CN114482022B - Construction method of prestressed manual hole digging pile - Google Patents
Construction method of prestressed manual hole digging pile Download PDFInfo
- Publication number
- CN114482022B CN114482022B CN202111475499.8A CN202111475499A CN114482022B CN 114482022 B CN114482022 B CN 114482022B CN 202111475499 A CN202111475499 A CN 202111475499A CN 114482022 B CN114482022 B CN 114482022B
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- pile
- well
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- concrete
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- 238000010276 construction Methods 0.000 title claims abstract description 18
- 230000002787 reinforcement Effects 0.000 claims abstract description 37
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 25
- 239000010959 steel Substances 0.000 claims abstract description 25
- 239000004567 concrete Substances 0.000 claims abstract description 15
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims description 10
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 230000009471 action Effects 0.000 abstract description 2
- 238000003466 welding Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
-
- 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
- E02D5/66—Mould-pipes or other moulds
- E02D5/68—Mould-pipes or other moulds for making bulkheads or elements thereof
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a construction method of a prestressed manual hole digging pile, which comprises the steps of arranging an enlarged pile well, welding transverse steel bars on a main reinforcement of a steel reinforcement cage, pouring reinforced concrete of the enlarged pile well, providing lower support and fixation for the prestress application of the main reinforcement of the steel reinforcement cage of a pile body structure, and carrying out tensioning operation on the upper part of the main reinforcement of the steel reinforcement cage of the pile body structure through a reinforced locking port by a tensioning device; the reinforced concrete structure of the enlarged pile well and the welded transverse steel bars can provide great resistance for the vertical main bars of the steel reinforcement cage, so that the setting height of the enlarged pile well and the consumption of concrete are reduced; the arrangement of the steel beam or the reinforced concrete beam can facilitate the prestress tensioning operation of the jack on the vertical steel bar; the enhanced locking port can provide a larger counterforce foundation, meets the tensioning bearing requirement of the jack, and avoids damage caused by the action of larger pressure when the traditional locking port is adopted; the construction method has the characteristics of convenient construction, good economy, environmental protection, popularization and application and the like.
Description
Technical Field
The invention relates to the technical field of geotechnical engineering, in particular to a construction method of a prestressed manual hole digging pile.
Background
The prestressed pile structure has good crack resistance, and has good economy when the structure mainly bears horizontal force and bending tension; the manual hole digging pile has the advantages of adjustable section shape, good stress form, capability of providing large resistance, low engineering investment, wide application in engineering, and the vertical main reinforcement of the pile body structure is the main stress reinforcement of the structure, so that the stress structure of the vertical main reinforcement of the prestressed pile body is difficult to form at present, and the manual hole digging pile is applied in engineering according to non-prestressed piles. The construction method of the prestressed manual hole digging pile is significant in order to effectively exert the advantages of the prestressed structure and the manual hole digging pile, and has the characteristics of convenience in construction, good economy, environmental protection, contribution to popularization and application and the like.
Disclosure of Invention
(One) solving the technical problems
The technical problem to be solved by the invention is to provide a construction method of the prestressed manual hole digging pile, which can effectively realize safe and quick construction of the prestressed manual hole digging pile and has good economical efficiency.
(II) technical scheme
In order to achieve the above purpose, the present invention provides the following technical solutions: in order to solve the technical problems, the invention provides a construction method of a prestressed manual hole digging pile, which is characterized by comprising the following steps:
A. positioning a pile body structure plane, excavating a pile well at the top of the pile body structure, and arranging an enhanced locking port;
B. Pile wells below the reinforced locking openings of the pile body structure are excavated in sections, and retaining wall structures are arranged in sections;
C. Excavating an enlarged pile well with the pile body structure design pile bottom elevation of 0.5-1.0m below, and arranging a retaining wall structure;
D. binding pile body structure reinforcement cages, wherein the vertical main ribs at the bottom of the reinforcement cages are increased by 0.5-1.0m than the design length, and the vertical main ribs at the top of the reinforcement cages are 0.5-0.8m higher than the design length;
E. Welding transverse steel bars at 0.3-0.5m of the bottom of the vertical main bars of the steel reinforcement cage;
F. placing the pile body structure reinforcement cage into an excavated pile well, and pouring concrete for expanding the height range of the pile well;
G. The pile well height concrete to be expanded reaches the design strength, a steel bar tensioning device is arranged at the top of the locking notch, and the vertical main bars of the steel bar cage are tensioned and temporarily fixed;
H. Pouring the concrete of the residual pile well;
I. and (5) removing the locking opening top tensioning device when the concrete in the pile well reaches the design strength.
