CN113202091A - Self-drilling anti-floating anchor rod device and construction method - Google Patents
Self-drilling anti-floating anchor rod device and construction method Download PDFInfo
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- CN113202091A CN113202091A CN202110552407.5A CN202110552407A CN113202091A CN 113202091 A CN113202091 A CN 113202091A CN 202110552407 A CN202110552407 A CN 202110552407A CN 113202091 A CN113202091 A CN 113202091A
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- 238000005553 drilling Methods 0.000 title claims abstract description 71
- 238000007667 floating Methods 0.000 title claims abstract description 32
- 238000010276 construction Methods 0.000 title claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 89
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000004873 anchoring Methods 0.000 claims abstract description 5
- 239000002689 soil Substances 0.000 claims description 35
- 238000005520 cutting process Methods 0.000 claims description 27
- 239000011435 rock Substances 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 17
- 230000009467 reduction Effects 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 5
- 239000004568 cement Substances 0.000 claims description 4
- 239000011440 grout Substances 0.000 claims description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 4
- 239000011707 mineral Substances 0.000 claims description 4
- 238000011897 real-time detection Methods 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 239000011664 nicotinic acid Substances 0.000 claims description 2
- 230000003014 reinforcing effect Effects 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 5
- 238000004140 cleaning Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000037396 body weight Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 238000006467 substitution reaction Methods 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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- Mining & Mineral Resources (AREA)
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- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a self-drilling anti-floating anchor rod device and a construction method, wherein the device comprises an anchor rod, a self-drilling anti-floating anchor rod and a self-drilling anti-floating anchor rod, wherein the anchor rod is provided with a hollow inner cavity; the mandrel is coaxially arranged in the hollow inner cavity of the anchor rod, and a first high-pressure water channel, a second high-pressure water channel and a grouting channel are arranged in the mandrel; and the self-drilling high-pressure water disc is coaxially connected to the end part of the mandrel, extends out of the anchor rod and can rotate around the axial direction of the anchor rod. The invention combines the high-pressure water jet excavating equipment with the hollow anchor rod with the hole, drills at one time, completes the working procedures of drilling, cleaning the hole, installing the anchor rod, grouting, anchoring and the like in one construction process, and has the advantages of simple process, high construction efficiency, good economic benefit and the like.
Description
Technical Field
The invention relates to a self-drilling anti-floating anchor rod device and a construction method.
Background
With the development of urban construction in China, the full development and utilization of underground space become a necessary trend, and the foundation anti-floating is one of the difficulties in the design and construction process of buildings. The anti-floating anchor rod is a common anti-floating measure at present, has the advantages of good stratum adaptability, flexible arrangement, easy construction, easy control of anti-floating force and prestress, reduction of structural cost and the like, and is more economical and practical compared with other anti-floating methods. At present, the development requirements of all countries in the world on anchor rod technology are higher and higher, and the application of the anti-floating anchor rod in foundation pit supporting and engineering anti-floating engineering becomes a necessary trend and plays an important role.
The anti-floating anchor rod utilizes the side friction resistance and the dead weight between the rock and soil mass around the anchor rod and the anchor rod to resist the upper buoyancy, thereby keeping the stability of the upper structure, and the technical difficulty lies in the following points: firstly, the length of the anchor rod is too long, the frictional resistance is insufficient, and the anti-buoyancy force cannot be increased after the anchor rod reaches a certain length; secondly, the anchor rod disturbs the soil body in the drilling and hole cleaning processes; thirdly, drilling holes in the anchor rods in the loose and broken rock-soil mass and the sand-gravel layer to cause the problems of reduced aperture, hole collapse and difficult hole forming; fourthly, in the anchor bolt supporting construction, the expanded part can not be opened due to hard rock mass after the expanded anchor bolt is drilled; and fifthly, how to monitor and detect the axial force of the anchor rod and ensure that the anchor rod does not exceed the limit bearing capacity.
