CN113669090A - Anchor rod construction process - Google Patents
Anchor rod construction process Download PDFInfo
- Publication number
- CN113669090A CN113669090A CN202110966605.6A CN202110966605A CN113669090A CN 113669090 A CN113669090 A CN 113669090A CN 202110966605 A CN202110966605 A CN 202110966605A CN 113669090 A CN113669090 A CN 113669090A
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- China
- Prior art keywords
- anchor rod
- drill
- hole
- drill bit
- sleeve
- Prior art date
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- 238000010276 construction Methods 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 79
- 238000005553 drilling Methods 0.000 claims abstract description 62
- 239000002002 slurry Substances 0.000 claims abstract description 28
- 239000007921 spray Substances 0.000 claims abstract description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 20
- 239000012535 impurity Substances 0.000 claims description 20
- 239000010959 steel Substances 0.000 claims description 20
- 229910017052 cobalt Inorganic materials 0.000 claims description 5
- 239000010941 cobalt Substances 0.000 claims description 5
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 5
- 229910003460 diamond Inorganic materials 0.000 claims description 5
- 239000010432 diamond Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000004576 sand Substances 0.000 abstract description 12
- 239000002689 soil Substances 0.000 description 6
- 238000011010 flushing procedure Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
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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
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
- E21B10/43—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
- E21B10/602—Drill bits characterised by conduits or nozzles for drilling fluids the bit being a rotary drag type bit with blades
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/30—Miscellaneous comprising anchoring details
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Earth Drilling (AREA)
Abstract
The invention provides an anchor rod construction process, which comprises the following steps: the anchor rod construction process comprises the steps of positioning, first layer construction, second layer construction, anchor rod placing, hole expanding and grouting, construction completion and the like, wherein the anchor rod construction process comprises the steps of double-sleeve construction, meanwhile, the construction of the first gravel layer is carried out by adopting the improved first drill bit, the phenomenon of drill sticking is avoided, when the second layer of construction is carried out, the inner sleeve is removed after the outer layer of the first layer of construction, the outer sleeve is reserved to avoid hole collapse and sand gushing, the second layer of water-rich layer is constructed by adopting the improved second drill bit, the guide post guides the second drill bit to advance in the construction process, and simultaneously the slurry outlet hole sprays slurry from different directions through the accommodating cavity, so that the pressure balance in the drilling hole is kept, the hole collapse is avoided, meanwhile, sundries in the drilled hole are flushed out from the interior of the outer sleeve, and the problems that a drill bit cannot drill due to pebble and gravel existing in the conventional anchor rod construction, and sand gushing and hole collapse are caused due to large water head pressure under the condition of water enrichment are solved.
Description
Technical Field
The invention relates to the technical field of anchor rod construction, in particular to an anchor rod construction process.
Background
At present, the geotechnical anchoring technology is widely applied to engineering construction of side slopes, tunnels, underground engineering, mines and the like, and is an effective method for improving the stability of geotechnical engineering and solving the stability problem of complex geotechnical engineering.
Disclosure of Invention
The embodiment of the invention provides an anchor rod construction process, wherein double-sleeve construction is adopted, meanwhile, the improved first drill bit is adopted to carry out construction of a first pebble gravel layer, the improved first drill bit can effectively crush pebble gravel, simultaneously, water sprayed out of a first water outlet hole, a second water outlet hole and a third water outlet hole washes out crushed pebble gravel from an outer sleeve, the phenomenon of drill jamming is avoided, when second-layer construction is carried out, the inner sleeve is removed after the outer layer of the first-layer construction, the outer sleeve is reserved, hole collapse and sand gushing are avoided, the improved second drill bit is adopted to carry out construction of a second water-rich layer, a guide column guides the second drill bit to advance in the construction process, simultaneously, slurry is sprayed out from different directions through a containing cavity, the pressure balance inside the drill hole is kept, the hole collapse is avoided, meanwhile, sundries inside the drill hole are washed out from the inside of the outer sleeve, and the problem that the drill bit cannot drill bit caused by pebble gravel existing in the existing anchor rod construction is solved, under the condition of water richness, the water head pressure is large, so that the problems of sand gushing and hole collapse are caused.
