CN110714463A - Mechanical expanding anti-floating anchor rod and construction method thereof - Google Patents
Mechanical expanding anti-floating anchor rod and construction method thereof Download PDFInfo
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- CN110714463A CN110714463A CN201911093661.2A CN201911093661A CN110714463A CN 110714463 A CN110714463 A CN 110714463A CN 201911093661 A CN201911093661 A CN 201911093661A CN 110714463 A CN110714463 A CN 110714463A
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- 238000010276 construction Methods 0.000 title claims abstract description 25
- 238000005553 drilling Methods 0.000 claims abstract description 39
- 239000000463 material Substances 0.000 claims abstract description 8
- 239000000758 substrate Substances 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 12
- 239000011440 grout Substances 0.000 claims description 7
- 230000002787 reinforcement Effects 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 2
- 238000004873 anchoring Methods 0.000 description 10
- 239000002689 soil Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 239000002699 waste material Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000012779 reinforcing material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/10—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure
- E02D31/12—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure against upward hydraulic pressure
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- Engineering & Computer Science (AREA)
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- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Piles And Underground Anchors (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a mechanical expanding anti-floating anchor rod and a construction method thereof, relates to the technical field of anti-floating anchor rods, and solves the problems that an equal-diameter anti-floating anchor rod is easy to form quality and potential safety hazards, is complex in construction and operation and the like, and the technical scheme is characterized in that: comprises a hollow drill rod, an expandable drill bit and a drilling machine device; an anchor rod rib and a grouting pipe can be arranged in the hollow drill rod, and the bottom ends of the anchor rod rib and the grouting pipe are fixedly connected with an anti-blocking plate; the drilling machine device is provided with a rotating device fixedly connected with the hollow drill rod, and a telescopic device fixedly connected with the anchor rod rib material and the grouting pipe is arranged in the rotating device; the diameter-expandable drill bit comprises an annular main body and a diameter-expandable blade part, wherein the annular main body is sleeved with the hollow drill rod, the annular main body is annularly provided with a plurality of movable cavities, one end of the diameter-expandable blade part penetrates through the movable cavities and is hinged with the hollow drill rod, and the other end of the diameter-expandable blade part protrudes out of the outer wall of the annular main body.
Description
Technical Field
The invention relates to the technical field of anti-floating anchor rods, in particular to a mechanical expanding type anti-floating anchor rod and a construction method thereof.
Background
The anti-floating anchor is one kind of anti-floating measure for underground structure in building engineering, and is one structural member set to resist the upward shift of the building.
The conventional anti-floating anchor rod in anti-floating engineering is limited by drilling equipment, and the diameters of anchor bodies in the length range of the conventional anti-floating anchor rod are generally basically the same, namely the equal-diameter anti-floating anchor rod has the following defects:
1. the construction of the anchor rod loses the constraint of overlying soil due to the lack of the surface foundation, and the lateral resistance is lost after the construction disturbance, so that the length of the anchor rod is increased by 500-1000mm compared with the designed and calculated length to make up, and unnecessary engineering waste is caused;
2. according to the construction of a common post-grouting process, the anchoring body is often good in lower effect and poor in upper effect, and often cannot meet the design requirements due to the structural quality defect of the anchoring body, so that quality and potential safety hazards are formed;
3. because the diameter of the anchor rod is limited, the anti-pulling force formed in the soil layer is also limited, the length of the anchor rod is often required to be increased or the number of the anchor rods is required to be increased, waste is inevitably caused, and the waste is more prominent particularly when the required anti-floating force is smaller;
4. at present, the diameter-expanding anchor rod is generally adopted to spray cement soil or a bag type anchor rod, and a drill bit needs to be replaced in the diameter-expanding process, so that the operation of the diameter-expanding anchor rod is complex.
Therefore, how to design a mechanical expanding anti-floating anchor rod and a construction method thereof is a problem which needs to be solved urgently at present.
Disclosure of Invention
The invention aims to provide a mechanical expanding anti-floating anchor rod, which has the effects of reducing the input cost of the application of the anti-floating anchor rod, increasing the anti-pulling bearing capacity, improving the application quality and being convenient to operate.
