Construction device for expanded-head anchor rod or anchor cable

Abstract

The invention relates to the technical field of anchor rod or anchor cable construction, in particular to a construction device for an expanded-head anchor rod or anchor cable, which comprises a tunneling mechanism; the telescopic drilling tool is arranged at the tunneling end of the tunneling mechanism; the pushing mechanism is arranged in the tunneling mechanism; according to the multi-stage reaming device, single-stage reaming or multi-stage reaming can be carried out when an expanded head anchor rod or an anchor cable is buried, the operation process is simple, after multi-stage hole forming construction, the construction efficiency is improved, and the construction cost is reduced. A corresponding single-stage or multi-stage expanded-head anchor rod or anchor cable is formed by grouting after a steel bar or a steel cable is placed in the hole, so that the anti-pulling load bearing capability of the anchor rod or anchor cable can be greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of anchor rod or anchor cable construction, in particular to a construction device for an anchor rod or anchor cable with an enlarged head. Background Art

[0002] Anchor rod / anchor cable technology has a large number of application scenarios in slope protection, foundation pit support, foundation engineering, water conservancy, transportation and other fields, especially in power transmission and transformation projects and wind power projects, where it plays a particularly important role in resisting wind loads, cable tension loads and seismic loads.

[0003] The pull-out resistance of an anchor rod or anchor cable is the core technical indicator of anchor rod technology. Compared with conventional anchor rods, enlarged head anchor rods or anchor cables can significantly improve their pull-out resistance and greatly improve the technical indicators of anchor rods or anchor cables.

[0004] The prior art discloses a method for constructing an anchor rod with a high-pressure jet enlarged head. After the anchor rod is bored, a high-pressure pipe is controlled by a drill to jet enlarge the enlarged head of the anchor hole, and then the anchor is lowered and grouting is performed.

[0005] It has the following technical problems:

[0006] The construction device has a complex structure and poor operability, and it is difficult to simultaneously carry out the construction of normal aperture anchors and enlarged head anchors.

[0007] Therefore, a construction device for enlarging the head anchor rod or anchor cable is proposed. Summary of the Invention

[0008] Therefore, the technical problem to be solved by the present invention is that the construction device has a complex structure, poor operability, and is difficult to simultaneously construct a normal aperture anchor rod and an enlarged head anchor rod.

[0009] The above technical problems are solved by the following technical solutions: The present invention proposes a construction device for enlarged head anchor rod or anchor cable, comprising:

[0010] Tunneling mechanism;

[0011] a telescopic drilling tool, provided at the excavation end of the excavation mechanism;

[0012] A pushing mechanism is provided in the excavation mechanism;

[0013] The pushing mechanism can push the telescopic drilling tool so that it is not telescopic in the direction of the drilling direction of the excavation mechanism.

[0014] In a preferred embodiment of the construction device of the enlarged head anchor rod or anchor cable of the present invention, the outer wall of the excavation end of the excavation mechanism is provided with a plurality of telescopic drilling tools with different telescopic lengths.

[0015] In a preferred embodiment of the construction device for the enlarged head anchor rod or anchor cable of the present invention, a plurality of telescopic drilling tools with different telescopic lengths are spirally distributed at the end of the excavation mechanism.

[0016] In a preferred embodiment of the construction device of the enlarged head anchor rod or anchor cable of the present invention, the telescopic lengths of the plurality of telescopic drilling tools with different telescopic lengths gradually increase from bottom to top on the tunneling mechanism.

[0017] In a preferred embodiment of the construction device for the enlarged head anchor rod or anchor cable of the present invention: the telescopic drill tool includes an outer drill bit and an inner drill bit slidably arranged on the outer drill bit, and a reset member is provided between the outer drill bit and the inner drill bit;

[0018] The resetting member can provide a pushing force so that the inner drill bit remains located inside the outer drill bit.

[0019] In a preferred embodiment of the construction device for the enlarged head anchor rod or anchor cable of the present invention: the pushing mechanism includes a pushing member provided in the excavation mechanism, and a telescopic member provided on the pushing member;

[0020] The pushing member is provided with an extrusion head.

