CN105952374A - Complex soil layer anchor cable hole drill pore-forming method - Google Patents
Complex soil layer anchor cable hole drill pore-forming method Download PDFInfo
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- CN105952374A CN105952374A CN201610300054.9A CN201610300054A CN105952374A CN 105952374 A CN105952374 A CN 105952374A CN 201610300054 A CN201610300054 A CN 201610300054A CN 105952374 A CN105952374 A CN 105952374A
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- soil
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- 238000000034 method Methods 0.000 title claims abstract description 58
- 239000002689 soil Substances 0.000 title claims abstract description 33
- 238000005553 drilling Methods 0.000 claims abstract description 49
- 239000002002 slurry Substances 0.000 claims abstract description 27
- 239000004568 cement Substances 0.000 claims abstract description 21
- 239000004576 sand Substances 0.000 claims abstract description 16
- 239000000440 bentonite Substances 0.000 claims abstract description 12
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 12
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000004927 clay Substances 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000000956 alloy Substances 0.000 claims abstract description 5
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 5
- 239000002893 slag Substances 0.000 claims abstract description 4
- 239000011440 grout Substances 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 6
- 230000035515 penetration Effects 0.000 claims description 6
- 238000004537 pulping Methods 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 230000001141 propulsive effect Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 12
- 238000004873 anchoring Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 4
- 238000009830 intercalation Methods 0.000 abstract 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 7
- 229910052782 aluminium Inorganic materials 0.000 description 5
- 239000004411 aluminium Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 5
- 239000011083 cement mortar Substances 0.000 description 4
- 241001074085 Scophthalmus aquosus Species 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 241000537371 Fraxinus caroliniana Species 0.000 description 2
- 235000010891 Ptelea trifoliata Nutrition 0.000 description 2
- PPTYJKAXVCCBDU-UHFFFAOYSA-N Rohypnol Chemical group N=1CC(=O)N(C)C2=CC=C([N+]([O-])=O)C=C2C=1C1=CC=CC=C1F PPTYJKAXVCCBDU-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000010438 granite Substances 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/02—Drilling rigs characterised by means for land transport with their own drive, e.g. skid mounting or wheel mounting
-
- 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
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
- E21B33/138—Plastering the borehole wall; Injecting into the formation
-
- 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
-
- 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
- E21D20/021—Grouting with inorganic components, e.g. cement
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Inorganic Chemistry (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a complex soil layer anchor cable hole drill pore-forming method comprising the following steps: 1, using a HM-90 type crawler type drill carriage drilling tool having a three-wing alloy drill bit to cut the soil body; 2, in drilling, configured slurry is pressed from the drill bit through a hollow drill rod under the pressure of a grouting pump; 3, detecting drill slag carried by the slurry in drilling so as to determine the drilling soil layer property; 4, using 1.2-1.4 weight ratio slurry to protect wall when the machine drills into a silty clay intercalating with a gravel layer, and using raw soil slurry supporting wall when drilling other soil layers; 5, adding cement slurry of water cement ratio 1:1-0.5:1 into a bentonite slurry used for supporting wall when a sand layer is drilled; 6, adjusting cement addition in the supporting wall slurry according to different soil layers in drilling. The complex soil layer anchor cable hole drill pore-forming method can effectively reduce slurry proportion in the supporting wall components, can reduce anchoring force influence by the anchor cable hole wall mud layer in a maximum level, and the construction period is short; the equipment and material resource investment is less.
Description
Technical field
The present invention relates to a kind of complex random systems prestressed anchor cable borehole forming hole method, belong to automatic control technology field.
Background technology
Ground anchor cable drilling hole is because of its complex geologic conditions, when particularly running into dirty sand or silt particle alternating layers, less
Easily pore-forming, at present, traditional anchor cable boring method typically uses pneumatic down-the-hole hammer drilling method and sleeve pipe follow-up
Drilling method.And use sleeve pipe follow-up drilling method, although solve the problem being difficult to pore-forming, collapse hole, but
There is also some shortcomings, such as air quantity and blast to air compressor machine require height, and energy consumption is big, and cost is high；Construction
Cycle is longer, affects especially prominent in the engineering that the duration is tight.And use bentonite circulating mud retaining wall technique,
When running into dirty sand or silt particle alternating layers, need to suitably increase mud balance, thus can be inevitably in hole
Form mud skin on wall, if can not effectively remove the mud skin attached on hole wall when anchor rope grouting, will certainly make
Become and between anchoring body and surrounding soil, form one layer of clay sealing coat, reduce between anchoring body and surrounding soil
Frictional force, thus reduce the anti-pulling capacity of anchor cable.
