CN201826302U - Boring device for large-diameter cast-in-situ thin-walled concrete composite pile - Google Patents
Boring device for large-diameter cast-in-situ thin-walled concrete composite pile Download PDFInfo
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- CN201826302U CN201826302U CN2010202878747U CN201020287874U CN201826302U CN 201826302 U CN201826302 U CN 201826302U CN 2010202878747 U CN2010202878747 U CN 2010202878747U CN 201020287874 U CN201020287874 U CN 201020287874U CN 201826302 U CN201826302 U CN 201826302U
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Abstract
The utility model discloses a boring device for a large-diameter cast-in-situ thin-walled concrete composite pile, which has the advantages of green, environmental protection, energy conservation, emission reduction, convenience and speediness in construction, direct vision, high applicability and multiple functions. The boring device comprises medium-high frequency vibrating hammers, a special fixture, an outer steel guard tube, an inner steel guard tube and a plurality of specifically meshed steel valve circular boards, wherein the circle of specifically meshed steel valve circular boards is hinged to the bottom end of the inner steel guard tube, the outer radial circular edge of each of the meshed steel valve circular boards clings to the inner wall of the outer steel tube while the steel valve boards are capable of sliding vertically, all the medium-high frequency vibrating hammers are connected with the inner steel guard tube and the outer steel guard tube in a clamped or loose manner through clamping heads of the special fixture, and the upper portion of the outer steel guard tube is provided with a concrete injection port. In the technical scheme, construction cost can be reduced by above 10%, construction strength and difficulty can be reduced, concrete can be saved by 50%, dead weight of pile equipment can be reduced by 70%, pollution of secondary dredging and transport can be avoided, and the boring device is applicable to different soft soil layers and in-situ constructions.
Description
Technical field
The utility model relates to the job practices and the special-purpose perforating device of the cast-in-place thin wall concrete composite pile of a kind of major diameter, is particularly useful in the processing of composite pile ground and dykes and dams, barricade and foundation pit supporting construction of all kinds of weak soil, backfill, burning into sand layer soil.
Background technology
At present, in the pile foundation construction of handling all kinds of weak soil, backfill, burning into sand layer soil, traditional major diameter cast-in-situ concrete pile construction method is to squeeze into or be pressed into single steel casing in the soil earlier, fetch earth by punching, excavation or auger again, this job practices needs to discharge a large amount of earth in pore forming process, not only engineering quantity big, bring pollution for on-the-spot regional environment, and in secondary desilting transportation, polluted environment once more.Equally, need use a large amount of concrete during pile body, not only consuming timely take a lot of work again, also strengthen engineering cost in cast.
Disclose the technical matters of a kind of " being embedded in the job practices and the forced one-step pore-creating device of the concrete barrel of subgrade " at present in the national inventing patent, the patent No. is ZL98113070.4.The construction principle of this patent is disposable will being fixed on the flange connector on the inside and outside casing, fixedly connected electronic vibrating hammer is an integral body, inside and outside steel casing lower end is supported in the prefabricated annular shoe, and exert pressure jointly by special-purpose pile driving frame and device systems, make the disposable a kind of job practices that is pressed in the soil of perforating device.Except that the advantage that has, also there is distinctive defective in this construction technology in the practice of construction process:
1, if will in the thin-walled stake, put into reinforcing cage, must before exerting pressure, promote perforating device the length of reinforcing cage earlier, again reinforcing cage after inside and outside steel casing lower end is drawn high the steel casing thin-walled inner chamber (this moment, reinforcing cage was impaired easily) and is fixed, again by construction process lower perforating device, locate, compress into annular shoe, exert pressure at last and bury.This construction link has increased construction intensity and difficulty greatly, has also increased the equipment cost expense.
2, owing to being entity, the inside and outside steel casing upper and lower side of perforating device is pressed in the soil, in the process of burying, need overcome frictional resistance and stake end reaction on the inside and outside steel casing wall simultaneously, just need to use heaviness and powerful pile machine equipment supporting, cause equipment self-weight increasing and cost to increase.
3, because the inside and outside steel casing of perforating device upper end is fixedly connected, by building the concrete that inlet is built, can not observe directly the end face of concreting, need be in the tube drawing process, aerial secondary adds concrete, has added concrete in the practical operation often.This link has also increased construction intensity and difficulty greatly except that concrete amount increases.
