CN111749231A - Double-sleeve double-drive full-rotation pile forming device and pile forming process - Google Patents
Double-sleeve double-drive full-rotation pile forming device and pile forming process Download PDFInfo
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- CN111749231A CN111749231A CN202010481982.6A CN202010481982A CN111749231A CN 111749231 A CN111749231 A CN 111749231A CN 202010481982 A CN202010481982 A CN 202010481982A CN 111749231 A CN111749231 A CN 111749231A
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- 238000000034 method Methods 0.000 title claims description 20
- 238000005553 drilling Methods 0.000 claims abstract description 29
- 230000002787 reinforcement Effects 0.000 claims abstract description 26
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 17
- 238000010276 construction Methods 0.000 claims abstract description 17
- 239000010959 steel Substances 0.000 claims abstract description 17
- 239000011435 rock Substances 0.000 claims abstract description 11
- 235000019738 Limestone Nutrition 0.000 claims abstract description 9
- 239000006028 limestone Substances 0.000 claims abstract description 9
- 239000002689 soil Substances 0.000 claims description 9
- 239000010720 hydraulic oil Substances 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 4
- 230000009977 dual effect Effects 0.000 claims description 3
- 238000009412 basement excavation Methods 0.000 claims description 2
- 238000013461 design Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 238000012360 testing method Methods 0.000 claims description 2
- 239000000758 substrate Substances 0.000 claims 2
- 238000011161 development Methods 0.000 abstract description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 238000009527 percussion Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009189 diving Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
- E02D5/385—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds with removal of the outer mould-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
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/10—Slips; Spiders ; Catching devices
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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
- E21B3/00—Rotary drilling
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Paleontology (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The invention discloses a double-sleeve double-drive full-rotation pile forming device which comprises a double-sleeve double-drive full-rotation drilling machine, an upper clamping piece, a lower clamping piece, an outer sleeve, an inner sleeve and a steel reinforcement cage, wherein the lower clamping piece is connected with the outer sleeve, the outer sleeve can be pressed downwards to penetrate through a backfill layer through forward rotation, the outer sleeve can be pulled out from the backfill layer through reverse rotation, the upper clamping piece is connected with the inner sleeve, the inner sleeve can be pressed downwards to penetrate through a strong rock and a karst cave to enter a weathered limestone layer in a bearing layer through forward rotation, the inner sleeve can be pulled out through reverse rotation, the steel reinforcement cage is placed in the middle position of the outer sleeve and the inner sleeve, a concrete guide pipe is arranged in the middle position of the steel reinforcement cage and can be placed and lifted along the center position of the steel reinforcement. The invention can meet the construction depth of the ultra-long pile, can greatly improve the hole forming efficiency, has the hole forming depth of 120m, and solves the problems of limited pile length and low pile forming efficiency in complex stratums such as deep backfill layer karst development areas and the like.
Description
Technical Field
The invention relates to the technical field of concrete cast-in-place pile construction, in particular to a double-sleeve double-drive full-rotation pile forming device and a pile forming process.
Background
Among the construction of many types of pile foundations, the construction methods of cast-in-place pile foundations which are commonly adopted are a spiral drilling machine hole-forming method, a diving drilling machine hole-forming method, a percussion drilling machine hole-forming method, a forward and reverse circulation rotation method, a percussion and grab drilling machine hole-forming method and the like; in many karst landform areas, mountain areas and hilly lands, the upper layer in a building field area is a deep backfill layer, the backfill thickness is thicker, the lower layer karst cave and the karst gap are more developed, and the distribution range and the depth are wider; when the existing pile foundation construction technology is used for constructing a pile foundation of more than 60m, the pile forming efficiency is extremely low, the construction length of the pile foundation can reach 80m at most, and the length can not meet the existing construction requirements; therefore, a device and a process capable of constructing the ultra-long pile foundation need to be innovatively developed, so that the pile foundation can efficiently and quickly penetrate through a complex stratum to reach a bearing stratum, the pile forming quality is met, and meanwhile, the construction efficiency can be improved.
