CN104514488B - Complete device and method for detecting drilling core of large-diameter bored pile under existing building - Google Patents
Complete device and method for detecting drilling core of large-diameter bored pile under existing building Download PDFInfo
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- CN104514488B CN104514488B CN201410810548.2A CN201410810548A CN104514488B CN 104514488 B CN104514488 B CN 104514488B CN 201410810548 A CN201410810548 A CN 201410810548A CN 104514488 B CN104514488 B CN 104514488B
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- 238000005553 drilling Methods 0.000 title claims abstract description 109
- 238000000034 method Methods 0.000 title claims abstract description 10
- 230000007246 mechanism Effects 0.000 claims abstract description 7
- 238000011065 in-situ storage Methods 0.000 claims description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 238000005070 sampling Methods 0.000 claims description 4
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 235000008331 Pinus X rigitaeda Nutrition 0.000 claims 1
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- 230000004048 modification Effects 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
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- 238000007906 compression Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
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- 239000013535 sea water Substances 0.000 description 1
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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
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
-
- 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
- E21B15/00—Supports for the drilling machine, e.g. derricks or masts
- E21B15/04—Supports for the drilling machine, e.g. derricks or masts specially adapted for directional drilling, e.g. slant hole rigs
-
- 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
- E21B7/06—Deflecting the direction of boreholes
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Abstract
The invention discloses a complete device and method for detecting a drilling core of a large-diameter bored pile under an existing building. The complete device comprises a base, a drilling machine and a hoisting system, a drilling tool is arranged on the drilling machine and comprises a driving drill rod, a plurality of driven drill rods, a drill bit and a core barrel, the hoisting system comprises a tower and a hoist which are hinged onto the base, an adjusting mechanism for adjusting an inclination angle is arranged on the base, guide rails are arranged on two sides of the base, a base lead screw is arranged on the base, one end of the base lead screw is connected with a driving motor, and the base lead screw drives the drilling machine and the hoisting system to slide along the guide rails. The inclination angle of the drilling machine is adjusted by a screw rod, a spherical groove of a footing support is matched with the bottom of a bolt, the inclination angles of the drill rods can be precisely adjusted, drilling axis angles are changed by the weight of a drill collar, adjusting precision is high, operation is facilitated, and a core of the bored pile of the existing building can be pulled in a narrow space.
Description
Technical field
The invention belongs to technical field of building construction is and in particular to a kind of carried out to large-section in-situ concrete pile under existing building
The complete set of equipments of drilling core checking and method.
Background technology
Due to due to following, need the foundation of existing building is detected：
(1) during reform and opening-up rapid economic development, because of relatively lagging behind of planning construction management, many places go out
Now formally do not report the construction project built in a large number, need to carry out construction engineering test identification confirmation；
(2) transformation to old building and appraisal and evaluation, due to historical reasons, data loss, foundation is in confused situation
(3) under the anthropic factor such as the natural causes such as earthquake, typhoon, sea water intrusion and overload, ship collision effect, basis
Deterioration may occur, damage, basis is also required to be identified；
(4) some build up building soon, and because ground problem causes superstructure to tilt, ftractures, it is right to need also exist for
Its basis re-starts Testing and appraisal.
For the pile foundation under existing building, because it is connected with superstructure, working space is narrow and small, current probing
Equipment, such as XY-1, XY-1A, on the construction due to cannot completely drill through pile foundation under existing building, the problem existing
Mainly have：1. for needing to open the rig of gyroscope, position of opening typically can only achieve 60cm from the minimum distance of post (wall)
Left and right is it is impossible to close to stake top face, even if rat holing, also cannot obtain the complete core sample of whole pile；2. base slidingtype is bored
Machine although post (wall) can be pressed close to, but due to post (wall) obstacle it is impossible to complete installation and the dismounting of drilling rod；3. bore angle controls
Not, for the situation needing dozen small angle inclination hole (with plumb line angle within 5 °), existing rig is not due to having for ability
There is accurate leveling with measurement apparatus it is impossible to be accurately controlled required angle of inclination.
Content of the invention
The present invention in order to solve existing building narrow space it is difficult to take out the technical problem of complete bored concrete pile core sample,
A kind of adjustable-angle, inclined drilling are provided, can be taken off complete core sample major diameter under existing building is filled in small space
Note stake carries out complete set of equipments and the method for drilling core checking.
