revealing the structure at the reinforcing ribs;
FIG. 4 is a schematic view for showing a structure at a vibration damping mount in the embodiment;
FIG. 5 is a schematic view showing a structure of a reinforcing rib in the embodiment;
fig. 6 is a schematic diagram for showing the structure of the pressure detection device in the embodiment.
In the figure: 1. a floor slab; 10. reinforcing ribs; 11. a support pillar; 111. a structural adhesive layer; 12. a shear wall; 13. a load-bearing column; 2. reinforcing the ribbed plate; 20. an end plate; 21. a support plate; 211. fixing the steel pipe; 2111. a protective rubber pad; 22. abutting against the fixing piece; 221. a side plate; 222. a top plate; 223. a reinforcing plate; 23. a yielding groove; 3. reinforcing the inhaul cable; 31. reinforcing the anchorage device; 311. an anchor plate; 3111. an anchoring hole; 312. a locking block; 3121. a guide slope; 32. steel strand wires; 4. a vibration damping support; 41. a support body; 42. hooping; 43. a vibration damping buffer; 431. an arc-shaped binding surface; 432. deforming the cavity; 5. reinforcing ribs; 6. a pressure detection device; 61. a control device; 611. a display device.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example (b):
a prestress reinforcing structure without supporting columns outside bodies, referring to fig. 1, comprises a floor slab 1, supporting columns 11 and a shear wall 12, wherein reinforcing ribs 10 are arranged on the bottom wall of the floor slab 1, and the supporting columns 11 are arranged at the bottom ends of the reinforcing ribs 10. The bottom end of the reinforcing rib 10 is further provided with load-bearing columns 13, the load-bearing columns 13 are arranged between the shear walls 12, the shear walls 12 are arranged around the floor slab 1, and the floor slab 1, the supporting columns 11, the shear walls 12 and the load-bearing columns 13 are fixed through concrete pouring.
Referring to fig. 1 and 2, reinforcing rib plates 2 are arranged on two sides of a support column 11 along the length direction of a floor slab 1, the reinforcing rib plates 2 are cast by iron, end plates 20 are arranged at the top ends of the reinforcing rib plates 2, and the reinforcing rib plates 2 and the end plates 20 are fixed by screws and nuts penetrating through the support column 11. The middle of the reinforcing rib plate 2 is penetrated with a reinforcing cable 3, and two ends of the reinforcing cable 3 are respectively fixed in the shear walls 12 at two sides along the width direction of the floor slab 1. And reinforcing anchors 31 are respectively arranged at two ends of the reinforcing cables 3 far away from the supporting columns 11, and the reinforcing cables 3 penetrate through the shear wall 12 and are fixed in the reinforcing anchors 31. Two ends of the reinforcing cables 3 are poured in the shear wall 12, and part of the shear wall 12 is chiseled off, the fixing cables are integrally poured on the shear wall 12 and are matched with the reinforcing anchorage device 31 for fixing, so that the reinforcing rib 10 at the bottom end of the floor slab 1 is supported, and the problem of strength caused by span increase of the floor slab 1 after the supporting columns 11 are removed is solved.
Referring to fig. 3, a support plate 21 is provided on the surface of the reinforcing rib 2, the support plate 21 is formed integrally with the reinforcing rib 2, the support plate 21 has a right trapezoid shape, the right-angled waist is fixed to the side wall of the reinforcing rib 2, and the longer bottom side is fixed to the end plate 20. The bottom end of the support plate 21 is provided with a fixed steel pipe 211, the fixed steel pipe 211 penetrates through and is welded and fixed in the support plate 21, and the fixed steel pipe 211 is perpendicular to the support plate 21.
Referring to fig. 2 and 3, the reinforcing cable 3 is inserted into the fixing steel pipe 211, and the reinforcing cable 3 presses the downward force of the supporting column 11 on the reinforcing cable 3 through the fixing steel pipe 211 and transmits the downward force to the shear walls 12 on both sides. Be provided with structure glue film 111 between reinforcement ribbed slab 2 and the support column 11, structure glue film 111 is the formation of epoxy structure glue, and structure glue film 111 wraps up around support column 11, plays the effect of fixing and protection support column 11 cylinder.