The patent of Application No. CN200710075830.0 discloses a kind of anchor bolt construction boring method, uses and bores
Machine drives front end to be provided with the tubular element rotary drilling of drill bit, is provided with drainage channel on tubular element,
Liquid is carried to drill bit by this drainage channel；Described through drainage channel to the liquid of drill bit conveying or high pressure
Liquid is flowed out by the outlet vertical with drilling axis direction set on this tubular element or drill bit or nozzle,
And act on anchor hole hole wall, clean or add rough anchor hole hole wall and reaming can be carried out；A kind of anchor bolt construction is boring
Tubular element, is used for connecting drill bit and rig, and is carried out rotary drilling, at described tubulose structure by rig driving
On part, it is additionally provided with to carry the drainage channel of the required liquid of boring.
The patent of Application No. CN201410016099.4 discloses the Drilling Jig Structure of a kind of main chord of standard section,
Being processed to form, for the main chord two ends at standard knot, the pin-and-hole being mutually perpendicular to and staggering, this Drilling Jig Structure includes
Base, the first die holder, the second die holder, end face backup plate, the first clamp assembly and the second clamp assembly；The
One die holder and the second die holder are separately positioned on the first end and second end of base；End face backup plate is arranged on base
Between end and first die holder of the first end；Vertically being provided with drill bushing on each die holder, drill bushing is provided with brill
Trepanning；Positioning sleeve and the alignment pin coordinated with positioning sleeve, two die holders it are horizontally arranged with on each die holder
Drill bushing between distance be L1, mutually stagger and the distance that staggers between drill bushing and the positioning sleeve on each die holder
For L2；First clamp assembly is for laterally clamping main chord, and the second clamp assembly is for main chord
Vertically clamp.
The patent of Application No. CN201310641884.4 discloses the aluminium section bar boring of a kind of automatic transport location
Machine and boring method, boring machine includes base, hoistable platform, conveying mechanism, clamp system and borehole drill construction,
Base top arranges hoistable platform, conveying mechanism and clamp system and is located at side by side on hoistable platform, borehole drill construction
It is located at base side；According to the conveying direction of aluminium section bar, conveying mechanism, clamp system and borehole drill construction are successively
Connect.Boring method is to first pass through hoistable platform to adjust the height of each mechanism, then starts conveying mechanism, will
The end to be punctured of aluminium section bar is delivered on borehole drill construction, then passes through clamp system clamping aluminium section bar, finally by
Holed in aluminium section bar end by borehole drill construction.
The patent of Application No. CN201310496909.6 discloses the boring side of a kind of high-frequency ceramic circuit board
Method, first makes boring file, requires to be converted to PCB drilling program by CAM software by position, hole, right
The diagonal angle layout of foramen primum position, then designs drilling sequences；The boring file data that importing makes is to rig, by boring
Machine operation file, by borer drill rod to zero-bit, sets driller parameters, and normal drill is pressed in small-bore, more than 4.0mm
The high-frequency ceramic circuit board in above aperture first bores nozzle drill hole with 3.0mm, is more directly drilled to sample wells；By boring
Order carries out the preparation before boring, first chooses high-frequency ceramic circuit board, carry out the most successively lamination,
Upper padding plate, upper substrate, upper aluminium flake；Hole by rig boot program；Lower plate after boring, mill peak,
Aperture blowing, inspection, obtain finished product.
The patent of Application No. CN201310399529.0 discloses a kind of twin shaft automatic drilling machine and boring side
Method, a kind of twin shaft automatic drilling machine includes symmetrically arranged two motors, the position that two motor drill bits are opposed
For the centre of location, the centre of location has the positioning tool for positioning blank；The two ends of positioning tool are respectively provided with
For carrying the feeding parts of blank and for unloading the blanking parts of blank.A kind of twin shaft automatic drilling machine
Boring method includes: blank to be processed is placed in charge channel, and blank is sent to feeding hands, and feeding hands is by
Blank is sent to positioning tool location by one air cylinder driven；In the centre of location by the drill bit of symmetrical motor to base
Material carries out Drilling operation, and motor is return；Second air cylinder driven splicing hands unloads blank, and is sent to discharge channel.
