Reinforcing masonry structure lintel crack by adopting steel plate wedge and angle steel bracket

Abstract

The utility model relates to a masonry structure lintel crack reinforced by steel plate wedges and angle steel brackets. The masonry structure lintel crack reinforced by the steel plate wedges and the angle steel brackets comprises the angle steel brackets, the steel plate wedges and batten plates, the angle steel supports are arranged on the lower portion of a masonry structure lintel crack and symmetrically arranged on the two sides of the lower portion of an original structure lintel. The steel plate wedge is composed of a wedge opening and a wedge tail, and the steel plate wedge is symmetrically driven into the deep position of the crack from the two sides of the lintel. The batten plate is tightly attached to the angle steel bracket and is welded; after the angle steel supports, the steel plate wedges and the batten plates are all installed, cement polymerization grouting liquid is poured into the cracks. The steel plate wedges and the angle steel brackets are adopted to reinforce lintel cracks of the masonry structure, tensile stress generated by pressure grouting reinforcement can be borne, the ductility of the structure can be improved, and the anti-collapse capacity of the structure can be enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of overpass cracks of masonry structure reinforced with steel plate wedge, angle steel support, belong to old community comprehensive reconstruction technical field. BACKGROUND

[0002] For existing masonry structure overpass crack, pressure grouting reinforcement method is usually used to reinforce. Pressure grouting is to inject cement polymer grouting liquid into masonry structure cracks, under-filled mortar joints, holes and loose masonry structure by means of compressed air, to restore the integrity of the structure, improve the strength and durability of masonry structure, and improve the performance of masonry structure waterproof and anti-permeability. After several earthquakes, this method is safe and reliable, which significantly improves the ductility of the structure and enhances the anti-collapse ability of the 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 bonding capacity of the slurry, improve the groutability of the slurry and enhance the strength of the masonry structure. Before using pressure grouting reinforcement for masonry structure overpass cracks, the cracks should be reinforced, and steel plate wedge, angle steel support and other reinforcement methods are often used to bear the tensile stress generated by pressure grouting reinforcement. SUMMARY

[0003] The utility model provides a kind of overpass cracks of masonry structure reinforced with steel plate wedge, angle steel support, mainly for the reinforcement of existing masonry structure overpass crack using pressure grouting reinforcement method, the utility model takes the following technical scheme:

[0004] A kind of overpass cracks of masonry structure reinforced with steel plate wedge, angle steel support, as shown in Figures 1-4 The angle steel support is arranged at the lower part of the masonry structure overpass crack, and the angle steel support is symmetrically arranged on both sides of the lower part of the original structure overpass;The angle steel support is extended by 250mm along the wall body at both ends, forming an angle steel support supporting section, and one wing of the angle steel support of the angle steel support supporting section is embedded into the mortar joint of the wall body, with a depth of the height of the wing;The steel plate wedge is composed of wedge mouth and wedge tail, and is symmetrically driven into the steel plate wedge to the deep part of the crack on both sides of the overpass;The patch plate is arranged close to the angle steel support;The patch plate is two, with a spacing of 500mm, for connecting the angle steel supports on both sides of the lower part of the overpass;The patch plate is welded with the angle steel support;After the angle steel support, steel plate wedge and patch plate are all installed, cement polymer grouting liquid is injected at the crack.

[0005] Further, the angle steel support is an equilateral angle steel of L50x5.

[0006] Further, the steel plate wedge is Q235B steel plate, with a thickness of 2mm for wedge mouth and 15mm for wedge tail.

[0007] Further, the steel wedge height h is the height H of the lintel flat arch, and the steel wedge width b is (1 / 2B-15) mm of the lintel width.

[0008] Further, the steel wedge height h is the height H of the lintel flat arch, and the steel wedge width b is (1 / 2B-15) mm of the lintel width.

[0009] Further, the steel wedge height h is the height H of the lintel flat arch, and the steel wedge width b is (1 / 2B-15) mm of the lintel width.

