High-pressure jet grouting anchor cable end and drilling tool

Abstract

The utility model provides a high-pressure jet grouting anchor cable end and a drilling tool, and belongs to the technical field of deep foundation pit construction supporting, the high-pressure jet grouting anchor cable end comprises an anchor disc, an anchor cable and a sleeve, the middle of the anchor disc is provided with a via hole, and the periphery of the anchor disc is provided with anchor cable holes; the multiple anchor cables are arranged in the anchor cable holes correspondingly. The sleeve is arranged in the via hole, the interior of the sleeve is suitable for a drill bit to penetrate through, steel sheet assemblies are arranged at the two ends of the sleeve, each steel sheet assembly comprises a fixing part and a plurality of steel sheets, the first ends of the steel sheets are fixedly connected with the sleeve, and the fixing parts are arranged at the second ends of the steel sheets so as to fix the steel sheets; when the drill bit sprays slurry, slurry flowing through the steel sheet assembly can damage the fixing piece, and the multiple steel sheets are unfolded outwards. When the end head of the high-pressure jet grouting anchor cable sprays grout, the grout bursts open the steel sheet, the steel sheet is unfolded, and the steel sheet is inserted into the grout, so that the reinforcing and fixing effects are achieved, the anchor cable is more stable in the grout spraying process, the anchoring capacity is further improved, the structure is simple, and the reinforcing mode is convenient and rapid.

Description

Technical Field

[0001] The utility model relates to the technical field of deep foundation pit construction support, in particular to a high-pressure rotary spray anchor cable end and a drilling tool. Background Art

[0002] Deep foundation pit projects require slope support during construction. With the increasing number of deep foundation pit projects, a variety of different support forms have emerged in the design of foundation pit slope support. High-pressure rotary jet anchor is a prestressed anchor developed for foundation pit support in soft soil strata. During construction, hole drilling, grouting, mixing, and reinforcement insertion are completed at one time. It has the advantages of large anchor diameter, high pull-out resistance provided by a single anchor cable, and fast construction speed.

[0003] At present, one construction method of high-pressure jet anchor cable is to suspend it in the air first, and then use the drill rod to push the anchor cable to the designated position after drilling the hole, and then start high-pressure grouting on the drill bit, and finally tension, lock and seal the anchor. During the grouting process, the end is subject to a large force and is prone to shaking, which affects the construction efficiency. Utility Model Content

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the defect of the high-pressure rotary grouting anchor cable in the prior art that it is easy to shake during the grouting process, thereby affecting the construction efficiency, thereby providing a high-pressure rotary grouting anchor cable end and drilling tool.

[0005] In order to solve the above technical problems, the utility model provides a high-pressure rotary spray anchor cable end, comprising:

[0006] An anchor plate, wherein a through hole is provided in the middle of the anchor plate, and anchor cable holes are provided around the anchor plate;

[0007] A plurality of anchor cables are respectively arranged in the anchor cable holes;

[0008] A casing is arranged in the through hole, the interior of the casing is suitable for a drill bit to pass through, a steel sheet assembly is arranged at both ends of the casing, the steel sheet assembly includes a fixing member and a plurality of steel sheets, a first end of the steel sheet is fixedly connected to the casing, and the fixing member is arranged at the second end of the steel sheet to fix the plurality of steel sheets;

[0009] When the drill bit is spraying, the slurry flowing through the steel sheet assembly can destroy the fixing member and cause the plurality of steel sheets to spread outward.

[0010] Optionally, a plurality of the steel sheets are evenly spaced and arranged along the circumferential direction of the sleeve.

[0011] Optionally, there are at least three steel sheets in the steel sheet assembly.

[0012] Optionally, after the multiple steel sheets are unfolded, a conical cavity structure is formed inside the multiple steel sheets.

[0013] Optionally, the fixing member is a rope loop structure, and the fixing member fixes the plurality of steel sheets simultaneously.