In view of the above problems, the technical solution proposed by the present invention is:
an anchor rod construction process comprises the following steps:
s1, positioning, measuring the position of the drilled hole according to the construction drawing and marking;
s2, carrying out first-layer construction, namely transporting a double-sleeve jumbolter to a drilling position, mounting first drill bits on a drill rod of the double-sleeve jumbolter, wherein each first drill bit comprises a first connecting body, a first connecting seat and a first insert tooth, the first connecting body is connected with the end face of the drill rod of the jumbolter, a first water outlet hole, a second water outlet hole and a third water outlet hole are sequentially formed in the end face, close to the drill rod, of the first connecting body, the first water outlet hole, the second water outlet hole and the third water outlet hole are communicated with a cavity in the drill rod, the first connecting seats are mounted on the surface of the other end of the first connecting body, the number of the first connecting seats is three, the first connecting seats are distributed on the surface of the other end of the first connecting body by taking the axis of the first connecting body as an array center, and a first accommodating cavity is formed between every two adjacent first connecting seats, the first water outlet hole, the second water outlet hole and the third water outlet hole are communicated with the first accommodating cavity, the first insert is mounted on the surface of the first connecting seat, the angle of a drill rod of the double-sleeve jumbolter is adjusted, the first drill bit is aligned to the positioning mark of the drill hole in the step S, the inner cavity of the drill rod of the jumbolter is connected with the water pump, the jumbolter and the water pump are started, the drill rod of the jumbolter drives the first drill bit to rotate, during the rotary drilling process of the first drill bit, generated scraps and sundries enter the first accommodating cavity, the first water outlet hole, the second water outlet hole and the third water outlet hole on the first drill bit spray clean water to flush sundries generated by drilling out of the hole through an inner sleeve of the double-sleeve jumbolter, and after the drill hole reaches a preset depth, the first drill bit is taken out, and construction of a first layer of hole sites is completed;
s3, constructing a second layer, taking down a first drill bit, installing a second drill bit on a drill rod of the double-sleeve jumbolter, wherein the second drill bit comprises a second connecting body, a second connecting seat, a second insert and a guide post, one end, close to the drill rod, of the second connecting body is provided with a slurry outlet hole, the slurry outlet hole is communicated with a cavity in the drill rod, the second connecting seats are installed on the end face of the other end of the second connecting body, the number of the second connecting seats is three, the second connecting seats are distributed on the surface of the other end of the second connecting body by taking the axis of the second connecting body as an array center, a second accommodating cavity is formed between every two adjacent second connecting seats, the slurry outlet hole is communicated with the first accommodating cavity, the second insert is installed on one side of the second connecting seats, the guide post is installed on the top of the second connecting seats, and a cutting edge is arranged on the top of the guide post, adjusting the angle of a drill rod of the double-sleeve anchor rod drilling machine, aligning the second drill bit to the drilled hole in the step S, connecting an inner cavity of the drill rod of the anchor rod drilling machine with a slurry pump, starting the anchor rod drilling machine and the slurry pump, driving the second drill bit to rotate by the drill rod of the anchor rod drilling machine, enabling generated scraps and impurities to enter a second accommodating cavity in the rotary drilling process of the second drill bit, punching the scraps and the impurities out of the hole through an inner sleeve, taking out the second drill bit and the inner sleeve after the scraps and the impurities are drilled to a preset depth, and reserving the outer sleeve in the drilled hole to complete the construction of second-layer drilled hole;
s4, placing the anchor rod steel strand and the flange disc into the hole, and pulling out the outer sleeve to the length outside the anchor rod enlarged head;
s5, reaming and grouting, moving to the position of the outer sleeve by using a high-pressure rotary jet drilling machine, aligning the high-pressure rotary jet head, penetrating the rotary jet head into the outer sleeve to the designed length, starting rotary jet of the high-pressure expansion head, and finishing grouting;
and S6, completing construction, removing the high-pressure jet grouting drilling machine, moving the double-sleeve bolting machine to the position of the anchor rod, pulling out the outer sleeve by using the double-sleeve bolting machine, and sealing the orifice of the anchor rod to complete construction.
