CN104514488A - 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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- CN104514488A CN104514488A CN201410810548.2A CN201410810548A CN104514488A CN 104514488 A CN104514488 A CN 104514488A CN 201410810548 A CN201410810548 A CN 201410810548A CN 104514488 A CN104514488 A CN 104514488A
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- kelly
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- 238000005553 drilling Methods 0.000 title claims abstract description 100
- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000007246 mechanism Effects 0.000 claims abstract description 8
- 238000011065 in-situ storage Methods 0.000 claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 5
- 238000005070 sampling Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000013461 design Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000007665 sagging Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009430 construction management Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
-
- 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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- Earth Drilling (AREA)
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, be specifically related to a kind of a complete set of equipment and method of large-section in-situ concrete pile under existing building being carried out to drilling core checking.
Background technology
Due to following, need to detect the foundation of existing building:
(1) in the process of reform and opening-up rapid economic development, because of relatively lagging behind of planning construction management, many places occur formally not reporting the construction project built in a large number, need to carry out construction engineering test qualification and confirm;
(2) to transformation and the appraisal and evaluation of old building, due to historical reasons, data loss, foundation is in confused situation
(3) under the natural causes such as earthquake, typhoon, sea water intrusion and the effect of the human factor such as overload, ship collision, may there is deterioration, damage in basis, basis also needs to identify;
(4) some build up building soon, because ground problem causes superstructure to tilt, ftractures, need equally to re-start Testing and appraisal to its basis.
For the pile foundation under existing building, because it is connected with superstructure, working space is narrow and small, and current drilling equipment, as XY-1, XY-1A, the pile foundation under existing building completely cannot be drilled through due to constructional reason, Problems existing mainly contains: 1. for needing the rig opening gyrator, and position of opening generally can only reach about 60cm from the minimum distance of post (wall), cannot close to stake end face, even if rat holing, the complete core of whole pile also cannot be obtained; 2. for base sliding churn, although post (wall) can be pressed close to, due to post (wall) obstacle, the installation and removal of drilling rod cannot be completed; 3. bore angle control ability is inadequate, and for needing the situation of beating small angle inclination hole (with plumb line angle within 5 °), existing rig, owing to not having accurate leveling and measurement mechanism, cannot control required angle of inclination accurately.
Summary of the invention
The present invention is in order to solve existing building narrow space, be difficult to the technical problem of taking out complete castinplace pile core, a kind of adjustable-angle, inclined drilling be provided, a complete set of equipment and the method for large-section in-situ concrete pile under existing building being carried out to drilling core checking of complete core can be taken out at small space.
In order to solve the problem, the present invention is achieved by following technical scheme:
A complete set of equipment large-section in-situ concrete pile under existing building being carried out to drilling core checking of the present invention,
Comprise base, rig and hoisting system, it is characterized in that: described rig is provided with drilling tool, described drilling tool comprises kelly, some driven drilling rod, coring tube and the drill bit entered in boring, and described hoisting system comprises and is hinged on pylon on base and hoist engine; Described base is provided with the governor motion regulating its angle of inclination, described base both sides are provided with guide rail, described base is also provided with the base screw mandrel for mobile drill, described base screw mandrel one end is connected with drive motors, and described base screw mandrel drives rig along slide.
Further, described governor motion comprises the adjusting bolt hole be arranged on base, the screw rod coordinated with adjusting bolt hole and the retaining mechanism for tie down screw; The bottom of described screw rod is spheric end, is provided with the footing bearing coordinated with described spheric end bottom described screw rod, and described footing bearing settlement has the indent spherical groove coordinated with described spheric end.
Further, described retaining mechanism comprises the locking nut being arranged on locking bed corresponding with adjusting bolt hole on base and coordinating with described locking bed, described locking nut is provided with the installing hole installing screw rod, one end that described screw rod coordinates with the installing hole of locking nut is provided with locking plane, match with the cross section of screw rod in the cross section of described installing hole, described locking bed is provided with positioning tooth, described locking nut is provided with the fixed teeth coordinated with the positioning tooth of described locking bed, described locking nut radial direction is provided with bolt hole, described bolt hole is provided with lock bolt.
