CN108425361B - Pile pulling device and application method thereof - Google Patents
Pile pulling device and application method thereof Download PDFInfo
- Publication number
- CN108425361B CN108425361B CN201810437148.XA CN201810437148A CN108425361B CN 108425361 B CN108425361 B CN 108425361B CN 201810437148 A CN201810437148 A CN 201810437148A CN 108425361 B CN108425361 B CN 108425361B
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- pile
- immersed tube
- bearing rod
- sliding grooves
- engineering
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D9/00—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof
- E02D9/02—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof by withdrawing
Abstract
The invention relates to a pile pulling device and an application method thereof. The pile pulling device comprises a sinking pipe, two inclined sliding grooves and a bearing rod, wherein the sinking pipe comprises a first end and a second end which are oppositely arranged; the two inclined sliding grooves are symmetrically arranged on the inner wall of the immersed tube, and extend from a position close to the second end to a direction far away from the second end; the bearing rod is positioned in the immersed tube, and two ends of the bearing rod are respectively positioned on the two inclined sliding grooves and slide along the inclined sliding grooves. According to the pile pulling device, the bearing rod capable of sliding along the inclined sliding groove is arranged at the end part of the immersed tube, the bearing rod can slide to the bottom of the engineering pile and support the bottom of the engineering pile to be pulled out, and the bearing rod is driven to move upwards when the immersed tube is pulled up, so that the purpose of pile pulling and obstacle removal is achieved, and the breadth and depth of influence on disturbance of soil on the pile side in the pile pulling process are reduced. In addition, the application and construction method of the pile pulling device is simple in steps, convenient to operate and suitable for popularization and application.
Description
Technical Field
The invention relates to the field of building construction, in particular to a pile pulling device and an application method thereof.
Background
Engineering piles have been widely used in urban construction as piles used in engineering to ultimately act under stress in buildings. However, as urban improvement increasingly goes into public view, building reconstruction and extension projects continue to rise in temperature, the bearing capacity (pile length and number) and settlement of foundation engineering piles of the original building cannot meet new construction requirements, and the situation that the positions of newly added or replaced engineering piles collide with the original old piles is increased.
Generally, the commonly used engineering pile obstacle clearing technology mainly comprises pile side high-pressure water vapor cutting, large excavation obstacle clearing, pile top hydraulic jacking and the like. However, the engineering pile obstacle clearing technology has the problem that the disturbance on the soil body at the pile side is greatly influenced in the pile pulling process.
Disclosure of Invention
Based on the above, it is necessary to provide a pile pulling device capable of reducing the influence on the disturbance of the soil on the pile side in the pile pulling process and an application method thereof, aiming at the problem that the disturbance of the soil on the pile side is greatly influenced in the pile pulling process.
A pile pulling apparatus comprising:
a immersed tube comprising a first end and a second end disposed opposite each other;
the two inclined sliding grooves are symmetrically arranged on the inner wall of the immersed tube and extend from a position close to the second end to a direction far away from the second end;
the bearing rod is positioned in the immersed tube, and two ends of the bearing rod are respectively positioned in the two inclined sliding grooves and slide along the inclined sliding grooves.
In one embodiment, the device further comprises a limiting piece, wherein the limiting piece is sleeved at the end part of the bearing rod.
In one embodiment, the cross section of the sinking pipe is circular, and the maximum distance between the two inclined sliding grooves is equal to the inner diameter of the sinking pipe.
In one embodiment, the cross section of the immersed tube is rectangular, and the distance between the two inclined sliding grooves is equal to the length of the side length of the rectangle.
In one embodiment, the included angle between the connecting line between the bottom and the top of the inclined chute and the cross section of the immersed tube is 40-50 degrees.
In one embodiment, the load bearing bar is a steel pin.