As a preferred embodiment of the present invention, the mark in step S1 includes height, angle, aperture and depth information of the drilled hole.
As a preferable technical solution of the present invention, the first inserts are made of a diamond compact, the number of the first inserts is twenty-four, and eight first inserts are used as one group and are respectively distributed on the surface of the first connecting seat.
As a preferable technical solution of the present invention, the second inserts and the guide posts are made of cobalt carbide, the number of the second inserts is nine, and three second inserts are taken as a group and are respectively distributed on one side of the second connecting seat.
As a preferable aspect of the present invention, an axial center of the guide post and an axial center of the second connecting body are located on the same straight line.
As a preferred technical solution of the present invention, in S4, after the anchor steel strand is processed, the anchor steel strand and the flange are synchronously fed into the drill hole until one meter remains at the outer end of the hole, and when it is found that the anchor steel strand is difficult to be inserted into the outer sleeve, the outer sleeve is pulled out, impurities in the drill hole are removed, the outer sleeve is inserted into the drill hole again, and simultaneously, the impurities in the drill hole are flushed out by injecting clean water.
In S4, the anchor steel strand and the flange need to be degreased and derusted before use to avoid affecting adhesion with the anchor.
Compared with the prior art, the invention has the beneficial effects that: the anchor rod construction process comprises the steps of constructing by using double sleeves, constructing a first pebble gravel layer by using an improved first drill bit, effectively crushing pebble gravel by using the improved first drill bit, flushing the crushed pebble gravel out of an outer sleeve by using water sprayed from a first water outlet, a second water outlet and a third water outlet, avoiding the phenomenon of drill jamming, removing the inner sleeve after the first construction outer layer, reserving the outer sleeve, avoiding hole collapse and sand gushing, constructing a second water-rich layer by using an improved second drill bit, guiding the second drill bit to advance by using a guide column in the construction process, simultaneously spraying slurry from different directions through a slurry outlet cavity, keeping the pressure balance in the drill hole, avoiding hole collapse, flushing out impurities in the drill hole from the inner sleeve, and solving the problem that the drill bit cannot be drilled due to the pebble gravel existing in the conventional anchor rod construction, under the condition of water richness, the water head pressure is large, so that the problems of sand gushing and hole collapse are caused.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
Fig. 1 is a schematic flow chart of a construction process of an anchor rod disclosed by the embodiment of the invention;
FIG. 2 is a schematic diagram of a first drill bit according to an embodiment of the disclosure;
FIG. 3 is a schematic structural diagram of a second drill bit according to an embodiment of the disclosure.
Reference numerals: 1. a first drill bit; 11. a first connecting body; 111. a first water outlet; 112. a second water outlet; 113. a third water outlet; 12. a first connecting seat; 121. a first accommodating cavity; 13. a first inlay; 2. a second drill bit; 21. a second connector; 211. a slurry outlet; 22. a second connecting seat; 221. a second accommodating cavity; 23. a second inlay; 24. a guide post; 241. a cutting edge.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
As shown in fig. 1 to 3, a construction process of an anchor rod includes the following steps:
s1, positioning, measuring the position of the drilled hole according to the construction drawing and marking, wherein the marking comprises the height, the angle, the aperture and the depth information of the drilled hole;
s2, performing first-layer construction, namely transporting a double-sleeve jumbolter to a drilling position, installing a first drill bit 1 on a drill rod of the double-sleeve jumbolter, communicating the first drill bit 1 with an inner cavity of the drill rod of the jumbolter, adjusting the angle of the drill rod of the double-sleeve jumbolter, aligning the first drill bit 1 with the positioning mark of the drilling in the step S1, starting the jumbolter and a water pump, driving the first drill bit 1 to rotate by the drill rod of the jumbolter, flushing sundries generated by drilling out of a hole through an inner sleeve of the double-sleeve jumbolter by spraying clean water by the first drill bit 1 in the process of rotating and drilling the first drill bit 1, and taking out the first drill bit 1 after the drill bit 1 drills to a preset depth to complete the construction of a hole position of a first layer;
specifically, in the prior art, double-pipe jumbolter includes interior sleeve pipe, the outer tube, the drilling rod, slush pump and water pump, interior sleeve pipe is located the inside of outer tube, the drilling rod is located interior sheathed tube inside, the inside and outside sleeve pipe of double-pipe roof-bolter synchronous drive and drilling rod motion, at 1 moving in-process of first drill bit, interior sleeve pipe is used for protecting drilling rod and first drill bit 1, be used for discharging the cobble angle gravel piece and the debris that produce simultaneously among the drilling process, the outer tube is used for keeping the structure of drilling to avoid the drilling to gush sand and collapse, after first drill bit 1 bored into predetermined degree of depth according to the design, take out first drill bit 1, accomplish the construction of first layer hole site.
