CN107503681A - Karst area is grown up anchor cable forming hole method - Google Patents
Karst area is grown up anchor cable forming hole method Download PDFInfo
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- CN107503681A CN107503681A CN201710859189.3A CN201710859189A CN107503681A CN 107503681 A CN107503681 A CN 107503681A CN 201710859189 A CN201710859189 A CN 201710859189A CN 107503681 A CN107503681 A CN 107503681A
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000005553 drilling Methods 0.000 claims abstract description 56
- 241001074085 Scophthalmus aquosus Species 0.000 claims abstract description 34
- 238000010276 construction Methods 0.000 claims abstract description 20
- 238000013461 design Methods 0.000 claims description 35
- 238000004873 anchoring Methods 0.000 claims description 19
- 238000007569 slipcasting Methods 0.000 claims description 17
- 239000011435 rock Substances 0.000 claims description 15
- 239000002002 slurry Substances 0.000 claims description 11
- 230000002411 adverse Effects 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 238000007596 consolidation process Methods 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 230000006641 stabilisation Effects 0.000 claims 1
- 238000011105 stabilization Methods 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 239000011083 cement mortar Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 235000019353 potassium silicate Nutrition 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 4
- 239000011148 porous material Substances 0.000 description 3
- 239000011398 Portland cement Substances 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000007592 spray painting technique Methods 0.000 description 1
- 238000005728 strengthening 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
-
- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
Grown up anchor cable forming hole method the invention provides a kind of karst area, be related to drilling construction field.Karst area anchor cable forming hole method of growing up comprises the following steps：Step 1: rig is carried out in place；Step 2: naked brill first；Step 3: one-level is with pipe construction；Step 4: secondary naked brill.The present invention solves that existing anchor cable drilling construction pore-forming efficiency is slow, cost is high, duration too long of technical problem.
Description
Technical field
The present invention relates to drilling construction technical field, grown up anchor cable forming hole method more particularly, to a kind of karst area.
Background technology
Prestress anchorage cable：By drilling through soft stratum or sliding surface, one end (anchor pole) is anchored in hard rock stratum
(title Inner bolt head), tensioning then is carried out in another free end (claiming outer anchor head), so as to apply pressure to unstable rock to rock stratum
Body is anchored, and this method claims prestress anchorage cable, and abbreviation anchor cable, domestic application is more, such as long south of the River bank works in Lianziya dangerous rock mass
Such a anchor cable is all employed in improvement and Huitong County center street landslide control.
China is vast in territory, and topographic and geologic situation is complicated and changeable, the geology distributed areas such as solution cavity development, fault belt ratio
It is wide.Under normal circumstances, anchor cable strengthening construction is carried out to present situation side slope, anchor cable drilling construction is crucial problem, and pore-forming mistake
The geology such as solution cavity, fault belt, round gravel layer are passed through in journey the problems such as bit freezing, collapse hole, pore-forming efficiency be slow easily occur, seriously
Influence anchor cable construction progress.Existing treatment technology has the following disadvantages：Pore-forming efficiency is slow, consolidates the large-scale solution cavity of injecting treatment repeatedly
Cost is high, it is oversize to need to handle the construction period repeatedly.
Based on this, anchor cable forming hole method is grown up the invention provides a kind of karst area to solve above-mentioned technical problem.
The content of the invention
Grow up anchor cable forming hole method it is an object of the invention to provide a kind of karst area, exist in the prior art to overcome
The defects of, there is provided the karst area of anchor cable fast pore-creating is grown up anchor cable pore-forming under karst, cranny development area unfavorable geological condition
Method, the practical process, different implementing process are taken for different geology, and engineering cost can be saved after implementing, accelerated
Duration progress.
Based on above-mentioned first purpose, grown up anchor cable forming hole method, including following step the invention provides a kind of karst area
Suddenly：
Step 1: rig is carried out in place；
Step 2: naked brill first；
Step 3: one-level is with pipe construction；
Step 4: secondary naked brill.
Optionally, in step 1, total powerstation is by design requirement measure hole position coordinate, elevation first, and carries out numbering mark
Note；Then rig is in place according to the installation of design inclination angle, preliminary reinforcing is stable；Then with angel measuring instrument examine rig inclination angle and
Azimuth carry out simultaneously it is micro- whole, finally by rig fix spud in.
