CN117052294A - Novel multi-shaft pore-forming pile improved construction equipment and construction method thereof - Google Patents
Novel multi-shaft pore-forming pile improved construction equipment and construction method thereof Download PDFInfo
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- CN117052294A CN117052294A CN202311055130.0A CN202311055130A CN117052294A CN 117052294 A CN117052294 A CN 117052294A CN 202311055130 A CN202311055130 A CN 202311055130A CN 117052294 A CN117052294 A CN 117052294A
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- 238000010276 construction Methods 0.000 title claims abstract description 50
- 239000002002 slurry Substances 0.000 claims abstract description 44
- 238000000227 grinding Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 15
- 238000005553 drilling Methods 0.000 claims description 13
- 230000002787 reinforcement Effects 0.000 claims description 7
- 239000002893 slag Substances 0.000 claims description 7
- 238000004140 cleaning Methods 0.000 claims description 6
- 239000011148 porous material Substances 0.000 claims description 5
- 230000036346 tooth eruption Effects 0.000 claims description 5
- 230000001681 protective effect Effects 0.000 claims description 4
- 239000013049 sediment Substances 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000009933 burial Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000011241 protective layer Substances 0.000 claims description 3
- 239000002689 soil Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 238000000151 deposition Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/002—Drilling with diversely driven shafts extending into the borehole
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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
- 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
- E21B15/003—Supports for the drilling machine, e.g. derricks or masts adapted to be moved on their substructure, e.g. with skidding means; adapted to drill a plurality of wells
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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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1078—Stabilisers or centralisers for casing, tubing or drill pipes
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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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
-
- 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
- E21B3/00—Rotary drilling
- E21B3/02—Surface drives for rotary drilling
- E21B3/022—Top drives
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses novel multi-shaft hole-forming pile improved construction equipment and a construction method thereof, which belong to the field of building pile foundation paving, and the novel multi-shaft hole-forming pile improved construction equipment comprises a support, wherein three hydraulic rotary power heads are fixedly arranged in the middle of the support at equal intervals, a slurry pipe is fixedly arranged at the lower end of the hydraulic rotary power heads, a square centralizer is sleeved outside the lower end of the slurry pipe, the lower end of the slurry pipe is fixedly connected with an eccentric rotator, the lower end of the eccentric rotator is fixedly connected with a Lerlo drill bit, the outer end of the middle of the slurry pipe is sleeved with a grinding disc, one end of the hydraulic rotary power head, which is far away from the slurry pipe, is fixedly connected with a winch, and the upper end of the slurry pipe is fixedly connected with a slurry pump.
Description
Technical Field
The invention relates to the field of building pile foundation laying, in particular to novel multi-shaft hole-forming pile improved construction equipment and a construction method thereof.
Background
Along with the development of modern engineering construction, the building height and the depth of underground space are continuously increased, pile foundations and enclosure engineering are also continuously developed, and the pore-forming piles and pore-forming walls are widely applied to foundation and foundation pit engineering.
For deep foundation pit, because precast pile is limited by factors such as pile length, pile extension and pile pressing force, single pile bearing capacity can not meet the requirements required by building structural design, so that a large-scale building deep foundation adopts a bored pile as an engineering pile, a bored pile or even an underground continuous wall can be adopted as a guard pile, a horizontal support lower upright pile in a pit also often adopts the form of the bored pile, but the form of the bored pile is circular, mainly because a drill bit rotates concentrically along with a drill bit, and then a circular bored pile hole is drilled, a large gap exists between the circular bored pile holes, and the bearing capacity formed by a plurality of bored piles is reduced.
The underground diaphragm wall is particularly high in construction cost, triaxial groove wall reinforcement and the like are required to be constructed in advance, the tonnage of mechanical equipment such as a grooving machine, a crawler crane and the like is large, the foundation bearing capacity of an engineering site is difficult to ensure that the machine walks stably in the site, grooving and hoisting construction are performed under the condition of ensuring strict perpendicularity requirements, the large-scale equipment is required to walk on a road for construction in the process of constructing before the large-tonnage machine enters the site, the construction machine is or is a preparation measure before the formal underground diaphragm wall construction, the cost is huge, more engineering construction sites are tense, the condition that the construction space of the large-scale construction machine is insufficient occurs is caused, and the arrangement of the construction site machinery is disordered, and the construction progress is slow.
