CN108798528B - Drill bit for breaking waste pipe piles and method for breaking waste pipe piles and filling new piles - Google Patents
Drill bit for breaking waste pipe piles and method for breaking waste pipe piles and filling new piles Download PDFInfo
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- CN108798528B CN108798528B CN201810862809.3A CN201810862809A CN108798528B CN 108798528 B CN108798528 B CN 108798528B CN 201810862809 A CN201810862809 A CN 201810862809A CN 108798528 B CN108798528 B CN 108798528B
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- 239000002699 waste material Substances 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 60
- 239000010959 steel Substances 0.000 claims abstract description 60
- 238000005553 drilling Methods 0.000 claims abstract description 28
- 210000001503 joint Anatomy 0.000 claims abstract description 4
- 238000005520 cutting process Methods 0.000 claims description 25
- 238000004140 cleaning Methods 0.000 claims description 11
- 210000002435 tendon Anatomy 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 9
- 239000002689 soil Substances 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 5
- 230000002787 reinforcement Effects 0.000 claims description 4
- 238000011835 investigation Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims 2
- 238000010276 construction Methods 0.000 abstract description 16
- 239000011435 rock Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 239000011295 pitch Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000036346 tooth eruption Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000010438 granite Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/44—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D9/00—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof
- E02D9/005—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof removing the top of placed piles of sheet piles
-
- 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
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Piles And Underground Anchors (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The application discloses a drill bit for breaking waste pipe piles and a method for breaking waste pipe piles and pouring new piles, wherein the drill bit comprises a mandrel, the outer circumference of the mandrel is provided with a helical blade, the top of the mandrel is provided with a connecting part for being in butt joint with a drill rod of a drilling machine, a plurality of picks are arranged below at least the middle part of the helical blade, the bottom of the mandrel is provided with a vertical steel bar bundle welded by a plurality of short steel bars, the steel bar bundle and the mandrel are coaxial, and the outer diameter of the steel bar bundle is smaller than or equal to the inner diameter of the waste pipe piles to be broken; the key of the method is as follows: the two steps of old pile crushing and new pile pore-forming are combined into one, and the two steps are synchronously performed. The drill bit and the method can effectively break the waste pipe pile with the depth of more than 20 meters, and the old pile breaking and the new pile hole forming can be synchronously performed, so that the construction efficiency is accelerated, and the construction cost is reduced.
Description
Technical Field
The application relates to the technical field of building foundation construction, in particular to a drill bit for breaking waste pipe piles and a method for breaking waste pipe piles and pouring new piles by using the drill bit.
Background
In municipal construction, it is often necessary to demolish a low-rise building and then build a taller, newer building on the old foundation. This involves the problem of the removal of old piles and the casting of new piles. The application aims at dismantling waste pipe piles, and of course, the pipe piles are to be understood in a broad sense, namely the pile type hollow inside and the pile type hollow outside are concrete, and the pile type hollow inside and the pile type hollow outside are hollow circular pipe piles such as high-strength PHC pipe piles and hollow square piles.
The construction process of the transformation of the waste piles in the prior art is as follows: and (3) extracting the waste tubular piles on the foundation by using a pile extractor with pile extracting sleeves, reaming and deepening the residual pile holes after pile extraction to form larger and deeper pile holes, cleaning the pile holes, placing a reinforcement cage, and pouring concrete to form new bored cast-in-place piles. Thus, the old tubular pile with small bearing capacity is pulled out, and the new bored pile with larger diameter, deeper pile and stronger bearing capacity is cast.
The construction process in the prior art has the following defects: firstly, the length of a pile pulling sleeve of a pile pulling machine is limited and is generally not more than 20 meters, so that only the pipe pile with the depth of 20 meters can be pulled out, and the existing pile pulling equipment cannot be used for pulling out the pipe pile with the depth of more than 20 meters; moreover, for a construction unit, a set of pile pulling equipment is specially provided, if the pile pulling equipment is purchased, the utilization rate is low and is not cost-effective, if the pile pulling equipment is rented, the rent is very high, the cost of equipment transfer is also necessary, the cost is not cost-effective in economy, and the equipment transfer is time-consuming and labor-consuming and is easy to be untimely and delay in construction period; moreover, the process of pulling out and drilling larger and deeper holes of the old pile is carried out step by step, and the construction efficiency is not high.