It is preferred that make numbering mark using red spray painting, to cause the numbering that marks more obvious.
Optionally, in step 1, the perforate hole position deviation of drilling is not more than l 0cm；
Bore entrance gradient and azimuth angle deviation cannot be greater than ± 3 °；
Hole deviation deviation on drilling length direction cannot be greater than 2%, and its hole deviation deviation cannot be greater than when having particular/special requirement
1%：
Effective hole depth must not owe deep, and ultra-deep is not more than 50cm, and whole hole aperture cannot be less than designing aperture 10mm；
Residue is no more than 10cm in hole when drilling reaches design hole depth.
Optionally, in step 2, naked brill, while first after drill bit are carried out using the drill bit more bigger than design aperture
Root drilling rod, using anti-shrinkage cavity centralizer drilling rod, anchor cable duct is modified, and smoothed out residual in anchor cable hole wall and tap
Slag.
This is in order to which follow-up bored with pipe reserves space, to carry out follow-up step, using special anti-shrinkage cavity righting
Device drilling rod, anchor cable duct can be modified, and smooth out residue in anchor cable hole wall and tap, ensure duct gradient and
Aperture meets design requirement.
Optionally, in step 2, during naked brill, the unfavorable geology easily passed through is run into, drilling rod need to be exited, using solid
Knot slip casting is handled unfavorable geology.
Optionally, the initial pressure control of slip casting is controlled in 3.5MPa in 0.4~0.5Mpa, termination pressure, treats that slurries are strong
Degree reach 75% and more than, carries out secondary cleaning bottom of hole with rig, then proceed to answer brill.
Slip casting uses single slurry：P.O42.5R level Portland cements, the ratio of mud=0.4:1~1:1.Single slurry slip casting
Occurs spillage running pulp phenomenon during if, using the double slurries of cement-silicate：Cement mortar uses the common silicic acid of P.O42.5R levels
Salt cement；Waterglass：Modulus m=2.4~3.4, Baume degrees Be=22~40 °；The volume ratio 1 of cement mortar and waterglass:0.5~
1:0.8；After dual slurry mixing, field test loses the pumpability time as 60.
Optionally, in step 3, one-level pipe-following drilling should be than designing aperture with core drill bit, bit diameter using three leaves
Greatly, and must be smaller than the naked drilled as holes aperture in step 1；The sleeve outer of pipe-following drilling should be greater than being equal to design aperture, sleeve pipe
Wall thickness 10-12mm；0.3~0.5m high wind aperture blowing deslagging is often crept into once to be cleaned in retaining hole；When often creeping into 2~3m, it should carry
Bore and check drill bit, impactor, casing drilling tool etc..
Sleeve pipe preferably uses the steel sleeve of the R780 models of high rigidity；Steel sleeve is using threaded connection.
Optionally, step 4 should be drilled into design anchoring section depth in the one-level of step 3 with pipe, and be defined as complete rock stratum
After change common drilling rod and continue naked drilling；With than designing the small model alloy bit in aperture, secondary naked brill is applied for secondary naked drilling
Work is untill design anchor cable hole depth is reached, or when running into adverse geological condition again, moves back bar more bit change again.
Optionally, in the naked brill work progress of the anchoring section of step 4, when running into adverse geological condition again, Ying Jin
OK,
Step 5：Two level is taken with pipe construction.
Optionally, in step 5, two level uses the three hinge gold ribbon sawtooth than designing the small model in aperture with pipe bit
Shape drill bit；Two level takes the sleeve pipe than one-level in step 3 with the small model of casing inner diameter of pipe construction with the sleeve outer of pipe,
And wall thickness is 6-8mm；It is slowly advanced in drilling process until complete rock, conventional bit is changed after complete rock is confirmed and continues naked brill；
Above step is repeated, until pore-forming, it is ensured that the integrality and anchoring depth of hole grouted part rock matter meet design requirement, drilling
After reaching projected depth, it is impossible to stop to bore immediately, it is desirable to surely bore 1~2 minute, prevent bottom hole sediment, do not reach design hole depth.
Sleeve pipe preferably uses the steel sleeve of the R780 models of high rigidity.