Disclosure of Invention
The invention aims to provide a self-drilling anti-floating anchor rod and a construction method thereof, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a self-drilling anti-floating anchor device, comprising:
an anchor having a hollow interior;
the mandrel is coaxially arranged in the hollow inner cavity of the anchor rod, and a first high-pressure water channel, a second high-pressure water channel and a grouting channel are arranged in the mandrel;
the self-drilling high-pressure water disc is coaxially connected to the end part of the mandrel, extends out of the anchor rod and can rotate around the axis direction of the anchor rod, and a first high-pressure water jet cutting hole connected with the first high-pressure water channel and a grouting hole connected with the grouting channel are formed in the self-drilling high-pressure water disc; the first high-pressure water jet hole is used for cutting and drilling rock and soil;
second high-pressure water jet holes which are communicated with each other are arranged on the rod side wall of the anchor rod and the shaft side wall of the mandrel, the second high-pressure water jet holes are connected with the second high-pressure water channel, and the second high-pressure water jet holes are used for cutting rock and soil on two sides of the anchor rod so as to form bearing grooves in the rock and soil on two sides of the anchor rod;
a self-supporting stop disposed on the outer wall of the bolt, the self-supporting stop being disposed adjacent to the second high pressure water jet hole and being inoperative during drilling and capable of partially extending into the bearing groove during anchoring of the bolt device, thereby improving anti-buoyancy of the stop body.
The second high-pressure water jet holes comprise a plurality of bearing grooves which are formed by cutting the high-pressure water jet holes, and the plurality of bearing grooves are distributed around the anchor rod in a bionic tree root shape;
the wall of the anchor rod is provided with one self-supporting stopping portion corresponding to each bearing groove.
Be equipped with on the pole wall of stock and connect the recess of self-supporting backstop portion, self-supporting backstop portion includes:
one end of the stopping part body is rotatably connected with one end of the groove, and the other end of the stopping part body is an overhanging end;
the elastic pre-pressing unit is arranged between the overhanging end of the stopping part body and the groove wall of the groove;
and the electromagnetic attraction block is fixed on the inner wall of the groove and used for overcoming the elasticity of the elastic prepressing unit so as to adsorb the stopping part body in the groove.
Further comprising:
the pressure sensor is arranged on the self-drilling high-pressure water disc and used for detecting the contact stress between the self-drilling high-pressure water disc and the rock-soil body;
a first pipeline valve disposed in the first high pressure water passage;
a second pipe valve disposed in the second high pressure water passage.
The mandrel comprises a mandrel body and a shell arranged outside the mandrel body, one end of the mandrel body is connected with the self-drilling high-pressure water disk, a driving device and a gear reduction braking device are arranged on one side of the mandrel body and located inside the shell, and the driving device drives the self-drilling high-pressure water disk to rotate in a reciprocating mode through the gear reduction braking device.
One of the outer wall of the shell and the inner wall of the anchor rod is provided with a limiting bulge, while the other is provided with a limiting groove, and the bulge is matched with the groove;
and the magnetic gauge stand is arranged at the top of the inner cavity of the anchor rod and is used for relatively fixing the mandrel and the anchor rod.
And the shell is in threaded connection with the anchor rod.
The grouting equipment comprises an intelligent grouting pump, the intelligent grouting pump feeds back different signals according to the pressure sensor to select different grouting materials, and the grouting materials are mineral inorganic reinforcing bi-component quick setting materials or superfine cement paste.
