CN105544312B - The box-like composite foundation of reinforced concrete pile plain concrete pile partition group - Google Patents
The box-like composite foundation of reinforced concrete pile plain concrete pile partition group Download PDFInfo
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- CN105544312B CN105544312B CN201610064759.5A CN201610064759A CN105544312B CN 105544312 B CN105544312 B CN 105544312B CN 201610064759 A CN201610064759 A CN 201610064759A CN 105544312 B CN105544312 B CN 105544312B
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- concrete pile
- embankment
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- reinforced concrete
- pile
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B2/00—General structure of permanent way
- E01B2/006—Deep foundation of tracks
-
- 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
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- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a kind of box-like composite foundation of reinforced concrete pile plain concrete pile partition group, including outside stake and inner side stake, the region that the region of outside stake and inner side stake arrangement is covered by embankment, wherein, embankment includes the side slope of embankment of embankment top surface and embankment top surface both sides, to the distance of embankment cross-sectional width center line is A on embankment cross section, from the edge of side slope of embankment；The region of outside stake arrangement is to extend to the shared region in 1/5A to 3/4A places to embankment cross-sectional width center line from the side slope of embankment of both sides；Remaining region is the layout area of inner side stake；Outside stake uses reinforced concrete pile, and inner side stake uses plain concrete pile.Solve pile foundation on the outside of traditional Pure-Concrete-Pile Composite Subgrade and brittle fracture easily occurs under larger moment of flexure, there is brittle fracture successively so as to cause internal pile body, and then cause the engineering problem that destabilization, bearing capacity substantially reduce, clean steel reinforced concrete pile composite foundation cost is solved simultaneously higher, uneconomic problem.
Description
Technical field
The present invention relates to a kind of box-like composite foundation of partition group mixed using reinforced concrete pile and plain concrete pile, category
In civil engineering ground field.
Background technology
In recent years, with the fast development of the construction such as China Express Railway, construction speed and sedimentation control for embankment
System etc. proposes requirement higher.In China's Coastal Areas, topsoil is mostly saturated soft clay, the shearing of the soil body compared with
Low, drainability is poor, thus embankment is susceptible to unstable failure.To adapt to the requirement of Fast Construction and settlement Control, rigidity
Pile composite foundation has obtained increasingly being widely applied, and plain concrete pile has Compressive Bearing Capacity high, and elastic modelling quantity is big, cost phase
To cheap, the characteristics of speed of application is fast, but its anti-bending bearing capacity is relatively low, easily because tension surpasses under bending load effect
Cross its ultimate tensile stress and then produce brittle fracture, cause its rapid forfeiture bearing capacity, and then cause the unstable failure of embankment, steel
Rib concrete pile has anti-bending bearing capacity and ductility very high, when it because larger bending load causes tension to reach capacity drawing
During stress, plasticity can be entered and continue to carry, security is higher, but price is relatively expensive.
During embankment and use, with embankment constantly increase and embankment on load constantly increase, respectively
The stress of stake also constantly increases, wherein inner side stake is to bear based on vertical axle power, outside pile is relatively small by axle power, but it holds
By larger moment of flexure, under the collective effect of larger moment of flexure and smaller axle power, outside stake inboard portion is first close to its Ultimate Tensile
Intensity, and now the bearing capacity of inner side stake is not fully used, if outside stake reaches capacity tension because of tensile strength
There is the bending failure of fragility in intensity, after its destruction, internal force reduces rapidly, and the effect of contraction to the soil body weakens rapidly, the soil body
Motion causes the interaction for occurring with the internal soil body, causes its stress to increase and then the bending failure of fragility occurs, so past
Multiple, there is continuous bending failure successively in each stake, ultimately result in destabilization from the outside to the core, cause huge personnel, property loss.
In sum, how when rigid pile composite foundation is built, improve the ability of the continuous destruction of embankment resistance and control
It is made and originally become a problem demanding prompt solution.
