Prestressed nail structure for masonry reinforcement

Abstract

The present invention discloses a prestressed nail structure for masonry reinforcement, which includes a right-handed wall nail and a left-handed wall nail. They are both formed into a right-angled shape by a first section and a second section. The free ends of the first sections of the right-handed wall nail and the left-handed wall nail are respectively provided with a right-handed external thread and a left-handed external thread. The two ends of the hole of a fastening sleeve are respectively provided with a right-handed internal thread adapted to the right-handed external thread and a left-handed internal thread adapted to the left-handed external thread. Nuts are respectively threadedly connected to the middle parts of the second sections of the right-handed wall nail and the left-handed wall nail. The free ends of the second sections of the right-handed wall nail and the left-handed wall nail gradually increase in diameter to form a tapered head. Washers and expansion sleeves are respectively sleeved on the right-handed wall nail and the left-handed wall nail between the nuts and the tapered heads. A strip-shaped groove is provided along the length direction at the end of the expansion sleeve facing the tapered head, and the strip-shaped groove extends to the free end of the expansion sleeve. The inner diameter of the expansion sleeve is consistent with the outer diameter of the middle section of the tapered head. The right-handed wall nail section and the left-handed wall nail section with the expansion sleeves are respectively located in the holes drilled in adjacent masonries, and the fastening sleeve is located on the wall surface; this structure can reliably reinforce the masonry.

Description

Technical Field

[0001] The present invention relates to the technical field of masonry reinforcement in civil engineering, and particularly relates to a prestressed nail structure for masonry reinforcement. Background Art

[0002] Masonry structures are one of the most common and oldest structural forms in construction engineering. However, despite their long history, the related reinforcement means are still not perfect. There are relatively large limitations, especially in the protection of ancient buildings and ethnic buildings, mainly reflected in that the existing reinforcement means generally have relatively large modifications to the existing components of the original building, and some reinforcements even require the demolition of the original structure, thus seriously damaging the original ecology and style of the building; while the reinforcement methods with less impact on the building style currently have the problem of limited performance improvement. To solve the above problems, it is particularly necessary to provide a reinforcement device that will not have a great impact on the original building style and can effectively improve the performance of the masonry structure. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a prestressed nail structure for masonry reinforcement, which can avoid having a great impact on the original building style and can effectively improve the structural performance of the original building, thereby overcoming the deficiencies of the prior art.

[0004] The purpose of the present invention is achieved through the following technical solutions:

[0005] The prestressed nail structure for masonry reinforcement includes a right-handed wall nail and a left-handed wall nail. Both the right-handed wall nail and the left-handed wall nail are formed into a right-angled shape by a first section and a second section. The free ends of the first sections of the right-handed wall nail and the left-handed wall nail are respectively provided with a right-handed external thread and a left-handed external thread. The two ends of the hole of a fastening sleeve are respectively provided with a right-handed internal thread adapted to the right-handed external thread and a left-handed internal thread adapted to the left-handed external thread. Nuts are respectively threadedly connected to the middle parts of the second sections of the right-handed wall nail and the left-handed wall nail. The free ends of the second sections of the right-handed wall nail and the left-handed wall nail gradually increase in diameter to form a tapered head. Gaskets and expansion sleeves are respectively sleeved on the right-handed wall nail and the left-handed wall nail between the nuts and the tapered heads in sequence. The end of the expansion sleeve facing the tapered head is provided with a strip-shaped groove along its length direction, and the strip-shaped groove extends to the free end of the expansion sleeve. The inner diameter of the expansion sleeve is consistent with the outer diameter of the middle section of the tapered head. The sections of the right-handed wall nail and the left-handed wall nail with the expansion sleeves are respectively located in the holes drilled in adjacent masonries, and the fastening sleeve is located on the wall surface.

[0006] Further, the sections of the right-handed wall nail and the left-handed wall nail with the expansion sleeves are respectively located in the holes drilled in the upper and lower adjacent masonries, and the upper masonry and the two nail structures on the two masonries below it form an "eight" shape.

[0007] Further, a polygonal rotating fastener is fixedly sleeved on the fastening sleeve.

