CN210507443U - Pile pulling device - Google Patents
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- CN210507443U CN210507443U CN201921439594.0U CN201921439594U CN210507443U CN 210507443 U CN210507443 U CN 210507443U CN 201921439594 U CN201921439594 U CN 201921439594U CN 210507443 U CN210507443 U CN 210507443U
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Abstract
The utility model discloses a pile pulling device, which comprises a full sleeve connected with a power head of a combined power hole-forming pile machine, wherein a sleeve type pile pulling device is fixed at the bottom end of the full sleeve, a plurality of groups of convex claws which are driven by an oil cylinder and can protrude towards the center of a pipe to form the bottom end of a waste pile to axially support or cut off the waste pile are arranged on the sleeve type pile pulling device, a plurality of alloy teeth are arranged on the inner surfaces of the convex claws, and the oil cylinder is connected with an oil pump and an oil tank arranged on the combined power hole-forming pile machine through a solenoid valve and an oil pipe; the bottom end of the sleeve type pile extractor is provided with a plurality of high-pressure water nozzles, and the high-pressure water nozzles are connected with a water pump which is arranged on the combined power pile forming machine and is connected with a water source through an electromagnetic valve and a high-pressure water pipe; the oil cylinder is also provided with a distance sensor for detecting the downward extension length of the piston rod, and the distance sensor is electrically connected with the controller. The convex column of this pile pulling device is accurate, reliable at the bottom of the pocket of old and useless stake, and the construction noise is little, once only extracts old and useless stake after rotatory extraction or cutting off, labour saving and time saving, and construction cycle is short, and the efficiency of construction is high.
Description
Technical Field
The utility model relates to an old and useless stake clearance technical field specifically says a pile pulling device.
Background
With the general popularization of urban extension and reconstruction projects and the rise of urban rail transit construction, the cleaning of waste piles left after the buildings are disassembled in the last century such as the eighth and the ninety years becomes a technical problem which needs to be faced by new high-rise buildings and urban rail transit. Two situations are generally faced: firstly, the waste pile is not more than 30 meters and can be pulled out at one time. And the other one is that the waste pile is as long as 60 meters, but meets the requirement of rail transit construction, and only the part of more than 30 meters is pulled out. The currently generally adopted method is to adopt destructive means such as hammering, rotary excavating or twisting off the old pile foundation and the like to clean the left hole after the old pile body is damaged, thereby wasting time and labor, having long construction period, low construction efficiency and large construction noise; or the whole sleeve is used for clamping the waste pile after penetrating into a certain depth by using a clamp with a spring control structure and the like, and then the waste pile is upwards pulled, but the clamping degree is difficult to control in actual operation, or the waste pile is clamped and broken to achieve the purpose of pulling out the whole waste pile, or the waste pile cannot be pulled out due to loose clamping; or the whole sleeve is utilized, a plurality of groups of cutting assemblies are arranged in the whole sleeve, the cutting assemblies are used for cutting the waste piles after the waste piles penetrate into a certain depth, and then the steel wire ropes of the crane are manually fixed on the upper section piles to lift the waste piles out of the ground. According to the knowledge of the applicant, at present, no ideal waste pile pulling device and method exist.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a can once only pull out pile pulling device of a whole old and useless stake.
The technical solution of the utility model is that, a pile pulling device is provided, which comprises a full sleeve connected with the power head of the combined power hole-forming pile machine, the bottom end of the full sleeve is fixed with a sleeve type pile pulling device, the sleeve type pile pulling device is provided with a plurality of convex claws which are driven by an oil cylinder and can protrude towards the center of the pipe to form an axial support for the bottom end of the waste pile, the oil cylinder is connected with an oil pump and an oil tank arranged on the combined power hole-forming pile machine through an electromagnetic valve and oil pipes arranged in the sleeve of the pile pulling device and the full sleeve; the bottom end of the sleeve type pile extractor is provided with at least one high-pressure water spray head, and the high-pressure water spray head is connected with a water pump which is arranged on the combined power hole forming pile machine and is connected with a water source through an electromagnetic valve, high-pressure water pipes arranged in a sleeve pipe of the pile extractor and a full sleeve pipe; the oil cylinder is also provided with a distance sensor for detecting the downward extension length of the piston rod, and the distance sensor is electrically connected with a controller of the combined power hole forming pile machine through a lead arranged in the sleeve of the pile extractor and the full sleeve.