Disclosure of Invention
The application aims to solve the technical problem of providing the drill bit for breaking the waste pipe pile, which can effectively break the waste pipe pile with the depth of more than 20 meters, and can synchronously break the old pile and form the new pile hole, so that the construction efficiency is accelerated and the construction cost is reduced.
The application provides a drill bit for breaking waste pipe piles, which comprises a mandrel, wherein a spiral blade is arranged on the outer circumference of the mandrel, a connecting part for being in butt joint with a drill rod of a drilling machine is arranged at the top of the mandrel, a plurality of cutting picks are arranged below at least the middle part of the spiral blade, a vertical steel bar bundle formed by welding a plurality of short steel bars is arranged at the bottom of the mandrel, the steel bar bundle and the mandrel are coaxial, and the outer diameter of the steel bar bundle is smaller than or equal to the inner diameter of the waste pipe piles to be broken.
After adopting the structure, the drill bit for breaking the waste tubular piles has the following advantages: the device combines the two steps of old pile crushing and new pile hole forming into one, so that the two steps are synchronously carried out, and the construction efficiency is accelerated; the broken depth of the old pile is not limited by the pile pulling sleeve of the pile pulling machine, and different depths can be drilled according to the needs to break the old pile with the depth exceeding 20 meters; moreover, the old pile dismantling equipment is integrated with the drill bit, so that special pile pulling equipment is not required to be additionally arranged, the holding cost, the leasing cost and the transition cost of the pile pulling equipment are reduced, and the old pile dismantling equipment is taken along with use, and the special pile pulling equipment is not required to wait for transition as in the prior art, so that the construction period is prevented from being delayed; moreover, as the helical blades crush soil around the old pile, the aperture of the new pile is far larger than the diameter of the old pile, and the helical blades with cutting teeth can directly drill in even softer rock layers such as sandstone, mudstone, aposticated limestone and the like, and the waste pipe piles sink by vibrating by a vibrating machine, and certainly cannot enter the rock, the depth and the pile diameter of the new pile are effectively increased, namely the new pile is thicker and deeper, so that larger bearing capacity is obtained, and the requirements of modern high-rise buildings are met; moreover, besides crushing concrete, the cutting pick can also hook the old pile steel bars and hinge the old pile steel bars out of the ground, so that the concrete and the steel bars are perfectly crushed; finally, the steel wire bundles welded by a plurality of short steel bars can be inserted into a softer central area in the waste pipe pile in a targeted way, and the blades and the cutting picks crush the concrete, namely, when the blades and the cutting picks crush the concrete and the steel bars, the steel wire bundles are inserted into the center of the waste pipe pile in a targeted way, so that guide support is provided for the waste pipe pile, and vertical drilling in the whole pore-forming process is ensured; moreover, although the guide post of the drill bit is an easily-worn part, the steel bar bundles can be additionally welded at any time, for example, one circle of steel bar bundles can be additionally welded after the outer ring is worn, the process of reinforcing the steel bar bundles is convenient and quick, the cost is low, and the drill bit is convenient to maintain, is firm and durable and is easy to popularize.
Further, a core pipe used for being communicated with the hollow drill rod is arranged on the core shaft along the axis, an internal thread is arranged at the lower opening of the core pipe, a stud with an external thread is screwed at the lower opening of the core pipe, a connector is welded at the lower end of the stud, and the upper ends of all short steel bars of the vertical steel bar bundles are welded with the connector; the screwing direction of the stud is consistent with the drilling direction of the drill bit; therefore, firstly, when the drill is drilled, the screwing direction of the stud is the same as the drill drilling direction, so that the loosening of the stud, the connector and the steel wire bundle in the drill drilling process is successfully avoided; and when the hole is needed to be cleaned after the hole is formed, the connector and the steel bar bundles can be detached only by unscrewing the stud at the lower part of the drill bit, so that the drill bit is hollow, and the subsequent hole cleaning slurry circulation is facilitated.
