CN109056709A - A method of using full-sleeve hydraulic drill rig construction In Karst Areas For Bridge pile foundation - Google Patents
A method of using full-sleeve hydraulic drill rig construction In Karst Areas For Bridge pile foundation Download PDFInfo
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- CN109056709A CN109056709A CN201810961681.6A CN201810961681A CN109056709A CN 109056709 A CN109056709 A CN 109056709A CN 201810961681 A CN201810961681 A CN 201810961681A CN 109056709 A CN109056709 A CN 109056709A
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- 238000010276 construction Methods 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000005553 drilling Methods 0.000 claims abstract description 59
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 39
- 239000010959 steel Substances 0.000 claims abstract description 39
- 230000002787 reinforcement Effects 0.000 claims abstract description 7
- 238000013461 design Methods 0.000 claims abstract description 4
- 239000002689 soil Substances 0.000 claims description 16
- 239000004576 sand Substances 0.000 claims description 14
- 239000011435 rock Substances 0.000 claims description 6
- 230000010412 perfusion Effects 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 description 8
- 238000004140 cleaning Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000035515 penetration Effects 0.000 description 3
- 239000013049 sediment Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 244000145845 chattering Species 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 229910000617 Mangalloy Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000012954 risk control Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
-
- 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
- E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- General Engineering & Computer Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Earth Drilling (AREA)
Abstract
The present invention provides a kind of methods using full-sleeve hydraulic drill rig construction In Karst Areas For Bridge pile foundation, comprising the following steps: (1) measure of pile position setting-out；(2) drilling machine and steel sleeve are in place；(3) driving drilling machine carries out drilling construction until hole depth reaches predetermined design depth；(4) steel reinforcement cage is installed；(5) concreting；(6) casing is extracted.Method provided by the invention using full-sleeve hydraulic drill rig construction In Karst Areas For Bridge pile foundation, suitable for the Special Geological Conditions pile foundation construction such as karst, not only the safety and stablization of the infrastructure such as Adjacent Buildings and construction equipment ensure that, but also shortened construction period.
Description
Technical field
The present invention relates to a kind of methods using full-sleeve hydraulic drill rig construction In Karst Areas For Bridge pile foundation, belong to bridge and apply
Work technical field.
Background technique
In the bridge engineering construction of city prosperity block, to complete construction task in effective construction period, reduce because
Construction equipment noise caused by urban life crowd, environmental pollution, ensure around existing infrastructure, building and
The safety and stablization of crowd are the key that risk controls.It is such as thicker especially when Bored Pile Foundation of Bridge is in special geology
Water-rich sand layer, bedrock surface big rise and fall, lithosphere is harder and there are oblique rocks, and karsts developing area is strong, lapies fluid bowl is developed, covered
Soil cave development in blinding layer, the solution cavity that solution cavity is very big, buried depth relatively deeply, in beading development, to be not filled by, is partly filled, will protect
The safety and stability for demonstrate,proving Bridge Pile Foundation Construction safety and Adjacent Buildings is a significant technology issues.
Summary of the invention
Based on the above deficiency, the technical problem to be solved in the present invention is to provide a kind of application full-sleeve hydraulic drill rig construction rocks
The method of molten area bridge pile foundation, is suitable for the Special Geological Conditions pile foundation constructions such as karst, both ensure that Adjacent Buildings etc.
The safety and stablization of infrastructure and construction equipment, and shorten construction period.
In order to solve the above technical problems, the invention adopts the following technical scheme:
A method of using full-sleeve hydraulic drill rig construction In Karst Areas For Bridge pile foundation, comprising the following steps:
(1) measure of pile position setting-out；
(2) drilling machine and steel sleeve are in place；
(3) driving drilling machine carries out drilling construction until hole depth reaches predetermined design depth；
(4) steel reinforcement cage is installed；
(5) concreting；
(6) casing is extracted.
The step (1) specifically includes the following steps:
(11) stake bit plane coordinate data is inputted into total station；
(12) using total station survey setting positioning pile foundation central point；
(13) pile foundation central point is marked using steel nail；
(14) the drilling contour line with stake diameter with size is done centered on central point.
Further include the steps that the verticality for adjusting casing within 1 ‰ in the step (2).