After the structure more than adopting, the utility model discloses pile pulling device has following advantage: put the shortcoming of having overcome above prior art's pile pulling device, the rotatory in-process that sinks of bushing type pile extractor adopts high pressure water washing, after the predetermined degree of depth, reuse hydro-cylinder carries out axial support to old and useless stake on to be known as the pocket bottom or hold in the palm the bottom, if the controller is when not the pocket bottom according to distance sensor detection data determination, sink again until the pocket bottom, the projection is accurate, reliable to the support bottom of old and useless stake, the construction noise is little, can once only rotate and extract old and useless stake, time saving and labor saving, construction cycle is short, the efficiency of construction is high, provide an ideal pile pulling device for pulling out of old and useless stake in city extension transformation engineering and the city track traffic construction.
Furthermore, the four convex claws are uniformly arranged along the circumference of the sleeve type pile extractor. After the structure is adopted, the bottom supporting device formed by the four convex claws has better mechanical property and is more stable and reliable for supporting the bottom of the waste pile.
Furthermore, a plurality of alloy teeth capable of cutting off the waste pile when the convex claw protrudes towards the center of the pipe and is driven to rotate by the power head are arranged on the inner surface of the convex claw, and the bottom end of the waste pile comprises the bottom end of the cut waste pile. After the structure is adopted, under the condition that traffic track engineering only needs to pull out a section of waste pile such as a waste pile part more than 30 meters, the pile pulling device is adopted to cut off the waste pile and pull out the waste pile part more than 30 meters, the cutter abrasion is small, the working procedures are few, the operation of workers is simple, the construction efficiency is high, and the construction progress is fast.
Furthermore, the upper end of each oil cylinder is hinged to the upper end of the inner pipe wall and the outer pipe wall of the sleeve type pile extractor through a shaft, the lower end of a piston rod of each oil cylinder is hinged to the upper end of a first hinge arm, the lower end of the first hinge arm is hinged to the upper end of a second hinge arm, and the lower end of the second hinge arm is hinged to the lower end of the inner pipe wall and the outer pipe wall of the sleeve type pile extractor through a shaft; a plurality of notches for the first hinge arm and the second hinge arm to protrude towards the center of the pipe so as to axially support upwards or retract towards the pipe wall so as to return are formed in the inner pipe wall of the pipe-in-pipe pile extractor; the inner surfaces of the first hinge arm and the second hinge arm are provided with a plurality of alloy teeth; the oil cylinders drive the respective first hinge arms and the respective second hinge arms to protrude towards the center of the pipe through the respective piston rods, so that a plurality of convex claws which axially support and are symmetrical to the bottom end of the waste pile or the broken bottom end of the waste pile are formed. After the oil cylinder driven convex claw adopts the specific structure, the structure is simpler, the operation is more flexible, the cutter is less worn when needing to be cut off, the cutting is rapid and thorough, and the axial upward support of the waste pile is more stable and reliable.
Furthermore, after the first hinge arm and the second hinge arm are returned, the hinge arms are positioned in a space between the inner pipe wall and the outer pipe wall of the pipe pile extractor. After the structure is adopted, the sleeve type pile extractor rotationally sinks, namely, the bottom is not supported, and the waste pile is not cut off, so that the interference on the waste pile is avoided, the descending process of the sleeve type pile extractor is smoother, and the pile unloading is more convenient.
Furthermore, the distance sensor is a plurality of, and one on each hydro-cylinder is installed on the outer bottom end face of each hydro-cylinder, detects the distance change from the bottom end face of the distance sensor to the top face of the first articulated arm. After the structure is adopted, the detection result is more comprehensive and more accurate, and the distance sensor is more convenient to install and replace.
Furthermore, the high-pressure water nozzles are uniformly arranged along the circumference of the sleeve type pile extractor, and the nozzle of each high-pressure water nozzle faces outwards. After adopting above structure, the effect of high pressure impact earth grit is better.
Drawings
Fig. 1 is a schematic structural diagram of the pile pulling device of the utility model when connected to the combined power pore-forming device.
Fig. 2 is a schematic structural view of the pile extractor in the present invention when the post retracts (showing the oil pipe and water pipe and the wire).
Fig. 3 is a schematic longitudinal sectional view of the pile extractor of fig. 2.
Fig. 4 is a schematic structural view (showing a high-pressure water nozzle) of the pile extractor of the present invention when the convex column protrudes toward the center of the pipe.
Fig. 5 is a schematic longitudinal sectional view of the pile extractor of fig. 4.
