CN114703848A - Old pile pulling method - Google Patents
Old pile pulling method Download PDFInfo
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- CN114703848A CN114703848A CN202210346063.7A CN202210346063A CN114703848A CN 114703848 A CN114703848 A CN 114703848A CN 202210346063 A CN202210346063 A CN 202210346063A CN 114703848 A CN114703848 A CN 114703848A
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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
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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
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
A method for removing an old pile comprises the steps of excavating and exposing a pile head after a pile position is determined, and manufacturing a sliding pin type steel cylinder shoe device according to the size of the old pile; sliding pin formula shaped steel section of thick bamboo boots device includes: a pile pulling rod and a sliding pin type barrel shoe; the sliding pin type barrel shoe is connected to the side part of the bottom end of the pile pulling rod; hoisting a pile pulling rod of the sliding pin type old pile pulling device by using a crawler crane, sleeving a sliding pin type barrel shoe into an old pile, sliding a pin shaft to the uppermost part under the pushing action of a soil body, hoisting a high-frequency vibration hammer to vibrate and sink the sliding pin type barrel shoe to a position 1m below the pile bottom of the old pile by using the crawler crane, and washing soil on the pile side by using an air compressor and a high-pressure centrifugal water pump in the sinking process; the pin shaft automatically slides to the lowest part of the inclined groove hole to clamp the bottom of the old pile under the action of soil resistance, lifts the old pile foundation to be pulled upwards, and smoothly pulls out the old pile. The invention pulls out the old pile foundation through the barrel shoe, has high pile pulling efficiency, is beneficial to shortening the construction period and has little influence on the surrounding environment.
Description
Technical Field
The invention belongs to the technical field of geotechnical foundation engineering, and particularly relates to an old pile pulling method.
Background
At present, the city renovation and transformation force is gradually increased in China, the city underground space development progress is continuously accelerated, however, abandoned old pile foundations (such as reinforced concrete cast-in-place piles, CFG piles, precast piles and the like) are frequently encountered in the renovation and transformation process, the old pile foundations become a big obstacle in the underground space development process, the construction of newly-built pile foundations, shield tunnels, underground pipe networks and the like is influenced, the extremely adverse effect is generated on the construction of foundation pit supports and waterproof curtains, and therefore the old piles must be removed before the construction of the pile foundations or the foundation pit supports, and the development significance of the city underground space is very important.
At present, the old pile foundation is removed in multiple modes, for example, a hammering crushing method, a punching drill bit is adopted for hammering, the old pile is chiseled to play a role in removing obstacles, the obstacle removing method is simple, but the method still cannot effectively remove the steel bars existing in the pile body, only the influence on underground space construction is reduced to a certain extent, and the construction period is long. Therefore, the most effective method is to pull out the whole old pile foundation, so as to reduce the influence to the maximum extent. With the rapid development of mechanical equipment and the advancement of science and technology, the technology and machinery for pile pulling construction are continuously updated, and methods and means for pile pulling are continuously increased.
The removal of the old pile foundation needs to weaken the connection between the old pile and the soil body, reduce the side frictional resistance of the old pile and avoid the breakage of the old pile; meanwhile, the pulling force should overcome the residual pile side friction and self weight of the old pile. Currently, there is the following mode to carry out the pile pulling, specifically include:
1. hydraulic casing bit pile pulling: according to the method, a hydraulic drill bit with high efficiency for sleeve pile pulling is arranged, a plurality of drill teeth are fixed on the lower end face of the drill bit, a cut-off plate is arranged on the inner wall of the drill bit, when the drill bit sinks, the upper surface of the cut-off plate sinks below the lower end face of an old pile, the cut-off plate is rotated upwards through a hydraulic rod until the old pile can be supported, the cut-off plate supports the old pile along with the upward pulling of the drill bit, the cut-off plate integrally pulls out the old pile support bottom, the drill bit and a steel sleeve are formed, and the risk that pile breaking is easily caused by end pile pulling is avoided. In the casing pipe sinking process, the drill bit continuously injects high-pressure air and high-pressure water in the sinking process, so that the side friction resistance of the casing pipe or an old pile body in the casing pipe sinking or pile pulling process is greatly reduced, the drill bit is convenient to sink and the old pile is convenient to pull out, and the construction efficiency is improved.