The step (2) the following steps are included:
(21) cutter head section is assembled with standard knot on ground；
(22) assembled cutter head section steel sleeve is lifted by crane, cutter head downwards, is put into drilling machine revolution driving ring；
(23) the hydraulic cohesion device for starting drilling machine, is fixed between the wedge block and steel sleeve of hydraulic cohesion device.
In the step (3), casing is in underground layer or layer of sand stage, and casing is using self weight indentation, and revolution is fast at this time
Degree is adjusted to top gear or mid ranger, pressure 0KN, rotary torque 650-1550KNm；Casing enters general soil layer or hard
During soil layer, rotational speed is set as middling speed or low speed, pressure control in 500~1500KN, rotary torque control 650~
1550KN·m；Casing enter in weathering, micro- weathered rock formation when, rotational speed is set as low or first gear, pressure control 1500~
2500KN, rotary torque are controlled in 1550~2000KNm.According to the variation of geologic lithology, select reasonable drilling pressure and
Rate of penetration drills through different geological structure layers, prevents from causing drilling machine chattering, influences the verticality of pile foundation, ensure that into
Hole efficiency；
The step (3) further includes the steps that taking out the dregs in casing by grab bucket in boring procedure.
Dregs is cleared out when creeping into sand seam geology, in hole carries out after the drill-through layer of sand of full-sleeve.The operation of out break hole is avoided, is protected
Card drilling do not occur reaming, hole problem of collapsing.
It is poured in the step (5) using tremie method.
Keep the conduit of concrete perfusion always in pile foundation center position area, offset controls within 100mm, control
The buried depth amount of conduit controls full-sleeve buried depth amount in 4~6m in 2~6m.During pile foundation filling concrete, strict control is led
The height of pipe, full-sleeve Transducers Embedded in Concrete, can prevent occur pulling out trustship phenomenon, guarantee that filling concrete is once completed.
In the step (6), in solution cavity region, full-sleeve removes placket inner concrete face absolute altitude and is higher than sleeve bottom
Absolute altitude.It avoids because solution cavity fills leakiness, concrete surface declines under pressure, leads to showing in mud sleeve pipe
As causing the generation of broken pile and other issues.
Using above technical scheme, the present invention achieves following technical effect:
(1) method provided by the invention using full-sleeve hydraulic drill rig construction In Karst Areas For Bridge pile foundation, utilizes a full set
Pipe carries out drilling pile wall, the hole that solves that karsts developing area geology condition karst cave treatment is difficult, collapsing occurs in water-rich sand layer geology, expanding
Technical problem；The security risks such as occur collapsing when avoiding shallow-layer soil cave geotechnical boring pile driving construction, ensure that Adjacent Buildings etc.
The safety and stablization of infrastructure and construction equipment；It ensure that drilled pile construction quality, improve drilled pile pore-forming efficiency,
Construction speed is accelerated, capital investment has been saved.
Detailed description of the invention
The step of Fig. 1 is method of the present invention using full-sleeve hydraulic drill rig construction In Karst Areas For Bridge pile foundation is schemed.
Specific embodiment
As shown in Figure 1, the present invention provides a kind of sides using full-sleeve hydraulic drill rig construction In Karst Areas For Bridge pile foundation
Method, it is characterised in that: the following steps are included:
(1) measure of pile position setting-out；Specifically includes the following steps:
(11) stake bit plane coordinate data is inputted into total station；
(12) setting position pile foundation central point is surveyed using total station；
(13) pile foundation central point is marked using steel nail；
(14) the drilling contour line with stake diameter with size is done centered on central point；Contour line drill convenient for full-sleeve alignment
Stake position saves stake machine and is directed at the time in place.
(2) drilling machine and steel sleeve are in place；
The fashioned iron backing plate of drilling machine is laid on centered on pile foundation on surrounding ground by 100T crawler crane in intersecting parallels first；
Drilling machine is lifted in place on backing plate after leveling, the center line of pile foundation is checked and approved in contraposition, and deviation should be not more than 30mm.After drilling machine is in place
The balancing device of drilling machine side is landed, the end of balancing device prevent against fixing because of set using the crawler belt of crawler crane
Pipe torsional moment causes drilling machine itself to rotate backward, and prevents the security risk that drilling machine rotation generates.