Disclosure of Invention
1. Technical problem to be solved
Aiming at the problems existing in the prior art, the invention aims to provide novel multi-shaft hole-forming pile improved construction equipment and a construction method thereof, which can realize the mode that a plurality of Lelo drills rotate in a small eccentric way and simultaneously drill holes, so that the shape of the filling holes is square, the gaps among the filling holes are reduced, the bearing capacity of the filling piles is improved, and the working efficiency is improved.
2. Technical proposal
In order to solve the problems, the invention adopts the following technical scheme.
The utility model provides a novel multiaxis pore-forming stake improves construction equipment, which comprises a bracket, support middle part equidistance fixed mounting has three hydraulic pressure rotary power head, hydraulic pressure rotary power head lower extreme fixed mounting has the mud pipe, square centralizer has been cup jointed to mud pipe lower extreme outside, mud pipe lower extreme fixedly connected with eccentric gyrator, eccentric gyrator lower extreme fixedly connected with luxuriant head, the mill has been cup jointed to mud pipe middle part outer end, the one end fixedly connected with hoist engine of mud pipe is kept away from to hydraulic pressure rotary power head, the one end that the mud pipe was kept away from to the mud pump is connected with the mud pit, the mud pipe outside is located square centralizer upper side and is connected with a protective cylinder, rotates with little decentered through luxuriant head to and the mode that a plurality of luxuriant heads bore simultaneously for the pouring hole shape is square, reduces the space between the pouring hole, improves a plurality of pouring bearing capacity, improves work efficiency.
Further, the square centralizer comprises a main frame body, a plurality of keels are fixedly connected to the middle of the main frame body, and bearings are fixedly connected to the middle of the main frame body, so that the square centralizer is not easy to damage.
Further, the eccentric gyrator comprises a shell, the upper end and the lower end of the shell are fixedly connected with a flow guide pipe, the lower end of the flow guide pipe positioned at the upper end of the shell is fixedly connected with a pulp suction pipe, the upper end of the flow guide pipe positioned at the lower end of the shell is fixedly connected with a pulp discharge pipe, the lower end of the shell is provided with a blanking port, and the lower end of the blanking port is detachably connected with a baffle plate, so that the Lerlow drill bit can do eccentric gyration.
Further, the Lelo drill comprises a hollow drill, the upper end of the hollow drill is fixedly connected with a drill rod, the outer end of the drill rod is fixedly connected with three wing plates at equal angles, one end of each wing plate, which is far away from the drill rod, is fixedly connected with a guide ring, and the lower end of the guide ring is fixedly connected with three rows of side cutting teeth at equal angles, so that the Lelo drill can drill the ground.
Further, the hydraulic rotary power head comprises a hydraulic cylinder, the lower end of the hydraulic cylinder is fixedly connected with a lower rotary head, the upper part of the outer end of the hydraulic cylinder is fixedly connected with an oil passing port, the middle part of the oil passing port is fixedly connected with an oil pipe, the lower part of the outer end of the hydraulic cylinder is fixedly connected with a hydraulic distributor, so that the slurry pipe can rotate, and the hydraulic rotary power head drives the Lelo drill bit to rotate through the slurry pipe.
Further, the bearing is sleeved on the outer side of the Lorentz bit, and the square centralizer sinks along with the Lorentz bit, so that the square centralizer cannot rotate along with the Lorentz bit, and the square centralizer can control the Lorentz bit to drill and not easily deviate.
Further, the pulp suction pipe is located at the center of the upper end of the shell, the pulp discharge pipe is located at the middle eccentric position of the lower end of the shell, and the flange plates are arranged at the ends, far away from the shell, of the flow guide pipes, so that the Lo drill bit can do eccentric rotary motion, and the flange plates can be used for connecting the Lo drill bit with the eccentric gyrator.
Furthermore, the edge of the guide ring is in a Lorentz shape, and the hollow drill bit shell is detached, so that a square hole can be drilled when the Lorentz drill bit rotates in a small eccentric manner, and the hollow drill bit can be replaced.
Further, the shape of the pile casing is square, and the wall thickness of the pile casing is 20mm, so that the pile casing can enter a hole drilled by the Lelo drill bit, and the pile casing can support the inner wall of the hole.
A construction method based on the improved construction equipment of the multi-shaft hole-forming pile according to any one of the claims, which is characterized in that: the method comprises the following steps:
s1: compacting and leveling the field, installing three hydraulic rotary power heads (11) in the middle of a bracket (5), measuring and lofting pile positions by adopting a crisscross method, rechecking, driving positioning steel bars, burying a pile casing (10), and setting a mud pit (9) and an earthwork stacking area;
s2, installing equipment at a specific position for drilling operation, and simultaneously controlling the verticality of the bored pile to be between 1/200 and 1/100, wherein the square centralizer (2) ensures that the Lelo drill bit (4) is not easy to deviate in the downward drilling process;
s3, cleaning holes for the first time by using a drill rod (402), replacing old mud in the holes by using new mud with a certain proportion and mud proportion of 1.05-1.20, sucking out bottom drilling slag on the ground surface by using a conventional vacuum pump through a hollow pore canal system formed by the drill rod, an eccentric rotator and the inside of a drill bit, and collecting the bottom drilling slag into a ground surface mud pool 9;
s4, sinking the reinforcement cage to the designed elevation, then carrying out hole-entering fixation, ensuring the thickness requirement of the protective layer, falling the broken soil on the hole wall in the process of lowering the reinforcement cage, depositing sediment at the bottom, and carrying out hole-cleaning operation for the second time through a guide pipe;
s5: the concrete pouring time is not longer than the initial setting time of the first batch of concrete, the burial depth of the guide pipe is 2-6m, the superfilling height is 0.8-1.0m, the pile body pouring filling coefficient is preferably greater than 1.1, and meanwhile, the initial pouring amount is used for simultaneously manufacturing a concrete test block during concrete pouring;
s6: after pouring, the pile casing 10 at the position of the orifice and the like can be recycled, and the pile casing part above the ground is removed after the concrete strength reaches 5 MPa.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
(1) According to the scheme, the Lelo drill bit rotates in a small eccentric mode, and the Lelo drill bits drill holes simultaneously, so that the shape of the filling holes is square, gaps among the filling holes are reduced, the bearing capacity of a plurality of filling piles is improved, and the working efficiency is improved.
(2) The square centralizer comprises a main frame body, wherein the middle part of the main frame body is fixedly connected with a plurality of keels, and the middle part of the main frame body is fixedly connected with a bearing, so that the square centralizer is not easy to damage.
(3) The eccentric gyrator comprises a shell, the upper end and the lower end of the shell are fixedly connected with guide pipes, the lower end of each guide pipe positioned at the upper end of the shell is fixedly connected with a pulp suction pipe, the upper end of each guide pipe positioned at the lower end of the shell is fixedly connected with a pulp discharge pipe, the lower end of the shell is provided with a blanking port, and the lower end of each blanking port is detachably connected with a baffle plate, so that the Lelo drill bit can perform eccentric rotary motion.
(4) The Lelo drill bit comprises a hollow drill bit, the upper end of the hollow drill bit is fixedly connected with a drill rod, the outer end of the drill rod is fixedly connected with three wing plates at equal angles, one end of each wing plate, which is far away from the drill rod, is fixedly connected with a guide ring, the lower end of the guide ring is fixedly connected with three rows of side cutting teeth at equal angles, and therefore the Lelo drill bit can drill the ground.
(5) The hydraulic rotary power head comprises a hydraulic cylinder, the lower end of the hydraulic cylinder is fixedly connected with a lower rotary head, the upper part of the outer end of the hydraulic cylinder is fixedly connected with an oil passing port, the middle part of the oil passing port is fixedly connected with an oil pipe, the lower part of the outer end of the hydraulic cylinder is fixedly connected with a hydraulic distributor, the slurry pipe can rotate, and the hydraulic rotary power head drives the Lerlo drill bit to rotate through the slurry pipe.
(6) The bearing is sleeved on the outer side of the Lorentz bit, and the square centralizer sinks along with the Lorentz bit, so that the square centralizer cannot rotate along with the Lorentz bit, and the square centralizer can control the Lorentz bit to drill and not easily deviate.
(7) The pulp suction pipe is positioned at the center of the upper end of the shell, the pulp discharge pipe is positioned at the middle eccentric position of the lower end of the shell, and the flange plates are arranged at the ends, far away from the shell, of the flow guide pipes, so that the Lo drill bit can do eccentric rotary motion, and the flange plates can be used for connecting the Lo drill bit with the eccentric rotary device.
(8) The edge of the guide ring is in a Lorentz shape, and the hollow drill bit shell is detached, so that a square hole can be drilled when the Lorentz drill bit rotates in a small eccentric manner, and the hollow drill bit can be replaced.
(9) The shape of the pile casing is square, and the wall thickness of the pile casing is 20mm, so that the pile casing can enter a hole drilled by the Lelo drill bit, and the pile casing can support the inner wall of the hole.
Drawings
FIG. 1 is an overall perspective view of the present invention;
FIG. 2 is an overall front view of the present invention;
FIG. 3 is a schematic diagram of the operation of the Lo bit of the present invention;
FIG. 4 is a perspective view of a hydraulic rotary power head of the present invention;
FIG. 5 is a perspective view of the main structure of the present invention;
FIG. 6 is a perspective view of a square centralizer of the invention;
FIG. 7 is a perspective view of an eccentric gyrator of the present invention;
FIG. 8 is a semi-sectional perspective view of an eccentric gyrator of the present invention;
FIG. 9 is a perspective view of a Lolo bit according to the present invention;
fig. 10 is a perspective view of the shaft side of the lero bit of the present invention.
The reference numerals in the figures illustrate:
1. a slurry pipe; 2. a square centralizer; 201. a main frame; 202. a keel; 203. a bearing; 3. an eccentric gyrator; 301. a housing; 302. an eccentric gyrator; 303. a flange plate; 4. a luxury drill bit; 401. a hollow drill bit; 402. a drill rod; 403. a wing plate; 404. a guide ring; 405. side cutting teeth; 5. a bracket; 6. grinding disc; 7. a hoist; 8. a slurry pump; 9. a slurry pool; 10. a protective barrel; 11. a hydraulic rotary power head; 1101. a hydraulic cylinder; 1102. a lower swivel; 1103. an oil port is crossed; 1104. an oil pipe; 1105. a hydraulic distributor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments, and that all other embodiments obtained by persons of ordinary skill in the art without making creative efforts based on the embodiments in the present invention are within the protection scope of the present invention.
In the description of the present invention, it should be noted that the positional or positional relationship indicated by the terms such as "upper", "lower", "inner", "outer", "top/bottom", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "configured to," "engaged with," "connected to," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of the element of the adapting model. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1-10, a novel multi-shaft hole forming pile improvement construction device comprises a support 5, three hydraulic rotary power heads 11 are fixedly arranged in the middle of the support 5 at equal intervals, a slurry pipe 1 is fixedly arranged at the lower end of the hydraulic rotary power heads 11, a square centralizer 2 is sleeved outside the lower end of the slurry pipe 1, an eccentric gyrator 3 is fixedly connected with the lower end of the slurry pipe 1, a Lerlo drill bit 4 is fixedly connected with the lower end of the eccentric gyrator 3, a grinding disc 6 is sleeved outside the middle of the slurry pipe 1, a winch 7 is fixedly connected with one end of the hydraulic rotary power heads 11, which is far away from the slurry pipe 1, a slurry pump 8 is fixedly connected with one end, which is far away from the slurry pipe 1, of the slurry pump 8, a slurry pool 9 is connected with one end, which is far away from the slurry pipe 1, of the slurry pipe 1, and a protective cylinder 10 is slidingly connected on the upper side of the square centralizer 2.
Referring to fig. 2-6, the square centralizer 2 includes a main frame 201, a plurality of keels 202 are fixedly connected to the middle part of the main frame 201, and bearings 203 are fixedly connected to the middle part of the main frame 201, so that the square centralizer 2 is not easy to damage. The eccentric gyrator 3 comprises a shell 301, the upper end and the lower end of the shell 301 are fixedly connected with a flow guide pipe 302, the lower end of the flow guide pipe 302 positioned at the upper end of the shell 301 is fixedly connected with a pulp suction pipe 303, the upper end of the flow guide pipe 302 positioned at the lower end of the shell 301 is fixedly connected with a pulp discharge pipe 304, the lower end of the shell 301 is provided with a blanking port 305, and the lower end of the blanking port 305 is detachably connected with a baffle 306, so that the Lerlo drill bit can perform eccentric rotary motion.
Referring to fig. 4-7, the luxury drill 4 includes a hollow drill 401, a drill rod 402 is fixedly connected to the upper end of the hollow drill 401, three wings 403 are fixedly connected to the outer end of the drill rod 402 at equal angles, a pilot ring 404 is fixedly connected to one end of the wings 403 away from the drill rod 402, and three rows of side cutting teeth 405 are fixedly connected to the lower end of the pilot ring 404 at equal angles, so that the luxury drill 4 can drill the ground. The hydraulic rotary power head 11 comprises a hydraulic cylinder 1101, the lower end of the hydraulic cylinder 1101 is fixedly connected with a lower rotary head 1102, the upper part of the outer end of the hydraulic cylinder 1101 is fixedly connected with an oil passing port 1103, the middle part of the oil passing port 1103 is fixedly connected with an oil pipe 1104, the lower part of the outer end of the hydraulic cylinder 1101 is fixedly connected with a hydraulic distributor 1105, so that the slurry pipe 1 can rotate, and the hydraulic rotary power head 11 drives the Lerlo drill bit 4 to rotate through the slurry pipe 1.
Referring to fig. 5-8, the bearing 203 is sleeved on the outer side of the luxuriant drill bit 4, and the square centralizer 2 sinks along with the luxuriant drill bit 4, so that the square centralizer 2 cannot rotate along with the luxuriant drill bit 4, and the square centralizer 2 can control the luxuriant drill bit 4 to drill and not easily deviate. The pulp suction pipe 303 is located at the center of the upper end of the shell 301, the pulp discharge pipe 304 is located at the middle eccentric position of the lower end of the shell 301, and flanges are mounted at the ends, far away from the shell 301, of the flow guide pipes 302, so that the Lo drill bit can perform eccentric rotary motion, and the flanges can connect the Lo drill bit with the eccentric rotary device 3.
Referring to fig. 3-7, the edge of the pilot ring 404 is in the shape of a lux triangle, and the casing of the hollow drill 401 is disassembled, so that the square hole can be drilled when the lux drill 4 rotates slightly eccentrically, and the hollow drill 401 can be replaced. The shape of the casing 10 is square, and the wall thickness of the casing 10 is 20mm, so that the casing 10 can enter the hole drilled by the Lerlo bit 4, and the casing 10 can support the inner wall of the hole.
During construction, a flat site is compacted, construction quality and perpendicularity requirements of a pile driver are guaranteed, then a crisscross method is adopted for pile position measurement and lofting, positioning steel bars are driven in, a pile casing 10 is buried, the pile casing 10 has the functions of preventing orifice collapse and poor stratum area hole collapse, a mud pit 9 and a temporary hole forming earthwork stacking area are arranged, and equipment is installed at a proper position to be drilled.
The verticality of a bored pile is controlled in the drilling and pore-forming process, the hydraulic rotary power head 11 is opened, the lower rotary head 1102 drives the slurry pipe 1 to rotate, the slurry pipe 1 drives the eccentric gyrator 3 to rotate so that the Lelo bit 4 rotates to drill, the square centralizer 2 enables the Lelo bit 4 to shift difficultly in the downward drilling process, the drill rod 402 is utilized for carrying out primary pore cleaning, and old slurry in the pore is replaced by adopting a certain proportion of newly-prepared slurry with the specific gravity of 1.05-1.20. The positive circulation construction process comprises the following steps: the mud has certain slag carrying capacity, new mud is continuously input, old mud in the original holes carries bottom sediment to flow upwards, and finally the old mud is collected into a mud pit 9 on the ground; the reverse circulation construction process comprises the following steps: the bottom drilling slag is sucked out of the ground surface through a hollow pore canal system formed by a drill rod, an eccentric rotator and the inside of a drill bit by using a conventional vacuum pump, so that the drilling slag is collected into a ground surface mud pit 9, when mud in a drilling hole is sucked out, a mud discharging pipe 304 sucks the mud out, the mud is filled in the shell 301, larger impurities in the mud sink into the bottom of the shell 301, the mud sucking pipe 303 sucks out the mud in the shell 301, the mud sucking pipe 303 and the mud pipe 1 are not easy to be blocked, a baffle 306 is detached from the lower end of the shell 301 after construction is completed, and the larger impurities in the shell 301 are cleaned out.
