CN114319360A - Method for chiseling middle part of defected cast-in-place pile - Google Patents
Method for chiseling middle part of defected cast-in-place pile Download PDFInfo
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- CN114319360A CN114319360A CN202111543172.XA CN202111543172A CN114319360A CN 114319360 A CN114319360 A CN 114319360A CN 202111543172 A CN202111543172 A CN 202111543172A CN 114319360 A CN114319360 A CN 114319360A
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Abstract
The invention relates to the technical field of cast-in-place piles, and discloses a method for chiseling the middle part of a defective cast-in-place pile, which comprises the following construction steps: 1) the defective cast-in-place pile is provided with a pile body, a plurality of occlusion holes are drilled in the pile body, and the occlusion holes form an annular groove in the surrounding area of the original reinforcement cage; the annular groove divides the pile body into a pile ring and a pile core; 2) placing a hammer head, pressing the hammer head against the pile ring, forming a hammering gap between the hammer head and the pile core, inserting the lower part of a wedge into the hammering gap, hammering the top of the wedge until the pile core is chiseled off, and forming a pile middle hole in the pile body after the pile core is chiseled off; 3) repeating the construction steps 1) and 2) until the bottom of the middle hole of the pile reaches the defect position of the pile body; the pile body is divided into a pile ring and a pile core by drilling a plurality of engaging holes, the pile ring plays a role in supporting, and the pile core is prevented from damaging the original reinforcement cage in the chiseling process; the bottom of the pile core can be separated by matching the hammer head with the wedge, so that the operation is simple and the construction is convenient.
Description
Technical Field
The invention relates to the technical field of cast-in-place piles, in particular to a method for chiseling the middle of a defective cast-in-place pile.
Background
In the process of pouring and forming the pile in the pile foundation engineering, due to the influences of complicated stratum conditions, improper working procedure operation or abnormal concrete materials and the like, common quality problems of pile body concrete dispersion, pile breakage, excessive pile bottom sediment thickness and the like can occur to a certain degree.
When the cast-in-place pile is detected and judged as a defective cast-in-place pile, the common method is to reinforce by grouting, or to construct again on the original cast-in-place pile, or to adopt methods such as pile re-filling and the like for processing. However, when the defect position of the defective cast-in-place pile is buried deeply or the defect section is large, the grouting reinforcement method is difficult to effectively ensure the treatment quality, and has the problems of long secondary inspection and maintenance time and the like; if reworking is carried out on the original pile position again, construction in the pile forming process is long in time consumption and high in cost due to high concrete strength and large content of reinforcing steel bars, and a large pile machine is difficult to enter the field and is greatly limited by a construction field due to the fact that a pile foundation bearing platform is excavated; and adopt the scheme of mending the stake again, replace former stake with two or many symmetrical stakes, need increase foundation pile cushion cap, the construction progress is slow, pile body maintenance and quality detection cycle are long, and the total treatment cost is high.
In the prior art, the middle part of the pile body of a defective cast-in-place pile is chiseled to form a pile center hole, then concrete is poured into the pile center hole after the defective position is processed, but the operation of excavating and chiseling the middle part of the defective cast-in-place pile is complex, and the construction time is long.
Disclosure of Invention
The invention aims to provide a method for chiseling the middle part of a defective cast-in-place pile, and aims to solve the problems of complex operation and long construction time in the prior art of chiseling the middle part of the defective cast-in-place pile.
The invention discloses a method for chiseling the middle part of a defective cast-in-place pile, which comprises the following construction steps:
1) the defected cast-in-place pile is provided with a concrete cast-in-place pile body, a plurality of engaging holes are drilled in the pile body from top to bottom by utilizing a water mill drill, and the plurality of engaging holes are sequentially engaged and arranged in a surrounding manner to form an annular groove in the surrounding area of the original reinforcement cage; the annular groove divides the pile body into a pile ring and a pile core;
2) placing a hammer head at the bottom of the annular groove, wherein the outer end of the hammer head is abutted against the pile ring, a hammering gap is formed between the inner end of the hammer head and the pile core, the lower part of a wedge is inserted into the hammering gap, the upper part of the wedge extends towards the direction, the wedge is obliquely arranged deviating from the pile core along the direction from bottom to top of the pile core, the bottom of the wedge is obliquely abutted against the periphery of the bottom of the pile core, the top of the wedge is hammered from top to bottom until the pile core is chiseled off, and a pile middle hole is formed in the pile body after the pile core is chiseled off;
3) and repeating the construction step 1) and the construction step 2) until the bottom of the hole in the pile reaches the defect position of the pile body.