Then, casing installation is carried out, assembles cutter head section and the standard knot of a 6m long on ground；Then using shoe
Band slings assembled cutter head section steel sleeve, and cutter head downwards, is slowly put into drilling machine revolution driving ring；It is hydraulic to start drilling machine
Cohesion device, the frictional force using contact surface between wedge block and steel sleeve will be fixed between wedge block and steel sleeve, real
Effective transmitting of torque between existing drilling machine revolution driving ring and steel sleeve.The holding and release of clamping structure and steel sleeve, by pressing from both sides
Wedge block on locking oil cylinder and revolution driving ring is adjusted, and when clamping cylinder oscilaltion, wedge block is also gone up and down therewith, effectively
Gyroscopic drive system is mutually engaged with steel sleeve as overall structure, guarantees that steel sleeve is not fallen out, and provide driving force.Drilling machine folder
The fast curvature of tight device wedge shape is consistent with the curvature of steel sleeve, guarantees the wedge shape contact area between steel sleeve fastly, is
Steel sleeve transmits torque and provides reliable guarantee.Behind edge of a knife align piles position, hanging down for steel sleeve is adjusted using the vertical hydraulic cylinder of drilling machine
Straight degree, the degree control of casing is within 1 ‰.
(3) driving drilling machine carries out drilling construction until hole depth reaches predetermined design depth；
Start hydraulic drill rig, hydraulic motor driving steel sleeve is rotated, and the cutter head of steel bushing tube end and soil are generated
Cutting, pile foundation core soil is separated with stake week foundation soil, is pressed into rotation, is achieved the purpose that drilling.Velocity of rotation base area
Matter situation is divided into three gears, respectively top gear 0.9rpm, mid ranger 1.5rpm, bottom gear 2.5rpm.
Vertical hydraulic system does not apply pressure when initial, is used as pressure by casing self weight, when penetration rate slows down, starting
Vertical hydraulic system pressurization, realizes normal construction.It is also changed correspondingly according to pressure under the variation of geologic lithology, provides and fill for drilling machine
The power of foot, drills through different geological structure layers, ensure that pore-forming efficiency.Specifically: casing enters soil layer or layer of sand stage, set
Pipe is using self weight indentation, and rotational speed is adjusted to top gear or mid ranger, pressure 0KN, rotary torque 650- at this time
1550KN·m.Casing enters during general soil layer or hard soil layer, and rotational speed is set as middling speed or low speed, pressure control
In 500~1500KN, rotary torque is controlled in 650~1550KNm.When casing tripping in middle weathering, micro- weathered rock formation, Ying Jiang
Rotational speed is set as low or first gear, and pressure should be controlled according to rock stratum situation in 1500~2500KN at this time, and rotary torque control exists
Between 1550~2000KNm, rotary torque maximum is no more than 2000KNm under normal circumstances.Select reasonable drilling pressure
And rate of penetration, it prevents from causing drilling machine chattering, influences the verticality of pile foundation.
While drilling, the dregs in casing is taken out using crawler crane lifting machine formula Impact Bucket Grab.Grab bucket takes soil
End is made of two panels with the arc-shaped steel plate of blade, and pulley blocks are arranged inside circle grab bucket body, is connected pulley by wirerope, is grabbed
Bucket and hanging ring, grab bucket are completed to open and close with the variation of the lifting of wirerope.Dregs, which clears out, when creeping into sand seam geology, in hole wants
Carried out after the drill-through layer of sand of full-sleeve, avoid the operation of out break hole, guarantee drilling do not occur reaming, hole problem of collapsing.