The enhanced locking notch in the step A is preferably provided with a height of 2-3m and a thickness of 0.5-1.0m;
Preferably, in the step C, the diameter of the enlarged pile well is larger than that of the upper pile well structure by not smaller than 0.5m, and the height of the enlarged pile well is 0.5-1.0m;
preferably, the tensioning device in the step G may be a support beam formed by a jack and a steel beam or a reinforced concrete beam.
(III) beneficial effects
The invention has the main advantages that: the lower support and fixation can be provided for the prestress application of the vertical main reinforcement of the reinforcement cage of the pile body structure by arranging the expansion pile well, welding the transverse reinforcement with the main reinforcement of the reinforcement cage, and pouring the reinforced concrete of the expansion pile well, and the tensioning device can perform tensioning operation on the upper part of the vertical main reinforcement of the reinforcement cage of the pile body structure through the reinforced locking opening; the reinforced concrete structure of the enlarged pile well and the welded transverse steel bars can provide great resistance for the vertical main bars of the steel reinforcement cage, so that the setting height of the enlarged pile well and the consumption of concrete are reduced; the arrangement of the steel beam or the reinforced concrete beam can facilitate the prestress tensioning operation of the jack on the vertical steel bar; the enhanced locking notch can provide a larger counterforce foundation, meets the tensioning bearing requirement of the jack, and avoids damage caused by the action of larger pressure when the traditional locking notch is adopted. The construction method has the characteristics of convenient construction, good economy, environmental protection, popularization and application and the like.
Drawings
FIG. 1 is a schematic diagram of a construction method of a prestressed manual hole digging pile in a front section (I);
FIG. 2 is a schematic diagram of a side section (II) of a construction method of a prestressed manual hole-digging pile according to the present invention;
FIG. 3 is a schematic plan view of a construction method of a prestressed manual hole-digging pile according to the present invention;
The component names and corresponding labels are shown: pile body structure 1, upper pile body structure 11, enlarged pile body structure 12, reinforced locking port 2, retaining wall 3, vertical main reinforcement 4, transverse reinforcement 5 and supporting beam 6.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to the drawings, embodiment 1
The construction method of the prestressed manual hole digging pile is characterized by comprising the following steps:
A. the pile body structure 1 is positioned in a plane, a pile well at the top of the pile body structure 1 is excavated, and an enhanced locking port 2 is arranged;
B. Pile wells below the reinforced locking notch 2 of the pile body structure 1 are excavated in sections, and a retaining wall 3 structure is arranged in sections;
C. excavating a pile body structure 1, designing an enlarged pile well with the height of 0.5-1.0m below the pile bottom, and arranging a retaining wall 3 structure;
D. binding a reinforcement cage of the pile body structure 1, wherein the vertical main ribs 4 at the bottom of the reinforcement cage are increased by 0.5-1.0m than the design length, and the vertical main ribs 4 at the top of the reinforcement cage are 0.5-0.8m higher than the design length;
E. The bottom 0.3-0.5m of the vertical main reinforcement 4 of the reinforcement cage is welded with a transverse reinforcement 5;
F. the reinforcement cage of the pile body structure 1 is put into an excavated pile well, and concrete for enlarging the height range of the pile well is poured;
G. The pile well height concrete to be expanded reaches the design strength, a steel bar tensioning device is arranged at the top of the locking notch, and the steel bar cage vertical main bars 4 are tensioned and temporarily fixed;
H. Pouring the concrete of the residual pile well;
I. and (5) removing the locking opening top tensioning device when the concrete in the pile well reaches the design strength.
In the specific implementation process, the enhanced locking notch 2 in the step A is set to be 2-3m in height, and the thickness of the locking notch is 0.5-1.0m;
in the specific implementation process, the diameter of the enlarged pile well in the step C is not smaller than 0.5m larger than that of the pile well structure at the upper part, and the height of the enlarged pile well is 0.5-1.0m;
the tensioning device in the step G may be combined with a supporting beam 6 formed by a steel beam or reinforced concrete beam by a jack.
In the concrete implementation process, the pile body structure 1 comprises an upper pile body structure 11 and an enlarged pile body structure 12.