In order to solve the above problems, the present invention is achieved by technical scheme below：
The complete set of equipments that large-section in-situ concrete pile under existing building is carried out with drilling core checking of the present invention,
Including base, rig and hoisting system it is characterised in that：It is provided with drilling tool, described drilling tool includes on described rig
Kelly, some driven drilling rod entering in boring, coring tube and drill bit, described hoisting system includes being hinged on base
Pylon and hoist engine；The governor motion adjusting its angle of inclination is provided with described base, described base both sides are provided with guide rail,
Base screw mandrel for mobile drill is additionally provided with described base, described base screw mandrel one end is connected with motor, described
Base screw mandrel drives rig along slide.
Further, described governor motion include the regulating bolt hole being arranged on base and regulating bolt hole cooperation
Screw rod and the retaining mechanism for tie down screw；The bottom of described screw rod be spheric end, described screw rod bottom be provided with described
The footing bearing of spheric end cooperation, described footing bearing is provided with the indent spherical groove with the cooperation of described spheric end.
Further, described retaining mechanism include being arranged on base locking bed corresponding with regulating bolt hole and with described
The locking nut of locking bed cooperation, described locking nut is provided with installing hole, described screw rod and the locking nut installing screw rod
Installing hole cooperation one end be provided with locking plane, matched with the section of screw rod in the section of described installing hole, described locking
It is provided with positioning tooth on seat, described locking nut is provided with the fixing tooth with the positioning tooth cooperation of described locking bed, described lock
Jack panel has been radially arranged bolt hole, and described bolt hole is provided with clamping screw.
Further, described rig is provided with slow-speed of revolution high torque anti-converting, and described rig is vertical shaft type slewing drilling machine, band
Dynamic drilling tool revolution.It is provided with drill collar, described coring tube is arranged on drill collar between described driven drilling rod and drill bit；Described active is bored
Bar passes through screwed connection with driven drilling rod, described kelly is provided with through-core hole, described rig is additionally provided with water inlet pipe,
Described water inlet pipe is connected with the through-core hole of kelly., under the action of gravity of drill collar, drilling tool decentralization, so that bore for drilling tool
Head rest, below hole wall, forces boring sagging, realizes bending drilling.
Further, described kelly length L3≤U-L'1-L2, during perforate, perforate coring tube length and the length of the bit
Sum L4≤L'1；Each round trip drilling depth K≤U-L1-L2, when normally creeping into, described coring tube length L5>=K, described driven
Run of steel is the integral multiple of footage per round trip during design normal drilling, and wherein U is working space height, L1For rig ox head top
Terrain clearance, L1' it is the liftoff height in rig ox head bottom, L2For water inlet pipe and kelly joint distance.
Further, described base is provided with inclinator, described inclinator is used for detecting the angle of inclination of rig vertical shaft.
Further, described base is provided with circular bubble, for detecting the horizontality of base.
A kind of method that drilling core checking is carried out to large-section in-situ concrete pile under existing building, including：
(1) rigging up, makes position of opening close proximity to the post (wall) above stake top, determines inclination alpha needed for boring, it is
Big value isWherein D is stake diameter, and d is the distance of drill center and stake side, and H is that stake is long, h
For cushion cap height；
(2) screw rod on adjusting base is so that base is horizontally disposed with, if now the initial tilt of kelly is θ, its
By the base longitudinal axis along the projection θ in vertical plane1, by base transverse axis along the inclination angle in vertical plane be θ2；
(3) eliminate drilling tool in transverse axis along vertical plane angle theta2, inclinator is vertically placed in and stands positioned at described rig on base
Axle lateral location, the screw rod on adjusting base, until inclinator instruction kelly by base transverse axis along inclining in vertical plane
Angle is 0；Number of turns N of rotary support c screw rod2Can be estimated by formula：Wherein δ revolves for screw rod
Base cross shaft surface adjustable slanted angle when turning 1 circle, X is the pitch of screw rod, and B is the distance between base transverse axis screw rod；
(4) eliminate drilling tool in the longitudinal axis along vertical plane angle theta1, and adjust kelly to required inclination alpha；Inclinator is horizontal
It is placed on base and is located at described rig vertical shaft front position, adjusting screw rod, until inclinator instruction kelly is the bottom of by
The seat longitudinal axis is α along the inclination angle in vertical plane；Number of turns N of rotary screw1Can be estimated by formula：
The wherein maximum inclination angle of the rig of α, β is the adjustable slanted angle in base longitudinal axis face during screw rod rotation 1 circle, and X is the spiral shell of screw rod
Away from L is the distance between screw rod before and after base；
(5) to specifying after tilt angle alpha, locking nut is engaged fixation with base to adjustment kelly, and passes through radial direction spiral shell
Bolt tie down screw；
(6) driven kelly, coring tube and drill bit are installed, described rig drives drilling tool inclined drilling large-section in-situ concrete pile
Interior；
(7) depth L that it is coring tube to the length of core sample that drilling tool creeps into5Afterwards, stop drilling；Brill is above carried by hoisting system
Tool, the connection of loose unloading kelly and driven drilling rod, using rig low speed and large torque anti-converting dismantle completely kelly with from
Dynamic drilling rod；Rig substructure screw mandrel drives rig to move along after slide rail, and driven drilling rod is taken out by hoisting system, takes out core sample；
(8) again being connected the driven drilling rod of appropriate length using hoist engine puts in boring, and screw mandrel drives rig edge
Slide rail moves forward, and connects kelly and driven drilling rod, starts rig coring sample；
(9) repeat step (7), (8), until complete the core pulling sampling of whole pile.