[0021] In a preferred embodiment of the construction device for the enlarged head anchor rod or anchor cable of the present invention: the inner drill bit is provided with a sliding seat, and the sliding seat is provided with a protrusion;

[0022] The pushing member is provided with a resistance groove.

[0023] In a preferred embodiment of the construction device for the enlarged head anchor rod or anchor cable of the present invention: the telescopic member includes a housing, a piston slidably disposed in the housing, and a push rod disposed on the piston;

[0024] The push rod is connected to the pushing member;

[0025] The containing body is provided with a first entry hole and a second entry hole.

[0026] In a preferred embodiment of the construction device of the enlarged head anchor rod or anchor cable of the present invention: the excavation mechanism includes a drill rod and a spiral blade provided on the outer wall of the drill rod.

[0027] In a preferred embodiment of the construction device for the enlarged head anchor rod or anchor cable of the present invention: the drill rod is provided with a first channel and a second channel;

[0028] The first channel is connected to the first inlet hole;

[0029] The second channel is connected to the second inlet hole.

[0030] The beneficial effect of the present invention is that the present invention can perform single-stage or multi-stage hole expansion when burying enlarged head anchor rods or anchor cables. The operation process is simple. After the multi-stage hole construction, steel bars or steel cables are placed in the hole and grouting is performed to form corresponding single-stage or multi-stage enlarged head anchor rods or anchor cables, which can greatly improve their ability to withstand pull-out loads. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings of the embodiments of the present invention. Obviously, the drawings described below only relate to some embodiments of the present invention, and are not intended to limit the present invention.

[0032] Figure 1 The figure shows the structure of the telescopic drilling tool in the contracted state.

[0033] Figure 2 A cross-sectional view of the telescopic drilling tool in a retracted state is shown.

[0034] Figure 3 Shown Figure 2 A in the enlarged view.

[0035] Figure 4 The diagram shows the inner borehole length when the telescopic drill is extended.

[0036] Figure 5 It shows a structural schematic diagram of the telescopic drilling tool in the extended state.

[0037] Figure 6 A cross-sectional view of the telescopic drilling tool is shown in the extended state.

[0038] Figure 7 Shown Figure 6 Enlarged view of point B in the middle.

[0039] Figure 8 A schematic diagram of the hole expansion morphology during single-stage hole expansion is shown.

[0040] Figure 9 A schematic diagram of the hole expansion morphology during multi-stage hole expansion is shown.

[0041] In the figure: 1. Tunneling mechanism; 11. Drill rod; 12. Spiral blade; 13. First channel; 14. Second channel; 2. Telescopic drilling tool; 21. Outer drill bit; 22. Inner drill bit; 23. Reset member; 24. Sliding seat; 241. Protrusion; 3. Pushing mechanism; 31. Pushing member; 311. Extrusion head; 312. Resistance groove; 32. Telescopic member; 321. Receiving body; 322. Piston; 323. Push rod; 324. First entry hole; 325. Second entry hole. DETAILED DESCRIPTION

[0042] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below with reference to specific embodiments and the accompanying drawings.

[0043] The terms used in the present invention are those commonly used in the art in view of the functions of the present invention, but these terms may vary according to the intentions of those skilled in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the present invention. Therefore, the terms used in the specification should not be understood as simple names, but rather as the meanings of the terms and the overall description of the present invention.

[0044] Reference Figures 1 to 9 This embodiment provides a construction device for enlarging the head anchor rod or anchor cable, comprising:

[0045] The excavation mechanism 1 is used for excavating into the soil.

[0046] The telescopic drilling tool 2 is provided at the excavation end of the excavation mechanism 1; the telescopic drilling tool 2 itself has the ability to be telescopic to adjust the diameter of the drilling.

[0047] The pushing mechanism 3 is provided in the excavation mechanism 1 ; the pushing mechanism 3 can push the telescopic drilling tool 2 so that it does not extend or retract in the direction of the drilling direction of the excavation mechanism 1 .