The pile pulling device comprises a sleeve type pile extractor 1, a sleeve type pile extractor 2, a power head 3, a sliding rail 4, a full sleeve pipe 5, a main mast 6, a chassis 7, an oil cylinder 8, a high-pressure water pipe 9, a lead wire 10, an oil pipe 11, a shaft 12, a distance sensor 13, a first articulated arm 14, a second articulated arm 15, a convex claw 16, a piston rod 17, a high-pressure water nozzle 18, a notch 19 and alloy teeth.
Detailed Description
The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding the present invention, but the present invention is not limited thereto. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
As shown in fig. 1, 2, 3, 4 and 5
The utility model discloses pile pulling device, include the full sleeve pipe 4 of being connected with unit head 2 of combination power pore-forming stake machine. The connection can adopt flange connection or the connection mode of the prior art such as quick joint connection. The combined power hole-forming pile machine, like the hydraulic walking type pile machine in the prior art, generally comprises a chassis 6, a main mast 5, a slide rail 3 and a power head 2 which is driven by a winch and a traction rope and can slide up and down on the slide rail 3. The combined power hole-forming pile machine is also called a rotary pile driver, and also can be called a rotary pile driver or a rotary pile extractor.
The bottom end of the full casing pipe 4 is fixed with a casing pipe pile extractor 1. The fixing can be in the fixing mode of the prior art such as welding, flange connection or quick joint connection. The sleeve type pile extractor 1 is provided with a plurality of convex claws 1 which are driven by an oil cylinder 7 and can protrude towards the center of a pipe to form an axial upper support at the bottom end of the waste pile or a cutting device which is described below, and the oil cylinder 7 is connected with an oil pump and an oil tank arranged on the combined power hole forming pile machine through an electromagnetic valve and an oil pipe 10 arranged in the sleeve of the pile extractor and the full sleeve 4. The claws 15 are preferably four, but of course three, five, six, seven and eight claws arranged uniformly along the circumference of the telescopic pile driver 1. The axial upward support can also be called as bottom holding of the bottom end of the waste pile, or called as bottom support, and can also be called as axial limiting.
The oil cylinder 7 is also provided with a distance sensor 12 for detecting the downward extension length of the piston rod 16. The distance sensor 12 is electrically connected with the controller of the combined dynamic hole forming pile machine through a lead 9 arranged in the pile extractor sleeve and the full sleeve 4. As is known in the art, a cylinder is typically two oil pipes. Because a plurality of oil cylinders, such as four oil cylinders, are preferably synchronous actions, a distance sensor can be arranged on only one oil cylinder. Of course, the utility model discloses preferably, establish a distance sensor 12 on a plurality of distance sensor 12, every hydro-cylinder, its reliability and stability is stronger, and the testing result is more comprehensive more accurate. The distance sensor 12 is preferably installed on an outer bottom end surface of each cylinder 7, and detects a distance change from a bottom end surface of the distance sensor 12 to a top surface of a first hinge arm 13 described below. Of course, the distance sensor 12 may also be installed on the inner top end plate of each cylinder 7 to detect the distance change from the bottom end surface of the distance sensor 12 to the piston of the cylinder, and the distance sensor 12 is installed inside the cylinder 7 and is relatively slightly affected by mud and water, but is troublesome to install and replace.
The upper end of each oil cylinder 7 is hinged with the upper end of the inner and outer pipe walls of the double pipe pile extractor 1 through a shaft 11, the lower end of a piston rod 16 of each oil cylinder 7 is hinged with the upper end of a first hinge arm 13, the lower end of the first hinge arm 13 is hinged with the upper end of a second hinge arm 14, and the lower end of the second hinge arm 14 is hinged with the lower end of the inner and outer pipe walls of the double pipe pile extractor 1 through the shaft 11. The above-mentioned hinge joint of each cylinder 7 and the first hinge arm 13 and the second hinge arm 14 may be the following specific structure: the upper end of each oil cylinder 7 is rotatably connected with the middle part of the shaft 11, and the two ends of the shaft 11 are respectively fixed and riveted on the upper ends of the inner pipe wall and the outer pipe wall of the sleeve pipe pile extractor 1. The through hole of the lower end sleeve of the piston rod 16 of each cylinder 7 is rotatably connected with the middle part of a shaft 11, and the two ends of the shaft 11 are respectively fixed, such as riveted, with the respective through holes at the upper ends of the two first hinge arms 13. The lower ends of the two first hinge arms 13 are respectively fixed to, e.g., riveted to, both ends of a shaft 11, and the middle portion of the shaft 11 is rotatably connected to the upper end of the second hinge arm 14. The lower end of the second hinge arm 14 is pivotally connected to the middle of a shaft 11, and the two ends of the shaft 11 are fixed, e.g. riveted, to the lower ends of the inner and outer pipe walls of the pipe pile driver 1, respectively.