Referring to fig. 3, the abutting fixture 22 is respectively disposed on both sides of the supporting column 11 along the length direction of the reinforcing rib plate 2, the abutting fixture 22 includes a side plate 221, a top plate 222 and a reinforcing plate 223, the top plate 222 is disposed on the top end of the reinforcing plate 223 and is perpendicular to the side plate 221, the reinforcing plate 223 is fixed on the side wall of the side plate 221 and is perpendicular to the side wall, and the side plate 221 and the top plate 222 are disposed perpendicular to each other, so that the strength of the abutting fixture 22 is improved. The side of the side plate 221 remote from the reinforcing plate 223 is fixed to the side wall of the support column 11 by screws and nuts. The butt fixing piece 22 offsets with the reinforcing rib plate 2, the butt fixing piece 22 both ends are provided with the groove 23 of stepping down that steps down for fixed steel pipe 211, and the groove 23 of stepping down is the arc, and fixed steel pipe 211 offsets with the groove 23 roof of stepping down.
Referring to fig. 2 and 4, a damping support 4 is disposed between the supporting column 11 and the reinforcing anchor 31, the damping support 4 includes a support body 41 and anchor ears 42 fixed at two ends of the support body 41, the top end of the damping support 4 is fixed on the reinforcing rib 10 by expansion bolts and nuts, and the anchor ears 42 are fixed on the side walls of the support body 41 by bolts. The reinforcing inhaul cable 3 penetrates through the anchor ear 42, the anchor ear 42 is in a ring shape, the diameter of the anchor ear 42 is matched with that of the reinforcing inhaul cable 3, a vibration damping buffer piece 43 is arranged between the reinforcing inhaul cable 3 and the outer side wall of the support body 41, and the vibration damping buffer piece 43 is fixed on the side wall of the support body 41 in a cementation mode.
Referring to fig. 4, one side surface of the damping buffer 43 close to the reinforced cable 3 is provided with an arc abutting surface 431, the radian of the arc abutting surface 431 is the same as that of the reinforced cable 3, a deformation cavity 432 is arranged inside the damping buffer 43, and the deformation cavity 432 is provided with one side of the damping buffer 43 far away from the arc abutting surface 431 so as to increase the flexibility of the damping buffer 43 and facilitate damping buffering.
Referring to fig. 2 and 5, a plurality of reinforcing ribs 5 are arranged in the shear wall 12, the reinforcing ribs 5 on the side close to the support columns 11 are inserted into the shear wall 12 and the reinforcing ribs 10, and the reinforcing ribs 5 on the side far away from the support columns 11 are inserted into the shear wall 12 and fixed through bar planting glue. The reinforcing anchorage 31 comprises an anchor plate 311 and a locking block 312, one end of the reinforcing rib 5, which is far away from the shear wall 12, is fixed on the anchor plate 311 of the reinforcing anchorage 31, and the anchor plate 311 is arranged on the reinforcing rib 5, which is far away from one side of the supporting column 11, and is fixed through welding. Anchor plate 311 is provided with a plurality of anchor holes 3111, and anchor hole 3111 is circular through-hole, runs through anchor plate 311's lateral wall.
Referring to fig. 5, the reinforcing cable 3 includes six or more steel strands 32, and the steel strands 32 are bundled to form the reinforcing cable 3. The steel strand 32 is inserted in the anchoring hole 3111, the locking block 312 is disposed on the outer side wall of the steel strand 32, and the inner side of the locking block 312 is attached to the outer side wall of the steel strand 32. The outer side wall of the locking block 312 is provided with a guide inclined surface 3121, and the outer side wall of the locking block 312 is clamped with the inner side wall of the anchoring hole 3111, so that the steel strands 32 are respectively fixed in the anchoring hole 3111.
