Anti-floating anchor rod and construction method thereof

Abstract

The invention discloses an anti-floating anchor rod and a construction method thereof.The anti-floating anchor rod comprises an anchor rod body, a pressure-bearing protruding head is formed at the lower end of the anchor rod body, the outer diameter of the pressure-bearing protruding head is larger than that of the anchor rod body, and a retaining protruding edge is formed on the outer wall of the anchor rod body; the expansion sleeve is movably arranged outside the anchor rod in a sleeving mode, an elastic inner edge is formed at the upper end of the expansion sleeve, the lower end of the expansion sleeve extends to form a plurality of protective wings, and the protective wings are arranged in the circumferential direction of the expansion sleeve; the pushing pipe is detachably arranged in the middle of the anchor rod in a sleeving mode, the pushing pipe pushes the expansion sleeve to the lower end of the anchor rod and is removed, the retaining protruding edge abuts against the side, away from the pressure-bearing protruding head, of the elastic inner edge in a pressing mode, and the pressure-bearing protruding head extrudes the multiple protection wings so that the multiple protection wings can be bent towards the outer side of the expansion sleeve and can be opened; the anchor rod, the expanded wings and the expansion sleeve are coated with the slurry, so that the anti-floating anchor rod with the expansion head is formed. The anti-floating anchor rod solves the problem that the connection force between the lower end of the steel bar of an existing anti-floating anchor rod and the grouting body of the expanded head part is weak.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to an anti-floating anchor rod and a construction method thereof. Background Art

[0002] In recent years, anti-floating anchors with bottom enlarged heads have appeared, which reduce the anchoring length of the anchor by the pull-out resistance of the enlarged head. However, the reinforcement of the bottom enlarged head is consistent with the upper reinforcement, and is only set in the center. The bearing capacity of the enlarged head cannot be improved by the combined action of the reinforcement and the grouting body, and the pull-out resistance of the enlarged head cannot be fully utilized. Summary of the invention

[0003] In order to overcome the defects of the prior art, an anti-floating anchor rod and a construction method thereof are provided to solve the problem that the connection force between the lower end of the steel bar of the prior anti-floating anchor rod and the grouting body of the enlarged head part is weak.

[0004] In order to achieve the above object, an anti-floating anchor rod is provided, comprising:

[0005] An anchor rod, wherein a pressure-bearing convex head is formed at the lower end of the anchor rod, the outer diameter of the pressure-bearing convex head is larger than the outer diameter of the anchor rod, and a stop-retraction convex ridge is formed on the outer wall of the anchor rod;

[0006] An expansion sleeve is movably sleeved on the outside of the anchor rod, an upper end of the expansion sleeve is formed with an elastic inner edge, and a lower end of the expansion sleeve is extended to form a plurality of wings, and the plurality of wings are arranged along the circumferential direction of the expansion sleeve;

[0007] A push tube is detachably sleeved on the middle part of the anchor rod, the push tube pushes the expansion sleeve to the lower end of the anchor rod and is removed, the stop convex ridge presses against the side of the elastic inner edge away from the pressure-bearing convex head, and the pressure-bearing convex head squeezes the multiple wings to make the multiple wings bend and spread out toward the outside of the expansion sleeve;

[0008] The grout is coated on the anchor rod, the expanded plurality of wings and the expansion sleeve to form an anti-floating anchor rod with an enlarged head.

[0009] Furthermore, the anti-retraction ridges are arranged in a circle along the circumferential direction of the anchor rod.

[0010] Furthermore, the size of the anti-retraction rib is adapted to the size of the elastic inner edge, and the outer diameter of the anti-retraction rib is adapted to the inner diameter of the push tube.

[0011] Furthermore, the outer diameter of the push tube is adapted to the outer diameter of the expansion sleeve.

[0012] Furthermore, the length of the expansion sleeve is adapted to the distance between the stop convex ridge and the pressure-bearing convex head.

[0013] Furthermore, the pressure-bearing boss is coaxially arranged with the anchor rod.