[0048] Since the pushing mechanism 3 pushes the telescopic drill 2 to extend it, and the telescopic direction of the telescopic drill 2 is different from the drilling direction, the diameter of the borehole will increase after the telescopic drill 2 is extended. After the excavation mechanism 1 enters the soil, the diameter of the borehole is increased by the extended telescopic drill 2 according to the enlarged position of the enlarged head anchor rod or anchor cable, so that the excavation end can be enlarged. The setting of the enlarged hole can make the device suitable for enlarged head anchor rods or anchor cables. When the device is in use, it can not only face the excavation of normal apertures with conventional anchor rods, but also be suitable for single-stage or multi-stage enlarged head anchor rods or anchor cables, which can greatly improve its ability to withstand pull-out loads. Under the same pull-out resistance requirements, the enlarged head anchor rod or anchor cable can reduce its anchoring length, reduce construction difficulty and construction costs, and reduce material consumption. Therefore, the patent of the present invention has the advantages of reducing costs and increasing efficiency, being green and low-carbon, and has great promotion value.

[0049] Preferably, the outer wall of the excavation end of the excavation mechanism 1 is provided with a plurality of telescopic drilling tools 2 with different telescopic lengths.

[0050] Among them, the telescopic drilling tools 2 with different telescopic lengths can enhance the crushing and pulverizing effects when drilling, so as to pulverize the soil in the expanded area. The finer the degree of pulverization, the more conducive it is to the discharge of the soil.

[0051] At the same time, the maximum telescopic position of the telescopic drill 2 can be set according to the shape requirements of the anchor hole, so as to better assist in forming the anchor hole.

[0052] Reference Figure 2 Preferably, several telescopic drilling tools 2 with different telescopic lengths are distributed in a spiral shape at the end of the tunneling mechanism 1.

[0053] The spiral distribution setting can improve the stability of the telescopic drilling tool 2 during rotary drilling, and can achieve uniform damage to the soil, so as to facilitate better shaping of the hole expansion.

[0054] Reference Figure 2 The telescopic lengths of several telescopic drilling tools 2 with different telescopic lengths gradually increase from bottom to top on the tunneling mechanism 1.

[0055] Since the telescopic length of the telescopic drilling tool 2 gradually increases from bottom to top, a hole enlarging angle q can be formed during drilling, so that the excavation mechanism 1 can more easily penetrate into the soil and increase the depth of the hole enlarging.

[0056] During construction, the anchor holes are drilled in the above manner, and the anchor rods are placed in the anchor holes. During the grouting construction of the anchor rods or anchor cables, a secondary grouting process is implemented in the expansion sections at all levels through pre-buried small tubes to ensure that the grouting of the expansion sections at all levels is full, so as to give full play to the anchoring effect of the enlarged head and improve the pull-out resistance of the enlarged head anchor rod or anchor cable.

[0057] Reference Figures 1 to 9 As an optional embodiment, the telescopic drill tool 2 includes an outer drill bit 21 and an inner drill bit 22 slidably mounted on the outer drill bit 21. A reset member 23 is disposed between the outer drill bit 21 and the inner drill bit 22. The reset member 23 can provide a thrust force to keep the inner drill bit 22 within the outer drill bit 21. In this embodiment, the reset member 23 is a spring.

[0058] The pushing mechanism 3 includes a pushing member 31 arranged in the excavation mechanism 1, and a telescopic member 32 arranged on the pushing member 31; the telescopic member 32 itself has a telescopic function, which can push the pushing member 31 to slide inside the excavation mechanism 1, and then push the inner drill bit 22 through the pushing member 31, so that it extends from the inside of the outer drill bit 21, compressing the spring to achieve adjustment of the drill hole diameter.

[0059] An extrusion head 311 is provided on the pushing member 31. In this embodiment, the extrusion head 311 has a conical structure. The conical structure is convenient for pushing the inner drill bit 22 and for pushing out the soil at the center of the excavation mechanism 1.