2. Pile pulling of a whole sleeve: the method adopts a vibration sinking pipe to pull out a pile body, a sleeve pipe adopts a steel pipe, the sleeve pipe is vibrated and sunk to a certain depth below a bored pile by full-rotation equipment or a vibration hammer, an air compressor or high-pressure injection equipment is started to reduce the frictional resistance between the pile side and a soil body in the sinking process of the sleeve pipe, or the equipment is adopted to remove the soil body on the pile side, and finally, a steel wire rope or bottom supporting equipment is used for hoisting the old pile out of a sleeve opening in a whole or in sections.
3. Pile pulling with double-layer sleeves: driving the inner cylinder and the outer cylinder to drill into the ground through the downward pressure and the torque generated by a power head connected with the inner pile pulling cylinder, enabling the inner cylinder and the outer cylinder to enter the bottom of the waste pile, cutting off the waste pile by using a tool bit on the inner pile pulling cylinder, separating the inner pile pulling cylinder from the outer protection cylinder, drilling out the inner pile pulling cylinder and the waste pile simultaneously, and keeping the outer protection cylinder in the soil; and (4) drilling the inner pile pulling barrel into the soil body again after the waste pile is taken out, and drilling the inner barrel and the outer barrel while backfilling.
The pile pulling technology or construction equipment is expensive, and the construction cost is high; or the pile pulling principle is simple, the construction speed is high, but the construction cost is relatively high; or the construction equipment requirement is low, the investment is less, but the pile pulling success rate is low. In order to more effectively remove the old pile, it is necessary to adopt more effective, reasonable and economic pile-removing processes and equipment for the old pile foundation.
Disclosure of Invention
The invention aims to solve the technical problem of providing an old pile pulling method which is low in manufacturing cost and easy to pull.
The invention is realized by the following steps:
an old pile pulling method comprises the following steps:
the method comprises the following steps: after the pile position is determined, excavating and exposing a pile head, and manufacturing a sliding pin type steel cylinder shoe device according to the size of an old pile;
the sliding pin type steel barrel shoe device comprises: a pile pulling rod and a sliding pin type boot; the sliding pin type barrel shoe is connected to the side part of the bottom end of the pile pulling rod;
the sliding pin type boot is provided with two parallel side plates;
the two side plates are respectively and symmetrically provided with an inclined slotted hole; a pin shaft is arranged between the two inclined slotted holes; two end parts of the pin shaft are exposed out of the inclined slotted hole and are respectively connected with a flange plate;
the front end of the sliding pin type boot is arc-shaped;
an air inlet hole and a water inlet hole are respectively formed in the two ends of the inner side of the pile pulling rod.
The sliding pin boot is double-layered and comprises: inner and outer boots;
a gap is formed between the inner boot and the outer boot; the air inlet hole and the water inlet hole are communicated with the gap; the top of the gap between the inner boot and the outer boot is sealed by a sealing plate;
step two: assembling a sliding pin type steel cylinder shoe device, a high-frequency vibration hammer, a crawler crane, an air compressor and high-pressure centrifugal water pump equipment in place; the exhaust hole of the air compressor is connected to the air inlet hole of the sliding pin type steel cylinder shoe device; the water outlet of the high-pressure centrifugal water pump is connected to the water inlet of the sliding pin type steel cylinder shoe device;
step three: hoisting a pile pulling rod of the sliding pin type old pile pulling device by using a crawler crane, sleeving the sliding pin type barrel shoe into the old pile, sliding the sliding pin to the uppermost part of the inclined slotted hole under the pushing action of a soil body, hoisting a high-frequency vibration hammer by using the crawler crane to vibrate and sink the sliding pin type barrel shoe to a position 1m below the pile bottom of the old pile, and washing soil on the pile side by using an air compressor and a high-pressure centrifugal water pump in the sinking process;
step four: a crawler crane is used for hanging a high-frequency vibration hammer to vibrate and lift the sliding pin type old pile pulling device, the sliding pin automatically slides to the lowest part of the inclined slotted hole to clamp the bottom of the old pile under the action of soil resistance, the old pile foundation is lifted to be pulled upwards, and the old pile is pulled out smoothly;
step five: and after the old pile is pulled out, backfilling the pile hole, and backfilling the pile hole with cement paste.
