CN101619655A - Drilling method for accurately controlling hole deflection under complicated stratum and guide device - Google Patents
Drilling method for accurately controlling hole deflection under complicated stratum and guide device Download PDFInfo
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- CN101619655A CN101619655A CN200910062686A CN200910062686A CN101619655A CN 101619655 A CN101619655 A CN 101619655A CN 200910062686 A CN200910062686 A CN 200910062686A CN 200910062686 A CN200910062686 A CN 200910062686A CN 101619655 A CN101619655 A CN 101619655A
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Abstract
The invention discloses a drilling method for accurately controlling a hole deflection under complicated stratums and a guide device. Under complicated stratums containing large stones, boulder stones and crack and faultage growths, the deflection of a drilling hole is overcomed by adopting methods of mounting the guide device, strictly controlling a drilling process, carrying out grouting in complicated cracked stratums, and the like under the condition of accurately controlling the drilling hole in a long distance, and the gradient can be controlled within a range of 1 percent, thereby effectively solving the problems of drilling hole deflections caused by long drilling hole channel, large difference of rock rigidity, flexure and deformation generated by impact, torque force and self gravity of a drilling rod, and the like. The invention has simple operation, waste hole reduction, cost reduction, good construction effect and smooth hole wall and is beneficial to subsequent working procedures.
Description
Technical field
The present invention relates to a boring method, particularly a kind of bad ground is accurately controlled the boring method and the guide device of hole deviation down.
Background technology
For satisfying the needs of engineering, some boring, for example: the probing prospecting hole of the concrete cut of thin wall construction, high accuracy are to wearing formula prestress anchorage cable hole etc., the required precision in these holes is very high, wherein hole deviation requires less than 1%, if do not take measures or improper measures in the boring procedure, the easy deflection of holing becomes useless hole.Especially under the bad ground condition, carry the easier deflection that causes of boring that boulder, boulder, crack tomography are brokenly grown, lithology soft or hard difference is big secretly, add some boring duct very long (tens meters even hundreds of rice), drilling rod, drilling tool are owing to impact, torsion, gravity (self gravitation also can produce the drilling rod distortion when low-angle dip or horizontal drilling) influence produce deflection deformation down and cause hole scattering, in the case, take which kind of effective measures, overcome hole scattering, satisfying high-precision requirement is a primary difficult problem that faces in the boring procedure.
Summary of the invention
Technical problem to be solved by this invention provides boring method and the guide device of accurately controlling hole deviation under a kind of bad ground, complicated broken formation can met, long distance accurately under the keyhole, overcomes hole scattering, and easy and simple to handle, cost is low, effective.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of bad ground is accurately controlled the boring method of hole deviation down, may further comprise the steps:
Creep into axis and design direction dead in line when 1) facility are installed, bit central overlaps with the site, hole, and support connects firmly with the basis.
2) during perforate, first low velocity impact creeps into, and after waiting to creep into 1.0～1.5m, repetition measurement boring parameters meets the requirements and then continues to creep into, otherwise rectifies a deviation;
3) in the drilling process, need to shut down every 5 meters and to carry out hole deviation with inclinometer and measure, grasp drilling trace in real time, the hole deviation rate is carried out drilling tool, guide device spacing if surpass permissible value, drilling speed the pressure of the drill adjustment;
4) regulate the pressure of the drill at any time according to rate of penetration, at the uniform velocity creep into, cleaning in the retaining hole;
5) guide device is installed on drilling rod;
6) complicated broken formation carries out grouting treatment;
Can under bad ground, obtain to grow distance through above step, and slope 1% with interior accurate duct.
Described a kind of bad ground is accurately controlled the boring method of hole deviation down, and per 4 meters-6 meter amperes are equipped with a guide device on drilling rod.
When boring must be passed bad grounds such as containing boulder, boulder, crack mature fault, take pressure limiting, limited grouting Gu Bi, grouting pressure is controlled at 0.2～1Mpa, with sending the slurry pipe with W/C=0.4: 1 slurries are limited the quantity of and are transported to zone of fracture, make the filling gluing in limited range of hole wall fragmented rock body, boulder, boulder, crack, form and stablize hole wall and under the effect of slurries calking gluing, improve formation strength, and then creep into.
Pilot is movably arranged on outside the drilling rod, and pilot is provided with many correcting bars outward.
Described many correcting bars are by circumferential arrangement.
Described many correcting bars are by axially-aligned.
Be staggered between the many correcting bars of axially-aligned.