Further, in described step (5), described locking nut bottom is provided with fixing tooth, described floor installation screw rod
Position be provided with the locking bed with the cooperation of the fixing tooth of locking nut.
Further, eliminate transverse axis in described step (3) along vertical plane angle theta2, by hanging bearing b, adjust bearing c's
Screw rod so that inclinator instruction kelly by base transverse axis along the inclination angle in vertical plane be 0；Eliminate in described step (4)
The longitudinal axis is along vertical plane angle theta1, by hanging bearing b, adjust the screw rod of bearing a so that inclinator instruction kelly is the bottom of by
The seat longitudinal axis is α along the inclination angle in vertical plane.
Compared with prior art, the invention has the beneficial effects as follows：
The present invention adopts screw rod to adjust the angle of inclination of rig, and the ball recess of footing bearing is joined with stud base's spheric end
Close, to place strong adaptability, the angle of inclination of drilling rod, the application of base screw mandrel can be adjusted in high precision, drive rig along before guide rail
After move, make rig can be sufficiently close together post (wall), be easy to load and unload drilling rod, tower height is adapted to the short sky such as basement again
Between, using flexible, adapt to narrow space, drilling rod angle and curved drilling rod is forced by drill collar weight, change the side of boring
To making the present invention also can complete the complete core sample of bored concrete pile foundation in short space and extract.Present configuration is simple, operation peace
Dress is convenient, safe and reliable, can carry out the extraction core sample work of existing building bored concrete pile well.
Brief description
Below in conjunction with the accompanying drawings the specific embodiment of the present invention is described in further detail, wherein：
Fig. 1 is the main view of the complete set of equipments that large-section in-situ concrete pile under existing building is carried out with drilling core checking of the present invention
Figure；
Fig. 2 is the vertical view of the complete set of equipments that large-section in-situ concrete pile under existing building is carried out with drilling core checking of the present invention
Figure；
Fig. 3 is the active of the complete set of equipments that large-section in-situ concrete pile under existing building is carried out with drilling core checking of the present invention
Drilling rod inclination angle schematic diagram；
The base knot of Fig. 4 complete set of equipments that large-section in-situ concrete pile under existing building is carried out with drilling core checking of the present invention
Structure schematic diagram.
Fig. 5 is the drilling tool of the complete set of equipments that large-section in-situ concrete pile under existing building is carried out with drilling core checking of the present invention
Bending schematic diagram；
When Fig. 6 is that the complete set of equipments that large-section in-situ concrete pile under existing building is carried out with drilling core checking of the present invention tilts
Structural representation.
In figure：1- rig ox head, 2- pylon, 21- support, 22- support bar, 3- base, 31- locking bed, 4- base screw mandrel,
5- guide rail, 6- locking nut, 61- fixing tooth, 62- bolt hole, 7- screw rod, 71- ball-type end, 72- locks plane, and 8- footing props up
Seat, concave sphere groove in 81-, 9- clamping screw, 10- inclinator, 11- circular bubble, 12- hoisting system, 13- steel wire rope, 14- bores
Tool, 141- kelly, the driven drilling rod of 142-, 143- drill collar, 144- coring tube, 145- drill bit, 15- bored concrete pile, 16- wall,
17- water inlet pipe.