In the prior art, the geology such as solution cavity, fault belt, round gravel layer are passed through in anchor cable pore forming process easily to block
Bore, collapse hole and pore-forming efficiency it is slow, grown up anchor cable forming hole method using the karst area provided by the invention, with prior art phase
Than easily reinforcing knot slip casting using naked bore into hole section for small-sized solution cavity of leading portion in hole etc., it is ensured that hole quality；In in hole
There is the geology such as cavern, crushed zone and use pipe-following drilling in section, can accelerate pore-forming efficiency, save the duration, and avoid substantial amounts of
Slip casting, it is cost-saved；Crept into for anchoring section using normal drill bit, ensure that hole quality, it is ensured that anchorage cable anchoring power reaches
Design requirement.
Brief description of the drawings
, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art
The required accompanying drawing used is briefly described in embodiment or description of the prior art, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before creative work is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 be using karst area provided in an embodiment of the present invention grow up anchor cable forming hole method drilling bore hole schematic diagram.
Icon：The large-scale solution cavity of 1- anchoring sections, 2-, the small solution cavities of 3- and crack, 4- designs aperture, the naked brill reaming apertures of 5-, 6-
Anchoring section shrinkage cavity aperture.
Embodiment
Technical scheme is clearly and completely described below in conjunction with accompanying drawing, it is clear that described implementation
Example is part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill
The every other embodiment that personnel are obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
In the description of the invention, it is necessary to explanation, term " " center ", " on ", " under ", "left", "right", " vertical ",
The orientation or position relationship of the instruction such as " level ", " interior ", " outer " be based on orientation shown in the drawings or position relationship, merely to
Be easy to the description present invention and simplify description, rather than instruction or imply signified device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.In addition, term " first ", " second ",
" the 3rd " is only used for describing purpose, and it is not intended that instruction or hint relative importance.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
Karst area is grown up anchor cable forming hole method embodiment
Grown up anchor cable forming hole method as shown in figure 1, providing a kind of karst area in the present embodiment,
Karst area anchor cable forming hole method of growing up comprises the following steps：
Step 1: rig is carried out in place；Surveying and locating, rig installation, rig are reinforced, adjust rig inclination angle, spud in；
Step 2: naked brill first；The disposable geology such as reaming drilling, small solution cavity move back bar, consolidation slip casting, multiple brill；
Step 3: one-level is with pipe construction；Drilling meets the geology such as crushed zone, cavern, moves back bar, and more bit change strip pipe bores
Enter；
Step 4: secondary naked brill；Pipe-following drilling moves back bar, the secondary naked brill of more bit change to anchoring section 1 is designed.
In the prior art, the geology such as solution cavity, fault belt, round gravel layer are passed through in anchor cable pore forming process easily to block
Bore, collapse hole and pore-forming efficiency it is slow, grown up anchor cable forming hole method using the karst area provided by the invention, with prior art phase
Than easily reinforcing knot slip casting using naked bore into hole section for small-sized solution cavity of leading portion in hole etc., it is ensured that hole quality；In in hole
There is the geology such as cavern, crushed zone and use pipe-following drilling in section, can accelerate pore-forming efficiency, save the duration, and avoid substantial amounts of
Slip casting, it is cost-saved；Crept into for anchoring section 1 using normal drill bit, ensure that hole quality, it is ensured that anchorage cable anchoring power reaches
Design requirement.
Specifically, in anchor cable forming hole method of being grown up in the karst area that the present embodiment provides, specific implementation step is：
Step 1: rig is in place；
Total powerstation is by design requirement measure hole position coordinate, elevation first, and carries out numbering mark, it is preferred to use red spray
Paint, it is more eye-catching；
Then rig is in place according to the installation of design inclination angle, preliminary reinforcing is stable；Then rig is examined with angel measuring instrument
Inclination angle and azimuth carry out micro- whole simultaneously, finally fix rig and spud in.
In step 1,
(1) the perforate hole position deviation of drilling is not more than l 0cm；
(2) bore entrance gradient and azimuth angle deviation cannot be greater than ± 3 °；
(3) the hole deviation deviation on drilling length direction cannot be greater than 2%, and its hole deviation deviation must not be big when having particular/special requirement
In 1%：
(4) effectively hole depth must not owe deep, and ultra-deep is not more than 50cm, and whole hole aperture cannot be less than designing aperture 10mm；
(5) residue is no more than 10cm in hole when drilling reaches design hole depth.
