CN108678032A - A kind of anti-float anchor rod and its construction method - Google Patents
A kind of anti-float anchor rod and its construction method Download PDFInfo
- Publication number
- CN108678032A CN108678032A CN201810311037.4A CN201810311037A CN108678032A CN 108678032 A CN108678032 A CN 108678032A CN 201810311037 A CN201810311037 A CN 201810311037A CN 108678032 A CN108678032 A CN 108678032A
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- Prior art keywords
- anchor
- diameter
- pressure rotary
- spray
- reaming
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Classifications
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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
-
- 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
- E02D5/80—Ground anchors
- E02D5/801—Ground anchors driven by screwing
Abstract
The invention discloses a kind of anti-float anchor rods comprising anchor pole and the anchor pile for wrapping anchor pole, the anchor pile are the concrete-pile that intensity is at least up to C25, and the anchor pile includes a main body and is connected to the enlarged footing of a bottom part body；The enlarged footing is coaxially disposed and is integrally formed with stake main body, and the diameter of the enlarged footing is more than the diameter of the stake main body.Since the anchor pile of the present invention is concrete-pile, anchor pile includes a main body and is connected to the enlarged footing of a bottom part body, and the diameter of the enlarged footing is more than the diameter of the stake main body；Therefore a kind of anti-floating ability of anti-float anchor rod of the present invention is strong.Invention additionally discloses this described a kind of two kinds of construction method of anti-float anchor rod, both construction methods have easy to operate, the big advantage of frictional force between molding anchor pile and anchor hole.
Description
Technical field
The present invention relates to engineering construction field, a kind of anti-float anchor rod and its construction method are particularly related to.
Background technology
Since the comprehensive load that building dead weight and other external factor generate is insufficient, especially deep basal pit is basic, in order to
When balancing buoyancy caused by underground water, it is necessary to apply vertical external force in sole plate with neutral buoyancy.Anti-float anchor rod refer to
The general name for the various pile-type that anti-building shifts up.Existing anti-float anchor rod generally comprises anchor pole and wraps the stake of anchor pole
Body, the pile body is generally pylindrical, using withdrawal resistance caused by the frictional force between pile body side wall and soil layer to foundation floating
Trend constrained, play the role of resist foundation floating.But the anti-floating ability of existing anti-float anchor rod is not generally strong.
Main cause is：In use, traditional anti-float anchor rod is to prevent jam of grouting pipe, is generally filled using cement mortar
The anchor pile of note, i.e., existing anti-float anchor rod is concrete stake, and the shrinkage of cement mortar is big, it is easy to cause to emit when secondary grouting
Slurry, and be also easy to, so that there are gap between molding anchor pile and anchor hole, lead to the frictional force between anchor pile and anchor hole
It is small, meanwhile, underground water is easy to squeeze into gap, further decreases the frictional force between anchor pile and ground basal wall；After cement slurry sets
Its surface of the anchor pile of formation is relatively smooth so that friction is small between anchor pile and ground basal wall, and anchoring effect is poor.
Invention content
The purpose of the present invention is to provide a kind of anti-float anchor rods that anti-floating ability is strong, and the present invention also provides the anti-float anchor rods
Construction method.
In order to achieve the above objectives, solution of the invention is：
A kind of anti-float anchor rod comprising anchor pole and the anchor pile for wrapping anchor pole, the anchor pile are that intensity is at least up to C25's
Concrete-pile, the anchor pile include a main body and are connected to the enlarged footing of a bottom part body；The enlarged footing and stake main body are same
Axis is arranged and is integrally formed, and the diameter of the enlarged footing is more than the diameter of the stake main body.
The height of the enlarged footing be 2 meters, a diameter of 400 millimeters of the enlarged footing, a diameter of the 250 of the stake main body
Millimeter.
The side wall of the stake main body is formed at least one strengthening portion outwardly protruded.
The outer diameter of the strengthening portion is identical as enlarged footing diameter；Close on the strengthening portion of the enlarged footing and the minimum of enlarged footing
Distance is 1.5 meters.