Furthermore, the hammer head is provided with a pressing wall facing the pile ring and an inclined wall facing the pile core, the inclined wall is obliquely arranged away from the pile core along the direction from bottom to top of the pile core, the inclined wall penetrates through the top and the bottom of the hammer head, and an embedded edge is formed at the bottom of the inclined wall;
in the construction step 2), the pressing wall of the hammer head presses against the pile ring, the hammering gap is formed between the embedding edge of the hammer head and the pile core, the wedge presses against the inclined wall, and the lower portion of the wedge is arranged in the hammering gap in a penetrating mode and presses against the periphery of the bottom of the pile core.
Furthermore, the inclined wall is provided with a guide groove which penetrates through the top and the bottom of the hammer head; in the construction step 2), the lower part of the wedge is embedded into the guide groove and is obliquely arranged against the bottom of the guide groove, and the lower part of the wedge is arranged in the hammering gap in a penetrating mode and is pressed against the periphery of the bottom of the pile core.
Furthermore, along the direction from bottom to top of the pile core, the guide groove is obliquely arranged away from the pile core.
Further, in construction step 2), through the top of hammering wedge, the periphery of the bottom of striking stake core is extruded to the lower part of wedge, works as after the fracture appears in the periphery of the bottom of stake core, take out the wedge, will the lower part of wedge inserts between the wall of supporting of tup and pile ring, the wedge keeps vertical arrangement, through the top of hammering wedge, along with the wedge inserts the increase of depth between the wall of supporting of tup and pile ring, the tup moves towards the stake core, the embedding limit and the skew wall of tup insert in the fracture of stake core bottom, will the stake core chiseling.
Further, the bottom of tup has the face of placing, the protruding cross axle that is equipped with in middle part of the face of placing, the face of placing is including the lateral surface that is located the cross axle outside and the medial surface that is located the cross axle inboard in construction step 1), work as the tup is placed behind the bottom of ring channel, the cross axle butt is in the bottom of ring channel, work as the embedding limit and the skew wall of tup insert back in the crack of stake core bottom, the lateral surface has the interval with the bottom of ring channel, through the outer end of hammering the tup downwards, the inner of tup uses the cross axle to prize up as the swing center, will the stake core chiseling.
Furthermore, the pile core is provided with a blank facing surface facing the annular groove, in the construction step 1), dividing holes are drilled on the pile core, the dividing holes are sequentially arranged in an occlusion manner to form separating grooves which are arranged in a cross manner, the end parts of the separating grooves penetrate through the blank facing surface of the pile core, and the pile core is divided into four core blocks which are arranged in a surrounding manner.
Furthermore, a vibrating rod is placed in the separation groove and is abutted against the inner side wall of the separation groove; in the construction step 2), the vibrating rod synchronously vibrates in the process of chiseling off the pile core.
Further, in the construction step 2), the vibrating rod vibrates at intervals, and the frequency of the top of the hammering wedge is consistent with the frequency of the interval vibration of the vibrating rod.
Further, in the construction step 2), before the pile core is chiseled by using the wedge, a horizontal groove is ground on the periphery of the bottom of the pile core, and the horizontal groove is embedded in the bottom of the pile core;
in the construction step 2), the lower part of the wedge penetrates through the hammering gap and is embedded and pressed in the horizontal groove.