A construction method based on the self-drilling anti-floating anchor rod device comprises the following steps:
1) positioning anchor holes, installing a drilling machine, and adjusting the position and the downward inclination angle of the drilling machine according to the hole position of the slope;
2) the anchor rod drilling method comprises the steps that a first pipeline valve in a first high-pressure water channel is opened firstly, a self-drilling high-pressure water disc rotates and performs cutting drilling on a rock-soil body through high-pressure water jet of a first high-pressure water jet cutting hole, and a water pump in a water storage tank adjusts the water pressure of the high-pressure water jet cutting hole according to a feedback signal of a pressure sensor;
3) laterally opening a bearing groove, after drilling to a designed depth, closing a first pipeline valve in a first high-pressure water channel, opening a second pipeline valve in a second high-pressure water channel, and cutting rock and soil on two sides of the anchor rod by a second high-pressure water jet hole to form the bearing groove in the rock and soil on two sides of the anchor rod;
4) the self-supporting stopping part is opened, after the lateral cutting is finished, a second pipeline valve in the high-pressure water channel is closed, the electromagnetic attraction block is closed, the elastic prepressing unit ejects the overhanging end of the stopping part body, the anchor rod is extracted outwards in a small amplitude, and the stopping part body is completely opened and embedded into the bearing groove cut in the step 3);
5) grouting, namely slowly drawing the mandrel upwards from the hollow inner cavity of the anchor rod, simultaneously starting grouting equipment, and conveying grouting materials to the hollow inner cavity of the anchor rod and each bearing groove through a grouting channel in the mandrel;
6) installing a sensor, synchronously completing grouting of the anchor rod when the mandrel is recovered, installing a grout stop plug and a disc-shaped straight-edge tray, screwing a fastening nut of the anchor rod, and installing a piezomagnetic type anchor rod axial force sensor; the piezomagnetic type anchor rod axial force sensor realizes real-time detection on the magnitude of the axial force of the anchor rod through the stress state of the surface of the anchor rod fastening nut.
The invention has the technical effects and advantages that:
the self-drilling anti-floating anchor rod device has the advantages of simple process, high construction efficiency, good economic benefit and the like, overcomes the problems of pore diameter reduction, hole collapse and difficult hole forming caused by the drilling of the anchor rod in loose and broken rock-soil bodies and sand-gravel layers, plays a good anchoring effect, and effectively weakens the disturbance to the surrounding soil body, thereby reducing the conditions of sinking or uplifting even rock burst and the like of the ground due to the change of the internal stress state and the soil body property of the surrounding soil body.
Second high-pressure water jet holes which are communicated with each other are arranged on the rod side wall of the anchor rod and the shaft side wall of the mandrel, the second high-pressure water jet holes are connected with a second high-pressure water channel, and the second high-pressure water jet holes are used for cutting rock and soil on two sides of the anchor rod so as to form bearing grooves in the rock and soil on two sides of the anchor rod; be equipped with self-supporting backstop portion on the pole wall of stock, the opening of self-supporting backstop portion has enlarged the tip of stock in order to increase the lifting surface area, provides anti buoyancy through the soil body weight that self-supporting backstop portion was pocketed and the side friction of stock and slip casting body, has solved stock length design overlength and the stock reaches the problem that will unable increase anti buoyancy after certain length.
And thirdly, the axial force of the anchor rod can be monitored and detected after the construction of the anchor rod is finished, and the anchor rod is ensured not to exceed the limit bearing capacity.
And fourthly, according to the feedback data of the pressure sensor, the pressure of the front rock-soil body is judged, and the water pressure of the front self-drilling high-pressure water disc is adjusted through the high-pressure water pipe, so that the soil cutting efficiency of the high-pressure water jet is kept at a peak value, the energy and the time can be effectively saved, and unnecessary loss caused by different hardness degrees of the rock-soil body is avoided.
And fifthly, the intelligent grouting pump selects different grouting materials for grouting according to the feedback data of the pressure sensor, so that the reliability of the anchor rod and the utilization rate of the grouting materials are improved.
Drawings
FIG. 1 is a schematic diagram of the self-drilling anti-floating anchor rod device assembly structure of the present invention;
FIG. 2 is a schematic diagram of the coaxial sleeve of the anchor rod and the mandrel;
FIG. 3 is a diagrammatic illustration of the anchor rod construction of the present invention;
FIG. 4 is a schematic sectional view of a-a of the self-drilling pressurized water disk of the present invention;
FIG. 5 is a schematic cross-sectional view of a self-drilling pressurized water disk b-b of the present invention;
FIG. 6 is a schematic view of the completion of the construction of the anchor rod of the present invention after it has been driven into a rock-soil mass;
FIG. 7 is a schematic view of the concave structure on the anchor rod of the present invention;
fig. 8 is a schematic view of an embodiment of the present invention providing an expanded version of the self-supporting stop of the anchor;
fig. 9 is a schematic view of a bolt construction provided by an embodiment of the invention;
fig. 10 is a schematic construction flow diagram of a self-drilling anti-floating anchor device according to an embodiment of the invention.