The quantity at least two of the strengthening portion, the minimum range between adjacent strengthening portion are 1.5 meters.
The anchor pole is screw-thread steel.
A kind of a kind of construction method of anti-float anchor rod includes the following steps：
Step（1）：Drill bit is installed on the drilling rod of high-pressure rotary-spray drilling machine, and is drilled using drill bit to form pore-forming；Wherein
When drill bit, which pierces depth, reaches projected depth, high-pressure rotary-spray drilling machine stops and exits drill bit and drilling rod from pore-forming；
Step（2）：It is high-pressure rotary-spray nozzle by the bit change-over on the drilling rod of high-pressure rotary-spray drilling machine and puts high-pressure rotary-spray nozzle
Enter the center of pore-forming bottom, then drilling rod gradually rises and high-pressure rotary-spray nozzle rotating-spray flow, by being sprayed to high-pressure rotary-spray
The injection pressure of head and/or the rate of climb of drilling rod are controlled to carry out ream operation to pore-forming to form anchor hole；To at
Hole carries out in ream operation, needs to extract the flow in pore-forming；The anchor hole is divided into the first reaming and from bottom to top
Two reamings, the height and diameter of first reaming are identical as the height of the enlarged footing and diameter difference；Second reaming it is straight
Diameter is identical as the diameter of stake main body；
Step（3）：The drilling rod of high-pressure rotary-spray drilling machine and high-pressure rotary-spray nozzle are exited from anchor hole, anchor pole is then put into anchor hole
In；
Step（4）：The high-pressure rotary-spray nozzle of high-pressure rotary-spray drilling machine is put into the bottom of anchor hole bottom；Then in being poured into anchor hole
Sand, while the drilling rod of high-pressure rotary-spray drilling machine is rotated around anchor pole and is gradually risen and high-pressure rotary-spray nozzle rotating-spray cement mortar,
So that cement mortar and middle husky mixing are to form cement mortar；
Step（5）：After drilling rod and high-pressure rotary-spray nozzle after being exited in anchor hole, rubble is added simultaneously into the cement mortar in anchor hole
It is vibrated with vibrator so that cement mortar and rubble are uniformly mixed to form concrete slurry；
Step（6）：Wait for concrete slurry solidification to form the anchor pile that intensity is at least up to C25, a kind of anti-float anchor rod
It completes.
In a kind of a kind of construction method of anti-float anchor rod, the height of first reaming is 2 meters, described first
A diameter of 400 millimeters of reaming, a diameter of 250 millimeters of second reaming.
In a kind of a kind of construction method of anti-float anchor rod, in the step（4）In, in high-pressure rotary-spray drilling machine
Drilling rod is during anchor pole is rotated and gradually risen, by controlling velocity of rotation, the drilling rod rising that drilling rod rotate around anchor pole
Speed and rotary nozzle injection pressure come to the second reaming carry out ream operation to form at least one in the second reaming
A third reaming.
In a kind of a kind of construction method of anti-float anchor rod, the diameter of the third reaming is equal to the first reaming
Diameter.
A kind of another construction method of anti-float anchor rod includes the following steps：
Step（1）：Drill bit is installed on the drilling rod of high-pressure rotary-spray drilling machine, and is drilled using drill bit to form pore-forming；Wherein
When drill bit, which pierces depth, reaches projected depth, high-pressure rotary-spray drilling machine stops and exits drill bit and drilling rod from pore-forming；
Step（2）：It is high-pressure rotary-spray nozzle by the bit change-over on the drilling rod of high-pressure rotary-spray drilling machine and puts high-pressure rotary-spray nozzle
Enter the center of pore-forming bottom, then drilling rod gradually rises and high-pressure rotary-spray nozzle rotating-spray flow, by being sprayed to high-pressure rotary-spray
The injection pressure of head and/or the rate of climb of drilling rod are controlled to carry out ream operation to pore-forming to form anchor hole；To at
Hole carries out in ream operation, needs to extract the flow in pore-forming；The anchor hole is divided into the first reaming and from bottom to top
Two reamings, the height and diameter of first reaming are identical as the height of the enlarged footing and diameter difference；Second reaming it is straight
Diameter is identical as the diameter of stake main body；
Step（3）：The drilling rod of high-pressure rotary-spray drilling machine and high-pressure rotary-spray nozzle are exited from anchor hole, anchor pole is then put into anchor hole
In and cement mortar filled into anchor hole by Grouting Pipe；
Step（4）：Husky and rubble and vibrated with vibrator in being added into the cement mortar in anchor hole so that cement mortar, in
Husky and rubble is uniformly mixed to form concrete slurry；
Step（5）：Wait for concrete slurry solidification to form the anchor pile that intensity is at least up to C25, a kind of anti-float anchor rod
It completes.