Compared with the prior art, the method for chiseling the middle part of the defective cast-in-place pile provided by the invention has the advantages that the pile body is divided into the pile ring and the pile core by drilling the plurality of engaging holes, the original reinforcement cage is positioned in the pile ring, the pile ring can play a role in supporting, and the damage to the original reinforcement cage caused by the pile core in the chiseling process is avoided; the bottom of the pile core can be separated by matching the hammer head with the wedge, so that the operation is simple and the construction is convenient.
Drawings
FIG. 1 is a flow chart of a method for chiseling the middle of a defected cast-in-place pile according to the present invention;
FIG. 2 is a schematic top view of the pile body provided with the annular groove provided by the invention;
fig. 3 is a schematic top view of the pile body of the present invention with the pile core removed;
fig. 4 is a schematic perspective view of the present invention for removing the pile core by using the hammer head and the wedge;
fig. 5 is a sectional view of the hammer head provided by the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The following describes the implementation of the present invention in detail with reference to specific embodiments.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms may be understood by those skilled in the art according to specific circumstances.
Referring to fig. 1-5, preferred embodiments of the present invention are shown.
The method for chiseling the middle part of the defective cast-in-place pile comprises the following construction steps:
1) the defected cast-in-place pile is provided with a concrete cast-in-place pile body, a plurality of engaging holes are drilled in the pile body from top to bottom by utilizing a water mill drill, and the plurality of engaging holes are sequentially engaged and arranged in a surrounding manner to form an annular groove 102 in the surrounding area of the original reinforcement cage 104; the annular groove 102 divides the pile body into a pile ring 100 and a pile core 101, and the original reinforcement cage 104 is positioned in the pile ring 100;
2) the bottom of the annular groove 102 is provided with the hammer 300, the outer end of the hammer 300 is pressed against the pile ring 100, a hammering gap is arranged between the inner end of the hammer 300 and the pile core 101, the lower part of the wedge 400 is inserted into the hammering gap, the upper part of the wedge 400 extends towards the direction, the wedge 400 is obliquely arranged away from the pile core 101 along the direction from bottom to top of the pile core 101, the bottom of the wedge 400 is obliquely pressed against the periphery of the bottom of the pile core 101, the top of the wedge 400 is hammered from top to bottom until the pile core 101 is chiseled, and after the pile core 101 is chiseled, the pile body forms the pile middle hole 105.
3) And repeating the construction step 1) and the construction step 2) until the bottom of the hole 105 in the pile reaches the defect position of the pile body.
According to the method for chiseling the middle part of the defective cast-in-place pile, the pile body is divided into the pile ring 100 and the pile core 101 by drilling the plurality of engaging holes, the original reinforcement cage 104 is positioned in the pile ring, the pile ring 100 can play a role in supporting, and the original reinforcement cage 104 is prevented from being damaged by the pile core 101 in the chiseling process; the bottom of the pile core 101 can be separated by matching the hammer head 300 with the wedge 400, so that the operation is simple and the construction is convenient.
In the process of hammering the wedge 400, the periphery of the bottom of the hammering pile core 101 is extruded by utilizing the inclined arrangement of the wedge 400, so that the bottom of the pile core 101 is cracked, and further the effect of separation and chiseling is achieved.
The hammer head 300 has a pressing wall 301 facing the pile ring 100 and an inclined wall 302 facing the pile core 101, the inclined wall 302 is arranged obliquely away from the pile core 101 in the bottom-up direction of the pile core 101, the inclined wall 302 penetrates through the top and the bottom of the hammer head 300, and the bottom of the inclined wall 302 forms an embedding edge 305.
In the construction step 1), the pressing wall 301 of the hammer 300 presses against the pile ring 100, a hammering gap is formed between the embedding edge 305 of the hammer 300 and the pile core 101, the wedge 400 presses against the inclined wall 302, and the lower part of the wedge 400 penetrates through the hammering gap and presses against the periphery of the bottom of the pile core 101.
