CN111236230A - Construction method of pre-arranged type fracture concrete pile head - Google Patents
Construction method of pre-arranged type fracture concrete pile head Download PDFInfo
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- CN111236230A CN111236230A CN202010052258.1A CN202010052258A CN111236230A CN 111236230 A CN111236230 A CN 111236230A CN 202010052258 A CN202010052258 A CN 202010052258A CN 111236230 A CN111236230 A CN 111236230A
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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
- E02D9/005—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof removing the top of placed piles of sheet piles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
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Abstract
The invention relates to the field of civil engineering pile foundation construction, and discloses a construction method of a pre-arranged type fracture concrete pile head, which comprises the following steps of A, fixing a jack group on the upper side of a reinforcement cage (1) on a pre-section (2), arranging jacks (3) in the reinforcement cage (1), installing the reinforcement cage (1), and pouring concrete; B. after the concrete is solidified, pressurizing the jack group to pre-fracture the concrete at the position of the pre-fracture surface (2); C. after the foundation pit is excavated, continuing pressurizing the jack group, jacking the concrete on the upper side of the pre-fracture surface (2), and integrally hoisting the concrete on the upper side of the pre-fracture surface (2) by using a crane; D. and recovering the jack group for next use after finishing. The jack group generates upward jacking force on the concrete with the fractured pre-fracture surface, so that the concrete on the upper side of the fractured pre-fracture surface can be conveniently lifted off; the construction difficulty of prying the concrete on the upper side of the pre-fracture surface is simplified, the construction period of the project is ensured, and the potential safety hazard of the occupational health of workers is eliminated.
Description
Technical Field
The invention relates to the field of civil engineering pile foundation construction, in particular to a construction method of a pre-positioned type broken concrete pile head.
Background
In the existing construction of the cast-in-situ bored pile, the common method is as follows: chiseling with a small machine or cutting the pile head concrete at the designed elevation position by a cutting machine, chiseling the protective layer concrete of the super-sealed pile head manually, stripping the main reinforcement from the lateral direction, and cleaning the pile head concrete in blocks. The traditional construction method has the following defects: (1) the construction efficiency is low. The man-made construction breaks the poor working environment of the concrete pile head for 1-1.5 days (2). The stripping of the main reinforcement protective layer takes longer time, more construction dust and large noise. (3) The recovery of the waste concrete is difficult. After cutting, the large concrete is difficult to transport out of the foundation pit. (4) The construction quality is greatly influenced. When the main bar protective layer is peeled off, the reinforcing bar is damaged, and bending deformation of the reinforcing bar is caused, so that the tensile strength is reduced, and the joint position becomes a weak point. (5) The construction cost is high. The pile head construction period is long, and the costs of precipitation, water resistance, labor and machinery are high. (6) The construction potential safety hazard is many. In the construction process, electric shock, falling, crushing, collapse and other potential safety hazards exist.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a construction method of a pre-arranged type broken concrete pile head.
In order to solve the technical problem, the invention is solved by the following technical scheme:
a construction method of a pre-arranged type fracture concrete pile head comprises the following steps,
A. the steel bars on the upper side of the pre-section of the steel bar cage are sleeved with a first wrapping layer; and fixing the jack group on the steel bars on the upper side of the pre-fracture surface, wherein the jack group comprises at least two jacks, the jacks are all arranged in a steel bar cage, the outer side of each jack is sleeved with a second wrapping layer, the steel bar cage is installed, and the concrete is poured. The sounding pipe and the hanging ribs are bound on the reinforcing steel bars, and the sounding pipe and the hanging ribs are both sleeved with the first wrapping layer. The steel bars in the steel bar cage are detection tubes.
B. After the concrete is solidified, pressurizing the jack group to break the concrete on the surface where the pre-section is located; pressurizing the jack set 1-2 days after the concrete is solidified (the strength is greater than 10 MPa), so that the concrete on the surface where the pre-section is located is broken.
