CN112854282A - Connecting structure and connecting method for pile cutting top and bearing platform of PHC precast pile - Google Patents
Connecting structure and connecting method for pile cutting top and bearing platform of PHC precast pile Download PDFInfo
- Publication number
- CN112854282A CN112854282A CN202110070101.6A CN202110070101A CN112854282A CN 112854282 A CN112854282 A CN 112854282A CN 202110070101 A CN202110070101 A CN 202110070101A CN 112854282 A CN112854282 A CN 112854282A
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- pile
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- phc precast
- steel sleeve
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- 238000005520 cutting process Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims description 6
- 230000002787 reinforcement Effects 0.000 claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims description 44
- 239000010959 steel Substances 0.000 claims description 44
- 239000002689 soil Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 210000003934 vacuole Anatomy 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 13
- 238000005452 bending Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
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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
-
- 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
- E02D5/223—Details of top sections of foundation 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
- E02D5/50—Piles comprising both precast concrete portions and concrete portions cast in situ
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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)
- Foundations (AREA)
Abstract
The invention discloses a connecting structure for a pile cutting pile top and a bearing platform of a PHC precast pile, wherein a pile foundation hollow core is formed inside the PHC precast pile. The connecting structure of the invention transmits bending moment through the main reinforcement of the reinforcement cage, increases the bending resistance of the pile foundation joint, has reasonable and clear structural stress, simple structure, convenient and quick construction and good economical efficiency, and is a great improvement and popularization of the PHC precast pile cutting process.
Description
Technical Field
The invention relates to the technical field of bridge structure design, in particular to a connecting structure and a connecting method for a pile cutting pile top and a bearing platform of a PHC precast pile.
Background
The PHC prefabricated pile foundation has low construction cost and quick construction, and is a pile foundation form with wide applicability. When the PHC precast pile bears larger horizontal force, the traditional connection between the pile cutting pile top and the bearing platform needs to continuously excavate a soil layer in a foundation pit, steel bars are bound, the construction is complex, the construction period is influenced, the construction risk is increased to a certain extent, and the development and the use of the PHC precast pile are limited. Therefore, the novel structure for connecting the pile top of the PHC precast pile with the bearing platform is designed and researched, has the advantages of simple structure, convenience in construction, safety, reliability, low manufacturing cost and wide applicability, is a great improvement and popularization on the PHC precast pile cutting process, and can create great social benefits.
Disclosure of Invention
The invention aims to provide a connecting structure for a pile cutting pile top and a bearing platform of a PHC precast pile, which has the advantages of simple structure, convenience in construction, safety and reliability.
In order to achieve the purpose, the technical scheme of the invention is as follows: the utility model provides a connection structure that is used for PHC precast pile to cut pile bolck and cushion cap, the inside pile foundation hollow that forms of PHC precast pile, its characterized in that the structure is established the steel sleeve outside the PHC precast pile including the cover, reserve the space between steel sleeve inner wall and the PHC precast pile outer wall, vacuole formation, the steel sleeve bottom carries out the cavity back cover with the back cover concrete, sets up the layer board in the pile foundation hollow, places the steel reinforcement cage in pile foundation hollow and the outside cavity of PHC precast pile, pouring concrete to pile bolck elevation.
Further, the wall thickness of the steel sleeve is 8-12 mm, and the total height of the sleeve is 1000-1500 mm; and a gap of 150-250 mm is reserved between the inner wall of the steel sleeve and the outer wall of the PHC precast pile.
Furthermore, according to the shape of the pile foundation, the outer wall and the inner wall of the steel sleeve are circular, square or polygonal, and the steel sleeve can select different section types and heights according to the shape of the pile foundation, and is not limited to a steel pipe structure.
Further, the concrete is C50 concrete.
The invention also aims to provide a method for connecting the pile cutting top and the bearing platform of the PHC precast pile, which has the advantages of simple structure, convenient construction, safety and reliability.
In order to achieve the purpose, the technical scheme of the invention is as follows: a method for connecting a pile cutting pile top of a PHC precast pile with a bearing platform is characterized in that after pile cutting of the pile top of the PHC precast pile is completed, a pile foundation hollow core is formed in the PHC precast pile, a steel sleeve is sleeved outside the PHC precast pile, and a gap is reserved between the inner wall of the steel sleeve and the outer wall of the PHC precast pile to form a cavity; emptying soil in the hollow core and the cavity of the pile foundation, and washing the steel sleeve and the side wall of the PHC tubular pile; and (3) carrying out cavity bottom sealing by using bottom sealing concrete, arranging a supporting plate in the hollow core of the pile foundation, respectively placing a reinforcement cage in the hollow core of the pile foundation and the cavity, closely vibrating after pouring concrete until the elevation of the pile top, and pouring a bearing platform outside the steel sleeve after the pile top is cut, namely finishing the connection of the pile top and the bearing platform of the PHC precast pile.