The application construction method of the pile pulling device comprises the following steps:
determining the position of an engineering pile to be pulled out, and sinking the immersed tube;
when the second end of the immersed tube contacts the engineering pile, the bearing rod moves upwards to the top of the inclined chute along the inclined chute under the extrusion of soil body along with the continuous sinking of the immersed tube;
when the bearing rod is sunk to the column bottom elevation position of the engineering pile along with the sinking pipe, the bearing rod moves from the top of the inclined chute to the bottom of the inclined chute along with the upward pulling of the sinking pipe under the action of the gravity of soil and the pile body of the engineering pile;
when the immersed tube continues to be pulled up, the bearing rod supports the bottom of the engineering pile, and then the engineering pile is pulled up.
When the pile pulling device is applied, the immersed tube is sunk according to the position of the engineering pile to be pulled, when the second end of the immersed tube is contacted with the engineering pile to be pulled, the bearing rod moves upwards along the inclined sliding groove and is clung to the side surface of the engineering pile to move downwards along the immersed tube under the extrusion of soil body and the engineering pile, when the bearing rod is sunk to the elevation position of the bottom of the engineering pile, the gravity of the soil body and the pile body of the engineering pile extrudes the bearing rod to the bottom end of the inclined sliding groove along the inclined sliding groove, namely, the position close to the second end of the immersed tube, and when the immersed tube is pulled up, the bearing rod supports the engineering pile and forms a whole with the immersed tube to pull out the bottom of the engineering pile support. According to the pile pulling device, the bearing rod capable of sliding along the inclined sliding groove is arranged at the end part of the immersed tube, and can slide to the bottom of the engineering pile and support the bottom of the engineering pile to be pulled out along with the sinking of the immersed tube to the bottom of the engineering pile along with the pile side of the engineering pile to be pulled out, so that the purpose of pile pulling and obstacle removal is achieved by driving the bearing rod to move upwards when the immersed tube is pulled up, the breadth and depth of the influence on soil disturbance on the pile side in the pile pulling process are reduced, the processing cost is saved, and the risk that the pile is broken easily when the pile is pulled out at the end part can be avoided. In addition, the application and construction method of the pile pulling device is simple in steps, convenient to operate and suitable for popularization and application.
Drawings
FIG. 1 is a cross-sectional view of a pile extractor according to an embodiment;
FIG. 2 is a top view of the pile extracting apparatus of FIG. 1 in position A-A;
FIG. 3 is a top view of the pile extracting apparatus of the alternative embodiment shown in FIG. 1, in position A-A;
fig. 4a-4d are views of the construction steps of an embodiment of a pile extractor.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1-2, a pile pulling device 10 according to an embodiment includes a immersed tube 100, two inclined sliding grooves 110 and a bearing rod 120, wherein the immersed tube 100 includes a first end 100a and a second end 100b disposed opposite to each other; the two inclined sliding grooves 110 are symmetrically arranged on the inner wall of the immersed tube 100, and the inclined sliding grooves 110 extend from a position close to the second end 100b towards a direction far away from the second end 100b; the bearing rod 120 is located inside the immersed tube 100, and two ends of the bearing rod 120 are respectively located in the two inclined sliding grooves 110 and slide along the inclined sliding grooves 110.
When the pile pulling device 10 is applied, the immersed tube 100 is sunk according to the position of the engineering pile to be pulled, when the second end 100b of the immersed tube 100 contacts the engineering pile to be pulled, the bearing rod 120 moves upwards along the inclined chute 110 under the extrusion of the soil body and the engineering pile and moves downwards along with the immersed tube 100 along with the side surface of the engineering pile, when the bearing rod 120 is sunk to the position of the elevation of the bottom of the engineering pile, the gravity of the soil body and the pile body of the engineering pile extrudes the bearing rod 120 to the bottom of the inclined chute 110 along with the upward pulling of the immersed tube 100, namely, the position close to the second end 100b of the immersed tube 100, and when the immersed tube 100 is pulled up, the bearing rod 120 supports the engineering pile and forms a whole with the immersed tube 100 to pull the bottom of the engineering pile. According to the pile pulling device 10, the bearing rod 120 capable of sliding along the inclined sliding groove 110 is arranged at the end part of the immersed tube 100, after the immersed tube 100 is sunk to the bottom of a pile along the pile side of an engineering pile to be pulled out, the bearing rod 120 can slide to the bottom of the engineering pile and support the bottom of the engineering pile to be pulled out, the bearing rod 120 is driven to move upwards when the immersed tube 100 is pulled up, the purpose of pile pulling and obstacle removing is achieved, the breadth and depth of influence on soil disturbance on the pile side in the pile pulling process are reduced, the processing cost is saved, and the risk that the pile is broken easily when the pile is pulled out at the end part can be avoided.
