CN111877364A - Deformation-controlled pile structure of prestressed section steel construction method - Google Patents
Deformation-controlled pile structure of prestressed section steel construction method Download PDFInfo
- Publication number
- CN111877364A CN111877364A CN202010783840.5A CN202010783840A CN111877364A CN 111877364 A CN111877364 A CN 111877364A CN 202010783840 A CN202010783840 A CN 202010783840A CN 111877364 A CN111877364 A CN 111877364A
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- Prior art keywords
- steel
- prestressed
- shaped
- sleeve
- pile
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
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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
- E02D5/20—Bulkheads or similar walls made of prefabricated parts and concrete, including reinforced concrete, in situ
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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
- E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
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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
- E02D5/58—Prestressed concrete piles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0046—Production methods using prestressing techniques
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention relates to a deformation-controlled pile structure of a prestressed section steel construction method, wherein section steel is arranged in a triaxial cement-soil mixing pile; the section steel is formed by welding H-shaped steel, a prestressed steel sleeve is welded on the inner side of a flange on the side of the H-shaped steel facing a pit, a full-length steel plate is welded at the end part of the flange of the H-shaped steel to serve as a reinforcing structure, and the full-length steel plate is parallel to a web plate of the H-shaped steel to form a box-shaped structure; a steel plate is arranged at the bottom end of the H-shaped steel; and a prestressed steel strand penetrates through the inner pipe of the prestressed steel sleeve and extends axially along the prestressed steel sleeve, wherein one end of the prestressed steel strand is fixed on a steel plate at the bottom end of the box-shaped steel, and the other end of the prestressed steel strand penetrates through the top end of the prestressed steel sleeve to be fixed on a prestressed locking device of the concrete top ring beam after being subjected to prestressed tensioning of the steel strand. The pile structure adopting the novel prestressed profile steel construction method for controlling deformation can enhance the rigidity, bending resistance, shearing resistance and deformation resistance of the pile profile steel of the construction method.
Description
Technical Field
The invention relates to a prestressed section steel construction pile, in particular to a prestressed section steel construction pile structure capable of controlling deformation.
Background
The pile in the foundation pit supporting engineering method is a supporting form with the common stress of a triaxial cement soil mixing pile and H-shaped steel, has the water stopping and soil retaining effects, and has the advantages of small construction space, high speed, shape steel recycling and the like. However, the rigidity and the deformation resistance of the pile in the construction method are slightly lower than those of a cast-in-place pile, so that the pile in the construction method is greatly deformed after foundation pit excavation to cause water seepage or is difficult to pull out and recover, and the application range of the pile in the construction method is limited.
Disclosure of Invention
The invention provides a deformation-controlled prestressed section steel construction method pile structure, which is characterized in that section steel is reinforced to increase the rigidity of the section steel, a prestressed steel strand arranged on the side of a section steel near a pit is used for tensioning to generate prestress, when the side of the support construction method pile near the pit is bent to generate tension due to excavation of a foundation pit, the prestress needs to be overcome firstly, then the inner side of the construction method pile is tensioned along with increase of load, and the structure can avoid the defects of large deformation and easy cracking and water seepage of the pile in the traditional construction method.
In order to achieve the purpose, the technical scheme of the invention is as follows: a pile structure of a prestressed steel construction method for controlling deformation comprises a triaxial cement-soil mixing pile, profile steel and a prestressed steel sleeve, wherein the profile steel is arranged in the triaxial cement-soil mixing pile; the section steel is formed by welding H-shaped steel, a prestressed steel sleeve is welded on the inner side of a flange on the side of the H-shaped steel facing a pit, a full-length steel plate is welded at the end part of the flange of the H-shaped steel to serve as a reinforcing structure, and the full-length steel plate is parallel to a web plate of the H-shaped steel to form a box-shaped structure; a steel plate is arranged at the bottom end of the H-shaped steel; and a prestressed steel strand penetrates through the inner pipe of the prestressed steel sleeve and extends axially along the prestressed steel sleeve, wherein one end of the prestressed steel strand is fixed on a steel plate at the bottom end of the box-shaped steel, and the other end of the prestressed steel strand penetrates through the top end of the prestressed steel sleeve to be fixed on a prestressed locking device of the concrete top ring beam after being subjected to prestressed tensioning of the steel strand.
Further, the bottom end of the H-shaped steel and the steel plate are semi-fixed by a locking notch; and the subsequent section steel recovery is facilitated.
Furthermore, the cross section of the section steel is of a box-shaped structure.
The invention has the beneficial effects that: the invention can avoid the defects of large deformation and easy water seepage of the pile in the current construction method, improves the integral rigidity of the pile in the construction method, reduces the deformation of the pile body and reduces the construction cost in the same implementation environment by reinforcing the section steel and applying the prestress.
Drawings
FIG. 1 is a plan view of a pile structure of the deformation-controlling prestressed steel-working method of the present invention;
FIG. 2 is a side view of a pile structure of the deformation-controlling prestressed steel-working method of the present invention;
FIG. 3 is a cross-sectional view taken along A-A of FIG. 2;
fig. 4 is a sectional view taken along B-B in fig. 3.
Detailed Description
The invention is further described with reference to the following figures and examples.