The patent of Application No. CN200510073219.5 discloses a kind of boring method and a kind of printed circuit board (PCB)
Process equipment, described method and apparatus can improve such as hole by making the amount of deflection of bit point of the drill minimize
Positioning precision and the crudy of circularity or the like in processed hole, and improve working (machining) efficiency.Corresponding
In type or the occupation mode of drill bit, predefine the drill bit when being clamped by mandrel and stretch out the extension elongation of mandrel.
Select a drill bit corresponding to the shape in hole to be bored in the printed circuit boards, and cause described mandrel
Clamp this drill bit so that selected drill bit stretches out the extension elongation of this mandrel corresponding to this selected drill bit.So
After, control the mandrel movement relative to printed circuit board (PCB), and rotated the selected drill bit of driving with in print by mandrel
Hole on printed circuit board.
The patent of Application No. CN200810242920.9 disclose a kind of high density, small-bore multi-sheet printed
The mechanical drilling method of circuit board, by improving drilling parameter, improves rig yield and drilling quality is good.
The small-aperture high-density drilling method of the printed circuit board (PCB) of the present invention, key step includes: to zero-bit, set brill
Machine parameter, brill location hole, upper padding plate, upper substrate, upper aluminium flake, hole, grind peak, aperture blowing, inspection,
Wherein drilling sequences is set as with the stepping method of coordinate pitch of holes >=4mm.Require to pass through CAM by position, hole
Be converted to PCB drilling program, to the sequential organization of foramen primum position, design by the standard of coordinate pitch of holes >=4mm and bore
Hole order.Drill spindle presser feet pad uses flexible glue plastics presser feet pad；Bit uses the UC that chip removal is effective
Type bores nozzle, and the substrate total thickness drilled is up to 4.5～4.8mm.
In sum, pneumatic down-the-hole hammer drilling method is used to there is also following weak point: 1, to air compressor machine
Air quantity and blast require height, and energy consumption is big, and cost is high.2, all kinds of rock stratum and hard plastic～hard cohesive soil it are suitable for
Stratum.3, when plasticity soil layer creeps into, impacter impact is discontinuous, and row's powder is not clean, and drilling efficiency is low,
Easily burying.
Summary of the invention
It is an object of the invention to provide a kind of complex random systems prestressed anchor cable borehole that can overcome above-mentioned technical problem
Forming hole method；The present invention ties with original soil pulping retaining wall technique mutually by using bentonite circulating mud retaining wall technique
The boring method closed, adds cement mortar, root in drilling process in the bentonite slurry that original retaining wall uses
According to Different Strata, cement addition in slurry coat method is adjusted, so effectively reduces mud and become at retaining wall
Ratio shared in Fen, farthest decreases the impact on anchor force of the anchor cable mud cake on the wall of borehole, the most not only
Can guarantee that hole quality, moreover it is possible to improve anchor force, and equipment and materials less input, short construction period, one-tenth
This is relatively low.
A kind of complex random systems prestressed anchor cable borehole forming hole method of the present invention specifically includes following steps:
(1) the three wings alloy bit cutting soil body is used by HM-90 type crawler jumbo drilling tool；
(2), when creeping into, the mud configured is under the pressure of grouting pump, and serosity passes through hollow drill pipe from drill bit
Middle extrusion, under the effect of drill bit propulsive force and mud, mud carries the native slag under drilling from drilling rod and hole wall
Between space between discharge；
(3) check that when boring the boring mud that mud carries judges the soil layer property crept into；
(4) when creeping into silty clay folder coarse sand gravel bed, the mud off using proportion to be 1.2～1.4；
Other soil layer use original soil pulping retaining wall creep into, proportion is 1.05, and the viscosity controlling mud be 16～22s it
Between, sand factor < 5%；
(5) when passing through layer of sand and silt particle alternating layers, the bentonite slurry that original retaining wall uses adds water ash
Than the cement grout for 1:1～0.5:1, the described ratio of mud refers to water used during mixing cement grout and cement
Mass ratio；
(6) according to Different Strata, cement addition in slurry coat method is adjusted, so in drilling process
Effectively reduce the ratio that mud is shared in retaining wall composition, the most less anchor cable mud cake on the wall of borehole pair
The impact of anchor force, and by mud pressure in raising hole, play it and hole wall is extruded and balanced action, with
Time slow down rate of penetration, and withdrawing drilling tool back and forth in same sector hole, hole wall formed mud skin, thus
Reach retaining wall effect.