S3, performing second-layer construction, namely taking down the first drill bit 1, installing a second drill bit 2 on a drill rod of the double-sleeve anchor rod drilling machine, communicating the second drill bit 2 with an inner cavity of the drill rod of the anchor rod drilling machine, adjusting the angle of the drill rod of the double-sleeve anchor rod drilling machine, aligning the second drill bit 2 to the drilled hole in the step S2, starting the anchor rod drilling machine and a slurry pump, driving the second drill bit 2 to rotate by the drill rod of the anchor rod drilling machine, in the process of rotationally drilling the second drill bit 2, spraying slurry by the second drill bit 2 to flush sundries generated in the drilled hole out of the hole through the inner sleeve, taking out the second drill bit 2 and the inner sleeve after the drilled hole is drilled to a preset depth, and leaving the outer sleeve in the drilled hole to finish the second-layer drilling construction;
specifically, in the operation process of the second drill bit 2, the inner sleeve is used for protecting the drill rod and the second drill bit 2 and is used for discharging pebble, gravel and debris generated in the drilling process, the outer sleeve is used for keeping the structure of the drilled hole to avoid sand gushing and collapse of the drilled hole, the second drill bit 2 and the inner sleeve are taken out after the second drill bit 2 is drilled into the preset depth according to the design, the outer sleeve is left in the drilled hole, and the construction of second-layer drilling is completed.
S4, placing the anchor rod steel strand and the flange disc into the hole, and pulling out the outer sleeve to the length outside the anchor rod enlarged head;
concretely, after the processing of anchor rod steel strand wires is accomplished, anchor rod steel strand wires and ring flange need remove oil and rust cleaning before using and handle, be used for avoiding influencing the bonding with the anchor, send into the drilling with anchor rod steel strand wires and ring flange in step, until the drill way outer end remains one meter, when discovering that anchor rod steel strand wires ann inserts the intraductal difficulty of overcoat, extract the outer tube, clear away the impurity in the drilling, and insert the drilling with the outer tube inside again, the use is poured into the clear water and is washed out the inside impurity of drilling simultaneously.
S5, reaming and grouting, moving to the position of the outer sleeve by using a high-pressure rotary jet drilling machine, aligning the high-pressure rotary jet head, penetrating the rotary jet head into the outer sleeve to the designed length, starting rotary jet of the high-pressure expansion head, and finishing grouting;
and S6, completing construction, removing the high-pressure jet grouting drilling machine, moving the double-sleeve bolting machine to the position of the anchor rod, pulling out the outer sleeve by using the double-sleeve bolting machine, and sealing the orifice of the anchor rod to complete construction.
