Hollow mortar anchor rod structure for sandy gravel stratum
By using a hollow mortar anchor structure with an enlarged drill bit and a grout discharge tube design, the problem of low anchoring stability in gravel strata was solved, achieving efficient anchoring and improved construction efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-25
- Publication Date
- 2026-03-27
AI Technical Summary
In gravel strata, the existing anchor bolt construction process suffers from small trench diameter and low concrete layer thickness, resulting in low anchoring stability. Furthermore, increasing the number of anchor bolts increases the slope load and reduces construction efficiency.
The hollow mortar anchor structure is adopted. The trench is enlarged during the drilling process using a reaming drill bit and a reaming arm. The size of the enlarged hole is adjusted by a locking structure, and the concrete slurry is discharged in layers through a slurry discharge pipe to ensure full filling.
It improves anchoring stability, reduces anchor bolt consumption and construction workload, increases construction efficiency, and reduces slope load.
Smart Images
Figure CN224048128U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to sand pebble stratum anchoring technical field especially relates to a hollow mortar anchor rod structure for sand pebble stratum. BACKGROUND
[0002] Sand pebble stratum is a kind of stratum structure with more sand and pebble, which is different from traditional stratum structure, and the stratum structure is more loose due to a large amount of sand and pebble in sand pebble stratum, and the stratum structure is not stable during construction, which is easy to collapse during construction.
[0003] During construction, especially for sand pebble stratum such as slope and side slope, in order to strengthen the stability of slope and side slope, the current construction method is to drill mortar anchor rod into the bottom layer, and then inject concrete through mortar anchor rod, so as to anchor the slope body by using mortar anchor rod. After injecting concrete, the stability between mortar anchor rod and surrounding soil structure is increased.
[0004] However, during construction, the sand pebble stratum is very loose, and the diameter of mortar anchor rod is relatively small, so that after the anchor rod is grooved in the stratum structure, the diameter of the groove is too small, and after the subsequent injection of concrete, the thickness of the concrete structure layer is too low, resulting in that the anchoring stability between the anchor rod and the soil structure is not ideal.
[0005] Therefore, during actual construction, although the anchor rod is easy to drill into the loose sand pebble stratum, the anchoring stability after grouting is not high.
[0006] In the prior art, a groove with a large diameter is preformed, and then multiple anchor rods are drilled and grouted, which obviously consumes a large number of anchor rods and has a large amount of construction work. After increasing the number of anchor rods, the stability of the slope body is increased, but the load of the slope body is also increased.
[0007] Therefore, when facing this type of stratum structure, if a method can simultaneously drill anchor rod and expand the groove, increase the injected concrete, and improve the anchoring stability, the construction efficiency of the anchor rod will be greatly improved. CONTENT OF THE UTILITY MODEL
[0008] Based on the above background, the purpose of the utility model is to provide a hollow mortar anchor rod structure for sand pebble stratum.
[0009] To achieve the above purpose, the utility model adopts the following technical solutions:
[0010] A hollow mortar anchor rod structure for sand pebble stratum, comprising a grouting anchor rod with an internal hollow structure;
[0011] The outer end of the grouting anchor rod is provided with a grout stopping mechanism, and the inner end of the grouting anchor rod is provided with a drill bit structure;
[0012] The drill bit structure comprises a reaming drill bit, a plurality of reaming arm slots are formed in the reaming drill bit, a reaming arm cutter is hinged to the reaming arm slots, and a tooth-shaped structure is integrally formed on the reaming arm cutter.
[0013] The reaming arm slots are provided with a locking structure for locking the swing amplitude of the reaming arm cutter.
[0014] The locking structure comprises a pair of lock rods which are adjustably arranged and locked on both sides of the reaming arm cutter; and a reamer which is fixedly connected to the reaming arm cutter and arranged obliquely.
[0015] The locking structure further comprises a locking seat which is threadedly connected to the lock rods and fixedly installed in the reaming arm slots.
[0016] The reaming drill bit is fixedly connected with a blocking seat, and the blocking seat is provided with a grout discharge hole.
[0017] Preferably, the tooth-shaped structure is integrally formed on the side edges on both sides of the reaming arm cutter, and the tooth-shaped structure comprises a plurality of protruding teeth integrally formed on the reaming arm cutter.