In this embodiment, the inclined wall 302 is provided with a guide groove 303, and the guide groove 303 penetrates through the top and the bottom of the hammer head 300; in the construction step 2), the lower part of the wedge 400 is embedded in the guide groove 303 and is obliquely arranged against the bottom of the guide groove 303, and the lower part of the wedge 400 is arranged in the hammering gap in a penetrating manner and is pressed against the periphery of the bottom of the pile core 101.
As a more preferred embodiment, the guide groove 303 is arranged obliquely away from the pile core 101 in the bottom-up direction of the pile core 101, facilitating the oblique insertion of the guide wedge 400.
Utilize the guide way 303 can realize the direction location to the hammering downwards of wedge 400, and be favorable to the embedding downwards of wedge 400, realize the separation of stake core 101 bottom, and through setting up the inclined plane, be convenient for be the slope with wedge 400 and arrange, be convenient for the bottom embedding stake core 101 of wedge 400 bottom.
In the construction step 1), the top of the wedge 400 is hammered, the lower part of the wedge 400 is pressed and impacted on the outer periphery of the bottom of the pile core 101, after the outer periphery of the bottom of the pile core 101 is cracked, the wedge 400 is taken out, the lower part of the wedge 400 is inserted between the pressing wall 301 of the hammer head 300 and the pile ring 100, the wedge 400 is kept vertically arranged, and the pile core 101 is chiseled by hammering the top of the wedge 400, as the depth of the wedge 400 inserted between the pressing wall 301 of the hammer head 300 and the pile ring 100 is increased, the hammer head 300 moves downwards towards the pile core 101, the embedding edge 305 and the inclined wall 302 of the hammer head 300 are inserted into the crack at the bottom of the pile core 101.
When the bottom of the piling core 101 is cracked, at this time, the wedge 400 is difficult to be embedded into the bottom of the piling core 101, so that the bottom of the piling core 101 is completely separated, at this time, the pressing wall 301 of the hammer is squeezed, the inclined wall 302 of the hammer is driven to move towards the piling core 101, the embedding edge 305 is firstly embedded into the crack at the bottom of the piling core 101, and then the inclined wall 302 is embedded into the crack, so that the whole piling core 101 is lifted, and the bottom of the piling core 101 is completely separated.
After the pile core 101 is chiseled, the pile core 101 is lifted one by one to form a hole by using a winch and a lifting bucket, an air pick is used for chiseling the working surface and cleaning broken slag in the hole 105 in the pile, so that the positioning plate can be placed when the lower-layer water mill drill is engaged and drilled.
The bottom of the hammer head 300 is provided with a placing surface, the middle part of the placing surface is convexly provided with a transverse shaft 304, the placing surface comprises an outer side surface positioned outside the transverse shaft 304 and an inner side surface positioned inside the transverse shaft 304, in the construction step 1), after the hammer head 300 is placed at the bottom of the annular groove 102, the transverse shaft 304 abuts against the bottom of the annular groove 102, after the embedding edge 305 and the inclined wall 302 of the hammer head 300 are inserted into a crack at the bottom of the pile core 101, the outer side surface is spaced from the bottom of the annular groove 102, and by hammering downwards the outer end of the hammer head 300, the inner end of the hammer head 300 is pried upwards by taking the transverse shaft 304 as a swinging center to chisel the pile core 101.
The transverse shaft 304 is arranged on the placing surface of the hammer head 300, so that the hammer head 300 can move conveniently when being extruded, and after the inclined wall 302 is embedded in a crack at the bottom of the pile core 101, the hammer head 300 is in a tilting state, at the moment, the pile core 101 can be pried by pressing the hammer head 300, and the bottom of the pile core 101 can be thoroughly separated.
The pile core 101 is provided with a blank facing surface facing the annular groove 102, in the construction step 1), a plurality of cutting holes are drilled on the pile core 101 and are sequentially arranged in an occlusion manner to form the separation grooves 103 which are arranged in a cross manner, the end parts of the separation grooves 103 penetrate through the blank facing surface of the pile core 101 to divide the pile core 101 into four core blocks which are arranged in a surrounding manner, and therefore, the subsequent construction is facilitated, and the cutting of the pile core 101 is removed.
