Anti-floating anchor rod structure

Abstract

According to the technical scheme, the anti-floating anchor rod structure is characterized in that the anti-floating anchor rod structure comprises a grouting pipe and an anti-floating anchor rod, the grouting pipe comprises a lower pipe body used for abutting against the bottom of a hole, the side, facing the bottom of the hole, of the lower pipe body is closed, the lower pipe body is connected with a grouting assembly, the grouting assembly is connected with an upper pipe body and an impeller assembly arranged in the upper pipe body, and the impeller assembly is connected with the anti-floating anchor rod. The grouting assembly comprises a positioning pipe rotationally connected with the upper pipe body, a spray head communicated with the interior of the positioning pipe is fixedly connected to the exterior of the positioning pipe, and the spraying direction of the spray head is perpendicular to the extending direction of the positioning pipe and is consistent with the tangential direction of the side face of the positioning pipe. And the spraying direction of the spraying head is perpendicular to the extending direction of the positioning pipe and is consistent with the tangential direction of the side face of the positioning pipe, so that the spraying head can rotate by 90 degrees, and the purposes that the spraying angle is automatically adjusted during high-pressure rotary jet grouting, the grout can completely cover the steel bars, and the anti-floating strength is improved are achieved.

Description

Technical Field

[0001] The utility model relates to an anti-floating anchor rod structure. Background Art

[0002] The anti-floating anchor structure is the most commonly used process structure in the anti-floating measures of underground structures in construction projects. It is mainly used to prevent buildings or other structures from being affected by settlement or floating, and to ensure the stability and safety of buildings and structures. The most critical factor affecting the quality of anti-floating anchors is the grouting molding effect. At present, the most common anti-floating anchor grouting process is to first carry out normal pressure grouting and then carry out secondary high-pressure grouting. However, this traditional grouting method has many difficulties in application in some construction sites with high permeability coefficients and high water levels, such as difficult grouting molding, large amount of cement consumed in grouting, and the inability to effectively control the molding quality of anchor rods and anchor bodies. In the existing technology, high-pressure rotary jet grouting is usually used to improve the above problems. However, a common practice during high-pressure rotary jet grouting is to drill the grouting pipe from one side of the anchor steel frame, which results in the steel bars being unable to be located in the center of the anchor body, reducing the anchor's anti-floating ability to a certain extent. It may even cause local steel bars to be unwrapped by the anchor body due to the injection angle problem. After the steel bars are corroded, the anti-floating anchor completely fails. Therefore, an anti-floating anchor is needed, which can automatically adjust the injection angle during high-pressure rotary jet grouting so that the slurry can completely cover the steel bars and improve the anti-floating strength.

[0003] In view of the above reasons, how to automatically adjust the injection angle during high-pressure rotary jet grouting is exactly the problem considered in this application. Utility Model Content

[0004] In view of the shortcomings of the prior art, an anti-floating anchor rod structure is provided, which can automatically adjust the injection angle during high-pressure rotary jet grouting so that the slurry can completely cover the steel bars and improve the anti-floating strength.

[0005] To achieve the above-mentioned purpose, the following technical scheme is provided: an anti-floating anchor structure, comprising a grouting pipe and an anti-floating anchor, the grouting pipe comprising a lower tube body for resisting the bottom of the hole, the lower tube body being closed toward the bottom of the hole, the lower tube body being connected to a grouting assembly, the grouting assembly being connected to an upper tube body and an impeller assembly arranged in the upper tube body, the grouting assembly comprising a positioning tube rotatably connected to the upper tube body, a nozzle fixedly connected to the outside of the positioning tube and communicating with the inside of the positioning tube, the spraying direction of the nozzle being perpendicular to the extension direction of the positioning tube and consistent with the tangent direction of the side of the positioning tube.

[0006] In summary, the above technical solution has the following beneficial effects: the anti-floating anchor rod is usually made of steel bars, and four steel bars are distributed in a circular array at intervals of °, the grouting pipe is arranged at the center point of the array, and the nozzle arranged on the grouting pipe rotates with the center point of the array as the rotation center. When the slurry flows to the impeller assembly, the high-speed flowing slurry will impact the impeller assembly, causing the impeller assembly to rotate. When the impeller assembly rotates, it can drive the grouting assembly to rotate, thereby causing the nozzle to rotate, and since the bottom of the lower tube body is closed, the slurry will generate a large hydraulic pressure at the bottom, and finally be ejected from the nozzle under the action of the hydraulic pressure, and since the spraying direction of the nozzle is consistent with the tangent direction of the side of the positioning tube, a reaction force that pushes the nozzle to rotate is formed after the liquid impacts the surrounding soil, thereby further enabling the nozzle to maintain rotation;

[0007] The lower pipe body has a certain length. On the one hand, a part of the slurry can be intercepted at the bottom, so that the subsequent slurry will not directly impact the bottom of the lower pipe body when it is pressurized. This part of the slurry can be used as a buffer to prevent the bottom of the lower pipe body from being damaged by excessive impact force. On the other hand, it can accommodate large impurities in the slurry, such as stones that accidentally fall in. Although these impurities will not be sprayed out with the slurry, they are easy to clog the nozzle. The lower pipe body can keep these impurities in the lower pipe body to prevent them from moving to the nozzle and clogging the nozzle.