[0014] Furthermore, the outer diameter of the pressure-bearing boss gradually decreases from the middle of the pressure-bearing boss to both ends of the pressure-bearing boss, and the outer diameter of the upper end of the pressure-bearing boss is matched with the outer diameter of the anchor rod.

[0015] The present invention provides a construction method of an anti-floating anchor rod, comprising the following steps:

[0016] Opening an anchor hole in the foundation so that an enlarged hole is formed at the lower end of the anchor hole;

[0017] Lowering the anchor rod into the anchor rod hole so that the lower end of the anchor rod extends into the enlarged hole;

[0018] The push tube pushes the expansion sleeve downward to the lower end of the anchor rod, the stop convex ridge on the anchor rod presses against the side of the elastic inner edge of the expansion sleeve away from the pressure-bearing convex head, and the pressure-bearing convex head squeezes the multiple wings on the expansion sleeve to make the multiple wings bend and spread out toward the outside of the expansion sleeve;

[0019] Removing the jacking tube;

[0020] Grout is poured into the anchor hole, and the grout covers the anchor, the expanded wings and the expansion sleeve to solidify and form an anti-floating anchor with an enlarged head.

[0021] The beneficial effect of the present invention is that the anti-floating anchor rod of the present invention is expanded after the anchor rod is placed in place by arranging an expansion sleeve on the anchor rod, and utilizing the multiple wings on the expansion sleeve after being expanded, so that the anchor rod and the grouting body can be better combined to bear force, thereby improving the connection force between the anchor rod and the grouting, thereby achieving the purpose of fully utilizing the pull-out resistance of the enlarged head part.

[0022] The anti-floating anchor rod of the present invention utilizes an expansion sleeve to realize the expansion of the anchor rod at the enlarged head portion of the anchor rod, so that the anchor rod and the grouting body are jointly stressed to further exert the pull-out resistance of the enlarged head portion, effectively reducing the length of the anti-floating anchor rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0024] Figure 1 It is a schematic structural diagram of an anti-floating anchor rod according to an embodiment of the present invention.

[0025] Figure 2Schematic diagram of the structure of an extension sleeve according to an embodiment of the present invention.

[0026] Figure 3 This is a schematic diagram of a plurality of wings in an open state according to an embodiment of the present invention. DETAILED DESCRIPTION

[0027] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0028] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] Reference Figures 1 to 3 As shown, the present invention provides an anti-floating anchor rod, comprising: an anchor rod 1, an expansion sleeve 2, and a jacking pipe 3.

[0030] In this embodiment, the anchor rod 1 is vertically arranged in the anchor rod hole. A pressure-bearing convex head 11 is formed at the lower end of the anchor rod 1. The outer diameter of the pressure-bearing convex head 11 is larger than the outer diameter of the anchor rod 1.

[0031] As a preferred embodiment, the pressure-bearing boss 11 is coaxially arranged with the anchor rod 1 .

[0032] In this embodiment, the pressure-bearing protrusion is shaped like a spindle. Specifically, the outer diameter of the pressure-bearing protrusion 11 gradually decreases from the middle of the pressure-bearing protrusion 11 to the two ends of the pressure-bearing protrusion 11. The outer diameter of the upper end of the pressure-bearing protrusion 11 is compatible with the outer diameter of the anchor rod 1.

[0033] See also Figure 1 As shown, the upper half of the pressure-bearing protrusion is in the shape of a truncated cone, and the lower half of the pressure-bearing protrusion is in the shape of an inverted cone.

[0034] The outer wall of the anchor rod 1 is formed with a stop rib 12 .

[0035] As a preferred embodiment, the retaining protrusions 12 are arranged in a circle along the circumferential direction of the anchor rod 1 .

[0036] The expansion sleeve 2 is movably sleeved on the outside of the anchor rod 1. The upper end of the expansion sleeve 2 is formed with an elastic inner edge.

[0037] In this embodiment, the size of the retaining rib 12 is adapted to the size of the elastic inner edge.

[0038] A plurality of wings 21 are formed extending from the lower end of the expansion sleeve 2. The plurality of wings 21 are arranged along the circumferential direction of the expansion sleeve 2.

