CN110453609B - Simple and convenient steel pipe pile support preloading structure and method - Google Patents
Simple and convenient steel pipe pile support preloading structure and method Download PDFInfo
- Publication number
- CN110453609B CN110453609B CN201910799088.0A CN201910799088A CN110453609B CN 110453609 B CN110453609 B CN 110453609B CN 201910799088 A CN201910799088 A CN 201910799088A CN 110453609 B CN110453609 B CN 110453609B
- Authority
- CN
- China
- Prior art keywords
- precast
- piles
- concrete
- layer
- hydraulic jack
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a simple and convenient steel pipe pile support preloading structure which comprises four concrete precast piles, wherein the four concrete precast piles are respectively distributed at four top points of a square, the four concrete precast piles are divided into two pairs, a steel cross beam is commonly supported above each pair of concrete, a pair of I-shaped steel beams which are parallel to each other are commonly supported on the two steel cross beams, a plurality of layers of preloading precast slabs and sleepers are commonly supported above the pair of I-shaped steel beams, a hydraulic jack is arranged below the first layer of preloading precast slabs, a buffer sleeper is arranged between the hydraulic jack and the bottom end faces of the first layer of preloading precast slabs, and the hydraulic jack is coaxial with a target concrete precast pile. Simultaneously, the method for preloading the steel pipe pile support by using the structure is also disclosed.
Description
Technical Field
The invention relates to the technical field of beam support preloading construction, in particular to a simple steel pipe pile support preloading structure and a preloading method by using the structure.
Background
With the continuous development of bridge construction, bridge beam body erection methods are thousands of, but traditional support type beam body erection is continuously and widely used due to the characteristics of economy, safety, simplicity and convenience, and the like, different support structures are different according to beam body structures and construction conditions, and prepressing is carried out to ensure the support safety and eliminate various deformations no matter after each support is erected. However, for the pre-pressing of the PHC tubular pile support with the independent pier group pile type and the single pile bearing capacity being large, the traditional surcharge pre-pressing structure is adopted, the single pile bearing capacity independent pier bearing capacity is large according to the design, the pre-pressing surcharge weight is also very large, the contact area between the pre-pressing point of only 1.8m of the center distance of the PHC tubular pile and surcharge objects is small, the surcharge height is high, the risk is high, and the PHC tubular pile support is uneconomical. The prepressing structure for the bracket is not simple, less in labor amount, high in safety and high in working efficiency.
There is therefore a need for a method or apparatus that addresses the above-mentioned problems.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a simple and convenient steel pipe pile support preloading structure which can save a large amount of labor and improve the working efficiency.
The technical solution of the invention is as follows: the utility model provides a simple and convenient steel-pipe pile support surmounts and carries pre-compaction structure which characterized in that: the structure comprises four concrete precast piles 1, the four concrete precast piles 1 are respectively distributed at four vertexes of a square, the four concrete precast piles 1 are divided into two pairs, a steel cross beam 2 is commonly supported above each pair of concrete precast piles, an anti-overturning pile 3 is further arranged below the steel cross beam 2, a pair of I-shaped steels 4 which are parallel to each other are commonly supported on the two steel cross beams 2, the I-shaped steels 4 are perpendicular to the steel cross beams 2, a first layer of stacking precast slabs 5 is commonly supported above the pair of I-shaped steels 4, a first layer of sleepers 6 is arranged above the first layer of stacking precast slabs 5, a second layer of stacking precast slabs 5 is supported above the first layer of sleepers 6, an nth layer of stacking precast slabs is supported above the nth-1 layer of sleepers in the structure, hydraulic jacks 7 are arranged below the first layer of stacking precast slabs 5, and a buffer sleeper 8 is arranged between the hydraulic jack 7 and the bottom end surface of the first layer of the stacking precast slab 5, and the hydraulic jack 7 is coaxial with the target concrete precast pile 1.
