CN114703848B - Old pile pulling-out method - Google Patents
Old pile pulling-out method Download PDFInfo
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- CN114703848B CN114703848B CN202210346063.7A CN202210346063A CN114703848B CN 114703848 B CN114703848 B CN 114703848B CN 202210346063 A CN202210346063 A CN 202210346063A CN 114703848 B CN114703848 B CN 114703848B
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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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- 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
The old pile pulling method includes the steps of after pile positions are determined, excavating and exposing pile heads, and manufacturing a sliding pin type steel cylinder shoe device according to the sizes of the old piles; a sliding pin steel boot device comprising: a pile pulling rod and a sliding pin type boot; the sliding pin type boot is connected to the bottom end side part of the pile pulling rod; lifting a pile pulling rod of a sliding pin type steel cylinder shoe device by using a crawler crane, sleeving the sliding pin type cylinder shoe into an old pile, sliding a pin shaft to the uppermost part under the pushing action of soil, lifting a high-frequency vibrating hammer to vibrate and sink the sliding pin type cylinder shoe to a position 1m below the pile bottom of the old pile by using the crawler crane, and flushing soil at the pile side by using an air compressor and a high-pressure centrifugal water pump in the sinking process; the pin roll 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, lifts the old pile foundation upwards, and smoothly pulls out the old pile. According to the invention, the old pile foundation is lifted through the boot, so that the pile pulling efficiency is high, the construction period is shortened, and the influence on the surrounding environment is small.
Description
Technical Field
The invention belongs to the technical field of rock-soil foundation engineering, and particularly relates to a method for removing old piles.
Background
At present, the urban updating and reconstruction efforts are gradually increased in China, the urban underground space development progress is continuously accelerated, however, waste old pile foundations (such as reinforced concrete cast-in-place piles, CFG piles and precast piles) are always encountered in the updating and reconstruction process, and become a great obstacle in the underground space development process, so that not only are the construction of newly built building pile foundations, shield tunnels, underground pipe networks and the like influenced, but also the construction of foundation pit supports and waterproof curtains are extremely adversely influenced, and therefore, the old piles must be removed before the pile foundations or foundation pit supports are constructed, which is of great importance to the development significance of the urban underground space.
At present, various modes such as hammering and crushing methods are adopted for removing old pile foundations, punching drill bits are adopted for hammering, old piles are crushed to play a role in removing obstacles, the obstacle removing method is simple, but the method still cannot effectively remove reinforcing steel bars existing on pile shafts, 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 that the influence can be reduced to the greatest extent. Along with the rapid development of mechanical equipment and the progress of technology, the technology and machinery of pile pulling construction are continuously updated, and the method and means for pile pulling are also continuously increased.
The old pile foundation is pulled out, the connection between the old pile and the soil body is weakened, the pile side friction resistance of the old pile is reduced, and the phenomenon that the old pile is broken is avoided; meanwhile, the pulling force should overcome the residual pile side friction and the self weight of the old pile. Currently, pile pulling is performed in the following manner, which specifically includes:
hydraulic casing bit pile pulling: according to the method, by arranging the hydraulic drill bit for efficiently pulling out the pile through the sleeve, a plurality of drill teeth are fixed on the lower end face of the drill bit, the inner wall of the drill bit is provided with the locking plate, when the drill bit is sunk, the upper surface of the locking plate is sunk below the lower end face of the old pile, the locking plate is rotated upwards through the hydraulic rod until the old pile can be supported, the old pile is supported by the locking plate along with the upward pulling of the drill bit, the old pile is pulled out through the locking plate, the old pile support bottom is integrally formed with the drill bit and the steel sleeve, and the risk that broken piles are easily generated when the pile is pulled out at the end is avoided. In the sleeve sinking process, the drill continuously sprays high-pressure air and high-pressure water in the sinking process, so that the side friction resistance of the sleeve or old pile body in the sleeve sinking or pile pulling process is greatly reduced, the drill sinking and old pile pulling are facilitated, and the construction efficiency is improved.