The present invention and traditional pneumatic down-the-hole hammer drilling method, sleeve pipe follow-up drilling method and bentonite circulation mud
Slurry retaining wall drilling method is compared, the advantage of a kind of complex random systems prestressed anchor cable borehole forming hole method of the present invention
It is by adding cement mortar in the bentonite slurry that original retaining wall uses, and according to difference in drilling process
Cement addition in slurry coat method is adjusted by stratum, so significantly reduces mud in retaining wall composition
Shared ratio, the most less anchor cable mud cake on the wall of borehole impact on anchor force, and construction period
Short, equipment, material resources less investment, can guarantee that hole quality and anchor force can be improved.
Detailed description of the invention
Below embodiments of the present invention are described in detail.A kind of complex random systems anchor cable of the present invention
Hole drilling forming hole method specifically includes following steps:
(1) the three wings alloy bit cutting soil body is used by HM-90 type crawler jumbo drilling tool；
(2), when creeping into, the mud configured is under the pressure of grouting pump, and serosity passes through hollow drill pipe from drill bit
Middle extrusion, under the effect of drill bit propulsive force and mud, mud carries the native slag under drilling from drilling rod and hole wall
Between space between discharge；
(3) check that when boring the boring mud that mud carries judges the soil layer property crept into；
(4) when creeping into silty clay folder coarse sand gravel bed, the mud off using proportion to be 1.2～1.4；
Other soil layer use original soil pulping retaining wall creep into, proportion is 1.05, and the viscosity controlling mud be 16～22s it
Between, sand factor < 5%；
(5) when passing through layer of sand and silt particle alternating layers, the bentonite slurry that original retaining wall uses adds water ash
Than the cement grout for 1:1～0.5:1, the described ratio of mud refers to water used during mixing cement grout and cement
Mass ratio；
(6) according to Different Strata, cement addition in slurry coat method is adjusted, so in drilling process
Effectively reducing the ratio that mud is shared in retaining wall composition, the most less anchor cable mud cake on the wall of borehole is to anchor
Gu the impact of power, and by mud pressure in raising hole, play it and hole wall is extruded and balanced action, simultaneously
Slow down rate of penetration, and withdrawing drilling tool back and forth in same sector hole, form mud skin at hole wall, thus reach
To retaining wall effect.
A kind of complex random systems prestressed anchor cable borehole forming hole method of the present invention is with No. 7 line west of China Shenzhen subway
Li Hu station pattern foundation pit supporting structure prestress anchorage cable engineering is for relying on, and stratum residing for this engineering anchor cable is mainly from top to bottom
Plain fill, rush diluvial formation silty clay, gravelly sand, slide rock silty clay and granite residual gravel matter cohesive soil,
Particularly creep into pass through gravel layer and granite residual gravelly clay layer time, owing to this stratum soil property is uneven,
By easily softening transform after disturbance under saturation.For ensureing that logical excavation of foundation pit is safe and orderly carries out.
A kind of complex random systems prestressed anchor cable borehole forming hole method of the present invention is by using bentonite circulating mud retaining wall
The boring method that technique and original soil pulping retaining wall technique combine, and the bentonite slurry used at original retaining wall
Middle interpolation cement mortar, is adjusted cement addition in slurry coat method according to Different Strata in drilling process.
Specifically comprise the following steps that
1, rig uses HM-90 type crawler belt to bore, and this rig advantage is that moment of torsion is big, hydraulic drive.Drilling tool
Use three wings alloy bit；
2, circulating mud system uses 3SNS type grouting pump pumping mud, this grouting pump nominal stream for slurry equipment
Amount reaches 100L/min, and can control for slurry pressure and flow；
3, judge stratum according to boring mud, select the mud of different specific weight；
When creeping into silty clay folder coarse sand gravel bed, the mud off using proportion to be 1.2～1.4, and
The bentonite slurry that originally retaining wall uses adds cement mortar, the water that serosity uses the ratio of mud to be 1:1～0.5:1
Slurry liquid, the described ratio of mud refers to the mass ratio of water used during mixing cement grout and cement, is creeping into
Cement addition in slurry coat method is adjusted by journey according to Different Strata.Other soil layer uses original soil pulping
Retaining wall creeps into, and proportion is 1.05, and the viscosity controlling mud is between 16～22s, sand factor < 5%.
4, the measure taked in boring procedure；
In boring procedure, the difference according to formation condition uses different measures of creeping into, and should take during construction
Following measures:
1. check when boring that the boring mud that mud carries judges the soil layer property crept into.