Specific embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are illustrated it will be appreciated that preferred reality described herein
Apply example to be merely to illustrate and explain the present invention, be not intended to limit the present invention.
As shown in Fig. 1～Fig. 6, of the present invention the complete of drilling core checking is carried out to large-section in-situ concrete pile under existing building
Equipment, including base 3, setting rig on the base 3 and hoisting system 12, described hoisting system 12 includes being arranged on rig
Hoist engine and the pylon 2 that is hinged on base, the steel wire rope 13 of hoist engine passes through the drilling tool of the fixed pulley on pylon 2 and rig
14 connections.
Described rig is provided with slow-speed of revolution high torque anti-converting；Described rig is vertical shaft type slewing drilling machine, drives drilling tool to return
Turn.
As shown in fig. 6, described drilling tool 14 includes kelly 141, some driven drilling rod 142 entering in boring, it is used for
Increase the drill collar 143 of drilling system deadweight, described drill collar 143 is connected with coring tube 144, described coring tube 144 and drill bit 145
Connect, described kelly 141 and driven drilling rod 142 pass through screwed connection, and described kelly 141 is driven by described rig vertical shaft
Dynamic, described kelly 141 is provided with through-core hole, described rig is additionally provided with water inlet pipe 17, described water inlet pipe 17 and master
The through-core hole of dynamic drilling rod connects.In drill collar 143 under gravity, drilling tool decentralization, so that drill bit is against side under hole wall,
Force boring sagging, realize bending drilling.Length L of described kelly 1413≤U-L'1-L2, in perforate, described coring
Tube length degree and the length of the bit sum L4≤L'1；Each round trip drilling depth K≤U-L1-L2, during normal drilling coring, described coring
Length L of cylinder5>=K, described driven run of steel is the integral multiple of footage per round trip during design normal drilling, and wherein U is that operation is empty
Between height, L1For rig ox head top terrain clearance, L1' it is the liftoff height in rig ox head bottom, L2For water inlet pipe and actively brill
Knock-off joint distance.
As shown in figure 4, described base 3 is provided with the governor motion at adjusting base 3 angle of inclination, described governor motion includes
Bolt hole on the base 3 and the screw rod 7 of bolt hole cooperation and the retaining mechanism for standing screw 7, described screw rod 7 are set
Bottom be spheric end 71, its other end be provided with locking plane 72, its section be polygon, described screw rod 7 bottom be provided with
The footing bearing 8 that its spherical 71 cooperation is installed, described footing bearing 8 is provided with the indent with screw rod 7 bottom hemispheric 71 cooperation
Spherical groove 81.
Described retaining mechanism is included arranging locking bed 31 corresponding with bolt hole on the base 3 and is coordinated with locking bed 31
Locking nut 6, described locking bed 31 is provided with positioning tooth, described locking nut 6 is provided with and positioning tooth cooperation consolidate
Determine tooth 61, described locking nut 6 is provided with the installing hole passing through for screw rod, the section of described installing hole is cut with screw rod 7
Matching in face, described locking nut 6 has been radially arranged bolt hole 62, bolt hole 62 is provided with clamping screw 9, clamping screw
The locking plane 72 of 9 clamping screws 7, prevents screw rod 7 radial rotating.Because being matched with screw rod 7 section in installing hole section, rotation
Locking nut 6 adjusting screw rod 7 rotates, thus making base tilt or level, not during adjusting screw rod, compression locking nut 6, makes downwards
Fixing tooth 61 is engaged with the positioning tooth on locking bed 31, then by clamping screw 9 tie down screw 7 of radial direction.
Guide rail 5 is provided with described base 3, base 3 is additionally provided with base screw mandrel 4, base screw mandrel 4 is connected with driving electricity
Machine, base screw mandrel 4 is connected with rig ox head 1, and in the presence of motor, base screw mandrel 4 drives rig ox head 1 along guide rail 5
Movable.
Also it has been horizontally disposed with circular bubble 11, for detecting the horizontality of base 3 on described base 3.
Described pylon 2 includes support 21 and support bar 22, and described support 21 one end is hingedly coupled to base 3, and the other end sets
Be equipped with fixed pulley, the two ends of described support 21 form one 90 degree～170 degree of angle, described support bar 22 be articulated with base
3, the other end is hinged with support 21.
