CN104747088A - Single-waist multi-leaf hose bit for bored pile and drilling construction method thereof - Google Patents
Single-waist multi-leaf hose bit for bored pile and drilling construction method thereof Download PDFInfo
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- CN104747088A CN104747088A CN201510148007.2A CN201510148007A CN104747088A CN 104747088 A CN104747088 A CN 104747088A CN 201510148007 A CN201510148007 A CN 201510148007A CN 104747088 A CN104747088 A CN 104747088A
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- 238000005553 drilling Methods 0.000 title claims abstract description 58
- 238000010276 construction Methods 0.000 title claims abstract description 35
- 239000011435 rock Substances 0.000 claims abstract description 29
- 239000004567 concrete Substances 0.000 claims abstract description 22
- 241000277275 Oncorhynchus mykiss Species 0.000 claims abstract description 17
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 14
- 230000002787 reinforcement Effects 0.000 claims abstract description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 18
- 239000002689 soil Substances 0.000 claims description 17
- 230000035515 penetration Effects 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 8
- 239000013049 sediment Substances 0.000 claims description 8
- 230000010412 perfusion Effects 0.000 claims description 4
- 238000007667 floating Methods 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 210000003205 muscle Anatomy 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 241000721076 Echinodorus cordifolius Species 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000009435 building construction Methods 0.000 abstract description 2
- 230000002633 protecting effect Effects 0.000 abstract 1
- 238000005070 sampling Methods 0.000 abstract 1
- 229910052721 tungsten Inorganic materials 0.000 abstract 1
- 239000010937 tungsten Substances 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 206010008190 Cerebrovascular accident Diseases 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 208000006011 Stroke Diseases 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- 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
- E21B10/00—Drill bits
- E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
-
- 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
- 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
- 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
- E21B10/00—Drill bits
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Paleontology (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention belongs to the field of building construction and particularly relates to a single-waist multi-leaf hose bit for a bored pile and a drilling construction method thereof. The technological process comprises the steps of positioning and sampling, centering in position, forming a hole, clearing the hole for the first time, descending a reinforcement cage, descending a guide pipe, clearing the hole for the second time and pouring concrete. The single-waist multi-leaf hose bit for the bored pile comprises a single-waist multi-leaf taper bit body. A positioning and guiding cylinder is fixedly welded to the end of the single-waist multi-leaf taper bit body. A plurality of positioning and guiding cylinder tungsten steel heads are distributed on a circumferential edge opening of one end of the positioning and guiding cylinder. The single-waist multi-leaf hose bit of the bored pile and the drilling construction method thereof have the advantages that the directivity is good, the hole forming perpendicularity is high, the wall protecting effect is good, deslagging is convenient, the hole forming speed is high, and the rock breaking speed is high.
Description
Technical field
The invention belongs to the realm of building construction, be specifically related to the leafy hosqe bit of a kind of bored pile list waist and drilling construction method.
Background technology
Emerging in large numbers in recent years along with engineerings such as large scale industry, civilian construction, highrise buildings, direct foundation can not meet load requirement, and the advantages such as bored pile is large with its strong adaptability, bearing capacity, moderate cost, easy construction become the base form that construction work often adopts.But in highrise building, adopt bored pile foundation to be bearing stratum mainly with apoplexy rock stratum greatly.
Drilling pouring pile hole embedding rock in soft clay area generally adopts taper bit, rock bit and hosqe bit.
The steering capability of taper bit is poor, and easily collapse in pore forming process hole, enters rate of penetration after rock slow, meets comparatively hard formation and have gradient rock stratum drill bit to want pogo stick.Adopt its pore-forming time of rock bit slightly long, cost is higher, and drill bit is also expensive and itself is comparatively heavy, adds labour intensity and the process cost of construction.
When adopting hosqe bit to creep into, be rely on the tooth being contained in bottom periphery to be cut off by periphery rock after entering rock, rock constantly declines with drill bit and pierces in cylinder simultaneously, gets into correct position when carrying brill, side door closes up to be embraced rock in cylinder, and lower pressing door pours out rock.Hosqe bit also exists that drill bit is expensive, drill bit is heavy, also needs to carry brill and pours out rock, add labour intensity and the process cost of construction equally.This brings certain difficulty just to bored pile in work progress.