[0008] In addition, because the four steel bars are arranged in a circular array at intervals of degrees, the nozzle can evenly cover the steel bars when rotating to spray out the slurry, ensuring that the steel bars can be located in the anchor body during grouting construction, avoiding the quality risk of anchor failure caused by exposed rust caused by the anchor bars without concrete wrapping, and automatically adjusting the spray angle during high-pressure rotary jet grouting, so that the slurry can completely cover the steel bars;

[0009] The utility model provides a rotatable nozzle, and the spraying direction of the nozzle is set to be perpendicular to the extension direction of the positioning tube and consistent with the tangent direction of the side of the positioning tube, so that the nozzle can rotate at degrees, thereby realizing automatic adjustment of the spraying angle during high-pressure rotary grouting, so that the slurry can completely cover the steel bars, thereby improving the anti-floating strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a three-dimensional structural schematic diagram of an anti-floating anchor structure;

[0011] Figure 2 It is a top view of the impeller assembly of the utility model;

[0012] Figure 3 It is a bottom-up cross-sectional view of the grouting assembly in the utility model;

[0013] Figure 4 It is a side sectional view of the utility model.

[0014] Reference numerals: 1, grouting pipe; 2, anti-floating anchor rod; 3, lower pipe body; 4, grouting assembly; 5, upper pipe body; 6, impeller assembly;

[0015] 21. Positioning ring; 22. Guide tube; 23. PVC tube;

[0016] 31. A second accommodating chamber;

[0017] 41. Positioning tube; 42. Nozzle; 43. Stabilizing ring; 44. First supporting ring; 45. First limiting ring; 46. Second supporting ring; 47. Second limiting ring;

[0018] 51. A first accommodating chamber;

[0019] 61. Isolation disk; 62. Through hole; 63. First transmission shaft; 64. Impeller; 65. Second transmission shaft; 66. Bracket; DETAILED DESCRIPTION

[0020] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. The same parts are represented by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "bottom surface" and "top surface", "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0021] Reference Figure 1-4 As shown, an anti-floating anchor rod structure includes a grouting pipe 1 and an anti-floating anchor rod 2, the grouting pipe 1 includes a lower pipe body 3 for contacting the bottom of the hole, the lower pipe body 3 is closed toward the bottom of the hole, the lower pipe body 3 is connected to a grouting assembly 4, the grouting assembly 4 is connected to an upper pipe body 5 and an impeller assembly 6 arranged in the upper pipe body 5, the grouting assembly 4 includes a positioning pipe 41 rotatably connected to the upper pipe body 5, a nozzle 42 connected to the positioning pipe 41 is fixedly connected to the outside of the positioning pipe 41, and the spraying direction of the nozzle 42 is perpendicular to the extension direction of the positioning pipe 41 and consistent with the tangent direction of the side of the positioning pipe 41;

[0022] The anti-floating anchor rod 2 is usually made of steel bars, and four steel bars are arranged in a circular array at intervals of 90 degrees. The grouting pipe 1 is set at the center point of the array. The nozzle 42 set on the grouting pipe 1 rotates with the center point of the array as the rotation center. When the slurry flows to the impeller assembly 6, the high-speed flowing slurry will impact the impeller assembly 6, causing the impeller assembly 6 to rotate. When the impeller assembly 6 rotates, it can drive the grouting assembly 4 to rotate, thereby causing the nozzle 42 to rotate. Since the bottom of the lower tube body 3 is closed, the slurry will generate a large hydraulic pressure at the bottom, and finally be ejected from the nozzle 42 under the action of the hydraulic pressure. Since the spraying direction of the nozzle 42 is consistent with the tangent direction of the side of the positioning tube 41, a reaction force that pushes the nozzle 42 to rotate is formed after the liquid impacts the surrounding soil, thereby further enabling the nozzle 42 to maintain rotation;

[0023] The lower tube body 3 has a certain length. On the one hand, a part of the slurry can be intercepted at the bottom, so that the subsequent slurry will not directly impact the bottom of the lower tube body 3 when it is pressurized. This part of the slurry can be used as a buffer to prevent the bottom of the lower tube body 3 from being damaged by excessive impact force. On the other hand, it can accommodate large impurities in the slurry, such as stones that accidentally fall in. Although these impurities will not be sprayed out with the slurry, they are easy to block the nozzle 42. This is because the lower tube body 3 allows these impurities to remain in the lower tube body 3 to prevent them from moving to the nozzle 42 and blocking the nozzle 42;