As shown in fig. 1 to 4, a pile structure of a novel prestressed steel construction method for controlling deformation has the following specific structure:
1) the three-axis cement-soil mixing pile 1 is characterized in that section steel 2 is arranged in the three-axis cement-soil mixing pile 1;
2) the cross section of shaped steel 2 is the box structure, and shaped steel 2 is formed by H shaped steel 3 welding, and it has prestressing force steel sleeve 4 to weld at the flange of H shaped steel 3 near the hole side inboard, and at H shaped steel 3 flange of a wing tip, full length welded steel plate 5 is as strengthening the structure, and full length welded steel plate 5 is parallel with the H shaped steel web, forms the box structure. The bottom end of the H-shaped steel is provided with a steel plate 6, and is semi-fixed by a locking notch 7; and the subsequent section steel recovery is facilitated.
3) The inner pipe of the prestressed steel casing 4 is provided with prestressed steel strands 8, the prestressed steel strands 8 axially extend along the prestressed steel casing 4, one end of each prestressed steel strand is fixed to a steel plate 6 at the bottom end of the box-shaped steel, and the other end of each prestressed steel strand penetrates through the top end of the prestressed steel casing to be fixed to a prestressed locking device 9 of the concrete top ring beam after being subjected to prestressed tensioning.
The pile structure adopting the novel prestressed profile steel construction method for controlling deformation can enhance the rigidity, bending resistance, shearing resistance and deformation resistance of the pile profile steel of the construction method.
Claims (3)
1. The utility model provides a control prestressing force shaped steel worker method stake structure of warping, includes triaxial soil cement mixing pile (1), shaped steel (2), prestressing force steel sleeve (4), its characterized in that: the three-shaft cement soil mixing pile (1) is internally provided with profile steel (2); the section steel (2) is formed by welding H-shaped steel (3), a prestressed steel sleeve (4) is welded on the inner side of a flange on the side, facing a pit, of the H-shaped steel (3), a full-length steel plate (5) is welded at the end part of the flange of the H-shaped steel (3) to serve as a reinforcing structure, and the full-length steel plate (5) is parallel to a web plate of the H-shaped steel to form a box-type structure; a steel plate (6) is arranged at the bottom end of the H-shaped steel; the prestressed steel sleeve (4) is characterized in that a prestressed steel strand (8) penetrates through the inner tube of the prestressed steel sleeve (4), the prestressed steel strand (8) axially extends along the prestressed steel sleeve (4), one end of the prestressed steel strand is fixed on a steel plate (6) at the bottom end of the box-shaped steel, and the other end of the prestressed steel strand penetrates through the top end of the prestressed steel sleeve to be fixed on a prestressed locking device (9) of the concrete top ring beam after being subjected to prestressed tensioning.
2. The deformation-controlled prestressed steel-construction-method pile structure according to claim 1, characterized in that: the bottom end of the H-shaped steel and the steel plate (6) are semi-fixed by a locking notch (7); and the subsequent section steel recovery is facilitated.
3. The deformation-controlled prestressed steel-construction-method pile structure according to claim 1, characterized in that: the cross section of the section steel (2) is of a box-shaped structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010783840.5A CN111877364A (en) | 2020-08-06 | 2020-08-06 | Deformation-controlled pile structure of prestressed section steel construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010783840.5A CN111877364A (en) | 2020-08-06 | 2020-08-06 | Deformation-controlled pile structure of prestressed section steel construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111877364A true CN111877364A (en) | 2020-11-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010783840.5A Pending CN111877364A (en) | 2020-08-06 | 2020-08-06 | Deformation-controlled pile structure of prestressed section steel construction method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201809782U (en) * | 2010-07-30 | 2011-04-27 | 中国建筑第八工程局有限公司 | Internal climbing tower crane foundation support device |
| CN205242388U (en) * | 2015-12-23 | 2016-05-18 | 中铁十二局集团有限公司 | Enhancement mode SMW worker method pilework |
| CN209260711U (en) * | 2018-12-13 | 2019-08-16 | 中冶集团武汉勘察研究院有限公司 | Synchronous device for filling is pulled out in a kind of SMW engineering method stake |
| JP2019148130A (en) * | 2018-02-28 | 2019-09-05 | 株式会社長谷工コーポレーション | Composite underground outer wall and construction method of the same |
| CN209568445U (en) * | 2018-12-27 | 2019-11-01 | 江苏苏州地质工程勘察院 | A kind of post-stressed SMW engineering method pilework |
-
2020
- 2020-08-06 CN CN202010783840.5A patent/CN111877364A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201809782U (en) * | 2010-07-30 | 2011-04-27 | 中国建筑第八工程局有限公司 | Internal climbing tower crane foundation support device |
| CN205242388U (en) * | 2015-12-23 | 2016-05-18 | 中铁十二局集团有限公司 | Enhancement mode SMW worker method pilework |
| JP2019148130A (en) * | 2018-02-28 | 2019-09-05 | 株式会社長谷工コーポレーション | Composite underground outer wall and construction method of the same |
| CN209260711U (en) * | 2018-12-13 | 2019-08-16 | 中冶集团武汉勘察研究院有限公司 | Synchronous device for filling is pulled out in a kind of SMW engineering method stake |
| CN209568445U (en) * | 2018-12-27 | 2019-11-01 | 江苏苏州地质工程勘察院 | A kind of post-stressed SMW engineering method pilework |
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Application publication date: 20201103 |
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| RJ01 | Rejection of invention patent application after publication |