In view of the above circumstances, for the practical difficulty that drilling pouring pile hole and embedding rock are constructed in construction, the leafy hosqe bit of a kind of bored pile list waist after improving and drilling construction method is adopted effectively to solve the problem.
Summary of the invention
The first object of the present invention is to provide a kind of bored pile list waist leafy hosqe bit drilling construction method, to overcome shortcoming of the prior art.
For achieving the above object, the present invention specifically provides technical scheme to be: a kind of bored pile list waist leafy hosqe bit drilling construction method, technological process: construction layout → centering → pore-forming → first time in place clear hole → descending reinforcing cage → downcomer → second time hole → filling concrete clearly.
Further, described construction layout: surveying and locating, buries casing underground, guarantee shield-tube embedment slightly deviation time, ensure that drill bit can be correctly in place, and carry brill smoothly; The soil layer casing length low at water level is 1.2M, and the soil layer casing length that water level is higher is 2M.
Further, described centering in place: drilling rod, to after turntable leveling, adopts the verticality of the main drilling rod of transit survey in the orthogonal both direction of rig plane, guarantees the two waistband drill bit of vertical rear installation.
Further, in boring procedure, check the levelness of drilling machine platform at any time, find, adjust in time; Penetration rate according to different soil, the adjustment of stake footpath, can must slow down penetration rate, make all not bear drilling tool gravity at the bottom of hole, to reduce the resistance of single waist leafy hole formula drill bit pore-forming and middle weathered layer after entering rock; When boring reaches projected depth, should shut down in time, aperture, hole depth are checked, start to carry out once clear hole.
Further, descending reinforcing cage, install reinforcing cage, answers both sides symmetry to hang, guarantees that skeleton is vertically slowly transferred, and reinforcing cage top mark of controlling well is high, hangs muscle be fixed on correct elevation location with two, ensures that reinforcement cage skeleton does not sink to floating.
Further, put conduit, prepare corresponding conduit joint number according to hole depth, when transferring conduit, position is correct, and bayonet socket screws; With the space ensuring about 30-50CM at the bottom of hole at the bottom of conduit, prevent conduit from entering in sediment and concrete cannot be gushed out outside pipe.
Further, secondary pile hole cleaning, carries out secondary pile hole cleaning after putting conduit well, surveys sediment thickness; Perfusion concrete, concrete slump should control at 18CM-22CM; Beginning quantity should ensure to make conduit imbed more than 1M in concrete; According to pile diameter domination pipe-pulling speed, pipe laying depth is unsuitable too small or excessive, controls between 4-6M.
Another object of the present invention is to provide a kind of bored pile list waist leafy hosqe bit, to be applied to construction method described above.
For achieving the above object, concrete technical scheme provided by the invention is: the leafy hosqe bit of a kind of bored pile list waist, comprise the leafy taper bit of single waist, the leafy tapered bur head end of single waist is fixedly welded with positioning and guiding cylinder, the circumferential rim mouth of positioning and guiding cylinder one end is distributed with some positioning and guiding cylinder wolfram steel heads.
Further, the leafy taper bit of described single waist comprises drilling rod, the outer peripheral face of drilling rod is fixedly welded with some horizontal leaves, and some horizontal leaves are connected by horizontal loop; Described drilling rod is connected by some oblique leaves with horizontal loop, and the oblique end of blade of described drilling rod is fixedly welded with triangle drill bit, and this triangle drill bit is positioned at positioning and guiding cylinder.
Further, described some oblique leaves are fixedly welded with some oblique leaf wolfram steel heads, the oblique leaf wolfram steel head interval on described adjacent oblique leaf is arranged; Described triangle drill bit is fixedly welded with some triangles and bores wolfram steel head.