A kind of bad ground provided by the invention is accurately controlled the boring method and the guide device of hole deviation down, when containing bad grounds such as boulder, boulder, crack mature fault, the installation requirement strictness of facility, thus borehole accuracy guaranteed, be convenient to the expansion of bottom operation.Adopt low speed to creep into when spudding in, the machining accuracy in hole is higher like this, and this section just can become the basis of follow-up processing.Average per 5 meters are carried out one-shot measurement, have guaranteed the precision in hole, thereby can adjust at any time, also are convenient to the installation of guide device because drilling tool weight is light more, drilling rod rigidity is big more, guider be provided with more little at interval, low more its hole deviation rate of drilling speed the pressure of the drill is more little.At the uniform velocity creep into and can avoid drilling speed to change the inclination that causes boring, cleaning can avoid talus deposit to cause hole scattering in the retaining hole.
The special guide device of the outer installation of drilling rod, the outer correcting bar multiple spot of guide device evenly contacts with hole wall, has guaranteed the radial accuracy of pilot, and pilot is helped drilling rod within it, thereby avoided inclination, the torsional deformation of drilling rod, more remarkable at gentle incline, horizontal operation effectiveness.
Take pressure limiting, limited grouting, and water/binder ratio is W/C=0.4: 1, and regulate the pressure that is in the milk, thereby guarantee that mortar evenly distributes at zone of fracture, improve formation drilling intensity, avoid making machining hole produce deflection because of the stratum soft or hard is uneven, can not waste too many mortar again, save cost.
Carry out methods such as grouting treatment by taking to install guide device, strict keyhole process, complicated broken formation, accurately under the keyhole, overcome hole scattering in long distance, slope can be controlled in 1% scope.Solved effectively that boring duct long (tens meters even hundreds of rice), lithology soft or hard difference are big, drill rod boring tool is because impact, torsion and self gravitation (the drilling rod distortion that low-angle dip or horizontal drilling self gravitation produce more very) produce the difficult problem of the hole scattering that deflection deformation etc. causes.
The present invention is easy and simple to handle, has reduced the generation in useless hole, and it is good to have reduced cost and construction effect, and hole wall is smooth, helps the operation of follow-up operation.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is the embodiment of the present invention structural representation;
Fig. 2 is a guide device structural representation of the present invention;
Fig. 3 is a guide device B-B sectional view of the present invention.
The specific embodiment
As Fig. 1, Fig. 2, shown in Figure 3, a kind of bad ground is accurately controlled the boring method of hole deviation down, may further comprise the steps:
Creep into axis and design direction dead in line when 1) facility are installed, bit central overlaps with the site, hole, and support connects firmly with the basis.
2) during perforate, first low velocity impact creeps into, and after waiting to creep into 1.0～1.5m, repetition measurement boring parameters meets the requirements and then continues to creep into, otherwise rectifies a deviation;
3) in the drilling process, need to shut down every 5 meters and to carry out hole deviation with inclinometer and measure, grasp drilling trace in real time, the hole deviation rate is carried out drilling tool, guide device spacing if surpass permissible value, drilling speed the pressure of the drill adjustment;
4) regulate the pressure of the drill at any time according to rate of penetration, at the uniform velocity creep into, cleaning in the retaining hole;
5) guide device 12 is installed on drilling rod;
6) complicated broken formation carries out grouting treatment;
Can under bad ground, obtain to grow distance through above step, and slope 1% with interior accurate duct.
Described a kind of bad ground is accurately controlled the boring method of hole deviation down, and per 4 meters-6 meter amperes are equipped with a guide device 12 on drilling rod.
When boring must be passed bad grounds such as containing boulder, boulder, crack mature fault, take pressure limiting, limited grouting Gu Bi, grouting pressure is controlled at 0.2～1Mpa, with sending the slurry pipe with W/C=0.4: 1 slurries are limited the quantity of and are transported to zone of fracture, make the filling gluing in limited range of hole wall fragmented rock body, boulder, boulder, crack, form and stablize hole wall and under the effect of slurries calking gluing, improve formation strength, and then creep into.
Described many correcting bars 14 are by circumferential arrangement.
Described many correcting bars 14 are by axially-aligned.
Be staggered between the many correcting bars 14 of axially-aligned.