Referring to fig. 5 and 6, the outer side walls of the reinforcing rib plates 2, the abutting fixing pieces 22 and the steel strands 32 are provided with hot-dip galvanized anticorrosive coatings, and the hot-dip galvanized anticorrosive coatings are formed by hot-dip galvanizing zinc. The outer side wall of the steel strand 32 is wrapped with a protective layer which is an epoxy layer or is formed on the outer side of a hot galvanizing corrosion-resistant layer of the steel strand 32 through extrusion molding. 3 lateral walls of reinforcing cable are provided with the inoxidizing coating, and the inoxidizing coating is the coating of epoxy anticorrosive paint on 3 surfaces of reinforcing cable. A protective rubber pad 2111 is arranged in the fixed steel pipe 211, and the outer diameter of the protective rubber pad 2111 is the same as the inner diameter of the fixed steel pipe 211 and is fixed by glue.
Referring to fig. 6, a pressure detection device 6 is provided on the surface of the fixed steel pipe 211 to which the reinforcing cable 3 is attached, the pressure detection device 6 is a resistance strain type weighing sensor, and the pressure detection device 6 is embedded in the protective rubber pad 2111. The control device 61 is coupled to the pressure detection device 6, the control device 61 is preferably an STM32 type single chip microcomputer manufactured by seiko semiconductor corporation, the display device 611 is coupled to the control device 61, the display device 611 is preferably an LED liquid crystal display, and the display device 611 is used for displaying the magnitude of the supporting force of the reinforcing cable 3 received by the fixing steel pipe 211.
A reinforcing method applied to the external prestress reinforcing structure of the support removing column comprises the following steps:
s100, drilling is conducted on the top end of the supporting column 11 needing to be removed, the screw rod penetrates through the hole, epoxy structural adhesive is coated on the top end of the supporting column 11, then the reinforcing rib plate 2 and the abutting fixing piece 22 are fixed on the screw rod of the outer side wall of the supporting column 11 through the nut, and the reinforcing rib plate 2 and the abutting fixing piece 22 are fixed.
S200, punching holes in reinforcing ribs 10 in the middle positions of a supporting column 11 and a shear wall 12, inserting expansion bolts into the holes, screwing and fixing the expansion bolts, and fixing a damping support 4 on the expansion bolts; the reinforcing inhaul cable 3 is arranged in the fixed steel pipe 211 in a penetrating mode and penetrates through the hoop 42 of the vibration damping support 4, and abuts against the protective rubber gasket 2111 and the vibration damping buffer 43 respectively.
And S300, properly chiseling the wall bodies on the two sides of the shear wall 12 and the reinforcing ribs 10, and leaving the reinforcing steel bars in the concrete. And punching holes on the shear wall 12 and the reinforcing rib 10 on two sides of the supporting column 11, injecting bar-planting glue into the holes, implanting reinforcing ribs 5 into the shear wall 12, and solidifying and fixing the bar-planting glue. Different reinforcing ribs 5 are respectively implanted into two sides of the shear wall 12, the reinforcing ribs 5 on one side of the shear wall 12 close to the support column 11 are simultaneously inserted into the shear wall 12 and the reinforcing ribs 10, so that the reinforcing ribs 5, the shear wall 12 and the reinforcing ribs 10 form a right-angled triangle, and the reinforcing ribs 5 on one side far away from the support column 11 are only inserted into the shear wall 12.
S400, sleeving an anchor plate 311 on one side, away from the support column 11, of the shear wall 12 and fixing the anchor plate by welding, then respectively penetrating the steel stranded wires 32 in the reinforcing inhaul cable 3 through the anchor holes 3111 of the anchor plate 311 and inserting the locking block 312 into the anchor holes 3111 for clamping and fixing. Adjust the rate of tension of consolidating cable 3, judge the holding power of consolidating cable 3 to floor 1 through the pressure measurement device 6 testing result that display device 611 shows for consolidate cable 3 and support fixed steel pipe 211, thereby carry out effectual support to floor 1.