C. After the foundation pit is excavated, continuously pressurizing the jack group, jacking the concrete on the upper side of the pre-fracture surface, and hoisting the concrete on the upper side of the pre-fracture surface away by using a crane;
D. recovering the jack group, and finishing for the next use; and recovering the first sleeve sleeved at the upper end of the reinforcement cage.
Preferably, the jack is a solid jack or a hollow jack, the reinforcement cage comprises at least three main reinforcement bars, and the solid jack or the hollow jack is arranged between the adjacent main reinforcement bars.
Preferably, the jack is arranged on the inner side or the outer side of the reinforcement cage, and the jack is a solid jack or a hollow jack.
Preferably, the jack is a hollow jack, the reinforcement cage comprises at least three main reinforcement bars, and the hollow jack is sleeved on the main reinforcement bars.
Preferably, a first wrapping layer is arranged between the hollow jack and the main reinforcing steel bars.
Preferably, the material of the first and second wrapping layers is a release medium. The first wrapping layer and the second wrapping layer are made of wrapping isolation media such as pearl wool, polyurethane or paper pulp.
Preferably, the pre-section is further provided with a cavity ring. The connecting pipe and the fixed plate of the jack group are arranged at the inner side of the cavity ring. The cavity ring reduces the cross section of the concrete, and the fracture of the pre-fracture surface is facilitated. The fixing plate is made of recyclable materials such as a rubber plate or a wood plate.
Preferably, the pre-section is also provided with a medium surface, and the medium surface is arranged at the lower end of the jack group.
Preferably, the jacks are connected in series or in parallel.
Preferably, the jack group further comprises oil pipes, and the jacks are connected in series through the oil pipes.
The jack group can automatically lift and separate from concrete, and stable recycling is realized.
The pre-arranged type breaking device for breaking the concrete pile head can be used for conveniently and automatically breaking and separating the concrete at the designed position of the pile top, so that the subsequent pile head concrete separation work efficiency is improved, the engineering construction cost is saved, the environmental pollution is reduced, the occupational health safety of workers is ensured, the engineering safety risk is reduced, and the engineering quality is improved. Due to the adoption of the technical scheme, the invention has obvious technical effect and social effect: the jack sets (hollow jacks or solid jacks) which are all arranged in the reinforcement cage are started, pressure is firstly generated on the concrete (namely, the pre-section) around the jack sets, and the pre-section concrete is broken. Starting again, the hollow jack or the solid jack generates upward pressure on the concrete with the fractured pre-fracture surface, so that the concrete on the upper side of the fractured pre-fracture surface can be conveniently lifted off; the construction difficulty of prying the concrete on the upper side of the pre-fracture surface by workers is simplified, the construction time is saved, the environmental pollution is reduced, and the occupational health and safety of the workers are guaranteed.
The interlayer is arranged on the outer side of the reinforcement cage, so that the reinforcement cage and the concrete are separated by the interlayer, and the gripping force cannot be formed; when the concrete on the upper side of the pre-fault is recycled, the concrete is easy to separate from the reinforcement cage. The outer side of the hollow jack or the solid jack is provided with a sleeve which is convenient to recover. The device has compact structure and convenient operation.
The cavity ring or the medium surface is used for protecting the jack group, so that the jack group can be conveniently recovered from concrete; has the advantages of low cost, recovery time saving and the like.
Drawings
FIG. 1 is a schematic structural view of example 1.
FIG. 2 is a schematic structural view of example 2.
FIG. 3 is a schematic structural view of embodiment 3.
FIG. 4 is a schematic structural view of example 4.
FIG. 5 is a schematic structural view of example 5.
Fig. 6 is a schematic structural diagram of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. As shown, 6 is a foundation or casing.