Pile pulling of the whole sleeve: the method adopts a vibrating immersed tube to remove a pile body, a sleeve adopts a steel tube, the sleeve is vibrated by a full-rotation device or a vibrating hammer to sink the sleeve to a certain depth below a bored pile, an air compressor or a high-pressure injection device is started to reduce friction between the pile side and soil body in the sleeve sinking process, or the soil body on the pile side is removed by adopting the device, and finally, the old pile is wholly or sectionally lifted out of a sleeve opening by utilizing a steel wire rope or a bottom supporting device.
3. Pile pulling of double-layer sleeve: 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, entering the pile bottom of the waste pile, cutting off the waste pile by a cutter head on the inner pile pulling cylinder, and simultaneously drilling the inner pile pulling cylinder and the waste pile after the inner pile pulling cylinder is separated from the outer protection cylinder, and leaving the outer protection cylinder in soil; and (5) drilling the inner pile pulling cylinder into the soil body again after the waste piles are taken out, and drilling the inner and outer cylinders 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 perform the pulling out of old piles more efficiently, it is necessary to take more efficient, rational and economical pile pulling processes and equipment for the old pile foundations.
Disclosure of Invention
The invention aims to provide a method for removing old piles, which has low manufacturing cost and is easy to remove.
The invention is realized in the following way:
the old pile pulling-out method comprises the following steps:
step one: 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 the old pile;
the sliding pin type steel boot device comprises: a pile pulling rod and a sliding pin type boot; the sliding pin type boot is connected to the bottom end side part of the pile pulling rod;
the sliding pin type boot is provided with two parallel side plates;
the two side plates are symmetrically provided with an oblique slotted hole respectively; a pin shaft is erected between the two chute holes; two ends of the pin shaft are exposed out of the chute holes and are respectively connected with a flange plate;
the front end of the sliding pin type boot is arc-shaped;
the two ends of the inner side of the pile pulling rod are respectively provided with an air inlet hole and a water inlet hole.
The sliding pin type boot is double-layered, and comprises: an inner cylinder boot and an outer cylinder boot;
a gap is formed between the inner barrel boot and the outer barrel boot; the air inlet hole and the water inlet hole are communicated with the gap; the top of the gap between the inner cylinder boot and the outer cylinder boot is sealed by a sealing plate;
step two: the sliding pin type steel cylinder shoe device, the high-frequency vibrating hammer, the crawler crane, the air compressor and the high-pressure centrifugal water pump equipment are assembled in place; the exhaust hole of the air compressor is connected to the air inlet hole of the sliding pin type steel boot device; the water outlet of the high-pressure centrifugal water pump is connected to the water inlet of the sliding pin type steel cylinder boot device;
step three: lifting a pile pulling rod of the sliding pin type steel cylinder shoe device by using a crawler crane, sleeving the sliding pin type cylinder shoe into an old pile, sliding the sliding pin to the uppermost part of the inclined slot hole under the pushing action of soil, lifting a high-frequency vibrating hammer to vibrate and sink the sliding pin type cylinder shoe to a position 1m below the pile bottom of the old pile by using the crawler crane, and flushing soil at the pile side by using an air compressor and a high-pressure centrifugal water pump in the sinking process;
step four: lifting the sliding pin type steel cylinder shoe device by using a crawler crane to lift the high-frequency vibrating hammer in a vibrating way, automatically sliding the sliding pin to the lowest part of the inclined slotted hole to clamp the bottom of the old pile under the action of soil resistance, lifting the old pile foundation to pull up, and smoothly pulling out the old pile;
step five: and after the old pile is pulled out, backfilling the pile hole, and backfilling the pile hole with cement slurry.
Further, the power of the high-frequency vibration hammer is 120KW.
Further, the crawler crane is 120T.
Further, the air displacement of the air compressor is 10m 3 /min。
Further, the pumping pressure of the high-pressure centrifugal water pump is 0.8MPa, and the maximum pressure is 80kg/cm 2 The maximum flow rate is 250L/min.