[0018] Preferably, the protruding teeth are triangular in shape.
[0019] Preferably, the inner end of the reaming arm cutter is fixedly connected with a pin shaft which is hinged to the reaming arm slots.
[0020] The outer end of the reaming arm cutter is welded with a triangular sharp corner plate.
[0021] Preferably, the lock rods are integrally formed with hexagonal convex structures.
[0022] Preferably, the blocking seat is welded in the reaming drill bit.
[0023] The blocking seat is located at the outer side of the reaming arm slots.
[0024] A plurality of convex plate bodies are welded on the outer side wall of the blocking seat.
[0025] Preferably, the grout stopping mechanism comprises a grout stopping plug which is sleeved on the grouting anchor rod, a grout stopping plate which is slidingly connected to the grouting anchor rod, and a resisting nut which is threadedly connected to the grouting anchor rod and abuts against the grout stopping plate.
[0026] Preferably, the grout stopping plug is conical in shape.
[0027] Preferably, a plurality of small grouting pipes are communicated on the grouting anchor rod, and the pipe bodies of the small grouting pipes abut against the outer sidewall of the grouting anchor rod.
[0028] The small grouting pipes are distributed in a plurality of layers in the length direction of the grouting anchor rod, and the small grouting pipes in each layer are circumferentially distributed.
[0029] The utility model has the following beneficial effects:
[0030] 1. The locking rod is abutted to the two sides of the reaming arm cutter to realize positioning of the reaming arm cutter. Alternatively, the reaming arm cutter is locked in a non-abutting manner, so that the angle of the reaming arm cutter during the rotation process can be controlled. The reaming size of the groove is adjusted through the above-mentioned manner. During the working process, the convex teeth on the two sides of the reaming arm cutter break the hard pebbles in the stratum structure during the slotting of the hole. The reaming arm cutter can adjust the angle of opening to adjust the anchor rod groove according to the construction requirements.
[0031] 2. During the working process, the convex teeth on the two sides of the reaming arm cutter break the hard pebbles in the stratum structure during the slotting of the hole, so that the anchor rod can be smoothly drilled.
[0032] 3. During the working process, the concrete slurry is discharged from the grouting hole and each small grouting pipe and fills along the groove. Even if the groove collapses during the groove setting process, the concrete slurry can still fully fill the groove because the small grouting pipes are arranged in layers. BRIEF DESCRIPTION OF DRAWINGS
[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present utility model, and for those skilled in the art, other drawings can also be obtained according to the structures shown in the drawings without creative labor.
[0034] Figure 1 It is a schematic diagram of the overall structure in the embodiment of the present utility model;
[0035] Figure 2 It is a schematic diagram of the structure of the drill bit in the embodiment of the present utility model;
[0036] Figure 3 It is a schematic diagram of the structure of the reaming arm cutter in the embodiment of the present utility model;
[0037] Figure 4 It is a schematic diagram of the structure of the drill bit in the embodiment of the present utility model;
[0038] Figure 5For the embodiments of the present application Figure 1 The structural schematic diagram under another perspective.
[0039] The realization, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION
[0040] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.
[0041] It should be noted that all the directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications also change accordingly.
[0042] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, and when the combination of the technical solutions appears contradictory or unachievable, it should be considered that the combination of the technical solutions does not exist, and is not within the protection scope required by the present application.
[0043] Embodiment 1
[0044] As Figures 1-5 shown, a hollow mortar anchor rod structure for sand and gravel stratum, including internally hollowly arranged grouting anchor rod 1. The outer end of the grouting anchor rod 1 is provided with a grouting stop mechanism, and the inner end of the grouting anchor rod 1 is provided with a drill bit structure 3.
[0045] By improving the drill bit structure 3, a suitable diameter embedding groove can be formed on the sand and gravel stratum structure of the slope body according to the construction needs during the driving of the anchor rod.
[0046] Specific is, drill bit structure 3 includes reamer 31, the reamer 31 is provided with a plurality of reaming arm slots 311, the reamer 32 is hinged on the reaming arm slots 311, the inner end of the reamer 32 is fixedly connected with a pin shaft, and the pin shaft is hinged on the reaming arm slots 311, the reamer 32 is made of steel, and the reamer 32 is integrally formed with a tooth structure.