2. in different soil, use different penetration rates, for silty clay folder cobble layer of sand easy collapse hole,
Shrinkage cavity soil layer uses slow-motion chi and high drilling speed, improves head pressure in hole, and withdrawing draws circle back and forth, sweeps
Hole is to ensure aperture requirement；Farinose argillic horizon is then used to medium speed, it is impossible to the fastest.
3. suitably accelerate penetration rate at free section of anchor cable, suitably slow down penetration rate to ensure to bore at anchoring section
The requirement of bore dia.
The above, the only detailed description of the invention of the present invention, but protection scope of the present invention is not limited to
This, any those familiar with the art is in scope disclosed by the invention, it is possible to readily occur in
Change or replacement, all should contain within the scope of the invention as claimed.
Claims (5)
1. a complex random systems prestressed anchor cable borehole forming hole method, it is characterised in that comprise the following steps:
(1) the three wings alloy bit cutting soil body is used by HM-90 type crawler jumbo drilling tool；
(2), when creeping into, the mud configured is under the pressure of grouting pump, and serosity passes through hollow drill pipe from drill bit
Middle extrusion, under the effect of drill bit propulsive force and mud, mud carries the native slag under drilling from drilling rod and hole wall
Between space between discharge；
(3) check that when boring the boring mud that mud carries judges the soil layer property crept into；
(4) it is adjusted reducing to cement addition in slurry coat method according to Different Strata in drilling process
The ratio that mud is shared in retaining wall composition.
A kind of complex random systems prestressed anchor cable borehole forming hole method the most according to claim 1, it is characterised in that
In described step (3), when creeping into silty clay folder coarse sand gravel bed, the mud using proportion to be 1.2～1.4
Slurry retaining wall；Other soil layer uses original soil pulping retaining wall to creep into, and proportion is 1.05, and the viscosity controlling mud is
Between 16～22s, sand factor < 5%.
A kind of complex random systems prestressed anchor cable borehole forming hole method the most according to claim 1, it is characterised in that
In described step (3), when passing through layer of sand and silt particle alternating layers, in the bentonite slurry that original retaining wall uses
Adding the cement grout that the ratio of mud is 1:1～0.5:1, the described ratio of mud refers to during mixing cement grout used
Water and the mass ratio of cement.
A kind of complex random systems prestressed anchor cable borehole forming hole method the most according to claim 1, it is characterised in that
In described step (4), play it to hole wall extruding and balanced action by mud pressure in improving hole.
A kind of complex random systems prestressed anchor cable borehole forming hole method the most according to claim 1, it is characterised in that
In described step (4), slow down rate of penetration, and withdrawing drilling tool back and forth in same sector hole simultaneously,
Hole wall forms mud skin to reach retaining wall effect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610300054.9A CN105952374B (en) | 2016-05-06 | 2016-05-06 | A kind of complex random systems prestressed anchor cable borehole forming hole method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610300054.9A CN105952374B (en) | 2016-05-06 | 2016-05-06 | A kind of complex random systems prestressed anchor cable borehole forming hole method |
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| CN105952374B CN105952374B (en) | 2019-02-05 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107905728A (en) * | 2017-11-15 | 2018-04-13 | 中国水利水电第十六工程局有限公司 | Rockfill area drilling construction method |
| CN108086910A (en) * | 2018-01-18 | 2018-05-29 | 北京地矿工程建设有限责任公司 | Long spire extruded and extended pile drilling machine boring method and long spire extruded and extended pile drilling machine |
| CN108590515A (en) * | 2018-05-09 | 2018-09-28 | 上海元易勘测设计有限公司 | High viscosity thick fill stratum forming hole method |
| CN109113056A (en) * | 2018-09-04 | 2019-01-01 | 中铁大桥局集团有限公司 | A method of preventing bored pile construction process middle hole wall and collapses |
| CN109133742A (en) * | 2018-09-04 | 2019-01-04 | 中铁大桥局集团有限公司 | A kind of composite sludge suitable for stratum of easily loosely collapsing |
| CN117449756A (en) * | 2023-12-18 | 2024-01-26 | 贵州大学 | Drilling equipment suitable for multi-stratum seismic exploration |
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| CN109133742A (en) * | 2018-09-04 | 2019-01-04 | 中铁大桥局集团有限公司 | A kind of composite sludge suitable for stratum of easily loosely collapsing |
| CN117449756A (en) * | 2023-12-18 | 2024-01-26 | 贵州大学 | Drilling equipment suitable for multi-stratum seismic exploration |
| CN117449756B (en) * | 2023-12-18 | 2024-02-27 | 贵州大学 | Drilling equipment suitable for multi-stratum seismic exploration |
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