CN112854283B - A truncated cone connection structure of a pile-column structure passing through a structural bottom plate and its construction method - Google Patents
A truncated cone connection structure of a pile-column structure passing through a structural bottom plate and its construction method Download PDFInfo
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- CN112854283B CN112854283B CN202110300023.4A CN202110300023A CN112854283B CN 112854283 B CN112854283 B CN 112854283B CN 202110300023 A CN202110300023 A CN 202110300023A CN 112854283 B CN112854283 B CN 112854283B
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- pile
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- truncated cone
- column
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- 238000010276 construction Methods 0.000 title claims abstract description 21
- 230000002787 reinforcement Effects 0.000 claims abstract description 32
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 238000004873 anchoring Methods 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 2
- 238000005266 casting Methods 0.000 claims 1
- 239000011241 protective layer Substances 0.000 claims 1
- 238000009424 underpinning Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000010008 shearing Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000007788 roughening Methods 0.000 description 3
- 238000011282 treatment Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000002689 soil Substances 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
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
- E02D27/14—Pile framings, i.e. piles assembled to form the substructure
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/48—Foundations inserted underneath existing buildings or constructions
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/20—Miscellaneous comprising details of connection between elements
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
- Foundations (AREA)
Abstract
The invention belongs to a pile column structure round table type connection structure of a crossing structure bottom plate in the field of building structures and a construction method thereof. The technical scheme is that the pile structure is divided into a pile section at the lower part, a pile section at the upper part and a connecting part between the pile section and the pile section by a newly built basement structure bottom plate, the connecting part is a round table type connecting section, the round table type connecting section is a variable diameter section with a small upper part and a large lower part, the top section of the round table type connecting section is smaller than the section of the pile section, the newly built basement structure bottom plate and the round table type connecting section are poured into a whole, a reinforcement cage of the pile structure is split, a longitudinal main rib of the reinforcement cage is divided into a pile section main rib and a pile section main rib, the pile section main rib is anchored into the pile section and welded with the pile section main rib, the pile section main rib is anchored into the basement structure bottom plate upwards, and the reinforcement cage is in the round table type connecting section. The problem of current pile structure and structure bottom plate connected node reliability lower is solved.
Description
Technical Field
The invention belongs to the field of building structures, and particularly relates to a connection structure of underpinning piles and a structural bottom plate in the development engineering of an existing structural underground space.
Background
With the continuous promotion and the continuous penetration of urban development in China, the development of large cities is saturated, land resources are scarce, the improvement and the improvement of the stock land are urgent, and the update and the improvement of the existing building become new hot spots and new trends. In existing building reconstruction projects, it is a common situation to add basements or basement floors. The newly built underground structure engineering pile can be used as a underpinning pile, and the underpinning pile supports the upper existing structure in the underpinning stage, excavates the soil below and constructs the basement structure. After the new basement is built, the existing structural load of the upper part is borne by the structural column, the underpinning pile column section is withdrawn from use and chiseled, and the underpinning pile column section is connected with the structural bottom plate of the new basement and used as a main structural engineering pile to share the upper load. Because the pile structure directly passes through the newly built structure bottom plate, the pile structure and the structure bottom plate are required to be well connected, and force transmission can be reliably completed. The traditional pile structure and structure bottom plate connection node only depends on the friction force of the concrete interface to finish force transmission, so that the reliability is low, and the engineering pile bearing and pulling resistance requirements are difficult to be met.
Disclosure of Invention
In order to solve the technical problems, the invention provides a pile structure round table type connection structure of a traversing structure bottom plate and a construction method thereof, and solves the problem that the reliability of a connection node between the existing pile structure and the structure bottom plate is low.
The technical scheme is that the pile structure round table type connecting structure penetrating through the structural bottom plate is divided into a pile section at the lower part, a pile section at the upper part and a connecting part between the pile section and the pile section by a newly built basement structural bottom plate, the connecting part is a round table type connecting section, the round table type connecting section is a variable diameter section with a small upper part and a large lower part, the top section of the round table type connecting section is smaller than the section of the pile section, the newly built basement structural bottom plate and the round table type connecting section are poured into a whole, a reinforcement cage of the pile structure is divided into a pile section main rib and a pile section main rib by a split type, the pile section main rib is anchored into the pile section and welded with the pile section main rib, the pile section main rib is anchored into the basement structural bottom plate upwards, and the reinforcement cage is in the round table type connecting section and has a small upper part and a large lower part.
Based on the technical characteristics, the reinforced ring beam is arranged at the joint of the bottom plate of the newly built basement structure and the circular truncated cone type connecting section.
Based on the technical characteristics, a shear key or a water stop steel plate is additionally arranged on the outer interface of the truncated cone-shaped connecting section.
Based on the technical characteristics, the external interface of the truncated cone-shaped connecting section is a rough surface.
Based on the technical characteristics, the construction method of the pile column structure round table type connection structure of the crossing structure bottom plate comprises the following steps:
the construction method comprises the steps of integrally pouring pile sections, connecting parts and column sections, wherein the construction comprises reinforcement cages, and the reinforcement cages of the connecting parts gradually transition according to the sections of the upper column sections and the lower pile sections.