The inner pipe wall of the pipe extension pile driver 1 is provided with a plurality of notches 18 for the first and second hinge arms 13, 14 to project towards the centre of the pipe for axial jacking or to retract towards the pipe wall for return. In other words, the inner wall of the pipe extension type pile extractor 1 is provided with a plurality of, for example, four notches, for the respective first hinge arm 13 and the second hinge arm 14 to project toward the center of the pipe to axially support, i.e., axially limit the waste pile, or support the waste pile, or cut the waste pile, or retract toward the pipe wall to return. Of course, the notch 18 may also penetrate the bottom end of the inner pipe wall of the pipe pile extractor 1, or a notch may also be provided on the outer pipe wall of the pipe pile extractor 1, and the notch may also penetrate the bottom end of the outer pipe wall of the pipe pile extractor 1. After the first hinge arm 13 and the second hinge arm 14 are returned, the hinge arms are positioned in the space between the inner pipe wall and the outer pipe wall of the double pipe pile extractor 1. In other words, after return, all of the two articulated arms, including the teeth 19 described below, are located on the side of the casing pipe extractor 1 on the side of the plumb line of the inner wall of the inner pipe near the outer pipe wall. At this time, the axis of the piston rod 16 and the vertical center lines of the first hinge arm 13 and the second hinge arm 14 are generally on the same plumb line, which is certainly allowed when the two hinge arms are not on the same plumb line, but both hinge arms are located in the space between the inner pipe wall and the outer pipe wall of the telescopic pile extractor 1 after the telescopic pile extractor 1 is returned, that is, the vertical line of the inner wall of the telescopic pile extractor 1 is close to one side of the outer pipe wall, so as not to interfere the up-and-down movement of the telescopic pile extractor 1 along the waste pile. The first hinge arm 13 may also be referred to as a first hinge arm, and the second hinge arm 14 may also be referred to as a second hinge arm.
The inner surface of the jaw 15 is provided with a plurality of alloy teeth 19 capable of cutting the waste pile when the jaw 15 is protruded toward the center of the pipe and rotated by the power head 2, that is, the inner surfaces of the first hinge arm 13 and the second hinge arm 14 are provided with a plurality of alloy teeth 19, which is understood to mean the surface close to the center of the pipe. The alloy teeth 19 can be understood as picks, and can be square conical or conical. The bottom end of the waste pile comprises the bottom end of the cut waste pile. The oil cylinders 7 drive the respective first hinge arms 13 and second hinge arms 14 to protrude towards the center of the pipe through the respective piston rods 16, so that a plurality of convex claws 15 which axially support and are symmetrical to the bottom end of the waste pile or the bottom end of the broken waste pile are formed.
At least one high pressure water spray nozzle 17 is installed to 1 bottom of bushing type pile extractor, high pressure water spray nozzle 17 through the solenoid valve with locate pile extractor sleeve pipe and the full sheathed tube 4 in high pressure water pipe 8 with locate on the combination power pore-forming stake machine and be connected the water pump with the water source. The water source is provided with a water tank on the combined power hole forming pile machine or a water pool on the ground. It is understood that water pressure in the water pipe of more than 4 kg per square centimeter is generally called high-pressure water. The high-pressure water jet 17 may be a plurality of 4 as shown in the figure, which are uniformly arranged along the circumference of the pipe pile extractor 1, and preferably, the jet of each high-pressure water jet 17 faces outwards. Of course, the figure is only schematic, the number of the high-pressure water spray nozzles 17 can be any number of 5-16, the diameter and the shape of the high-pressure water spray nozzles 17 are also schematic in the figure, and the high-pressure water spray nozzles can also be large in diameter and other shapes.
The method for pile pulling construction by adopting the pile pulling device comprises the following steps:
①, the sleeve pipe pile extractor 1 at the lower end of the full sleeve pipe 4 is sleeved outside the waste pile to be extracted.
②, starting the combined power hole-forming pile driver, the controller operating the power head 2 to make the sleeve type pile extractor 1 rotate and sink and simultaneously starting the high-pressure water nozzle 17 to wash away the earth and gravel around the waste pile.