In the figure: 1. self-drilling a high-pressure water tray; 2. a second high-pressure water jet hole; 3. a self-supporting stop; 4. an anchor rod; 5. high-pressure water jet excavating equipment; 6. a magnetic gauge stand; 7. a mandrel body; 8. a housing; 9. a first high pressure water jet cutting hole; 10. an elastic pre-pressing unit; 11. a pressure sensor; 12. a first high-pressure water jet cutting hole fixing plate; 13. a piezomagnetic anchor rod axial force sensor; 14. the anchor rod fastening nut; 15. a dish-shaped straight tray; 16. a grout stopping plug; 17. a rotating shaft; 18. a magnetic conduction groove; 19. an electromagnetic attraction block; 20. grouting a channel; 21. a high pressure water pipe; 22. grouting holes; 23. an intelligent water pump; 24. a grouting pool; 25. a reservoir; 26. an intelligent grouting pump; 27. hole site; 28. a drilling machine; 29. a gear reduction braking device; 30. a transmission device; 31. a limiting chute; 32. and a limiting bulge.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The invention provides a self-drilling anti-floating anchor rod as shown in figures 1-10, which comprises a mandrel and an anchor rod 4, wherein the mandrel and the anchor rod 4 can be connected through a thread or/and a sliding combined structure;
one end of the mandrel is connected with a self-drilling high-pressure water disc 1, and a first high-pressure water channel, a second high-pressure water channel and a grouting channel 20 are arranged in the mandrel;
the grouting port of the grouting pool 24 is connected with an intelligent grouting pump 26, and the intelligent grouting pump 6 is connected with the grouting channel 21;
a water injection port of the reservoir 25 is connected with an intelligent water pump 23, and the intelligent water pump 23 is respectively connected with a first high-pressure water channel and a second high-pressure water channel through a high-pressure water pipe 21; a first pipeline valve is arranged in the first high-pressure water channel; a second pipeline valve is arranged in the second high-pressure water channel.
The pressure sensor is used for detecting the water pressure in the first high-pressure water channel;
the anchor 4 has:
a hollow cavity providing the mandrel connection passage and a grouting passage after the anchor rod is fixed, and the built-in threads provide a mode for connection with the mandrel 7;
second high-pressure water jet holes which are communicated with each other are arranged on the rod side wall of the anchor rod and the shaft side wall of the mandrel, the second high-pressure water jet holes are connected with the second high-pressure water channel, and the second high-pressure water jet holes are used for cutting rock and soil on two sides of the anchor rod so as to form bearing grooves in the rock and soil on two sides of the anchor rod;
a self-supporting stop disposed on the outer wall of the bolt, the self-supporting stop being disposed adjacent to the second high pressure water jet hole and being inoperative during drilling and partially extendable into the bearing groove during anchoring of the bolt device to improve anti-floating force of the stop body.
The pressure sensor 11 is electrically connected with the intelligent water pump 23 and the intelligent grouting pump 26, the intelligent water pump 23 and the intelligent grouting pump 26 receive the feedback signal of the pressure sensor 11 to adjust the water pressure and the grouting material, and the pressure sensor 11 can adopt a resonant pressure sensor.
The grouting materials in the grouting pool 24 comprise mineral inorganic reinforced bi-component quick-setting materials and superfine cement paste, in the feedback signals of the pressure sensor 11, the grouting materials are the mineral inorganic reinforced bi-component quick-setting materials when the pressure of the rock-soil body is high, and the grouting materials are the superfine cement paste when the pressure of the rock-soil body is low.