It should be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (2)
1. The construction method of the prestressed manual hole digging pile is characterized by comprising the following steps:
A. positioning a pile body structure plane, excavating a pile well at the top of the pile body structure, and arranging an enhanced locking port;
B. Pile wells below the reinforced locking openings of the pile body structure are excavated in sections, and retaining wall structures are arranged in sections;
C. Excavating an enlarged pile well with the pile body structure design pile bottom elevation of 0.5-1.0m below, and arranging a retaining wall structure;
D. binding pile body structure reinforcement cages, wherein the vertical main ribs at the bottom of the reinforcement cages are increased by 0.5-1.0m than the design length, and the vertical main ribs at the top of the reinforcement cages are 0.5-0.8m higher than the design length;
E. Welding transverse steel bars at 0.3-0.5m of the bottom of the vertical main bars of the steel reinforcement cage;
F. placing the pile body structure reinforcement cage into an excavated pile well, and pouring concrete for expanding the height range of the pile well;
G. The pile well height concrete to be expanded reaches the design strength, a steel bar tensioning device is arranged at the top of the locking notch, and the vertical main bars of the steel bar cage are tensioned and temporarily fixed;
H. Pouring the concrete of the residual pile well;
I. removing the locking opening top tensioning device when the concrete in the pile well reaches the design strength;
wherein, the enhanced locking notch in the step A is set to be 2-3m in height and 0.5-1.0m in thickness;
And C, the diameter of the enlarged pile well is larger than that of the upper pile well structure by not smaller than 0.5m, and the height of the enlarged pile well is 0.5-1.0m.
2. The method of constructing a prestressed manual hole-digging pile according to claim 1, wherein the tensioning means in step G is a support beam combination formed by a jack and a steel beam or a reinforced concrete beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111475499.8A CN114482022B (en) | 2021-12-06 | 2021-12-06 | Construction method of prestressed manual hole digging pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111475499.8A CN114482022B (en) | 2021-12-06 | 2021-12-06 | Construction method of prestressed manual hole digging pile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114482022A CN114482022A (en) | 2022-05-13 |
| CN114482022B true CN114482022B (en) | 2024-07-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111475499.8A Active CN114482022B (en) | 2021-12-06 | 2021-12-06 | Construction method of prestressed manual hole digging pile |
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| Country | Link |
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| CN (1) | CN114482022B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106930277A (en) * | 2017-04-14 | 2017-07-07 | 华煜建设集团有限公司 | A kind of construction of manual-excavation cast-in-place pile method |
| CN107366289A (en) * | 2017-06-29 | 2017-11-21 | 宁波冶金勘察设计研究股份有限公司 | Foundation ditch concrete support pilework that live borehole pours and preparation method thereof |
| CN111576408A (en) * | 2020-06-09 | 2020-08-25 | 江苏景源万河环境科技有限公司 | Construction method of expanded head prestressed concrete anchor rod |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02153110A (en) * | 1988-11-30 | 1990-06-12 | Daikure:Kk | Constructing method for bottom enlarging and deepening pile |
| CN203808053U (en) * | 2014-03-21 | 2014-09-03 | 刘献刚 | Concrete combined action pile |
| CN104805830B (en) * | 2015-04-28 | 2016-07-06 | 粤水电轨道交通建设有限公司 | Non-shot rock uplift pile construction method |
| CN205557512U (en) * | 2016-04-13 | 2016-09-07 | 解维军 | Recoverable prestressing force anti -floating pile |
| CN106120721B (en) * | 2016-08-19 | 2018-12-25 | 化学工业岩土工程有限公司 | Multi-layer bottom-expanding manual hole digging cast-in-place pile and construction method |
| CN110616708B (en) * | 2019-09-29 | 2025-05-16 | 国网安徽省电力有限公司建设分公司 | A kind of variable cross-section cast-in-place pile and construction method thereof |
| CN112302004A (en) * | 2020-11-11 | 2021-02-02 | 辽宁工程技术大学 | Cast-in-place pile with upper straight rod and lower expanded-base structure for reducing negative frictional resistance and construction method thereof |
-
2021
- 2021-12-06 CN CN202111475499.8A patent/CN114482022B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106930277A (en) * | 2017-04-14 | 2017-07-07 | 华煜建设集团有限公司 | A kind of construction of manual-excavation cast-in-place pile method |
| CN107366289A (en) * | 2017-06-29 | 2017-11-21 | 宁波冶金勘察设计研究股份有限公司 | Foundation ditch concrete support pilework that live borehole pours and preparation method thereof |
| CN111576408A (en) * | 2020-06-09 | 2020-08-25 | 江苏景源万河环境科技有限公司 | Construction method of expanded head prestressed concrete anchor rod |
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| CN114482022A (en) | 2022-05-13 |
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