4, because the total deadweight of a whole set of stake airborne equipment is more concentrated for 100T stress, require the construction plant to have certain carrying dynamics; Big (12mx23m) some place of framework platform area occupied is limited.
5, owing to the huge heaviness of a whole set of pile machine equipment, moving has slowly increased the construction period, if cross over two adjacent work areas, need tear machine and installation piling machine again open all need increase by 20 days time again, and taking time and effort construction cost increases again.
In order to overcome the deficiency that above-mentioned conventional method and patent ZL98113070.4 technology exist in work progress, avoid reinforcing cage impaired easily, reduce construction intensity and difficulty, saving amount of concrete, reduce the steel casing bury frictional resistance, reduce equipment self-weight, shorten construction period, avoid secondary desilting transportation pollution, improve efficiency of construction, the expense that reduces cost, adapt to different soil and place construction, just become the technical problem that the art of this patent scheme will solve.
The utility model content
At the problems referred to above, the utility model aims to provide a kind of environmental protection, energy-saving and emission-reduction, convenient and quick construction, directly perceived, compliance is strong, function the is many perforating device that is used for the cast-in-place thin wall concrete composite pile of major diameter.
For realizing this technical purpose, scheme of the present utility model is: a kind of perforating device that is used for the cast-in-place thin wall concrete composite pile of major diameter, comprise medium-high frequency vibrating hammer and special fixture device, outer steel casing, interior steel casing, the bottom of steel casing is hinged with the ring-like plate of a circle multi-disc interlock steel flap valve in described, and the radially outer shroud edge of the ring-like plate of this interlock steel flap valve is close to outer steel cylinder inwall and is kept steel flap valve plate to slide flexibly up and down; Described medium-high frequency vibrating hammer device all by the special fixture chuck with the clamping of inside and outside steel casing, unclamp and be connected; The top of described outer steel casing is provided with concrete and pours into mouth.
Further concrete as this patent, described outer steel casing top is provided with a plurality of spacing blocks and interior steel casing is isolated.
Further concrete as this patent, also be provided with low-pressure drainage system on the inwall of described interior steel casing.
Further concrete as this patent, also be provided with the high-pressure slip-casting system on the inwall of described interior steel casing.
Further concrete as this patent, also comprise the firming plate, the cross section coupling of the shape of this plate size and interior steel casing, can with medium-high frequency vibrating hammer device by the special fixture chuck with the clamping of firming panel assembly, unclamp and be connected.
Scheme of the present utility model can reduce construction intensity and difficulty, saving amount of concrete, reduce pollution, raising efficiency of construction, the construction cost expense that reduces, adaptation different soil and place construction that the steel casing buries frictional resistance, reduces equipment self-weight, shortens construction period, avoids the secondary desilting to transport; Can also effectively avoid reinforcing cage impaired easily.
Description of drawings
Fig. 1 is a complete composite technology principle schematic of the present utility model.
Fig. 2 sinks to the schematic diagram of soil layer design elevation position for outer steel casing of the present utility model.
Fig. 3 sinks to the schematic diagram of soil layer design elevation position for steel casing in of the present utility model.
Fig. 4 is the schematic diagram of specific interlock steel flap valve circular groups plywood of the present utility model.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the utility model technology is described in further details:
Shown in Fig. 1,2,3,4, the utility model provides a kind of by having the special fixture association that hydraulic pressure (electronic) vibrating hammer 1, flange 2, special fixture chute crossbeam 3, moving telescopic chuck 4 equipment are formed, successively respectively externally steel casing 6 and interior steel casing 7 and in the steel casing bottom annular slab that has an outer open form of adaptation multi-angle that specific multi-disc interlock steel flap valve 10 forms implement to shake and be pressed into soil and the operation construction technology of the pipe of extricating oneself from a predicament and brace oneself up to action.
Outer steel casing 6 and interior steel casing 7 are to rely on a plurality of steel casing spacing blocks 13 on outer steel casing 6 tops and the thin-walled cavity of the annular slab 10 synergy formations that interior steel casing 7 bottoms have jointed shaft 9 and the outer open form of multi-disc interlock steel flap valve.In when construction, an outer steel casing 6 is shaken is pressed into soil earlier, and then the interior steel casing 7 that has an interlock steel flap valve annular slab 10 together shakes and be pressed into soil, the thin-walled soil body of 7 of outer steel casing 6 and interior steel casings is pushed in the inner chamber, and advanced compacted undisturbed soil.