[0039] In this embodiment, the single-piece protective wing is extended along the axial direction of the expansion sleeve. The single-piece protective wing is in an arc shape. Specifically, the expansion sleeve adopts a steel sleeve, and a plurality of slits are cut at one end of the steel sleeve, so that a plurality of protective wings are formed at one end of the steel sleeve. The slits are arranged along the length direction of the steel sleeve.

[0040] As a preferred embodiment, the outer diameter of the stop convex rib 12 is adapted to the inner diameter of the push tube 3. The outer diameter of the push tube 3 is adapted to the outer diameter of the expansion sleeve 2.

[0041] The push tube 3 is detachably sleeved on the middle part of the anchor rod 1. The push tube 3 pushes the expansion sleeve 2 to the lower end of the anchor rod 1 and is removed. The stop convex rib 12 presses against the side of the elastic inner edge away from the pressure-bearing convex head 11. The pressure-bearing convex head 11 squeezes the multiple wings 21 so that the multiple wings 21 are bent toward the outside of the expansion sleeve 2 and spread out.

[0042] In this embodiment, combined with Figure 1 and Figure 3 As shown, the length of the expansion sleeve 2 is adapted to the distance between the retaining rib 12 and the pressure-bearing protrusion 11 .

[0043] The slurry is coated on the anchor rod 1, the expanded plurality of wings 21 and the expansion sleeve 2 to form the anti-floating anchor rod 1 with an enlarged head.

[0044] The present invention provides a construction method of an anti-floating anchor rod, comprising the following steps:

[0045] S1. Open an anchor hole in the foundation so that an enlarged hole is formed at the lower end of the anchor hole.

[0046] S2. Lower the anchor rod 1 into the anchor rod 1 hole so that the lower end of the anchor rod 1 extends into the enlarged hole.

[0047] S3, the pushing tube 3 pushes the expansion sleeve 2 downward to the lower end of the anchor rod 1, and the stop rib 12 on the anchor rod 1 presses against the side of the elastic inner edge of the expansion sleeve 2 away from the pressure-bearing protrusion 11, and the pressure-bearing protrusion 11 squeezes the multiple wings 21 on the expansion sleeve 2 so that the multiple wings 21 are bent and stretched toward the outside of the expansion sleeve 2.

[0048] S4. Remove the push tube 3.

[0049] S5. Grout is poured into the hole of the anchor rod 1. The grout covers the anchor rod 1, the expanded multiple wings 21 and the expansion sleeve 2 to solidify and form an anti-floating anchor rod 1 with an enlarged head.

[0050] The anti-floating anchor rod of the present invention is provided with an expansion sleeve on the anchor rod, and is expanded after the anchor rod is placed in place. The multiple wings on the expansion sleeve are expanded, so that the anchor rod and the grouting body are better combined to bear force, thereby achieving the purpose of fully exerting the pull-out resistance of the enlarged head part.

[0051] The anti-floating anchor rod of the present invention is set to have corresponding dimensions according to the anchor rod diameter and the end enlarged head dimensions required by the anti-floating anchor rod design.

[0052] The pulling force of the expansion sleeve is transmitted to the anchor rod. The lower part thereof is a plurality of deployable wings, which are deployed under the joint action of the jacking tube and the pressure-bearing convex head.

[0053] The pressure-bearing protrusion can split and unfold multiple wings.

[0054] The push tube is used to push the expansion sleeve to a position between the stop convex ridge and the pressure-bearing convex head, and then it is pulled out and removed for recycling.

[0055] The stop convex ribs can limit the expansion sleeve from retracting after the wings are deployed and transmit the pull-out resistance to the anchor rod.

[0056] The anti-floating anchor rod of the present invention can be unfolded at the bottom enlarged head portion, so that the anchor rod and the grouting body (slurry) are jointly stressed, giving full play to the pull-out resistance of the enlarged head portion, and effectively reducing the anchor rod length under the condition of maintaining the pull-out bearing capacity of the anchor rod.