Further, described rig is provided with the slow-speed of revolution high torque reversal shelves, and described rig is vertical shaft type slewing drilling machine, drives drilling tool revolution.Be provided with drill collar between described driven drilling rod and drill bit, described coring tube is arranged on drill collar; Described kelly and driven drilling rod are by screwed connection, and described kelly is provided with through-core hole, described rig is also provided with water inlet pipe, described water inlet pipe is connected with the through-core hole of kelly.Drilling tool is under the Action of Gravity Field of drill collar, and drilling tool decentralization, thus make drill bit be against below hole wall, forces boring sagging, realizes bending creeping into.
Further, described kelly length L
3≤ U-L'
1-L
2, during perforate, perforate coring tube length and the length of the bit sum L
4≤ L'
1; Each round trip drilling depth K≤U-L
1-L
2, when normally creeping into, described coring tube length L
5>=K, described driven run of steel is design the integral multiple of footage per round trip when normally creeping into, and wherein U is working space height, L
1for rig ox head top terrain clearance, L
1' be height liftoff bottom rig ox head, L
2for water inlet pipe and kelly joint distance.
Further, described base is provided with inclinator, described inclinator is for detecting the angle of inclination of rig vertical shaft.
Further, described base is provided with circular bubble, for detecting the level of base.
Large-section in-situ concrete pile under existing building is carried out to a method for drilling core checking, comprising:
(1) rigging up, make the post (wall) of position of opening as far as possible above stake top, determine required inclination alpha of holing, its maximum occurrences is
wherein D is stake diameter, and d is the distance on drill center and stake limit, and H is that stake is long, and h is cushion cap height;
(2) screw rod on adjusting base, makes base be horizontally disposed with, if now the initial tilt of kelly is θ, its by the base longitudinal axis along the projection θ in vertical plane
1, being θ by base transverse axis along the inclination angle in vertical plane
2;
(3) drilling tool is eliminated at transverse axis along vertical plane angle theta
2, inclinator is vertically placed on base and is positioned at described rig vertical shaft lateral location, the screw rod on adjusting base, until inclinator instruction kelly is being 0 by base transverse axis along the inclination angle in vertical plane; The number of turns N of rotary support c screw rod
2estimate by formula:
base cross shaft surface adjustable slanted angle when wherein δ is screw rod rotation 1 circle, X is the pitch of screw rod, and B is the distance between base transverse axis screw rod;
(4) drilling tool is eliminated at the longitudinal axis along vertical plane angle theta
1, and adjust kelly to required inclination alpha; Inclinator is laterally placed on base and is positioned at described rig vertical shaft front position, adjusting screw(rod), until inclinator instruction kelly is being α by the base longitudinal axis along the inclination angle in vertical plane; The number of turns N of rotary screw
1estimate by formula:
the inclination angle that wherein rig of α is maximum, the adjustable slanted angle in base longitudinal axis face when β is screw rod rotation 1 circle, X is the pitch of screw rod, and L is the distance before and after base between screw rod;
(5), after adjusting kelly to appointment tilt angle alpha, locking nut is engaged fixing with base, and by radial bolts tie down screw;
(6) install driven kelly, coring tube and drill bit, described rig drives in drilling tool inclined drilling large-section in-situ concrete pile;
(7) drilling tool creeps into the length to core is the degree of depth L of coring tube
5after, stop creeping into; By hoisting system carries drilling tool, the connection of loose unloading kelly and driven drilling rod, uses rig low speed and large torque anti-converting to dismantle kelly and driven drilling rod completely; Rig substructure screw mandrel drives rig to move after slide rail, and driven drilling rod takes out by hoisting system, takes out core;
(8) utilize hoist engine again to be connected by the driven drilling rod of appropriate length and put into boring, screw mandrel drives rig to move forward along slide rail, connects kelly and driven drilling rod, starts rig and get core;
(9) repeat step (7), (8), until the sampling of loosing core completing whole pile.
Further, in described step (5), be provided with fixed teeth bottom described locking nut, the position of described floor installation screw rod is provided with the locking bed coordinated with the fixed teeth of locking nut.