A kind of method carrying out drilling core checking to large-section in-situ concrete pile under existing building, comprises the following steps：
(1) rigging up, makes position of opening close proximity to the post (wall) above stake top, determines that needed for boring, inclination alpha is maximum
Value,Wherein D is stake diameter, and d is the distance of drill center and stake side, and H is that stake is long, and h is cushion cap
Highly, for obtaining the complete core sample of whole pile, preferably choose the angle drilling close to max α, when boring is located within stake top face,
Drilling angle of inclination then can be reduced as one sees fit.
(2) each screw rod 7 on adjusting base, observes circular bubble 11 so as to bubble is placed in the middle simultaneously, thus reaching leveling bottom
Seat purpose, if now kelly initial tilt be θ, its by the inclination angle in base longitudinal axis vertical guide be θ1, logical
Crossing the inclination angle in base transverse axis vertical guide is θ2.
(3) eliminate drilling tool 14 first in transverse axis vertical guide angle theta2, inclinator 10 is vertically placed in base and is located at rig
In vertical shaft lateral location, hanging bearing b, adjust bearing c screw rod 7, until inclinator 10 instruction kelly is horizontal by base
Inclination angle in axle vertical guide is 0.Number of turns N of rotary support c screw rod2Can be estimated by formula：Its
Middle δ be screw rod rotation 1 circle when the adjustable slanted angle of base cross shaft surface, X be screw rod pitch, B be base transverse axis screw rod it
Between distance.
(4) secondly eliminate drilling tool in longitudinal axis vertical guide angle theta1, and adjust kelly 14 to required inclination alpha, by inclination angle
Instrument 10 is transversely arranged in base and is located on the position in rig vertical shaft front, and hanging bearing b adjusts bearing a screw rod 7, until inclination angle
Instrument 10 instruction kelly by the inclination angle in base longitudinal axis vertical guide be α.Number of turns N of rotary support a screw rod1Can be by public affairs
Formula is estimated：The inclination angle of wherein rig ox head 1 maximum of α, β is base during screw rod rotation 1 circle
The adjustable slanted angle in longitudinal axis face, X is the pitch of screw rod 7, and L is the distance between screw rod before and after base.
(5) after adjustment kelly extremely specifies tilt angle alpha, by locking nut 6 tie down screw 7, locking nut 6 bottom
Fixing tooth 61 engage with the positioning tooth of locking bed 31, described locking nut 6 is provided with the installation for being coordinated with screw rod 7
Hole, the section of this installing hole is coordinated with screw rod 7 section, and described screw rod 7 is provided with locking plane with one end of locking nut 6 cooperation
72, locking nut 6 bottom is provided with fixing tooth 61, described base 3 is provided with the locking bed 31 with fixing tooth 61 cooperation, passes through
Clamping screw 9 on locking nut 6 radial bolts hole 62 is fixing by screw rod 7, prevents screw rod 7 radial rotating；
(6) kelly 141, coring tube 144, drill bit 145 are installed, described rig ox head 1 drives drilling tool inclined drilling big
In diameter bored concrete pile 15.
(7) drilling tool creeps into depth L of the length coring tube to core sample5Afterwards, stop drilling, after kelly stroke reaches K,
Above carry drilling tool 14 using rig hydraulic pressure, using the connection of ratchet spanner loose unloading kelly and driven drilling rod, then using rig
Ox head 1 low speed and large torque anti-converting dismantles kelly and driven drilling rod completely.Rig substructure screw mandrel 4 drives rig ox head 1 edge
Move after slide rail, drilling tool 14 is taken out by hoisting system 12, take out core sample.
(8) again being connected the drilling tool of appropriate length using hoist engine puts in boring, and screw mandrel 4 drives rig ox head 1
Along slide rail reach, connect kelly and driven drilling rod, start rig core boring sampling.
(9) repeat step (7), (8), until complete the core pulling sampling work of whole pile.
The present invention, by drill collar weight on driven drilling rod, changes the axis angle of boring, can be in less spatial decimation core
Sample, structure is little and simple, and operation is easy for installation, safe and reliable, can carry out the core pulling work of existing building bored concrete pile well
Make.
The other structures of system extracting core sample described in the present embodiment in existing building bored concrete pile are referring to prior art.