Immersed tube 100 is generally hollow and tubular and matches the shape of the engineered pile to be removed. For example, when the shape of the engineered pile is cylindrical, the cross section of the immersed tube 100 is correspondingly circular (as shown in fig. 2). And when the engineering pile is rectangular, a immersed tube 100 with a rectangular cross section is selected (as shown in fig. 3). In the pile pulling process, the immersed tube 100 is sleeved outside the engineering pile, so that the inner diameter of the immersed tube 100 (for example, when the immersed tube 100 is cylindrical) should be slightly larger than the outer diameter of the engineering pile, so as to facilitate sinking of the immersed tube 100 and reserve a certain space for movement of the bearing rod 120.
With continued reference to fig. 1 and 2, the immersed tube 100 includes a first end 100a and a second end 100b opposite to each other, and in practical use, the immersed tube 100 moves downward from the second end 100b and then is sleeved outside the engineering pile. Two inclined sliding grooves 110 are formed in the inner wall of the immersed tube 100, wherein the bottom of each inclined sliding groove 110 is close to the second end 100b of the immersed tube 100, and extends from the bottom to a direction away from the second end 100 b. The width of the inclined chute 110 is matched with the outer diameter of the bearing rod 120, so that the bearing rod 120 can slide along the inclined chute 110 under the action of external force. The distance between the bottom of the inclined chute 110 and the bottom of the immersed tube 100 can be selected according to practical needs.
Further, in the present embodiment, as shown in fig. 2, when the cross section of the immersed tube 100 is circular, the maximum distance between the two inclined sliding grooves 110 is equal to the inner diameter of the immersed tube 100. That is, the bottom ends of the two inclined sliding grooves 110 are respectively positioned at two ends of the inner diameter of the immersed tube 100. Therefore, when the two ends of the bearing rod 120 are respectively located at the bottoms of the two inclined sliding grooves 110, the bearing rod 120 is just located on the central line of the bottom of the immersed tube 100, and when the immersed tube 100 pulls up the engineering pile, the bearing rod 120 is also just located at the middle position of the bottom of the engineering pile, so that the engineering pile can be more stably supported, and the eccentric force in the pile pulling process is reduced.
In addition, as shown in fig. 3, in other embodiments, the cross section of the immersed tube 100 is rectangular, and the distance between two inclined sliding grooves 110 is equal to the length of the side of the rectangle. When the immersed tube 100 is in a hollow cuboid shape, two inclined sliding grooves 110 symmetrically arranged on the inner wall of the immersed tube 100 are parallel to each other, and the bottom ends of the inclined sliding grooves 110 are positioned on the central line of the cross section of the immersed tube 100. The arrangement can enable the bearing rod 120 to be just positioned at the bottom of the engineering pile when the engineering pile is pulled up, so that more stable bearing force is provided for the engineering pile.