③, when the height of the plurality of claws 15 is lower than the bottom end of the waste pile to be pulled, if the height is reduced to 30 meters, the plurality of oil cylinders 7 are started to drive the piston rods 16 to drive the plurality of claws 15 to protrude towards the center of the pipe, and the controller judges whether the plurality of claws 15 are protruding towards the center of the pipe according to the signal transmitted back by the distance sensor 12.
If the plurality of convex claws 15 are not protruded to the center of the pipe in place, the controller operates the plurality of oil cylinders 7 to drive the piston rods 16 to drive the plurality of convex claws 15 to retract into the pipe wall of the sleeve type pile extractor 1, namely, the space between the inner pipe wall and the outer pipe wall, and then the controller operates the power head 2 to enable the sleeve type pile extractor 1 to continuously rotate and sink and keep using the high-pressure water spray nozzles 17 to wash away the earth gravels around the waste pile; the above operation is repeated until the signal transmitted back by the distance sensor indicates that the plurality of claws 15 are raised to the position toward the center of the pipe.
If the plurality of convex claws 15 are raised to the center of the pipe in place, the controller operates the power head 2 to rotate and pull the pile until the waste pile sleeved in the full casing pipe 4 and the casing pipe type pile extractor 1 is integrally lifted out of the ground. The high-pressure water nozzle 17 can be opened or closed during pile pulling. Or
If the waste pile needs to be cut off, after the ② step, sinking the multiple claws 15 to a preset pile cutting position, starting the multiple oil cylinders 7 to drive the piston rods 16 to drive the multiple claws 15 to protrude towards the center of the pipe, rotating and cutting the power head at the same time, and judging whether the multiple claws 15 protrude towards the center of the pipe in place or not by the controller according to signals returned by the distance sensor 12, namely whether the waste pile is cut off or not.
If the plurality of the convex claws 15 are judged not to be in place to protrude towards the center of the pipe, namely the waste pile is judged not to be cut off, the controller operates the plurality of the oil cylinders 7 to drive the piston rods 16 to drive the plurality of the convex claws 15 to continuously protrude towards the center of the pipe, the power head simultaneously rotates and cuts until the plurality of the convex claws 15 are judged to protrude towards the center of the pipe in place, namely, until the signals returned by the distance sensor 12 are judged that the plurality of the convex claws 15 protrude towards the center of the pipe in place through the controller.
If the plurality of convex claws 15 are raised to the center of the pipe in place, the controller operates the power head 2 to rotate and pull the pile until the waste pile sleeved in the full casing pipe 4 and the casing pipe type pile extractor 1, namely the cut waste pile of the upper section, is lifted out of the ground integrally.
④, the full casing 4 and the casing pipe pile extractor 1 are transferred to a pile unloading position such as a large trailer, the controller operates the oil cylinders 7 to drive the piston rods 16 to drive the convex claws 15 to retract into the space between the inner and outer pipe walls of the casing pipe pile extractor 1, and at the moment, the waste pile sleeved in the full casing 4 and the casing pipe pile extractor 1 falls on the pile unloading position such as the large trailer under the self gravity and is dragged away from the construction site.
Of course, the pile-pulling construction method may further include ⑤, backfilling in the left hole of the pulled-out waste pile.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a pile pulling device, includes full sleeve pipe (4) of being connected with unit head (2) of combination power hole-forming stake machine, its characterized in that: the bottom end of the full sleeve (4) is fixed with a sleeve type pile extractor (1), the sleeve type pile extractor (1) is provided with a plurality of convex claws (15) which are driven by an oil cylinder (7) and can protrude towards the center of a pipe to form an axial upward support for the bottom end of the waste pile, and the oil cylinder (7) is connected with an oil pump and an oil tank arranged on the combined power hole-forming pile machine through an electromagnetic valve and an oil pipe (10) arranged in the sleeve of the pile extractor and the full sleeve (4); the bottom end of the sleeve type pile extractor (1) is provided with at least one high-pressure water spray head (17), and the high-pressure water spray head (17) is connected with a water pump which is arranged on the combined power pile forming machine and is connected with a water source through an electromagnetic valve and a high-pressure water pipe (8) arranged in the sleeve of the pile extractor and the whole sleeve (4); the oil cylinder (7) is further provided with a distance sensor (12) for detecting the downward extending length of the piston rod (16), and the distance sensor (12) is electrically connected with a controller of the combined power hole forming pile machine through a lead (9) arranged in the pile extractor sleeve and the full sleeve (4).
2. The pile pulling device according to claim 1, wherein: the number of the convex claws (15) is four which are uniformly arranged along the circumference of the sleeve type pile extractor (1).