Further, two blind holes are symmetrically formed in the side wall of the connector, a top block is slidably matched in each blind hole, and a pressure spring is connected between the top block and the bottom of each blind hole; the drill bit is also provided with an auxiliary device for replacing the connector, the auxiliary device comprises two driving cylinders positioned at the orifice, a piston rod of each driving cylinder is fixed with a hoop for holding the connector, and the arc-shaped inner wall of each hoop is provided with a fan ring notch for clamping the ejector block; when the lower structure of the drill bit is required to be disassembled, the connector is clamped by driving the two hoops, under normal conditions, the two ejector blocks of the connector can be propped against the arc-shaped inner wall of the hoops and retract into the blind hole, the drill bit is rotated by a certain angle, the ejector blocks are opposite to the fan ring notch of the hoops, the ejector blocks are ejected out under the action of the pressure spring and are blocked at one end of the fan ring notch, so that the circumferential limitation of the connector and the screw rod is realized, the drill bit is continuously rotated, the connector and the steel bar bundles can be quickly and conveniently screwed down, the lower part of the drill bit core tube is opened, and the subsequent hole cleaning is convenient.
The application aims to solve the other technical problem of providing a method for breaking the waste pipe pile and pouring the new pile by using the drill bit, which can effectively break the waste pipe pile with the depth of more than 20 meters, and can synchronously break the old pile and form the new pile hole, so that the construction efficiency is accelerated and the construction cost is reduced.
The application provides a method for breaking waste pipe piles and pouring new piles by using the drill bit, which comprises the following steps:
a. welding a plurality of short steel bars on the connecting head according to the dimension of the inner diameter of the waste tubular pile obtained by investigation, so that the outer diameter of the formed steel bar bundles is smaller than or equal to the inner diameter of the waste tubular pile to be crushed; and the connector and the tendon are screwed into the drill bit;
b. driving a drill rod to drill down, inserting the steel bar bundles which are firstly contacted with the old piles into the central holes of the waste tubular piles, and performing a guiding function to ensure vertical down-drilling; during drilling, cutting picks on the spiral blades can crush concrete of the waste pipe piles and are accompanied with crushing soil around the waste pipe piles, and concrete scraps and peripheral scraps are brought out of the ground by the rotation of the spiral blades; the cutting pick winds and hinges the steel bars of the waste pipe piles in the drilling process, so that the steel bars are separated from the steel bar cages of the waste pipe piles; lifting a drill rod after drilling to a certain depth, cutting off the steel bars wound on the bit cutting pick by using a gas cutting method, continuously drilling to a certain depth after the steel bars on the bit cutting pick are cleaned, pulling up and cleaning again, and reciprocating until the waste pipe piles are completely broken, and then continuously drilling to the design depth of a new pile; at this time, the old pile is broken and the new pile is formed;
c. and (5) clearing holes, sinking into a reinforcement cage and pouring new pile concrete.
After the steps are adopted, the method has the following advantages: waste pipe pile crushing and new pile pore-forming are synchronously carried out, so that the construction efficiency is improved; the crushing depth of the waste pipe piles is not limited, and the crushing depth exceeds 20 meters; special pile pulling equipment is not needed, so that the cost is saved; the new pile hole is thicker and deeper, and the bearing capacity is stronger; the steel bars of the waste pipe piles can be hinged and carried out, so that thorough crushing is realized; during drilling, the steel bar bundles are guided firstly, and then the blades and the cutting teeth are crushed, so that time difference is formed, and verticality is ensured; the steel bar bundles are easy to replace and are grounded.