The technical purpose of the invention is realized by the following technical scheme: a mechanical expanding type anti-floating anchor rod comprises a hollow drill rod, an expandable drill bit and a drilling machine device, wherein the expandable drill bit is fixedly connected with the bottom end of the hollow drill rod, and the drilling machine device is fixedly connected with the top end of the hollow drill rod;
an anchor rod rib and a grouting pipe are arranged in the hollow drill rod in a penetrating mode, and the bottom ends of the anchor rod rib and the grouting pipe are fixedly connected with an anti-blocking plate which is abutted against the bottom end of the expandable drill bit;
the drilling machine device is provided with a rotating device fixedly connected with the hollow drill rod, and a telescopic device fixedly connected with the anchor rod rib material and the grouting pipe is arranged in the rotating device;
the diameter-expandable drill bit comprises an annular main body and a plurality of diameter-expandable blades, wherein the annular main body is sleeved with the hollow drill rod, the annular main body is annularly provided with a plurality of movable cavities along the circumferential direction of the annular main body, one end of each diameter-expandable blade penetrates through each movable cavity and is hinged with the hollow drill rod, and the other end of each diameter-expandable blade protrudes out of the outer wall of the annular main body.
By adopting the technical scheme, the anti-floating anchor rod with the equal-diameter anchoring body and the expanded-diameter anchoring body integrated is formed, so that the situation that the anti-floating anchor rod loses side resistance after construction disturbance due to the lack of overlying soil constraint of a surface foundation during construction is avoided; the uplift bearing capacity of the anti-floating anchor rod is increased, and the situation that the uplift bearing capacity of the anti-floating anchor rod is compensated by increasing the design length of the anti-floating anchor rod is reduced; in the process of applying the anti-floating anchor rod, the steps of replacing the drill bit are reduced, so that the application and the operation of the anti-floating anchor rod are convenient.
The invention is further configured to: the hollow drill rod is symmetrically provided with an upper substrate and a lower substrate which are positioned on the upper side and the lower side of the annular main body, and the upper substrate and the lower substrate are respectively abutted against the upper side and the lower side of the annular main body.
Through adopting above-mentioned technical scheme, utilize upper substrate and infrabasal plate, be convenient for restrict annular main part and remove along cavity drilling rod axis direction, improved the stability that annular main part used.
The invention is further configured to: the upper substrate, the lower substrate and the annular main body are all provided with a plurality of auxiliary blade parts along the circumferential direction of the annular main body.
By adopting the technical scheme, the auxiliary blade part is utilized, so that the frictional resistance between the annular main body and the stratum side wall is conveniently enhanced, the diameter switching operation of the diameter-expandable drill bit is convenient, and the drilling efficiency of the diameter-expandable drill bit is enhanced.
The invention is further configured to: the auxiliary blade parts of the upper substrate and the lower substrate are arranged in a staggered mode.
By adopting the technical scheme, the drilling efficiency of the drill bit capable of expanding the diameter is further enhanced.
The invention is further configured to: the rotating device is provided with a connecting sleeve in threaded fit with the outer wall of the hollow drill rod, the outer wall of the hollow drill rod is annularly provided with a fixing plate, and the fixing plate is connected with the hollow drill rod through a fixing bolt.
By adopting the technical scheme, the connecting sleeve is in threaded fit with the hollow drill rod, so that the hollow drill rod and the rotating device are convenient to connect and operate.
The invention is further configured to: the telescopic device is provided with a telescopic rod which is in sealed insertion connection with the top end of the hollow drill rod.
By adopting the technical scheme, the grouting pipe and the anchor rod rib material are convenient to install and detach.
The invention also aims to provide a construction method of the mechanical expanding anti-floating anchor rod, which has the effects of reducing the input cost of the application of the anti-floating anchor rod, increasing the uplift bearing capacity, improving the application quality and being convenient to operate.