[0047] Specific is, the tooth structure is integrally formed on the side edges on the two sides of the reamer 32, and the tooth structure includes a plurality of convex teeth 321 integrally formed on the reamer 32 (the convex teeth 321 are triangular in shape).
[0048] The thickness of the convex teeth 321 is the same as that of the reamer 32, and the convex teeth 321 are triangular in shape. In the working process, the grouting anchor rod 1 is drilled into the stratum structure by the equipment, and under the cooperation of the reamer 32, the reamer 32 is scattered and opened during rotation due to the centrifugal force, so that the diameter of the groove is expanded to facilitate the subsequent injection of sufficient concrete slurry to form a concrete layer.
[0049] In actual work process, in order to adjust the diameter of the groove according to needs, the above-mentioned reaming arm slot 311 is provided with a locking structure 33 for locking and positioning the swing amplitude of the reamer 32.
[0050] The angle of the reamer 32 is controlled by the locking structure, for example, when the diameter of the groove is large, the angle of the reamer 32 is increased, and vice versa.
[0051] Specific is, the locking structure 33 includes a pair of adjustable locking rods 332, and the locking rods 332 are respectively locked on the two sides of the reamer 32.
[0052] The locking rods 332 abut against the two sides of the reamer 32 in an abutting manner to position the reamer 32. Alternatively, the reamer 32 is locked in a non-abutting manner, so that the angle of the reamer 32 can be controlled during rotation. The size of the reaming of the groove is adjusted by the above-mentioned manner.
[0053] Specific is, the locking structure further includes a locking seat 331 for threadedly connecting the locking rods 332 (the locking seat 331 is provided with a threaded groove of a certain depth), and the locking seat 331 is fixedly installed in the reaming arm slot 311.
[0054] Meanwhile, the locking rods 332 are integrally formed with hexagonal convex structures 3321. In the working process, the operator rotates the locking rods 332 by using a wrench, adjusts the depth of the locking rods 332 threadedly connected with the locking seat 331, and then adjusts the spacing between the locking rods 332 and the reamer 32.
[0055] During operation, when the reaming arm 32 is slotting the hole, the protruding teeth 321 on both sides of the reaming arm 32 break up the hard pebbles in the formation, ensuring that the anchor bolt can be drilled in smoothly. Similarly, the outer end of the reaming arm 32 is welded with a triangular pointed plate.
[0056] During operation, the rotating reaming drill bit 31 continuously contacts and rubs against the formation. Therefore, to further improve the breaking of hard materials such as rocks, a dipping cutter 34 with an oblique shape is fixedly connected to the reaming arm 32. The dipping cutter 34 is a right-angled triangle and is welded to the reaming arm 32. During rotation, the dipping cutter 34 also breaks up hard rocks.
[0057] Example 2
[0058] like Figures 1-5 As shown, in this embodiment, based on the structure of embodiment 1, a baffle seat 35 is fixedly connected inside the aforementioned reaming drill bit 31, and a grout discharge hole 351 is provided on the baffle seat 35. During the grouting process, concrete grout is discharged from the grout discharge hole.
[0059] Meanwhile, because the geological structure is soft sand and gravel, and in order to cope with the partial collapse of the trench after the borehole is enlarged, such as the collapse of sand and gravel, which would cause the grouting concrete to become blocked and unable to completely fill the trench, the above-mentioned grouting anchor 1 is connected to several grout discharge pipes 4. The pipe body of the grout discharge pipes abuts against the outer wall of the grouting anchor 1 (in order to reinforce, the grout discharge pipes 4 are welded, and the discharge end of the grout discharge pipe 4 is opposite to the forward direction of the anchor. The grout discharge pipes are bent and abut against the outer wall of the grouting anchor 1 in order to reduce the forward resistance of the anchor). The grout discharge pipes 4 are distributed in several layers along the length of the grouting anchor 1, and the grout discharge pipes 4 in each layer are distributed circumferentially.
[0060] During the operation, concrete slurry is discharged from the slurry drain hole and each slurry drain pipe 4 and fills the trench. Even if the trench collapses during the trenching process, the concrete slurry can still fully fill the trench because the slurry drain pipes are arranged in layers.
[0061] The aforementioned baffle seat 35 is welded inside the reaming drill bit 31; the baffle seat 35 is located on the outer side of the reaming arm groove 311; similarly, the slurry is discharged from the reaming arm groove 311.