[0057] During the construction of the anti-floating anchor rod of the present invention, after drilling and expanding the hole in the soil on site, the anchor rod and the expansion sleeve are placed in the hole and positioned. The expansion sleeve is then pushed to the designed position using a jacking pipe, at which time the expansion sleeve is fully unfolded, and there are stop convex ridges to limit its retraction. After the jacking pipe is pulled out, the anti-floating anchor rod is grouting and pouring. After the grouting body is cured and reaches the strength, the anchor rod and the grouting body are jointly stressed to further exert the pull-out resistance of the enlarged head.

[0058] The anti-floating anchor rod of the present invention utilizes an expansion sleeve to realize the expansion of the anchor rod at the enlarged head portion of the anchor rod, so that the anchor rod and the grouting body are jointly stressed to further exert the pull-out resistance of the enlarged head portion, effectively reducing the length of the anti-floating anchor rod.

[0059] The enlarged head portion of the anti-floating anchor rod of the present invention has better pull-out resistance.

[0060] The anti-floating anchor rod of the present invention can reduce the length of the anchor rod and has certain economy.

[0061] The anti-floating anchor rod of the present invention is easy to operate and popularize.

[0062] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. An anti-floating anchor, characterized in that: include: An anchor rod, wherein a pressure-bearing convex head is formed at the lower end of the anchor rod, the outer diameter of the pressure-bearing convex head is larger than the outer diameter of the anchor rod, and a stop-retraction convex ridge is formed on the outer wall of the anchor rod; An expansion sleeve is movably sleeved on the outside of the anchor rod, an upper end of the expansion sleeve is formed with an elastic inner edge, and a lower end of the expansion sleeve is extended to form a plurality of wings, and the plurality of wings are arranged along the circumferential direction of the expansion sleeve; A push tube is detachably sleeved on the middle part of the anchor rod, the push tube pushes the expansion sleeve to the lower end of the anchor rod and is removed, the stop convex ridge presses against the side of the elastic inner edge away from the pressure-bearing convex head, and the pressure-bearing convex head squeezes the multiple wings to make the multiple wings bend and spread out toward the outside of the expansion sleeve; The grout is coated on the anchor rod, the expanded plurality of wings and the expansion sleeve to form an anti-floating anchor rod with an enlarged head.

2. The anti-floating anchor rod according to claim 1, characterized in that: The anti-retraction ridges are arranged in a circle along the circumferential direction of the anchor rod.

3. The anti-floating anchor rod according to claim 2, characterized in that: The size of the anti-retraction rib is adapted to the size of the elastic inner edge, and the outer diameter of the anti-retraction rib is adapted to the inner diameter of the push tube.

4. The anti-floating anchor rod according to claim 3, characterized in that: The outer diameter of the push tube is adapted to the outer diameter of the expansion sleeve.

5. The anti-floating anchor rod according to claim 1, characterized in that: The length of the expansion sleeve is adapted to the distance between the stop convex ridge and the pressure-bearing convex head.

6. The anti-floating anchor rod according to claim 1, characterized in that: The pressure-bearing protrusion is coaxially arranged with the anchor rod.

7. The anti-floating anchor rod according to claim 6, characterized in that: The outer diameter of the pressure-bearing protrusion gradually decreases from the middle of the pressure-bearing protrusion to the two ends of the pressure-bearing protrusion, and the outer diameter of the upper end of the pressure-bearing protrusion is matched with the outer diameter of the anchor rod.

8. A construction method for an anti-floating anchor as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: Opening an anchor hole in the foundation so that an enlarged hole is formed at the lower end of the anchor hole; Lowering the anchor rod into the anchor rod hole so that the lower end of the anchor rod extends into the enlarged hole; The push tube pushes the expansion sleeve downward to the lower end of the anchor rod, the stop convex ridge on the anchor rod presses against the side of the elastic inner edge of the expansion sleeve away from the pressure-bearing convex head, and the pressure-bearing convex head squeezes the multiple wings on the expansion sleeve to make the multiple wings bend and spread out toward the outside of the expansion sleeve; Removing the jacking tube; Grout is poured into the anchor hole, and the grout covers the anchor, the expanded wings and the expansion sleeve to solidify and form an anti-floating anchor with an enlarged head.

Images