Embodiment:
As shown in Figure 1, at Qingjian River Shui Buya multi-purpose project 50m to wearing in the formula construction prestressed cable, boring must be passed the bad grounds such as tomography 5 that contain boulder, boulder 6, cranny development from source gallery 1 and be arrived target gallery 2, carries out wearing the formula construction prestressed cable after boring is finished.Boring requirement hole deviation rate must be controlled within 1%, otherwise becomes useless hole.Be to satisfy the high-precision requirement of long distance boring, must solve a series of difficult problems such as hole scattering that hole scattering that bad ground lithology soft or hard difference such as containing boulder, boulder, crack mature fault causes and drill rod boring tool cause owing to impact, torsion and self gravitation generation deflection deformation etc.
For realizing the purpose of high-precision borehole, processing scheme is made up of following three steps:
1, strict keyhole process
Creep into axis and design direction dead in line when 1) facility are installed, impactor 9 and drill bit 8 centers overlap with the site, hole, and support connects firmly with the basis, is shaken non-migration;
2) during perforate, first low velocity impact creeps into, and after waiting to creep into 1.0～1.5m, repetition measurement boring parameters meets the requirements and then continues to creep into, otherwise rectifies a deviation.
3) in the drilling process, need to shut down every 5 meters and to carry out hole deviation with inclinometer and measure, grasp drilling trace in real time, the hole deviation rate need be carried out drilling tool, guide device 12 spacings if surpass permissible value, drilling speed the pressure of the drill adjustment; Drilling tool weight is light more, drilling rod rigidity is big more, guide device be provided with at interval more little, low more its hole deviation rate of drilling speed the pressure of the drill is more little.
4) regulate the pressure of the drill at any time according to rate of penetration, make every effort at the uniform velocity creep into, keep having finished cleaning in boring section 11 holes, avoid talus deposit to cause hole scattering.
2, improve drilling tool and make it to have the correcting function
As shown in Figure 2, for correcting drill rod boring tool owing to impact, torsion, gravity produce the hole scattering that deflection deformation causes, per 4 meters-6 meters add a guide device 12 on drilling rod.Gapped between the pilot 13 of drilling rod and guide device 12, the pilot 13 outer multilayer correcting bars 14 that are provided with, every layer equidistantly is provided with 6 correcting bars 14 by circumference, be crisscross arranged between every layer of correcting bar 14, thereby guaranteed that correcting bar multiple spot evenly contacts with hole wall, guaranteed the radial accuracy of pilot 13, pilot is helped drilling rod 10 within it, thereby avoided inclination, the torsional deformation of drilling rod 10, effect is remarkable in the horizontal operation of this example.
3, complicated broken formation carries out grouting treatment
When boring must be passed bad grounds such as containing boulder, boulder, crack mature fault, take pressure limiting, limited grouting Gu Bi: (grouting pressure generally is controlled at 0.2～1Mpa under certain pressure, according to on-site actual situations and suction slurry amount size adjustment), is W/C=0.4 with sending the slurry pipe with water/binder ratio: 1 slurries are limited the quantity of and are transported to zone of fracture, make the filling gluing in limited range of hole wall fragmented rock body, boulder, boulder, crack, form consolidation grouting section 4, stablize hole wall and under the effect of slurries calking gluing, improve formation strength.And then creep into, longer as the weak broken band that need pass, one section of cement-grouting consolidation creeps into one section, and circulation is carried out, and the consolidation grouting boring section 7 of formation can effectively overcome hole scattering.
Adopt method of the present invention can satisfy engineering construction quality and schedule requirement, cost is low, effective.
Claims (7)
1, a kind of bad ground is accurately controlled the boring method of hole deviation down, it is characterized in that may further comprise the steps:
Creep into axis and design direction dead in line when 1) facility are installed, bit central overlaps with the site, hole, and support connects firmly with the basis.
2) during perforate, first low velocity impact creeps into, and after waiting to creep into 1.0～1.5m, repetition measurement boring parameters meets the requirements and then continues to creep into, otherwise rectifies a deviation;
3) in the drilling process, need to shut down every 5 meters and to carry out hole deviation with inclinometer and measure, grasp drilling trace in real time, the hole deviation rate is carried out drilling tool, guide device spacing if surpass permissible value, drilling speed the pressure of the drill adjustment;
4) regulate the pressure of the drill at any time according to rate of penetration, at the uniform velocity creep into, cleaning in the retaining hole;
5) guide device (12) is installed on drilling rod;
6) complicated broken formation carries out grouting treatment;
Can under bad ground, obtain to grow distance through above step, and slope 1% with interior accurate duct.