Be equipped with on the pole wall of stock and connect the recess of self-supporting backstop portion, self-supporting backstop portion includes:
one end of the stopping part body is rotatably connected with one end of the groove, and the other end of the stopping part body is an overhanging end;
the elastic pre-pressing unit is arranged between the overhanging end of the stopping part body and the groove wall of the groove;
and the electromagnetic attraction block 19 is fixed on the inner wall of the groove and used for overcoming the elastic force of the elastic pre-pressing unit so as to adsorb the stopping part body in the groove.
The self-supporting stopping part 3 of the anchor rod 4 is internally provided with the elastic prepressing unit 10 which can control the opening of the stopping part body and improve the anti-buoyancy of the stopping part body.
The middle of the shell 8 is provided with a mandrel body 7, one end of the mandrel body 7 is connected with the self-drilling high-pressure water disk 1, one side of the mandrel body 7 and the inner part of the shell 8 are provided with a driving device and a gear reduction braking device, the driving device is a hydraulic driving motor, the gear reduction braking device is a planetary gear reducer and has a braking function, and the driving device performs reciprocating rotation on the self-drilling high-pressure water disk 1 through the gear reduction braking device.
The invention also provides a construction method of the self-drilling anti-floating anchor rod, which comprises the following steps:
1) positioning anchor holes, installing a drilling machine, and adjusting the position and the downward inclination angle of the drilling machine according to the hole position of the slope;
2) the anchor rod drilling method comprises the steps that a first pipeline valve in a first high-pressure water channel is opened firstly, a self-drilling high-pressure water disc rotates and performs cutting drilling on a rock-soil body through high-pressure water jet of a first high-pressure water jet cutting hole, and a water pump in a water storage tank adjusts the water pressure of the high-pressure water jet cutting hole according to a feedback signal of a pressure sensor;
3) laterally opening a bearing groove, after drilling to a designed depth, closing a first pipeline valve in a first high-pressure water channel, opening a second pipeline valve in a second high-pressure water channel, and cutting rock and soil on two sides of the anchor rod by a second high-pressure water jet hole to form the bearing groove in the rock and soil on two sides of the anchor rod;
4) the self-supporting stopping part is opened, after the lateral cutting is finished, a second pipeline valve in the high-pressure water channel is closed, the electromagnetic attraction block is closed, the elastic prepressing unit ejects the overhanging end of the stopping part body, the anchor rod is extracted outwards in a small amplitude, and the stopping part body is completely opened and embedded into the bearing groove cut in the step;
5) grouting, namely slowly drawing the mandrel upwards from the hollow inner cavity of the anchor rod, simultaneously starting grouting equipment, and conveying grouting materials to the hollow inner cavity of the anchor rod and each bearing groove through a grouting channel in the mandrel;
6) installing a sensor, synchronously completing grouting of the anchor rod when the mandrel is recovered, installing a grout stop plug and a disc-shaped straight-edge tray, screwing a fastening nut of the anchor rod, and installing a piezomagnetic type anchor rod axial force sensor; the piezomagnetic type anchor rod axial force sensor realizes real-time detection on the magnitude of the axial force of the anchor rod through the stress state of the surface of the anchor rod fastening nut.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (9)
1. A self-drilling anti-floating anchor device, comprising:
an anchor having a hollow interior;
the mandrel is coaxially arranged in the hollow inner cavity of the anchor rod, and a first high-pressure water channel, a second high-pressure water channel and a grouting channel are arranged in the mandrel;
the self-drilling high-pressure water disc is coaxially connected to the end part of the mandrel, extends out of the anchor rod and can rotate around the axis direction of the anchor rod, and a first high-pressure water jet cutting hole connected with the first high-pressure water channel and a grouting hole connected with the grouting channel are formed in the self-drilling high-pressure water disc; the first high-pressure water jet hole is used for cutting and drilling rock and soil;
second high-pressure water jet holes which are communicated with each other are arranged on the rod side wall of the anchor rod and the shaft side wall of the mandrel, the second high-pressure water jet holes are connected with the second high-pressure water channel, and the second high-pressure water jet holes are used for cutting rock and soil on two sides of the anchor rod so as to form bearing grooves in the rock and soil on two sides of the anchor rod;
a self-supporting stop disposed on the outer wall of the bolt, the self-supporting stop being disposed adjacent to the second high pressure water jet hole and being inoperative during drilling and capable of partially extending into the bearing groove during anchoring of the bolt device, thereby improving anti-buoyancy of the stop body.