The technical purpose of the invention is realized by the following technical scheme: a construction method of a mechanical expanding anti-floating anchor rod comprises the following steps:
s1: installing a drilling machine, namely installing the anchor rod rib and the grouting pipe in a hollow drill rod, then fixedly connecting the top end of the hollow drill rod with a rotating device of the drilling machine device, and fixedly connecting the anchor rod rib and the grouting pipe with a telescopic device in the rotating device;
s2: drilling a straight hole section, and downwards starting a drilling machine device and a forward starting rotating device to enable an expandable drill bit at the bottom end of a hollow drill rod to drill a foundation to the designed depth of the straight hole section to form a straight hole section;
s3: drilling a hole in the diameter expanding section, wherein after the rotating device is reversely started, the diameter-expandable drill bit drills into the foundation to the designed depth of the diameter expanding section after the diameter of the drilled hole is expanded to form a diameter expanding hole;
s4: grouting the expanded hole, upwards starting a drilling machine device and a telescopic device, lifting and separating a hollow drill rod along the axial direction of the anchor rod rib and the grouting pipe in the grouting process of the grouting pipe, and simultaneously stirring grout in the expanded hole by using an expanded drill bit;
s5: grouting the straight section hole, when the diameter-expandable drill bit rises to the straight section hole, starting the rotating device in the forward direction, and stirring the grout in the straight section hole after the diameter of the diameter-expandable drill bit is reduced;
s6: high-pressure grouting, namely taking out the hollow drill rod and the expandable drill bit when grout overflows from the straight section hole pipe hole, and then performing secondary high-pressure grouting on the straight section hole and the expanded hole for reinforcement;
s7: when the construction of the anti-floating anchor rod reaches the design standard, a connecting structure and an anti-seepage structure are constructed at the top end of the anti-floating anchor rod.
By adopting the technical scheme, in the process of constructing the anti-floating anchor rod, the hollow drill rod is rotated forward and backward to realize diameter-variable drill bit diameter reduction, so that the steps of replacing the drill bit are reduced, and the constructing efficiency of the anti-floating anchor rod is improved.
In conclusion, the invention has the following beneficial effects: an anti-floating anchor rod with an equal-diameter anchoring body and an expanded-diameter anchoring body integrated is formed, so that the situation that the anti-floating anchor rod loses side resistance after construction disturbance due to lack of overlying soil constraint of a surface foundation during construction is avoided; the uplift bearing capacity of the anti-floating anchor rod is increased, and the situation that the uplift bearing capacity of the anti-floating anchor rod is compensated by increasing the design length of the anti-floating anchor rod is reduced; in the process of constructing the anti-floating anchor rod, the steps of replacing the drill bit are reduced, so that the construction operation of the anti-floating anchor rod is convenient; the auxiliary blade part is utilized to conveniently enhance the frictional resistance between the annular main body and the stratum side wall, so that the diameter switching operation of the diameter-expandable drill bit is convenient, and the drilling efficiency of the diameter-expandable drill bit is enhanced.
Drawings
FIG. 1 is a schematic structural view of a hollow drill rod in example 1 of the present invention;
FIG. 2 is a schematic structural view of an expandable drill bit according to example 1 of the present invention;
FIG. 3 is a schematic structural view of a straight hole manufactured in embodiment 2 of the present invention;
FIG. 4 is a schematic structural view of an enlarged hole in example 2 of the present invention;
fig. 5 is a flowchart in embodiment 2 of the present invention.
In the figure: 1. a drilling rig device; 11. a rotating device; 12. a telescoping device; 13. a connecting sleeve; 14. a fixing plate; 15. a telescopic rod; 2. a hollow drill rod; 21. a grouting pipe; 22. anchor rod reinforcement; 23. an anti-blocking plate; 3. an expandable drill bit; 31. an upper substrate; 32. a lower substrate; 33. auxiliary blade parts; 34. an annular body; 35. expanding the diameter of the blade; 36. a movable cavity; 4. a straight section hole; 41. and (4) expanding the diameter hole.
Detailed Description
The present invention is described in further detail below with reference to figures 1-5.
Example 1: a mechanical expanding type anti-floating anchor rod comprises a hollow drill rod 2, an expandable drill bit 3 and a drilling machine device 1, wherein the expandable drill bit 3 is fixedly connected with the bottom end of the hollow drill rod 2, and the drilling machine device 1 is fixedly connected with the top end of the hollow drill rod 2, as shown in figures 1 and 2. An anchor rod rib 22 and a grouting pipe 21 penetrate through the hollow drill rod 2, and an anti-blocking plate 23 which is abutted against the bottom end of the expandable drill bit 3 is fixedly connected to the bottom ends of the anchor rod rib 22 and the grouting pipe 21. The drilling machine device 1 is provided with a rotating device 11 fixedly connected with the hollow drill rod 2, and a telescopic device 12 fixedly connected with an anchor rod rib material 22 and a grouting pipe 21 is arranged in the rotating device 11. The diameter-expandable drill bit 3 comprises an annular main body 34 and a plurality of diameter-expandable blade parts 35, wherein the annular main body 34 is sleeved with the hollow drill rod 2, the annular main body 34 is annularly provided with a plurality of movable cavities 36 along the circumferential direction of the annular main body, one end of each diameter-expandable blade part 35 penetrates through each movable cavity 36 to be hinged with the hollow drill rod 2, and the other end of each diameter-expandable blade part protrudes out of the outer wall of the annular main body 34. In the present embodiment, four enlarged diameter blades 35 and four movable cavities 36 are used. In the present embodiment, the drilling device 1, the rotating device 11 and the telescoping device 12 are all devices made of conventional anti-floating bolts. The equal-diameter anchoring body and the expanded-diameter anchoring body are integrated to form the anti-floating anchor rod, so that the situation that the anti-floating anchor rod loses side resistance after being disturbed by construction due to the fact that the anti-floating anchor rod is lack of overlying soil for constraint during construction of a surface foundation is avoided. The uplift bearing capacity of the anti-floating anchor rod is increased, and the situation that the uplift bearing capacity of the anti-floating anchor rod is compensated by increasing the design length of the anti-floating anchor rod is reduced. In the process of applying the anti-floating anchor rod, the steps of replacing the drill bit are reduced, so that the application and the operation of the anti-floating anchor rod are convenient.
