CN101798813A - Construction method for sinking or pulling concrete preformed pile by using vibrohammer - Google Patents
Construction method for sinking or pulling concrete preformed pile by using vibrohammer Download PDFInfo
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- CN101798813A CN101798813A CN 201010126837 CN201010126837A CN101798813A CN 101798813 A CN101798813 A CN 101798813A CN 201010126837 CN201010126837 CN 201010126837 CN 201010126837 A CN201010126837 A CN 201010126837A CN 101798813 A CN101798813 A CN 101798813A
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Abstract
The invention relates to a construction method for sinking or pulling a concrete preformed pile by using a vibrohammer, in particular to a method for sinking a concrete preformed pile section into soil or pulling out the concrete preformed pile section from the soil by using the vibrohammer through utilizing exciting force step by step. The used tools comprise a vibrohammer, a pile gripper, a pile follower and a pile frame. The vibrohammer adopts an electrically-driven type vibrohammer with adjustable frequency and adjustable amplitude and can also adopt an eccentric moment adjustable type hydraulic vibrohammer. The vibrohammer not only has adjustable working frequency but also can adjust both the working moment and the amplitude as required under the condition of having a dependable base. Compared with a traditional construction method, the invention has high working efficiency, reliable working and strong applicability. The adopted pile gripper can ensure uniform radial stress at the periphery of the concrete preformed pile section in the process of clamping the concrete preformed pile section, increases or reduces the clamping force slowly, can avoid destructive impact and emergent looseness in the working process and is beneficial to ensure the working safety, the reliability and the construction quality and progress.
Description
Technical field
The invention relates to civil construction project foundation pile construction method, more particularly, is about sinking to or extract the method for concrete precast pile.
Background technology
The existing job practices that sinks to concrete precast pile has cartridge type diesel hammer driven pile method and pile jacking in method.
1, cartridge type diesel hammer driven pile job practices: the impulse machine energy that the instant impact hammering stake top when utilizing the free-falling of cartridge type diesel hammer is produced, overcome the resistance of the soil body to stake, destroy the static balancing state of the soil body, thereby cause pile body to sink; Hammering stake top makes pile body continue until design elevation, to finish the overall process of pile sinking in the injection soil repeatedly.Its shortcoming is to produce three overall situation public hazards in pile driving process: the noise height, and vibration is big, and the many and greasy dirt of oil smoke splashes, so is very limited in constructions such as the housing group in city and public building groups.
2, static pressure pile-sinking job practices: in the stake process of press in, as reaction force, overcome pile side resistance and end resistance in the piling process, progressively stake is sunk in the soil,, finish the overall process of pile sinking until design elevation with the weight of stake machine own and counterweight.Its shortcoming is that piling equipment and counterweight are heavy, and tonnage is very big, the inside and outside transhipment difficulty in place, and freight charges are high; In the time of a little less than the construction plant is softer, easily produce the machine accident that falls into; Require the skirt piles center bigger to the distance of existing building.
Existing job practices of extracting concrete precast pile, according to the introduction of " construction technology magazine " 2005 the 1st phase documents " discussion of deep layer foundation pile extraction technique ", the cover brill hangs out method and the punching of sleeve block stamp hangs out method to have sleeve to follow up.
1, sleeve follow-up cover bores and hangs out method: be to utilize steel sleeve to be enclosed within former pile tube periphery follow pipe rotary drilling, steel sleeve adopts the merogenesis flange to refute and connects, the pile tube periphery soil body bore remove after, with crane pile tube is hung out also segmentation dismounting again.Its shortcoming is the job practices complexity; Advance managed interior spatial constraints with pipe bit and often can not reach projected depth; The adpting flange spillage of sleeve pipe reduces mud pressure in the sleeve pipe.
2, the punching of sleeve block stamp hangs out method: be to utilize special telescopic drill hammer, be enclosed within former pile tube periphery and carry out percussion drilling, the soil body of pile tube periphery dash remove after, pile tube is hung out and the segmentation dismounting with crane again.Its shortcoming is the job practices complexity, and efficiency of construction is low.Usually hang out method based on sleeve follow-up cover brill in the construction, the sleeve block stamp punching method of hanging out is auxilliary, promptly when rotary drilling can not be implemented, is aided with the impact holing method.
Summary of the invention
The purpose of this invention is to provide a kind of method, overcome some shortcomings that exist in the prior art, thereby guarantee the construction quality of heavy pulling concrete preformed pile and accelerate speed of application with the heavy pulling concrete preformed pile of vibrohammer.