Step 2: naked brill first；
In step 2, naked brill is carried out using the drill bit more bigger than design aperture 4, such as naked brill reaming aperture 5 in Fig. 1
Example.The alloy composite drill bit of the self-control research and development of the preferable Patent No. 201720646433.3 using online application carries out naked
Bore.
First drilling rod after drill bit simultaneously, using anti-shrinkage cavity centralizer drilling rod, the preferable patent for using online application
Number anchor cable duct is modified for the special anti-shrinkage cavity centralizer drilling rod of 201720646433.3 self-control research and development, and smoothes out anchor
Residue in Suo Kongbi and tap, the gradient and aperture for ensureing duct meet design requirement.
During naked brill, small-sized solution cavity is run into and unfavorable geology that the grade of crack 3 easily passes through, drilling rod need to be exited, using solid
Knot slip casting is handled unfavorable geology.
Slip casting uses single slurry：P.O42.5R level Portland cements, the ratio of mud=0.4:1~1:1.Single slurry slip casting
Occurs spillage running pulp phenomenon during if, using the double slurries of cement-silicate：Cement mortar uses the common silicic acid of P.O42.5R levels
Salt cement；Waterglass：Modulus m=2.4~3.4, Baume degrees Be=22~40 °；The volume ratio 1 of cement mortar and waterglass:0.5~
1:0.8；After dual slurry mixing, field test loses the pumpability time as 60.
The initial pressure control of slip casting is controlled in 3.5MPa in 0.4~0.5Mpa, termination pressure, treats that slurry intensity reaches
75% and more than, carry out secondary cleaning bottom of hole with rig, then proceed to multiple brill.
Step 3: one-level is with pipe construction；
The consolidation intractable geology of slip casting such as crushed zone, large-scale solution cavity 2 and sand gravel layer is met during the multiple brill of step 2
When, constructed using pipe-following drilling.
One-level pipe-following drilling should be bigger than design aperture 4 with core drill bit, bit diameter using three leaves, and must be than in step 1
Naked drilled as holes aperture it is small；The sleeve outer of pipe-following drilling should be greater than being equal to design aperture 4, casing wall thickness 10-12mm, and should adopt
With the steel sleeve of the R780 models of high rigidity；Steel sleeve is using threaded connection.
Often 0.3~0.5m of drilling answers high wind aperture blowing deslagging once, to be cleaned in retaining hole；When often creeping into 2~3m, brill should be carried
Check drill bit, impactor, casing drilling tool etc..
Step 4: secondary naked brill；
Step 4 should be drilled into the design depth of anchoring section 1 in the one-level of step 3 with pipe, and be changed after being defined as complete rock stratum
Common drilling rod continues naked drilling；Aperture 4 is designed because one-level is less than with pipe construction casing inner diameter, secondary naked drilling is with than designing hole
Anchoring section shrinkage cavity aperture 6 in the small model alloy bit in footpath 4, aperture such as Fig. 1 is illustrated, than designing the small model in aperture 4.It is secondary
It is naked bore construction until reaching design anchor cable hole depth untill, or when running into adverse geological condition again, move back bar again and change brill
Head.
In the naked brill work progress of the anchoring section 1 of step 4, when running into adverse geological condition again, it should carry out,
Step 5：Two level is taken with pipe construction.
When the naked brill of step 4 anchoring section 1 is constructed, when running into the unfavorable geologies such as solution cavity, crack again, two level is taken to be applied with pipe
Work processing.
Because one-level with pipe construction casing inner diameter be less than design aperture 4, therefore two level with pipe bit use than design aperture 4 it is small
The hinge gold ribbon sawtooth drill bit of one model three；
Two level also takes the sleeve pipe than one-level with the small model of casing inner diameter of pipe with the sleeve outer of pipe, and should use height
The steel sleeve of the R780 models of hardness, casing wall thickness 6-8mm of the two level with pipe.
It is slowly advanced in drilling process until complete rock, conventional bit is changed after complete rock is confirmed and continues naked brill；Repeat with
Upper step, until pore-forming, it is ensured that the integrality and the length of anchoring section 1 of the rock matter of hole grouted part 1 meet design requirement.
After drilling reaches projected depth, it is impossible to stop to bore immediately, it is desirable to surely bore 1~2 minute, prevent bottom hole sediment, do not reach
Design hole depth.