[0010] The above-mentioned steel wedge, angle steel support and patch plate reinforced masonry structure lintel crack and its construction method, the specific implementation steps are as follows:

[0011] Step one: temporary support for the crack lintel.

[0012] Step two: chisel off the plaster layer on the wall and lintel, and chisel off the horizontal joint mortar of 250 mm long of the angle steel support supporting section.

[0013] Step three: symmetrically punch the steel wedge from both sides of the lintel, after the steel wedge is tightly inserted, cut off the excess steel wedge metal exposed outside the lintel.

[0014] Step four: install the angle steel support on both sides of the lower part of the masonry structure lintel, and smear the cement polymer grouting liquid on the joint surface of the angle steel support and the lower part of the lintel and the wall, with a thickness of 3-5 mm, and fill the chiseled joint with the cement polymer grouting liquid, then embed the angle steel support and press tightly.

[0015] Step five: weld the patch plate and the angle steel support.

[0016] Step six: pressure grouting is carried out on the wall and the crack of the lintel, and the cement polymer grouting liquid is injected, and after 1-2 days of standing, the temporary support is removed.

[0017] Step seven: rust-proof treatment is carried out on the exposed angle steel support and patch plate.

[0018] Beneficial effects:

[0019] The steel wedge, angle steel support and patch plate reinforced masonry structure lintel crack can bear the tensile stress generated by pressure grouting reinforcement, can improve the ductility of the structure, enhance the anti-collapse ability of the structure, at the same time, can save the engineering quantity, save the engineering materials, reduce the engineering cost, and the method is one of the methods with high cost performance for seismic reinforcement of existing masonry structure lintel cracks. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The steel wedge, angle steel support and patch plate reinforced masonry structure lintel crack is shown in the figure.

[0021] Figure 2 A-A sectional view of Figure 1 ;

[0022] Figure 3 B-B sectional view of the steel plate wedge.

[0023] Figure 4 B-B sectional view of the steel plate wedge.

[0024] In the figure, 1: angle steel support; 2: steel plate wedge; 3: patch plate; 4: angle steel support supporting section; 5: wall; 6: lintel flat arch; 7: lintel; 8: crack; 9: wedge mouth; 10: wedge tail. DETAILED DESCRIPTION

[0025] The specific implementation manner of the utility model is as follows:

[0026] A steel plate wedge, angle steel support reinforced masonry structure lintel crack, as shown in Figures 1-4 , its characterized in that: including angle steel support 1, steel plate wedge 2, patch plate 3, the angle steel support 1 of setting in masonry structure lintel 7 crack lower part, the angle steel support 1 in original structure lintel lower part both sides symmetrical setting, the angle steel support 1 both ends along wall 5 each extension 250mm, form angle steel support supporting section 4, and the angle steel support 1 of angle steel support supporting section 4 one flange embeds in wall 5 mortar joint, and the embed depth is the height of flange, the steel plate wedge 2 is by wedge mouth 9 and wedge tail 10 constitutes, and is hit into steel plate wedge 2 to the depth of crack 8 on both sides of lintel 7 symmetry, the patch plate 3 is close to angle steel support 1 arrangement, the patch plate 3 is two, and the arrangement interval is 500mm, is used for connecting the angle steel support 1 of both sides of lintel 7 lower part, the patch plate 3 is welded with angle steel support 1, the angle steel support 1, steel plate wedge 2, patch plate 3 are all installed after being finished, and pour cement polymer grouting fluid in crack 8.

[0027] Further, the angle steel support 1 adopts L50x5 equilateral angle steel.

[0028] Further, the steel plate wedge 2 is Q235B steel plate, the thickness of the wedge mouth 9 is 2mm, and the thickness of the wedge tail 10 is 15mm.

[0029] Further, the height h of the steel plate wedge 2 is the height H of the lintel flat arch 6, and the width b of the steel plate wedge 2 is (1 / 2B-15) mm of the width of the lintel 7.

[0030] Further, the patch plate 3 is Q235B steel plate with a thickness of 5mm and a width of 40mm.