Because the pile foundations in such complex strata are mostly rock-socketed piles, the pile foundations need to reach a reliable bearing stratum; when the thickness of the surface backfill layer reaches 60m and the lower layer is a multilayer karst cave, the length of the pile foundation can reach more than 100 m; the longer the pile foundation is, the larger the friction force between the outer wall of the casing and the soil body is; when the length of the pile exceeds more than 60m, the down-pressing and rotary casing pipe downward drilling efficiency of the full-slewing drilling machine is extremely low, and the construction progress of the pile foundation is seriously influenced.
Disclosure of Invention
In order to overcome the technical defects in the prior art, the invention provides a double-sleeve double-drive full-rotation pile forming device and a pile forming process, which can meet the construction depth of an ultra-long pile, can greatly improve the hole forming efficiency, can reach the hole forming depth of 120m, and solve the problems of limited pile length and low pile forming efficiency in the construction process in a deep backfill layer karst development area.
The invention realizes the aim through the following technical scheme, and the double-sleeve double-drive full-rotation type pile forming device comprises a double-sleeve double-drive full-rotation drilling machine, an upper clamping piece, a lower clamping piece, an outer sleeve, an inner sleeve and a reinforcement cage.
Go up the clamping piece and all install on double-pipe dual drive full-rotation drilling machine down the clamping piece, and adopt hydraulic system to drive, lower clamping piece is in the same place with outer tube coupling, forward rotation can push down the outer tube and pass the backfill layer, reverse rotation can extract the outer tube from the backfill layer, it is in the same place with interior bushing coupling to go up the clamping piece, forward rotation can push down the inner tube and pass strong weathering rock, the cavern gets into the lime rock layer in the bearing layer, reverse rotation can extract the lime rock layer from bearing layer, the cavern and strong weathering rock with the inner tube.
The steel reinforcement cage is placed outer sleeve pipe and interior sheathed tube intermediate position, and the intermediate position of steel reinforcement cage is provided with the concrete pipe, can put along steel reinforcement cage central point and transfer and lift by crane, the upper end fixedly connected with funnel of concrete pipe.
The double-sleeve double-drive full-rotation type pile forming device is characterized in that the double-sleeve double-drive full-rotation drilling machine is double-driven, is provided with two sets of hydraulic drive systems, is used for driving the upper clamping piece and the lower clamping piece respectively, and is matched with the inner sleeve and the outer sleeve with different diameters.
Generally, compared with the prior art, the technical scheme of the invention can achieve the following beneficial effects: the double-sleeve double-drive full-rotation pile forming device adopts the hydraulic double-drive system to respectively press the inner sleeve and the outer sleeve, has simple field construction operation, can meet the construction depth of an ultra-long pile, can greatly improve the hole forming efficiency, has the hole forming depth of 120m, and solves the problems of limited pile length and low pile forming efficiency in complex stratums such as deep backfill layer karst development areas and the like.
Drawings
The following detailed description of embodiments of the invention is provided in conjunction with the appended drawings, in which:
FIG. 1 is a schematic structural diagram of a double-sleeve double-drive full-rotation pile forming device according to the present invention;
in the figure: the drilling machine comprises a 1-double-sleeve double-drive full-rotation drilling machine, 2-an upper clamping piece, 3-a lower clamping piece, 4-an outer sleeve, 5-a backfill layer, 6-a karst cave, 7-a bearing stratum with a weathered limestone layer, 8-a strongly weathered rock, 9-an inner sleeve, 11-a reinforcement cage, 12-a concrete conduit and 13-a funnel.
Detailed Description
As shown in fig. 1, the double-sleeve double-drive full-rotation pile forming device according to the present invention includes a double-sleeve double-drive full-rotation drilling machine 1, an upper clamping piece 2, a lower clamping piece 3, an outer sleeve 4, an inner sleeve 9, and a reinforcement cage 11, wherein the double-sleeve double-drive full-rotation drilling machine 1 is double-driven, and has two sets of hydraulic drive systems for driving the upper clamping piece 2 and the lower clamping piece 3, respectively, and is configured with the inner sleeve 9 and the outer sleeve 4 having different diameters. The lower clip 3 is connected with the outer sleeve 4, the outer sleeve 4 can be pressed down to pass through the backfill layer 5 by forward rotation, and the outer sleeve 4 can be pulled out of the backfill layer 5 by reverse rotation. The upper clamping piece 2 is connected with the inner sleeve 9, the inner sleeve 9 can be pressed downwards to pass through the strong weathering rock 8 and the karst cave 6 to enter the stroke limestone layer 7 in the bearing zone through forward rotation, and the inner sleeve 9 can be pulled out of the stroke limestone layer 7, the karst cave 6 and the strong weathering rock 8 in the bearing zone through reverse rotation.