As shown in fig. 1, the hollow drill rod 2 is symmetrically provided with an upper base plate 31 and a lower base plate 32 on upper and lower sides of an annular body 34, and the upper base plate 31 and the lower base plate 32 are abutted against the upper and lower sides of the annular body 34, respectively. By utilizing the upper base plate 31 and the lower base plate 32, the annular body 34 is convenient to limit to move along the axial direction of the hollow drill rod 2, and the use stability of the annular body 34 is improved.
As shown in fig. 1 and 2, the upper substrate 31, the lower substrate 32, and the ring main body 34 are provided with a plurality of sub blades 33 along their circumferential directions. In the present embodiment, four auxiliary blades 33 are used for the upper base plate 31, the lower base plate 32 and the annular main body 34, and the number of the auxiliary blades 33 can be increased or decreased according to the application requirements of the anti-floating anchor. With the auxiliary blade portion 33, it is convenient to enhance the frictional resistance of the annular main body 34 with the formation side wall, so that the diameter switching operation of the expandable drill bit 3 is convenient, and the drilling efficiency of the expandable drill bit 3 is enhanced.
As shown in fig. 1, the minor blades 33 of the upper substrate 31 and the lower substrate 32 are staggered to enhance the drilling efficiency of the expandable drill 3.
As shown in fig. 1, the rotating device 11 is provided with a connecting sleeve 13 in threaded fit with the outer wall of the hollow drill rod 2, a fixing plate 14 is annularly arranged on the outer wall of the hollow drill rod 2, and the fixing plate 14 is connected with the hollow drill rod 2 through a fixing bolt. The connecting sleeve 13 is matched with the hollow drill rod 2 in a threaded mode, so that the hollow drill rod 2 is connected with the rotating device 11 conveniently.
As shown in fig. 1, the telescopic device 12 is provided with a telescopic rod 15 which is in sealed insertion connection with the top end of the hollow drill rod 2, so that the grouting pipe 21 and the anchor rod reinforcement 22 are convenient to install and detach.
Example 2: a construction method of a mechanical expanding anti-floating anchor rod, as shown in fig. 1 and 5, comprising the following steps:
step one, installing a drilling machine. The anchor rod reinforcing material 22 and the grouting pipe 21 are installed in the hollow drill rod 2, then the top end of the hollow drill rod 2 is fixedly connected with the rotating device 11 of the drilling machine device 1, and the anchor rod reinforcing material 22 and the grouting pipe 21 are fixedly connected with the telescopic device 12 in the rotating device 11.
And step two, drilling the straight hole section as shown in figure 3. The drilling machine device 1 is started downwards and the rotating device 11 is started forwards, so that the diameter-expandable drill bit 3 at the bottom end of the hollow drill rod 2 can drill into the ground to the designed depth of the straight hole section to form a straight section hole 4.
And step three, drilling holes on the diameter expanding section as shown in figure 4. And after the rotating device 11 is reversely started, the diameter-expandable drill bit 3 drills the foundation to the designed depth of the diameter-expanded section after the drilling diameter is expanded to form a diameter-expanded hole 41.
And step four, grouting the diameter expanding hole 41 as shown in fig. 4. After the drilling machine device 1 and the expansion device 12 are started upwards, in the process of grouting the grouting pipe 21, the hollow drill rod 2 is lifted and separated along the axial direction of the anchor rod rib 22 and the grouting pipe 21, and simultaneously, the diameter-expanding drill bit 3 can stir the grout in the diameter-expanding hole 41.