The invention has the advantages that: the invention utilizes the high-frequency vibration hammer to sink the sliding pin type steel cylinder shoe under the assistance of high-pressure air and high-pressure water, effectively reduces the friction resistance of the old pile body in the pile sinking process, and pulls out the pile after the cylinder shoe is sunk to the pile bottom elevation of the old pile, and the pin shaft automatically slides down to lift the bottom end of the foundation pile in the pulling-out process, so that the old pile is pulled out through the cylinder shoe.
Drawings
The invention will be further described with reference to the accompanying drawings, in conjunction with examples.
FIG. 1 is a front view of a slip pin type steel shoe of the present invention.
FIG. 2 is a top view of a slip pin type steel shoe of the present invention.
Fig. 3 is a schematic view of the construction equipment of the present invention.
Fig. 4 is a schematic view of the structure of the present invention after the devices are assembled in place.
FIG. 5 is a schematic view of the sliding pin steel boot of the present invention reaching the bottom of the pile foundation.
FIG. 6 is a schematic view of the condition of pile foundation being pulled out using the method of the present invention.
Fig. 7 is a schematic view of a pile hole backfill structure after old piles are removed by the method of the invention.
Detailed Description
The old pile pulling-out method comprises the following steps:
step one: after the pile position is determined, excavating and exposing pile heads, and manufacturing a sliding pin type steel shoe device 100 according to the size of the old pile;
as shown in fig. 1 and 2, a sliding pin type steel shoe device 100 includes: a pile pulling rod 1 and a sliding pin type boot 2; the sliding pin type boot 2 is connected to the bottom end side part 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 symmetrically provided with an inclined slot hole 211; a pin 23 is arranged between the two chute holes 211; two ends of the pin shaft 23 are exposed out of the chute holes 211 and are respectively connected with a flange 231;
the front end 22 of the sliding pin type boot 2 is arc-shaped;
the two ends of the inner side of the pile pulling rod 1 are respectively provided with an air inlet hole 3 and a water inlet hole 4;
the sliding pin type boot 2 is double-layered and comprises: an inner cylinder shoe 24 and an outer cylinder shoe 25; a gap 26 is formed between the inner cylinder shoe 24 and the outer cylinder shoe 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 barrel boot 24 and the outer barrel boot 25 is closed by a sealing plate;
step two: as shown in FIG. 3, a slide pin type steel cylinder shoe device 100, 120KW high frequency vibratory hammer 200, 120T crawler crane 300, air compressor 400 (displacement 10 m) 3 /min) and a high-pressure centrifugal water pump 500 (pumping pressure is 0.8MPa, maximum pressure is 80kg/cm < 2 >, maximum flow rate is 250L/min) and the like;
the exhaust hole of the air compressor 400 is connected to the air inlet hole 3 of the sliding pin type steel shoe 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: lifting a pile pulling rod 1 of a sliding pin type steel cylinder shoe device 100 by using a crane 300, sleeving a sliding pin type cylinder shoe 2 into an old pile, sliding a pin shaft 23 to the uppermost part of a chute hole 211 under the action of soil pushing, lifting the sliding pin type cylinder shoe 2 to a position 1m below the pile bottom position of the old pile by using a 120T crawler crane 300 as shown in fig. 4, and flushing soil on the pile side by using an air compressor 400 and a high-pressure centrifugal water pump 500 (water in a water inlet hole 3 and air in an air inlet hole 4 all enter a gap 26 between an inner cylinder shoe 24 and an outer cylinder shoe 25, so that soil on the pile side can be flushed comprehensively), wherein the displacement is 10m < 3 >/min, the pumping pressure is 0.8MPa, the maximum pressure of the high-pressure centrifugal water pump is 80kg/cm < 2 >, and the maximum flow rate is 250L/min, and the pile side resistance is effectively relieved (the concrete vibration hammer power, the air compressor and the high-pressure centrifugal water pump are combined with the actual pile diameter, the old pile length, the condition and other comprehensive factors are determined);
step four: the 120kw high-frequency vibrating hammer 200 is hung by the crawler crane 300 to vibrate and lift the sliding pin type steel cylinder shoe device 100, the pin shaft 23 automatically slides down to the lowest part of the inclined slotted hole 211 to clamp the bottom of the old pile foundation 600 under the action of soil resistance, the old pile foundation 600 is lifted up, as shown in fig. 6, and the old pile foundation 600 is smoothly pulled out;
step five: after the old pile foundation 600 is pulled out, the pile hole is backfilled, and cement slurry 700 is backfilled into the pile hole, as shown in fig. 7.