For achieving the above object, the present invention adopts following technical scheme:
A kind ofly sink to the job practices of concrete precast pile, it is characterized in that construction sequence is as follows with vibrohammer:
Step 1-1, march into the arena vibrohammer, concrete precast pile joint, pile chuck and pile frame in place, the concrete precast pile joint places in the pile frame, the top of concrete precast pile joint is clamped in the pile chuck that adopts armful pressure mode, and pile chuck is positioned at the below of vibrohammer;
Step 1-2, with center, align piles position vertically, the axle center of concrete precast pile joint;
Step 1-3, Vibration on Start-up pile monkey progressively sink to the concrete precast pile joint in the soil with exciting force;
Step 1-4, pile chuck is unclamped, and the upper end that moves to another root concrete precast pile joint clamps, the lower end spreading of another root concrete precast pile joint is connected on the concrete precast pile joint, and the Vibration on Start-up pile monkey progressively sinks to two joint concrete precast pile joints in the soil with exciting force; So the concrete precast pile joint is pursued the joint spreading;
Step 1-5, remove pile chuck, in the upper end of another root concrete precast pile joint Pile feeder is installed, the Vibration on Start-up pile monkey adopts Pile feeder technology, and each concrete precast pile joint that has buried is drowned into design elevation;
Step 1-6, taking-up Pile feeder are removed pile frame, vibrohammer and pile chuck, finish pile sinking.
Described vibrohammer is the electronically driven vibrohammer that adopts Frequency Adjustable amplitude modulation.
Described vibrohammer is to adopt eccentric moment adjustable hydraulic vibrohammer.
Described pile chuck is hugging pressure type pile chuck or top pressing type pile chuck.
The Vibration on Start-up pile monkey is as follows with the method that each concrete precast pile joint sinks in the soil among described step 1-3 and the step 1-5:
(a1), select vibration frequency, Vibration on Start-up pile monkey when eccentricity is zero;
(b1), be 20% of maximum eccentric moment～30% o'clock starting of oscillation in eccentric moment;
(c1), regulate step by step by 5%～25% of maximum eccentric moment and increase progressively exciting force;
(d1), before stopping vibration, make the eccentric moment self-zeroing.
A kind of job practices of extracting concrete precast pile with vibrohammer is characterized in that construction sequence is as follows:
Step 2-1, pile frame, vibrohammer and pile chuck are marched into the arena in place;
The top of step 2-2, the concrete precast pile that will bury is clamped in adopts in the pile chuck of embracing the pressure mode;
Step 2-3, Vibration on Start-up pile monkey are progressively extracted concrete precast pile with exciting force;
Step 2-4, unclamp pile chuck, remove pile frame, vibrohammer and pile chuck are finished pile pulling.
Described vibrohammer is the electronically driven vibrohammer that adopts Frequency Adjustable amplitude modulation.
Described vibrohammer is to adopt eccentric moment adjustable hydraulic vibrohammer.
Described pile chuck is the hugging pressure type pile chuck.
The method that the Vibration on Start-up pile monkey is progressively extracted concrete precast pile among the described step 2-3 is as follows:
(a2), select the maximum vibration frequency, Vibration on Start-up pile monkey when eccentric moment is zero;
(b2), regulate eccentric moment, the big exciting force enforcement of selection vibration;
(c2), concrete precast pile has when sinking to occurring slightly after fully vibrating, and regulates eccentric moment, selects less exciting force to begin to go up the pulling concrete preformed pile;
(d2), according on pull out velocity variations, regulate eccentric moment, reduce exciting force step by step, extract until safety;
(e2), before stopping vibration, make the eccentric moment self-zeroing.
The present invention has following characteristics and beneficial effect: the present invention has avoided cartridge type diesel hammer driven pile method noise height, the environment pollution that vibration is big, oil smoke is many, greasy dirt splashes, also avoided adopting the static pressed pile equipment of the big heaviness of body, transition freight charges height easily produces the problem that falls into the machine accident.Dual-use of the present invention, light and flexible, high efficiency has significantly reduced the transition freight charges, and it is heavy that to pull out construction all applicable.Not only operating frequency is adjustable for the electronically driven vibrohammer of employing realization FMAM or eccentric moment adjustable hydraulic vibrohammer, and work moment and amplitude all can be adjustable as required under evidence-based situation, the original pile body that is difficult to sink to pull out is become to be easy to, and reliable operation, applicability is strong.Compare with existing sinking to the job practices of extracting concrete precast pile joint, heavyly pull out efficient and can improve 10-50%, the time of heavy pile pulling has shortened 1/5-1/2, has accelerated construction speed greatly.Adopt pile chuck clamping pile body; radial force is even on every side in accepting clamping process can to guarantee the concrete precast pile joint; and slowly increase or reduce chucking power; can avoid damaging impact and sudden unclamping in the course of work; help guaranteeing job security, reliability, construction quality, reduced construction cost.