[0060] A sliding seat 24 is provided on the inner drill bit 22, and a protrusion 241 is provided on the sliding seat 24; a contact groove 312 is provided on the pushing member 31, and the contact groove 312 is provided corresponding to the sliding seat 24. The contact groove 312 is used to contact the end of the sliding seat 24 to limit the retraction of the inner drill bit 22 during drilling. It should be noted that the contact groove 312 is an arc-shaped structure to facilitate the telescopic sliding of the pushing member 31 and the misalignment of the contact groove 312. The setting of the protrusion 241 can limit the maximum sliding distance of the sliding seat 24.

[0061] When reaming operation is required, the telescopic member 32 is used to control the pushing member 31 to slide down inside the tunneling mechanism 1, so that the extrusion head 311 contacts the sliding seat 24 to push the inner drill bit 22 out of the outer drill bit 21, thereby increasing the length of the telescopic drilling tool 2 and realizing the reaming operation.

[0062] Until the corresponding contact groove 312 is aligned with the corresponding sliding seat 24, when drilling, the reaction force exerted by the soil can cause the inner drill bit 22 to be subjected to a retraction force, so that the sliding seat 24 abuts against the contact groove 312, limiting the retraction of the inner drill bit 22, thereby positioning the inner drill bit 22.

[0063] It should be noted that when the extrusion head 311 extends from the inside of the tunneling mechanism 1, it can push out the soil remaining inside the tunneling mechanism 1 and press down to make the soil underneath more compact, so as to increase the hardness of the soil at the bottom of the expanded hole. When only a single-stage expansion head anchor is buried, the hardness of the bottom soil can be increased.

[0064] Reference Figures 1 to 9 As an optional embodiment: the telescopic member 32 includes a housing 321, a piston 322 slidably arranged in the housing 321, and a push rod 323 arranged on the piston 322; the push rod 323 is connected to the pushing member 31; the housing 321 is provided with a first entry hole 324 and a second entry hole 325.

[0065] In this embodiment, the first inlet hole 324 and the second inlet hole 325 are respectively provided at both ends of the accommodating body 321 , and hydraulic oil or gas medium is stored inside the accommodating body 321 .

[0066] By injecting medium into the first inlet hole 324 , the piston 322 can be moved upward, so that the push rod 323 can pull the push member 31 upward. By injecting medium into the second inlet hole 325 , the piston 322 can be moved downward, so that the push rod 323 can press the push member 31 downward.

[0067] Reference Figures 1 to 9 As an optional embodiment: the tunneling mechanism 1 includes a drill rod 11 and a spiral blade 12 provided on the outer wall of the drill rod 11.

[0068] In this embodiment, the rotation of the spiral blade 12 can cause the soil in the excavation site to be discharged outwards, thereby achieving the drilling operation.

[0069] The drill rod 11 is provided with a first channel 13 and a second channel 14 ; the first channel 13 is connected to the first entry hole 324 ; the second channel 14 is connected to the second entry hole 325 .

[0070] By injecting a medium into the first channel 13 , the piston 322 can be moved upward, and by injecting a medium into the second channel 14 , the piston 322 can be moved downward, thereby achieving control over the telescopic sliding of the pusher 31 .

[0071] It should be noted that, referring to Figure 1 and Figure 2 The diameter of the hole when the drill rod 11 and the spiral blade 12 rotate is d=2r, where d is the diameter of the spiral blade 12 and r is the radius of the spiral blade 12. Figure 5 and Figure 6 During the hole expansion construction, the inner drill bit 22 of the telescopic drill tool 2 is extended, and the distance between the uppermost end of the inner drill bit 22 and the axis of the drill rod 11 is R. Therefore, the maximum diameter of the hole expansion is D=2R.

[0072] According to actual needs, use the patent of this invention to carry out single-stage or multi-stage hole expansion, refer to Figure 8 , is a schematic diagram of the hole expansion shape during single-stage hole expansion, the depth of the hole expansion is H, after the inner drill bit 22 is extended, the excavation mechanism 1 is excavated into the soil to a depth of H.