The method for preloading the preloading of the steel pipe pile support by using the simple steel pipe pile support preloading structure is characterized by comprising the following steps of: the method comprises the following steps:
firstly, adopting a high-frequency large-tonnage pile driving hammer to drive all the precast concrete piles 1 into a target area to be used as a support foundation for installing a main beam, wherein every four precast concrete piles 1 form a group, the four precast concrete piles 1 in the group of precast piles are respectively distributed at four top points of a square,
two steel cross beams 2 are arranged above each group of concrete precast piles 1, I-steel, multilayer stacking precast slabs and sleepers are arranged above the steel cross beams 2, the total mass of the steel cross beams 2, the stacking precast slabs and the sleepers is guaranteed to reach 30% -40% of the total preloading load of each group of concrete precast piles 1, a hydraulic jack 7 is arranged below the first layer of stacking precast slabs 5, the hydraulic jack 7 is guaranteed to be coaxial with a target concrete precast pile 1 needing pre-compaction treatment, the hydraulic jack 7 works to apply downward pressure to the target concrete precast pile 1, the hydraulic jack keeps static load after the pre-compaction pressure reaches 1.1-1.2 times of the bearing capacity of a single pile, the load is kept for 24 hours, and the average settlement is not less than 1mm,
after the pre-pressing of the current concrete precast pile 1 is finished, the hydraulic jack 7 and the buffer sleeper 8 matched with the hydraulic jack are replaced to the next target concrete precast pile 1, and the loading step is repeated until the whole pre-pressing of a group of four concrete precast piles 1 is finished.
Compared with the prior art, the invention has the following advantages:
the simple and convenient steel pipe pile support preloading structure with the structure form and the method for carrying out steel pipe pile support preloading by using the preloading structure fundamentally solve the problems that the center distance of the support piles of the group piles of the independent PHC tubular piles is small, the designed bearing capacity is large, the weight of the whole preloading object is large, the preloading height is high, the preloading is volatile and stable, the preloading space of a single preloading space is insufficient, and the like. The method originally adopts a mode of prepressing the single precast concrete pile one by one, so that the prepressing operation of each precast concrete pile can be realized by piling the weight of 2/5 with the bearing capacity of the independent pier. Therefore, a large amount of labor can be saved, and the working efficiency is improved, so that the prepressing structure and the prepressing method have various advantages, are particularly suitable for popularization and application in the field, and have wide market prospects.
Drawings
Fig. 1 is a front view of the structure of the present invention.
Fig. 2 is a top view of the structure of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings, as shown in fig. 1 and 2: a simple and convenient steel pipe pile support preloading structure comprises four concrete precast piles 1, wherein the four concrete precast piles 1 are respectively distributed at four top points of a square, the four concrete precast piles 1 are divided into two pairs, a steel cross beam 2 is commonly supported above each pair of concrete precast piles, an anti-overturning pile 3 is further arranged below the steel cross beam 2, a pair of I-shaped steels 4 which are parallel to each other are commonly supported on the two steel cross beams 2, the I-shaped steels 4 are perpendicular to the steel cross beams 2, a first layer of preloading precast slabs 5 are commonly supported above the pair of I-shaped steels 4, a first layer of sleepers 6 is arranged above the first layer of preloading precast slabs 5, a second layer of preloading precast slabs 5 is supported above the first layer of sleepers 6, and the nth layer of preloading precast slabs are supported above the nth-1 layer of sleepers in the structure, a hydraulic jack 7 is arranged below the first layer of the stacked precast slabs 5, a buffer sleeper 8 is arranged between the hydraulic jack 7 and the bottom end face of the first layer of the stacked precast slabs 5, and the hydraulic jack 7 is coaxial with the target concrete precast pile 1.
When the piling preloading structure of the simple steel pipe pile support is used for piling preloading, the piling preloading is carried out according to the following steps:
firstly, adopting a high-frequency large-tonnage pile driving hammer to drive all the precast concrete piles 1 into a target area to be used as a support foundation for installing a main beam, wherein every four precast concrete piles 1 form a group, the four precast concrete piles 1 in the group of precast piles are respectively distributed at four top points of a square,
two steel cross beams 2 are arranged above each group of concrete precast piles 1, I-steel, multilayer stacking precast slabs and sleepers are arranged above the steel cross beams 2, the total mass of the steel cross beams 2, the stacking precast slabs and the sleepers is guaranteed to reach 30% -40% of the total preloading load of each group of concrete precast piles 1, a hydraulic jack 7 is arranged below the first layer of stacking precast slabs 5, the hydraulic jack 7 is guaranteed to be coaxial with a target concrete precast pile 1 needing pre-compaction treatment, the hydraulic jack 7 works to apply downward pressure to the target concrete precast pile 1, the hydraulic jack keeps static load after the pre-compaction pressure reaches 1.1-1.2 times of the bearing capacity of a single pile, the load is kept for 24 hours, and the average settlement is not less than 1mm,
after the pre-pressing of the current concrete precast pile 1 is finished, the hydraulic jack 7 and the buffer sleeper 8 matched with the hydraulic jack are replaced to the next target concrete precast pile 1, and the loading step is repeated until the whole pre-pressing of a group of four concrete precast piles 1 is finished.