When construction, after earlier hanging in reinforcing cage in the thin-walled cavity of 7 of outer steel casing 6 and interior steel casings from top to bottom, concrete spouting entrance 5 concretings on steel casing 6 tops outside being connected in can intuitively be seen the concrete surface of building by upper end, thin-walled chamber again.The tight special fixture association of steel casing top clamping can make things convenient for the application of force and remove.Like this, both convenient construction can guarantee construction quality and speed again.
The demand of scheme of the present utility model can the be taken into account cast-in-place thin wall concrete composite pile of major diameters multi-functional, many use.Low-pressure drainage system 12 in internally the undisturbed soil in steel casing 7 chambeies can adopt and be connected on steel casing 7 walls carries out initiatively draining, can adopt the high-pressure slip-casting system 11 that is connected on interior steel casing 7 walls to carry out slip casting, can adopt the firming panel assembly 14 that is matched with on the interior steel casing 7 to carry out the compacted draining of firming.Above method synthesis uses the physico-mechanical properties that can improve undisturbed soil in the tube chamber greatly, improves resistance to compression, the shearing modulus of undisturbed soil greatly, and then has improved the bearing capacity of foundation soil and the shear resistance of undisturbed soil.It is an integral body that improvement back soil column in cast-in-place thin wall concrete stake of major diameter and the tube chamber is mixed, and just forms the cast-in-place thin wall concrete composite pile of major diameter with various function.
In the present embodiment the main quinquepartite of special-purpose perforating device form: first forms for the association that has hydraulic pressure (electronic) vibrating hammer 1, flange 2 and special fixture 3 and chuck 4 equipment; Second portion is that interior 7 outer 6 steel casings of two different-diameters, different length, different wall are formed; Third part is the outer open form annular slab of the adaptation different angles that the specific multi-disc interlock in steel casing bottom steel flap valve 10 is formed in being articulated in; The 4th part is that one group of high-pressure slip-casting system 11 and the one group of low-pressure drainage system 12 on the steel casing inwall formed in being fixed in; The 5th part is the firming panel assembly 14 in the steel casing inner chamber in being matched with.The spacing block 13 on steel casing top separates inside and outside steel casing and the distance that keeps relative stability outside being put in pore forming process.
In practice of construction, job practices of the present utility model specifically adopts following steps:
One, according to the signal of Fig. 2, by loop wheel machine elder generation the stake position that outer steel casing 6 hangs appointment is upward located, temporary fixed by the digging machine that has telescopic arm again, with having hung hydraulic pressure (electronic) vibrating hammer 1, flange 2 and special fixture 3 and chuck 4, tight outer steel casing 6 tops of clamping start hydraulic pressure (electronic) vibrating hammer 1, make outer steel casing 6 sink to soil layer design and construction absolute altitude place fast, unclamp clamping fixture head 4, remove hydraulic pressure (electronic) vibrating hammer;
Two, according to the signal of Fig. 3, by loop wheel machine again interior steel casing 7 hang sink to the position 6 positions of outer steel casing on locate, open outer open form interlock steel flap valve circular groups plywood (as shown in Figure 4), temporary fixed by the digging machine that has telescopic arm again, again with having hung hydraulic pressure (electronic) vibrating hammer 1, flange 2 and special fixture 3 and chuck 4, bury by a bit of interior steel casing of gravity sinking earlier in steel casing 7 tops in the clamping tightly, put steel casing spacing block 13 in outer steel casing 6 top assigned addresses well this moment again.Start hydraulic pressure (electronic) vibrating hammer 1, steel casing 7 and interlock steel flap valve annular slab shoe 10 sink to soil layer design and construction absolute altitude place along outer steel casing inwall fast in making, and unclamp clamping fixture head 4, remove hydraulic pressure (electronic) vibrating hammer;
Three, the reinforcing cage of having made is hung onto in the thin-walled inner chamber of Cheng Haokong, after the reinforcing cage localization examination is finished, can be connected with concrete from outer steel casing top and irritate entrance 5 fluid concretes.After concrete pouring is finished, with having hung hydraulic pressure (electronic) vibrating hammer 1, flange 2 and special fixture 3 and chuck 4, native plate 14 tops are pressed in clamping, start hydraulic pressure (electronic) vibrating hammer 1, the heavy densification draining of the fast ram compression of earth pillar soil in making by firming panel assembly 14 in the steel casing 7, the low-pressure drainage system 12 in starting simultaneously on the steel casing wall 7 draws water.After finishing, hang out hydraulic pressure (electronic) vibrating hammer 1, put down firming panel assembly 14, unclamp clamping fixture head 4, re-move hydraulic pressure (electronic) vibrating hammer 1 again and clamp interior steel casing 7 tops, after 5 seconds were vibrated for by elder generation, steel casing 7 in beginning is pulled out slowly, check the enough amounts of the concrete that has watered in the thin-walled chamber, just add concrete inadequately to the absolute altitude place that designes and constructes.After interior steel casing 7 is extracted, directly hang next flow process sunk to the position 6 positions of outer steel casing on locate.