When head section cannula tip is higher by drilling machine job platform 1m high, need to connect the second section casing.Connection side between casing
Formula is mechanically connected using spigot-and-socket, and it is 400mm that bell and spigot, which connects width, with a thickness of 25mm, along the circumferential direction constant spacing position
Setting connection hole and limiting slot, socket tube wall is interior to be arranged screw thread, and bolt connects from outside bellmouth circumferential direction socket rotational fastener
It connects.Limiting slot can be improved the precision and installation exercise efficiency of installation, is effectively ensured between casing and is connected close.Casing is carried out
After socket joint abutting joint, link bolt hole position is to just, installation connection bolt, after bolt is all installed, then is applied with spanner
Add torque screwing bolts, by casing connection close and firm, with this reciprocal connection steel sleeve.Full-sleeve cutter head section length is 1.5m,
Standard knot length is divided into 3m, 6m, and casing material is made using manganese steel.Cutter head section uses 50mm thick steel plate；The body of standard knot
Portion uses 25mm thick steel plate；The connecting pin 0.53m long range of casing uses 50mm thick steel plate.Casing string passes through machine by more casings
The connection of tool screwed joint, concatenates by root to designing pile length according to the depth of drilling.Improve the technique item of drilled pile construction retaining wall
Part ensure that the construction quality of pile foundation engineering.Tool bit part is made of the cutter tooth of three kinds of plate tooth, weldering tooth, butterfly tooth models.Plate tooth
It is mounted on cannula tip with butterfly tooth, main function is to complete friction drilling construction operation；Weldering tooth is welded on internal surface of sleeve pipe or outer
On wall, mainly completion tube wall expands ruler operation, reduces the frictional force between casing and soil, guarantees drilling machine power.
When drilling machine lower part, earth's surface is locally settled, and drilling machine should stop constructing, and is supported using full-sleeve and is risen drilling machine,
Withdraw from drilling machine backing plate at bottom, by sand in the use of depression position backfill it is closely knit after, restart drilling after drilling machine is resetted and apply
Work.
While drilling, drilling depth is measured using the method for lining rope plus sash weight, the weight satisfaction of sash weight crashes into bottom hole,
Guarantee the accuracy that drilling depth measures.After drilling depth reaches designed elevation, in Impact Bucket Grab cleaning hole bottom it is loose
Dregs.Stone is larger in casing, and when Impact Bucket Grab cannot be taken out, impact grinding for several times is carried out in casing using jump bit, broken
At slag take with Impact Bucket Grab again after fritter, shorten drilling cycle.In cleaning eye when dregs, Impact Bucket Grab is directly fallen to
Foot of hole is grabbed, and the block by diameter greater than 30mm is cleaned out.Do not apply freely falling body Height Impact power, prevents to bore
Hole stake is backbreak phenomenon.
Inner hole deposition slag uses gas lift reverse circulation borehole cleaning technique, installation conveying compressed air pipe, gas pipeline in conduit
Bottom is higher than the height of conduit bottom 0.5m, and air inlet pipe and discharge pipe is arranged in conduit top end socket, and the compression that air compressor machine generates is empty
Sediment and slurries are sufficiently mixed, companion by appendix pressurized delivered of the gas by being connected on conduit end socket to stake holes bottom
It is raised above with bubble, it is power source that the inside and outside slurries of conduit, which generate density contrast, and bubble lifts the mud containing sediment by leading
Pipe is sprayed to outside conduit, while sediment particulate removal in portable hole.The small mud of specific gravity or clear water are supplemented while borehole cleaning into hole,
Retaining hole bottom has constant level pressure.
(4) steel reinforcement cage is installed；
Merogenesis is transported to stake position after pile foundation steel bar cage acceptance(check), carries out lifting installation, reinforcing bar using 100t crawler crane
By the way of single-sided welding connection, same join domain connector area is 50% for connection, installation reinforcing bar protection on the outside of steel reinforcement cage
Layer cushion block prevents scraping collision steel reinforcement cage during promotion full-sleeve, causes rising of steel cage phenomenon.
(5) concreting；
Pile foundation concreting is irrigated using tremie method, and leak test is carried out before catheter installation, has conduit
Good sealing performance guarantees the pouring quality of concrete.Concrete slump control in 180~220mm, pile foundation concrete into
Row continuous pouring, and all perfusion work are completed before concrete initial set.The conduit of concrete perfusion controls in pile foundation always
The heart band of position, offset control within 100mm, and conduit flange is avoided to contact with steel reinforcement cage, avoid causing when promoting conduit
Rising of steel cage phenomenon.The elevation location that concrete rises is measured in time, is controlled the buried depth amount of conduit in 2~6m, is calculated simultaneously
The length of full-sleeve Transducers Embedded in Concrete part controls full-sleeve buried depth amount full-sleeve in 4~6m, timely removal hole.Pile foundation is mixed
In solidifying soil filling process, the depth of strict control conduit, full-sleeve Transducers Embedded in Concrete can prevent occur pulling out trustship phenomenon, protect
Card filling concrete is once completed.