[0073] Reference Figure 9 , is a schematic diagram of the hole enlarging form during multi-stage hole enlarging. The inner drill bit 22 can be extended or retracted according to different drilling depths to achieve multi-stage hole enlarging. Among them, when the inner drill bit 22 is in the first extended state, the excavation mechanism 1 is further excavated into the soil to a depth of H1, and then the inner drill bit 22 is retracted into the outer drill bit 21. The excavation mechanism 1 is then excavated into the soil to a certain depth and the inner drill bit 22 is extended a second time. At this time, the excavation depth is L-H1. Finally, the excavation mechanism 1 is further excavated into the soil to a depth of H2 to complete the excavation operation. At this time, the inner drill bit 22 is retracted and the equipment is taken out to form the following Figure 9 The enlarged hole shown is used to place multi-stage enlarged head anchor rods or anchor cables.

[0074] After multi-stage drilling construction, steel bars or steel cables are placed in the holes and grouting is performed to form corresponding single-stage or multi-stage enlarged head anchor rods or anchor cables, which can greatly improve their ability to withstand pull-out loads.

[0075] Finally, it should be pointed out that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways without departing from the scope of the present invention.

Claims

1. A construction device for an enlarged head anchor rod or anchor cable, characterized in that: include, Excavation mechanism (1); A telescopic drilling tool (2) is provided at the excavation end of the excavation mechanism (1); A pushing mechanism (3) is provided in the excavation mechanism (1); The pushing mechanism (3) can push the telescopic drilling tool (2) so that it does not extend or retract in the direction of the drilling direction of the excavation mechanism (1).

2. The construction device for an enlarged head anchor rod or anchor cable according to claim 1, characterized in that: The outer wall of the excavation end of the excavation mechanism (1) is provided with a plurality of telescopic drilling tools (2) with different telescopic lengths.

3. The construction device for enlarged head anchor rod or anchor cable according to claim 2, characterized in that: A plurality of telescopic drilling tools (2) with different telescopic lengths are distributed in a spiral manner at the end of the excavation mechanism (1).

4. The construction device for an enlarged head anchor rod or anchor cable according to claim 2 or 3, characterized in that: The telescopic lengths of a plurality of telescopic drilling tools (2) with different telescopic lengths gradually increase from bottom to top on the excavation mechanism (1).

5. The construction device for enlarged head anchor rod or anchor cable according to claim 4, characterized in that: The telescopic drill tool (2) comprises an outer drill bit (21) and an inner drill bit (22) slidably arranged on the outer drill bit (21), and a reset member (23) is provided between the outer drill bit (21) and the inner drill bit (22); The reset member (23) can provide a thrust so that the inner drill bit (22) remains located inside the outer drill bit (21).

6. The construction device for the enlarged head anchor rod or anchor cable according to claim 5, characterized in that: The pushing mechanism (3) comprises a pushing member (31) provided in the excavation mechanism (1), and a telescopic member (32) provided on the pushing member (31); The pushing member (31) is provided with an extrusion head (311).

7. The construction device for enlarged head anchor rod or anchor cable according to claim 6, characterized in that: The inner drill bit (22) is provided with a sliding seat (24), and the sliding seat (24) is provided with a protrusion (241); The pushing member (31) is provided with a resistance groove (312).

8. The construction device for enlarged head anchor rod or anchor cable according to claim 7, characterized in that: The telescopic member (32) includes a housing (321), a piston (322) slidably disposed in the housing (321), and a push rod (323) disposed on the piston (322); The push rod (323) is connected to the pushing member (31); The accommodating body (321) is provided with a first entry hole (324) and a second entry hole (325).

9. The construction device for enlarged head anchor rod or anchor cable according to claim 8, characterized in that: The excavation mechanism (1) comprises a drill rod (11) and a spiral blade (12) arranged on the outer wall of the drill rod (11).

10. The construction device for the enlarged head anchor rod or anchor cable according to claim 9, characterized in that: The drill rod (11) is provided with a first channel (13) and a second channel (14); The first channel (13) is connected to the first inlet hole (324); The second channel (14) is connected to the second inlet hole (325).

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