In a kind of another construction method of anti-float anchor rod, in the step（4）In, in the water in anchor hole
Cement is added during husky and rubble in being added in mud.
In a kind of another construction method of anti-float anchor rod, the height of first reaming is 2 meters, described the
A diameter of 400 millimeters of one reaming, a diameter of 250 millimeters of second reaming.
After adopting the above scheme, a kind of anchor pile of anti-float anchor rod of the present invention uses concrete-pile, concrete-pile
Compare concrete stake, shrinkage smaller when concrete-pile is molded, the surface roughness bigger of concrete-pile, therefore the present invention
Anchor pile side wall and anchor hole between frictional force it is big；And the present invention can also carry out the upper surface of enlarged footing using soil layer
Pressure is to improve the anti-floating ability of the present invention；Comprehensive these two aspects, a kind of anti-floating ability phase of anti-float anchor rod of the present invention
More existing anti-float anchor rod is strong.And the present invention also provides a kind of two kinds of construction methods of anti-float anchor rod, both
Construction method does not need secondary grouting, and operation is simpler.
Description of the drawings
Fig. 1 is a kind of sectional view of the anti-float anchor rod of the present invention in soil layer.
Specific implementation mode
In order to further explain the technical solution of the present invention, being explained in detail the present invention below by specific embodiment
It states.
As shown in Figure 1, present invention is disclosed a kind of anti-float anchor rod, which includes anchor pole 1 and wraps anchor pole
Anchor pile 2, the anchor pile 2 are the concrete-pile that intensity is at least up to C25, and the anchor pile 2 includes stake main body 21 and connection
Enlarged footing 22 in 21 bottom of stake main body；The enlarged footing 22 is integrally formed with stake main body 21, and the diameter of the enlarged footing 22 is big
In the diameter of the stake main body 21.Wherein the high-priority of the enlarged footing 22 is 2 meters, and the diameter of the enlarged footing 22 is preferably
400 millimeters, the diameter of the stake main body 21 is preferably 250 millimeters, and the anchor pole 1 can be coaxially disposed with anchor pile 2, the anchor
Bar 1 can be screw-thread steel.
A kind of anchor pile 2 of anti-float anchor rod of the present invention uses concrete-pile, concrete-pile to compare concrete stake, mixes
Shrinkage smaller when solidifying soil forming pile, the surface roughness bigger of concrete-pile, therefore the side wall of the anchor pile 2 of the present invention
Frictional force between anchor hole 3 is big；And the anti-float anchor rod of the present invention can also carry out the upper surface of enlarged footing 22 using soil layer
Pressure is to improve the anti-floating ability of the present invention, wherein soil layer can be set such that enlarged footing 22 diameter of enlarged footing 22
The pressure of upper surface be more than soil layer to the frictional force of 2 side of anchor pile, so that anti-floating ability of the invention is further
Reinforce；Comprehensive these two aspects, a kind of anti-floating ability of anti-float anchor rod of the present invention are strong compared to more existing anti-float anchor rod.Through
Test is crossed, when the anchor pole 1 is 6 meters of long screw-thread steels, a kind of resistance to plucking pulling force of anti-float anchor rod of the present invention can reach
40 tons；When the anchor pole 1 is 9 meters of long screw-thread steels, a kind of resistance to plucking pulling force of anti-float anchor rod of the present invention can reach 60
Ton；When the anchor pole 1 is 12 meters of long screw-thread steels, a kind of resistance to plucking pulling force of anti-float anchor rod of the present invention can reach 80
Ton.
