Steel channel joist reinforced masonry structure lintel
By combining channel steel support beams with fastening bolts, the problem of tensile stress bearing in pressure grouting reinforcement of cracks in masonry lintels was solved, thus improving the reinforcement effect and construction efficiency of the structure.
Patent Information
- Application Number
- CN202422542937.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-21
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2034-10-21
AI Technical Summary
Existing technologies are insufficient to effectively withstand the tensile stress generated by pressure grouting reinforcement when dealing with cracks in existing masonry lintels. Furthermore, the construction process is complex and consumes a large amount of materials, resulting in high project costs.
The cracks in the masonry structure lintels are reinforced by using channel steel support beams and fastening bolts. The channel steel support beams are embedded in the wall and connected to the fastening bolts. Pressure grouting is then performed using cement polymer grouting liquid to reinforce the structure and form a stable structural connection.
It improved the ductility and collapse resistance of the structure, simplified the construction process, saved engineering materials, reduced project costs, and achieved a high-performance reinforcement effect at a cost-effective price.
Smart Images
Figure CN223739035U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a channel steel joist reinforced masonry structure lintel belongs to old community comprehensive reconstruction technical field. BACKGROUND
[0002] For existing masonry structure lintel crack, usually adopt the method of pressure grouting reinforcement. Pressure grouting is by means of compressed air, cement polymer grouting liquid is injected into the masonry structure crack, underfilled mortar joint, hole and loose masonry structure, to achieve the recovery of structure integrity, improve the strength and durability of masonry structure, improve the performance of masonry structure waterproof and impermeable. After many earthquakes, this method is safe and reliable, obviously improves the ductility of structure, enhances the anti-collapse ability of structure. Cement polymer grouting liquid is the most commonly used masonry grouting liquid, which is mixed with a certain amount of colloidal suspending agent in pure cement slurry, to improve the adhesion of slurry, improve the groutability of slurry, and enhance the strength of masonry structure. Before using pressure grouting reinforcement for masonry structure lintel crack, the crack should be reinforced. Usually, channel steel joist and fastening bolt are used to reinforce the masonry structure lintel around the crack to bear the tensile stress generated by pressure grouting reinforcement. The utility model mainly uses channel steel joist and fastening bolt to reinforce the crack of masonry structure lintel, and then carries out pressure grouting reinforcement on the crack. CONTENT OF UTILITY MODEL
[0003] The utility model provides a channel steel joist reinforced masonry structure lintel, mainly for the method of pressure grouting reinforcement for existing masonry structure lintel crack, and the utility model adopts the following technical scheme:
[0004] The channel steel joist reinforced masonry structure lintel, as shown in the figure, comprises a channel steel joist and a fastening bolt. Figures 1-2 The channel steel joist is arranged at the lower part of the masonry structure lintel crack, and the channel steel joist is symmetrically arranged at the lower part of the original structure lintel. The channel steel joist is embedded into the wall body. The channel steel joist is provided with a mounting hole for passing through the fastening bolt. The channel steel joist is fastened and connected to the channel steel joist on the other side of the lintel through the fastening bolt and the nut, and the recess of the channel steel joist is filled with plaster mortar. After the channel steel joist, the fastening bolt and the like are completely installed, cement polymer grouting liquid is injected at the crack.
[0005] Further, the channel steel joist is a channel steel of 10.
[0006] Further, the mounting hole on the channel steel joist is φ12, and the spacing between the mounting holes is not less than 300mm.
[0007] Further, the fastening bolt is M10 bolt, and the hole diameter drilled on the original structure beam is 12mm.
[0008] Further, the plastering mortar is the outer steel wire mesh plastering mortar.
[0009] Further, the cement used in the cement polymer grouting liquid is 42.5 ordinary portland cement, the sand is fine sand with particle size not more than 0.5mm, and the water is drinking water or natural clean water.
[0010] The above-mentioned channel steel joist reinforced masonry structure beam and its construction method have the following specific implementation steps:
[0011] Step one: temporarily support the crack beam.
[0012] Step two: groove the wall body and the beam, and chisel out the 300mm long groove of the channel steel joist supporting section.
[0013] Step three: drill fastening bolt holes on the beam and the channel steel joist supporting section, the hole diameter is 12mm, and the ash is blown clean.
[0014] Step four: plaster the cement polymer grouting liquid on the joint surface of the channel steel joist and the grooved part of the beam, the thickness is 3-5mm, then paste the channel steel joist on both sides of the beam, and press tightly.
[0015] Step five: fasten the channel steel joist on both sides of the beam by the nut through the M10 fastening bolt.
[0016] Step six: pressure grouting is carried out on the wall body and the crack of the beam, the cement polymer grouting liquid is grouted, and after 1-2 days of standing, the temporary support is removed.
[0017] Step seven: rust-proof treatment is carried out on the exposed channel steel joist and fastening bolt.
[0018] Beneficial effects:
[0019] The channel steel joist reinforced masonry structure beam can bear the tensile stress generated by the pressure grouting reinforcement, the method is simple, safe and reliable in construction, can improve the ductility of the structure, enhance the anti-collapse ability of the structure, at the same time, saves the engineering quantity, saves the engineering materials, and reduces the engineering cost, and the method is one of the methods with high cost performance for the seismic reinforcement of the existing masonry structure beam cracks. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 It is a schematic diagram of the channel steel joist reinforced masonry structure beam;
[0021] Figure 2 It is the A-A sectional view of Figure 1 .
