CN112281817A - Steel precast pile construction method suitable for water level fluctuation area - Google Patents
Steel precast pile construction method suitable for water level fluctuation area Download PDFInfo
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- CN112281817A CN112281817A CN202011257978.8A CN202011257978A CN112281817A CN 112281817 A CN112281817 A CN 112281817A CN 202011257978 A CN202011257978 A CN 202011257978A CN 112281817 A CN112281817 A CN 112281817A
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- precast pile
- steel
- water level
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- steel plate
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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
- E02D5/24—Prefabricated piles
- E02D5/28—Prefabricated piles made of steel or other metals
- E02D5/285—Prefabricated piles made of steel or other metals tubular, e.g. prefabricated from sheet pile elements
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- 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
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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
- E02D5/223—Details of top sections of foundation piles
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- 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 steel precast pile construction method suitable for a water level fluctuation area, which comprises the following steps: the method comprises the following steps: arranging the connecting steel plate on the pile top of the precast pile main body; step two: the outer-coated reinforced concrete and the pouring pile casing are respectively connected with the precast pile main body in a welding mode, and the outer-coated reinforced concrete is poured to the bottom of the connecting steel plate in a factory; step three: reserving reinforcing steel bars on the precast pile main body, and welding the precast pile main body with the reserved reinforcing steel bars; the invention aims at the adverse effect of the underground water level change on the steel precast pile due to the fact that the steel precast pile part on the water level of the underground water in the dry season adopts the externally-coated reinforced concrete to separate the underground water level change, realizes the durability design of the steel precast pile with smaller engineering investment, is suitable for basic engineering of engineering such as buildings, bridges, railways and the like, and creates conditions for popularization and application of the steel precast pile.
Description
Technical Field
The invention relates to the technical field of underground pile foundation construction, in particular to a steel precast pile construction method suitable for a water level fluctuation area.
Background
The steel precast pile is used as a precast component which is convenient and fast to construct and environment-friendly, and is generally applied to building engineering, near-water cofferdams and foundation pit engineering.
According to the requirements of relevant national specifications, the wall thickness of the steel precast pile is determined according to the service life and the environmental annual corrosion rate, for example, the annual corrosion rate of the steel precast pile above the ground is 0.05-0.1 mm/y, the annual corrosion rate of the steel precast pile above the ground is 0.05mm/y, the annual corrosion rate of the steel precast pile below the ground is 0.03mm/y, and the annual corrosion rate of the steel precast pile below the ground is 0.1-0.3 mm/y. In order to improve the durability of the steel precast pile, measures such as coating a corrosion-proof layer on the outer surface, increasing corrosion allowance, protecting a cathode and the like can be generally adopted.
When the steel precast pile is regarded as the pile foundation, groundwater fluctuation corrodes steel great, and the underground pile foundation does not possess the anticorrosive coating again and applies paint the condition with a brush, and its wall thickness is great, and economic nature is relatively poor, and consequently, the steel precast pile can't generally promote in pile foundation engineering.
The person skilled in the art is dedicated to solving the above technical drawbacks.
Disclosure of Invention
In view of the defects in the prior art, the invention aims to solve the problems that when the steel precast pile is used as a pile foundation, underground water fluctuation causes great corrosion to steel, the underground pile foundation does not have an anticorrosive coating brushing condition, the wall thickness is large, and the economical efficiency is poor.
In order to achieve the technical purpose, the invention provides a steel precast pile construction method suitable for a water level fluctuation area, wherein the precast pile comprises a precast pile main body, a connecting steel plate, an underground water level fluctuation area and precast pile reserved steel bars; the underground water level fluctuation area comprises an outer reinforced concrete and a pouring casing;
the construction method comprises the following steps:
the method comprises the following steps: arranging the connecting steel plate on the pile top of the precast pile main body;
step two: the outer-coated reinforced concrete and the pouring pile casing are respectively connected with the precast pile main body in a welding mode, and the outer-coated reinforced concrete is poured to the bottom of the connecting steel plate in a factory;
step three: reserving reinforcing steel bars on the precast pile main body, and welding the precast pile main body with the reserved reinforcing steel bars;
step four: the precast pile main part transports after the scene, adopts the pile driver to press the precast pile main part to design elevation after, pour the pile casing below groundwater dry season water level, connect at last the reservation reinforcing bar of precast pile main part pours the bottom plate structure, the precast pile main part is connected through reservation reinforcing bar and bottom plate structure, accomplishes the precast pile main part is connected with the bottom plate structure.
Preferably, the precast pile body is made of a steel material.
Preferably, the connecting steel plate is divided into two parts in the step one, after the inner steel plate is welded with the precast pile main body, the outer steel plate is welded with the outer reinforced concrete and the pouring casing, and finally the inner steel plate and the outer steel plate are welded.