The reinforcement cage is sunk to the designed elevation and then is fixed through an access hole, the thickness requirement of a protective layer is ensured, in the process of lowering the reinforcement cage, the broken soil on the hole wall falls, the sediment at the bottom is deposited, the secondary hole cleaning operation is carried out through a guide pipe, the underwater concrete pouring is required to be completed in a specified time, the pouring time is not longer than the initial setting time of the first concrete, the burial depth of the guide pipe is 2-6m, the over-pouring height is 0.8-1.0m, the filling coefficient of pile body pouring is preferably greater than 1.1, and meanwhile, the initial pouring amount is simultaneously used for manufacturing a concrete test block during the concrete pouring; after pouring, the pile casing 10 at the position of the orifice and the like can be recycled, and the pile casing part above the ground can be removed after the concrete strength reaches 5 MPa.
After 7 days of completion of pouring, post-grouting operation may be performed, and the grouting operation is terminated when the total grouting amount is 2.5t and the grouting pressure reaches 2 to 3MPa or when the total grouting amount reaches 80% of the designed total grouting amount.
The hole arrangement effects of different structural forms, such as an 'H' -shape, can be formed by the arrangement and combination of the three Lerlow drill bits 4. The mode that the plurality of the Lo drill bits 4 are rotated in a small eccentric mode and the plurality of the Lo drill bits 4 are drilled simultaneously can be realized, so that the shape of the pouring holes is square, gaps among the pouring holes are reduced, the bearing capacity of a plurality of pouring piles is improved, and the working efficiency is improved.
The above description is only of the preferred embodiments of the present invention; the scope of the invention is not limited in this respect. Any person skilled in the art, within the technical scope of the present disclosure, may apply to the present invention, and the technical solution and the improvement thereof are all covered by the protection scope of the present invention.
Claims (10)
1. Novel multiaxis pore-forming stake improves construction equipment, including support (5), its characterized in that: three hydraulic rotary power heads (11) are fixedly arranged in the middle of the support (5) at equal intervals, a slurry pipe (1) is fixedly arranged at the lower end of the hydraulic rotary power heads (11), a square centralizer (2) is sleeved outside the lower end of the slurry pipe (1), an eccentric rotator (3) is fixedly connected with the lower end of the slurry pipe (1), a Lerlo drill bit (4) is fixedly connected with the lower end of the eccentric rotator (3), a grinding disc (6) is sleeved at the outer end of the middle of the slurry pipe (1), a winch (7) is fixedly connected with one end of the hydraulic rotary power heads (11) away from the slurry pipe (1), a slurry pump (8) is fixedly connected with one end of the slurry pipe (1), and a slurry tank (9) is connected with one end of the slurry pump (8) away from the slurry pipe (1), and the outer side of the slurry pipe (1) is positioned above the square centralizer (2) and is laterally connected with a protective cylinder (10).
2. The novel multi-shaft hole-forming pile improved construction equipment according to claim 1, wherein: the square centralizer (2) comprises a main frame body (201), wherein a plurality of keels (202) are fixedly connected to the middle of the main frame body (201), and bearings (203) are fixedly connected to the middle of the main frame body (201).
3. The novel multi-shaft hole-forming pile improved construction equipment according to claim 1, wherein: the eccentric gyrator (3) comprises a shell (301), the upper end and the lower end of the shell (301) are fixedly connected with a flow guide pipe (302), the lower end of the flow guide pipe (302) positioned at the upper end of the shell (301) is fixedly connected with a pulp suction pipe (303), the upper end of the flow guide pipe (302) positioned at the lower end of the shell (301) is fixedly connected with a pulp discharge pipe (304), the lower end of the shell (301) is provided with a blanking port (305), and the lower end of the blanking port (305) is detachably connected with a baffle (306).
4. The novel multi-shaft hole-forming pile improved construction equipment and the construction method thereof according to claim 1, wherein: the novel steering gear comprises a steering gear body and is characterized in that the steering gear body (4) comprises a hollow drill bit (401), the upper end of the hollow drill bit (401) is fixedly connected with a drill rod (402), the outer end of the drill rod (402) is fixedly connected with three wing plates (403), one end, far away from the drill rod (402), of each wing plate (403) is fixedly connected with a guide ring (404), and the lower end of each guide ring (404) is fixedly connected with three rows of side cutting teeth (405) at equal angles.
5. The novel multi-shaft hole-forming pile improved construction equipment and the construction method thereof according to claim 1, wherein: the hydraulic rotary power head (11) comprises a hydraulic cylinder (1101), the lower end of the hydraulic cylinder (1101) is fixedly connected with a lower rotary head (1102), the upper part of the outer end of the hydraulic cylinder (1101) is fixedly connected with an oil passing port (1103), the middle part of the oil passing port (1103) is fixedly connected with an oil pipe (1104), and the lower part of the outer end of the hydraulic cylinder (1101) is fixedly connected with a hydraulic distributor (1105).
6. The novel multi-shaft hole-forming pile improved construction equipment and the construction method thereof according to claim 2, wherein: the bearing (203) is sleeved on the outer side of the Lelo drill bit (4), and the square centralizer (2) sinks along with the Lelo drill bit (4).
7. The improved construction equipment for the novel multi-shaft hole-forming pile and the construction method thereof according to claim 3, wherein the improved construction equipment is characterized in that: the slurry suction pipe (303) is positioned at the central position of the upper end of the shell (301), the slurry discharge pipe (304) is positioned at the middle eccentric position of the lower end of the shell (301), and the flange plates are arranged at one ends of the guide pipes (302) far away from the shell (301).
8. The novel multi-shaft hole-forming pile improved construction equipment and the construction method thereof according to claim 4, wherein the construction equipment is characterized in that: the edge shape of the guide ring (404) is a Lorentz triangle, and the shell of the hollow drill bit (401) is disassembled.
9. The novel multi-shaft hole-forming pile improved construction equipment and the construction method thereof according to claim 1, wherein: the shape of the pile casing (10) is square, and the wall thickness of the pile casing (10) is 20mm.
10. A construction method based on the improved construction equipment of the multi-shaft hole-forming pile according to any one of claims 1 to 9, characterized in that: the method comprises the following steps:
s1: compacting and leveling the field, installing three hydraulic rotary power heads (11) in the middle of a bracket (5), measuring and lofting pile positions by adopting a crisscross method, rechecking, driving positioning steel bars, burying a pile casing (10), and setting a mud pit (9) and an earthwork stacking area;
s2, installing equipment at a specific position for drilling operation, and simultaneously controlling the verticality of the bored pile to be between 1/200 and 1/100, wherein the square centralizer (2) ensures that the Lelo drill bit (4) is not easy to deviate in the downward drilling process;
s3, cleaning holes for the first time by using a drill rod (402), replacing old mud in the holes by using new mud with a certain proportion and mud proportion of 1.05-1.20, sucking out bottom drilling slag on the ground surface by using a conventional vacuum pump through a hollow pore canal system formed by the drill rod, an eccentric rotator and the inside of a drill bit, and collecting the bottom drilling slag into a ground surface mud pool (9);
s4, sinking the reinforcement cage to the designed elevation, then carrying out hole-entering fixation, ensuring the thickness requirement of the protective layer, falling the broken soil on the hole wall in the process of lowering the reinforcement cage, depositing sediment at the bottom, and carrying out hole-cleaning operation for the second time through a guide pipe;
s5: the concrete pouring time is not longer than the initial setting time of the first batch of concrete, the burial depth of the guide pipe is 2-6m, the superfilling height is 0.8-1.0m, the pile body pouring filling coefficient is preferably greater than 1.1, and meanwhile, the initial pouring amount is used for simultaneously manufacturing a concrete test block during concrete pouring;
s6: after pouring, the pile casing (10) at the position of the orifice and the like can be recycled, and the pile casing part above the ground is removed after the concrete strength reaches 5 MPa.
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