Realize technique scheme, the present invention compared with prior art has following characteristics:
One, the verticality of the good pore-forming of guidance quality is high: when adopting the leafy taper bit of common single waist to construct, in drilling process, taper bit something or somebody to fall back on portion conical head leads and breaks rock, guiding position is point-like, when guide head encounters the layer position of soft or hard inequality, easily partially enter toward soft subgrade soil direction, and then cause hole deviation, meet comparatively hard formation and have gradient rock stratum drill bit to want bouncing of drilling tool, sliding to bore and the breaking of rod, and the formula drill guide position, single waist leafy hole after improving is steel plate material circular bucket shape bottom belt wolfram steel head.When creeping into, wolfram steel head at the bottom of positioning and guiding cylinder is first carved into circular groove in rock stratum and is fixed drill bit, and the drill bit in centre carries out brokenly rock, thus the direction overcoming point-like motion is uncertain, ensures the verticality of pore-forming.
Two, retaining wall is made good use of: the leafy taper bit of common single waist is in drilling process, and be neutral gear substantially below drill bit waistband, during drill bit rotational, the mud direction of motion is synchronous with drill bit, is formed wash away hole wall.Easily cause collapse hole and borehole enlargement, single waist leafy hole formula drill bit after improvement is because horizontal blade and oblique vane are with the inclination angle of 45 degree, mud vertically rises from drilling rod position, and there is again good retaining wall effect positioning and guiding barrel head position, can reduce washing away hole wall.
Three, deslagging is convenient: hosqe bit enters rock and rock cut off needs and carries brill and pour out rock.And single waist leafy hole formula drill bit is not owing to all closing up and down, rock disintegrating slag can be discharged by mud buoyancy from drill bit internal along drilling rod.
Four, fast, the broken rock speed of pore-forming is fast: single waist leafy hole formula drill bit is by the broken rock in multiple wolfram steel head paddle-tumble location on positioning and guiding cylinder, again by middle taper bit detritus, wolfram steel head reaming on oblique vane, therefore substantially increases pore-forming and breaks rock speed.
Accompanying drawing explanation
Fig. 1 is the leafy hosqe bit structural representation of list waist of the present invention; Fig. 2 is the leafy hosqe bit sectional view of list waist of the present invention.
Detailed description of the invention
As shown in Figure 1, 2, what the present invention disclosed is the leafy hosqe bit of a kind of bored pile list waist, comprise the leafy taper bit 10 of single waist, single waist leafy taper bit 10 end is fixedly welded with positioning and guiding cylinder 6, the circumferential rim mouth of positioning and guiding cylinder 6 one end is distributed with some positioning and guiding cylinder wolfram steel heads 7.
Further, the leafy taper bit 10 of described single waist comprises drilling rod 1, the outer peripheral face of drilling rod 1 is fixedly welded with some horizontal leaves 3, and some horizontal leaves 3 are connected by horizontal loop 2; Described drilling rod 1 is connected by some oblique leaves 4 with horizontal loop 2, and oblique leaf 4 end of described drilling rod 1 is fixedly welded with triangle drill bit 9, and this triangle drill bit 9 is positioned at positioning and guiding cylinder 6.
Further, described some oblique leaves 4 are fixedly welded with some oblique leaf wolfram steel heads 5, oblique leaf wolfram steel head 5 interval on described adjacent oblique leaf 4 is arranged; Described triangle drill bit 9 is fixedly welded with some triangles and bores wolfram steel head 8.
A kind of bored pile list waist leafy hosqe bit drilling construction method, concrete steps are as follows:
A. surveying and locating
B. bury casing (steel pile casting adopt 5MM steel plate make) underground, guarantee shield-tube embedment slightly deviation time, ensure that drill bit can be correctly in place, and carry brill smoothly.The soil layer casing length low at water level is 1.2M, and the soil layer casing length that water level is higher is 2M.Principle guarantee casing enters undisturbed soil 50CM, and about 30CM above ground level, to guarantee the head pressure being not less than 1M.
C. drilling rod is to after turntable leveling, adopts the verticality of the main drilling rod of transit survey in the orthogonal both direction of rig plane, guarantees the single waistband drill bit of vertical rear installation.Carefully should check the size diameter of drill bit before drill bit is installed, after installing, check whether drill bit is connected with drilling rod firm, and whether drill bit, connector and drilling rod have the hidden danger such as crack to exist.