Further, transverse axis is eliminated in described step (3) along vertical plane angle theta
2, by unsettled bearing b, regulate the screw rod of bearing c, make inclinator indicate kelly being 0 by base transverse axis along the inclination angle in vertical plane; The longitudinal axis is eliminated along vertical plane angle theta in described step (4)
1, by unsettled bearing b, regulate the screw rod of bearing a, make inclinator indicate kelly being α by the base longitudinal axis 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 regulate the angle of inclination of rig, the ball recess of footing bearing coordinates with stud base spheric end, to place strong adaptability, energy high accuracy regulates the angle of inclination of drilling rod, the application of base screw mandrel, rig is driven to move forward and backward along guide rail, make rig can fully near post (wall), be convenient to again load and unload drilling rod, tower height is adapted to the short spaces such as basement, use flexibly, narrow space can be adapted to, drilling rod angle and curved drilling rod is forced by drill collar weight, change the direction of boring, make the present invention also can complete the complete core of bored concrete pile foundation in short space to extract.Structure of the present invention is simple, operates easy for installation, safe and reliable, can carry out the extraction core work of existing building castinplace pile well.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail, wherein:
Fig. 1 is front view large-section in-situ concrete pile under existing building being carried out to a complete set of equipment of drilling core checking of the present invention;
Fig. 2 is top view large-section in-situ concrete pile under existing building being carried out to a complete set of equipment of drilling core checking of the present invention;
Fig. 3 is kelly inclination angle schematic diagram large-section in-situ concrete pile under existing building being carried out to a complete set of equipment of drilling core checking of the present invention;
Fig. 4 understructure schematic diagram large-section in-situ concrete pile under existing building being carried out to a complete set of equipment of drilling core checking of the present invention.
Fig. 5 is that drilling tool large-section in-situ concrete pile under existing building being carried out to a complete set of equipment of drilling core checking of the present invention bends schematic diagram;
Fig. 6 be of the present invention to large-section in-situ concrete pile under existing building carry out drilling core checking a complete set of equipment tilt time 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-fixed teeth, 62-bolt hole, 7-screw rod, 71-ball-type end, 72-locks plane, 8-footing bearing, concave sphere groove in 81-, 9-lock bolt, 10-inclinator, 11-circular bubble, 12-hoisting system, 13-wire rope, 14-drilling tool, 141-kelly, the driven drilling rod of 142-, 143-drill collar, 144-coring tube, 145-drill bit, 15-castinplace pile, 16-wall, 17-water inlet pipe.
Detailed description of the invention
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
As shown in Fig. 1 ~ Fig. 6, a complete set of equipment large-section in-situ concrete pile under existing building being carried out to drilling core checking of the present invention, comprise base 3, rig on the base 3 and hoisting system 12 are set, described hoisting system 12 comprises the hoist engine be arranged on rig and the pylon 2 be hinged on base, and the wire rope 13 of hoist engine is connected with the drilling tool 14 of rig by the fixed pulley on pylon 2.
Described rig is provided with the slow-speed of revolution high torque reversal shelves; Described rig is vertical shaft type slewing drilling machine, drives drilling tool revolution.
As shown in Figure 6, described drilling tool 14 comprises kelly 141, the some driven drilling rod 142 entered in boring, for increasing the drill collar 143 of drilling system deadweight, described drill collar 143 is connected with coring tube 144, described coring tube 144 is connected with drill bit 145, described kelly 141 passes through screwed connection with driven drilling rod 142, described kelly 141 is driven by described rig vertical shaft, described kelly 141 is provided with through-core hole, described rig is also provided with water inlet pipe 17, and described water inlet pipe 17 is connected with the through-core hole of kelly.At drill collar 143 under gravity, drilling tool decentralization, thus help under making drill bit be against hole wall, force boring sagging, realize bending creeping into.The length L of described kelly 141
3≤ U-L'
1-L
2, when perforate, described coring tube length and the length of the bit sum L
4≤ L'
1; Each round trip drilling depth K≤U-L
1-L
2, normally creep into when getting core, the length L of described coring tube
5>=K, described driven run of steel is design the integral multiple of footage per round trip when normally creeping into, and wherein U is working space height, L
1for rig ox head top terrain clearance, L
1' be height liftoff bottom rig ox head, L
2for water inlet pipe and kelly 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 comprises setting bolt hole on the base 3, the screw rod 7 coordinated with bolt hole and the retaining mechanism for standing screw 7, be spheric end 71 bottom described screw rod 7, its other end is provided with locking plane 72, its cross section is polygon, be provided with spherical with it 71 bottom described screw rod 7 and coordinate the footing bearing 8 installed, described footing bearing 8 is provided with the indent spherical groove 81 coordinated with screw rod 7 bottom hemispheric 71.