When the immersed tube 100 is sunk, the bearing rod 120 moves upwards along the inclined chute 110 under the extrusion of soil body and the engineering pile until moving to the top of the inclined chute 110, and the bearing rod 120 moves closely to the outer side of the engineering pile during the sinking of the immersed tube 100. When the load-bearing rod 120 moves to the elevation position of the bottom of the engineering pile, the extrusion of the engineering pile is lost, and the load-bearing rod 120 moves downwards along the inclined chute 110 under the gravity of the load-bearing rod until the load-bearing rod moves to the bottom of the inclined chute 110. In this embodiment, the angle between the line between the bottom and the top of the diagonal chute 110 and the cross section of the immersed tube 100 is 40 ° -50 °. At this time, the horizontal force and the vertical force of the load-bearing rod 120 are substantially the same, which is beneficial for the automatic movement of the load-bearing rod 120 under the action of gravity. If the diagonal chute 110 is steeper, i.e., the angle between the line between the bottom and the top of the diagonal chute 110 and the cross section of the immersed tube 100 is greater than 50 °, the grooving length of the diagonal chute 110 is longer, the cutting effort is greater, and the stability of the immersed tube 100 is not facilitated. However, if the diagonal chute 110 is gentle, i.e., the angle between the line between the bottom and the top of the diagonal chute 110 and the cross section of the immersed tube 100 is less than 40 °, it is difficult to move the load-bearing bar 120 downward to the bottom of the diagonal chute 110. In the present embodiment, the angle between the line between the bottom and the top of the inclined chute 110 and the lateral surface of the immersed tube 100 is 45 °. In addition, the length of the inclined chute 110 may be selected according to the actual needs and the size of the immersed tube 100.
Referring to fig. 1 and fig. 2, in the present embodiment, the pile pulling device 10 further includes a limiting piece 130, and the limiting piece 130 is sleeved on the end portion of the bearing rod 120. The two ends of the bearing rod 120 are respectively located on the two inclined sliding grooves 110 and extend out of the immersed tube 100, and the limiting piece 130 is sleeved at the end of the bearing rod 120, i.e. the limiting piece 130 is located at the outer side of the outer wall of the immersed tube 100. The limiting piece 130 can prevent the bearing rod 120 from moving out of the inclined chute 110. In this embodiment, the limiting plate 130 is a steel plate. The load-bearing bar 120 is a steel pin.
The application of the pile pulling apparatus 10 is described below with reference to fig. 1 and fig. 4a-4d, and in one embodiment, the method of applying the pile pulling apparatus 10 includes the steps of:
step one, determining the position of the engineered pile 20 to be removed, sinking the immersed tube 100. For example, in fig. 4a, at second end 100b of immersed tube 100, it is lowered below ground P and moved in a direction approaching pile 20.
When the second end 100b of the immersed tube 100 contacts the engineering pile 20, the bearing rod 120 moves up along the inclined chute 110 to the top of the inclined chute 110 under the soil body extrusion as the immersed tube 100 continues to sink. As shown in fig. 4a, the load-bearing bar 120 is pressed to the top of the diagonal chute 110 and is abutted against the outer sidewall of the engineering pile 20. The load beam 120 then continues to sink with the immersed tube 100.
Step three, when the bearing rod 120 is sunk to the column bottom elevation position of the engineering pile 20 along with the sinking pipe 100, the bearing rod 120 moves from the top of the inclined chute 110 to the bottom of the inclined chute 110 under the gravity of the soil body and the pile body of the engineering pile 20 along with the sinking pipe 100 being pulled up. During the process that the load-bearing bar 120 is closely attached to the outer sidewall of the engineering pile 20 and is sunk with the sinking pipe 100, the load-bearing bar 120 is located at the top of the inclined chute 110 under the extrusion of the engineering pile 20 (as shown in fig. 4 b). When the load-bearing rod 120 is sunk to the pile bottom elevation of the engineering pile 20, the load-bearing rod 120 loses the extrusion of the engineering pile 20, and as the immersed tube 100 is pulled up, the load-bearing rod 120 moves down to the bottom of the inclined chute 110 under the action of its own gravity (as shown in fig. 4 c). And, the load-bearing bar 120 is pressed against the bottom of the diagonal chute 110 due to the gravity of the engineering pile 20 itself.
In step four, as shown in fig. 4d, when the immersed tube 100 continues to be pulled up, the bearing rod 120 supports the bottom of the engineering pile 20, and the pulling-out of the engineering pile 20 is completed. The load-bearing bars 120 hold the engineering piles 20, and the engineering piles 20 are pulled out with the lifting of the immersed tube 100.
