Soft soil stratum grouting anchoring device

Abstract

The utility model discloses a soft soil stratum grouting anchoring device which comprises an anchor rod and a round head rod, the longitudinal section of the anchor rod and the round head rod is T-shaped and is of a hollow structure, the bottom end of the anchor rod is conical, a plurality of anchor rod grouting holes are formed in the conical bottom end of the anchor rod, a plurality of telescopic openings are formed in the outer wall of the anchor rod, and the telescopic openings are communicated with the anchor rod grouting holes. A barb is connected to each telescopic opening through a rotating shaft, a vertical rod of the round-head rod can be inserted into a cavity of the anchor rod, the barbs can rotate around the rotating shaft under the pushing of the round-head rod, pass through the telescopic openings in the cavity of the anchor rod and then are located on the outer side and the inner side of a rod body of the anchor rod, and gaps between the barbs and the telescopic openings serve as channels for slurry to overflow; a plurality of round head rod grouting holes are formed in the rod wall of the round head rod. The anchor rod barbs stretch out to penetrate into the stratum to improve the pulling resistance, installation is fast, the effect is remarkable, and the anchoring effect is good.

Description

Technical Field

[0001] The utility model relates to an anchoring grouting device, in particular to a dog-tooth barb grouting anchor rod for slope reinforcement in soft soil layers. Background Art

[0002] The existing anchor rods are mainly in the form of pointed steel pipes with holes in the pipe body for grouting anchoring. The fixing effect of this connection structure is not significant. In case of clay or soft soil (such as silt formation), the grouting holes are blocked, the formation permeability is poor, the grouting effect is limited, and the anchoring effect of the anchor rod is affected. Summary of the invention

[0003] The utility model aims to overcome the disadvantages of the prior art and provide a soft soil stratum dog-tooth barb grouting anchor rod with increased pull-out resistance and simple structure.

[0004] In order to solve the technical problems existing in the existing construction, the utility model adopts the following technical solutions:

[0005] The utility model discloses a grouting anchoring device for soft soil stratum, comprising an anchor rod and a round head rod, wherein the longitudinal cross-sections of the anchor rod and the round head rod are T-shaped and both are hollow structures, the bottom end of the anchor rod is conical, and a plurality of anchor rod grouting holes are opened on the conical bottom end of the anchor rod, and a plurality of telescopic openings are spaced apart up and down on the outer wall of the anchor rod along the axis direction of the anchor rod, a rotating shaft is fixed in the anchor rod cavity at each telescopic opening, and a barb is rotatably connected to each rotating shaft, the vertical rod of the round head rod can be inserted into the cavity of the anchor rod, the barb can rotate around the rotating shaft under the push of the round head rod and pass through the telescopic opening from the anchor rod cavity, and is located outside the anchor rod body, and the inner side is pressed against the top wall of the telescopic opening to limit the position, and the gap between the barb and the telescopic opening serves as a channel for slurry to overflow; the disc-shaped top end of the round head rod can press the disc-shaped top end setting of the anchor rod, and a plurality of round head rod grouting holes are opened on the rod wall of the round head rod.

[0006] Beneficial effects of the utility model:

[0007] (1) In addition to fixing the anchor rod by slurry, the device also increases the pull-out resistance by extending the barb into the formation, thereby further improving the stability.

[0008] (2) The device is easy to install. If the pull-out resistance meets the requirements, grouting is not required. If grouting is not required, the middle rod can be pulled out after use. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of the uninstalled structure of a grouting anchoring device for soft soil layer of the utility model;

[0010] Figure 2This is a schematic diagram of the structure of a soft soil grouting anchoring device after installation of the utility model;

[0011] Figure 3 yes Figure 2 The cross-sectional view of the anchor rod 1-1;

[0012] Figure 4 It is a three-dimensional diagram of the grouting anchoring device of the utility model;

[0013] Figure 5 It is a cross-sectional view of the grouting anchoring device of the utility model after the barb is extended;

[0014] Figure 6 It is a partial stereoscopic view of the slurry anchoring device of the utility model after the barb is extended;

[0015] Figure 7 yes Figure 6 A schematic structural diagram of the barb and fixed shaft parts in the structure. DETAILED DESCRIPTION