The above, be only presently preferred embodiments of the present invention, not the present invention is made with any pro forma restriction, therefore
Every any modification without departing from technical solution of the present invention content, according to the technical spirit of the present invention, above example made,
Equivalent variations and modification, all still fall within the range of technical solution of the present invention.
Claims (10)
1. a kind of complete set of equipments that large-section in-situ concrete pile under existing building is carried out with drilling core checking, including base, rig and volume
Raise system it is characterised in that：It is provided with drilling tool, described drilling tool includes kelly and for entering in boring on described rig
Driven drilling rod, coring tube and drill bit, described hoisting system includes pylon and the hoist engine being hinged on base；Set on described base
It is equipped with the governor motion adjusting its angle of inclination, described base both sides are provided with guide rail, described base is additionally provided with for moving
The base screw mandrel of dynamic rig, described base screw mandrel one end is connected with motor, and described base screw mandrel drives rig to slide along guide rail
Dynamic.
2. according to claim 1 large-section in-situ concrete pile under existing building is carried out with the complete set of equipments of drilling core checking, it is special
Levy and be:Screw rod that the regulating bolt hole that described governor motion includes being arranged on base is coordinated with regulating bolt hole and being used for
The retaining mechanism of tie down screw；The bottom of described screw rod is spheric end, and described screw rod bottom is provided with and the cooperation of described spheric end
Footing bearing, described footing bearing be provided with described spheric end cooperation indent spherical groove.
3. according to claim 2 large-section in-situ concrete pile under existing building is carried out with the complete set of equipments of drilling core checking, it is special
Levy and be：Described retaining mechanism include being arranged on base locking bed corresponding with regulating bolt hole and with the cooperation of described locking bed
Locking nut, described locking nut is provided with the installing hole installing screw rod, the installing hole of described screw rod and locking nut is joined
The one end closed is provided with locking plane, and matched with the section of screw rod in the section of described installing hole, described locking bed is provided with
Positioning tooth, described locking nut is provided with the fixing tooth with the positioning tooth cooperation of described locking bed, described locking nut is radially
It is provided with bolt hole, described bolt hole is provided with clamping screw.
4. under existing building according to any one of claims 1 to 3 large-section in-situ concrete pile carry out drilling core checking one-tenth sheathed
Standby it is characterised in that：Described rig is provided with slow-speed of revolution high torque anti-converting, is provided between described driven drilling rod and coring tube
Drill collar.
5. according to claim 4 large-section in-situ concrete pile under existing building is carried out with the complete set of equipments of drilling core checking, it is special
Levy and be：Described kelly length L3≤U-L'1-L2, during perforate, perforate coring tube length and the length of the bit sum L4≤L'1；
Each round trip drilling depth K≤U-L1-L2, when normally creeping into, described coring tube length L5>=K, described driven run of steel is to set
The integral multiple of footage per round trip during meter normal drilling, wherein U is working space height, L1For rig ox head top terrain clearance, L1'
For the height that rig ox head bottom is liftoff, L2For water inlet pipe and kelly joint distance.
6. according to claim 4 large-section in-situ concrete pile under existing building is carried out with the complete set of equipments of drilling core checking, it is special
Levy and be：Inclinator for testing rig vertical shaft inclination angle is provided with described base.
7. according to claim 5,6 any one to existing building under large-section in-situ concrete pile carry out drilling core checking one-tenth sheathed
Standby it is characterised in that：It is provided with circular bubble on described base.