3. The pile pulling device according to claim 1, wherein: the inner surface of the convex claw (15) is provided with a plurality of alloy teeth (19) which can cut off the waste pile when the convex claw (15) protrudes towards the center of the pipe and is driven to rotate by the power head (2), and the bottom end of the waste pile comprises the bottom end of the cut waste pile.
4. A pile pulling device according to claim 1 or 3, wherein: the upper end of each oil cylinder (7) is hinged to the upper end of the inner pipe wall and the outer pipe wall of the sleeve type pile extractor (1) through a shaft (11), the lower end of a piston rod (16) of each oil cylinder (7) is hinged to the upper end of a first hinge arm (13), the lower end of the first hinge arm (13) is hinged to the upper end of a second hinge arm (14), and the lower end of the second hinge arm (14) is hinged to the lower end of the inner pipe wall and the outer pipe wall of the sleeve type pile extractor (1) through the shaft (11); a plurality of notches (18) for the first articulated arm (13) and the second articulated arm (14) to protrude towards the center of the pipe so as to axially support upwards or retract towards the pipe wall for returning are arranged on the inner pipe wall of the pipe-in-pipe pile extractor (1); the inner surfaces of the first hinge arm (13) and the second hinge arm (14) are provided with a plurality of alloy teeth (19); the oil cylinders (7) drive the respective first hinge arms (13) and second hinge arms (14) to protrude towards the center of the pipe through the respective piston rods (16), so that a plurality of convex claws (15) which are axially supported and symmetrical on the bottom end of the waste pile or the broken bottom end of the waste pile are formed.
5. Pile pulling apparatus according to claim 4, wherein: after the first hinge arm (13) and the second hinge arm (14) return, the hinge arms are both positioned in a space between the inner pipe wall and the outer pipe wall of the sleeve type pile extractor (1).
6. Pile pulling apparatus according to claim 4, wherein: the distance sensors (12) are multiple, one distance sensor is arranged on each oil cylinder (7), and the distance sensors are arranged on the outer bottom end face of each oil cylinder (7) and used for detecting the distance change from the bottom end face of each distance sensor (12) to the top face of the first hinged arm (13).
7. The pile pulling device according to claim 1, wherein: the high-pressure water spray heads (17) are uniformly arranged along the circumference of the sleeve type pile extractor (1), and the spray opening of each high-pressure water spray head (17) faces outwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921439594.0U CN210507443U (en) | 2019-08-30 | 2019-08-30 | Pile pulling device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921439594.0U CN210507443U (en) | 2019-08-30 | 2019-08-30 | Pile pulling device |
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| Publication Number | Publication Date |
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| CN210507443U true CN210507443U (en) | 2020-05-12 |
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| CN201921439594.0U Active CN210507443U (en) | 2019-08-30 | 2019-08-30 | Pile pulling device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110485422A (en) * | 2019-08-30 | 2019-11-22 | 宁波易和桩基工程技术开发有限公司 | Pile pulling device and its pile-pulling construction method |
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2019
- 2019-08-30 CN CN201921439594.0U patent/CN210507443U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110485422A (en) * | 2019-08-30 | 2019-11-22 | 宁波易和桩基工程技术开发有限公司 | Pile pulling device and its pile-pulling construction method |
| CN110485422B (en) * | 2019-08-30 | 2021-04-13 | 浙江易和岩土工程有限公司 | Pile pulling construction method of pile pulling device |
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Address after: 315000 22-1, building 6, hemeicheng Plaza, No. 666, yangmuqi Road, high tech Zone, Ningbo City, Zhejiang Province Patentee after: Zhejiang Yihe Geotechnical Engineering Co.,Ltd. Address before: 315000 22-1, building 6, hemeicheng Plaza, No. 666, yangmuqi Road, high tech Zone, Ningbo City, Zhejiang Province Patentee before: NINGBO YIHE PILE ENGINEERING TECHNOLOGY DEVELOPMENT Co.,Ltd. |
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Effective date of registration: 20220624 Address after: 315000 5-3, building 7, No. 199, Xiangyun North Road, high tech Zone, Ningbo, Zhejiang Patentee after: Zhejiang wanjian Construction Co.,Ltd. Address before: 22-1, building 6, hemeicheng Plaza, 666 yangmuqi Road, high tech Zone, Ningbo City, Zhejiang Province, 315000 Patentee before: Zhejiang Yihe Geotechnical Engineering Co.,Ltd. |