The locking nut 6 that described retaining mechanism comprises setting locking bed corresponding with bolt hole on the base 3 31 and coordinates with locking bed 31, described locking bed 31 is provided with positioning tooth, described locking nut 6 is provided with the fixed teeth 61 coordinated with positioning tooth, described locking nut 6 is provided with the installing hole passed through for screw rod, match with the cross section of screw rod 7 in the cross section of described installing hole, on described locking nut 6, radial direction is provided with bolt hole 62, bolt hole 62 is provided with lock bolt 9, the locking plane 72 of lock bolt 9 clamping screw 7, prevents screw rod 7 radial rotating.Owing to matching with screw rod 7 cross section in installing hole cross section, rotational lock nut 6 adjusting screw(rod) 7 rotates, thus makes base tilt or level, not during adjusting screw(rod), downward compact lock jack panel 6, makes fixed teeth 61 engage with the positioning tooth on locking bed 31, then by radial lock bolt 9 tie down screw 7.
Described base 3 is provided with guide rail 5, base 3 is also provided with base screw mandrel 4, base screw mandrel 4 is connected with drive motors, and base screw mandrel 4 is connected with rig ox head 1, and under the effect of drive motors, base screw mandrel 4 drives rig ox head 1 to move forward and backward along guide rail 5.
Described base 3 is also horizontally disposed with circular bubble 11, for detecting the level of base 3.
Described pylon 2 comprises support 21 and support bar 22, described support 21 one end is hingedly coupled to base 3, and the other end is provided with fixed pulley, and the two ends of described support 21 form the angle of 90 degree ~ 170 degree, described support bar 22 be articulated with base 3, the other end and support 21 hinged.
Large-section in-situ concrete pile under existing building is carried out to a method for drilling core checking, comprises the following steps:
(1) rigging up, makes the post (wall) of position of opening as far as possible above stake top, determines required inclination alpha maximum value of holing,
wherein D is stake diameter, and d is the distance on drill center and stake limit, and H is that stake is long, and h is cushion cap height, and for obtaining the complete core of whole pile, the angle should chosen close to max α is crept into, and when boring is positioned within an end face, then can reduce as one sees fit to creep into angle of inclination.
(2) each screw rod 7 on adjusting base, observes circular bubble 11 simultaneously, makes its bubble placed in the middle, thus reaches the object of leveling base, if now the initial tilt of kelly is θ, it is being θ by the inclination angle in base longitudinal axis vertical guide
1, being θ by the inclination angle in base transverse axis vertical guide
2.
(3) drilling tool 14 is first eliminated in transverse axis vertical guide angle theta
2, inclinator 10 is vertically placed in base and is positioned in rig vertical shaft lateral location, unsettled bearing b, regulate bearing c screw rod 7, until inclinator 10 indicates kelly being 0 by the inclination angle in base transverse axis vertical guide.The number of turns N of rotary support c screw rod
2estimate by formula:
base cross shaft surface adjustable slanted angle when wherein δ is screw rod rotation 1 circle, X is the pitch of screw rod, and B is the distance between base transverse axis screw rod.
(4) drilling tool is secondly eliminated in longitudinal axis vertical guide angle theta
1and adjust kelly 14 to required inclination alpha, inclinator 10 is laterally placed in base and is positioned on the position in rig vertical shaft front, unsettled bearing b, regulate bearing a screw rod 7, until inclinator 10 indicates kelly being α by the inclination angle in base longitudinal axis vertical guide.The number of turns N of rotary support a screw rod
1estimate by formula:
the inclination angle that wherein the rig ox head 1 of α is maximum, the adjustable slanted angle in base longitudinal axis face when β is screw rod rotation 1 circle, X is the pitch of screw rod 7, and L is the distance before and after base between screw rod.