D., in sandy soil stratum, forbid to use clear water perforate, should prepare proportion is that 1.3-1.4 mud enter in mud pit and hole.Every platform pile foundation should arrange 2 mud pits simultaneously, and the mud of hole Inner eycle is introduced into after sedimentation basin precipitates and flows into second mud pit again.
E. in boring procedure, check the levelness of drilling machine platform at any time, find, adjust in time.Penetration rate can according to different soil, the adjustment of stake footpath.When soil property plasticity is better, stake footpath is less, when resistance is less in drilling process, suitably penetration rate should be accelerated., gravel layer, soft or hard soil layer poor in soil property plasticity join, stake footpath is comparatively large, should slow down penetration rate when resistance is larger in drilling process.Should be specifically noted that and must slow down penetration rate after entering rock, make all not bear drilling tool gravity at the bottom of hole, to reduce the resistance of single waist leafy hole formula drill bit pore-forming and middle weathered layer.Can not creep into by force when there is bit freezing, should first on carry drill bit after, then to creep into, otherwise easily cause drill rod breaking, fall the quality accidents such as brill.
F. bore operation is put into several classes and is carried out continuously, does not interrupt.When stopping for some reason in the borehole to bore, one is the mud guaranteeing to have predetermined water level and corresponding proportion, prevents collapse hole; Two is carry about 2M by drill bit, in case boring mud precipitates and buries drill bit, causes quality accident.
G. because single waist leafy hole formula drill bit pore-forming is larger than normal drill bit weight, when lifting drilling tool, should smooth operation be ensured, when drill bit promotes, prevent collision casing, hole wall and the phenomenon at the bottom of hook casing and occur.
H. when boring reaches projected depth, should shut down in time.Aperture, hole depth are checked, test oneself qualified after, report Supervision survey, starts to carry out once clear hole after agreement.
I. after reaching projected depth, start first time clear hole, after first time, clear hole completed, carry drilling rod, descending reinforcing cage, downcomer, carry out second time hole clearly, the complete survey sediment thickness in clear hole, sediment thickness reaches placing of concrete after designing requirement.
J. descending reinforcing cage.The on-the-spot merogenesis of reinforcing cage makes, and length is determined according to the stake of actual hole depth is long, ensures that joint staggers by 50%, and same reinforcing bar two joints stagger more than 35d; Fabrication of reinforcing cage can use after well reporting management acceptance(check) afterwards; Reinforcing cage connects employing single-selded lap joint, and length is 12d, takes appointment with certificate, and ensure that weld seam is full, length meets code requirement; Install reinforcing cage, answers both sides symmetry to hang, guarantees that skeleton is vertically slowly transferred, and reinforcing cage top mark of controlling well is high, hangs muscle be fixed on correct elevation location with two, ensures that reinforcement cage skeleton does not sink to floating (mainly referring to that reinforcing cage is not the stake of full cage).
K. conduit is put.Corresponding conduit joint number is prepared, one-time-reach-place when ensureing to install according to hole depth; When transferring conduit, position should be correct, and bayonet socket screws; From the space (pile diameter dominations according to different) ensuring about 30-50CM at the bottom of hole at the bottom of conduit, prevent conduit from entering in sediment and concrete cannot be gushed out outside pipe; Separately avoid at the bottom of hole too high, make the first bucket concrete perfusion cannot bury conduit mouth or depth of tremie very little, mud again pours in conduit and forms folder mud, affects pile quality.
L. secondary pile hole cleaning.Carry out secondary pile hole cleaning after putting conduit well, survey sediment thickness, meet after the management of designing requirement report is agreed to and start concrete perfusion.
M. concrete is poured into.Concrete slump should control at 18CM-22CM; Beginning quantity should ensure to make conduit imbed more than 1M in concrete; According to pile diameter domination pipe-pulling speed, pipe laying depth is unsuitable too small or excessive, controls between 4-6M.
Bored pile uses single waist leafy hole formula drill bit drilling construction, its construct with common drilling pile drill compared with benefit obvious:
Bored pile construction adopts single waist leafy hole formula drill bit drilling construction, solves stake holes deflection, enters rock drilling depth slow, the quality problems such as hole of easily collapsing, thus ensure that hole quality.Greatly reduce the probability of cleaning bottom of hole and redrilling, save the direct cost (as: charges for water and electricity, labour cost etc.) of construction.