Further, the power of the high-frequency vibration hammer is 120 KW.
Further, the crawler crane is 120T.
Further, the displacement of the air compressor is 10m3/min。
Further, the pumping pressure of the high-pressure centrifugal water pump is 0.8MPa, and the maximum pressure is 80kg/cm2The maximum flow rate is 250L/min.
The invention has the advantages that: the invention uses the high-frequency vibration hammer to sink the sliding pin type steel barrel shoe under the assistance of high-pressure air and high-pressure water, effectively reduces the frictional resistance of the old pile body in the pile sinking process, carries out pile pulling after the barrel shoe sinks to the pile bottom elevation of the old pile, automatically slides the pin shaft down to lift the bottom end of the foundation pile in the pile pulling process, and pulls out the old pile through the barrel shoe.
Drawings
The invention will be further described with reference to the following examples with reference to the accompanying drawings.
FIG. 1 is a front view of a sliding pin type steel boot of the present invention.
FIG. 2 is a plan view of the sliding pin type steel boot of the present invention.
Fig. 3 is a schematic view of the construction equipment of the present invention.
Figure 4 is a schematic diagram of the apparatus of the present invention assembled in place.
Fig. 5 is a schematic view of the sliding pin type steel barrel shoe of the present invention reaching the bottom of the pile foundation.
Fig. 6 is a schematic view of the pile foundation being pulled out using the method of the present invention.
Fig. 7 is a schematic diagram of a pile hole backfill structure after an old pile is pulled out by the method.
Detailed Description
An old pile pulling method comprises the following steps:
the method comprises the following steps: after the pile position is determined, excavating and exposing a pile head, and manufacturing a sliding pin type steel cylinder shoe device 100 according to the size of an old pile;
as shown in fig. 1 and 2, the sliding pin type steel boot device 100 includes: a pile pulling rod 1 and a sliding pin type barrel shoe 2; the sliding pin type barrel shoe 2 is connected to the side part of the bottom end of the pile pulling rod 1; the pile pulling rod 1 is H-shaped steel;
the sliding pin type boot 2 is provided with two parallel side plates 21;
the two side plates 21 are respectively and symmetrically provided with an inclined slot hole 211; a pin shaft 23 is erected between the two inclined slot holes 211; two end parts of the pin shaft 23 are exposed out of the inclined slot holes 211 and are respectively connected with a flange plate 231;
the front end 22 of the sliding pin type boot 2 is arc-shaped;
an air inlet 3 and a water inlet 4 are respectively arranged at the two ends of the inner side of the pile pulling rod 1;
the sliding pin type boot 2 is double-layer and comprises: inner and outer boots 24 and 25; a gap 26 is formed between the inner boot 24 and the outer boot 25; the air inlet hole 3 and the water inlet hole 4 are communicated with the gap 26; the top of the gap between the inner boot 24 and the outer boot 25 is closed by a closing plate;
step two: as shown in FIG. 3, a sliding pin type steel cylinder shoe apparatus 100, a 120KW high-frequency vibration hammer 200, a 120T crawler crane 300, and an air compressor 400 (with an air displacement of 10 m)3Min) and a high-pressure centrifugal water pump 500 (the pumping pressure is 0.8MPa, the maximum pressure is 80kg/cm2, the maximum flow rate is 250L/min) and the like;
the exhaust hole of the air compressor 400 is connected to the intake hole 3 of the sliding pin type steel boot device 100; the water outlet of the high-pressure centrifugal water pump 500 is connected to the water inlet 4 of the sliding pin type steel boot device 100;