In this embodiment, a vibrating rod is placed in the separating groove 103, and the vibrating rod abuts against the inner side wall of the separating groove 103; in the construction step 2), the vibrating rod is vibrated synchronously during the process of chiseling off the pile core 101, so that the wedge 400 is more convenient to chive cracks on the periphery of the bottom of the pile core 101.
In the construction step 2), the vibrating rods vibrate at intervals, and the frequency of the top of the hammering wedge 400 is consistent with the frequency of the interval vibration of the vibrating rods, so that the hammering of the wedge 400 is matched with the vibration frequency of the vibrating rods all the time, and the pile core 101 can be efficiently chiseled.
In this embodiment, in the construction step 2), before the pile core 101 is chiseled off by the wedge 400, a horizontal groove is milled on the outer periphery of the bottom of the pile core 101, and the horizontal groove is embedded in the bottom of the pile core 101; in the construction step 2), the lower portion of the wedge 400 is inserted and pressed against the horizontal groove after passing through the hammering gap. This facilitates the insertion of the lower portion of the wedge 400 and the localized chiseling of the wedge 400 to the outer perimeter of the bottom of the core 101.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The method for chiseling the middle part of the defected cast-in-place pile is characterized by comprising the following construction steps of:
1) the defected cast-in-place pile is provided with a concrete cast-in-place pile body, a plurality of engaging holes are drilled in the pile body from top to bottom by utilizing a water mill drill, and the plurality of engaging holes are sequentially engaged and arranged in a surrounding manner to form an annular groove in the surrounding area of the original reinforcement cage; the annular groove divides the pile body into a pile ring and a pile core;
2) placing a hammer head at the bottom of the annular groove, wherein the outer end of the hammer head is abutted against the pile ring, a hammering gap is formed between the inner end of the hammer head and the pile core, the lower part of a wedge is inserted into the hammering gap, the upper part of the wedge extends towards the direction, the wedge is obliquely arranged deviating from the pile core along the direction from bottom to top of the pile core, the bottom of the wedge is obliquely abutted against the periphery of the bottom of the pile core, the top of the wedge is hammered from top to bottom until the pile core is chiseled off, and a pile middle hole is formed in the pile body after the pile core is chiseled off;
3) and repeating the construction step 1) and the construction step 2) until the bottom of the hole in the pile reaches the defect position of the pile body.
2. The method of chiseling the middle of a defected cast-in-place pile of claim 1, wherein the hammer head has a pressing wall facing the pile ring and an inclined wall facing the pile core, the inclined wall being arranged obliquely away from the pile core in a bottom-up direction of the pile core, the inclined wall penetrating the top and bottom of the hammer head, the bottom of the inclined wall forming an embedding edge;
in the construction step 2), the pressing wall of the hammer head presses against the pile ring, the hammering gap is formed between the embedding edge of the hammer head and the pile core, the wedge presses against the inclined wall, and the lower portion of the wedge is arranged in the hammering gap in a penetrating mode and presses against the periphery of the bottom of the pile core.
3. The method for chiseling the middle part of a defected cast-in-place pile according to claim 2, wherein the inclined wall is provided with a guide groove which penetrates through the top and the bottom of the hammer head; in the construction step 2), the lower part of the wedge is embedded into the guide groove and is obliquely arranged against the bottom of the guide groove, and the lower part of the wedge is arranged in the hammering gap in a penetrating mode and is pressed against the periphery of the bottom of the pile core.
4. A method of chiseling the middle of a defected cast-in-place pile according to claim 3, wherein the guide groove is obliquely arranged away from the pile core in a bottom-up direction of the pile core.
5. The method for chiseling the middle portion of a defected cast-in-place pile according to claim 4, wherein in the step 2) of constructing, by hammering the top of the wedge, the lower portion of the wedge is pressed against the outer circumference of the bottom of the pile core, and when the outer circumference of the bottom of the pile core is cracked, the wedge is removed, the lower portion of the wedge is inserted between the pressing wall of the hammer head and the pile ring, the wedge is maintained in a vertical arrangement, and by hammering the top of the wedge, as the depth of the wedge inserted between the pressing wall of the hammer head and the pile ring increases, the hammer head moves downward toward the pile core, and the embedding edge and the inclined wall of the hammer head are inserted into the crack at the bottom of the pile core, thereby chiseling the pile core.