While guarantee hole quality, accelerate the speed transferring reinforcing cage.Workload of doing over again also greatly reduces, thus accelerates construction speed.
Bored pile adopts single waist leafy hole formula drill bit pore-forming in middle weathered layer construction, plays the effect of righting, guiding, plays a significant role in control pile body verticality; Simultaneously due to single waist leafy hole formula drill bit pore-forming mud off better effects if compared with common brill.Guarantee is have also been obtained in control concrete fullness coefficient.Can not tilt because of hole wall, cause fullness coefficient excessive after collapse hole, cleaning bottom of hole, and waste a large amount of concretes.According to record, use the actual fullness coefficient of construction king-pile of normal drill bit in the area such as sandy soils, the uneven soil layer of sand soft or hard generally between 1.3-1.4.And adopt single waist leafy hole formula drill bit drilling construction fullness coefficient between 1.1-1.2.
Above-mentioned fact Example is only for explaining the design that patent of the present invention is described; but not the restriction to patent right protection of the present invention, all changes utilizing this design patent of the present invention to be carried out to unsubstantiality, such as change bar cross section; plant bulk changes, and all should fall into the protection domain of patent of the present invention.
Claims (10)
1. a bored pile list waist leafy hosqe bit drilling construction method, is characterized in that, technological process: the clear hole → filling concrete of construction layout → centering → pore-forming → first time in place clear hole → descending reinforcing cage → downcomer → second time.
2. a kind of bored pile list waist according to claim 1 leafy hosqe bit drilling construction method, is characterized in that, described construction layout: surveying and locating, bury casing underground, guarantee shield-tube embedment slightly deviation time, ensure that drill bit can be correctly in place, and carry brill smoothly; The soil layer casing length low at water level is 1.2M, and the soil layer casing length that water level is higher is 2M.
3. a kind of bored pile list waist according to claim 1 leafy hosqe bit drilling construction method, it is characterized in that, described centering in place: drilling rod is to after turntable leveling, adopt the verticality of the main drilling rod of transit survey in the orthogonal both direction of rig plane, guarantee the two waistband drill bit of vertical rear installation.
4. a kind of bored pile list waist according to claim 1 leafy hosqe bit drilling construction method, is characterized in that: in boring procedure, checks the levelness of drilling machine platform at any time, finds, adjusts in time; Penetration rate according to different soil, the adjustment of stake footpath, can must slow down penetration rate, make all not bear drilling tool gravity at the bottom of hole, to reduce the resistance of single waist leafy hole formula drill bit pore-forming and middle weathered layer after entering rock; When boring reaches projected depth, should shut down in time, aperture, hole depth are checked, start to carry out once clear hole.
5. a kind of bored pile list waist according to claim 1 leafy hosqe bit drilling construction method, it is characterized in that: descending reinforcing cage, install reinforcing cage, both sides symmetry is answered to hang, guarantee that skeleton is vertically slowly transferred, reinforcing cage top mark of controlling well is high, hangs muscle be fixed on correct elevation location with two, ensures that reinforcement cage skeleton does not sink to floating.
6. a kind of bored pile list waist according to claim 1 leafy hosqe bit drilling construction method, is characterized in that: put conduit, prepares corresponding conduit joint number according to hole depth, and when transferring conduit, position is correct, and bayonet socket screws; With the space ensuring about 30-50CM at the bottom of hole at the bottom of conduit, prevent conduit from entering in sediment and concrete cannot be gushed out outside pipe.
7. a kind of bored pile list waist according to claim 1 leafy hosqe bit drilling construction method, is characterized in that: secondary pile hole cleaning, carries out secondary pile hole cleaning after putting conduit well, surveys sediment thickness; Perfusion concrete, concrete slump should control at 18CM-22CM; Beginning quantity should ensure to make conduit imbed more than 1M in concrete; According to pile diameter domination pipe-pulling speed, pipe laying depth is unsuitable too small or excessive, controls between 4-6M.
8. the leafy hosqe bit of bored pile list waist, it is characterized in that: comprise the leafy taper bit of single waist, the leafy tapered bur head end of single waist is fixedly welded with positioning and guiding cylinder, the circumferential rim mouth of positioning and guiding cylinder one end is distributed with some positioning and guiding cylinder wolfram steel heads.
9. the leafy hosqe bit of a kind of bored pile list waist according to claim 8, is characterized in that: the leafy taper bit of described single waist comprises drilling rod, the outer peripheral face of drilling rod is fixedly welded with some horizontal leaves, and some horizontal leaves are connected by horizontal loop; Described drilling rod is connected by some oblique leaves with horizontal loop, and the oblique end of blade of described drilling rod is fixedly welded with triangle drill bit, and this triangle drill bit is positioned at positioning and guiding cylinder.
10. the leafy hosqe bit of a kind of bored pile list waist according to claim 9, is characterized in that: described some oblique leaves are fixedly welded with some oblique leaf wolfram steel heads, and the oblique leaf wolfram steel head interval on described adjacent oblique leaf is arranged; Described triangle drill bit is fixedly welded with some triangles and bores wolfram steel head.
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| CN201510148007.2A CN104747088B (en) | 2015-03-31 | 2015-03-31 | A kind of leafy hosqe bit of cast-in-situ bored pile list waist and drilling construction method |
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| CN201510148007.2A CN104747088B (en) | 2015-03-31 | 2015-03-31 | A kind of leafy hosqe bit of cast-in-situ bored pile list waist and drilling construction method |
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| CN105317381A (en) * | 2015-11-06 | 2016-02-10 | 宁波易通建设有限公司 | Drill bit for constructing cast-in-situ bored pile and hole forming method using same |
| CN105317382A (en) * | 2015-11-06 | 2016-02-10 | 宁波易通建设有限公司 | Drill bit for constructing bored piles and construction method using same |
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| CN107165581A (en) * | 2017-06-09 | 2017-09-15 | 上海建工二建集团有限公司 | A kind of GPS drill bit of drilling machine and GPS rig pile foundation drilling construction method |
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| CN111197305A (en) * | 2020-01-06 | 2020-05-26 | 湖北省路桥集团有限公司 | Construction method of ultra-long large-diameter cast-in-situ bored pile |
| CN112576195A (en) * | 2019-09-28 | 2021-03-30 | 中铁第六勘察设计院集团有限公司 | Hard cutting secant pile construction drill bit with guiding function and construction process thereof |
| CN113585993A (en) * | 2021-07-22 | 2021-11-02 | 深圳市工勘岩土集团有限公司 | Drilling and hole-cleaning pile-forming method for super-thick covering layer large-diameter rock-socketed cast-in-place pile |
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| CN108590533A (en) * | 2018-06-26 | 2018-09-28 | 浙江易通基础工程有限公司 | The drill bit of construction drill bored concrete pile |
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| CN110318684A (en) * | 2019-05-20 | 2019-10-11 | 国网江苏省电力有限公司 | A kind of drill bit for holing with slurry wall protection filling pile construction |
| CN112576195A (en) * | 2019-09-28 | 2021-03-30 | 中铁第六勘察设计院集团有限公司 | Hard cutting secant pile construction drill bit with guiding function and construction process thereof |
| CN110924428A (en) * | 2019-11-08 | 2020-03-27 | 中天建设集团有限公司 | Pile-forming construction method for cast-in-place pile to penetrate existing basement structure |
| CN111042739A (en) * | 2019-11-29 | 2020-04-21 | 上海市政建设有限公司 | Drill bit of drilling machine and drilling method of hard soil layer |
| CN111197305B (en) * | 2020-01-06 | 2021-10-22 | 湖北省路桥集团有限公司 | Construction method of ultra-long large-diameter cast-in-situ bored pile |
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| CN113585993A (en) * | 2021-07-22 | 2021-11-02 | 深圳市工勘岩土集团有限公司 | Drilling and hole-cleaning pile-forming method for super-thick covering layer large-diameter rock-socketed cast-in-place pile |
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