The invention utilizes the high-frequency vibration hammer 200 to sink the sliding pin type steel cylinder shoe device 100 under the assistance of high-pressure air and high-pressure water, effectively reduces the friction resistance of the pile body of the old pile in the pile sinking process, and pulls out the pile after the sliding pin type cylinder shoe 2 is sunk to the pile bottom elevation of the old pile, and the pin shaft 23 automatically slides down to lift the bottom end of the foundation pile in the pulling-out process, so that the old pile foundation is pulled out through the sliding pin type cylinder shoe 2.
The foregoing is merely illustrative of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The old pile pulling-out method is characterized by comprising the following steps of: the method comprises the following steps:
step one: 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 the old pile;
the sliding pin type steel boot device comprises: a pile pulling rod and a sliding pin type boot; the sliding pin type boot is connected to the bottom end side part of the pile pulling rod;
the sliding pin type boot is provided with two parallel side plates;
the two side plates are symmetrically provided with an oblique slotted hole respectively; a pin shaft is erected between the two chute holes; two ends of the pin shaft are exposed out of the chute holes and are respectively connected with a flange plate;
the front end of the sliding pin type boot is arc-shaped;
the two ends of the inner side of the pile pulling rod are respectively provided with an air inlet hole and a water inlet hole;
the sliding pin type boot is double-layered, and comprises: an inner cylinder boot and an outer cylinder boot;
a gap is formed between the inner barrel boot and the outer barrel boot; the air inlet hole and the water inlet hole are communicated with the gap; the top of the gap between the inner cylinder boot and the outer cylinder boot is sealed by a sealing plate;
step two: the sliding pin type steel cylinder shoe device, the high-frequency vibrating hammer, the crawler crane, the air compressor and the high-pressure centrifugal water pump equipment are assembled in place; the exhaust hole of the air compressor is connected to the air inlet hole of the sliding pin type steel boot device; the water outlet of the high-pressure centrifugal water pump is connected to the water inlet of the sliding pin type steel cylinder boot device;
step three: lifting a pile pulling rod of the sliding pin type steel cylinder shoe device by using a crawler crane, sleeving the sliding pin type cylinder shoe into an old pile, sliding the sliding pin to the uppermost part of the inclined slot hole under the pushing action of soil, lifting a high-frequency vibrating hammer to vibrate and sink the sliding pin type cylinder shoe to a position 1m below the pile bottom of the old pile by using the crawler crane, and flushing soil at the pile side by using an air compressor and a high-pressure centrifugal water pump in the sinking process;
step four: lifting the sliding pin type steel cylinder shoe device by using a crawler crane to lift the high-frequency vibrating hammer in a vibrating way, automatically sliding the sliding pin to the lowest part of the inclined slotted hole to clamp the bottom of the old pile under the action of soil resistance, lifting the old pile foundation to pull up, and smoothly pulling out the old pile;
step five: and after the old pile is pulled out, backfilling the pile hole, and backfilling the pile hole with cement slurry.
2. A method of old pile extraction as defined in claim 1, wherein: the power of the high-frequency vibrating hammer is 120KW.
3. A method of old pile extraction as defined in claim 1, wherein: the crawler crane is 120T.
4. A method of old pile extraction as defined in claim 1, wherein: the air displacement of the air compressor is 10m 3 /min。
5. A method of old pile extraction as defined in claim 1, wherein: the pumping pressure of the high-pressure centrifugal water pump is 0.8MPa, and the maximum pressure is 80kg/cm 2 The 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 |
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| 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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| CN114703848A CN114703848A (en) | 2022-07-05 |
| CN114703848B true CN114703848B (en) | 2023-05-30 |
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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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| CN114703848A (en) | 2022-07-05 |
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