The steel reinforcement cage 11 is placed in the intermediate position of outer sleeve pipe 4 and interior sleeve pipe 9, and the intermediate position of steel reinforcement cage 11 is provided with concrete pipe 12, can follow 11 central point of steel reinforcement cage and put and lift by crane, the upper end fixedly connected with funnel 13 of concrete pipe 12.
A double-sleeve double-drive full-rotation pile forming process comprises the following steps:
the method comprises the following steps: moving the double-sleeve double-drive full-slewing drilling machine 1 to be in place on a road base plate which is measured and positioned, and enabling the center of the sleeve pipe embracing device to coincide with the center of the road base plate;
step two: placing a first section of steel sleeve outer sleeve 4 with a specially-made tool bit at the bottom in the middle of a jaw of a drilling machine, driving a lower clamping piece 3 to be hooped by a hydraulic oil cylinder, rotating the lower clamping piece 3 to press the outer sleeve 4 downwards, taking soil from the inner part of the sleeve by a rotary drilling machine, lengthening the outer sleeve 4 while taking the soil, and ensuring the depth of a sleeve bottom opening ahead of an excavation surface all the time in the soil taking process until the outer sleeve 4 passes through a deep backfill layer 5;
step three: the hydraulic oil cylinder is replaced to drive the upper clamping piece 2 to hoop the inner sleeve 9, the double-sleeve double-drive full-slewing drilling machine 1 continues to rotate to enable the upper clamping piece 2 to press down the inner sleeve 9, the rotary drilling machine takes soil from the inner sleeve, the inner sleeve 9 is lengthened while taking soil, until the inner sleeve 9 passes through the strongly weathered limestone 8 and the karst cave 6 and reaches the weathered limestone layer 7 in the bearing zone, and the drilling is continued until the requirement of pile foundation rock-socketing is met;
step four: after the pile hole is qualified, hanging and gradually lengthening the formed reinforcement cage 11 section by section, so that the center of the reinforcement cage 11 is coincided with the center of the pile, and all the reinforcement cages 11 are descended to the designed elevation;
step five: after the concrete guide pipe 12 is qualified by tests, hanging and lengthening the concrete guide pipe section by section to enter the middle of the reinforcement cage 11, strictly measuring the distance from the bottom opening of the pipe to the bottom of the hole until the distance meets the design requirements, and finally fixedly connecting the funnel 13 with the concrete guide pipe 12;
step six: pouring by adopting super-retarding self-compacting underwater undispersed concrete, wherein the first poured concrete amount meets the bottom sealing requirement; pouring concrete continuously, driving the upper clamping piece 2 to hoop the inner sleeve 9 by using a hydraulic oil cylinder, gradually pulling out the inner sleeve 9, measuring the position of the concrete surface in the hole by using a conical detection hammer to enable the concrete surface to be always higher than the bottom opening of the concrete guide pipe 12, repeating the steps until the concrete surface in the inner sleeve 9 exceeds the pipe bottom of the outer sleeve 4, and completely pulling out the inner sleeve 9;
step seven: and (3) continuously pouring concrete, driving the lower clamping piece 3 to hoop the outer sleeve 4 by the hydraulic oil cylinder, gradually pulling out the outer sleeve 4, ensuring the buried depth of the guide pipe when the liquid level of the concrete drops steeply or rises slowly when meeting the karst cave 6 in the pouring process, continuously pouring until the liquid level of the concrete rises normally, and finishing pile foundation construction when the concrete level reaches the designed elevation.