Description of drawings
The present invention will be further described in detail below in conjunction with accompanying drawing.
Fig. 1 sinks to concrete precast pile construction process figure with vibrohammer.
Fig. 2 sinks to concrete precast pile step 1-1 schematic diagram with vibrohammer.
Fig. 3 sinks to concrete precast pile step 1-2 schematic diagram with vibrohammer.
Fig. 4 sinks to concrete precast pile step 1-3 schematic diagram with vibrohammer.
Fig. 5 sinks to concrete precast pile step 1-4 schematic diagram with vibrohammer.
Fig. 6 sinks to concrete precast pile step 1-5 schematic diagram with vibrohammer.
Fig. 7 sinks to concrete precast pile step 1-6 schematic diagram with vibrohammer.
Fig. 8 extracts concrete precast pile construction process figure with vibrohammer.
Fig. 9 extracts concrete precast pile step 2-1 schematic diagram with vibrohammer.
Figure 10 extracts concrete precast pile step 2-2 schematic diagram with vibrohammer.
Figure 11 extracts concrete precast pile step 2-3 schematic diagram with vibrohammer.
Figure 12 extracts concrete precast pile step 2-4 schematic diagram with vibrohammer.
Reference numeral: 1-vibrohammer, 2-pile chuck, 3-concrete precast pile joint, another root concrete precast pile joint of 4-, 5-Pile feeder.
The specific embodiment
The embodiment that sinks to concrete prefabricated pile construction method with vibrohammer is referring to Fig. 1～shown in Figure 7, and construction sequence is as follows:
Step 1-1 sees Fig. 2, marches into the arena vibrohammer 1, concrete precast pile joint 3, pile chuck 2 and pile frame in place, concrete precast pile joint 3 places in the pile frame, the top of concrete precast pile joint 3 is clamped in the pile chuck 2 that adopts armful pressure mode, and pile chuck 2 is positioned at the below of vibrohammer 1.
Step 1-2 sees Fig. 3, with center, align piles position vertically, the axle center of concrete precast pile joint 3.
Step 1-3 sees Fig. 4, Vibration on Start-up pile monkey 1, with exciting force concrete precast pile joint 3 is progressively sunk in the soil.
Step 1-4 sees Fig. 5, pile chuck 2 is unclamped, and the upper end that moves to another root concrete precast pile joint 4 clamps, the lower end spreading of another root concrete precast pile joint 4 is connected on the concrete precast pile joint 3, Vibration on Start-up pile monkey 1, with exciting force two joint concrete precast pile joints are progressively sunk in the soil, so the concrete precast pile joint is pursued the joint spreading.
Step 1-5 sees Fig. 6, removes pile chuck 2, in the upper end of another root concrete precast pile joint 4 Pile feeder 5 is installed, and Vibration on Start-up pile monkey 1 adopts pile follower technology, and each the concrete precast pile joint that has buried is drowned into design elevation.
Step 1-6 sees Fig. 7, takes out Pile feeder 5, removes pile frame, vibrohammer 1 and pile chuck 2, finishes pile sinking.
Described vibrohammer 1 is the electronically driven vibrohammer that adopts Frequency Adjustable amplitude modulation.
Described vibrohammer 1 is to adopt eccentric moment adjustable hydraulic vibrohammer.
Described pile chuck 2 is hugging pressure type pile chuck or top pressing type pile chuck.
Vibration on Start-up pile monkey 1 is as follows with concrete precast pile joint 3 methods that sink in the soil among described step 1-3 and the step 1-5:
(a1), select vibration frequency, Vibration on Start-up pile monkey 1 when eccentricity is zero.
(b1), be 20% of maximum eccentric moment～30% o'clock starting of oscillation in eccentric moment.
(c1), regulate step by step by 5%～25% of maximum eccentric moment and increase progressively exciting force.
(d1), before stopping vibration, make the eccentric moment self-zeroing.