(6) casing is extracted.
In solution cavity region, full-sleeve removes placket inner concrete face absolute altitude and is higher than sleeve bottom absolute altitude, and scope control exists
8m or so is avoided because solution cavity fills leakiness, and concrete surface declines under pressure, leads to showing in mud sleeve pipe
As causing the generation of broken pile and other issues.
The extraction of full-sleeve is to rotate drilling machine drive ring and drilling direction opposite direction, while slowly being mentioned using hydraulic cylinder
Rise full-sleeve.Connecting portion is higher by the position operating platform 1m high and carries out dismantling connection nut, and full-sleeve is carried out disassembly by root and is pulled out
Out, the casing disassembled is rinsed using giant, and the bolt hole in connection ring is applied oil guard.
This method carries out drilling pile wall using full-sleeve, solves karsts developing area geology condition karst cave treatment hardly possible, rich water
There are the technical problems such as hole, expanding of collapsing in sand seam geology；The safety such as occur collapsing when avoiding shallow-layer soil cave geotechnical boring pile driving construction
Hidden danger ensure that the safety and stablization of construction environment.It ensure that drilled pile construction quality, improve drilled pile pore-forming efficiency, add
Fast construction speed, has saved capital investment.
For this construction method compared with rotary drilling rig construction method, device structure height is low, good using full-sleeve retaining wall effect,
Pore-forming efficiency is high, and full-sleeve is used in turn the effective rate of utilization for often improving various resources, reduces security risk.Together
Class geological conditions shortens about 5 working days of construction period, has saved slurrying and compared with thick sand bed pre-pouring grout consolidation process expense
With foring good economic benefit.
Finally, it should be noted that these are only the preferred embodiment of the present invention, it is not intended to restrict the invention, although
Referring to embodiment, invention is explained in detail, for those skilled in the art, still can be to aforementioned
Technical solution documented by each embodiment is modified or equivalent replacement of some of the technical features, but it is all
Within the spirit and principles in the present invention, any modification, equivalent replacement, improvement and so on should be included in protection of the invention
Within the scope of.
Claims (10)
1. a kind of method using full-sleeve hydraulic drill rig construction In Karst Areas For Bridge pile foundation, it is characterised in that: including following step
It is rapid:
(1) measure of pile position setting-out；
(2) drilling machine and steel sleeve are in place；
(3) driving drilling machine carries out drilling construction until hole depth reaches predetermined design depth；
(4) steel reinforcement cage is installed；
(5) concreting；
(6) casing is extracted.
2. the method according to claim 1 using full-sleeve hydraulic drill rig construction In Karst Areas For Bridge pile foundation, feature
Be: the step (1) specifically includes the following steps:
(11) stake bit plane coordinate data is inputted into total station；
(12) using total station survey setting positioning pile foundation central point；
(13) pile foundation central point is marked using steel nail；
(14) the drilling contour line with stake diameter with size is done centered on central point.
3. the method according to claim 1 using full-sleeve hydraulic drill rig construction In Karst Areas For Bridge pile foundation, feature
It is:
Further include the steps that the verticality for adjusting casing within 1 ‰ in the step (2).
4. the method according to claim 1 using full-sleeve hydraulic drill rig construction In Karst Areas For Bridge pile foundation, feature
It is:
The step (2) the following steps are included:
(21) cutter head section is assembled with standard knot on ground；
(22) assembled cutter head section steel sleeve is lifted by crane, cutter head downwards, is put into drilling machine revolution driving ring；
(23) the hydraulic cohesion device for starting drilling machine, is fixed between the wedge block and steel sleeve of hydraulic cohesion device.
5. the method according to claim 1 using full-sleeve hydraulic drill rig construction In Karst Areas For Bridge pile foundation, feature
It is:
In the step (3), casing is in underground layer or layer of sand stage, and casing is pressed into using self weight, at this time rotational speed tune
To top gear or mid ranger, pressure 0KN, rotary torque 650-1550KNm；Casing enters general soil layer or hard soil layer
In the process, rotational speed is set as middling speed or low speed, pressure control in 500~1500KN, rotary torque control 650~
1550KN·m；Casing enter in weathering, micro- weathered rock formation when, rotational speed is set as low or first gear, pressure control 1500~
2500KN, rotary torque are controlled in 1550~2000KNm.