As shown in fig. 2, the first drill bit 1 includes a first connection body 11, a first connection seat 12 and first inserts 13, the first connection body 11 is connected to an end surface of a drill rod of an anchor rod machine, the end surface of the first connection body 11 near the drill rod is sequentially provided with a first water outlet 111, a second water outlet 112 and a third water outlet 113, the first water outlet 111, the second water outlet 112 and the third water outlet 113 are communicated with a cavity inside the drill rod, the first connection seat 12 is installed on a surface of the other end of the first connection body 11, the number of the first connection seats 12 is three, the first connection seats 12 are distributed on the surface of the other end of the first connection body 11 by taking an axial center of the first connection body 11 as an array center, the first inserts 13 are made of a diamond compact, the number of the first inserts 13 is twenty-four, the eight first inserts 13 are taken as a group and are respectively distributed on the surface of the first connection seat 12, a first accommodation cavity 121 is formed between two adjacent first connection seats 12, the first water outlet hole 111, the second water outlet hole 112 and the third water outlet hole 113 are communicated with the first accommodating cavity 121, the first insert 13 is installed on the surface of the first connecting seat 12, in the process of constructing the first layer, the first insert 13 made of a diamond composite sheet material arranged on the first drill bit 1 contacts with pebble cobbles to crush the pebble cobbles in the rotating process, the crushed pebble cobbles enter the first accommodating cavity 121, an inner cavity of a drill rod of the anchor rod machine is connected with a water pump, water enters the accommodating cavities from the first water outlet hole 111, the second water outlet hole 112 and the third water outlet hole 113, pebble cobbles powder and other impurities in the accommodating cavities are flushed into the inner sleeve and discharged to the outside through the outer sleeve, and the situation that the pebble cobbles block the drill bit to cause that the first layer construction cannot be completed is avoided.
As shown in fig. 3, the second drill 2 includes a second connector 21, second connector seats 22, second insert teeth 23 and guide posts 24, one end of the second connector 21 close to the drill rod is provided with a slurry outlet hole 211, the slurry outlet hole 211 is communicated with a cavity inside the drill rod, the second connector seats 22 are installed on an end surface of the other end of the second connector 21, the number of the second connector seats 22 is three, the axial center of the second connector 21 is used as an array center and is distributed on the surface of the other end of the second connector 21, a second accommodating cavity 221 is formed between two adjacent second connector seats 22, the slurry outlet hole 211 is communicated with the first accommodating cavity 121, the second insert teeth 23 are installed on one side of the second connector seats 22, the second insert teeth 23 and the guide posts 24 are made of cobalt carbide, the axial center of the guide posts 24 and the axial center of the second connector 21 are located on the same straight line, the number of the second insert teeth 23 is nine, the three second insert teeth 23 are used as a group, the guide posts 24 are respectively distributed on one side of the second connecting seat 22, the guide posts 24 are installed on the top of the second connecting seat 22, cutting edges 241 are arranged on the top of the guide posts 24, in the process of second-layer construction, a small hole is formed in the front of the cutting edge 241 arranged on the top of the guide post 24 to guide the advancing direction of the second drill bit 2, second inlaid teeth 23 made of cobalt carbide materials arranged on the second drill bit 2 are crushed with the front soil layer and broken stones in the rotating process, the crushed soil blocks, broken stones and other impurities enter the second accommodating cavity 221, the inner cavity of a drill rod of the anchor rod machine is connected with a slurry pump, slurry enters the accommodating cavity from a slurry outlet hole 211, the crushed soil blocks, broken stones and other impurities in the accommodating cavity are flushed into the inner sleeve and discharged to the outside through the outer sleeve, meanwhile, the sprayed slurry generates clean water pressure in the drilling hole to form liquid support, and hole drilling and sand gushing are avoided, the problems of hole collapse and sand gushing in the anchor rod construction process are avoided.