S500, after the stress reaches a balanced state, fixing a concrete pouring template on the reinforcing ribs 5, pouring concrete in the template, wherein the concrete adopts C50 grade, enabling the concrete to be uniformly distributed through tamping vibration, and curing the concrete to be solidified. So that the concrete is solidified and then wrapped on the reinforcing inhaul cable 3 and chiseled and exposed steel bar outer side wall, and a whole is formed after the concrete is solidified so as to protect and fix the reinforcing inhaul cable 3.
S501, brushing protective paint on the outer side walls of the reinforcing inhaul cable 3, the reinforcing ribbed plates 2 and the abutting fixing piece 22, wherein the protective paint is epoxy anticorrosive paint to form a protective paint layer.
S600, cutting off and removing the part, located at the bottom end of the reinforcing rib plate 2, of the support column 11 through a cutting machine after the concrete is solidified.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (7)
1. A method for reinforcing external prestress of a support column is disclosed, wherein a structure for reinforcing external prestress of the support column comprises a floor slab (1), support columns (11) and shear walls (12), reinforcing ribs (10) are arranged on the bottom wall of the floor slab (1), the support columns (11) are arranged at the bottom ends of the reinforcing ribs (10), and the shear walls (12) are arranged on the periphery of the floor slab (1); the method is characterized in that: reinforcing rib plates (2) are arranged on two sides of the supporting column (11) along the length direction of the floor slab (1), reinforcing guy cables (3) penetrate through the middles of the reinforcing rib plates (2), two ends of each reinforcing guy cable (3) are respectively fixed in shear walls (12) on two sides along the width direction of the floor slab (1), supporting plates (21) are arranged on the surfaces of the reinforcing rib plates (2), fixed steel pipes (211) are arranged at the bottom ends of the supporting plates (21), the reinforcing guy cables (3) are inserted into the fixed steel pipes (211), and protective rubber pads (2111) are arranged in the fixed steel pipes (211); abutting fixing pieces (22) are respectively arranged on two sides of the supporting column (11) along the length direction of the reinforcing rib plate (2), reinforcing anchors (31) are respectively arranged at two ends, far away from the supporting column (11), of the reinforcing stay cable (3), and two ends of the reinforcing stay cable (3) are poured in the shear wall (12); a damping support (4) is arranged between the supporting column (11) and the reinforcing anchorage device (31), the damping support (4) comprises a support body (41) and anchor ears (42) which are arranged at two ends of the support body (41) and fixed, the reinforcing inhaul cable (3) is arranged in the anchor ears (42) in a penetrating manner, and a damping buffer piece (43) is arranged between the reinforcing inhaul cable (3) and the outer side wall of the support body (41); a plurality of reinforcing ribs (5) are arranged in the shear wall (12), the reinforcing anchorage device (31) comprises an anchor plate (311) and a locking block (312), one end of the reinforcing rib (5) far away from the shear wall (12) is fixed on an anchor plate (311) of the reinforcing anchor (31), the anchor plate (311) is arranged on the reinforcing rib (5) at one side far away from the supporting column (11), the anchor plate (311) is provided with a plurality of anchor holes (3111), the reinforcing inhaul cable (3) is formed by bundling more than six steel stranded wires (32), the surface of the fixed steel pipe (211) which is jointed with the reinforced inhaul cable (3) is provided with a pressure detection device (6), a control device (61) is coupled to the pressure detection device (6), a display device (611) is coupled to the control device (61), the display device (611) is used for displaying the supporting force of the reinforcing inhaul cable (3) on the fixed steel pipe (211);
the external prestress reinforcing method for the support removing column comprises the following steps:
s100, drilling the top end of a support pillar (11) to be removed, penetrating a screw into the hole, coating structural adhesive on the top end of the support pillar (11), and fixing a reinforcing rib plate (2) and an abutting fixing piece (22) on the outer side wall of the support pillar (11);
s200, installing the vibration damping support (4) on a floor slab (1) through an expansion bolt, penetrating the reinforcing inhaul cable (3) into the fixed steel pipe (211), penetrating through a hoop (42) of the vibration damping support (4), and respectively abutting against a protective rubber pad (2111) and a vibration damping buffer piece (43);