Example 1
A construction method of a pre-arranged type fracture concrete pile head, as shown in figures 1 and 6, comprising the following steps,
A. sleeving a first wrapping layer 11 on the upper side of the pre-section of the reinforcement cage 1, fixing a jack group on the reinforcement cage 1 on the upper side of the pre-section 2, wherein the jack group comprises at least two jacks 3, the jacks 3 are all arranged in the reinforcement cage 1, sleeving a second wrapping layer 31 on the outer sides of the jacks 3 (the first wrapping layer 11 and the second wrapping layer 31 are made of wrapping isolation media such as pearl wool, polyurethane or paper pulp), installing the reinforcement cage 1, and pouring concrete;
B. after the concrete is solidified, pressurizing the jack group to break the concrete of the layer where the pre-section 2 is located;
C. continuing to pressurize the jack group, jacking the concrete on the upper side of the pre-fracture surface 2, and lifting away the concrete on the upper side of the pre-fracture surface 2;
D. and (5) recovering the jack group, and dismantling the first sleeve 11 sleeved at the upper end of the reinforcement cage 1.
The jack 3 is a solid jack or a hollow jack, the reinforcement cage 1 comprises at least three main reinforcement bars 12, and the solid jack or the hollow jack is arranged between the adjacent main reinforcement bars 12. The jack group also comprises an oil pipe 5, and the jacks 3 are connected in series through the oil pipe 5.
Example 2
A construction method of a pre-positioned type broken concrete pile head, as shown in figures 2 and 6, comprising the following steps,
A. sleeving a first wrapping layer 11 on the upper side of the pre-section of the reinforcement cage 1, fixing a jack group on the reinforcement cage 1 on the upper side of the pre-section 2, wherein the jack group comprises at least two jacks 3, the jacks 3 are all arranged in the reinforcement cage 1, sleeving a second wrapping layer 31 on the outer sides of the jacks 3 (the materials of the first wrapping layer 11 and the second wrapping layer 31 are pearl cotton or polyurethane or paper pulp), installing the reinforcement cage 1, and pouring concrete;
B. after the concrete is solidified, pressurizing the jack group to break the concrete of the layer where the pre-section 2 is located;
C. continuing to pressurize the jack group, jacking the concrete on the upper side of the pre-fracture surface 2, and lifting away the concrete on the upper side of the pre-fracture surface 2;
D. and (5) recovering the jack group, and dismantling the first sleeve 11 sleeved at the upper end of the reinforcement cage 1.
The jack 3 is a solid jack or a hollow jack, and the solid jack or the hollow jack is arranged on the inner side of the reinforcement cage 1. The jack group also comprises an oil pipe 5, and the jacks 3 are connected in series through the oil pipe 5.
Example 3
A construction method of a pre-positioned type broken concrete pile head, as shown in figures 3 and 6, comprising the following steps,
A. sleeving a first wrapping layer 11 on the upper side of the pre-section of the reinforcement cage 1, fixing a jack group on the reinforcement cage 1 on the upper side of the pre-section 2, wherein the jack group comprises at least two jacks 3, the jacks 3 are all arranged in the reinforcement cage 1, sleeving a second wrapping layer 31 on the outer sides of the jacks 3 (the materials of the first wrapping layer 11 and the second wrapping layer 31 are pearl cotton or polyurethane or paper pulp), installing the reinforcement cage 1, and pouring concrete;
B. after the concrete is solidified, pressurizing the jack group to break the concrete of the layer where the pre-section 2 is located;
C. continuing to pressurize the jack group, jacking the concrete on the upper side of the pre-fracture surface 2, and lifting away the concrete on the upper side of the pre-fracture surface 2;
D. and (5) recovering the jack group, and dismantling the first sleeve 11 sleeved at the upper end of the reinforcement cage 1.
The jack 3 is a solid jack or a hollow jack, and the solid jack or the hollow jack is arranged on the outer side of the reinforcement cage 1. The jack group also comprises an oil pipe 5, and the jacks 3 are connected in series through the oil pipe 5.