Since some buildings need stronger anti-floating ability, further, the side wall of the stake main body 21 be formed with it is multiple to
The strengthening portion 211 of outer protrusion can further increase the anti-floating ability of the anti-float anchor rod of the present invention by strengthening portion 211；Wherein institute
The outer diameter for stating strengthening portion 211 is identical as 22 diameter of enlarged footing；Close on the strengthening portion 211 of the enlarged footing 22 with enlarged footing 22 most
Small distance is 1.5 meters；When the quantity at least two of the strengthening portion 211, the minimum range between adjacent strengthening portion 211
It is 1.5 meters.
The present invention also provides a kind of two kinds of construction methods of anti-float anchor rod.
A kind of the first construction method of anti-float anchor rod wherein of the present invention includes the following steps：
Step（1）：Drill bit is installed on the drilling rod of high-pressure rotary-spray drilling machine, and is drilled using drill bit to form pore-forming；Wherein
When drill bit, which pierces depth, reaches projected depth, high-pressure rotary-spray drilling machine stops and exits drill bit and drilling rod from pore-forming；
Step（2）：It is high-pressure rotary-spray nozzle by the bit change-over on the drilling rod of high-pressure rotary-spray drilling machine and puts high-pressure rotary-spray nozzle
Enter the center of pore-forming bottom, then drilling rod gradually rises and high-pressure rotary-spray nozzle rotating-spray flow, by being sprayed to high-pressure rotary-spray
The injection pressure of head and/or the rate of climb of drilling rod are controlled to carry out ream operation to pore-forming to form anchor hole 3；To at
Hole carries out in ream operation, needs to extract the flow in pore-forming；The anchor hole 3 is divided into 31 He of the first reaming from bottom to top
Second reaming 32, the height and diameter of first reaming 31 are identical as the height of the enlarged footing 22 and diameter difference；Second
The diameter of reaming 32 is identical as the diameter of stake main body 21；
Step（3）：The drilling rod of high-pressure rotary-spray drilling machine and high-pressure rotary-spray nozzle are exited from anchor hole 3, anchor pole 1 is then put into anchor
In hole 3；
Step（4）：The high-pressure rotary-spray nozzle of high-pressure rotary-spray drilling machine is put into the bottom of 3 bottom of anchor hole；Then it is poured into anchor hole 3
Middle sand, while the drilling rod of high-pressure rotary-spray drilling machine is rotated and is gradually risen and high-pressure rotary-spray nozzle rotating-spray cement around anchor pole 1
Slurry so that cement mortar is with middle husky mixing to form cement mortar；
Step（5）：After drilling rod and high-pressure rotary-spray nozzle after being exited in anchor hole 3, rubble is added into the cement mortar in anchor hole 3
It is used in combination vibrator to vibrate so that cement mortar and rubble are uniformly mixed to form concrete slurry；
Step（6）：Wait for concrete slurry solidification to form the anchor pile 2 that intensity is at least up to C25, a kind of anti-float anchor rod
It completes.
In the first construction method, the highly preferred of first reaming 31 is 2 meters, the diameter of first reaming 31
Preferably 400 millimeters, the diameter of second reaming 32 is preferably 250 millimeters.
Further, in the first construction method, in the step（4）In, high-pressure rotary-spray drilling machine drilling rod around anchor
Bar 1 rotates and during gradually rising, by control the velocity of rotation that drilling rod rotate around anchor pole 1, the speed of drilling rod rising with
And the injection pressure of rotary nozzle come to the second reaming 32 carry out ream operation to form at least one third in the second reaming
Reaming 33, by the third reaming 33 for the molding of strengthening portion 211；Wherein the diameter of the third reaming 33 can be equal to the
The diameter of one reaming 31.