[0024] In addition, because the four steel bars are arranged in a circular array at intervals of 90 degrees, the nozzle 42 can evenly cover the steel bars when rotating to spray out the slurry, ensuring that the steel bars can be located in the anchor body during grouting construction, avoiding the quality risk of the anchor rod failing due to exposed rust caused by the anchor rod steel bars not wrapped in concrete, and achieving the purpose of automatically adjusting the spray angle during high-pressure rotary jet grouting so that the slurry can completely cover the steel bars;

[0025] The utility model provides a rotatable nozzle 42, and the spraying direction of the nozzle 42 is perpendicular to the extension direction of the positioning tube 41 and consistent with the tangent direction of the side of the positioning tube 41, so that the nozzle 42 can rotate 360 ​​degrees, thereby realizing automatic adjustment of the spraying angle during high-pressure rotary grouting, so that the slurry can completely cover the steel bars and improve the anti-floating strength.

[0026] Furthermore, the anti-floating anchor rod 2 is also fixedly connected with a positioning ring 21, and the positioning ring 21 abuts against a guide pipe 22 for guiding the grouting pipe 1;

[0027] The guide tube 22 includes a plurality of PVC tubes 23 fixedly connected to each other, and the joints between the plurality of PVC tubes 23 are arranged at the positioning ring 21;

[0028] Since the guide tube 22 is in contact with the positioning ring 21, the guide tube 22 can guide the grouting tube 1 to be in the middle of the four steel bars, so that when the slurry is sprayed by high-pressure rotary jet, the slurry can evenly cover the four steel bars, and the PVC tube 23 will be broken when it is impacted by the high-pressure slurry. The broken PVC fragments are large in size and will rotate with the rotation of the nozzle 42, so that a structure similar to a mixer can be formed. On the one hand, the slurry can be continuously stirred to break the bubbles between the slurry and reduce the surface tension of the slurry surface, so that the slurry can be in full contact with the steel bar surface. On the other hand, the PVC fragments can also continuously collide with the surrounding soil, play the role of punching, disturbing, and destroying the soil, forcibly stirring and mixing the slurry with the soil particles, and forming a cemented object similar to concrete with the sand and gravel around the nozzle, thereby avoiding the loss of cement slurry under flowing water, effectively forming an anchor body, and strengthening the connection strength between the slurry and the soil after solidification, thereby improving the anti-buoyancy strength.

[0029] In addition, the positioning rings 21 are distributed at a certain interval, and the joints between the multiple PVC pipes 23 are arranged at the positioning rings 21, so that the upper PVC pipes 23 can be prevented from breaking at the connection when the slurry is sprayed.

[0030] Furthermore, the positioning tube 41 is fixedly connected with a stabilizing ring 43 fixedly connected with the nozzle 42, and the stabilizing ring 43 is slidably connected with both the upper tube body 5 and the lower tube body 3 and wraps the upper tube body 5 and the lower tube body 3;

[0031] Since the connection between the positioning tube 41 and the upper tube body 5 and the lower tube body 3 is only on the horizontal contact surface, there is a risk of disconnection. Therefore, a stabilizing ring 43 is provided to be in contact with the upper tube body 5 and the lower tube body 3 on the vertical contact surface, and the positioning is limited from two vertical surfaces to further reduce the possibility of the positioning ring 21 being detached due to the impact of slurry.

[0032] Further, the impeller assembly 6 includes an isolation disk 61 fixedly connected to the upper tube body 5, and a plurality of through holes 62 for slurry to pass through are provided on the isolation disk 61. The isolation disk 61 is rotatably connected to a first transmission shaft 63, and the first transmission shaft 63 is fixedly connected to an impeller 64 with inclined blades and a second transmission shaft 65 arranged away from the impeller 64, and the second transmission shaft 65 is fixedly connected to a plurality of brackets fixedly connected to the positioning tube 41;

[0033] The slurry will continuously impact the blades when flowing. Since the blades are set at an angle, the impeller 64 will be subjected to a force for rotation as a whole. When the impeller 64 rotates, it drives the first transmission shaft 63 to rotate, and then drives the positioning tube 41 to rotate through the second transmission shaft 65 and the bracket, thereby achieving the purpose of automatically adjusting the injection angle during high-pressure rotary jet grouting.

[0034] Furthermore, the positioning tube 41 is also fixedly connected to a first support ring 44 disposed toward the upper tube body 5, and the first support ring 44 is fixedly connected to a first limit ring 45 disposed toward the upper tube body 5, and the outer diameter of the first limit ring 45 is greater than the outer diameter of the first support ring 44, and the upper tube body 5 is provided with a first accommodating cavity 51 whose inner wall abuts against both the first support ring 44 and the first limit ring 45 on one side toward the positioning tube 41;

[0035] The positioning tube 41 is also fixedly connected to a second support ring 46 disposed toward the lower tube body 3, and the second support ring 46 is fixedly connected to a second limit ring 47 disposed toward the lower tube body 3, and the outer diameter of the second limit ring 47 is greater than the outer diameter of the second support ring 46, and the lower tube body 3 is provided with a second accommodating cavity 31 on the side facing the positioning tube 41, the inner wall of which abuts against the second support ring 46 and the second limit ring 47;

[0036] The positioning tube 41 cooperates with each other by setting the first accommodating cavity 51, the first support ring 44 and the first limit ring 45. On the one hand, the outer diameter of the first limit ring 45 is larger than the outer diameter of the first support ring 44. This setting can prevent the positioning tube 41 from separating from the upper tube body 5. On the other hand, the inner wall of the first accommodating cavity 51 abuts against the first support ring 44 and the first limit ring 45, which can ensure the smooth rotation of the positioning tube 41. The second accommodating cavity 31, the second support ring 46 and the second limit ring 47 are set in the same way.

[0037] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. An anti-floating anchor structure, characterized in that: The invention comprises a grouting pipe (1) and an anti-floating anchor rod (2), wherein the grouting pipe (1) comprises a lower pipe body (3) for contacting the bottom of a hole, the lower pipe body (3) is closed toward the bottom of the hole, the lower pipe body (3) is connected to a grouting assembly (4), the grouting assembly (4) is connected to an upper pipe body (5) and an impeller assembly (6) arranged in the upper pipe body (5), the grouting assembly (4) comprises a positioning pipe (41) rotatably connected to the upper pipe body (5), a nozzle (42) connected to the inside of the positioning pipe (41) is fixedly connected to the outside of the positioning pipe (41), and the spraying direction of the nozzle (42) is perpendicular to the extension direction of the positioning pipe (41) and is consistent with the tangent direction of the side of the positioning pipe (41).

2. The anti-floating anchor structure according to claim 1, characterized in that: The anti-floating anchor rod (2) is also fixedly connected to a positioning ring (21), and the positioning ring (21) is in contact with a guide pipe (22) for guiding the grouting pipe (1).

3. The anti-floating anchor structure according to claim 2, characterized in that: The guide tube (22) comprises a plurality of PVC tubes (23) fixedly connected to each other, and the joints between the plurality of PVC tubes (23) are arranged at the positioning ring (21).

4. The anti-floating anchor structure according to claim 1, characterized in that: The positioning tube (41) is fixedly connected to a stabilizing ring (43) which is fixedly connected to the nozzle (42); the stabilizing ring (43) is slidably connected to both the upper tube body (5) and the lower tube body (3) and wraps around the upper tube body (5) and the lower tube body (3).

5. The anti-floating anchor structure according to claim 1, characterized in that: The impeller assembly (6) comprises an isolation disk (61) fixedly connected to the upper tube body (5), the isolation disk (61) being provided with a plurality of through holes (62) for slurry to pass through, the isolation disk (61) being rotatably connected to a first transmission shaft (63), the first transmission shaft (63) being fixedly connected to an impeller (64) having blades arranged in an inclined manner and a second transmission shaft (65) arranged away from the impeller (64), the second transmission shaft (65) being fixedly connected to a plurality of brackets (66) fixedly connected to the positioning tube (41).

6. The anti-floating anchor structure according to claim 5, characterized in that: The positioning tube (41) is also fixedly connected to a first support ring (44) arranged toward the upper tube body (5); the first support ring (44) is fixedly connected to a first limit ring (45) arranged toward the upper tube body (5); the outer diameter of the first limit ring (45) is greater than the outer diameter of the first support ring (44); and a first accommodating cavity (51) whose inner wall abuts against both the first support ring (44) and the first limit ring (45) is provided on a side of the upper tube body (5) facing the positioning tube (41).

7. The anti-floating anchor structure according to claim 5, characterized in that: The positioning tube (41) is also fixedly connected to a second support ring (46) disposed toward the lower tube body (3); the second support ring (46) is fixedly connected to a second limit ring (47) disposed toward the lower tube body (3); the outer diameter of the second limit ring (47) is greater than the outer diameter of the second support ring (46); and a second accommodating cavity (31) whose inner wall abuts against both the second support ring (46) and the second limit ring (47) is provided on a side of the lower tube body (3) facing the positioning tube (41).

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