The double-sleeve double-drive full-rotation pile forming device adopts the hydraulic double-drive system to respectively press the inner sleeve 9 and the outer sleeve 4, has simple field construction operation, can meet the construction depth of an ultra-long pile, can greatly improve the hole forming efficiency, can reach the hole forming depth of 120m, and solves the technical problems of limited pile length and low pile forming efficiency in complex strata such as deep backfill layer karst development areas and the like.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (3)
1. The utility model provides a double cannula dual drive full rotation formula becomes stake device, includes double cannula dual drive full rotation drilling machine (1), goes up clamping piece (2), clamping piece (3) down, outer tube (4), interior sleeve pipe (9) and steel reinforcement cage (11), its characterized in that:
the upper clamping piece (2) and the lower clamping piece (3) are both arranged on the double-sleeve double-drive full-slewing drilling machine (1) and are driven by a hydraulic system;
the lower clamping piece (3) is connected with the outer sleeve (4), the outer sleeve (3) can be pressed downwards to penetrate through the backfill layer (5) through forward rotation, and the outer sleeve can be pulled out of the backfill layer (5) through reverse rotation;
the upper clamping piece (2) is connected with the inner sleeve (9), the inner sleeve (9) can be pressed downwards to pass through the strongly weathered rock (8) and the karst cave (6) to enter the strongly weathered limestone layer (7) in the bearing zone through forward rotation, and the inner sleeve (9) can be pulled out of the strongly weathered rock layer (8), the karst cave (6) and the strongly weathered rock (7) through reverse rotation;
the steel reinforcement cage (11) is placed at the middle position of the outer sleeve (4) and the inner sleeve (9), a concrete conduit (12) is arranged at the middle position of the steel reinforcement cage (11), the steel reinforcement cage (11) can be placed and lifted along the center position of the steel reinforcement cage, and a funnel (13) is fixedly connected to the upper end of the concrete conduit (12).
2. The double-sleeve double-drive full-rotation pile forming device according to claim 1, which is characterized in that: the double-sleeve double-drive full-slewing drilling machine (1) is double-driven, is provided with two sets of hydraulic drive systems, is used for driving an upper clamping piece (2) and a lower clamping piece (3) respectively, and is matched with an inner sleeve (9) and an outer sleeve (4) with different diameters.
3. A double-sleeve double-drive full-rotation pile forming process is characterized in that: the pile forming process method comprises the following steps:
s1: moving the double-sleeve double-drive full-slewing drilling machine (1) in place on a road substrate which is measured and positioned, so that the center of the sleeve pipe embracing device is superposed with the center of the road substrate;
s2: placing a first section of steel sleeve outer sleeve (4) with a specially-made tool bit at the bottom in the middle of a jaw of a drilling machine, driving a lower clamping piece (3) to be tightened by a hydraulic oil cylinder, rotating the lower clamping piece (3) to press the outer sleeve (4) downwards, taking soil from the inner part of the sleeve by a rotary drilling machine, lengthening the outer sleeve (4) while taking the soil, and ensuring the depth of a sleeve bottom opening ahead of an excavation surface in the soil taking process all the time until the outer sleeve (4) passes through a deep backfill layer (5);
s3: the hydraulic oil cylinder is replaced to drive the upper clamping piece (2) to clamp the inner sleeve (9), the double-sleeve double-drive full-slewing drilling machine (1) continues to rotate to enable the upper clamping piece (2) to press down the inner sleeve (9), the rotary drilling machine fetches earth from the inner sleeve, the inner sleeve (9) is lengthened while fetching earth until the inner sleeve (9) penetrates through the strongly weathered limestone (8) and the karst cave (6) and reaches the weathered limestone layer (7) in the bearing layer, and the drilling is continued until the requirement of pile foundation rock-socketing is met;
s4: after the pile hole is qualified, hanging and gradually lengthening the formed reinforcement cage (11) section by section, so that the center of the reinforcement cage (11) is coincided with the center of the pile, and all the reinforcement cages (11) are descended to the designed elevation;
s5: after the concrete conduit (12) is qualified by tests, hanging and lengthening the concrete conduit section by section to enter the middle of the reinforcement cage (11), strictly measuring the distance from the bottom opening of the pipe to the bottom of the hole until the distance meets the design requirement, and finally fixedly connecting the funnel (13) with the concrete conduit (12);