And step two, stripping the concrete reinforcement protection layer of the connecting part before pouring the newly built basement structure bottom plate and the newly built structure column to form a truncated cone-shaped connecting section.
And thirdly, pouring a newly built basement structure bottom plate and a structure column, and pulling out and anchoring the pile section main ribs into the newly built basement structure bottom plate.
And step four, chiseling the column section.
Based on the technical characteristics, in the third step, the construction of the reinforced ring beam is added, and the reinforced ring beam is arranged between the bottom plate of the newly-built basement structure and the circular truncated cone-shaped connecting section.
Based on the technical characteristics, in the second step, the outer interface of the truncated cone-shaped connecting section is subjected to roughening treatment.
Based on the technical characteristics, in the second step, a shear key or a water stop steel plate is additionally arranged on the outer interface of the circular truncated cone-shaped connecting section.
Compared with the prior art, the invention has the following beneficial effects:
According to the pile column structure round table type connecting structure of the crossing structure bottom plate and the construction mode thereof, the upper vertical load is effectively transmitted through the round table type connecting section with the variable diameter. Compared with the existing structure, the vertical load can be transmitted by the interfacial friction force between the pile structure and the bottom plate of the newly-built basement structure, and part of the vertical load can be converted into interfacial pressure. Meanwhile, the interface pressure can further improve the interface friction force, so that the shearing bearing capacity of the connecting node is greatly improved. And a reinforcing ring beam is arranged at the connection area of the bottom plate of the newly-built basement structure and the pile structure, so that node failure caused by connection surface damage is avoided. In addition, the reinforcement cage of the pile structure adopts a split type, and the main reinforcement of the pile section is anchored into the pile section and welded with the main reinforcement of the pile section. The pile section main rib is pulled out and anchored into the structural bottom plate when the structural bottom plate of the basement is newly built, so that the connection structure requirement of the pile body and the structural bottom plate is met, and the aim of fully exerting the pulling-resistant bearing capacity of the pile body is fulfilled.
Drawings
Fig. 1 is a schematic plan view of a pile structure truncated cone type connection structure passing through a structural bottom plate.
Fig. 2 is a schematic 1-1 cross-sectional view of a pile structure truncated cone type connection structure passing through a structural bottom plate.
Fig. 3 is a schematic view of a split reinforcement cage of a pile structure.
Fig. 4 is a schematic diagram of a construction method flow of a pile structure truncated cone-type connection structure passing through a structural bottom plate.
Fig. 5 is a schematic diagram of a second step of the construction method of the truncated cone-shaped connection structure of the pile structure passing through the structural bottom plate.
Fig. 6 is a step three schematic diagram of a construction method flow of a pile structure truncated cone type connection structure passing through a structural bottom plate.
Fig. 7 is a step four schematic diagram of a construction method flow of a pile structure round table type connection structure passing through a structural bottom plate.
Reference numerals:
1-pile section, 2-pile section, 3-round table connecting section, 4-new basement structure bottom plate, 5-new structure column, 6-reinforced ring beam, 7-pile section main rib and 8-pile section main rib.
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and are not intended to be limiting.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in fig. 1 and 2, the pile structure penetrates through the newly-built basement structure bottom plate 4, the pile structure is divided into a lower pile section 1, an upper pile section 2 and a connecting part between the lower pile section 1 and the upper pile section 2 by the newly-built basement structure bottom plate 4, the connecting part is a circular truncated cone-shaped connecting section 3, the circular truncated cone-shaped connecting section 3 is a variable diameter section with a small upper part and a large lower part, the top section of the circular truncated cone-shaped connecting section 3 is smaller than the section of the pile section 1, and the newly-built basement structure bottom plate 4 and the circular truncated cone-shaped connecting section 3 are integrally cast. And a reinforcing ring beam 6 is arranged at the connecting part of the newly-built basement structure bottom plate 4 and the pile structure so as to improve the node strength. The illustration in fig. 1 and 2 is that four pile structures pass through the new basement structure bottom plate 4, and the new structure columns 5 are located on the new basement structure bottom plate 4 in the surrounding range of the four pile structures, and the layout of the new structure columns 5 and the pile structures is only one illustration.
As shown in fig. 3, the reinforcement cage of the pile structure is split, the longitudinal main reinforcement of the reinforcement cage is divided into a pile section main reinforcement 8 and a pile section main reinforcement 7, the pile section main reinforcement 8 is anchored into the pile section 1 and welded with the pile section main reinforcement 7, and the pile section main reinforcement 7 is pulled out and anchored into the newly-built basement structure bottom plate 4 when the newly-built basement structure bottom plate 4 is constructed, so that the anti-pulling bearing capacity of a connecting node is enhanced, and the aim of fully exerting the anti-pulling bearing capacity of a pile body is fulfilled. Before the connection part of the pile structure and the basement structure bottom plate 4 is poured, the concrete reinforcement protection layer of the connection section part is stripped before the basement structure bottom plate 4 is constructed, a truncated cone-shaped structure with variable diameter is formed, and the outer surface is subjected to roughening treatment so as to enhance the shearing bearing capacity of the connection node. Or additionally arranging shear keys or water stopping steel plates on the external surface, so as to further improve the shearing resistance or water stopping performance of the interface.