step three: the pile pulling rod 1 of the sliding pin type old pile pulling device 100 is lifted by a crane 300, the sliding pin type barrel shoe 2 is sleeved into the old pile, the pin shaft 23 slides to the uppermost part of the inclined groove hole 211 under the pushing action of soil mass, as shown in figure 4, a 120kW high-frequency vibration hammer 200 is hung by a 120T crawler crane 300 to vibrate the sinking sliding pin type barrel shoe 2 to the position 1m below the pile bottom position of the old pile (as shown in figure 5), during the sinking process, an air compressor 400 and a high-pressure centrifugal water pump 500 are adopted to carry out pile side soil washing (all water in a water inlet hole 3 and air in an air inlet hole 4 enter a gap 26 between an inner barrel shoe 24 and an outer barrel shoe 25 so as to comprehensively wash the pile side soil), the air displacement is 10m3/min, the pumping pressure is 0.8MPa, the maximum pressure of the high-pressure centrifugal water pump is 80kg/cm2, the maximum flow is 250L/min, and the friction resistance (specific power of the vibration hammer side) is effectively removed, The air compressor and the high-pressure centrifugal water pump are comprehensively determined by combining factors such as the actual pile diameter, the pile length and the geological conditions of the old pile;
step four: the 120kw high-frequency vibration hammer 200 is hung by a crawler crane 300 to vibrate and lift the sliding pin type old pile removing device 100, the pin shaft 23 automatically slides to the lowest part of the inclined slot hole 211 under the action of soil resistance to clamp the bottom of the old pile foundation 600, the old pile foundation 600 is lifted and pulled upwards, as shown in fig. 6, and the old pile foundation 600 is pulled out smoothly;
step five: after the old pile foundation 600 is pulled out, the pile hole is backfilled, and cement slurry 700 is used for backfilling the pile hole, as shown in fig. 7.
The invention utilizes the high-frequency vibration hammer 200 to sink the sliding pin type old pile removing device 100 under the assistance of high-pressure air and high-pressure water, effectively reduces the frictional resistance of the pile body of the old pile in the pile sinking process, and carries out pile removing after the sliding pin type barrel shoe 2 sinks to the pile bottom elevation of the old pile, the pin shaft 23 automatically slides down to lift the bottom end of the foundation pile in the pulling process, and the old pile is pulled out through the sliding pin type barrel shoe 2.
The above description is only an example of the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A method for removing an old pile is characterized by comprising the following steps: the method comprises the following steps:
the method comprises the following steps: after the pile position is determined, excavating and exposing a pile head, and manufacturing a sliding pin type steel cylinder shoe device according to the size of an old pile;
the sliding pin type steel barrel shoe device comprises: a pile pulling rod and a sliding pin type barrel shoe; the sliding pin type barrel shoe is connected to the side part of the bottom end of the pile pulling rod;
the sliding pin type boot is provided with two parallel side plates;
the two side plates are respectively and symmetrically provided with an inclined slotted hole; a pin shaft is arranged between the two inclined slotted holes; two end parts of the pin shaft are exposed out of the inclined slotted hole and are respectively connected with a flange plate;
the front end of the sliding pin type boot is arc-shaped;
an air inlet hole and a water inlet hole are respectively formed in two ends of the inner side of the pile pulling rod.