[0062] Several protruding convex plates 352 are welded to the outer wall of the aforementioned baffle seat 35. During the rotation of the drill bit, the convex plates 352 (welded and fixed to the baffle seat 35) help to remove slag and prevent soil from clogging the slurry discharge hole 351. The baffle seat 35 also prevents slag and soil from entering the drill bit and anchor rod.
[0063] Example 3
[0064] As Figures 1-5 shown in the figure, the embodiment is based on the structure of embodiment 2, same as the existing grouting anchor rod 1, the above-mentioned grouting stop mechanism includes a grouting stop plug 22 (the shape of the grouting stop plug 22 is conical, made of rubber, used for plugging the notch part of the groove) sleeved on the grouting anchor rod 1, and the grouting stop mechanism further includes a grouting stop plate 21 (a steel plate) slidingly connected on the grouting anchor rod 1, and a resisting nut 22 threadedly connected on the grouting anchor rod 1 and resisting the grouting stop plate 21. The grouting stop plate 21 is supported on the slope surface and fixed by the resisting nut 22.
[0065] Of course, the above description is not a limitation of the utility model, and the utility model is not limited to the above examples, and the changes, modifications, additions or replacements made by the technical personnel in the technical field within the essential scope of the utility model should also belong to the protection scope of the utility model.
Claims
1. A hollow mortar anchor structure for gravel and pebble strata, characterized in that, This includes grouting anchors with hollow internal structures; The outer end of the grouting anchor is equipped with a grout-stopping mechanism, and the inner end of the grouting anchor is equipped with a drill bit structure. The drill bit structure includes a reaming drill bit, which has a plurality of reaming arm slots, and a reaming arm cutter is hinged to the reaming arm slots. The reaming arm cutter has a toothed structure integrally formed on it. The reaming arm slot is equipped with a locking structure to lock and position the reaming arm cutter's swing amplitude; The locking structure includes a pair of adjustable locking rods, which are respectively locked to both sides of the reaming arm; an obliquely oriented reaming cutter is fixedly connected to the reaming arm. The locking structure also includes a locking seat that is threadedly connected to the locking rod, and the locking seat is fixedly installed in the groove of the enlarged arm. The enlarged drill bit is fixedly connected to a baffle seat, and the baffle seat has a slurry discharge hole.
2. The hollow mortar anchor structure for gravel strata according to claim 1, characterized in that, The tooth-shaped structure is integrally formed on the sides of both sides of the reaming arm, and the tooth-shaped structure includes a plurality of protruding teeth integrally formed on the reaming arm.
3. The hollow mortar anchor structure for gravel strata according to claim 2, characterized in that, The protruding teeth are triangular in shape.
4. The hollow mortar anchor structure for gravel strata according to claim 1, characterized in that, The inner end of the reaming arm is fixedly connected to a pin, which is hinged to the groove of the reaming arm. The outer end of the reaming arm is welded with a triangular pointed plate.
5. The hollow mortar anchor structure for gravel strata according to claim 1, characterized in that, The locking rod has an integrally formed hexagonal convex structure.
6. The hollow mortar anchor structure for gravel strata according to claim 1, characterized in that, The baffle seat is welded inside the reaming drill bit; The partition seat is located on the outer side of the groove of the enlarged arm; Several protruding convex plates are welded to the outer wall of the partition seat.
7. The hollow mortar anchor structure for gravel strata according to claim 1, characterized in that, The grout-stopping mechanism includes a grout-stopping plug sleeved on the grouting anchor rod, and the grout-stopping mechanism also includes a grout-stopping plate slidably connected to the grouting anchor rod, with an abutting nut threaded onto the grouting anchor rod to abut the grout-stopping plate.
8. The hollow mortar anchor structure for gravel strata according to claim 7, characterized in that, The grout stopper is conical in shape.
9. The hollow mortar anchor structure for gravel strata according to claim 1, characterized in that, The grouting anchor is connected to several small grout discharge pipes, and the pipe body of the small grout discharge pipes abuts against the outer wall of the grouting anchor. The grout drainage pipes are distributed in several layers along the length of the grouting anchor rod, with each layer of grout drainage pipes distributed circumferentially.