[0008] Further, there are four strip-shaped grooves which are evenly arranged in the circumferential direction of the expansion sleeve.

[0009] Furthermore, the ends of the strip-shaped grooves located in the middle of the expansion sleeve are arc-shaped.

[0010] Still further, the washers on the positive rotation wall nails and the reverse rotation wall nails between the nut and the expansion sleeve are a spring washer and a flat washer in sequence.

[0011] The beneficial effects of the present invention are as follows:

[0012] The beneficial effects of the prestressed pull nail structure for masonry reinforcement of the present invention are as follows: a. It can directly realize reinforcement on the surface of the original structure, thus avoiding the demolition and damage of the original building structure; b. The pull nail is small in volume, and the reinforcement surface can be freely selected during reinforcement, without causing a large change to the original building style; c. The pull nail can apply prestress to the structure, which can further improve the overall performance of the structure after reinforcement; d. The structure of the present invention is simple, the construction is convenient, and the material cost is low, which can effectively reduce the labor and material costs and improve the construction speed.

[0013] Other advantages, objectives and features of the present invention will be described to some extent in the subsequent description, and to some extent, they will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the drawings, where:

[0015] Figure 1 is the structural schematic diagram of the present invention.

[0016] Figure 2 is the usage state diagram of the present invention.

[0017] Figure 3 is Figure 2 the A-A cross-sectional view during the masonry reinforcement process in

[0018] Figure 4 is Figure 2 the A-A cross-sectional view after the masonry is reinforced in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following will refer to the drawings to describe the preferred embodiments of the present invention in detail. It should be understood that the preferred embodiments are only for explaining the present invention, rather than for limiting the protection scope of the present invention.

[0020] As Figure 1As shown in the figure, a prestressed wall nail structure for masonry reinforcement. The masonry 6 of the present invention is preferably the masonry 6 of an existing wall, that is, the wall is a structure built with masonry 6 and mortar 10, or a structure built with dry-laid masonry 6. It includes a right-handed wall nail 1 and a left-handed wall nail 2. Both the right-handed wall nail 1 and the left-handed wall nail 2 are formed into a right angle by a first section and a second section. The right-handed wall nail 1 and the left-handed wall nail 2 are circular in cross-section. The free ends of the first sections of the right-handed wall nail 1 and the left-handed wall nail 2 are respectively provided with a right-handed external thread and a left-handed external thread. The two ends of the hole of a fastening sleeve 3 are respectively provided with a right-handed internal thread adapted to the right-handed external thread and a left-handed internal thread adapted to the left-handed external thread. Nuts 4 are respectively threadedly connected to the middle parts of the second sections of the right-handed wall nail 1 and the left-handed wall nail 2. The free ends of the second sections of the right-handed wall nail 1 and the left-handed wall nail 2 gradually increase in diameter to form tapered heads 14. Washers 12, flat washers 13 and expansion sleeves 5 are respectively sleeved on the right-handed wall nail 1 and the left-handed wall nail 2 between the nuts 4 and the tapered heads 14 in sequence. A strip-shaped groove is provided along the length direction on the end of the expansion sleeve 5 facing the tapered head, and the strip-shaped groove extends to the free end of the expansion sleeve 5. The inner diameter of the expansion sleeve 5 is the same as the outer diameter of the middle section of the tapered head 14. The right-handed wall nail 1 and the left-handed wall nail 2 with the expansion sleeves 5 are respectively located in the holes drilled in adjacent masonry 6. The fastening sleeve 3 is located on the wall surface; when the wall nail structure is used for reinforcement, holes are respectively drilled in adjacent masonry. The holes are perpendicular to the wall surface. The hole diameter is the same as the outer diameter of the large end of the tapered head, and the depth is equal to the length of the expansion sleeve when not deformed plus the length of the tapered head outside the expansion sleeve. After the holes are drilled, the right-handed wall nail section and the left-handed wall nail section with the expansion sleeves are respectively forced into the two holes, and then the nuts are rotated to make the right-handed wall nail and the left-handed wall nail move towards the hole mouth direction. At this time, the expansion sleeve expands. When the expansion reaches the maximum limit, the nut cannot be rotated. At this time, the fastening sleeve is rotated to make the free ends of the first sections of the right-handed wall nail and the left-handed wall nail approach each other to complete the reinforcement. By setting the expansion sleeve, the wall nail structure can apply prestress to the structure, which can improve the overall performance of the structure after reinforcement. By setting the washer, prestress can be further applied to the structure, which can further improve the overall performance of the structure after reinforcement.