Specific implementation method and result
1) puts the cast-in-place thin wall concrete composite pile of the major diameter type of reinforcing cage
In having finished above-mentioned patented technology constructure scheme after one, two steps, can hang onto the reinforcing cage of having made in the thin-walled inner chamber of Cheng Haokong, after the reinforcing cage localization examination is finished, can be connected with concrete from outer steel casing top and irritate entrance 5 fluid concretes.After concrete pouring is finished, with having hung hydraulic pressure (electronic) vibrating hammer 1, flange 2 and special fixture 3 and chuck 4, clamp firming panel assembly 14 tops, start hydraulic pressure (electronic) vibrating hammer 1, the heavy densification of the fast ram compression of earth pillar soil in making by firming plate 14 in the steel casing 7, the low-pressure drainage system 12 in starting simultaneously on the steel casing wall 7 draws water.After finishing, hang out hydraulic pressure (electronic) vibrating hammer 1, put down firming panel assembly 14, unclamp clamping fixture head 4, re-move hydraulic pressure (electronic) vibrating hammer 1 again and clamp interior steel casing 7 tops, after 5 seconds were vibrated for by elder generation, steel casing 7 in beginning is pulled out slowly, check the enough amounts of the concrete that has watered in the thin-walled chamber, just add concrete inadequately to the absolute altitude place that designes and constructes.After interior steel casing 7 is extracted, directly hang next flow process and sunk on 6 positions of outer steel casing of position and locate, and repeat in the above-mentioned patented technology constructure scheme two, step.Turn back, just preceding step at home and abroad steel casing 6 extract at a slow speed, directly hang next flow process, continue to repeat to finish in the above-mentioned patented technology constructure scheme one, step.
2) cast-in-place thin-walled plain concrete composite pile type
In having finished above-mentioned patented technology constructure scheme one, two steps and checked after, can directly be connected with concrete and irritate entrance 5 fluid concretes from outer steel casing 6 tops.After concrete pouring is finished, with having hung hydraulic pressure (electronic) vibrating hammer 1, flange 2 and special fixture 3 and chuck 4, clamp firming panel assembly 14 tops, start hydraulic pressure (electronic) vibrating hammer 1, the heavy densification of the fast ram compression of earth pillar soil in making by firming panel assembly 14 in the steel casing 7, the low-pressure drainage system 12 in starting simultaneously on the steel casing wall 7 draws water.After finishing, hang out hydraulic pressure (electronic) vibrating hammer 1, put down firming panel assembly 14, unclamp clamping fixture head 4, re-move hydraulic pressure (electronic) vibrating hammer 1 again and clamp interior steel casing 7 tops, after 5 seconds were vibrated for by elder generation, steel casing 7 in beginning is pulled out slowly, check the enough amounts of the concrete that has watered in the thin-walled chamber, just add concrete inadequately to the absolute altitude place that designes and constructes.After interior steel casing 7 is extracted, directly hang next flow process and sunk on 6 positions of outer steel casing of position and locate, and repeat in the above-mentioned patented technology constructure scheme two, step.Turn back, just preceding step at home and abroad steel casing 6 extract at a slow speed, directly hang next flow process, continue to repeat to finish in the above-mentioned patented technology constructure scheme one, step.