[0022] In the figure, 1: channel steel joist; 2: fastening bolt; 3: channel steel joist supporting section; 4: wall; 5: lintel; 6: crack; 7: nut; 8: plastering mortar. DETAILED DESCRIPTION
[0023] The specific embodiment of the utility model is as follows:
[0024] The channel steel joist reinforced masonry structure lintel, as shown in the figure, is characterized in that it comprises a channel steel joist 1 and a fastening bolt 2. Figures 1-2 The channel steel joist 1 is arranged at the lower part of the crack of the masonry structure lintel 5, and the channel steel joist 1 is symmetrically arranged at both sides of the lower part of the original structure lintel 5. The channel steel joist 1 is arranged at the lower part of the crack of the masonry structure lintel 5, and the channel steel joist 1 is symmetrically arranged at both sides of the lower part of the original structure lintel 5. The channel steel joist 1 is arranged at the lower part of the crack of the masonry structure lintel 5, and the channel steel joist 1 is symmetrically arranged at both sides of the lower part of the original structure lintel 5. The channel steel joist 1 is arranged at the lower part of the crack of the masonry structure lintel 5, and the channel steel joist 1 is symmetrically arranged at both sides of the lower part of the original structure lintel 5. The channel steel joist 1 is arranged at the lower part of the crack of the masonry structure lintel 5, and the channel steel joist 1 is symmetrically arranged at both sides of the lower part of the original structure lintel 5.
[0025] Further, the channel steel joist 1 is a channel steel of.
[0026] Further, the mounting hole on the channel steel joist 1 is φ12, and the spacing between the mounting holes is not less than 300mm.
[0027] Further, the fastening bolt 2 is an M10 bolt, and the hole diameter drilled on the original structure lintel 5 is 12mm.
[0028] Further, the plastering mortar 8 is an external steel wire mesh plastering mortar.
[0029] Further, the cement used in the cement polymer grouting liquid is ordinary portland cement with a strength grade of 42.5, the sand is fine sand with a particle size not greater than 0.5mm, and the water is drinking water or natural clean water.
[0030] The channel steel joist reinforced masonry structure lintel and the construction method thereof are as follows:
[0031] Step one: temporarily support the crack lintel 5.
[0032] Step two: groove the wall 4 and the lintel 5, and chisel out the 300mm long groove of the channel steel joist supporting section 3.
[0033] Step three: drill the holes of the fastening bolt 2 on the lintel 5 and the channel steel joist supporting section 3, the hole diameter is 12mm, and the dust is blown clean.
[0034] Step four: cement polymer grouting liquid is applied on the joint surface between the channel steel joist 1 and the lintel 5, with a thickness of 3-5 mm, and then the channel steel joist 1 on both sides of the lintel 5 is pasted and pressed.
[0035] Step five: the channel steel joist 1 on both sides of the lintel 5 is fastened and connected through the nut 7 by the M10 fastening bolt 2.
[0036] Step six: pressure grouting is performed on the cracks 6 of the wall body 4 and the lintel 5, and cement polymer grouting liquid is injected, and after standing for 1-2 days, the temporary support is removed.
[0037] Step seven: rust-proof treatment is performed on the exposed channel steel joist 1 and the fastening bolt 2.
[0038] The above is a typical embodiment of the present application, and the specific implementation of the present application is not limited thereto.
Claims
1. A channel joist reinforced masonry structure lintel, characterised in that: The utility model provides a kind of structure for the crack treatment of masonry structure overpass, including channel steel joist (1), fastening bolt (2);The channel steel joist (1) is arranged in the lower part of masonry structure overpass (5) crack, the channel steel joist (1) is symmetrically arranged in the lower part of original structure overpass (5) two sides;Channel steel joist (1) is extended 300mm along wall body each end, forms channel steel joist support section (3), and channel steel joist (1) on channel steel joist support section (3) is embedded in wall body (4) entirely;The channel steel joist (1) is equipped with mounting hole, for passing through fastening bolt (2);The channel steel joist (1) is fastened and connected by fastening bolt (2), nut (7) and the channel steel joist (1) of other side of overpass (5), and is filled in the recess of channel steel joist (1) with plastering mortar (8);After the channel steel joist (1), fastening bolt (2) are all installed, crack (6) is injected cement polymer grouting fluid.
2. The channel joist reinforced masonry structure lintel according to claim 1, wherein: The channel steel joist (1) is channel steel of 10.
3. The channel joist reinforced masonry structure lintel according to claim 1, wherein: The mounting hole on the channel steel joist (1) is φ12, and the distance between mounting holes is not less than 300mm.
4. The channel joist reinforced masonry structure lintel according to claim 1, wherein: The fastening bolt (2) is M10 bolt, and the hole diameter on the original structure overpass (5) is 12mm.
5. The channel joist reinforced masonry structure lintel according to claim 1, wherein: The plastering mortar (8) is outer steel mesh plastering mortar.
6. The channel joist reinforced masonry structure lintel according to claim 1, wherein: The cement polymer grouting fluid uses ordinary portland cement with strength grade of 42.5, fine sand with particle size not more than 0.5mm and water as drinking water or natural clean water.