s6: pouring by adopting super-retarding self-compacting underwater undispersed concrete, wherein the first poured concrete amount meets the bottom sealing requirement; pouring is continuously carried out, concrete is poured while the upper clamping piece (2) is driven by a hydraulic oil cylinder to hoop the inner sleeve (9), the inner sleeve (9) is gradually pulled out, the position of the concrete surface in the hole is measured by adopting a conical detection hammer, the concrete surface is always higher than the bottom opening of the concrete guide pipe (12), the steps are repeated until the concrete surface in the inner sleeve (9) exceeds the pipe bottom of the outer sleeve (4), and the inner sleeve (9) is completely pulled out;
s7: and (3) continuing pouring concrete, driving the lower clamping piece (3) to clamp the outer sleeve (4) by the hydraulic oil cylinder, gradually pulling out the outer sleeve (4), ensuring the buried depth of the guide pipe when the liquid level of the concrete drops steeply or rises slowly when meeting the karst cave (6) in the pouring process, continuously pouring until the liquid level of the concrete rises normally, and finishing pile foundation construction when the concrete level reaches the designed elevation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010481982.6A CN111749231A (en) | 2020-06-01 | 2020-06-01 | Double-sleeve double-drive full-rotation pile forming device and pile forming process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010481982.6A CN111749231A (en) | 2020-06-01 | 2020-06-01 | Double-sleeve double-drive full-rotation pile forming device and pile forming process |
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| Publication Number | Publication Date |
|---|---|
| CN111749231A true CN111749231A (en) | 2020-10-09 |
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| CN202010481982.6A Pending CN111749231A (en) | 2020-06-01 | 2020-06-01 | Double-sleeve double-drive full-rotation pile forming device and pile forming process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113047873A (en) * | 2021-03-30 | 2021-06-29 | 中国地质大学（北京） | Large-diameter cylinder implantation method suitable for thick and hard top plate goaf or limestone karst cave treatment |
| CN114215046A (en) * | 2021-11-29 | 2022-03-22 | 中建八局第二建设有限公司 | Double-sleeve mold for pile foundation pouring in pit backfill area and construction method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202000929U (en) * | 2011-01-20 | 2011-10-05 | 天津市辰龙工程机械有限公司 | Center-adjustable full-hydraulic double-sleeve clamper used for anchor drilling machine |
| CN103603342A (en) * | 2013-11-01 | 2014-02-26 | 中冶天工上海十三冶建设有限公司 | Construction method of ultra-long bored concrete pile with large-diameter casing combination |
| CN105887813A (en) * | 2016-05-07 | 2016-08-24 | 深圳市宏业基基础工程有限公司 | Large-diameter super-long pile construction method in karst area through full-casing pipe full rotating and rotary drilling |
| US20160340851A1 (en) * | 2014-03-28 | 2016-11-24 | Oil Transporting Joint Stock Company "Transneft" | Method for installing metal piles in permafrost soil |
| CN108194022A (en) * | 2018-02-11 | 2018-06-22 | 上海工程机械厂有限公司 | A kind of double drive drilling machine |
-
2020
- 2020-06-01 CN CN202010481982.6A patent/CN111749231A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202000929U (en) * | 2011-01-20 | 2011-10-05 | 天津市辰龙工程机械有限公司 | Center-adjustable full-hydraulic double-sleeve clamper used for anchor drilling machine |
| CN103603342A (en) * | 2013-11-01 | 2014-02-26 | 中冶天工上海十三冶建设有限公司 | Construction method of ultra-long bored concrete pile with large-diameter casing combination |
| US20160340851A1 (en) * | 2014-03-28 | 2016-11-24 | Oil Transporting Joint Stock Company "Transneft" | Method for installing metal piles in permafrost soil |
| CN105887813A (en) * | 2016-05-07 | 2016-08-24 | 深圳市宏业基基础工程有限公司 | Large-diameter super-long pile construction method in karst area through full-casing pipe full rotating and rotary drilling |
| CN108194022A (en) * | 2018-02-11 | 2018-06-22 | 上海工程机械厂有限公司 | A kind of double drive drilling machine |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113047873A (en) * | 2021-03-30 | 2021-06-29 | 中国地质大学（北京） | Large-diameter cylinder implantation method suitable for thick and hard top plate goaf or limestone karst cave treatment |
| CN114215046A (en) * | 2021-11-29 | 2022-03-22 | 中建八局第二建设有限公司 | Double-sleeve mold for pile foundation pouring in pit backfill area and construction method thereof |
| CN114215046B (en) * | 2021-11-29 | 2023-08-15 | 中建八局第二建设有限公司 | Double-sleeve mold for pile foundation pouring in pit backfill area and construction method thereof |
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