Post-tensioning device for building renovation works

Abstract

The new type provides a building reconstruction engineering back anchoring device, including outer wall body and U type anchor ring preburied in outer wall body, both ends of U type anchor ring expose the outer wall body, the both ends of U type anchor ring are laid on the through laying interconnection baffle, the through hole is arranged at the through of baffle and U type anchor ring, and the grouting anchor rod is anchored in the through hole.The grouting anchor rod includes rod body, grout stop cover, nut and grouting cylinder;The grout stop cover covers the end head of grouting cylinder and is used for plugging the grouting cylinder, the rod body extends to the grouting cylinder through the grout stop cover, and the rod body and the grout stop cover are locked by the nut;The grout stop cover is provided with grouting pipeline for injecting grout into the grouting cylinder, and the grouting pipeline is provided with piston for plugging the grouting pipeline.The new type is suitable for existing building outer wall reinforcement, a plurality of baffle hinged connections are connected, the wall body is preburied with U type anchor ring, and the grouting anchor rod is filled with grout through the grouting cylinder, the grout forms a whole with the wall body after solidification, and the outer wall is integrally reinforced.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, specifically to a rear anchoring device for building renovation projects. Background Technology

[0002] External wall reinforcement is a common requirement in building renovation projects, especially for old buildings, historical buildings, or buildings requiring improved seismic performance. Traditional external wall reinforcement methods mainly include the following: 1. Traditional anchoring techniques (chemical anchors, expansion bolts, etc.). Problems: Relies on the strength of the base material; insufficient anchoring force in old or loose walls (such as hollow bricks, masonry structures); drilling easily leads to wall cracking, affecting the overall structural integrity; poor seismic performance, prone to loosening or pull-out under long-term loads. 2. Steel cladding reinforcement method: Welding a steel frame to the outside of the wall, then pouring concrete or plastering for reinforcement. Problems: Complex construction, affecting the building's appearance; increasing the structural weight, potentially affecting the original foundation's bearing capacity. 3. Carbon fiber reinforced polymer (CFRP) reinforcement: Bonding carbon fiber fabric to the outside of the wall to improve tensile strength. Problems: Only suitable for tensile reinforcement, unable to provide sufficient shear and pull-out resistance; prone to aging under long-term exposure, limiting durability. Based on the above problems, this solution proposes a post-anchoring device that combines a U-shaped anchor ring, grouting anchor rod, and adjustable baffle design to improve anchoring strength, construction convenience, and seismic performance. It is suitable for various external wall reinforcement and renovation projects. Utility Model Content

[0003] In view of the problems in the prior art, this utility model proposes a rear anchoring device for building renovation projects.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] The post-anchoring device for building renovation projects includes an outer wall and a U-shaped anchor ring embedded in the outer wall. Both ends of the U-shaped anchor ring protrude from the outer wall. Interconnected baffles are laid through both ends of the U-shaped anchor ring. A through hole is provided at the intersection of the baffle and the U-shaped anchor ring, and a grouting anchor rod is anchored in the through hole.

[0006] Furthermore, the grouting anchor includes a rod body, a grout stop cover plate, a nut, and a grouting cylinder; the grout stop cover plate covers the end of the grouting cylinder to seal the grouting cylinder, the rod body extends through the grout stop cover plate into the grouting cylinder, and the rod body and the grout stop cover plate are locked together by a nut; the grout stop cover plate is provided with a grouting pipe for injecting grout into the grouting cylinder, and the grouting pipe is provided with a piston for sealing the grouting pipe.

[0007] Furthermore, two steel rods are provided on both sides of the grouting cylinder.

[0008] Furthermore, an expansion device is installed at the tail of the grouting anchor, which includes an expansion block and an expansion body; the expansion body is installed on the outer wall of the grouting cylinder, and the expansion block is installed at the bottom of the outer wall of the grouting cylinder.

[0009] Furthermore, the baffle has multiple sections, and adjacent baffles are connected by hinges.

[0010] Furthermore, the grouting anchor bolt is 10-15cm long.

[0011] Furthermore, the spacing between adjacent grouting anchors is 20-25cm.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model is applicable to the reinforcement of the exterior walls of existing buildings. It uses multiple baffles to be hinged together, and U-shaped anchor rings are pre-embedded in the wall. In conjunction with grouting anchor rods, grout is injected through a grouting cylinder. After the grout solidifies, it forms an integral whole with the wall, thus forming an overall reinforcement of the exterior wall. The surface is flat after reinforcement, and the reinforced surface forms an integral whole. The grouting anchor rods inject grout through the grouting cylinder. After the grout solidifies, it forms an integral whole with the wall, significantly improving the pull-out resistance. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the specific structure of the grouting anchor bolt of this utility model;

[0016] Figure 3 This is a schematic diagram of the connection structure of multiple baffles in an embodiment of this utility model;

[0017] Figure 4 This is a front view schematic diagram of the structure of multiple baffles connected in this utility model.

[0018] The diagram is labeled as follows: 100 - exterior wall; 1 - baffle; 2 - grouting anchor; 3 - U-shaped anchor ring; 20 - rod body; 21 - grout stop cover plate; 22 - nut; 23 - piston; 24 - grouting pipe; 25 - grouting cylinder; 26 - expansion block; 27 - expansion body; 101 - hinge. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Example 1

[0021] like Figure 1-4 As shown, this embodiment provides a post-anchoring device for building renovation projects, including an outer wall 100 and a U-shaped anchor ring 3 pre-embedded in the outer wall. Both ends of the U-shaped anchor ring 3 protrude from the outer wall 100. Interconnected baffles 1 are laid through the two ends of the U-shaped anchor ring 3. A through hole is provided at the through-hole between the baffle 1 and the U-shaped anchor ring 3, and a grouting anchor rod 2 is anchored in the through hole.