And step five, as shown in fig. 3, grouting the straight section hole 4. When the diameter-expandable drill bit 3 rises to the straight section hole 4, the rotating device 11 is started in the forward direction, and slurry in the straight section hole 4 is stirred after the diameter of the diameter-expandable drill bit 3 is reduced.
And step six, high-pressure grouting. When the grout overflows from the pipe hole of the straight section hole 4, the hollow drill rod 2 and the diameter-expandable drill bit 3 are taken out, and then secondary high-pressure grouting is carried out on the straight section hole 4 and the diameter-expandable hole 41 for reinforcement.
And seventhly, when the construction of the anti-floating anchor rod reaches the design standard, constructing a connecting structure and an anti-seepage structure at the top end of the anti-floating anchor rod.
In the process of constructing the anti-floating anchor rod, the hollow drill rod 2 is rotated in the forward and reverse directions, and the annular main body 34 is rotated along the circumferential direction of the hollow drill rod 2 through the friction resistance of the auxiliary blade part 33, the annular main body 34 and the side wall of the foundation, so that the diameter change of the diameter-expandable drill bit 3 is realized, the steps of replacing the drill bit are reduced, and the constructing efficiency of the anti-floating anchor rod is improved.
The working principle is as follows: the equal-diameter anchoring body and the expanded-diameter anchoring body are integrated to form the anti-floating anchor rod, so that the situation that the anti-floating anchor rod loses side resistance after being disturbed by construction due to the fact that the anti-floating anchor rod is lack of overlying soil for constraint during construction of a surface foundation is avoided. The uplift bearing capacity of the anti-floating anchor rod is increased, and the situation that the uplift bearing capacity of the anti-floating anchor rod is compensated by increasing the design length of the anti-floating anchor rod is reduced. In the process of applying the anti-floating anchor rod, the steps of replacing the drill bit are reduced, so that the application and the operation of the anti-floating anchor rod are convenient.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (7)
1. The utility model provides a machinery hole enlargement type anti-floating anchor rod which characterized by: the drill comprises a hollow drill rod (2), an expandable drill bit (3) and a drilling machine device (1), wherein the expandable drill bit (3) is fixedly connected with the bottom end of the hollow drill rod (2), and the drilling machine device (1) is fixedly connected with the top end of the hollow drill rod (2);
an anchor rod rib (22) and a grouting pipe (21) penetrate through the hollow drill rod (2), and the bottom ends of the anchor rod rib (22) and the grouting pipe (21) are fixedly connected with an anti-blocking plate (23) which is abutted against the bottom end of the expandable drill bit (3);
the drilling machine device (1) is provided with a rotating device (11) fixedly connected with the hollow drill rod (2), and a telescopic device (12) fixedly connected with an anchor rod rib material (22) and a grouting pipe (21) is arranged in the rotating device (11);
the diameter-expandable drill bit (3) comprises an annular main body (34) and a plurality of diameter-expandable blades (35), wherein the annular main body (34) is sleeved with the hollow drill rod (2), a plurality of movable cavities (36) are annularly arranged on the annular main body (34) along the circumferential direction of the annular main body, one end of each diameter-expandable blade (35) penetrates through each movable cavity (36) and is hinged with the hollow drill rod (2), and the other end of each diameter-expandable blade protrudes out of the outer wall of the annular main body (34).
2. The mechanical expanding anti-floating anchor rod of claim 1, wherein: the hollow drill rod (2) is symmetrically provided with an upper substrate (31) and a lower substrate (32) which are positioned on the upper side and the lower side of the annular main body (34), and the upper substrate (31) and the lower substrate (32) are respectively abutted against the upper side and the lower side of the annular main body (34).
3. The mechanical expanding anti-floating anchor rod of claim 2, wherein: the upper substrate (31), the lower substrate (32) and the annular main body (34) are all provided with a plurality of auxiliary blade parts (33) along the circumferential direction of the annular main body.
4. The mechanical expanding anti-floating anchor rod of claim 3, wherein: the auxiliary blade parts (33) of the upper substrate (31) and the lower substrate (32) are arranged in a staggered mode.