s300, properly chiseling the wall bodies on the two sides of the shear wall (12) and the reinforcing ribs (10) to leave reinforcing steel bars in concrete; punching holes on the shear wall (12) and the reinforcing rib (10) on two sides of the supporting column (11), injecting bar-embedding glue into the holes, embedding reinforcing ribs (5) into the shear wall (12), and respectively embedding different reinforcing ribs (5) on two sides of the shear wall (12);
s400, sleeving an anchor plate (311) on one side, far away from the supporting column (11), of the shear wall (12) and fixing the anchor plate on the reinforcing rib (5) through welding, then respectively penetrating steel stranded wires (32) in the reinforcing inhaul cable (3) through anchor holes (3111) of the anchor plate (311) and inserting a locking block (312) into the anchor holes (3111) for clamping and fixing; the tightness of the reinforcing inhaul cable (3) is adjusted, and the supporting force of the reinforcing inhaul cable (3) on the floor (1) is judged according to the detection result of the pressure detection device (6) displayed by the display device (611), so that the reinforcing inhaul cable (3) supports the fixed steel pipe (211);
s500, after the stress reaches a balanced state, fixing a concrete pouring template on the reinforcing ribs (5), pouring concrete in the template, and wrapping the solidified concrete on the reinforcing stay cables (3) and the outer side walls of the chiseled and exposed reinforcing steel bars so as to protect and fix the reinforcing stay cables (3);
s600, cutting off and removing the part of the support column (11) at the bottom end of the reinforcing rib plate (2) after the concrete is solidified.
2. The method for removing external prestress reinforcement of a supporting column according to claim 1, characterized in that: a structural adhesive layer (111) is arranged between the reinforcing rib plate (2) and the supporting column (11), and the structural adhesive layer (111) wraps the periphery of the supporting column (11).
3. The method for removing external prestress reinforcement of a supporting column according to claim 1, characterized in that: the butt mounting (22) offsets with reinforcing floor (2), butt mounting (22) both ends are provided with the groove of stepping down (23) of stepping down for fixed steel pipe (211), fixed steel pipe (211) offsets with groove of stepping down (23) roof.
4. The method for removing external prestress reinforcement of a supporting column according to claim 1, characterized in that: the damping and buffering piece (43) is provided with an arc-shaped abutting surface (431) on the surface of one side close to the reinforcing inhaul cable (3), and a deformation cavity (432) is arranged inside the damping and buffering piece (43).
5. The method for removing external prestress reinforcement of a supporting column according to claim 1, characterized in that: the steel strand wires (32) are inserted in the anchoring holes (3111), the locking blocks (312) are arranged on the outer side walls of the steel strand wires (32), the outer side walls of the locking blocks (312) are provided with guide inclined planes (3121), and the outer side walls of the locking blocks (312) are clamped with the inner side walls of the anchoring holes (3111).
6. The method for removing external prestress reinforcement of a supporting column according to claim 1, characterized in that: the reinforcing rib plate (2), the butt fixing piece (22) and the outer side wall of the steel strand (32) are provided with hot galvanizing anticorrosive coatings, the outer side wall of the steel strand (32) is located on the hot galvanizing anticorrosive coatings and wrapped by a protective layer, and the outer side wall of the reinforcing stay cable (3) is provided with a protective layer.
7. The method for removing external prestress reinforcement of a supporting column according to claim 1, characterized in that: the following steps are added after step S500:
s501, brushing protective paint on the outer side walls of the reinforcing inhaul cable (3), the reinforcing rib plates (2) and the abutting fixing piece (22) to form a protective paint layer.
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| CN111719890B (en) * | 2020-06-02 | 2021-10-26 | 东莞市大乘建筑工程技术有限公司 | Floor reinforcing and supporting system |
| CN112211424B (en) * | 2020-07-29 | 2022-02-08 | 中国建筑科学研究院有限公司 | Reinforcing system for reinforcing existing masonry by outer sleeved portal type rigid frame and construction method |
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