[0014] Optionally, the fixing piece is made of plastic or cotton and linen.

[0015] Optionally, the sleeve and the anchor plate are fixedly connected by welding, or fixedly connected by flange bolts.

[0016] Optionally, the steel sheet and the sleeve are fixed by welding.

[0017] Optionally, a connecting bolt is provided on the end surface of the anchor plate at a position corresponding to the anchor cable hole, and the anchor cable and the connecting bolt are threadedly connected.

[0018] The utility model also provides a high-pressure rotary jet anchor cable drilling tool, comprising a drill rod, a drill bit and any one of the above-mentioned high-pressure rotary jet anchor cable end heads, wherein the drill bit is arranged at the end of the drill rod and the drill bit coaxially passes through the casing.

[0019] The technical solution of the utility model has the following advantages:

[0020] 1. The high-pressure rotary spray anchor cable end provided by the utility model comprises an anchor plate, an anchor cable and a casing, wherein the casing is arranged in a through hole, and steel sheet assemblies are arranged at both ends of the casing, and the steel sheet assemblies comprise steel sheets and fixing parts. When there is no grouting, a plurality of steel sheets are relatively fixed under the action of the fixing parts, and the penetration of the drill bit is not affected. During grouting, the fixing parts are destroyed under the action of force, and the slurry flushes the steel sheets open, so that the steel sheets are unfolded, and the steel sheets are inserted into the mud, which plays a role of reinforcement and fixing, making the anchor cable more stable during the grouting process, and further improving the anchoring capacity, with a simple structure and a convenient and quick reinforcement method.

[0021] 2. The high-pressure rotary spray anchor cable end provided by the utility model has a plurality of steel sheets evenly spaced and arranged along the circumferential direction of the casing, so that the reinforcement on all sides is uniform and stable, and the effect is better.

[0022] 3. The high-pressure rotary spray anchor cable end provided by the utility model has a fixing part in the form of a rope loop structure, which fixes a plurality of steel sheets at the same time. The arrangement of the rope loop structure facilitates timely disconnection or disengagement when affected by slurry, thereby facilitating the unfolding of the steel sheets. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A structural schematic diagram of a specific implementation of a high-pressure rotary spray anchor cable end provided in an embodiment of the utility model;

[0025] Figure 2 for Figure 1 A schematic diagram of the structure of the anchor plate;

[0026] Figure 3 for Figure 1 Schematic diagram of the structure of the steel sheet unfolded;

[0027] Figure 4 A structural schematic diagram of a specific implementation of a high-pressure rotary jet anchor cable drilling tool provided in an embodiment of the utility model;

[0028] Figure 5 for Figure 4 Schematic diagram of the structure of the drill rod and drill bit.

[0029] Description of reference numerals:

[0030] 1. Anchor plate; 2. Through hole; 3. Anchor cable hole; 4. Anchor cable; 5. Casing; 6. Drill bit; 7. Steel sheet assembly; 8. Fixing piece; 9. Steel sheet; 10. Connecting bolt; 11. Drill rod. DETAILED DESCRIPTION

[0031] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0035] The high-pressure rotary grouting anchor cable end provided in this embodiment is used in a high-pressure rotary grouting anchor cable drilling tool and is used in deep foundation pit projects to support slopes.

[0036] like Figures 1 to 3 As shown, a specific implementation manner of the high-pressure rotary spray anchor cable end provided in this embodiment includes an anchor plate 1, an anchor cable 4 and a casing 5, wherein a through hole 2 is provided in the middle of the anchor plate 1, and anchor cable holes 3 are provided around the anchor plate 1; there are multiple anchor cables 4, which are respectively arranged in the anchor cable holes 3; the casing 5 is arranged in the through hole 2, and the interior of the casing 5 is suitable for a drill bit 6 to pass through, and steel sheet assemblies 7 are arranged at both ends of the casing 5, and the steel sheet assembly 7 includes a fixing part 8 and multiple steel sheets 9, a first end of the steel sheet 9 is fixedly connected to the casing 5, and the fixing part 8 is arranged at the second end of the steel sheet 9 to fix the multiple steel sheets 9; when the drill bit 6 is spraying, the slurry flowing through the steel sheet assembly 7 can destroy the fixing part 8 and cause the multiple steel sheets 9 to expand outward.