(5) after adjusting kelly to appointment tilt angle alpha, by locking nut 6 tie down screw 7, fixed teeth 61 bottom locking nut 6 engages with the positioning tooth of locking bed 31, described locking nut 6 is provided with the installing hole for coordinating with screw rod 7, the cross section of this installing hole coordinates with screw rod 7 cross section, one end that described screw rod 7 coordinates with locking nut 6 is provided with locks plane 72, fixed teeth 61 is provided with bottom locking nut 6, described base 3 is provided with the locking bed 31 coordinated with fixed teeth 61, by the lock bolt 9 on locking nut 6 radial bolts hole 62, screw rod 7 is fixed, prevent screw rod 7 radial rotating,
(6) install kelly 141, coring tube 144, drill bit 145, described rig ox head 1 drives in drilling tool inclined drilling large-section in-situ concrete pile 15.
(7) drilling tool creeps into the degree of depth L of the length coring tube to core
5after, stop creeping into, after kelly stroke arrives K, use on rig hydraulic pressure and carry drilling tool 14, adopt the connection of ratchet spanner loose unloading kelly and driven drilling rod, then use rig ox head 1 low speed and large torque anti-converting to dismantle kelly and driven drilling rod completely.Rig substructure screw mandrel 4 drives rig ox head 1 to move after slide rail, and drilling tool 14 takes out by hoisting system 12, takes out core.
(8) utilize hoist engine again to be connected by the drilling tool of appropriate length and put into boring, screw mandrel 4 drives rig ox head 1 along slide rail reach, connects kelly and driven drilling rod, starts rig core boring sampling.
(9) repeat step (7), (8), until the sampling work of loosing core completing whole pile.
The present invention, by drill collar weight on driven drilling rod, changes the axis angle of boring, can at less spatial decimation core, and structure is little and simple, operates easy for installation, safe and reliable, can carry out the work of loosing core of existing building castinplace pile well.
Other structure of the system of core is extracted at existing building castinplace pile see prior art described in the present embodiment.
The above, it is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, therefore everyly do not depart from technical solution of the present invention content, the any amendment done above embodiment according to technical spirit of the present invention, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (10)
1. one kind is carried out a complete set of equipment of drilling core checking to large-section in-situ concrete pile under existing building, comprise base, rig and hoisting system, it is characterized in that: described rig is provided with drilling tool, described rig is provided with drilling tool, described drilling tool comprises kelly and for entering driven drilling rod, coring tube and the drill bit in boring, and described hoisting system comprises and is hinged on pylon on base and hoist engine; Described base is provided with the governor motion regulating its angle of inclination, described base both sides are provided with guide rail, described base is also provided with the base screw mandrel for mobile drill, described base screw mandrel one end is connected with drive motors, and described base screw mandrel drives rig along slide.
2. according to claim 1 large-section in-situ concrete pile under existing building is carried out to a complete set of equipment of drilling core checking, it is characterized in that: described governor motion comprises the adjusting bolt hole be arranged on base, the screw rod coordinated with adjusting bolt hole and the retaining mechanism for tie down screw; The bottom of described screw rod is spheric end, is provided with the footing bearing coordinated with described spheric end bottom described screw rod, and described footing bearing settlement has the indent spherical groove coordinated with described spheric end.
3. according to claim 2 large-section in-situ concrete pile under existing building is carried out to a complete set of equipment of drilling core checking, it is characterized in that: described retaining mechanism comprises the locking nut being arranged on locking bed corresponding with adjusting bolt hole on base and coordinating with described locking bed, described locking nut is provided with the installing hole installing screw rod, one end that described screw rod coordinates with the installing hole of locking nut is provided with locking plane, match with the cross section of screw rod in the cross section of described installing hole, described locking bed is provided with positioning tooth, described locking nut is provided with the fixed teeth coordinated with the positioning tooth of described locking bed, described locking nut radial direction is provided with bolt hole, described bolt hole is provided with lock bolt.
4. under existing building according to any one of claims 1 to 3, large-section in-situ concrete pile carries out a complete set of equipment of drilling core checking, it is characterized in that: described rig is provided with the slow-speed of revolution high torque reversal shelves, is provided with drill collar between described driven drilling rod and coring tube.
5. according to claim 4 large-section in-situ concrete pile under existing building is carried out to a complete set of equipment of drilling core checking, it is characterized in that: described kelly length L
3≤ U-L'
1-L
2, during perforate, perforate coring tube length and the length of the bit sum L
4≤ L'
1; Each round trip drilling depth K≤U-L
1-L
2, when normally creeping into, described coring tube length L
5>=K, described driven run of steel is design the integral multiple of footage per round trip when normally creeping into, and wherein U is working space height, L
1for rig ox head top terrain clearance, L
1' be height liftoff bottom rig ox head, L
2for water inlet pipe and kelly joint distance.