The invention has the beneficial effects that:
the invention relates to a structure for connecting a pile cutting pile top and a bearing platform of a PHC precast pile, which has the following advantages compared with the traditional structure for connecting the pile cutting pile top and the bearing platform: the construction cancels soil layer excavation and reinforcement binding outside the precast pile, the steel sleeve and the precast reinforcement cage are used for replacing the construction, and bending moment is transmitted through the main reinforcement of the reinforcement cage, so that the bending resistance of the connecting structure is improved. The pile cutting device has the advantages of simple structure, convenience in construction, safety, reliability, low manufacturing cost and wide applicability, and is a great improvement and popularization of the PHC precast pile cutting process.
Drawings
Fig. 1 is a schematic view of a connecting structure of a pile cutting top and a bearing platform of the PHC precast pile.
Fig. 2 is a sectional view a-a of fig. 1.
Detailed Description
The invention is further described below with reference to the figures and examples.
A new structure used for connecting the pile cutting pile top and the bearing platform of a PHC precast pile, a pile foundation hollow core is formed in the PHC precast pile 6; after pile cutting at the pile top of the precast pile is finished, inserting a steel sleeve 1, and reserving a gap of 200mm between the inner wall of the steel sleeve 1 and the side wall of the PHC precast pile to form a cavity; and (4) emptying the pile core of the precast pile and soil in the cavity, and washing the steel sleeve and the side wall of the PHC tubular pile clean. Carry out the cavity back cover with C50 back cover concrete 4, the pile core sets up layer board 8 simultaneously, transfers first steel reinforcement cage 2 and second steel reinforcement cage 5 respectively, and the cavity vibrates closely after cavity and pile foundation hollow core pouring C50 concrete 3, until pile bolck elevation.
The connection structure of the present invention is composed of three major parts. The first part is that after pile cutting of the pile top of the precast pile is completed, a steel sleeve 1 is inserted, the wall thickness of the steel sleeve 1 is 10mm, and the total height of the sleeve is 1200 mm; and a gap of 200mm is reserved between the inner wall of the steel sleeve 1 and the side wall of the PHC precast pile to form a cavity. The second part is that the layer board 8 is arranged in the hollow core of the pile foundation, the layer board is welded with the positioning steel bar and fixed on the pile top, and the distance from the pile top is not less than 3D (D is the diameter of the pile foundation) and not less than 1.5 m. The cavity is bottomed with C50 bottomed concrete 4. Second steel reinforcement cage 5 and first steel reinforcement cage 2 are transferred respectively to pile foundation hollow core and pile foundation outer cavity, and the steel reinforcement cage is transferred and is required to empty pile foundation hollow core and the interior earth of cavity before, erodees clean steel sleeve and PHC tubular pile lateral wall, and the length that the steel reinforcement cage gos deep into in the cushion cap is 40d (d is steel reinforcement cage owner muscle diameter). And the third part is that the pile core and the cavity are compacted by vibration after C50 concrete 3 is poured until the height of the pile top is high. And after the pile cutting top is finished, pouring a concrete cushion layer and a bearing platform outside the steel sleeve, namely finishing the connection of the pile cutting top and the bearing platform of the PHC precast pile.
The invention discloses a novel structure for connecting a pile cutting pile top and a bearing platform of a PHC precast pile, which is characterized in that a steel sleeve is inserted, and C50 concrete is poured to form a whole body by the steel sleeve and the PHC precast pile; bending moment is transmitted through the main reinforcement of the steel reinforcement cage, and bending resistance of the pile foundation joint is improved. The structure atress is reasonable clear and definite, and simple structure, construction convenience, quick, economic nature is good, is the very big improvement and the popularization of pile cutting technology to PHC precast pile.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (5)
1. The utility model provides a connection structure that is used for PHC precast pile to cut pile bolck and cushion cap, the inside pile foundation hollow that forms of PHC precast pile, its characterized in that the structure is established the steel sleeve outside the PHC precast pile including the cover, reserve the space between steel sleeve inner wall and the PHC precast pile outer wall, vacuole formation, the steel sleeve bottom carries out the cavity back cover with the back cover concrete, sets up the layer board in the pile foundation hollow, places the steel reinforcement cage in pile foundation hollow and the outside cavity of PHC precast pile, pouring concrete to pile bolck elevation.