2, a kind of bad ground according to claim 1 is accurately controlled the boring method of hole deviation down, and it is characterized in that: per 4 meters-6 meter amperes are equipped with a guide device (12) on drilling rod.
3, a kind of bad ground according to claim 1 is accurately controlled the boring method of hole deviation down, boring it is characterized in that: when must be passed the bad grounds such as tomography 5 that contain boulder, boulder (6), cranny development, take pressure limiting, limited grouting Gu Bi, grouting pressure is controlled at 0.2～1Mpa, with sending the slurry pipe with W/C=0.4: 1 slurries are limited the quantity of and are transported to zone of fracture, make the filling gluing in limited range of hole wall fragmented rock body, boulder, boulder, crack, form and stablize hole wall and under the effect of slurries calking gluing, improve formation strength, and then creep into.
4, a kind of bad ground is accurately controlled the guide device of hole deviation down, and it is characterized in that: pilot (13) is movably arranged on outside the drilling rod (10), the outer many correcting bars (14) that are provided with of pilot (13).
5, a kind of bad ground according to claim 5 is accurately controlled the guide device of hole deviation down, it is characterized in that: described many correcting bars (14) are by circumferential arrangement.
6, according to the guide device of claim 5 or the accurate down control hole deviation of 6 described a kind of bad grounds, it is characterized in that: described many correcting bars (14) are by axially-aligned.
7, a kind of bad ground according to claim 7 is accurately controlled the guide device of hole deviation down, it is characterized in that: be staggered between the many correcting bars (14) of axially-aligned.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102704909A (en) * | 2012-06-28 | 2012-10-03 | 中国水利水电第七工程局成都水电建设工程有限公司 | Hole-deflection control construction method for deep hole drilling |
| CN103352687A (en) * | 2013-07-12 | 2013-10-16 | 葛洲坝集团第二工程有限公司 | Method controlling hole deviation in hole drilling |
| CN109306850A (en) * | 2018-09-27 | 2019-02-05 | 北京航天地基工程有限责任公司 | Creep into method for correcting error in uneven mutually bed boundary |
| CN113756788A (en) * | 2021-10-18 | 2021-12-07 | 中国地质大学（北京） | Mechanical type is along with boring well deviation measuring apparatu |
| CN115270345A (en) * | 2022-08-04 | 2022-11-01 | 中国地质调查局长沙自然资源综合调查中心 | Computing method based on continuous beam rope coring anti-deviation drilling tool mechanical model |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2697302Y (en) * | 2004-04-02 | 2005-05-04 | 新疆石油管理局钻井公司钻井工具技术服务公司 | Rotary protector for pipe tool |
| CN2763471Y (en) * | 2004-11-26 | 2006-03-08 | 大港油田集团有限责任公司 | Centrilizer for logging weighing |
| CN200964804Y (en) * | 2006-03-27 | 2007-10-24 | 李凤咏 | Rolling body centralizer |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102704909A (en) * | 2012-06-28 | 2012-10-03 | 中国水利水电第七工程局成都水电建设工程有限公司 | Hole-deflection control construction method for deep hole drilling |
| CN102704909B (en) * | 2012-06-28 | 2015-03-11 | 中国水利水电第七工程局成都水电建设工程有限公司 | Hole-deflection control construction method for deep hole drilling |
| CN103352687A (en) * | 2013-07-12 | 2013-10-16 | 葛洲坝集团第二工程有限公司 | Method controlling hole deviation in hole drilling |
| CN103352687B (en) * | 2013-07-12 | 2016-06-29 | 中国葛洲坝集团第二工程有限公司 | The method of keyhole hole deviation |
| CN109306850A (en) * | 2018-09-27 | 2019-02-05 | 北京航天地基工程有限责任公司 | Creep into method for correcting error in uneven mutually bed boundary |
| CN113756788A (en) * | 2021-10-18 | 2021-12-07 | 中国地质大学（北京） | Mechanical type is along with boring well deviation measuring apparatu |
| CN115270345A (en) * | 2022-08-04 | 2022-11-01 | 中国地质调查局长沙自然资源综合调查中心 | Computing method based on continuous beam rope coring anti-deviation drilling tool mechanical model |
| CN115270345B (en) * | 2022-08-04 | 2023-08-25 | 中国地质调查局长沙自然资源综合调查中心 | Calculation method based on continuous Liang Shengsuo coring anti-skew drilling tool mechanical model |
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| CN101619655B (en) | 2012-08-15 |
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