2. A self-drilling anti-floating anchor rod device according to claim 1, wherein the second high-pressure water jet hole comprises a plurality of high-pressure water jet holes which are cut to form a plurality of bearing grooves, and the plurality of bearing grooves are distributed around the anchor rod in a bionic tree root shape;
the wall of the anchor rod is provided with one self-supporting stopping portion corresponding to each bearing groove.
3. A self drilling anti-floating anchor device according to claim 1, wherein the wall of the anchor is provided with a recess connecting the self supporting stop, the self supporting stop comprising:
one end of the stopping part body is rotatably connected with one end of the groove, and the other end of the stopping part body is an overhanging end;
the elastic pre-pressing unit is arranged between the overhanging end of the stopping part body and the groove wall of the groove;
and the electromagnetic attraction block is fixed on the inner wall of the groove and used for overcoming the elasticity of the elastic prepressing unit so as to adsorb the stopping part body in the groove.
4. A self drilling anti-floating anchor device according to claim 1, further comprising:
the pressure sensor is arranged on the self-drilling high-pressure water disc and used for detecting the contact stress between the self-drilling high-pressure water disc and the rock-soil body;
a first pipeline valve disposed in the first high pressure water passage;
a second pipe valve disposed in the second high pressure water passage.
5. The self-drilling anti-floating anchor rod device according to claim 4, wherein the mandrel comprises a mandrel body and a shell arranged outside the mandrel body, one end of the mandrel body is connected with the self-drilling high-pressure water disk, a driving device and a gear reduction braking device are arranged on one side of the mandrel body and positioned inside the shell, and the driving device drives the self-drilling high-pressure water disk to rotate back and forth through the gear reduction braking device.
6. A self-drilling anti-floating anchor device according to claim 5, wherein one of the outer wall of the housing and the inner wall of the anchor is provided with a limiting projection and the other is provided with a limiting groove, the projection cooperating with the groove;
and the magnetic gauge stand is arranged at the top of the inner cavity of the anchor rod and is used for relatively fixing the mandrel and the anchor rod.
7. A self drilling anti-floating anchor device according to claim 5, wherein the housing and anchor are threadedly connected.
8. The self-drilling anti-floating anchor rod device according to claim 4, wherein the grouting equipment comprises an intelligent grouting pump, the intelligent grouting pump selects different grouting materials according to different signals fed back by the pressure sensor, and the grouting materials are mineral inorganic reinforcing bi-component quick setting materials or superfine cement paste.
9. A construction method of a self-drilling anti-floating anchor device according to any one of claims 1 to 8, comprising the steps of:
1) positioning anchor holes, installing a drilling machine, and adjusting the position and the downward inclination angle of the drilling machine according to the hole position of the slope;
2) the anchor rod drilling method comprises the steps that a first pipeline valve in a first high-pressure water channel is opened firstly, a self-drilling high-pressure water disc rotates and performs cutting drilling on a rock-soil body through high-pressure water jet of a first high-pressure water jet cutting hole, and a water pump in a water storage tank adjusts the water pressure of the high-pressure water jet cutting hole according to a feedback signal of a pressure sensor;
3) laterally opening a bearing groove, after drilling to a designed depth, closing a first pipeline valve in a first high-pressure water channel, opening a second pipeline valve in a second high-pressure water channel, and cutting rock and soil on two sides of the anchor rod by a second high-pressure water jet hole to form the bearing groove in the rock and soil on two sides of the anchor rod;
4) the self-supporting stopping part is opened, after the lateral cutting is finished, a second pipeline valve in the high-pressure water channel is closed, the electromagnetic attraction block is closed, the elastic prepressing unit ejects the overhanging end of the stopping part body, the anchor rod is extracted outwards in a small amplitude, and the stopping part body is completely opened and embedded into the bearing groove cut in the step 3);
5) grouting, namely slowly drawing the mandrel upwards from the hollow inner cavity of the anchor rod, simultaneously starting grouting equipment, and conveying grouting materials to the hollow inner cavity of the anchor rod and each bearing groove through a grouting channel in the mandrel;
6) installing a sensor, synchronously completing grouting of the anchor rod when the mandrel is recovered, installing a grout stop plug and a disc-shaped straight-edge tray, screwing a fastening nut of the anchor rod, and installing a piezomagnetic type anchor rod axial force sensor; the piezomagnetic type anchor rod axial force sensor realizes real-time detection on the magnitude of the axial force of the anchor rod through the stress state of the surface of the anchor rod fastening nut.