2. A connecting structure for a pile cutting head and a pile cap of a PHC precast pile according to claim 1, wherein: the wall thickness of the steel sleeve is 8-12 mm, and the total height of the sleeve is 1000-1500 mm; and a gap of 150-250 mm is reserved between the inner wall of the steel sleeve and the outer wall of the PHC precast pile.
3. A connecting structure for a pile cutting head and a pile cap of a PHC precast pile according to claim 1, wherein: the concrete is C50 concrete.
4. A connecting structure for a pile cutting head and a pile cap of a PHC precast pile according to claim 1, wherein: according to the shape of the pile foundation, the outer wall and the inner wall of the steel sleeve are circular, square or polygonal matched with the shape of the pile foundation.
5. A method for connecting a pile cutting pile top of a PHC precast pile with a bearing platform is characterized in that after pile cutting of the pile top of the PHC precast pile is completed, a pile foundation hollow core is formed in the PHC precast pile, a steel sleeve is sleeved outside the PHC precast pile, and a gap is reserved between the inner wall of the steel sleeve and the outer wall of the PHC precast pile to form a cavity; emptying soil in the hollow core and the cavity of the pile foundation, and washing the steel sleeve and the side wall of the PHC tubular pile; and carrying out cavity bottom sealing by using bottom sealing concrete, arranging a supporting plate in the hollow core of the pile foundation, respectively placing a reinforcement cage in the hollow core of the pile foundation and the cavity, and closely vibrating after pouring the concrete until the elevation of the pile top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110070101.6A CN112854282A (en) | 2021-01-19 | 2021-01-19 | Connecting structure and connecting method for pile cutting top and bearing platform of PHC precast pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110070101.6A CN112854282A (en) | 2021-01-19 | 2021-01-19 | Connecting structure and connecting method for pile cutting top and bearing platform of PHC precast pile |
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| CN112854282A true CN112854282A (en) | 2021-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110070101.6A Pending CN112854282A (en) | 2021-01-19 | 2021-01-19 | Connecting structure and connecting method for pile cutting top and bearing platform of PHC precast pile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114411521A (en) * | 2021-12-20 | 2022-04-29 | 安徽省公路桥梁工程有限公司 | Concrete pavement and superposition structure for bridge deck of steel box girder and process thereof |
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| CN102425184A (en) * | 2011-12-13 | 2012-04-25 | 中交第二公路工程局有限公司 | Cap preserved hole construction method for deep-water soft soil foundation reverse low pile cap composite foundation |
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| CN211815986U (en) * | 2020-08-25 | 2020-10-30 | 中交天津港湾工程设计院有限公司 | High-pile beamless plate wharf structure |
| CN211898496U (en) * | 2019-12-31 | 2020-11-10 | 上海建工七建集团有限公司 | Pile splicing structure for precast pile and foundation bearing platform |
| CN212270920U (en) * | 2020-03-31 | 2021-01-01 | 宁波中交水运设计研究有限公司 | PHC tubular pile splicing structure |
| CN212294721U (en) * | 2020-05-08 | 2021-01-05 | 中国能源建设集团辽宁电力勘测设计院有限公司 | Prestressed pipe pile foundation and connection structure of prestressed pipe pile foundation and 35KV power transmission line iron tower |
-
2021
- 2021-01-19 CN CN202110070101.6A patent/CN112854282A/en active Pending
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| CN102134854A (en) * | 2011-02-16 | 2011-07-27 | 中交二航局第四工程有限公司 | Slipway underwater pile foundation and construction method thereof |
| CN102425184A (en) * | 2011-12-13 | 2012-04-25 | 中交第二公路工程局有限公司 | Cap preserved hole construction method for deep-water soft soil foundation reverse low pile cap composite foundation |
| CN204112354U (en) * | 2013-12-10 | 2015-01-21 | 江苏建华管桩有限公司 | The syndeton of concrete precast pile and pile foundation support table |
| KR20160009386A (en) * | 2014-07-16 | 2016-01-26 | (주)하경엔지니어링 | Precast concrete pile with sheath and the construction method therewith |
| CN107119677A (en) * | 2017-06-08 | 2017-09-01 | 太原理工大学 | A kind of pile tube stake top fricting shearing type power consumption attachment means and its construction method |
| CN108265635A (en) * | 2017-12-20 | 2018-07-10 | 中铁广州工程局集团有限公司 | A kind of coastal dock is hindered bridge pier by damage and reinforcement method is not repaired under Unloading Condition |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114411521A (en) * | 2021-12-20 | 2022-04-29 | 安徽省公路桥梁工程有限公司 | Concrete pavement and superposition structure for bridge deck of steel box girder and process thereof |
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