Preferably, in the first step, a concrete tamping hole is reserved on the connecting steel plate, and a steel bar perforation is further arranged on the connecting steel plate.
Preferably, in the second step, the external reinforced concrete is provided with construction steel bars and welded with the precast pile main body.
Preferably, a steel bar head or a steel bar connector is reserved in a steel bar perforation reserved in the connecting steel plate.
The invention has the beneficial effects that:
aiming at the adverse effect of the underground water level change on the steel precast pile due to the fact that the steel precast pile part on the water level of the underground water in the dry season adopts the externally-coated reinforced concrete, the durability design of the steel precast pile is realized with smaller engineering investment, and the method is applicable to basic engineering of engineering such as buildings, bridges, railways and the like, and creates conditions for popularization and application of the steel precast pile.
Drawings
FIG. 1 is a schematic view of the process of the present invention;
FIG. 2 is a schematic view showing the processing of the connecting steel plate according to the present invention;
fig. 3 is a schematic diagram of the field implementation of the present invention.
In the figure: the prefabricated pile comprises a prefabricated pile body 1, a connecting steel plate 2, an inner steel plate 21, an outer steel plate 22, an underground water level fluctuation area 3, reinforced concrete wrapped outside 31, a casting pile casing 32, prefabricated pile reserved steel bars 4, concrete tamping holes 5 and steel bar perforation 6.
Detailed Description
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.
Example (b):
as shown in fig. 1 to 3, a construction method of a steel precast pile suitable for a water level fluctuation area includes a precast pile main body 1, a connection steel plate 2, an underground water level fluctuation area 3, and precast pile reserved steel bars 4.
The groundwater level fluctuation area 3 comprises an outer-coated reinforced concrete 31 and a pouring casing 32.
The steps of the using method are as follows:
the method comprises the following steps: arranging a connecting steel plate 2 on the pile top of the precast pile main body 1;
step two: the external reinforced concrete 31 and the pouring pile casing 32 are respectively welded with the precast pile main body 1, the external reinforced concrete 31 is poured to the bottom of the connecting steel plate 2 in a factory, micro-expansion concrete can be adopted to ensure the protection effect, and the heights of the external reinforced concrete 31 and the pouring pile casing 32 are determined according to the water level of the groundwater in the dry period;
step three: reserving reinforcing steel bars on the precast pile main body 1, and welding the precast pile main body 1 with the reserved reinforcing steel bars;
step four: after precast pile main part 1 transported to the scene, adopt the pile driver to press precast pile main part 1 to design elevation after, pour and protect a section of thick bamboo 32 below groundwater dry season water level, connect the reservation reinforcing bar of precast pile main part 1 at last, pour the bottom plate structure, precast pile main part 1 is connected with the bottom plate structure through reserving the reinforcing bar, accomplishes being connected of precast pile main part 1 and bottom plate structure.
Specifically, the precast pile body 1 is made of a steel material.
Specifically, in the step one, the connecting steel plate 2 is divided into two parts, after the inner steel plate 21 is welded with the precast pile main body 1, the outer steel plate 22 is welded with the outer reinforced concrete 31 and the pouring casing 32, and finally the inner steel plate 21 and the outer steel plate 22 are welded.
Specifically, a concrete pouring hole 5 is reserved on the connecting steel plate 2 in the step one, so that the requirement of concrete pouring of the outer-coated reinforced concrete 31 is met; still be provided with the reinforcing bar on the connecting steel plate 2 and perforate 6, make things convenient for the preformed pile main part 1 reserve the reinforcing bar and be connected with the bottom plate structure.
Specifically, in the second step, the externally-coated reinforced concrete 31 is provided with structural steel bars and welded with the precast pile main body 1, so that the externally-coated reinforced concrete 31 is effectively connected with the precast pile main body 1 during pile pressing; therefore, the precast pile main body 1 is completely isolated from the contact with the fluctuating groundwater, and the adverse effect of the fluctuating groundwater on the precast pile main body 1 is thoroughly avoided.
Specifically, a reinforcing steel bar head or a reinforcing steel bar connector is reserved in a reinforcing steel bar through hole 6 reserved in the connecting steel plate 2, so that the later-stage on-site reinforcing steel bar connection is facilitated.