[0021] The right-handed wall nail 1 section and the left-handed wall nail 2 section with the expansion sleeve 5 are respectively located in the holes drilled in the upper and lower adjacent masonry 6. The upper masonry 6 and the two wall nail structures 7 on the two masonry 6 below it form an "eight" shape. Such an arrangement of the wall nail structure makes the reinforcement effect better.

[0022] A polygonal rotating fastener 11 is fixedly sleeved on the fastening sleeve 3. Preferably, the rotating fastener 11 is welded to the fastening sleeve 3. The fastening sleeve can be conveniently rotated by rotating the polygonal rotating fastener.

[0023] There are four strip-shaped grooves and they are evenly arranged in the circumferential direction of the expansion sleeve 5. Of course, there can also be six, eight, etc.

[0024] The end of the strip groove located in the middle of the expansion sleeve 5 is arc-shaped, which can avoid tearing of the expansion sleeve. The material of the expansion sleeve is preferably stainless steel.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the present technical solution, and they should all be covered within the scope of the claims of the present invention.

Claims

1. Prestressed draw nails structure for masonry reinforcement, characterized in that: It includes a right-handed wall nail (1) and a left-handed wall nail (2). Both the right-handed wall nail (1) and the left-handed wall nail (2) are formed into a right-angled shape by a first section and a second section. The free ends of the first sections of the right-handed wall nail (1) and the left-handed wall nail (2) are respectively provided with a right-handed external thread and a left-handed external thread. The two ends of the hole of a fastening sleeve (3) are respectively provided with a right-handed internal thread adapted to the right-handed external thread and a left-handed internal thread adapted to the left-handed external thread. Nuts (4) are respectively threadedly connected to the middle parts of the second sections of the right-handed wall nail (1) and the left-handed wall nail (2). The free ends of the second sections of the right-handed wall nail (1) and the left-handed wall nail (2) have diameters that gradually increase to form a tapered head (14). Washers and expansion sleeves (5) are respectively sleeved on the right-handed wall nail (1) and the left-handed wall nail (2) between the nut (4) and the tapered head (14). A strip-shaped groove is provided along the length direction on the end of the expansion sleeve (5) facing the tapered head, and the strip-shaped groove extends to the free end of the expansion sleeve (5). The inner diameter of the expansion sleeve (5) is the same as the outer diameter of the middle section of the tapered head (14). The right-handed wall nail (1) and the left-handed wall nail (2) with the expansion sleeve (5) are respectively located in the holes drilled in adjacent masonry units (6), and the fastening sleeve (3) is located on the wall surface; The washers on the right-handed wall nail (1) and the left-handed wall nail (2) between the nut (4) and the expansion sleeve (5) are a spring washer (12) and a flat washer (13) in sequence.

2. The prestressed nail structure for masonry reinforcement according to claim 1, characterized in that: The section of the right-handed wall nail (1) and the section of the left-handed wall nail (2) with the expansion sleeve (5) are respectively located in the holes drilled in the upper and lower adjacent masonry units (6). The upper masonry unit (6) and the two nail structures (7) on its lower two masonry units (6) form an "eight" shape.

3. The prestressed nail structure for masonry reinforcement according to claim 1 or 2, characterized in that: A polygonal rotating fastener (11) is fixedly sleeved on the fastening sleeve (3).

4. The prestressed nail structure for masonry reinforcement according to claim 1 or 2, characterized in that: There are four strip-shaped grooves and they are evenly arranged in the circumferential direction of the expansion sleeve (5).

5. The prestressed nail structure for masonry reinforcement according to claim 4, characterized in that: The end of the strip-shaped groove in the middle of the expansion sleeve (5) is arc-shaped.

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