Example 4
A construction method of a pre-positioned type broken concrete pile head, as shown in fig. 4 and 6, comprising the following steps,
A. sleeving a first wrapping layer 11 on the upper side of the pre-section of the reinforcement cage 1, fixing a jack group on the reinforcement cage 1 on the upper side of the pre-section 2, wherein the jack group comprises at least two jacks 3, the jacks 3 are all arranged in the reinforcement cage 1, sleeving a second wrapping layer 31 on the outer sides of the jacks 3 (the materials of the first wrapping layer 11 and the second wrapping layer 31 are pearl cotton or polyurethane or paper pulp), installing the reinforcement cage 1, and pouring concrete;
B. after the concrete is solidified, pressurizing the jack group to break the concrete of the layer where the pre-section 2 is located;
C. continuing to pressurize the jack group, jacking the concrete on the upper side of the pre-fracture surface 2, and lifting away the concrete on the upper side of the pre-fracture surface 2;
D. and (5) recovering the jack group, and dismantling the first sleeve 11 sleeved at the upper end of the reinforcement cage 1.
The jack 3 is a hollow jack, the reinforcement cage 1 comprises at least three main reinforcement bars 12, and the hollow jack is sleeved on the main reinforcement bars 12. A first wrapping layer 11 is arranged between the hollow jack and the main reinforcing steel bar 12. The jack group also comprises an oil pipe 5, and the jacks 3 are connected in series through the oil pipe 5.
Example 5
A construction method of a pre-positioned type broken concrete pile head, as shown in fig. 5 and 6, comprising the following steps,
A. sleeving a first wrapping layer 11 on the upper side of the pre-section of the reinforcement cage 1, fixing a jack group on the reinforcement cage 1 on the upper side of the pre-section 2, wherein the jack group comprises at least two jacks 3, the jacks 3 are all arranged in the reinforcement cage 1, sleeving a second wrapping layer 31 on the outer sides of the jacks 3 (the materials of the first wrapping layer 11 and the second wrapping layer 31 are pearl cotton or polyurethane or paper pulp), installing the reinforcement cage 1, and pouring concrete;
B. after the concrete is solidified, pressurizing the jack group to break the concrete of the layer where the pre-section 2 is located;
C. continuing to pressurize the jack group, jacking the concrete on the upper side of the pre-fracture surface 2, and lifting away the concrete on the upper side of the pre-fracture surface 2;
D. and (5) recovering the jack group, and dismantling the first sleeve 11 sleeved at the upper end of the reinforcement cage 1.
The jack 3 is a solid jack or a hollow jack, the reinforcement cage 1 comprises at least three main reinforcement bars 12, and the solid jack or the hollow jack is arranged between the adjacent main reinforcement bars 12.
The pre-section 2 is also provided with a cavity ring or a medium surface 4, the connecting pipe of the jack group is arranged at the inner side of the cavity ring, or the medium surface 4 is arranged at the lower side of the jack group.
In summary, the above-mentioned embodiments are only preferred embodiments of the present invention, and all equivalent changes and modifications made in the claims of the present invention should be covered by the claims of the present invention.
Claims (10)
1. A construction method of a pre-arranged type fracture concrete pile head is characterized in that: comprises the following steps of (a) carrying out,
A. sleeving a steel bar (12) on the upper side of the pre-section of the steel bar cage (1) with a first wrapping layer (11), fixing a jack group on the steel bar cage (1) on the upper side of the pre-section (2), wherein the jack group comprises at least two jacks (3), the jacks (3) are all arranged in the steel bar cage (1), sleeving a second wrapping layer (31) on the outer side of each jack (3), installing the steel bar cage (1), and pouring concrete;
B. after the concrete is solidified, pressurizing the jack group to break the concrete on the surface of the pre-fracture surface (2);
C. after the foundation pit is excavated, continuing pressurizing the jack group, jacking the concrete on the upper side of the pre-fracture surface (2), and hoisting the concrete on the upper side of the pre-fracture surface (2) by using a crane;
D. recovering the jack group, and finishing for the next use; and a first sleeve (11) sleeved at the upper end of the steel reinforcement cage (1) is recovered.
2. The construction method of the pre-positioned type fracture concrete pile head according to claim 1, characterized in that: the jack (3) is a solid jack or a hollow jack, the reinforcement cage (1) comprises at least three main reinforcement bars (12), and the solid jack or the hollow jack is arranged between the adjacent main reinforcement bars (12).
3. The construction method of the pre-positioned type fracture concrete pile head according to claim 1, characterized in that: the jack (3) is arranged on the inner side or the outer side of the reinforcement cage (1), and the jack (3) is a solid jack or a hollow jack.