6. according to claim 4 large-section in-situ concrete pile under existing building being carried out to a complete set of equipment of drilling core checking, it is characterized in that: described base being provided with the inclinator for testing rig vertical shaft inclination angle.
7. large-section in-situ concrete pile under existing building is carried out to a complete set of equipment of drilling core checking according to any one of claim 1 to 6, it is characterized in that: described base is provided with circular bubble.
8. large-section in-situ concrete pile under existing building is carried out to a method for drilling core checking, its step comprises:
(1) rigging up, make the post (wall) of position of opening as far as possible above stake top, determine required inclination alpha of holing, its maximum occurrences is
wherein D is stake diameter, and d is the distance on drill center and stake limit, and H is that stake is long, and h is cushion cap height;
(2) screw rod on adjusting base, makes base be horizontally disposed with, if now the initial tilt of kelly is θ, its by the base longitudinal axis along the projection θ in vertical plane
1, being θ by base transverse axis along the inclination angle in vertical plane
2;
(3) drilling tool is eliminated at transverse axis along vertical plane angle theta
2, inclinator is vertically placed on base and is positioned at described rig vertical shaft lateral location, the screw rod on adjusting base, until inclinator instruction kelly is being 0 by base transverse axis along the inclination angle in vertical plane; The number of turns N of rotary support c screw rod
2estimate by formula:
base cross shaft surface adjustable slanted angle when wherein δ is screw rod rotation 1 circle, X is the pitch of screw rod, and B is the distance between base transverse axis screw rod;
(4) drilling tool is eliminated at the longitudinal axis along vertical plane angle theta
1, and adjust kelly to required inclination alpha; Inclinator is laterally placed on base and is positioned at described rig vertical shaft front position, adjusting screw(rod), until inclinator instruction kelly is being α by the base longitudinal axis along the inclination angle in vertical plane; The number of turns N of rotary screw
1estimate by formula:
the inclination angle that wherein rig of α is maximum, the adjustable slanted angle in base longitudinal axis face when β is screw rod rotation 1 circle, X is the pitch of screw rod, and L is the distance before and after base between screw rod;
(5), after adjusting kelly to appointment tilt angle alpha, locking nut is engaged fixing with base, and by radial bolts tie down screw;
(6) install driven kelly, drill collar, coring tube and drill bit, described rig drives in drilling tool inclined drilling large-section in-situ concrete pile;
(7) drilling tool creeps into the length to core is the degree of depth L of coring tube
5after, stop creeping into; By hoisting system carries drilling tool, the connection of loose unloading kelly and driven drilling rod, uses rig low speed and large torque anti-converting to dismantle kelly and driven drilling rod completely; Rig substructure screw mandrel drives rig to move after slide rail, and driven drilling rod takes out by hoisting system, takes out core;
(8) utilize hoist engine again to be connected by the driven drilling rod of appropriate length and put into boring, screw mandrel drives rig to move forward along slide rail, connects kelly and driven drilling rod, starts rig and get core;
(9) repeat step (7), (8), until the sampling of loosing core completing whole pile.
9. according to Claim 8 large-section in-situ concrete pile under existing building is carried out to the method for drilling core checking, it is characterized in that: in described step (5), be provided with fixed teeth bottom described locking nut, the position of described floor installation screw rod is provided with the locking bed coordinated with the fixed teeth of locking nut.
10. according to Claim 8 large-section in-situ concrete pile under existing building is carried out to the method for drilling core checking, it is characterized in that: eliminate transverse axis in described step (3) along vertical plane angle theta
2, by unsettled bearing b, regulate the screw rod of bearing c, make inclinator indicate kelly being 0 by base transverse axis along the inclination angle in vertical plane; The longitudinal axis is eliminated along vertical plane angle theta in described step (4)
1, by unsettled bearing b, regulate the screw rod of bearing a, make inclinator indicate kelly being α by the base longitudinal axis along the inclination angle in vertical plane.
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| CN112943136A (en) * | 2021-02-20 | 2021-06-11 | 中国铁建重工集团股份有限公司 | Core taking mechanism and core taking method |
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