CN112281817B - Steel precast pile construction method suitable for water level fluctuation zone - Google Patents
Steel precast pile construction method suitable for water level fluctuation zone Download PDFInfo
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- CN112281817B CN112281817B CN202011257978.8A CN202011257978A CN112281817B CN 112281817 B CN112281817 B CN 112281817B CN 202011257978 A CN202011257978 A CN 202011257978A CN 112281817 B CN112281817 B CN 112281817B
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- precast pile
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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)
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- Civil Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a construction method of a steel precast pile suitable for a water level fluctuation zone, which comprises the following steps: step one: arranging the connecting steel plates on the pile tops of the precast pile bodies; step two: the outer reinforced concrete and the pouring pile casing are respectively welded with the precast pile main body, and the outer 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, wherein the precast pile main body is welded with the reserved reinforcing steel bars; the invention aims at the adverse effect of the outside reinforced concrete to the steel precast pile, which is used for isolating the change of the groundwater level, on the steel precast pile part in the water level of the groundwater dead period, realizes the durability design of the steel precast pile with smaller engineering investment, can be suitable for the foundation engineering of the engineering such as building, bridge, railway and the like, and creates conditions for the 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 zone.
Background
The steel precast pile is used as a precast member which is convenient to construct and environment-friendly, and is widely applied to constructional engineering, water cofferdam 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 annual corrosion rate of the combined environment, 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 an anticorrosive coating on the outer surface, increasing corrosion allowance, protecting a cathode and the like can be generally adopted.
When the steel precast pile is used as a pile foundation, groundwater fluctuation is large in corrosion to steel, the underground pile foundation is not provided with an anticorrosive coating brushing condition, the wall thickness is large, and the economical efficiency is poor, so that the steel precast pile cannot be widely popularized in pile foundation engineering.
Those skilled in the art are directed to solving the above-mentioned technical drawbacks.
Disclosure of Invention
In view of the above-mentioned defects in the prior art, the technical purpose of the invention is to solve the problems that when a steel precast pile is used as a pile foundation, groundwater fluctuation corrodes steel greatly, the underground pile foundation does not have a coating condition of an anti-corrosion layer, the wall thickness is large, and the economical efficiency is poor.
In order to achieve the technical aim, the invention provides a construction method of a steel precast pile suitable for a water level fluctuation zone, wherein the precast pile comprises a precast pile main body, a connecting steel plate, an underground water level fluctuation zone and precast pile reserved steel bars; the underground water level fluctuation zone comprises an outsourcing reinforced concrete and a pouring pile casing;
the construction method comprises the following steps:
step one: arranging the connecting steel plates on the pile tops of the precast pile bodies;
step two: the outer reinforced concrete and the pouring pile casing are respectively welded with the precast pile main body, and the outer 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, wherein the precast pile main body is welded with the reserved reinforcing steel bars;
step four: after the precast pile main body is transported to the site, the precast pile main body is pressed to the designed elevation by adopting a pile pressing machine, the casting pile casing is below the water level of the groundwater in the dead water period, finally, reserved reinforcing steel bars of the precast pile main body are connected, a bottom plate structure is cast, and the precast pile main body is connected with the bottom plate structure through the reserved reinforcing steel bars to complete the connection of the precast pile main body and the bottom plate structure.
Preferably, the precast pile body is made of steel material.
Preferably, in the first step, the connecting steel plates are divided into two pieces, after the welding of the inner steel plates and the precast pile main body is completed, the outer steel plates are welded with the outsourcing reinforced concrete and the casting pile casing, and finally the welding of the inner steel plates and the outer steel plates is completed.
Preferably, in the first step, a concrete pouring 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 reinforced concrete is provided with a construction bar welded to the precast pile body.
Preferably, the steel bar perforation reserved on the connecting steel plate leaves a steel bar head or a steel bar connector.
The invention has the beneficial effects that:
the invention aims at the adverse effect of the outside reinforced concrete to the steel precast pile, which is used for isolating the change of the groundwater level at the water level of the groundwater in the period of the water dead, and realizes the durability design of the steel precast pile with smaller engineering investment, thus being applicable to the foundation engineering of the engineering such as building, bridge, railway and the like and creating conditions for the popularization and application of the steel precast pile.
Drawings
FIG. 1 is a schematic process diagram of the present invention;
FIG. 2 is a schematic view of the processing of the joined steel sheet according to the present invention;
FIG. 3 is a schematic diagram of an in-situ implementation of the present invention.
In the figure: the precast pile comprises a precast pile body 1, a connecting steel plate 2, a steel plate 21, a steel plate on the inner side, a steel plate on the outer side 22, a fluctuation zone of the 3 underground water level, reinforced concrete covered by a 31, a casting pile casing 32, reserved steel bars of the precast pile 4, concrete casting holes 5 and steel bar perforation 6.
Detailed Description
The conception, specific structure, and technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, features, and effects of the present invention.