3) inner chamber earth pillar soil high-pressure slip-casting+the put cast-in-place thin wall concrete composite pile type of reinforcing cage
In having finished above-mentioned patented technology constructure scheme after one, two steps, the reinforcing cage of having made is hung onto in the thin-walled chamber of Cheng Haokong, after the reinforcing cage localization examination is finished, can be connected with concrete from outer steel casing 6 tops and irritate entrance 5 fluid concretes.After concrete pouring is finished, with having hung hydraulic pressure (electronic) vibrating hammer 1, flange 2 and special fixture 3 and chuck 4, clamp firming panel assembly 14 tops, start hydraulic pressure (electronic) vibrating hammer 1, the heavy densification of the fast ram compression of earth pillar soil in making by firming plate 14 in the steel casing 7, the low-pressure drainage system 12 in starting simultaneously on the steel casing wall 7 draws water.After finishing, utilize the high-pressure slip-casting system 11 that is connected in advance in the interior steel casing wall 7 to cooperate the high-pressure slip-casting pipes that earth pillar soil is implemented high-pressure slip-casting.After finishing, hang out hydraulic pressure (electronic) vibrating hammer 1, put down firming panel assembly 14, unclamp clamping fixture head 4, re-move hydraulic pressure (electronic) vibrating hammer 1 again and clamp interior steel casing 7 tops, after 5 seconds were vibrated for by elder generation, steel casing 7 in beginning is pulled out slowly, check the enough amounts of the concrete that has watered in the thin-walled chamber, just add concrete inadequately to the absolute altitude place that designes and constructes.After interior steel casing 7 is extracted, directly hang next flow process and sunk on 6 positions of outer steel casing of position and locate, and repeat in the above-mentioned patented technology constructure scheme two, step.Turn back, just preceding step at home and abroad steel casing 6 extract at a slow speed, directly hang next flow process, continue to repeat to finish in the above-mentioned patented technology constructure scheme one, step.
4) the inner chamber earth pillar soil cast-in-place thin wall concrete composite pile type of reinforcing cage that fetches earth+put
In having finished above-mentioned patented technology constructure scheme after one, two steps, can hang onto the reinforcing cage of having made in the thin-walled inner chamber of Cheng Haokong, after the reinforcing cage localization examination is finished, can be connected with concrete from outer steel casing 6 tops and irritate entrance 5 fluid concretes.After concrete pouring was finished, earlier the steel casing began to pull out slowly 5 seconds in the vibration, checks the enough amounts of the concrete that has watered in the thin-walled chamber, just continuously added concrete to the absolute altitude place that designes and constructes inadequately.After interior steel casing 7 is extracted, directly hang next flow process and sunk on 6 positions of outer steel casing of position and locate, and repeat in the above-mentioned patented technology constructure scheme two, step.Turn back, just preceding step at home and abroad steel casing 6 extract at a slow speed, directly hang next flow process, continue to repeat to finish in the above-mentioned patented technology constructure scheme one, step.Treat that the thin wall concrete intensity of having built reaches at 75% o'clock, can adopt screw drilling machine (or artificial) that inner chamber earth pillar soil is taken out.Satisfy the instructions for use of different designs function.
The above; it only is preferable case study on implementation in the utility model patented technology constructure scheme; every trickle modification of above case study on implementation being done according to the utility model patented technology of any essence, be equal to and replace and improve, all should be included within the protection domain of the utility model patented technology scheme.
Claims (5)
1. perforating device that is used for the cast-in-place thin wall concrete composite pile of major diameter, comprise medium-high frequency vibrating hammer and special fixture device, outer steel casing, interior steel casing, it is characterized in that: the bottom of steel casing is hinged with the ring-like plate of a circle multi-disc interlock steel flap valve in described, and the radially outer shroud edge of the ring-like plate of this interlock steel flap valve is close to outer steel cylinder inwall and is kept steel flap valve plate to slide up and down; Described medium-high frequency vibrating hammer device all by the special fixture chuck with the clamping of inside and outside steel casing, unclamp and be connected; The top of described outer steel casing is provided with concrete and pours into mouth.
2. perforating device according to claim 1 is characterized in that: described outer steel casing top is provided with a plurality of spacing blocks and interior steel casing is isolated.
3. perforating device according to claim 1 is characterized in that: also be provided with low-pressure drainage system on the inwall of steel casing in described.