The anchor rod construction process includes the steps of installing the first drill bit 1 on a drill rod of a double-casing anchor rod drilling machine during first-layer construction by adopting the improved first drill bit 1 and the improved second drill bit 2, enabling first inlay teeth 13 made of diamond composite sheets arranged on the first drill bit 1 to be in contact with pebble cobbles in the rotation process to crush the pebble cobbles, enabling the crushed pebble cobbles to enter a first accommodating cavity 121, enabling water to enter the accommodating cavity from a first water outlet hole 111, a second water outlet hole 112 and a third water outlet hole 113, enabling pebble cobbles powder and other impurities in the accommodating cavity to be flushed into an inner sleeve and discharged to the outside through the outer sleeve pipe, avoiding the pebble cobbles from blocking the drill bits, taking out the first drill bit 1 after the drill bit is drilled to a preset depth, completing construction of the first-layer construction, taking down the first drill bit 1, and installing the second drill bit 2 on the drill rod of the double-casing anchor rod drilling machine, starting an anchor rod machine and a slurry pump, wherein a drill rod of the anchor rod machine drives a second drill bit 2 to rotate, second inlaid teeth 23 made of cobalt carbide and arranged on the second drill bit 2 are crushed with a front soil layer and broken stones in the rotating process, the crushed soil blocks, broken stones and other impurities enter a second accommodating cavity 221, an inner cavity of the drill rod of the anchor rod machine is connected with the slurry pump, slurry enters the accommodating cavity from a slurry outlet hole 211, the crushed soil blocks, broken stones and other impurities in the accommodating cavity are flushed into an inner sleeve and discharged to the outside through an outer sleeve, meanwhile, the sprayed slurry generates clean water pressure in a drill hole to form liquid support, hole collapse and sand gushing are avoided, after the second drill bit 2 is drilled to a preset depth according to design, the second drill bit 2 and the inner sleeve are taken out, the outer sleeve is left in the drill hole to complete the construction of second layer drilling, and after the anchor rod steel strand is processed, before the anchor rod steel strand and the flange plate are used, oil and rust removal treatment is needed, the anchor rod steel strand and the flange plate are synchronously fed into a drill hole until one meter is left at the outer end of the hole, when the anchor rod steel strand is difficult to insert into the outer sleeve, the outer sleeve is pulled out, impurities in the drill hole are removed, the outer sleeve is inserted into the drill hole again, simultaneously, clear water is injected to flush the impurities in the drill hole, a high-pressure rotary jet drilling machine is used for moving to the position of the outer sleeve, a high-pressure rotary jet is used for carrying out hole alignment, the rotary jet is inserted into the outer sleeve to the designed length, high-pressure expansion head rotary jet is started, grouting is completed, the high-pressure rotary jet drilling machine is moved away, the double-sleeve bolting machine is moved to the anchor rod, the outer sleeve is pulled out by the double-sleeve bolting machine, the hole of the anchor rod is sealed, and the problem that a drill bit cannot drill due to pebble pebbles existing in anchor rod construction at present is solved, under the condition of water richness, the water head pressure is large, so that the problems of sand gushing and hole collapse are caused.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (7)
1. The anchor rod construction process is characterized by comprising the following steps of:
s1, positioning, measuring the position of the drilled hole according to the construction drawing and marking;
s2, constructing a first layer, transporting a double-sleeve jumbolter to a drilling position, installing a first drill bit (1) on a drill rod of the double-sleeve jumbolter, wherein the first drill bit (1) comprises a first connecting body (11), a first connecting seat (12) and a first insert tooth (13), the first connecting body (11) is connected with the end surface of the drill rod of the jumbolter, a first water outlet hole (111), a second water outlet hole (112) and a third water outlet hole (113) are sequentially formed in the end surface, close to the drill rod, of the first connecting body (11), the first water outlet hole (111), the second water outlet hole (112) and the third water outlet hole (113) are communicated with a cavity inside the drill rod, the first connecting seat (12) is installed on the surface of the other end of the first connecting body (11), the number of the first connecting seats (12) is three, and the axis of the first connecting body (11) is used as an array center, the water-saving type double-sleeve anchor rod drilling machine is characterized in that the water-saving type double-sleeve anchor rod drilling machine is distributed on the surface of the other end of the first connecting body (11), a first containing cavity (121) is formed between every two adjacent first connecting seats (12), the first water outlet hole (111), the second water outlet hole (112) and the third water outlet hole (113) are communicated with the first containing cavity (121), the first inlaid tooth (13) is installed on the surface of the first connecting seat (12), the angle of a drill rod of the double-sleeve anchor rod drilling machine is adjusted, the first drill bit (1) is aligned to the positioning mark drilled in the step S1, the inner cavity of the drill rod of the anchor rod drilling machine is connected with a water pump, the anchor rod drilling machine and the water pump are started, the drill rod of the anchor rod drilling machine drives the first drill bit (1) to rotate, produced chips and sundries enter the first containing cavity (121) in the rotary drilling process of the first drill bit (1), and the first water outlet hole (111) on the first drill bit (1), The second water outlet hole (112) and the third water outlet hole (113) spray clean water to flush sundries generated by drilling out of the holes through an inner sleeve of the double-sleeve anchor rod drilling machine, and after the sundries are drilled to a preset depth, the first drill bit (1) is taken out to complete the construction of a first layer of hole sites;