It, can be so that anchor using the high-pressure injection of high-pressure rotary-spray drilling machine and the vibration of vibrating head in the first construction method
It is tightly combined between bar stake 2 and anchor hole 3, so that the frictional force bigger of molding anchor pile 2 and anchor hole 33；Therefore first
Kind construction method to be tightly combined between anchor pile 2 and anchor hole 3 without secondary grouting, the first construction method of the invention
Operated in operation it is simpler, and through measurement, the first construction method of the invention can relative to existing anti-float anchor rod
Save more 50% material cost.
A kind of second of construction method of anti-float anchor rod of the present invention includes the following steps：
Step（1）：Drill bit is installed on the drilling rod of high-pressure rotary-spray drilling machine, and is drilled using drill bit to form pore-forming；Wherein
When drill bit, which pierces depth, reaches projected depth, high-pressure rotary-spray drilling machine stops and exits drill bit and drilling rod from pore-forming；
Step（2）：It is high-pressure rotary-spray nozzle by the bit change-over on the drilling rod of high-pressure rotary-spray drilling machine and puts high-pressure rotary-spray nozzle
Enter the center of pore-forming bottom, then drilling rod gradually rises and high-pressure rotary-spray nozzle rotating-spray flow, by being sprayed to high-pressure rotary-spray
The injection pressure of head and/or the rate of climb of drilling rod are controlled to carry out ream operation to pore-forming to form anchor hole 3；To at
Hole carries out in ream operation, needs to extract the flow in pore-forming；The anchor hole 3 is divided into 31 He of the first reaming from bottom to top
Second reaming 32, the height and diameter of first reaming 31 are identical as the height of the enlarged footing 22 and diameter difference；Second
The diameter of reaming 32 is identical as the diameter of stake main body 21；
Step（3）：The drilling rod of high-pressure rotary-spray drilling machine and high-pressure rotary-spray nozzle are exited from anchor hole 3, anchor pole 1 is then put into anchor
Cement mortar is filled in hole 3 and by Grouting Pipe into anchor hole 3；
Step（4）：Husky and rubble and vibrated with vibrator in being added into the cement mortar in anchor hole 3 so that cement mortar, in
Husky and rubble is uniformly mixed to form concrete slurry；
Step（5）：Wait for concrete slurry solidification to form the anchor pile 2 that intensity is at least up to C25, a kind of anti-float anchor rod
It completes.
In second of construction method, the highly preferred of first reaming 31 is 2 meters, the diameter of first reaming 31
Preferably 400 millimeters, the diameter of second reaming 32 is preferably 250 millimeters.
In second of construction method, in the step（4）In, it is husky and broken in being added in the cement mortar in anchor hole 3
Cement is added during stone to improve the viscosity of concrete slurry.
In a kind of second of construction method of anti-float anchor rod, the height of first reaming 31 is 2 meters, described
A diameter of 400 millimeters of first reaming 31, a diameter of 250 millimeters of second reaming 32.
In second of construction method, using the vibration of vibrating head, it can also to combine between anchor pile 2 and anchor hole 3 tight
It is close, so that the frictional force bigger of molding anchor pile 2 and anchor hole 3；Therefore in second of construction method without secondary injection
It starches to be tightly combined between anchor pile 2 and anchor hole 3, is operated in second of construction method of the invention operation also simpler
It is single, and by measuring, second of construction method of the invention can also save more 50% material relative to existing anti-float anchor rod
Cost.
The product form and style of above-described embodiment and schema and the non-limiting present invention, any technical field it is common
The appropriate changes or modifications that technical staff does it all should be regarded as the patent category for not departing from the present invention.
Claims (13)
1. a kind of anti-float anchor rod, it is characterised in that：Including anchor pole and the anchor pile for wrapping anchor pole, the anchor pile be intensity extremely
Reach the concrete-pile of C25 less, the anchor pile includes a main body and is connected to the enlarged footing of a bottom part body；The enlarged footing
It is coaxially disposed and is integrally formed with stake main body, the diameter of the enlarged footing is more than the diameter of the stake main body.