[0031] Further, the cement used in the cement polymer grouting fluid is ordinary portland cement with a strength grade of 42.5, the sand is fine sand with a particle size of ≤0.5 mm, and the water is drinking water or natural clean water.

[0032] The above-mentioned reinforced masonry structure lintel crack using steel wedge and angle steel support and its construction method has the following specific implementation steps:

[0033] Step one: temporarily support the crack lintel 7.

[0034] Step two: chisel off the plaster layer on the wall 5 and the lintel 7, and chisel off the 250 mm long horizontal joint mortar of the angle steel support bearing section 4.

[0035] Step three: symmetrically punch the steel wedge 2 from both sides of the lintel 7, after the steel wedge 2 is tightly inserted, the excess steel wedge 2 metal exposed outside the lintel 7 is cut off.

[0036] Step four: install the angle steel support 1 on both sides of the lower part of the masonry structure lintel 7, apply cement polymer grouting fluid on the joint surface between the angle steel support 1 and the lower part of the lintel 7 and the wall 5, with a thickness of 3-5 mm, and fill the chiseled joint with the cement polymer grouting fluid, then paste the angle steel support 1 and press it tightly.

[0037] Step five: weld the patch plate 3 and the angle steel support 1.

[0038] Step six: pressure grouting is performed on the crack 8 of the wall 5 and the lintel 7, and cement polymer grouting fluid is injected, after 1-2 days of standing, the temporary support is removed.

[0039] Step seven: perform rust-proof treatment on the exposed angle steel support 1 and the patch plate 3.

[0040] 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 method for reinforcing cracks in lintels of masonry structures using steel plate wedges and angle steel supports, characterized in that: The utility model provides a kind of crack repairing structure of masonry structure, including angle steel support (1), steel plate wedge (2), patch plate (3);The angle steel support (1) is arranged in the lower part of masonry structure lintel (7) crack, the angle steel support (1) is symmetrically arranged in the lower part of original structure lintel two sides;The angle steel support (1) two ends are each extended 250mm along wall (5), and form angle steel support support section (4), and the wing of angle steel support (1) of angle steel support support section (4) is embedded in wall (5) mortar joint, and embedding depth is the height of wing;The steel plate wedge (2) is made of wedge mouth (9) and wedge tail (10), and steel plate wedge (2) is punched into the deep place of crack (8) on the both sides of lintel (7) symmetrically;The patch plate (3) is arranged close to angle steel support (1);The patch plate (3) is two, and the arrangement interval is 500mm, for connecting the angle steel support (1) of the lower part of both sides of lintel (7);The patch plate (3) is welded with angle steel support (1);After the angle steel support (1), steel plate wedge (2), patch plate (3) are all installed, cement polymer grouting fluid is injected in crack (8).

2. A reinforced masonry structure lintel crack with steel plate wedge, angle steel support according to claim 1, characterized in that: The angle steel support (1) is made of L50x5 equilateral angle steel.

3. A reinforced masonry structure lintel crack with steel plate wedge, angle steel support according to claim 1, characterized in that: The steel plate wedge (2) is made of Q235B steel plate, and the thickness of wedge mouth (9) is 2mm, and the thickness of wedge tail (10) is 15mm.

4. The reinforced masonry structure lintel crack with steel plate wedge and angle steel support according to claim 1, characterized in that: The height h of steel plate wedge (2) is the height H of lintel flat arch (6), and the width b of steel plate wedge (2) is (1 / 2B-15)mm of the width of lintel (7).

5. A reinforced masonry structure lintel crack with steel plate wedge, angle steel support according to claim 1, characterized in that: The patch plate (3) is made of Q235B steel plate with thickness of 5mm and width of 40mm.

6. A reinforced masonry structure lintel crack with steel plate wedge, angle steel support according to claim 1, characterized in that: The cement polymer grouting fluid uses ordinary portland cement with strength grade of 42.5, fine sand with particle size ≤0.5mm as sand, and drinking water or natural clean water as water.

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