4. perforating device according to claim 1 is characterized in that: also be provided with the high-pressure slip-casting system on the inwall of steel casing in described.
5. perforating device according to claim 1 is characterized in that: also comprise the firming plate, the cross section coupling of the shape of this plate size and interior steel casing, can with medium-high frequency vibrating hammer device by the special fixture chuck with the clamping of firming panel assembly, unclamp and be connected.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202878747U CN201826302U (en) | 2010-08-01 | 2010-08-01 | Boring device for large-diameter cast-in-situ thin-walled concrete composite pile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202878747U CN201826302U (en) | 2010-08-01 | 2010-08-01 | Boring device for large-diameter cast-in-situ thin-walled concrete composite pile |
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| CN201826302U true CN201826302U (en) | 2011-05-11 |
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| CN2010202878747U Expired - Fee Related CN201826302U (en) | 2010-08-01 | 2010-08-01 | Boring device for large-diameter cast-in-situ thin-walled concrete composite pile |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102345287A (en) * | 2010-08-01 | 2012-02-08 | 常雷 | Construction method of large-diameter cast-in-situ thin-wall concrete composite pile and special hole forming device |
| CN102797262A (en) * | 2011-05-26 | 2012-11-28 | 常雷 | Construction method for cast-in-situ triangular composite foundation pile and special hole former therefor |
| CN102808406A (en) * | 2011-06-01 | 2012-12-05 | 常雷 | Construction method for row composite piling wall and special hole forming machine |
| CN102828507A (en) * | 2011-06-13 | 2012-12-19 | 常雷 | Construction method and special hole former for large-diameter cast-in-situ concrete composite pile |
| CN104005409A (en) * | 2014-06-09 | 2014-08-27 | 福建永强岩土股份有限公司 | Large-diameter cavity long spiral thin-wall pouring pile sleeve and pile-forming construction method |
| CN117605023A (en) * | 2024-01-23 | 2024-02-27 | 中铁建工集团有限公司 | Bored pile construction device and construction method thereof |
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2010
- 2010-08-01 CN CN2010202878747U patent/CN201826302U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102345287A (en) * | 2010-08-01 | 2012-02-08 | 常雷 | Construction method of large-diameter cast-in-situ thin-wall concrete composite pile and special hole forming device |
| CN102345287B (en) * | 2010-08-01 | 2015-02-25 | 常雷 | Construction method of large-diameter cast-in-situ thin-wall concrete composite pile forming device |
| CN102797262A (en) * | 2011-05-26 | 2012-11-28 | 常雷 | Construction method for cast-in-situ triangular composite foundation pile and special hole former therefor |
| CN102797262B (en) * | 2011-05-26 | 2016-08-03 | 常雷 | The construction treating methods of cast-in-situ triangular compound foundation pile |
| CN102808406A (en) * | 2011-06-01 | 2012-12-05 | 常雷 | Construction method for row composite piling wall and special hole forming machine |
| CN102808406B (en) * | 2011-06-01 | 2016-09-07 | 常雷 | The construction treating methods of townhouse composite pile wall |
| CN102828507A (en) * | 2011-06-13 | 2012-12-19 | 常雷 | Construction method and special hole former for large-diameter cast-in-situ concrete composite pile |
| CN102828507B (en) * | 2011-06-13 | 2015-11-25 | 常雷 | The construction treating methods of major diameter cast-in-situ concrete composite pile |
| CN104005409A (en) * | 2014-06-09 | 2014-08-27 | 福建永强岩土股份有限公司 | Large-diameter cavity long spiral thin-wall pouring pile sleeve and pile-forming construction method |
| CN104005409B (en) * | 2014-06-09 | 2016-05-04 | 福建永强岩土股份有限公司 | Major diameter cavity long spiral thin wall filling pile pipe casing and bore forming method |
| CN117605023A (en) * | 2024-01-23 | 2024-02-27 | 中铁建工集团有限公司 | Bored pile construction device and construction method thereof |
| CN117605023B (en) * | 2024-01-23 | 2024-03-22 | 中铁建工集团有限公司 | Bored pile construction device and construction method thereof |
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Granted publication date: 20110511 Termination date: 20180801 |
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| CF01 | Termination of patent right due to non-payment of annual fee |