The sliding pin boot is double-layered and comprises: inner and outer boots;
a gap is formed between the inner boot and the outer boot; the air inlet hole and the water inlet hole are communicated with the gap; the top of the gap between the inner boot and the outer boot is sealed by a sealing plate;
step two: assembling a sliding pin type steel cylinder shoe device, a high-frequency vibration hammer, a crawler crane, an air compressor and high-pressure centrifugal water pump equipment in place; the exhaust hole of the air compressor is connected to the air inlet hole of the sliding pin type steel cylinder shoe device; a water outlet hole of the high-pressure centrifugal water pump is connected to a water inlet hole of the sliding pin type steel boot device;
step three: hoisting a pile pulling rod of the sliding pin type old pile pulling device by using a crawler crane, sleeving the sliding pin type barrel shoe into the old pile, sliding the sliding pin to the uppermost part of the inclined slotted hole under the pushing action of a soil body, hoisting a high-frequency vibration hammer by using the crawler crane to vibrate and sink the sliding pin type barrel shoe to a position 1m below the pile bottom of the old pile, and washing soil on the pile side by using an air compressor and a high-pressure centrifugal water pump in the sinking process;
step four: a crawler crane is used for hanging a high-frequency vibration hammer to vibrate and lift the sliding pin type old pile pulling device, the sliding pin automatically slides to the lowest part of the inclined slotted hole to clamp the bottom of the old pile under the action of soil resistance, the old pile foundation is lifted to be pulled upwards, and the old pile is pulled out smoothly;
step five: and after the old pile is pulled out, backfilling the pile hole, and backfilling the pile hole with cement paste.
2. A method of removing an old pile as claimed in claim 1, wherein: the power of the high-frequency vibration hammer is 120 KW.
3. A method of removing an old pile as claimed in claim 1, wherein: the crawler crane is 120T.
4. A method of removing an old pile as claimed in claim 1, wherein: the displacement of the air compressor is 10m3/min。
5. The method for removing the old pile as claimed in claim 1, wherein: the pumping pressure of the high-pressure centrifugal water pump is 0.8MPa, and the maximum pressure is 80kg/cm2The maximum flow rate is 250L/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210346063.7A CN114703848B (en) | 2022-04-02 | 2022-04-02 | Old pile pulling-out method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210346063.7A CN114703848B (en) | 2022-04-02 | 2022-04-02 | Old pile pulling-out method |
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| Publication Number | Publication Date |
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| CN114703848A true CN114703848A (en) | 2022-07-05 |
| CN114703848B CN114703848B (en) | 2023-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210346063.7A Active CN114703848B (en) | 2022-04-02 | 2022-04-02 | Old pile pulling-out method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001164572A (en) * | 1999-12-13 | 2001-06-19 | Yoshikazu Harada | Pile pulling equipment |
| CN104652436A (en) * | 2014-12-24 | 2015-05-27 | 福建工程学院 | Steel sleeve soil taking and high-pressure water injection soil loosening pile pulling construction method |
| CN106149713A (en) * | 2016-07-05 | 2016-11-23 | 武汉船用机械有限责任公司 | A kind of shoe |
| JP2018111984A (en) * | 2017-01-11 | 2018-07-19 | 植田基工株式会社 | Pile extraction device |
| CN108560551A (en) * | 2018-04-16 | 2018-09-21 | 五冶集团上海有限公司 | A kind of pile pulling sleeve and its application method |
| CN111005381A (en) * | 2019-12-24 | 2020-04-14 | 浙江鸿晨建设有限公司 | Bottom-pocket type vibration hammer profile steel pile extractor and pile extracting method thereof |
-
2022
- 2022-04-02 CN CN202210346063.7A patent/CN114703848B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001164572A (en) * | 1999-12-13 | 2001-06-19 | Yoshikazu Harada | Pile pulling equipment |
| CN104652436A (en) * | 2014-12-24 | 2015-05-27 | 福建工程学院 | Steel sleeve soil taking and high-pressure water injection soil loosening pile pulling construction method |
| CN106149713A (en) * | 2016-07-05 | 2016-11-23 | 武汉船用机械有限责任公司 | A kind of shoe |
| JP2018111984A (en) * | 2017-01-11 | 2018-07-19 | 植田基工株式会社 | Pile extraction device |
| CN108560551A (en) * | 2018-04-16 | 2018-09-21 | 五冶集团上海有限公司 | A kind of pile pulling sleeve and its application method |
| CN111005381A (en) * | 2019-12-24 | 2020-04-14 | 浙江鸿晨建设有限公司 | Bottom-pocket type vibration hammer profile steel pile extractor and pile extracting method thereof |
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| Publication number | Publication date |
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| CN114703848B (en) | 2023-05-30 |
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