The present invention is easily sent out for passing through the geology such as solution cavity, fault belt, round gravel layer in anchor cable pore forming process of growing up
Raw bit freezing, phenomena such as collapse hole and pore-forming efficiency are slow, it have developed comprehensive anchor cable forming hole method：The easy pore-forming such as small-sized solution cavity of leading portion in hole
Section, naked bore is taken to combine consolidation injecting treatment, it is ensured that hole quality；In hole there is cavern, crushed zone, round gravel layer in stage casing
Handled etc. geology using pipe-following drilling, pore-forming efficiency can be accelerated, save the duration, and avoid substantial amounts of slip casting, greatlyd save
Cost；Anchoring section 1 is crept into using normal drill bit, ensure that hole quality, it is ensured that anchorage cable anchoring power reaches design requirement.
Finally it should be noted that：It is obvious to a person skilled in the art that the invention is not restricted to above-mentioned exemplary implementation
The details of example, and without departing from the spirit or essential characteristics of the present invention, can realize in other specific forms
The present invention.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary, and is nonrestrictive, this hair
Bright scope limits by appended claims rather than described above, it is intended that the equivalency fallen in claim is contained
All changes in justice and scope are included in the present invention.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped
Containing an independent technical scheme, this narrating mode of specification is only that those skilled in the art should for clarity
Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
It is appreciated that other embodiment.
Claims (10)
- The anchor cable forming hole method 1. a kind of karst area is grown up, it is characterised in that comprise the following steps：Step 1: rig is carried out in place；Step 2: naked brill first；Step 3: one-level is with pipe construction；Step 4: secondary naked brill.
- The anchor cable forming hole method 2. karst area according to claim 1 is grown up, it is characterised in that in step 1, first entirely Instrument of standing determines hole position coordinate, elevation by design requirement, and carries out numbering mark；Then rig is installed just according to design inclination angle Position, it is preliminary to reinforce stabilization；Then examine rig inclination angle and azimuth to carry out simultaneously with angel measuring instrument micro- whole, finally consolidate rig Surely spud in.
- The anchor cable forming hole method 3. karst area according to claim 2 is grown up, it is characterised in that in step 1, drilling Perforate hole position deviation be not more than l 0cm；Bore entrance gradient and azimuth angle deviation cannot be greater than ± 3 °；Hole deviation deviation on drilling length direction cannot be greater than 2%, and its hole deviation deviation cannot be greater than 1% when having particular/special requirement：Effective hole depth must not owe deep, and ultra-deep is not more than 50cm, and whole hole aperture cannot be less than designing aperture 10mm；Residue is no more than 10cm in hole when drilling reaches design hole depth.
- The anchor cable forming hole method 4. karst area according to claim 1 is grown up, it is characterised in that in step 2, use The drill bit more bigger than design aperture carries out naked brill, while first drilling rod after drill bit, right using anti-shrinkage cavity centralizer drilling rod Anchor cable duct is modified, and smoothes out residue in anchor cable hole wall and tap.
- The anchor cable forming hole method 5. karst area according to claim 4 is grown up, it is characterised in that in step 2, naked During brill, the unfavorable geology easily passed through is run into, drilling rod need to be exited, unfavorable geology is handled using consolidation slip casting.
- The anchor cable forming hole method 6. karst area according to claim 5 is grown up, it is characterised in that the initial pressure control of slip casting System in 0.4~0.5Mpa, termination pressure control in 3.5MPa, treat slurry intensity reach 75% and more than, carried out with rig secondary Cleaning bottom of hole, then proceed to multiple brill.
- The anchor cable forming hole method 7. karst area according to claim 6 is grown up, it is characterised in that in step 3, one-level Pipe-following drilling should be bigger than design aperture with core drill bit, bit diameter using three leaves, and must be than the naked drilled as holes hole in step 1 Footpath is small；The sleeve outer of pipe-following drilling should be greater than being equal to design aperture, casing wall thickness 10-12mm；Often creep into 0.3~0.5m high wind Aperture blowing deslagging is once.
- The anchor cable forming hole method 8. karst area according to claim 1 is grown up, it is characterised in that step 4 should be in step 3 One-level be drilled into design anchoring section depth with pipe, and be defined as changing behind complete rock stratum common drilling rod and continue naked to bore drilling；It is secondary With than designing the small model alloy bit in aperture, secondary naked bore is constructed untill design anchor cable hole depth is reached for naked drilling, or When person runs into adverse geological condition again, bar more bit change is moved back again.