s3, constructing a second layer, taking down a first drill bit (1), installing a second drill bit (2) on a drill rod of a double-sleeve anchor rod drilling machine, wherein the second drill bit (2) comprises a second connecting body (21), a second connecting seat (22), a second insert tooth (23) and a guide post (24), one end, close to the drill rod, of the second connecting body (21) is provided with a slurry outlet hole (211), the slurry outlet hole (211) is communicated with a cavity inside the drill rod, the second connecting seat (22) is installed on the end face of the other end of the second connecting body (21), the number of the second connecting seats (22) is three, the second connecting bodies (21) are distributed on the surface of the other end of the second connecting body (21) by taking the axis of the second connecting body (21) as an array center, a second accommodating cavity (221) is formed between every two adjacent second connecting seats (22), and the slurry outlet hole (211) is communicated with the first accommodating cavity (121), the second insert (23) is mounted on one side of the second connecting seat (22), the guide post (24) is mounted on the top of the second connecting seat (22), a cutting edge (241) is arranged on the top of the guide post (24), the angle of a drill rod of the double-sleeve anchor rod drilling machine is adjusted, the second drill bit (2) is aligned to the drilled hole in the step S2, a mud pump is connected to the inner cavity of the drill rod of the anchor rod drilling machine, the anchor rod drilling machine and the mud pump are started, the drill rod of the anchor rod drilling machine drives the second drill bit (2) to rotate, during the rotary drilling process of the second drill bit (2), generated scraps and impurities enter a second accommodating cavity (221), the scraps and impurities are punched out of the hole through the inner sleeve, after the scraps are drilled to a preset depth, the second drill bit (2) and the inner sleeve are taken out, and the outer sleeve is left in the drilled hole, so that the construction of the second layer of drilled hole is completed;
s4, placing the anchor rod steel strand and the flange disc into the hole, and pulling out the outer sleeve to the length outside the anchor rod enlarged head;
s5, reaming and grouting, moving to the position of the outer sleeve by using a high-pressure rotary jet drilling machine, aligning the high-pressure rotary jet head, penetrating the rotary jet head into the outer sleeve to the designed length, starting rotary jet of the high-pressure expansion head, and finishing grouting;
and S6, completing construction, removing the high-pressure jet grouting drilling machine, moving the double-sleeve bolting machine to the position of the anchor rod, pulling out the outer sleeve by using the double-sleeve bolting machine, and sealing the orifice of the anchor rod to complete construction.
2. The anchor rod construction process according to claim 1, wherein: the marks in step S1 include height, angle, aperture and depth information of the borehole.
3. The anchor rod construction process according to claim 1, wherein: the material of first inlay tooth (13) is the diamond compact, the quantity of first inlay tooth (13) is twenty four, with eight first inlay tooth (13) is a set of, distributes respectively in the surface of first connecting seat (12).
4. The anchor rod construction process according to claim 1, wherein: the second insert (23) and the guide column (24) are made of cobalt carbide, the number of the second insert (23) is nine, and the three second insert (23) are a group and are respectively distributed on one side of the second connecting seat (22).
5. The anchor rod construction process according to claim 1, wherein: the axis of the guide column (24) and the axis of the second connecting body (21) are positioned on the same straight line.
6. The anchor rod construction process according to claim 1, wherein: and S4, after the anchor rod steel strand is processed, the anchor rod steel strand and the flange plate are synchronously conveyed into the drill hole until one meter of anchor rod steel strand remains at the outer end of the drill hole, when the anchor rod steel strand is difficult to insert into the outer sleeve, the outer sleeve is pulled out, impurities in the drill hole are removed, the outer sleeve is inserted into the drill hole again, and meanwhile, the impurities in the drill hole are washed out by injecting clean water.
7. The anchor rod construction process according to claim 1, wherein: in S4, the anchor steel strand and the flange plate need to be degreased and derusted before use, so as to avoid the influence on the adhesion with the anchor body.
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Cited By (1)
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