The pile pulling device 10 is matched with a common pipe sinking process, and the bearing rod 120 moves upwards along the inclined chute 110 due to soil resistance in the pipe sinking process, so that the bottom of the pipe sinking 100 is automatically opened; when the immersed tube 100 conveys the bearing rod 120 to the pile bottom of the engineering pile 20, the gravity of the engineering pile 20 and the gravity of the bearing rod 120 are utilized to enable the bearing rod 120 to move downwards along the inclined chute 110 so as to support the engineering pile 20. That is, the load-bearing rod 120 and the immersed tube 100 together form a pile-pulling load-bearing force mechanism at the bottom of the engineering pile 20, and the engineering pile 20 is pulled out along with the lifting of the immersed tube 100.
The pile pulling device 10 can reduce the extent and depth of the disturbance influence on the soil body at the pile side in the pile pulling process, and compared with the general pile pulling barrier removing technology, the pile pulling device 10 can reduce the expenditure of the reinforcing cost after the soil body disturbance. Meanwhile, the pile-pulling mode of the pile-supporting pile is adopted, so that the danger that the pile is broken easily when the pile is pulled out at the end part can be avoided, meanwhile, the pile-pulling force can be greatly improved, and the application range of the pile-pulling device 10 is widened. In addition, the pile pulling device 10 has simple steps, easy operation and convenient popularization and application.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (6)
1. A method of applying a pile extractor, the pile extractor comprising:
a immersed tube comprising a first end and a second end disposed opposite each other;
the two inclined sliding grooves are symmetrically arranged on the inner wall of the immersed tube and extend from a position close to the second end to a direction far away from the second end;
the bearing rod is positioned in the immersed tube, and two ends of the bearing rod are respectively positioned in the two inclined sliding grooves and slide along the inclined sliding grooves;
the application method of the pile pulling device comprises the following steps:
determining the position of an engineering pile to be pulled out, and sinking the immersed tube;
when the second end of the immersed tube contacts the engineering pile, the bearing rod moves upwards to the top of the inclined chute along the inclined chute under the extrusion of soil body along with the continuous sinking of the immersed tube;
when the bearing rod is sunk to the column bottom elevation position of the engineering pile along with the sinking pipe, the bearing rod moves from the top of the inclined chute to the bottom of the inclined chute along with the upward pulling of the sinking pipe under the action of the gravity of soil and the pile body of the engineering pile;
when the immersed tube continues to be pulled up, the bearing rod supports the bottom of the engineering pile, and then the engineering pile is pulled up.
2. The method of claim 1, further comprising a limiting piece, wherein the limiting piece is sleeved at the end of the bearing rod.
3. The method of claim 1, wherein the cross section of the sinking pipe is circular, and the maximum distance between the two inclined sliding grooves is equal to the inner diameter of the sinking pipe.
4. The method of claim 1, wherein the cross section of the sinking pipe is rectangular, and the distance between two oblique sliding grooves is equal to the length of the side of the rectangle.
5. The method of claim 1, wherein the angle between the line between the bottom and the top of the diagonal chute and the cross section of the immersed tube is 40 ° -50 °.
6. The method of using a pile extractor according to claim 1, wherein the load bearing bar is a steel pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810437148.XA CN108425361B (en) | 2018-05-09 | 2018-05-09 | Pile pulling device and application method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810437148.XA CN108425361B (en) | 2018-05-09 | 2018-05-09 | Pile pulling device and application method thereof |
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| Publication Number | Publication Date |
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| CN108425361A CN108425361A (en) | 2018-08-21 |
| CN108425361B true CN108425361B (en) | 2023-09-22 |
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| CN201810437148.XA Active CN108425361B (en) | 2018-05-09 | 2018-05-09 | Pile pulling device and application method thereof |
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| 套管钻进拔桩法及其工程应用;孙立宝;王云春;;探矿工程(岩土钻掘工程)(第09期);57+65-69 * |
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| 紧邻历史保护建筑的深基坑施工技术;尹晓洁;地基基础;940-942 * |
| 预应力钢筋混凝土管桩拔桩机研制;吴林峰等;工程建设与管理;48-50 * |
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