As a further improvement, before hole cleaning, the drill bit is pulled up to an orifice, two driving cylinders are driven to enable two anchor clamps to tightly hold a connector of the drill bit, the drill bit is rotated to enable two ejector blocks of the connector to be ejected out and clamped at corresponding fan ring notches, the drill bit is continuously rotated, and a drill bit core tube and a stud on the connector are unscrewed, so that the drill bit core tube and the stud on the connector are separated; removing the anchor ear, the driving cylinder and the connector, inserting a drill bit with the connector removed and the lower opening into the bottom of the hole, and performing mud circulation by using a hollow core tube of the drill bit to clear the hole; the method realizes automatic disassembly of the tendon at the lower part of the drill bit, is convenient and quick, is convenient for subsequent hole cleaning, and is convenient for replacing a new connector and the tendon after the tendon is damaged greatly.
Drawings
Fig. 1 is a schematic diagram of a front view of a drill bit for breaking waste pipe piles according to the present application.
Fig. 2 is a schematic diagram of a cross-sectional enlarged structure of the junction of a core tube and a stud of a drill bit for breaking waste tubular piles.
Fig. 3 is a schematic diagram of a cross-sectional structure of a down side of the drill bit for breaking waste pipe piles after a connector of the drill bit is held tightly by a hoop.
The steel bar cutting machine comprises a mandrel, a spiral blade, a connecting part, a cutting pick, a steel bar bundle, a core tube, a stud, a connector, a blind hole, a top block, a pressing spring, a driving cylinder, a hoop, a curved inner wall, a fan ring notch and a fan ring notch, wherein the mandrel, the spiral blade, the connecting part, the cutting pick, the steel bar bundle, the connecting part, the core tube, the stud, the connecting part, the blind hole, the top block, the pressing spring, the driving cylinder, the arc inner wall and the fan ring notch are shown in the figure 1.
Detailed Description
As shown in the figure, the drill bit for breaking waste tubular piles comprises a mandrel 1, wherein spiral blades 2 are arranged on the outer circumference of the mandrel 1, and a connecting part 3 for being in butt joint with a drill rod of a drilling machine is arranged at the top of the mandrel 1. The helical blade 2 is provided with a plurality of picks 4 at least below the middle part, and of course, the picks 4 may be provided on the helical blade 2 from top to bottom. Moreover, even the teeth of the tooth may be substituted for the cutting pick 4 to obtain a better rock breaking effect.
The bottom of the mandrel 1 is provided with a vertical tendon 5 welded by a plurality of short steel bars, the tendon 5 is coaxial with the mandrel 1, and the outer diameter of the tendon 5 is smaller than or equal to the inner diameter of the waste pipe pile to be crushed. All the short bars are welded together in close proximity to each other to strengthen the strength and support.
Specifically, a core tube 6 for communicating with a hollow drill rod is arranged on the core shaft 1 along the axis, an internal thread is arranged at the lower opening of the core tube 6, a stud 7 with external thread is screwed at the lower opening of the core tube 6, a connector 8 is welded at the lower end of the stud 7, and all the upper ends of short steel bars of the vertical steel bar bundles 5 are welded with the connector 8; the screwing direction of the stud 7 is consistent with the down-drilling direction of the drill bit. If the screw 7 is screwed in a counterclockwise direction, the drill bit is driven in a counterclockwise direction. Short bars are a relative concept and are generally of a length between one blade pitch and two blade pitches, i.e. 12-36 cm, for normal bars.
Two blind holes 9 are symmetrically arranged on the side wall of the connector 8, a top block 10 is slidably matched in each blind hole 9, and a pressure spring 11 is connected between the top block 10 and the bottom of each blind hole 9; the two ends of the pressure spring 11 are respectively fixed with the bottom end of the blind hole 9 and the inner end of the top block 10.