4. The construction method of the pre-positioned type fracture concrete pile head according to claim 1, characterized in that: the jack (3) is a hollow jack, the reinforcement cage (1) comprises at least three main reinforcement bars (12), and the hollow jack is sleeved on the main reinforcement bars (12).
5. The construction method of the pre-positioned broken concrete pile head according to claim 2, 3 or 4, wherein: a first wrapping layer (11) is arranged between the hollow jack and the main reinforcement steel bar (12).
6. The construction method of the pre-positioned type fracture concrete pile head according to claim 1, characterized in that: the materials of the first wrapping layer (11) and the second wrapping layer (31) are isolation media.
7. The construction method of the pre-positioned type fracture concrete pile head according to claim 1, characterized in that: the pre-section (2) is also provided with a cavity ring.
8. The construction method of the pre-positioned type fracture concrete pile head according to claim 1, characterized in that: the pre-fracture surface (2) is also provided with a medium surface (4), and the medium surface (4) is arranged at the lower end of the jack group.
9. The construction method of the pre-positioned type fracture concrete pile head according to claim 1, characterized in that: the jacks (3) are connected in series or in parallel.
10. The construction method of the pre-positioned type fracture concrete pile head according to claim 9, characterized in that: the jack group also comprises an oil pipe (5), and the jacks (3) are connected in series through the oil pipe (5).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010052258.1A CN111236230A (en) | 2020-01-17 | 2020-01-17 | Construction method of pre-arranged type fracture concrete pile head |
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| CN202010052258.1A CN111236230A (en) | 2020-01-17 | 2020-01-17 | Construction method of pre-arranged type fracture concrete pile head |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113373926A (en) * | 2021-06-06 | 2021-09-10 | 中交路桥建设有限公司 | Separation device for pile head breaking and construction method |
| CN113585263A (en) * | 2021-07-28 | 2021-11-02 | 中建五局第三建设有限公司 | Pile head breaking equipment and method |
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| CN102425159A (en) * | 2011-08-31 | 2012-04-25 | 浙江大学城市学院 | Pile cutting construction method of bored concrete pile |
| CN204343285U (en) * | 2014-11-13 | 2015-05-20 | 中交隧道工程局有限公司 | A kind of pile foundation pile crown entirety abolishes structure |
| CN108547303A (en) * | 2018-04-11 | 2018-09-18 | 云南建投基础工程有限责任公司 | A kind of filling pile head abolishes auxiliary device and pile crown restructuring bankrupt |
| CN208668414U (en) * | 2018-05-29 | 2019-03-29 | 武汉钟鑫市政建设工程有限公司 | A kind of built-in cast-in-situ bored pile pile crown breaker |
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2020
- 2020-01-17 CN CN202010052258.1A patent/CN111236230A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102425159A (en) * | 2011-08-31 | 2012-04-25 | 浙江大学城市学院 | Pile cutting construction method of bored concrete pile |
| CN204343285U (en) * | 2014-11-13 | 2015-05-20 | 中交隧道工程局有限公司 | A kind of pile foundation pile crown entirety abolishes structure |
| CN108547303A (en) * | 2018-04-11 | 2018-09-18 | 云南建投基础工程有限责任公司 | A kind of filling pile head abolishes auxiliary device and pile crown restructuring bankrupt |
| CN208668414U (en) * | 2018-05-29 | 2019-03-29 | 武汉钟鑫市政建设工程有限公司 | A kind of built-in cast-in-situ bored pile pile crown breaker |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113373926A (en) * | 2021-06-06 | 2021-09-10 | 中交路桥建设有限公司 | Separation device for pile head breaking and construction method |
| CN113373926B (en) * | 2021-06-06 | 2024-05-07 | 中交路桥建设有限公司 | Separating device for pile head breaking and construction method |
| CN113585263A (en) * | 2021-07-28 | 2021-11-02 | 中建五局第三建设有限公司 | Pile head breaking equipment and method |
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Application publication date: 20200605 |