[0037] During spraying, the fixing part 8 is destroyed under the action of force, and the slurry flushes the steel sheet 9, so that the steel sheet 9 is unfolded and inserted into the mud, which plays a role of reinforcement and fixation, making the anchor cable more stable during the spraying process and further improving the anchoring capacity. The structure is simple and the reinforcement method is convenient and fast.

[0038] Specifically, Figure 2 As shown, the anchor plate 1 is a disc-shaped structure, and the anchor holes 3 are evenly spaced around the anchor plate 1. In one embodiment, there are three anchor holes 3. The anchor cable 4 is a steel strand. The thickness of the steel sheet 9 is 4 mm and can be unfolded under the action of external force. The length direction of the steel sheet 9 is parallel to the length direction of the casing 5. The first end of the steel sheet 9 is fixed on the outer wall of the casing 5 and will not affect the penetration of the drill bit 6. The through hole 2 is arranged in the middle position of the casing 5.

[0039] like Figure 1 and Figure 3 As shown, in the high-pressure rotary spray anchor cable end provided in this embodiment, a plurality of steel sheets 9 are evenly spaced and arranged along the circumferential direction of the casing 5, so that the reinforcement on all sides is uniform and stable, and the effect is better.

[0040] like Figure 3 As shown, in the high-pressure rotary spray anchor cable end provided in this embodiment, the steel sheet assembly 7 has at least three steel sheets 9 , and the more steel sheets 9 there are, the better the reinforcement capability.

[0041] like Figure 3 As shown, the high-pressure rotary spray anchor cable end provided in this embodiment, after the multiple steel sheets 9 are unfolded, a conical cavity structure is formed inside the multiple steel sheets 9. When the fixed state of the steel sheets 9 in the mud is an oblique insertion state, the reinforcement effect is better.

[0042] like Figure 1 As shown, in the high-pressure jet-sprayed anchor cable end provided in this embodiment, the fixing member 8 is a rope loop structure, and the fixing member 8 simultaneously fixes a plurality of the steel sheets 9. The setting of the rope loop structure facilitates timely disconnection or disengagement when subjected to the action of the slurry, so as to facilitate the deployment of the steel sheets 9.

[0043] The high-pressure rotary spray anchor cable end provided in this embodiment has the fixing member 8 made of plastic or cotton and linen material, which can fix the steel sheet 9 at the beginning and can also be disconnected when subjected to external force.

[0044] In the high-pressure jet-sprayed anchor cable end provided in this embodiment, the sleeve 5 and the anchor plate 1 are fixedly connected by welding or by flange bolts.

[0045] In the high-pressure jet-sprayed anchor cable end provided in this embodiment, the steel sheet 9 and the sleeve 5 are fixed by welding. In addition, as an alternative embodiment, the steel sheet 9 can also be connected to the sleeve 5 by screws.

[0046] like Figure 1 As shown, in the high-pressure rotary spray anchor cable end provided in this embodiment, a connecting bolt 10 is provided on the end surface of the anchor plate 1 corresponding to the anchor cable hole 3, and the anchor cable 4 is threadedly connected to the connecting bolt 10.

[0047] By fixing with the connecting bolts 10, the connection method is simple and easy to install and disassemble. The connecting bolts 10 can be fixed on the anchor plate 1 in advance and directly connected to the anchor cable 4 on site. In addition, as an alternative embodiment, the anchor cable 4 can also be directly welded to the anchor plate 1.