For convenience, generally, the selected stacking precast slabs can completely cover the square formed by the four concrete precast piles 1, if the construction site conditions are limited, and the stacking precast slabs which can completely cover the square cannot be found, the stacking precast slabs can be firstly placed at a position deviated to one side in the actual operation, after the pre-pressing operation is performed on the two concrete precast piles 1 at the side, the stacking precast slabs can be placed again to be deviated to the other side, and the pre-pressing operation is performed on the two concrete precast piles 1 at the side respectively according to the steps (as shown in fig. 2).
Claims (2)
1. The utility model provides a simple and convenient steel-pipe pile support surmounts and carries pre-compaction structure which characterized in that: the structure comprises four concrete precast piles (1), the four concrete precast piles (1) are respectively distributed at four top points of a square, the four concrete precast piles (1) are divided into two pairs, a steel cross beam (2) is commonly supported above each pair of concrete precast piles, meanwhile, an anti-overturning pile (3) is further arranged below the steel cross beam (2), a pair of I-shaped steels (4) which are parallel to each other are commonly supported on the two steel cross beams (2), the I-shaped steels (4) are perpendicular to the steel cross beams (2), a first layer of stacking precast slabs (5) are commonly supported above the pair of I-shaped steels (4), a first layer of sleepers (6) are arranged above the first layer of stacking precast slabs (5), a second layer of stacking precast slabs (5) are supported above the first layer of sleepers (6), and the nth layer of stacking precast slabs are supported above the nth-1 layer of sleepers in the structure, and a hydraulic jack (7) is arranged below the first layer of the stacking precast slab (5), a buffer sleeper (8) is arranged between the hydraulic jack (7) and the bottom end face of the first layer of the stacking precast slab (5), and the hydraulic jack (7) is coaxial with the target concrete precast pile (1).
2. A method for preloading a simple steel pipe pile support in a preloading manner according to claim 1, which is characterized in that: the method comprises the following steps:
firstly, adopting a high-frequency large-tonnage pile driving hammer to drive all the precast concrete piles (1) into a target area to serve as a support foundation for installing a main beam, wherein every four precast concrete piles (1) form a group, the four precast concrete piles (1) in the group of precast piles are respectively distributed at the four top points of a square,
two steel cross beams (2) are arranged above each group of concrete precast piles (1), I-steel, multilayer stacking precast slabs and sleepers are arranged above the steel cross beams (2), the total mass of the steel cross beams (2), the stacking precast slabs and the sleepers is guaranteed to be 30% -40% of the total pre-pressing load of each group of concrete precast piles (1), a hydraulic jack (7) is arranged below the first layer of stacking precast slabs (5), the hydraulic jack (7) is guaranteed to be coaxial with a target concrete precast pile (1) needing pre-pressing treatment, the hydraulic jack (7) works to apply downward pressure to the target concrete precast pile (1), the hydraulic jack keeps static load after the pre-pressing pressure reaches 1.1-1.2 times of the single-pile bearing capacity, the load is kept for 24 hours, and the average settlement is not less than 1mm,
after the pre-pressing of the current concrete precast pile (1) is finished, the hydraulic jack (7) and the buffer sleeper (8) matched with the hydraulic jack are replaced to the next target concrete precast pile (1), and the loading step is repeated until the pre-pressing of all the four concrete precast piles (1) is finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910799088.0A CN110453609B (en) | 2019-08-28 | 2019-08-28 | Simple and convenient steel pipe pile support preloading structure and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910799088.0A CN110453609B (en) | 2019-08-28 | 2019-08-28 | Simple and convenient steel pipe pile support preloading structure and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110453609A CN110453609A (en) | 2019-11-15 |
| CN110453609B true CN110453609B (en) | 2020-12-11 |
Family