The drill bit is also provided with an auxiliary device for replacing the connector 8, and the auxiliary device is matched with the connector 8 of the drill bit for use. Specifically, the auxiliary device comprises two driving cylinders 12 positioned at the hole openings of the drilling holes, wherein a hoop 13 for clasping the connector 8 is fixed on the piston rod of each driving cylinder 12, and a fan ring notch 15 for clamping the top block 10 is arranged on the arc-shaped inner wall 14 of each hoop 13. Of course, the two driving cylinders 12 can be mounted and fixed on a trolley, and the trolley is in sliding fit on the rail, so that after the connector 8 is removed, the hoop 13 is moved away, the hole opening is reserved, and the drill bit is sunk into the hole bottom again for hole cleaning.
As shown in the figure, the method for breaking the waste pipe piles and pouring the new pipe piles by using the drill bit provided by the application comprises the following steps.
a. Welding a plurality of short steel bars on the connector 8 according to the dimension of the inner diameter of the waste pipe pile obtained by investigation, so that the outer diameter of the formed steel bar bundles 5 is smaller than or equal to the inner diameter of the waste pipe pile to be crushed; and the connector 8 and the tendon 5 are screwed into the drill bit.
b. Driving a drill rod to drill down, inserting the steel bar bundles 5 which are firstly contacted with the old piles into the central holes of the waste tubular piles, and playing a role in guiding to ensure vertical down-drilling; during drilling, the cutting picks 4 on the spiral blades 2 can crush concrete of the waste pipe piles and are attached to soil around the crushed waste pipe piles, and concrete scraps and peripheral crushed soil are brought out of the ground by the rotation of the spiral blades 2; the cutting pick 4 winds and hinges the steel bars of the waste pipe piles in the drilling process, so that the steel bars are separated from the steel bar cages of the waste pipe piles; and after the steel bars on the bit cutting pick 4 are cleaned, the steel bars are continuously drilled down to a certain depth, such as 2 meters, and then pulled up for cleaning, and the steel bars are reciprocated until the waste pipe piles are completely crushed. Then continuing to drill down to the design depth of the new pile; at this time, the old pile is broken and the new pile is formed.
In this step, the drill bit with cutting pick 4 is still normally used, and when the drill bit encounters softer rock formations such as sandstone, mudstone and apoplexia, the drill bit can be directly drilled. However, when harder formations such as granite and basalt are encountered, the toothed bit may be replaced to obtain greater rock breaking capacity.
c. And (5) clearing holes, sinking into a reinforcement cage and pouring new pile concrete.
In the step, before hole cleaning, the drill bit is pulled up to the hole opening of the drill hole, two driving cylinders 12 are driven to enable two anchor clamps 13 to tightly hold a connector 8 of the drill bit, the drill bit is rotated to enable two ejector blocks 10 of the connector 8 to be ejected out and blocked at corresponding fan ring notches 15, the drill bit is continuously rotated to enable a drill bit core tube 6 to be unscrewed from a stud 7 on the connector 8, and the drill bit core tube 6 and the stud 7 are separated from each other; and removing the anchor ear 13, the driving cylinder 12 and the connector 8, inserting a drill bit with the connector 8 removed and the lower opening into the bottom of the hole, and circulating slurry by using the hollow core tube 6 of the drill bit to clear the hole.