[0048] like Figure 4 and Figure 5 As shown, this embodiment also provides a high-pressure rotary jet anchor drilling tool, including a drill rod 11, a drill bit 6 and a high-pressure rotary jet anchor end head described in any one of the above embodiments, wherein the drill bit 6 is arranged at the end of the drill rod 11, and the drill bit 6 coaxially passes through the casing 5.

[0049] The working process of the high-pressure rotary spraying anchor cable drill is as follows: drilling is performed according to the construction requirements. After the drilling is completed, the end of the high-pressure rotary spraying anchor cable is installed on the drill bit 6, and then the drill bit is pushed to the specified position. The drill bit does not need to rotate during the insertion process. The drill bit 6 is started for high-pressure grouting. During the grouting process, the fixing part 8 in the steel sheet assembly 7 is flushed open, the steel sheet 9 is unfolded, and the reinforcement is enhanced. The drill rod 11 is slowly pulled out until the construction is completed. After the strength reaches the requirement, tension locking and anchor sealing are performed.

[0050] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the present utility model.

Claims

1. A high-pressure jet-sprayed anchor cable end, characterized in that: include: An anchor plate (1), wherein a through hole (2) is provided in the middle of the anchor plate (1), and anchor cable holes (3) are provided around the anchor plate (1); A plurality of anchor cables (4) are respectively arranged in the anchor cable holes (3); A sleeve (5) is arranged in the through hole (2), the interior of the sleeve (5) is suitable for a drill bit (6) to pass through, and steel sheet assemblies (7) are arranged at both ends of the sleeve (5), the steel sheet assembly (7) comprises a fixing member (8) and a plurality of steel sheets (9), the first end of the steel sheet (9) is fixedly connected to the sleeve (5), and the fixing member (8) is arranged at the second end of the steel sheet (9) to fix the plurality of steel sheets (9); When the drill bit (6) performs grouting, the slurry flowing through the steel sheet assembly (7) can destroy the fixing member (8) and cause the plurality of steel sheets (9) to spread outward.

2. The high-pressure jet-sprayed anchor cable end according to claim 1 is characterized in that: The plurality of steel sheets (9) are evenly spaced and arranged along the circumferential direction of the sleeve (5).

3. The high-pressure jet-sprayed anchor cable end according to claim 2 is characterized in that: The number of the steel sheets (9) in the steel sheet assembly (7) is at least three.

4. The high-pressure jet-sprayed anchor cable end according to claim 1 is characterized in that: After the plurality of steel sheets (9) are unfolded, a conical cavity structure is formed inside the plurality of steel sheets (9).

5. The high-pressure jet-sprayed anchor cable end according to claim 1 is characterized in that: The fixing member (8) is a rope loop structure, and the fixing member (8) fixes a plurality of the steel sheets (9) simultaneously.

6. The high-pressure jet-sprayed anchor cable end according to claim 5 is characterized in that: The fixing piece (8) is made of plastic or cotton and linen.

7. The high-pressure jet-sprayed anchor cable end according to claim 1 is characterized in that: The sleeve (5) and the anchor plate (1) are fixedly connected by welding or by flange bolts.

8. The high-pressure jet-sprayed anchor cable end according to claim 1, characterized in that: The steel sheet (9) and the sleeve (5) are fixed by welding.

9. The high-pressure jet-sprayed anchor cable end according to claim 1, characterized in that: A connecting bolt (10) is provided on the end surface of the anchor plate (1) at a position corresponding to the anchor cable hole (3), and the anchor cable (4) and the connecting bolt (10) are threadedly connected.

10. A high-pressure jet grouting anchor cable drill, characterized in that: It comprises a drill rod (11), a drill bit (6) and a high-pressure rotary jet anchor cable end as described in any one of claims 1 to 9, wherein the drill bit (6) is arranged at the end of the drill rod (11), and the drill bit (6) coaxially passes through the casing (5).

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