[0016] The utility model is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] As shown in the accompanying drawings, a grouting anchoring device for soft soil strata of the utility model comprises an anchor rod 2 and a round head rod 4. The longitudinal cross-sections of the anchor rod 2 and the round head rod 4 are T-shaped and both are hollow structures. The bottom end of the anchor rod is conical, and a plurality of anchor rod grouting holes 1 are opened on the conical bottom end of the anchor rod. Along the axis direction of the anchor rod, a plurality of telescopic openings are spaced apart up and down on the outer wall of the anchor rod. A rotating shaft is fixed in the anchor rod cavity at each telescopic opening, and a barb is rotatably connected to each rotating shaft. The round head rod The vertical rod of 4 can be inserted into the cavity of the anchor rod. The barb can rotate around the rotating axis under the push of the round head rod and pass through the telescopic opening from the cavity of the anchor rod 2. After being located outside the rod body of the anchor rod 2, the inner side is pressed against the top wall of the telescopic opening to limit the position. During the insertion of the round head rod 4 into the anchor rod 2, the barb 3 can be pushed out of the rod body of the anchor rod 2 and inserted into the formation to bite deeply. Before the barb is extended, it is enclosed in the anchor rod. The telescopic opening is closed with adhesive tape to prevent it from extending out of the anchor rod during the anchoring process, which makes it difficult to drive the anchor rod. The gap between the barb and the telescopic opening serves as a channel for the slurry to overflow.

[0018] The disc-shaped top of the round-head rod can be pressed against the disc-shaped top of the anchor rod, and a plurality of round-head rod grouting holes are opened on the rod wall of the round-head rod. The tail of the round-head rod is disc-shaped, which is convenient for hammering installation.

[0019] Preferably, the multiple round-head rod grouting holes are arranged in a plum blossom shape, which can ensure that the slurry overflows more evenly.

[0020] Preferably, the top surface of the barb after extending out of the telescopic opening is canine-tooth-shaped, which can enhance the anchoring force.

[0021] Preferably, two barbs 3 are symmetrically arranged along the same circumferential direction of the anchor rod, so as to ensure that the anchor rod is evenly stressed when the barbs bite into the formation and the anchor rod will not deviate.

[0022] Preferably, a limiting structure is connected to the rotating shafts on both sides of each barb, so that the barb will not move on the fixed shaft. The limiting structure may be a stopper or the like.

[0023] The method of using this device is:

[0024] The opening through which the barb 3 on the rod body of the anchor rod 2 extends is closed with tape, the anchor rod 2 is inserted into the soil at a predetermined position, the anchor rod 2 is hammered until the bottom disk fits with the ground, and then the round head rod 4 is inserted into the cavity of the anchor rod, and the round head rod 4 is hammered to make the bottom disk fit with the bottom of the anchor rod. The installation of the anchor rod 2 is completed, and whether the pull-out resistance of the anchor rod 2 meets the requirements is tested. If so, grouting is not required. If not, grouting is performed under pressure in the cavity of the round head rod. The slurry enters the anchor rod along the opening of the round head rod 4, and enters the soil through the opening of the anchor rod 2 and the channel for the overflow of the slurry.

[0025] The above-mentioned specific implementations are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can make many modifications without departing from the purpose of the present invention and the scope of protection of the claims, all of which are protected by the present invention.

Claims

1. A grouting anchoring device for soft soil, characterized in that: It comprises an anchor rod and a round head rod, the longitudinal cross-sections of the anchor rod and the round head rod are T-shaped and both are hollow structures, the bottom end of the anchor rod is conical, a plurality of anchor rod grouting holes are opened on the conical bottom end of the anchor rod, and a plurality of telescopic openings are spaced apart up and down on the outer wall of the anchor rod along the axis direction of the anchor rod, a rotating shaft is fixed in the anchor rod cavity at each telescopic opening, a barb is rotatably connected to each rotating shaft, the vertical rod of the round head rod can be inserted into the cavity of the anchor rod, the barb can rotate around the rotating shaft under the push of the round head rod and pass through the telescopic opening from the anchor rod cavity, then is located outside the anchor rod body and the inner side is pressed against the top wall of the telescopic opening to limit the position, and the gap between the barb and the telescopic opening serves as a channel for slurry to overflow; the disc-shaped top end of the round head rod can press the disc-shaped top end setting of the anchor rod, and a plurality of round head rod grouting holes are opened on the rod wall of the round head rod.

2. The soft soil grouting anchoring device according to claim 1 is characterized in that: The multiple round-head rod grouting holes are arranged in a plum blossom shape.

3. The soft soil grouting anchoring device according to claim 1 or 2, characterized in that: The top surface of the barb is canine-shaped after extending out of the telescopic opening.

4. The soft soil grouting anchoring device according to claim 3 is characterized in that: Two barbs are symmetrically arranged along the same circumferential direction of the anchor rod.

5. The soft soil grouting anchoring device according to claim 3, characterized in that: The rotating shafts on both sides of each barb are respectively connected with limited position structures.

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