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 (6)
1. A steel precast pile construction method suitable for a water level fluctuation area is characterized by comprising the following steps: the precast pile comprises a precast pile main body (1), a connecting steel plate (2), an underground water level fluctuation area (3) and precast pile reserved steel bars (4);
the underground water level fluctuation area (3) comprises an outer-coated reinforced concrete (31) and a pouring pile casing (32);
the construction method comprises the following steps:
the method comprises the following steps: arranging the connecting steel plate (2) on the pile top of the precast pile main body (1);
step two: the external reinforced concrete (31) and the pouring pile casing (32) are respectively welded with the precast pile main body (1), and the external reinforced concrete (31) is poured to the bottom of the connecting steel plate (2) in a factory;
step three: reserving reinforcing steel bars on the precast pile main body (1), and welding the precast pile main body (1) with the reserved reinforcing steel bars;
step four: precast pile main part (1) transports after the scene, adopts pile driver to press precast pile main part (1) to design elevation after, pour and protect a section of thick bamboo (32) below groundwater dry season water level, connect at last the bottom plate structure is pour to the reserve reinforcing bar of precast pile main part (1), precast pile main part (1) is connected through reserve reinforcing bar and bottom plate structure, accomplishes precast pile main part (1) and bottom plate structure's being connected.
2. The construction method of the steel precast pile suitable for the water level fluctuation zone according to claim 1, wherein: the precast pile main body (1) is made of steel materials.
3. The construction method of the steel precast pile suitable for the water level fluctuation zone according to claim 1, wherein: in the first step, the connecting steel plate (2) is divided into two parts, after the inner steel plate (21) is welded with the precast pile main body (1), the outer steel plate (22) is welded with the outer-coated reinforced concrete (31) and the pouring pile casing (32), and finally the inner steel plate (21) and the outer steel plate (22) are welded.
4. The construction method of the steel precast pile suitable for the water level fluctuation zone according to claim 1, wherein: in the first step, a concrete pouring hole (5) is reserved in the connecting steel plate (2), and a steel bar through hole (6) is further formed in the connecting steel plate (2).
5. The construction method of the steel precast pile suitable for the water level fluctuation zone according to claim 1, wherein: in the second step, the external reinforced concrete (31) is provided with constructional steel bars and welded with the precast pile main body (1).
6. The construction method of the steel precast pile suitable for the water level fluctuation zone according to claim 4, wherein: and reserving a steel bar head or a steel bar connector in a steel bar through hole (6) reserved in the connecting steel plate (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011257978.8A CN112281817B (en) | 2020-11-12 | 2020-11-12 | Steel precast pile construction method suitable for water level fluctuation zone |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011257978.8A CN112281817B (en) | 2020-11-12 | 2020-11-12 | Steel precast pile construction method suitable for water level fluctuation zone |
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| CN112281817A true CN112281817A (en) | 2021-01-29 |
| CN112281817B CN112281817B (en) | 2023-05-05 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202577381U (en) * | 2011-07-26 | 2012-12-05 | 杭州固华复合材料科技有限公司 | Repairing and reinforcing structure for ocean splash zone pile foundation |
| CN204343286U (en) * | 2014-11-28 | 2015-05-20 | 中油辽河工程有限公司 | A kind of steel pipe pile support |
| CN104695459A (en) * | 2013-12-10 | 2015-06-10 | 江苏建华管桩有限公司 | Connection method of concrete precast pile and pile foundation cap |
| CN104846850A (en) * | 2015-04-07 | 2015-08-19 | 中交四航工程研究院有限公司 | Steel sheet pile protection system for tidal range area and water level fluctuation area and construction method thereof |
| CN108755675A (en) * | 2018-07-18 | 2018-11-06 | 中交第航务工程勘察设计院有限公司 | A kind of steel-pipe pile pile cover structure and the construction method for improving steel-pipe pile corrosion resistance |
| JP2020020184A (en) * | 2018-08-01 | 2020-02-06 | 三谷セキサン株式会社 | Connection structure between pile head of ready-made pile and foundation footing |
-
2020
- 2020-11-12 CN CN202011257978.8A patent/CN112281817B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202577381U (en) * | 2011-07-26 | 2012-12-05 | 杭州固华复合材料科技有限公司 | Repairing and reinforcing structure for ocean splash zone pile foundation |
| CN104695459A (en) * | 2013-12-10 | 2015-06-10 | 江苏建华管桩有限公司 | Connection method of concrete precast pile and pile foundation cap |
| CN204343286U (en) * | 2014-11-28 | 2015-05-20 | 中油辽河工程有限公司 | A kind of steel pipe pile support |
| CN104846850A (en) * | 2015-04-07 | 2015-08-19 | 中交四航工程研究院有限公司 | Steel sheet pile protection system for tidal range area and water level fluctuation area and construction method thereof |
| CN108755675A (en) * | 2018-07-18 | 2018-11-06 | 中交第航务工程勘察设计院有限公司 | A kind of steel-pipe pile pile cover structure and the construction method for improving steel-pipe pile corrosion resistance |
| JP2020020184A (en) * | 2018-08-01 | 2020-02-06 | 三谷セキサン株式会社 | Connection structure between pile head of ready-made pile and foundation footing |
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| CN112281817B (en) | 2023-05-05 |
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