Claims (2)
1. The method for breaking the waste pipe piles and pouring the new piles by using the drill bit for breaking the waste pipe piles is characterized by comprising the following steps:
the drill bit comprises a mandrel (1), a helical blade (2) is arranged on the outer circumference of the mandrel (1), and a connecting part (3) for being in butt joint with a drill rod of a drilling machine is arranged at the top of the mandrel (1), and is characterized in that: a plurality of cutting picks (4) are arranged below at least the middle part of the helical blade (2), a vertical steel bar bundle (5) formed by welding a plurality of short steel bars is arranged at the bottom of the mandrel (1), the steel bar bundle (5) and the mandrel (1) are coaxial, and the outer diameter of the steel bar bundle (5) is smaller than or equal to the inner diameter of the waste pipe pile to be crushed; the mandrel (1) is provided with a core tube (6) which is used for being communicated with the hollow drill rod along the axis, the lower opening of the core tube (6) is provided with an internal thread, the lower opening of the core tube (6) is screwed with a stud (7) with external thread, the lower end of the stud (7) is welded with a connector (8), and the upper ends of all short steel bars of the vertical steel bar bundles (5) are welded with the connector (8); the screwing direction of the stud (7) is consistent with the drilling direction of the drill bit; two blind holes (9) are symmetrically formed in the side wall of the connector (8), a top block (10) is slidably matched in each blind hole (9), and a pressure spring (11) is connected between the top block (10) and the bottom of each blind hole (9); the drill bit is also provided with an auxiliary device for replacing the connector (8), the auxiliary device comprises two driving cylinders (12) positioned at the orifice, a piston rod of each driving cylinder (12) is fixedly provided with a hoop (13) for holding the connector (8), and an arc-shaped inner wall (14) of each hoop (13) is provided with a fan ring notch (15) for clamping the top block (10);
the method comprises the following steps:
a. welding a plurality of short steel bars on the connector (8) according to the dimension of the inner diameter of the waste tubular pile obtained by investigation, so that the outer diameter of the formed steel bar bundles (5) is smaller than or equal to the inner diameter of the waste tubular pile to be crushed; and the connector (8) and the tendon (5) are screwed into the drill bit;
b. driving a drill rod to drill down, inserting a tendon (5) which is firstly contacted with the old pile into a central hole of the waste pipe pile, and playing a role in guiding to ensure vertical down-drilling; during drilling, cutting picks (4) on the spiral blades (2) can crush concrete of the waste pipe piles and crush soil around the waste pipe piles, and concrete scraps and peripheral crushed soil are brought out of the ground by the rotation of the spiral blades (2); the cutting pick (4) winds and hinges the steel bars of the waste tubular piles in the drilling process, so that the steel bars are separated from the steel bar cages of the waste tubular piles; lifting a drill rod after drilling to a certain depth, cutting off the reinforcing steel bars wound on the drill bit cutting pick (4) by using a gas cutting method, continuously drilling to a certain depth after the reinforcing steel bars on the drill bit cutting pick (4) are cleaned, pulling up and cleaning again, and reciprocating until the waste pipe piles are completely broken, and then continuously drilling to the design depth of a new pile; at this time, the old pile is broken and the new pile is formed;
c. and (5) clearing holes, sinking into a reinforcement cage and pouring new pile concrete.
2. The method for breaking waste pipe piles and pouring new piles using a drill bit for breaking waste pipe piles according to claim 1, wherein: before hole cleaning, the drill bit is pulled up to an orifice, two driving cylinders (12) are driven, the two anchor clamps (13) tightly hold the connector (8) of the drill bit, the drill bit is rotated, the two ejector blocks (10) of the connector (8) are ejected out and clamped at the corresponding fan ring notches (15), the drill bit is continuously rotated, and the drill bit core tube (6) and the stud (7) on the connector (8) are unscrewed, so that the drill bit core tube and the stud (7) are separated; and removing the anchor ear (13), the driving cylinder (12) and the connector (8), inserting the drill bit with the connector (8) removed and the lower opening into the bottom of the hole, and circulating slurry by using the hollow core tube (6) of the drill bit to clear the hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810862809.3A CN108798528B (en) | 2018-08-01 | 2018-08-01 | Drill bit for breaking waste pipe piles and method for breaking waste pipe piles and filling new piles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810862809.3A CN108798528B (en) | 2018-08-01 | 2018-08-01 | Drill bit for breaking waste pipe piles and method for breaking waste pipe piles and filling new piles |
Publications (2)
| Publication Number | Publication Date |
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| CN108798528A CN108798528A (en) | 2018-11-13 |
| CN108798528B true CN108798528B (en) | 2023-10-20 |
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| CN115213647B (en) * | 2022-08-30 | 2024-02-09 | 山东兖矿智能制造有限公司 | Cutting pick molding method |
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