6. The method for chiseling the middle portion of a defected cast-in-place pile according to any one of claims 1 to 5, wherein the bottom of the hammer head has a placement surface, a lateral shaft is protruded from the middle portion of the placement surface, the placement surface includes an outer side surface located outside the lateral shaft and an inner side surface located inside the lateral shaft, in the step 1) of constructing, after the hammer head is placed at the bottom of the annular groove, the lateral shaft abuts against the bottom of the annular groove, after the embedding side and the inclined wall of the hammer head are inserted into the crack at the bottom of the pile core, the outer side surface is spaced from the bottom of the annular groove, and by hammering the outer end of the hammer head downward, the inner end of the hammer head is pried upward with the lateral shaft as a swing center, thereby chiseling the pile core.
7. The method for chiseling the middle part of a defected cast-in-place pile according to any one of claims 1 to 5, wherein the pile core has a blank facing surface facing an annular groove, in the construction step 1), a plurality of cutting holes are drilled on the pile core and are sequentially arranged in an occlusion manner to form a cross-arranged separation groove, the end part of the separation groove penetrates through the blank facing surface of the pile core, and the pile core is divided into four core blocks which are arranged in a surrounding manner.
8. The method for chiseling the middle part of a defected cast-in-place pile according to claim 7, wherein a vibrating rod is placed in the separation groove and abuts against the inner side wall of the separation groove; in the construction step 2), the vibrating rod synchronously vibrates in the process of chiseling off the pile core.
9. The method for chiseling the middle portion of a defected cast-in-place pile according to claim 8, wherein the vibration rod is vibrated at intervals in the construction step 2), and the frequency of hammering the top portion of the wedge is identical to the frequency of vibration rod interval vibration.
10. The method for chiseling the middle of a defected cast-in-place pile according to any one of claims 1 to 5, wherein in the construction step 2), a horizontal groove is milled in the outer circumference of the bottom of the pile core before chiseling the pile core using a wedge, the horizontal groove being embedded in the bottom of the pile core;
in the construction step 2), the lower part of the wedge penetrates through the hammering gap and is embedded and pressed in the horizontal groove.
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| CN202111543172.XA CN114319360B (en) | 2021-12-16 | 2021-12-16 | Method for chiseling middle part of defect filling pile |
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| CN202111543172.XA CN114319360B (en) | 2021-12-16 | 2021-12-16 | Method for chiseling middle part of defect filling pile |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115198750A (en) * | 2022-06-21 | 2022-10-18 | 中交二公局铁路建设有限公司 | Cast-in-place pile head blocking and cutting device and method |
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| CN113216832A (en) * | 2021-04-09 | 2021-08-06 | 中铁六局集团有限公司 | Water-mill drilling construction method for pile hole in karst area |
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| CN108301401A (en) * | 2018-01-10 | 2018-07-20 | 深圳市工勘岩土集团有限公司 | The construction method of processing bored concrete pile defective section is bored using water mill |
| CN109594918A (en) * | 2019-01-10 | 2019-04-09 | 江西建工第建筑有限责任公司 | Water mill rock drilling layer drilling methods |
| CN112211566A (en) * | 2020-10-30 | 2021-01-12 | 中国建筑第四工程局有限公司 | Manual hole digging pile hole forming method for tunneling large-particle-size moderately weathered nuclei |
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| CN115198750A (en) * | 2022-06-21 | 2022-10-18 | 中交二公局铁路建设有限公司 | Cast-in-place pile head blocking and cutting device and method |
| CN115198750B (en) * | 2022-06-21 | 2023-09-19 | 中交二公局铁路建设有限公司 | Cast-in-place pile head blocking and cutting device and method |
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| CN114319360B (en) | 2023-05-23 |
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