Examples:
as shown in fig. 1 to 3, a construction method of a steel precast pile suitable for a water level fluctuation zone, the precast pile comprises a precast pile body 1, a connecting steel plate 2, an underground water level fluctuation zone 3 and precast pile reserved steel bars 4.
The groundwater level fluctuation area 3 comprises an outsourcing reinforced concrete 31 and a casting casing 32.
The using method comprises the following steps:
step one: a connecting steel plate 2 is arranged at the pile top of the precast pile main body 1;
step two: the outer reinforced concrete 31 and the pouring pile casing 32 are respectively welded with the precast pile main body 1, the outer 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 outer reinforced concrete 31 and the pouring pile casing 32 are determined according to the water level of the ground water in the dead water 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 the precast pile main body 1 is transported to the site, after the precast pile main body 1 is pressed to the designed elevation by adopting a pile pressing machine, pouring the pile casing 32 below the water level of the ground water in the dead water period, finally connecting reserved reinforcing steel bars of the precast pile main body 1, pouring a bottom plate structure, and connecting the precast pile main body 1 with the bottom plate structure through the reserved reinforcing steel bars to complete the connection of the precast pile main body 1 and the bottom plate structure.
Specifically, the precast pile body 1 is made of a steel material.
Specifically, in the first step, the connecting steel plates 2 are divided into two pieces, and after the welding of the inner steel plates 21 and the precast pile body 1 is completed, the outer steel plates 22 are welded with the exterior reinforced concrete 31 and the casting pile casing 32, and finally, the welding of the inner steel plates 21 and the outer steel plates 22 is completed.
Specifically, in the first step, a concrete pouring hole 5 is reserved on the connecting steel plate 2, so that the concrete pouring of the outsourcing reinforced concrete 31 is satisfied; the connecting steel plate 2 is also provided with a steel bar perforation 6, so that the reserved steel bars of the precast pile main body 1 are conveniently connected with the bottom plate structure.
Specifically, in the second step, the external reinforced concrete 31 is configured with constructional steel bars to be welded with the precast pile body 1, so that the external reinforced concrete 31 is effectively connected with the precast pile body 1 during pile pressing; therefore, the contact between the precast pile main body 1 and the fluctuating groundwater is completely isolated, and the adverse effect of the fluctuating groundwater on the precast pile main body 1 is thoroughly avoided.
Specifically, the reinforcement perforation 6 reserved on the connecting steel plate 2 is provided with a reinforcement head or a reinforcement connector, so that the connection of the reinforcement in the later field is facilitated.
The foregoing describes in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the invention by one of ordinary skill in the art without undue burden. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.
Claims (4)
1. A construction method of a steel precast pile suitable for a water level fluctuation zone 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 zone (3) and precast pile reserved steel bars (4);
the underground water level fluctuation zone (3) comprises an outsourcing reinforced concrete (31) and a pouring pile casing (32);
the construction method comprises the following steps:
step one: arranging the connecting steel plate (2) at the pile top of the precast pile main body (1);
the precast pile main body (1) is made of steel materials;
dividing the connecting steel plates (2) into two pieces, after the welding of the inner steel plates (21) and the precast pile main body (1) is completed, welding the outer steel plates (22) with the outsourcing reinforced concrete (31) and the pouring pile casing (32), and finally, completing the welding of the inner steel plates (21) and the outer steel plates (22);
step two: the outer reinforced concrete (31) and the pouring pile casing (32) are respectively welded with the precast pile main body (1), and the outer 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), wherein the precast pile main body (1) is welded with the reserved reinforcing steel bars;
step four: after the precast pile main body (1) is transported to the site, the precast pile main body (1) is pressed to the designed elevation by adopting a pile pressing machine, the casting pile casing (32) is below the water level of the ground water in the dead water period, the reserved reinforcing steel bars of the precast pile main body (1) are finally connected, the bottom plate structure is cast, and the precast pile main body (1) is connected with the bottom plate structure through the reserved reinforcing steel bars, so that the precast pile main body (1) is connected with the bottom plate structure.
2. The construction method of the steel precast pile applicable to the water level fluctuation zone according to claim 1, wherein: in the first step, concrete pouring holes (5) are reserved in the connecting steel plates (2), and reinforcing steel bar perforations (6) are further formed in the connecting steel plates (2).
3. The construction method of the steel precast pile applicable to the water level fluctuation zone according to claim 1, wherein: in the second step, the outsourcing reinforced concrete (31) is provided with constructional steel bars which are welded with the precast pile main body (1).
4. The construction method of the steel precast pile applicable to the water level fluctuation zone according to claim 2, wherein: and a reinforcing steel bar perforation (6) reserved on the connecting steel plate (2) is reserved with a reinforcing steel bar head or a reinforcing steel bar connector.
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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| 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 CN112281817A (en) | 2021-01-29 |
| CN112281817B true CN112281817B (en) | 2023-05-05 |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN104846850B (en) * | 2015-04-07 | 2017-01-11 | 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 |
| JP7145678B2 (en) * | 2018-08-01 | 2022-10-03 | 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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