8. a kind of usage right requires described in 3, large-section in-situ concrete pile under existing building is carried out with the complete set of equipments of drilling core checking
The method carrying out drilling core checking to large-section in-situ concrete pile under existing building, its step includes：
(1) rigging up, makes position of opening close proximity to the post (wall) above stake top, determines inclination alpha needed for boring, its maximum takes
It is worth and beWherein D is stake diameter, and d is the distance of drill center and stake side, and H is that stake is long, and h is cushion cap
Highly；
(2) so that base is horizontally disposed with, if now the initial tilt of kelly is θ, it is passing through the screw rod on adjusting base
The base longitudinal axis is along the projection θ in vertical plane1, by base transverse axis along the inclination angle in vertical plane be θ2；
(3) eliminate drilling tool in transverse axis along vertical plane angle theta2, inclinator is vertically placed on base and is located at described rig vertical shaft side
Position, the screw rod on adjusting base, until inclinator instruction kelly by base transverse axis along the inclination angle in vertical plane be 0；
Number of turns N of rotary support c screw rod2Can be estimated by formula：Wherein δ is screw rod rotation 1 circle
When the adjustable slanted angle of base cross shaft surface, X is the pitch of screw rod, and B is the distance between base transverse axis screw rod；
(4) eliminate drilling tool in the longitudinal axis along vertical plane angle theta1, and adjust kelly to required inclination alpha；Inclinator is transversely arranged in
Described rig vertical shaft front position, adjusting screw rod are located on base, until inclinator instruction kelly is by the base longitudinal axis
It is α along the inclination angle in vertical plane；Number of turns N of rotary screw1Can be estimated by formula：Wherein α
The maximum inclination angle of rig, β is the adjustable slanted angle in base longitudinal axis face during screw rod rotation 1 circle, and X is the pitch of screw rod, and L is bottom
The distance between screw rod before and after seat；
(5) to specifying after tilt angle alpha, locking nut is engaged fixation with base to adjustment kelly, and is locked by radial bolts
Tight screw rod；
(6) driven kelly, drill collar, coring tube and drill bit are installed, described rig drives the perfusion of drilling tool inclined drilling major diameter
In stake；
(7) depth L that it is coring tube to the length of core sample that drilling tool creeps into5Afterwards, stop drilling；Drilling tool is above carried by hoisting system, pine
Unload the connection of kelly and driven drilling rod, dismantle kelly and driven brill completely using rig low speed and large torque anti-converting
Bar；Rig substructure screw mandrel drives rig to move along after slide rail, and driven drilling rod is taken out by hoisting system, takes out core sample；
(8) again being connected the driven drilling rod of appropriate length using hoist engine puts in boring, and screw mandrel drives rig along slide rail
Reach, connects kelly and driven drilling rod, starts rig coring sample；
(9) repeat step (7), (8), until complete the core pulling sampling of whole pile.
9. the method carrying out drilling core checking to large-section in-situ concrete pile under existing building according to claim 8, its feature exists
In：In described step (5), described locking nut bottom is provided with fixing tooth, the position of described floor installation screw rod be provided with
The locking bed of the fixing tooth cooperation of locking nut.
10. the method carrying out drilling core checking to large-section in-situ concrete pile under existing building according to claim 8, its feature exists
In：Transverse axis is eliminated along vertical plane angle theta in described step (3)2, by hanging bearing b, adjust the screw rod of bearing c so that inclinator
Instruction kelly by base transverse axis along the inclination angle in vertical plane be 0；The longitudinal axis is eliminated along vertical plane angle in described step (4)
θ1, by hanging bearing b, adjust the screw rod of bearing a so that inclinator instruction kelly by the base longitudinal axis along along vertical plane
Inclination angle be α.
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| CN201410810548.2A CN104514488B (en) | 2014-12-19 | 2014-12-19 | Complete device and method for detecting drilling core of large-diameter bored pile under existing building |
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| CN201410810548.2A CN104514488B (en) | 2014-12-19 | 2014-12-19 | Complete device and method for detecting drilling core of large-diameter bored pile under existing building |
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| GB2204956B (en) * | 1987-05-23 | 1992-01-08 | George Cyril Brown | Method of determining the safe loading of floors |
| CN2049264U (en) * | 1989-04-27 | 1989-12-13 | 吴连才 | Multipurpose engineering drilling machine |
| CN2603187Y (en) * | 2002-12-26 | 2004-02-11 | 吉林大学 | Aluminium alloy light boring machine used in hilly area |
| CN101929167A (en) * | 2010-08-03 | 2010-12-29 | 浙江大学 | Ultrasonic side-hole detection method for detecting pile length |
| CN203742445U (en) * | 2014-02-26 | 2014-07-30 | 重庆宏工工程机械有限责任公司 | Vehicular hole-drilling core-drilling machine |
| CN203808894U (en) * | 2014-04-20 | 2014-09-03 | 泉州华大超硬工具科技有限公司 | Electric vertical core drilling rig |
| CN204457426U (en) * | 2014-12-19 | 2015-07-08 | 广州建设工程质量安全检测中心有限公司 | A kind of a complete set of equipment large-section in-situ concrete pile under existing building being carried out to drilling core checking |
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