ID=68489502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910799088.0A Active CN110453609B (en) | 2019-08-28 | 2019-08-28 | Simple and convenient steel pipe pile support preloading structure and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110453609B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102535535A (en) * | 2012-02-28 | 2012-07-04 | 中建三局建设工程股份有限公司 | Construction method of pre-building supported and settled foundation on ground and fixing after pre-pressing for high-rise building with basement |
| CN102605783A (en) * | 2012-01-10 | 2012-07-25 | 葛培中 | Construction method for applying prestress to anchor jacked piles |
| CN203755165U (en) * | 2013-12-30 | 2014-08-06 | 高运控股集团有限公司 | Bracket structure for steel pipe pile |
| JP2016199956A (en) * | 2015-04-14 | 2016-12-01 | 新日鉄住金エンジニアリング株式会社 | Bridge construction method |
| CN208777343U (en) * | 2018-07-20 | 2019-04-23 | 河南省基本建设科学实验研究院有限公司 | A kind of dead load test on pile foundation preloading device |
-
2019
- 2019-08-28 CN CN201910799088.0A patent/CN110453609B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102605783A (en) * | 2012-01-10 | 2012-07-25 | 葛培中 | Construction method for applying prestress to anchor jacked piles |
| CN102535535A (en) * | 2012-02-28 | 2012-07-04 | 中建三局建设工程股份有限公司 | Construction method of pre-building supported and settled foundation on ground and fixing after pre-pressing for high-rise building with basement |
| CN203755165U (en) * | 2013-12-30 | 2014-08-06 | 高运控股集团有限公司 | Bracket structure for steel pipe pile |
| JP2016199956A (en) * | 2015-04-14 | 2016-12-01 | 新日鉄住金エンジニアリング株式会社 | Bridge construction method |
| CN208777343U (en) * | 2018-07-20 | 2019-04-23 | 河南省基本建设科学实验研究院有限公司 | A kind of dead load test on pile foundation preloading device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110453609A (en) | 2019-11-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20210310265A1 (en) | Core-Pulling Transfer Device and Construction Method for Reverse Demolition of Reinforced Concrete Structures | |
| CN108265618B (en) | Underground reverse storey-adding construction method for viaduct pier foundation | |
| CN102864788A (en) | Method for underpinning reinforced bridge pile foundation by bear-type static pressure cluster pile | |
| CN102747735A (en) | Treatment method for abnormal deformation of deep foundation pit concrete support piling | |
| CN108999427B (en) | Support structure for moving load during building migration in place and construction method thereof | |
| CN202227360U (en) | Wide-span prestressed concrete pile beam plate structure used for grounds of buildings, workshops, etc. | |
| CN214459689U (en) | Cast-in-place box girder support of weak soil foundation | |
| CN110453609B (en) | Simple and convenient steel pipe pile support preloading structure and method | |
| CN112879026A (en) | Temporary backrest support structure for rectangular pipe jacking construction and construction method thereof | |
| CN211333866U (en) | High-speed railway beam-making pedestal suitable for unfavorable geology | |
| CN109083442B (en) | Construction method of dynamic load bearing structure during butt joint of existing building and newly-built foundation | |
| CN201671063U (en) | Movable steel base for construction precast beams and standard knot thereof | |
| US20220042273A1 (en) | Structural support and stabilization assemblies and methods for installing same | |
| CN108342984B (en) | Soft foundation trestle for mudflat and installation and sedimentation method thereof | |
| CN113669076A (en) | Construction method suitable for adjustable starting platform assembly of pipe jacking construction | |
| CN111186780A (en) | Movable arm type tower crane underframe weight type foundation and construction method | |
| RU2333322C1 (en) | Method for elevating and levelling buldings | |
| CN114837103B (en) | Double jacking and pushing installation method for steel box girder | |
| CN219527716U (en) | Pile foundation underpinning structure | |
| CN216615534U (en) | Portable transverse moving precast beam system | |
| CN217839744U (en) | Cast-in-place roof beam template of hyperbola fish belly formula supports pre-compaction structure | |
| CN219992170U (en) | Double-deck bridge device that falls that turns | |
| CN219753833U (en) | High-low staggered elevator shaft concrete bottom plate construction structure | |
| CN219653491U (en) | Steel construction abutment suitable for steel trestle | |
| CN217028157U (en) | Turnover assembly type base device for jacking steel net rack |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |