Rock-soil anchoring structure

Abstract

The utility model relates to the technical field of anchor rods, in particular to a rock-soil anchoring structure which comprises hollow anchor rod bodies, drill bits are installed at the front ends of the hollow anchor rod bodies in a threaded mode, the adjacent hollow anchor rod bodies are connected through connecting sleeves, and grout stopping assemblies are arranged at the tail ends of the hollow anchor rod bodies. An annular groove is formed in the periphery of the hollow anchor rod body, a plurality of grouting holes distributed in a circumferential array mode are formed in the position, close to the tail end of the hollow anchor rod body, of the periphery of the annular groove, and a plurality of limiting grooves distributed in a circumferential array mode are formed in the periphery of the annular groove. The periphery of the annular groove is slidably sleeved with an anti-blocking assembly used for preventing the grouting hole from being blocked in the drilling process. Due to the arrangement of the anti-blocking assembly, it is guaranteed that a grouting hole is absolutely closed in the drilling process, and efficient hole penetrating in the grouting stage is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of anchor rod, specifically is a geotechnical anchoring structure. BACKGROUND

[0002] As a core means to improve the stability of geotechnical engineering, geotechnical anchoring technology plays a key role in the fields of slope support, tunnel reinforcement, etc. Among them, hollow anchor rod has become the mainstream choice of modern geotechnical engineering due to its technical advantages of "self-drilling and grouting integration". This technology integrates anchor rod body and grouting channel, realizing continuous operation of drilling, grouting and anchoring.

[0003] During the drilling process of hollow anchor rod, the drill bit at the front end of the anchor rod cuts the geotechnical body to produce a large amount of debris. These particles of different particle sizes are easily reversed into the inner cavity channel of the hollow anchor rod through the drill bit discharge hole under the action of high-pressure airflow or flushing liquid. The grouting hole of the traditional anchor rod lacks dynamic protection device. When the drill rod rotates and advances, the grouting hole is directly exposed to the debris environment, resulting in the accumulation of debris and forming physical blockage, which affects the anchoring effect. SUMMARY

[0004] The purpose of the utility model is to provide a geotechnical anchoring structure to solve the problems raised in the background technology.

[0005] The purpose of the utility model can be realized by the following technical solutions:

[0006] A geotechnical anchoring structure, comprising a hollow anchor rod body, a drill bit is installed at the front end of the hollow anchor rod body, adjacent hollow anchor rod bodies are connected through a connecting sleeve, and a grouting stop assembly is arranged at the end of the hollow anchor rod body; an annular groove is formed on the periphery of the hollow anchor rod body, a plurality of grouting holes are arranged in a circumferential array on the periphery of the annular groove near the end of the hollow anchor rod body, and a plurality of limiting grooves are arranged in a circumferential array on the periphery of the annular groove.

[0007] A anti-blocking assembly is slidably arranged on the periphery of the annular groove to prevent the grouting hole from being blocked during drilling.

[0008] Further, the anti-blocking assembly comprises a sliding sleeve slidably arranged on the periphery of the annular groove, and the length of the sliding sleeve is less than the length of the annular groove.

[0009] A spiral drill blade is fixedly installed on the periphery of the sliding sleeve.

[0010] A plurality of protrusions equal in number to the limiting grooves are fixedly installed on the inner wall of the sliding sleeve, and the ends of the protrusions away from the inner wall of the sliding sleeve are respectively slidably arranged in the limiting grooves.

[0011] Further, the diameter of the spiral drill blade is equal to the diameter of the drill bit.

[0012] Further, the stop grouting assembly comprises a pad plate and a grouting stopper which are sleeved on the outer periphery of the hollow anchor rod body, and a locking nut which is threadedly installed on the outer periphery of the hollow anchor rod body, the pad plate is located between the locking nut and the grouting stopper, and the locking nut is located on the side of the pad plate close to the end of the hollow anchor rod body.

[0013] Further, the pad plate comprises a first pressing plate and a second pressing plate which are sleeved on the outer periphery of the hollow anchor rod body, and the second pressing plate is located between the first pressing plate and the locking nut.

[0014] The side of the first pressing plate close to the second pressing plate is fixedly connected with a slide rod at a corner position, and the end of the slide rod away from the first pressing plate is fixedly installed with a limiting block after sliding through the second pressing plate.

[0015] The outer periphery of the slide rod is sleeved with a spring located between the second pressing plate and the first pressing plate.

[0016] The beneficial effects of the utility model are as follows:

[0017] In the anti-blocking assembly, the mechanical action of the spiral drill blade and the hole wall realizes the intelligent opening and closing of the anti-blocking assembly, and in combination with the simple operation of the external pulling anchor rod, the absolute closure of the grouting hole during drilling is ensured, and the efficient through hole during the grouting stage is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced as follows, and obviously, other drawings can be obtained by the ordinary skilled in the art without creative labor on the premise that there is no creative labor;

[0019] Figure 1 It is the structure schematic diagram of the utility model as a whole;

[0020] Figure 2 It is the three-dimensional schematic diagram of the anchor rod body in the utility model;

[0021] Figure 3 It is the three-dimensional schematic diagram of the grouting hole in the closed state;

[0022] Figure 4 It is the three-dimensional schematic diagram of the grouting hole in the open state;

[0023] Figure 5 It is Figure 3 The enlarged view of the A part in the middle;

[0024] Figure 6 It is Figure 4 The enlarged view of the B part in the middle;

[0025] Figure 7 is the structure diagram of the backing plate in the utility model;

[0026] Figure 8 is Figure 7 the enlarged view of the C part in the utility model;

[0027] Wherein, the reference signs are as follows:

[0028] 1-hollow anchor rod body, 2-locking nut, 3-backing plate, 4-grouting plug, 5-connection sleeve, 6-drill bit, 7-anti-blocking assembly, 8-annular groove, 9-limiting groove, 10-grouting hole, 11-sliding sleeve, 12-auger blade, 13-pressing plate one, 14-pressing plate two, 15-sliding rod, 16-spring, 17-protrusion, 18-limiting block. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0030] Embodiment 1:

[0031] Please refer to Figures 1-6 In the embodiments of the utility model, a rock-soil anchoring structure comprises a hollow anchor rod body 1, a drill bit 6 is threadedly installed at the front end of the hollow anchor rod body 1, adjacent hollow anchor rod bodies 1 are connected through a connection sleeve 5, and a grouting plug assembly is arranged at the end of the hollow anchor rod body 1; characterized in that an annular groove 8 is formed around the hollow anchor rod body 1, a plurality of grouting holes 10 are formed in a circumferential array around the annular groove 8 at a position close to the end of the hollow anchor rod body 1, and a plurality of limiting grooves 9 are formed in a circumferential array around the annular groove 8.

[0032] An anti-blocking assembly 7 for preventing the grouting holes 10 from being blocked during drilling is slidably sleeved around the annular groove 8.

[0033] The anti-blocking assembly 7 comprises a sliding sleeve 11 slidably sleeved around the annular groove 8, and the length of the sliding sleeve 11 is less than the length of the annular groove 8.

[0034] An auger blade 12 is fixedly installed around the sliding sleeve 11.

[0035] A plurality of protrusions 17 equal in number to the limiting grooves 9 are fixedly installed on the inner wall of the sliding sleeve 11, and the ends of the plurality of protrusions 17 away from the inner wall of the sliding sleeve 11 are respectively slidably clamped in the plurality of limiting grooves 9.

[0036] Wherein, the diameter of the spiral drill blade 12 is equal to the diameter of the drill bit 6.

[0037] Wherein, the stopper assembly comprises a pad plate 3 and a stopper plug 4 which are sleeved on the outer periphery of the hollow anchor rod body 1, and a locking nut 2 which is screwed on the outer periphery of the hollow anchor rod body 1, the pad plate 3 is located between the locking nut 2 and the stopper plug 4, and the locking nut 2 is located on the side of the pad plate 3 close to the end of the hollow anchor rod body 1.

[0038] The utility model discloses in using:

[0039] The drill bit 6 drives the anchor rod body 1 to rotate into the rock-soil layer, and the spiral drill blade 12 rotates synchronously and is in close contact with the wall of the hole. The friction between the spiral drill blade 12 and the hole wall pushes the sliding sleeve 11 to move backward along the annular groove 8 until the grouting hole 10 is completely covered, forming a physical barrier to prevent rock debris from entering the hole.

[0040] After the drilling is completed, the hollow anchor rod body 1 is pulled out a certain distance by the drilling machine. During the pulling-out process, the direction of the friction between the spiral drill blade 12 and the hole wall changes, pushing the sliding sleeve 11 to move forward along the annular groove 8, so that the grouting hole 10 is completely exposed.

[0041] The grout enters the annular groove 8 through the inner cavity of the hollow anchor rod body 1 and is uniformly injected into the rock-soil body through the circumferentially distributed grouting holes 10, filling the fissures and forming a reinforced layer.

[0042] In the anti-blocking assembly 7, the mechanical action between the spiral drill blade 12 and the hole wall realizes the intelligent opening and closing of the anti-blocking assembly.

[0043] Example 2:

[0044] Please refer to Figure 1 , Figure 7 and Figure 8 , on the basis of example 1, the pad plate 3 comprises a pressing plate one 13 and a pressing plate two 14 which are sleeved on the outer periphery of the hollow anchor rod body 1, and the pressing plate two 14 is located between the pressing plate one 13 and the locking nut 2.

[0045] The side of the pressing plate one 13 close to the pressing plate two 14 is fixedly connected with a slide rod 15 at the corner position, and one end of the slide rod 15 away from the pressing plate one 13 is fixedly installed with a limiting block 18 after sliding through the pressing plate two 14.

[0046] The outer periphery of the slide rod 15 is sleeved with a spring 16 located between the pressing plate two 14 and the pressing plate one 13.

[0047] After the grouting is completed, the locking nut 2 is tightened, the spring 16 is compressed, the stop grouting plug 4 is pushed to expand and tightly contact with the hole wall, dynamic sealing under high pressure condition is realized, and backflow of the grout is prevented; through the spring 16 and the double pressing plate design, the stop grouting plug 4 has self-adapting compression capacity, even under the condition of high pressure grouting, the sealing performance is still superior to the traditional structure, and the risk of leakage is reduced.

[0048] The basic principle, main features and advantages of the utility model are shown and described above. It should be understood by the person skilled in the art that the utility model is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principle of the utility model, and various changes and improvements of the utility model can be made without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed.

Claims

1. A geotechnical anchoring structure comprising hollow anchor rod bodies (1), the front end of the hollow anchor rod bodies (1) is threaded with a drill bit (6), the adjacent hollow anchor rod bodies (1) are connected through a connecting sleeve (5), and the end of the hollow anchor rod body (1) is provided with a grout stopping assembly; characterized in that, The hollow anchor rod body (1) is provided with an annular groove (8) on the periphery, a plurality of grouting holes (10) are arranged in the annular groove (8) in a circumferential array near the end of the hollow anchor rod body (1), and a plurality of limiting grooves (9) are arranged on the periphery of the annular groove (8) in a circumferential array. The periphery of the annular groove (8) is sleeved with a anti-blocking assembly (7) for preventing the grouting hole (10) from being blocked during drilling.

2. A geotechnical anchoring structure according to claim 1, wherein, The anti-blocking assembly (7) comprises a sliding sleeve (11) sleeved on the periphery of the annular groove (8), and the length of the sliding sleeve (11) is less than the length of the annular groove (8). The periphery of the sliding sleeve (11) is fixedly provided with a spiral drill blade (12). A plurality of protrusions (17) are fixedly arranged on the inner wall of the sliding sleeve (11) and equal in number to the limiting grooves (9), and one end of each of the protrusions (17) away from the inner wall of the sliding sleeve (11) is slidably arranged in the limiting groove (9).

3. A geotechnical anchoring structure according to claim 2, wherein, The diameter of the spiral drill blade (12) is equal to the diameter of the drill bit (6).

4. A geotechnical anchoring structure according to claim 1, wherein, The stopper assembly comprises a pad (3) and a stopper plug (4) sleeved on the periphery of the hollow anchor rod body (1), and a locking nut (2) threadedly mounted on the periphery of the hollow anchor rod body (1), the pad (3) is located between the locking nut (2) and the stopper plug (4), and the locking nut (2) is located on one side of the pad (3) close to the end of the hollow anchor rod body (1).

5. A geotechnical anchoring structure according to claim 4, wherein, The pad (3) comprises a first pressing plate (13) and a second pressing plate (14) sleeved on the periphery of the hollow anchor rod body (1), and the second pressing plate (14) is located between the first pressing plate (13) and the locking nut (2). The side of the first pressing plate (13) close to the second pressing plate (14) is fixedly connected with a slide rod (15) at the corner position, and one end of the slide rod (15) away from the first pressing plate (13) is fixedly provided with a limiting block (18) after sliding through the second pressing plate (14). The periphery of the slide rod (15) is sleeved with a spring (16) between the second pressing plate (14) and the first pressing plate (13).

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