Low-height prefabricated anti-sill anchorage connection system

Abstract

This utility model discloses a low-height precast inverted curb anchoring connection system, including a beam. The system is characterized by: a groove on the beam into which an anchor head is inserted; a pad layer on the beam; a small inverted curb on the pad layer; a groove formed within the small inverted curb; the groove being located on the anchor head; and a grouting fixing layer filled into the groove, flush with the small inverted curb. This utility model solves the problem that the inverted curb height and the insertion depth of the reinforcing bars cannot meet the specifications, easily leading to anchoring failure and weak shear resistance. By using a threaded anchor head, the mechanical interlocking force at the end is enhanced, compensating for insufficient anchoring length and achieving high pull-out resistance at short anchoring depths.

Description

Technical Field

[0001] This utility model relates to the field of prefabricated structural components, specifically a low-height prefabricated anti-sill anchoring connection system. Background Technology

[0002] Traditional low-height retaining walls (≤250mm) often use a single row of reinforcing bars for connection, but the following problems exist: Insufficient anchorage length: Due to the height of the retaining wall, the embedding depth of the reinforcing bars cannot meet the specifications, which can easily lead to anchorage failure. The shear resistance is weak, and the joint surface of the grouting hole sidewall is prone to slippage under shear force, which can cause structural safety hazards. Utility Model Content

[0003] The purpose of this invention is to provide a low-height prefabricated anti-sill anchoring connection system. By using a threaded anchor head, the mechanical interlocking force at the end is enhanced, compensating for the problem of insufficient anchoring length and achieving high pull-out resistance at short anchoring depths.

[0004] This utility model provides the following technical solution: a low-height prefabricated anti-sill anchoring connection system, including a beam, a groove is provided on the beam, an anchor head is inserted into the groove, a pad layer is laid on the beam, a small anti-sill is laid on the pad layer, a groove is formed in the small anti-sill, the groove is opened on the anchor head, a grouting fixing layer is filled in the groove, and the grouting fixing layer is flush with the small anti-sill.

[0005] In one embodiment, the groove is an inverted cone shape, which increases the pull-out force of the grout fixing layer.

[0006] In one embodiment, an annular groove is formed on the inner wall of the groove, and grout is injected into the annular groove, which improves the connection strength between the grout fixing layer and the small countersunk wall.

[0007] Furthermore, the anchor head is wrapped with reinforcing bars to further enhance the connection strength between the anchor head and the grouting fixing layer.

[0008] Furthermore, the anchor head is a bolt anchor head, which is connected to the bolt head through the thread on the surface of the bolt head.

[0009] Furthermore, both the cushion layer and the grouting fixing layer are Class II grouting materials, and the grouting material is C60.

[0010] Compared with the prior art, the beneficial effects achieved by this utility model are:

[0011] (1) By using a threaded anchor head, the mechanical interlocking force at the end is enhanced, which compensates for the problem of insufficient anchorage length and achieves high pull-out resistance under short anchorage depth.

[0012] (2) The use of inverted conical grouting holes enhances the frictional interlocking between the grout and the hole wall, thereby improving the shear bearing capacity. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0014] Figure 1 This is a cross-sectional view of the low-height prefabricated anti-sill anchoring connection system of this utility model;

[0015] Figure 2 This is a cross-sectional view of Embodiment 2 of this utility model;

[0016] In the diagram: 1. Beam; 11. Groove; 2. Subbase; 3. Small curb; 31. Groove; 32. Annular groove; 4. Anchor head; 5. Grouting fixing layer. Detailed Implementation

[0017] 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.

[0018] Example 1

[0019] Please see Figure 1 This utility model provides a technical solution: a low-height precast anti-reverse curb anchoring connection system, including a beam 1, a groove 11 on the beam 1, an anchor head 4 inserted into the groove 11, the anchor head 4 including a 14mm diameter HRB400 grade reinforcing bar and a 35mm diameter anchor head, a pad layer 2 is laid on the beam 1, the pad layer is a 20mm leveling layer, used to accommodate the installation of a small anti-reverse curb 3, the small anti-reverse curb 3 is laid on the pad layer 2, the small anti-reverse curb 3 has a groove 31 formed in the small anti-reverse curb 3, the groove 31 is opened on the anchor head 4, the groove 31 is filled with a grouting fixing layer 5, the grouting fixing layer 5 is flush with the small anti-reverse curb 3, the grouting fixing layer 5 and the anchor head 4 enhance the shear force between the grouting fixing layer 5 and the anchor head 4.

[0020] Installation process: During installation, the small inverted retaining wall 3 is hoisted onto the foundation layer 2, the anchor head is precisely inserted into the pre-embedded steel bars of the lower structure, and C60 Class II grout is injected from the bottom of the inverted cone hole until grout comes out of the overflow port.

[0021] The groove 31 is an inverted cone shape with an upper opening of 70mm and a lower opening of 50mm. The traditional cylindrical grouting hole is changed to an inverted cone structure that is wider at the top and narrower at the bottom. The geometric shape enhances the frictional interlocking between the grout and the hole wall, thereby improving the shear bearing capacity.

[0022] The anchor head 4 is tied with steel bars. The area of ​​the anchor head is ≥ 4.5 times the area of ​​the steel bars, and the thickness is ≥ the diameter of the steel bars. The anchor head can be made of bolts for easy production and installation.

[0023] Anchor head 4 is a bolt anchor head. The threaded end on the surface of anchor head 4 increases the mechanical biting force at the end to compensate for the problem of insufficient anchoring length.

[0024] Both the cushion layer 2 and the grouting fixing layer 5 are Class II grouting materials. The grouting material is C60 Class II micro-expansion cement-based grouting material to ensure fluidity and strength. Due to the low height, grouting is considered to be done from the top and properly vibrated to avoid air bubbles remaining in the holes.

[0025] Example 2

[0026] like Figure 2 As shown, in this embodiment, by injecting mortar into the annular groove 32, the connection strength between the grouting fixing layer 5 and the small countersunk wall 3 is enhanced, and the insertion and extraction force is increased.

[0027] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A low-height precast counter-cant anchoring connection system comprising a beam, characterized in that: The beam has a groove, into which an anchor head is inserted. A pad layer is laid on the beam, and a small curb is laid on the pad layer. A groove is formed in the small curb, which is located on the anchor head. A grouting fixing layer is filled into the groove, and the grouting fixing layer is flush with the small curb.

2. The low-height prefabricated anti-sill anchoring connection system according to claim 1, characterized in that: The groove is inverted conical in shape.

3. The low-height prefabricated anti-sill anchoring connection system according to claim 1, characterized in that: The inner wall of the groove is formed with an annular groove.

4. The low-height prefabricated anti-sill anchoring connection system according to claim 1, characterized in that: The anchor head is wrapped with steel bars.

5. The low-height prefabricated anti-sill anchoring connection system according to claim 1, characterized in that: The anchor head is a bolt anchor head.

6. The low-height prefabricated anti-sill anchoring connection system according to claim 1, characterized in that: Both the cushion layer and the grouting fixing layer are Class II grouting materials, and the grouting material is C60.

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