5. The mechanical expanding anti-floating anchor rod of claim 1, wherein: the rotating device (11) is provided with a connecting sleeve (13) in threaded fit with the outer wall of the hollow drill rod (2), the outer wall of the hollow drill rod (2) is annularly provided with a fixing plate (14), and the fixing plate (14) is connected with the hollow drill rod (2) through a fixing bolt.
6. The mechanical expanding anti-floating anchor rod of claim 1, wherein: the telescopic device (12) is provided with a telescopic rod (15) which is in sealed insertion connection with the top end of the hollow drill rod (2).
7. A construction method of a mechanical expanding anti-floating anchor rod is characterized in that: the method is based on the mechanical expanding anti-floating anchor rod in any one of claims 1-6, and comprises the following steps:
s1: installing a drilling machine, namely installing an anchor rod rib material (22) and a grouting pipe (21) in a hollow drill rod (2), then fixedly connecting the top end of the hollow drill rod (2) with a rotating device (11) of the drilling machine device (1), and fixedly connecting the anchor rod rib material (22) and the grouting pipe (21) with a telescopic device (12) in the rotating device (11);
s2: drilling a straight hole section, and downwards starting a drilling machine device (1) and a forward starting rotating device (11) to enable an expandable drill bit (3) at the bottom end of a hollow drill rod (2) to drill a foundation to the designed depth of the straight hole section to form a straight hole section (4);
s3: drilling a hole in the diameter expanding section, wherein after the rotating device (11) is reversely started, the diameter-expandable drill bit (3) drills into the foundation to the designed depth of the diameter expanding section after the diameter of the drilled hole is expanded to form a diameter expanding hole (41);
s4: grouting the diameter expanding hole (41), upwards starting the drilling machine device (1) and the telescopic device (12), lifting and separating the hollow drill rod (2) along the axial direction of the anchor rod rib material (22) and the grouting pipe (21) in the grouting process of the grouting pipe (21), and simultaneously stirring the grout in the diameter expanding hole (41) by using the diameter expanding drill bit (3);
s5: grouting the straight section hole (4), when the diameter-expandable drill bit (3) rises to the straight section hole (4), starting the rotating device (11) in the forward direction, and stirring the slurry in the straight section hole (4) after the diameter of the diameter-expandable drill bit (3) is reduced;
s6: high-pressure grouting, namely taking the hollow drill rod (2) and the expandable drill bit (3) out when grout overflows from the pipe hole of the straight section hole (4), and then performing secondary high-pressure grouting on the straight section hole (4) and the expandable hole (41) for reinforcement;
s7: when the construction of the anti-floating anchor rod reaches the design standard, a connecting structure and an anti-seepage structure are constructed at the top end of the anti-floating anchor rod.
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| CN201911093661.2A CN110714463A (en) | 2019-11-11 | 2019-11-11 | Mechanical expanding anti-floating anchor rod and construction method thereof |
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| CN201911093661.2A CN110714463A (en) | 2019-11-11 | 2019-11-11 | Mechanical expanding anti-floating anchor rod and construction method thereof |
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| CN114086550A (en) * | 2021-11-02 | 2022-02-25 | 浙江科技学院 | Anti-floating anchor rod based on extension structure in soft soil |
| CN114150664A (en) * | 2021-11-15 | 2022-03-08 | 中国地质调查局武汉地质调查中心 | Rapid construction device and method for prestressed basalt fiber anchor rod |
| CN114215055A (en) * | 2022-01-07 | 2022-03-22 | 青岛理工大学 | Enlarged head anchor cable/rod construction device and method |
| CN112709485B (en) * | 2020-12-23 | 2022-04-05 | 包头市蒙鹿电力设备有限公司 | Telegraph pole structure for preventing uplift in high-latitude area |
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| CN114086550A (en) * | 2021-11-02 | 2022-02-25 | 浙江科技学院 | Anti-floating anchor rod based on extension structure in soft soil |
| CN114150664A (en) * | 2021-11-15 | 2022-03-08 | 中国地质调查局武汉地质调查中心 | Rapid construction device and method for prestressed basalt fiber anchor rod |
| CN114150664B (en) * | 2021-11-15 | 2023-04-07 | 中国地质调查局武汉地质调查中心 | Rapid construction device and method for prestressed basalt fiber anchor rod |
| CN114215055A (en) * | 2022-01-07 | 2022-03-22 | 青岛理工大学 | Enlarged head anchor cable/rod construction device and method |
| CN114215055B (en) * | 2022-01-07 | 2023-05-09 | 青岛理工大学 | Construction method of enlarged head anchor rope construction device |
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