The embodiment that extracts concrete prefabricated pile construction method with vibrohammer is referring to Fig. 8～shown in Figure 12, and construction sequence is as follows: step 2-1 sees Fig. 9, pile frame, and vibrohammer 1 and pile chuck 2 are marched into the arena in place.
The top of the concrete precast pile that step 2-2 sees Figure 10, will bury is clamped in adopts in the pile chuck 2 of embracing the pressure mode.
Step 2-3 sees Figure 11, Vibration on Start-up pile monkey 1, with exciting force concrete precast pile is progressively extracted.
Step 2-4 sees Figure 12, unclamps pile chuck 2, removes pile frame, and vibrohammer 1 and pile chuck are finished pile pulling.
Described vibrohammer 1 is the electronically driven vibrohammer that adopts Frequency Adjustable amplitude modulation.
Described vibrohammer 1 is to adopt eccentric moment adjustable hydraulic vibrohammer.
Described pile chuck 2 is hugging pressure type pile chucks.
The method that Vibration on Start-up pile monkey 1 is progressively extracted concrete precast pile among the described step 2-3 is as follows:
(a2), select the maximum vibration frequency, Vibration on Start-up pile monkey 1 when eccentric moment is zero;
(b2), regulate eccentric moment, the big exciting force enforcement of selection vibration;
(c2), concrete precast pile has when sinking to occurring slightly after fully vibrating, and regulates eccentric moment, selects less exciting force to begin to go up the pulling concrete preformed pile;
(d2), according on pull out velocity variations, regulate eccentric moment, reduce exciting force step by step, extract until safety;
(e2), before stopping vibration, make the eccentric moment self-zeroing.
Application example 1: implement to sink to the concrete prefabricated pile tube of PTC type with eccentric moment adjustable YZPJ100 type hydraulic vibrohammer, the long 24m of stake, stake footpath 400mm, PTCA type.The formation thickness in pile sinking place is followed successively by loose plain fill 0.7m, loose creek soil 0.77m, soft molding powder matter clay 1.02m, close slightly sandy silt is 7.15m 1., in 2. 5.97m of close sandy silt, below be plastic flow mud matter clay.
Test with multiple frequency and multiple exciting force, test result is as follows:
The 1st joint stake: (1) with exciting force 200kN, and (this moment eccentric moment be equivalent to maximum eccentric moment 20%), the beginning starting of oscillation, a stake deflection is 1m; (2) respectively with exciting force 300kN, 400kN, 500kN, 700kN and 1000kN vibration, the stake deflection is respectively 2m, 3.5m, 1.5m, 3.5m and 0.5m after.
The 2nd joint stake: (1) with exciting force 300kN(eccentric moment this moment be equivalent to maximum eccentric moment 30%), the beginning starting of oscillation; (2) respectively with exciting force 500kN and 1000kN vibration, the stake deflection is respectively 0.5m and 9.5m, and whole pile (totally two joints) bassets 2m.
Application example 2: the DZPJ120 electronically driven vibrohammer with FMAM implements to sink to the concrete prefabricated pile tube of PTC type, the long 12m of stake, stake footpath 400mm, PTCA type.The formation thickness in pile sinking place is followed successively by loose plain fill 0.7m, loose creek soil 0.77m, soft molding powder matter clay 1.02m, close slightly sandy silt is 7.15m 1., in 2. 5.97m of close sandy silt, below be plastic flow mud matter clay.
Test with multiple frequency and multiple exciting force, test result is as follows: (1) is 30Hz (corresponding to the 600rpm vibration number) with the frequency, and exciting force is that 160kN begins vibration, and the stake deflection is 2m; (2) be that 40Hz(is corresponding to the 800rpm vibration number again with the frequency), exciting force is the 280kN vibration, stake deflection once more is 2m:(3) be that 50Hz(is corresponding to the 1000rpm vibration number again with the frequency), exciting force is the 450kN vibration, stake deflection once more is 3m; (4) with each increase 1Hz frequency, promptly each vibration number increases by 20 times, observes the pile sinking effect; (5) find frequency at 50Hz-55Hz, promptly vibration number is in 1000 ~ 1100rpm scope, and the pile sinking effect is best; (6) last is that 1300rpm finishes last deflection with 65Hz.
Application example 3: with eccentric moment adjustable YZPJ100 type hydraulic vibrohammer, implement the concrete prefabricated pile tube pull of PTC type, the long 24m of stake, stake footpath 400mm, PTCA type (this stake is sunk in the soil expires 28 day time).The formation thickness in pile sinking place is followed successively by loose plain fill 0.7m, loose creek soil 0.77m, soft molding powder matter clay 1.02m, close slightly sandy silt is 7.15m 1., in 2. 5.97m of close sandy silt, below be plastic flow mud matter clay.