6. the method according to claim 1 using full-sleeve hydraulic drill rig construction In Karst Areas For Bridge pile foundation, feature
It is:
The step (3) further includes the steps that taking out the dregs in casing by grab bucket in boring procedure.
7. the method according to claim 6 using full-sleeve hydraulic drill rig construction In Karst Areas For Bridge pile foundation, feature
It is:
Dregs is cleared out when creeping into sand seam geology, in hole carries out after the drill-through layer of sand of full-sleeve.
8. the method according to claim 1 using full-sleeve hydraulic drill rig construction In Karst Areas For Bridge pile foundation, feature
It is:
It is poured in the step (5) using tremie method.
9. the method according to claim 8 using full-sleeve hydraulic drill rig construction In Karst Areas For Bridge pile foundation, feature
It is:
Keep the conduit of concrete perfusion always in pile foundation center position area, offset controls within 100mm, controls conduit
Buried depth amount in 2~6m, control full-sleeve buried depth amount in 4~6m.
10. the method according to claim 1 using full-sleeve hydraulic drill rig construction In Karst Areas For Bridge pile foundation, feature
Be: in the step (6), in solution cavity region, full-sleeve removes placket inner concrete face absolute altitude and is higher than sleeve bottom mark
It is high.
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| CN201810961681.6A CN109056709A (en) | 2018-08-22 | 2018-08-22 | A method of using full-sleeve hydraulic drill rig construction In Karst Areas For Bridge pile foundation |
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| CN201810961681.6A CN109056709A (en) | 2018-08-22 | 2018-08-22 | A method of using full-sleeve hydraulic drill rig construction In Karst Areas For Bridge pile foundation |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113445497A (en) * | 2020-03-24 | 2021-09-28 | 无锡市市政设施建设工程有限公司 | Hole forming process of full-casing full-slewing drilling machine |
| CN114837209A (en) * | 2022-05-19 | 2022-08-02 | 中铁三局集团第二工程有限公司 | Construction method of deep sand layer large-diameter pile foundation in karst development area |
| CN115613577A (en) * | 2022-12-21 | 2023-01-17 | 中铁二十二局集团轨道工程有限公司 | Full-rotation full-casing drilling machine and construction method for removing old pile thereof |
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| KR20110005183A (en) * | 2009-07-09 | 2011-01-17 | 전동중 | Possible to separate and assemble complex soft ground reinforcement method using a top stakes |
| CN102635113A (en) * | 2012-04-20 | 2012-08-15 | 深圳市金泰建设工程有限公司 | Construction method for hydraulic vibrating sinking pipe cast-in-place piles |
| CN104153352B (en) * | 2014-07-31 | 2017-02-15 | 广西科技大学 | Karst geology rotary-drilling bored concrete pile hole forming process |
| CN105887813A (en) * | 2016-05-07 | 2016-08-24 | 深圳市宏业基基础工程有限公司 | Large-diameter super-long pile construction method in karst area through full-casing pipe full rotating and rotary drilling |
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| CN114837209A (en) * | 2022-05-19 | 2022-08-02 | 中铁三局集团第二工程有限公司 | Construction method of deep sand layer large-diameter pile foundation in karst development area |
| CN115613577A (en) * | 2022-12-21 | 2023-01-17 | 中铁二十二局集团轨道工程有限公司 | Full-rotation full-casing drilling machine and construction method for removing old pile thereof |
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Address after: 510800 room 1507, No. 95, Yingbin Avenue, Huadu District, Guangzhou City, Guangdong Province Applicant after: China Railway 22nd Bureau Group Municipal Engineering Co., Ltd. Applicant after: China Railway Group Co., Ltd. Address before: 35 Shijingshan Road, Shijingshan District, Beijing Applicant before: China Railway Group Co., Ltd. Applicant before: China Railway 22nd Bureau Group Co., Ltd. Municipal Engineering Company |
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Application publication date: 20181221 |