One specific construction method of the present invention is shown in fig. 4 to 7.
The construction method comprises the steps of firstly constructing a pile structure, integrally pouring the pile section 1, the connecting part and the pile section 2, constructing a reinforcement cage comprising the connecting part, gradually transiting the reinforcement cage of the connecting part according to the sections of the upper pile section 2 and the lower pile section 1, and supporting an upper structural load A of the existing building by utilizing the pile structure.
Step two, as shown in fig. 5, excavating downwards, constructing each layer of basement structure beam plate, stripping the concrete reinforcement protection layer of the connection section part before pouring the newly-built basement structure bottom plate 4 and the newly-built structure column 5 to form a truncated cone-shaped connection section 3 with variable diameter, roughening the external surface, and performing other treatments on the external interface, such as adding shear keys or water-stopping steel plates, so as to further improve the shearing resistance or water-stopping performance of the interface.
And step three, as shown in fig. 6, pouring a newly-built basement structure bottom plate 4 and newly-built structural columns 5, arranging a reinforcing ring beam 6 between the newly-built basement structure bottom plate 4 and the circular truncated cone-shaped connecting section 3, and pulling out and anchoring pile section main ribs 7 into the newly-built basement structure bottom plate 4.
And step four, as shown in fig. 7, the column section 2 is removed from use and chiseled, the upper structural load A is borne by the newly-built structural column 5, the pile section 1 is connected with the newly-built basement structural bottom plate 4, and the pile section is used as a main structural engineering pile to share the upper load borne by the newly-built structural column 5.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions should also be considered as being within the scope of the present invention.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110300023.4A CN112854283B (en) | 2021-03-22 | 2021-03-22 | A truncated cone connection structure of a pile-column structure passing through a structural bottom plate and its construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110300023.4A CN112854283B (en) | 2021-03-22 | 2021-03-22 | A truncated cone connection structure of a pile-column structure passing through a structural bottom plate and its construction method |
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| Publication Number | Publication Date |
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| CN112854283A CN112854283A (en) | 2021-05-28 |
| CN112854283B true CN112854283B (en) | 2025-04-15 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113914653A (en) * | 2021-11-08 | 2022-01-11 | 中建四局第一建设有限公司 | Basement layer adding transformation process |
| CN117144960A (en) * | 2023-09-25 | 2023-12-01 | 中铁一局集团有限公司 | An underground space frame structure and its construction method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2008129395A (en) * | 2008-07-18 | 2010-01-27 | Общества с ограниченной ответственностью "МПО РИТА" (RU) | METHOD FOR MANUFACTURING AN ASSEMBLY OF A PILE WITH A EXISTING FOUNDATION UNDER IT AMPLIFICATION (OPTIONS) |
| CN107938655A (en) * | 2017-09-22 | 2018-04-20 | 上海市政工程设计研究总院（集团）有限公司 | PHC pile piles make the construction method in support system lattice column crossing structure region |
| CN215857817U (en) * | 2021-03-22 | 2022-02-18 | 华东建筑设计研究院有限公司 | Circular table connection structure of pile-column structure passing through the structural floor |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101775844B (en) * | 2010-02-02 | 2011-07-27 | 华东建筑设计研究院有限公司 | Connecting joint of ring beam of steel core concrete column used for topdown construction method foundation pit engineering |
| CN202466586U (en) * | 2012-01-11 | 2012-10-03 | 广州市鲁班建筑集团有限公司 | Pressure-stabilizing and pile-sealing device for anchored and jacked pile |
| CN103104102B (en) * | 2013-01-31 | 2015-07-01 | 中国建筑第八工程局有限公司 | Construction method for underground storey-addition reconstruction |
| JP5659275B2 (en) * | 2013-07-30 | 2015-01-28 | 三井住友建設株式会社 | Column and pile connection structure |
| KR101758988B1 (en) * | 2015-08-28 | 2017-07-18 | 이정엽 | Pile having height adjustment function |
| CN109898542B (en) * | 2019-03-19 | 2021-11-02 | 河北省交通规划设计研究院有限公司 | Method for preparing variable-diameter pile integrated structure |
| CN111042575A (en) * | 2019-12-27 | 2020-04-21 | 上海建工五建集团有限公司 | Steel structure upright post reinforcing structure and method for basement roof temporary road |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2008129395A (en) * | 2008-07-18 | 2010-01-27 | Общества с ограниченной ответственностью "МПО РИТА" (RU) | METHOD FOR MANUFACTURING AN ASSEMBLY OF A PILE WITH A EXISTING FOUNDATION UNDER IT AMPLIFICATION (OPTIONS) |
| CN107938655A (en) * | 2017-09-22 | 2018-04-20 | 上海市政工程设计研究总院（集团）有限公司 | PHC pile piles make the construction method in support system lattice column crossing structure region |
| CN215857817U (en) * | 2021-03-22 | 2022-02-18 | 华东建筑设计研究院有限公司 | Circular table connection structure of pile-column structure passing through the structural floor |
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