The pile pulling process is as follows: (1) regulates eccentric moment, selects suitable bigger exciting force to implement vibration, divides three vibrations: 1. exciting force 300kN, vibrate 0.5min; 2. exciting force 500kN vibrates 0.5min; 3. exciting force 1000kN vibrates 5min, and the stake side produces and liquefies after fully vibrating, and stake begins sinking.(2) regulate eccentric moment, select pile pulling on the less exciting force gradually: 1. exciting force reduces to 700kN from 1000kN, pulls out 2m in the vibration; 2. exciting force reduces to 600kN from 700kN, pulls out 3m in the vibration; 3. exciting force reduces to 500kN from 600kN, pulls out 5m in the vibration; 4. exciting force reduces to 400kN from 500kN, pulls out 5m in the vibration; (5) exciting force reduces to 300kN from 400kN, pulls out 5m in the vibration; (6) stop vibration after, the stake remainder is extracted by quiet pull out force.
Application example 4: the DZPJ120 type electronically driven vibrohammer with FMAM is implemented the concrete prefabricated pile tube pull of PTC type, the long 12m of stake, stake footpath 400mm, PTCA type.The formation thickness in pile sinking place is followed successively by loose plain fill 0.7m, loose creek soil 0.77m, soft molding powder matter clay 1.02m, close slightly sandy silt is 7.15m 1., in 2. 5.97m of close sandy silt, below be plastic flow mud matter clay.
Test with multiple frequency and multiple exciting force, test result is as follows: (1) is 30Hz(vibration frequency 600rpm with the frequency) start, exciting force is the 160kN starting of oscillation; Increase frequency gradually and reach 65Hz in 1min, exciting force is the 760kN vibration, unclamps wire rope, and making its pulling force is zero, treats that hammer has when sinking to change into and pulls out.(2) regulate eccentric moment, select pile pulling on the less exciting force gradually: 1. pulling out the 1m distance on slightly, is that exciting force is 450kN with frequency 50Hz, on pull out 3.5m; 2. frequency being changed into 45Hz is that exciting force is 360kN, on pull out 3.5m; 3. change frequency into 40Hz, promptly exciting force is 280kN, on pull out 3.5m.3) stop vibration after, the stake remainder is extracted by quiet pull out force.
Claims (10)
1. one kind is sunk to the job practices of concrete precast pile with vibrohammer, it is characterized in that construction sequence is as follows:
Step 1-1, march into the arena vibrohammer (1), concrete precast pile joint (3), pile chuck (2) and pile frame in place, concrete precast pile joint (3) places in the pile frame, the top of concrete precast pile joint (3) is clamped in the pile chuck (2) that adopts armful pressure mode, and pile chuck (2) is positioned at the below of vibrohammer (1);
Step 1-2, with center, align piles position vertically, the axle center of concrete precast pile joint (3);
Step 1-3, Vibration on Start-up pile monkey (1) progressively sink to concrete precast pile joint (3) in the soil with exciting force;
Step 1-4, pile chuck (2) is unclamped, and the upper end that moves to another root concrete precast pile joint (4) clamps, the lower end spreading of another root concrete precast pile joint (4) is connected on the concrete precast pile joint (3), Vibration on Start-up pile monkey (1) progressively sinks to two joint concrete precast pile joints in the soil with exciting force; So the concrete precast pile joint is pursued the joint spreading;
Step 1-5, remove pile chuck (2), in the upper end of another root concrete precast pile joint (4) Pile feeder (5) is installed, Vibration on Start-up pile monkey (1) adopts Pile feeder technology, and each concrete precast pile joint that has buried is drowned into design elevation;
Step 1-6, taking-up Pile feeder (5) are removed pile frame, vibrohammer (1) and pile chuck (2), finish pile sinking.
2. according to claim 1ly sink to the method for concrete precast pile with vibrohammer, it is characterized in that: described vibrohammer (1) is the electronically driven vibrohammer that adopts Frequency Adjustable amplitude modulation.
3. according to claim 1ly sink to the method for concrete precast pile with vibrohammer, it is characterized in that: described vibrohammer (1) is to adopt eccentric moment adjustable hydraulic vibrohammer.