2. a kind of anti-float anchor rod as described in claim 1, it is characterised in that：The height of the enlarged footing is 2 meters, the expansion
A diameter of 400 millimeters, a diameter of 250 millimeters of the stake main body of head.
3. a kind of anti-float anchor rod as described in claim 1, it is characterised in that：The side wall of the stake main body is formed at least one
The strengthening portion outwardly protruded.
4. a kind of anti-float anchor rod as claimed in claim 3, it is characterised in that：The outer diameter of the strengthening portion and enlarged footing diameter phase
Together；The minimum range of the strengthening portion and enlarged footing of closing on the enlarged footing is 1.5 meters.
5. a kind of anti-float anchor rod as claimed in claim 4, it is characterised in that：The quantity at least two of the strengthening portion, phase
Minimum range between adjacent strengthening portion is 1.5 meters.
6. a kind of anti-float anchor rod as described in claim 1, it is characterised in that：The anchor pole is screw-thread steel.
7. a kind of construction method of anti-float anchor rod as described in claim 1, it is characterised in that：Include the following steps：
Step（1）：Drill bit is installed on the drilling rod of high-pressure rotary-spray drilling machine, and is drilled using drill bit to form pore-forming；Wherein
When drill bit, which pierces depth, reaches projected depth, high-pressure rotary-spray drilling machine stops and exits drill bit and drilling rod from pore-forming；
Step（2）：It is high-pressure rotary-spray nozzle by the bit change-over on the drilling rod of high-pressure rotary-spray drilling machine and puts high-pressure rotary-spray nozzle
Enter the center of pore-forming bottom, then drilling rod gradually rises and high-pressure rotary-spray nozzle rotating-spray flow, by being sprayed to high-pressure rotary-spray
The injection pressure of head and/or the rate of climb of drilling rod are controlled to carry out ream operation to pore-forming to form anchor hole；To at
Hole carries out in ream operation, needs to extract the flow in pore-forming；The anchor hole is divided into the first reaming and from bottom to top
Two reamings, the height and diameter of first reaming are identical as the height of the enlarged footing and diameter difference；Second reaming it is straight
Diameter is identical as the diameter of stake main body；
Step（3）：The drilling rod of high-pressure rotary-spray drilling machine and high-pressure rotary-spray nozzle are exited from anchor hole, anchor pole is then put into anchor hole
In；
Step（4）：The high-pressure rotary-spray nozzle of high-pressure rotary-spray drilling machine is put into the bottom of anchor hole bottom；Then in being poured into anchor hole
Sand, while the drilling rod of high-pressure rotary-spray drilling machine is rotated around anchor pole and is gradually risen and high-pressure rotary-spray nozzle rotating-spray cement mortar,
So that cement mortar and middle husky mixing are to form cement mortar；
Step（5）：After drilling rod and high-pressure rotary-spray nozzle after being exited in anchor hole, rubble is added simultaneously into the cement mortar in anchor hole
It is vibrated with vibrator so that cement mortar and rubble are uniformly mixed to form concrete slurry；
Step（6）：Wait for concrete slurry solidification to form the anchor pile that intensity is at least up to C25, a kind of anti-float anchor rod
It completes.
8. construction method as claimed in claim 7, it is characterised in that：The height of first reaming is 2 meters, and described first expands
A diameter of 400 millimeters of hole, a diameter of 250 millimeters of second reaming.
9. construction method as claimed in claim 7 or 8, it is characterised in that：In the step（4）In, in high-pressure rotary-spray drilling machine
Drilling rod during anchor pole is rotated and is gradually risen, by controlling drilling rod on velocity of rotation that anchor pole rotates, drilling rod
Rise speed and rotary nozzle injection pressure come to the second reaming carry out ream operation to be formed at least in the second reaming
One third reaming.
10. construction method as claimed in claim 9, it is characterised in that：The diameter of the third reaming is equal to the first reaming
Diameter.
11. the construction method of anti-float anchor rod as described in claim 1, it is characterised in that：Include the following steps：
Step（1）：Drill bit is installed on the drilling rod of high-pressure rotary-spray drilling machine, and is drilled using drill bit to form pore-forming；Wherein
When drill bit, which pierces depth, reaches projected depth, high-pressure rotary-spray drilling machine stops and exits drill bit and drilling rod from pore-forming；
Step（2）：It is high-pressure rotary-spray nozzle by the bit change-over on the drilling rod of high-pressure rotary-spray drilling machine and puts high-pressure rotary-spray nozzle
Enter the center of pore-forming bottom, then drilling rod gradually rises and high-pressure rotary-spray nozzle rotating-spray flow, by being sprayed to high-pressure rotary-spray
The injection pressure of head and/or the rate of climb of drilling rod are controlled to carry out ream operation to pore-forming to form anchor hole；To at
Hole carries out in ream operation, needs to extract the flow in pore-forming；The anchor hole is divided into the first reaming and from bottom to top
Two reamings, the height and diameter of first reaming are identical as the height of the enlarged footing and diameter difference；Second reaming it is straight
Diameter is identical as the diameter of stake main body；
Step（3）：The drilling rod of high-pressure rotary-spray drilling machine and high-pressure rotary-spray nozzle are exited from anchor hole, anchor pole is then put into anchor
Cement mortar is filled into anchor hole in hole and by Grouting Pipe；
Step（4）：Husky and rubble and vibrated with vibrator in being added into the cement mortar in anchor hole so that cement mortar, in
Husky and rubble is uniformly mixed to form concrete slurry；
Step（5）：Wait for concrete slurry solidification to form the anchor pile that intensity is at least up to C25, a kind of anti-float anchor rod
It completes.
12. construction method as claimed in claim 11, it is characterised in that：In the step（4）In, in the cement in anchor hole
Cement is added during husky and rubble in being added in slurry.
13. construction method as claimed in claim 11, it is characterised in that：The height of first reaming be 2 meters, described first
A diameter of 400 millimeters of reaming, a diameter of 250 millimeters of second reaming.
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| CN201810311037.4A CN108678032A (en) | 2018-04-09 | 2018-04-09 | A kind of anti-float anchor rod and its construction method |
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| CN201810311037.4A CN108678032A (en) | 2018-04-09 | 2018-04-09 | A kind of anti-float anchor rod and its construction method |
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Cited By (4)
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| CN109183857A (en) * | 2018-09-18 | 2019-01-11 | 浙江坤德创新岩土工程有限公司 | A kind of anti-float anchor rod construction method |
| CN109339070A (en) * | 2018-11-05 | 2019-02-15 | 黄灿 | Anchoring pile and its construction method are planted in a kind of whirl spraying |
| CN109518727A (en) * | 2018-11-05 | 2019-03-26 | 黄灿 | A kind of processing method of basement bottom board crack and water leakage |
| CN110905570A (en) * | 2019-12-10 | 2020-03-24 | 济宁学院 | A stock anchor beam supporting construction for coal mine tunnel |
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| CN109183857A (en) * | 2018-09-18 | 2019-01-11 | 浙江坤德创新岩土工程有限公司 | A kind of anti-float anchor rod construction method |
| CN109183857B (en) * | 2018-09-18 | 2022-04-26 | 浙江坤德创新岩土工程有限公司 | Anti-floating anchor rod construction method |
| CN109339070A (en) * | 2018-11-05 | 2019-02-15 | 黄灿 | Anchoring pile and its construction method are planted in a kind of whirl spraying |
| CN109518727A (en) * | 2018-11-05 | 2019-03-26 | 黄灿 | A kind of processing method of basement bottom board crack and water leakage |
| CN110905570A (en) * | 2019-12-10 | 2020-03-24 | 济宁学院 | A stock anchor beam supporting construction for coal mine tunnel |
| CN110905570B (en) * | 2019-12-10 | 2021-03-23 | 济宁学院 | A stock anchor beam supporting construction for coal mine tunnel |
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