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|---|---|---|---|
| CN202110552407.5A CN113202091B (en) | 2021-05-20 | 2021-05-20 | Self-drilling anti-floating anchor rod device and construction method |
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| CN202110552407.5A CN113202091B (en) | 2021-05-20 | 2021-05-20 | Self-drilling anti-floating anchor rod device and construction method |
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| CN113202091B CN113202091B (en) | 2022-01-04 |
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| US20090074516A1 (en) * | 2007-08-17 | 2009-03-19 | Jennmar Corporation | Self Drilling Rock Bolt |
| KR20130020556A (en) * | 2012-07-23 | 2013-02-27 | 김민우 | Method of constructing thread bar anchor in bedrock having high uplift resistance force and thread bar anchor used therein |
| CN206815348U (en) * | 2017-06-03 | 2017-12-29 | 孙强 | A kind of civil engineering side slope protection grouted anchor bar |
| CN109356630A (en) * | 2018-11-29 | 2019-02-19 | 西南石油大学 | A kind of self-advancing type hollow grouting anchor that can monitor hydraulic pressure and application method |
| CN111549803A (en) * | 2020-05-21 | 2020-08-18 | 义乌工商职业技术学院 | Net-crawling guniting device for slope protection hanging net and use method |
| CN111648803A (en) * | 2020-05-13 | 2020-09-11 | 河南理工大学 | Anchor cable self-drilling and rapid anchoring construction method based on water jet technology |
| CN112049671A (en) * | 2020-09-27 | 2020-12-08 | 西安建筑科技大学 | Self-propelled hollow grouting expansion anchor rod and construction method thereof |
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2021
- 2021-05-20 CN CN202110552407.5A patent/CN113202091B/en active Active
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| US20090074516A1 (en) * | 2007-08-17 | 2009-03-19 | Jennmar Corporation | Self Drilling Rock Bolt |
| KR20130020556A (en) * | 2012-07-23 | 2013-02-27 | 김민우 | Method of constructing thread bar anchor in bedrock having high uplift resistance force and thread bar anchor used therein |
| CN206815348U (en) * | 2017-06-03 | 2017-12-29 | 孙强 | A kind of civil engineering side slope protection grouted anchor bar |
| CN109356630A (en) * | 2018-11-29 | 2019-02-19 | 西南石油大学 | A kind of self-advancing type hollow grouting anchor that can monitor hydraulic pressure and application method |
| CN111648803A (en) * | 2020-05-13 | 2020-09-11 | 河南理工大学 | Anchor cable self-drilling and rapid anchoring construction method based on water jet technology |
| CN111549803A (en) * | 2020-05-21 | 2020-08-18 | 义乌工商职业技术学院 | Net-crawling guniting device for slope protection hanging net and use method |
| CN112049671A (en) * | 2020-09-27 | 2020-12-08 | 西安建筑科技大学 | Self-propelled hollow grouting expansion anchor rod and construction method thereof |
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| CN113202091B (en) | 2022-01-04 |
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