4. describedly sink to the method for concrete precast pile with vibrohammer according to claim 2 or 3, it is characterized in that: described pile chuck (2) is hugging pressure type pile chuck or top pressing type pile chuck.
5. according to claim 3ly sink to the method for concrete precast pile with vibrohammer, it is characterized in that: Vibration on Start-up pile monkey (1) is as follows with the method that each concrete precast pile joint sinks in the soil among described step 1-3 and the step 1-5:
(a1), select vibration frequency, Vibration on Start-up pile monkey (1) when eccentricity is zero;
(b1), be 20% of maximum eccentric moment～30% o'clock starting of oscillation in eccentric moment;
(c1), regulate step by step by 5%～25% of maximum eccentric moment and increase progressively exciting force;
(d1), before stopping vibration, make the eccentric moment self-zeroing.
6. job practices of extracting concrete precast pile with vibrohammer is characterized in that construction sequence is as follows:
Step 2-1, pile frame, vibrohammer (1) and pile chuck (2) are marched into the arena in place;
The top of step 2-2, the concrete precast pile that will bury is clamped in adopts in the pile chuck (2) of embracing the pressure mode;
Step 2-3, Vibration on Start-up pile monkey (1) are progressively extracted concrete precast pile with exciting force;
Step 2-4, unclamp pile chuck (2), remove pile frame, vibrohammer (1) and pile chuck are finished pile pulling.
7. method of extracting concrete precast pile with vibrohammer according to claim 6 is characterized in that: described vibrohammer (1) is the electronically driven vibrohammer that adopts Frequency Adjustable amplitude modulation.
8. method of extracting concrete precast pile with vibrohammer according to claim 6 is characterized in that: described vibrohammer (1) is to adopt eccentric moment adjustable hydraulic vibrohammer.
9. describedly sink to the method for concrete precast pile with vibrohammer according to claim 7 or 8, it is characterized in that: described pile chuck (2) is the hugging pressure type pile chuck.
10. job practices of extracting concrete precast pile with vibrohammer according to claim 8 is characterized in that the method that Vibration on Start-up pile monkey (1) is progressively extracted concrete precast pile among the described step 2-3 is as follows:
(a2), select maximum vibration frequency, Vibration on Start-up pile monkey (1) when eccentric moment is zero;
(b2), regulate eccentric moment, the big exciting force enforcement of selection vibration;
(c2), concrete precast pile has when sinking to occurring slightly after fully vibrating, and regulates eccentric moment, selects less exciting force to begin to go up the pulling concrete preformed pile;
(d2), according on pull out velocity variations, regulate eccentric moment, reduce exciting force step by step, extract until safety;
(e2), before stopping vibration, make the eccentric moment self-zeroing.
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| CN 201010126837 CN101798813A (en) | 2010-03-18 | 2010-03-18 | Construction method for sinking or pulling concrete preformed pile by using vibrohammer |
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| CN106337414A (en) * | 2016-09-20 | 2017-01-18 | 上海振中机械制造有限公司 | Method for vibration impact holing and pile forming |
| CN108035352A (en) * | 2018-01-08 | 2018-05-15 | 贾羽威 | A kind of multistage pile pulling device |
| CN109487788A (en) * | 2019-01-04 | 2019-03-19 | 安徽恒坤地基基础工程有限公司 | A kind of pile driving equipment |
| CN110387879A (en) * | 2019-06-27 | 2019-10-29 | 中交第二航务工程局有限公司 | A kind of concrete filling pile construction method of hydraulic vibration hammer hidden pipe |
| CN114263179A (en) * | 2021-12-20 | 2022-04-01 | 中建四局土木工程有限公司 | Pile head pile feeding device for concrete tubular pile |
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| CN108035352A (en) * | 2018-01-08 | 2018-05-15 | 贾羽威 | A kind of multistage pile pulling device |
| CN108035352B (en) * | 2018-01-08 | 2018-11-16 | 泉州市诗展文化发展有限公司 | A kind of multistage pile pulling device |
| CN109487788A (en) * | 2019-01-04 | 2019-03-19 | 安徽恒坤地基基础工程有限公司 | A kind of pile driving equipment |
| CN110387879A (en) * | 2019-06-27 | 2019-10-29 | 中交第二航务工程局有限公司 | A kind of concrete filling pile construction method of hydraulic vibration hammer hidden pipe |
| CN114263179A (en) * | 2021-12-20 | 2022-04-01 | 中建四局土木工程有限公司 | Pile head pile feeding device for concrete tubular pile |
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Application publication date: 20100811 |