- The anchor cable forming hole method 9. karst area according to claim 8 is grown up, it is characterised in that in the anchoring section of step 4 Naked brill work progress in, when running into adverse geological condition again, should carry out,Step 5：Two level is taken with pipe construction.
- The anchor cable forming hole method 10. karst area according to claim 9 is grown up, it is characterised in that in step 5, two level The three hinge gold ribbon sawtooth drill bits than designing the small model in aperture are used with pipe bit；Two level takes ratio with the sleeve outer of pipe One-level is with the sleeve pipe of the small model of casing inner diameter of pipe construction in step 3, and wall thickness is 6-8mm；It is slowly advanced in drilling process Until complete rock, conventional bit is changed after complete rock is confirmed and continues naked brill；Above step is repeated, until pore-forming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710859189.3A CN107503681A (en) | 2017-09-21 | 2017-09-21 | Karst area is grown up anchor cable forming hole method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710859189.3A CN107503681A (en) | 2017-09-21 | 2017-09-21 | Karst area is grown up anchor cable forming hole method |
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| CN107503681A true CN107503681A (en) | 2017-12-22 |
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| CN201710859189.3A Pending CN107503681A (en) | 2017-09-21 | 2017-09-21 | Karst area is grown up anchor cable forming hole method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108677966A (en) * | 2018-05-28 | 2018-10-19 | 郑林 | A kind of layer of sand air-blowing forming hole method |
| CN109057712A (en) * | 2018-07-12 | 2018-12-21 | 中国葛洲坝集团股份有限公司 | Anchor cable pore-creating twin-stage casing construction method |
| CN109667542A (en) * | 2018-12-28 | 2019-04-23 | 杭州昂创科技有限公司 | The discontinuous pipe-following drilling anchor cable construction method of multistage subsection in broken formation |
| CN110851953A (en) * | 2019-09-30 | 2020-02-28 | 中铁十二局集团有限公司 | Method, system and medium for calculating anchoring force of long anchor cable penetrating through non-filled karst cave |
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| CN114808923A (en) * | 2022-04-19 | 2022-07-29 | 中铁建工集团有限公司 | Cave grouting construction processing method |
| CN114961555A (en) * | 2022-06-09 | 2022-08-30 | 广西川昆新能源科技有限公司 | Well drilling construction method |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108677966A (en) * | 2018-05-28 | 2018-10-19 | 郑林 | A kind of layer of sand air-blowing forming hole method |
| CN109057712A (en) * | 2018-07-12 | 2018-12-21 | 中国葛洲坝集团股份有限公司 | Anchor cable pore-creating twin-stage casing construction method |
| CN109667542A (en) * | 2018-12-28 | 2019-04-23 | 杭州昂创科技有限公司 | The discontinuous pipe-following drilling anchor cable construction method of multistage subsection in broken formation |
| CN109667542B (en) * | 2018-12-28 | 2020-06-05 | 至永建设集团有限公司 | Construction method for drilling anchor cable by multistage segmental discontinuous pipe following in broken stratum |
| CN110851953A (en) * | 2019-09-30 | 2020-02-28 | 中铁十二局集团有限公司 | Method, system and medium for calculating anchoring force of long anchor cable penetrating through non-filled karst cave |
| CN110851953B (en) * | 2019-09-30 | 2023-05-26 | 中铁十二局集团有限公司 | Calculation method, system and medium for anchoring force of long anchor cable penetrating through filling-free karst cave |
| CN111156041A (en) * | 2020-02-25 | 2020-05-15 | 山东科技大学 | Method for installing anchor cable through loosening and drilling |
| CN112196461A (en) * | 2020-09-23 | 2021-01-08 | 贵州建工集团第一建筑工程有限责任公司 | Side slope damping drilling method |
| CN114808923A (en) * | 2022-04-19 | 2022-07-29 | 中铁建工集团有限公司 | Cave grouting construction processing method |
| CN114808923B (en) * | 2022-04-19 | 2023-08-11 | 中铁建工集团有限公司 | Cave grouting construction treatment method |
| CN114961555A (en) * | 2022-06-09 | 2022-08-30 | 广西川昆新能源科技有限公司 | Well drilling construction method |
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