[0022] See you later Figure 2 The grouting anchor 2 includes a rod body 20, a grout stop cover plate 21, a nut 22, and a grouting cylinder 25. The grout stop cover plate 21 covers the end of the grouting cylinder 25 to seal the grouting cylinder 25. The rod body 20 extends through the grout stop cover plate 21 into the grouting cylinder 25. The rod body 20 and the grout stop cover plate 21 are locked together by the nut 22. The grout stop cover plate 21 is provided with a grouting pipe 24 for injecting grout into the grouting cylinder 25. The grouting pipe 24 is provided with a piston 23 for sealing the grouting pipe 24.

[0023] Two steel rods are provided on both sides of the grouting cylinder 25.

[0024] An expansion device is installed at the tail of the grouting anchor 2, which includes an expansion block 26 and an expansion body 27; the expansion body 27 is installed on the outer wall of the grouting cylinder 25, and the expansion block 26 is installed at the bottom of the outer wall of the grouting cylinder 25.

[0025] The baffle 1 has multiple pieces, and adjacent baffles 1 are connected by hinges 101.

[0026] The grouting anchor 2 is 10-15cm in length.

[0027] The spacing between adjacent grouting anchor rods 2 is 20-25cm.

[0028] U-shaped anchor ring 3 is pre-embedded in the outer wall 100, with both ends exposed, for connecting baffle 1 and grouting anchor 2.

[0029] The baffle 1 covers both ends of the U-shaped anchor ring 3 and is anchored by the grouting anchor rod 2.

[0030] The grouting anchor rod 2 penetrates the baffle 1 and the U-shaped anchor ring 3, and injects high-strength grout into the wall through the grouting cylinder 25, forming an integral anchoring structure after curing.

[0031] After grouting is completed, the expansion device further tightens the anchor bolts to improve pull-out resistance.

[0032] The reinforcement process is as follows:

[0033] Step 1: Embed the U-shaped anchor ring 3 within the outer wall 100, with both ends exposed.

[0034] Step 2: Lay the baffle 1 and pass it through both ends of the U-shaped anchor ring 3.

[0035] Step 3: Install the grouting anchor 2, and inject grout through the grouting pipe 24 to fill the grouting cylinder 25 and the surrounding gaps.

[0036] Step 4: After the slurry solidifies, the expansion device is further tightened to form a high-strength anchoring node.

[0037] This new type of reinforcement is applicable to the external wall reinforcement of existing buildings. It uses multiple baffles connected by hinges, and U-shaped anchor rings are pre-embedded in the wall. In conjunction with grouting anchors, grout is injected through a grouting cylinder. After the grout cures, it forms an integral whole with the wall, thus providing overall reinforcement to the external wall. The reinforced surface is flat and the reinforced surface forms an integral whole. The grouting anchors inject grout through the grouting cylinder, and after the grout cures, it forms an integral whole with the wall, significantly improving pull-out resistance.

[0038] The above description is merely an illustrative example of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of this utility model or exceed the scope defined in the claims, all of which should fall within the protection scope of this utility model.

Claims

1. A post-anchoring device for building renovation projects, comprising an exterior wall (100) and a U-shaped anchor ring (3) pre-embedded in the exterior wall, characterized in that, The two ends of the U-shaped anchor ring (3) are exposed on the outer wall (100). Interconnected baffles (1) are laid through the two ends of the U-shaped anchor ring (3). A through hole is provided at the through point where the baffle (1) and the U-shaped anchor ring (3) pass through, and the grouting anchor rod (2) is anchored in the through hole.

2. The post-anchoring device for building renovation projects according to claim 1, characterized in that, The grouting anchor (2) includes a rod body (20), a grout stop cover plate (21), a nut (22), and a grouting cylinder (25); the grout stop cover plate (21) covers the end of the grouting cylinder (25) to seal the grouting cylinder (25), the rod body (20) extends through the grout stop cover plate (21) into the grouting cylinder (25), and the rod body (20) and the grout stop cover plate (21) are locked together by the nut (22); the grout stop cover plate (21) is provided with a grouting pipe (24) for injecting grout into the grouting cylinder (25), and the grouting pipe (24) is provided with a piston (23) for sealing the grouting pipe (24).

3. The post-anchoring device for building renovation projects according to claim 2, characterized in that, Two steel rods are provided on both sides of the grouting cylinder (25).

4. The post-anchoring device for building renovation projects according to claim 2, characterized in that, An expansion device is installed at the tail of the grouting anchor (2), which includes an expansion block (26) and an expansion body (27); the expansion body (27) is installed on the outer wall of the grouting cylinder (25), and the expansion block (26) is installed at the bottom of the outer wall of the grouting cylinder (25).

5. The post-anchoring device for building renovation projects according to claim 1, characterized in that, The baffle (1) has multiple pieces, and adjacent baffles (1) are connected by hinges (101).

6. The post-anchoring device for building renovation projects according to claim 1, characterized in that, The grouting anchor (2) is 10-15cm long.

7. The post-anchoring device for building renovation projects according to claim 1, characterized in that, The spacing between adjacent grouting anchors (2) is 20-25cm.

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