The content of the invention
In order to overcome the shortcoming of above-mentioned prior art, the present invention to provide a kind of reinforced concrete pile-plain concrete pile subregion
Combined ground, its outside stake has anti-bending bearing capacity higher using reinforced concrete pile, can resist the first pile
The generation of fragility bending failure, its inner side stake uses the plain concrete pile of cost relative moderate, so as to not reduce security
In the case of meet the requirement of economy.
In order to solve the above-mentioned technical problem, a kind of reinforced concrete pile-plain concrete pile partition conbination proposed by the present invention
The region that the region of formula composite foundation, including outside stake and inner side stake, the outside stake and inner side stake arrangement is covered by embankment,
Wherein, the embankment includes the side slope of embankment of embankment top surface and embankment top surface both sides, on embankment cross section, from side slope of embankment
Edge to the distance of embankment cross-sectional width center line is A；The region of outside stake arrangement be from the side slope of embankment of both sides to
Embankment cross-sectional width center line extends to the shared region in 1/5A to 3/4A places；Remaining region is the arrangement area of inner side stake
Domain；The outside stake uses reinforced concrete pile, and the inner side stake uses plain concrete pile.
Further, reinforced concrete pile of the present invention-box-like composite foundation of plain concrete pile partition group, wherein, the steel
The stake footpath of rib concrete pile and the plain concrete pile is 300~800mm, between the reinforced concrete pile, the plain coagulation
Pilespacing between native stake and between the reinforced concrete pile and the plain concrete pile is 1.5~3m.
The stake top of all reinforced concrete piles and plain concrete pile is concordant with the upper surface of foundation soil, above the foundation soil
It is equipped with the thick mattress layers of 20~30cm.If being hard stratum below the foundation soil, all reinforced concrete piles and element are mixed
The bottom of solidifying soil stake is located at the top surface or embedded hard stratum of hard stratum.
Compared with prior art, the beneficial effects of the invention are as follows：
Composite foundation of the present invention solves pile foundation on the outside of traditional Pure-Concrete-Pile Composite Subgrade and is easily issued in larger moment of flexure
, there is brittle fracture successively so as to cause internal pile body, and then cause destabilization, bearing capacity to substantially reduce in raw brittle fracture
Engineering problem, while it is higher to solve clean steel reinforced concrete pile composite foundation cost, uneconomic problem.Because the present invention is compound
Outside stake in ground uses the reinforced concrete pile with anti-bending bearing capacity higher, can resist the first pile fragility curved
The generation of song destruction, thus, inner side stake need not possess anti-bending bearing capacity too high, so using the plain coagulation of cost relative moderate
Native stake can meet the requirement of economy in the case where security is not reduced.Composite foundation of the present invention is in the following model of side slope of embankment
Stake in enclosing is substantially to use reinforced concrete pile, and the stake in the following scope of embankment top surface is substantially to use plain concrete
Stake, the pilespacing between each stake is 1.5m to 3m, and each stake stake top is located at embankment bottom surface, if foundation region has hard stratum, each stake
Stake bottom can obtain preferable wedge action in being against hard stratum or embedded hard stratum.
Composite foundation of the present invention has the advantages that simple, safe, good economy performance of constructing.
Brief description of the drawings
Fig. 1 is the vertical cross section figure of composite foundation of the present invention；
Fig. 2 is the plan of composite foundation of the present invention；
In figure：1- embankments, 2- foundation soils, 3- hard stratums, 4- reinforced concrete piles, 5- plain concrete piles.
Specific embodiment
Technical solution of the present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings, described is specific
Embodiment is only explained to the present invention, is not intended to limit the invention.
As depicted in figs. 1 and 2, a kind of reinforced concrete pile-plain concrete pile partition group proposed by the present invention is box-like compound
The region that the region of ground, including outside stake and inner side stake, the outside stake and inner side stake arrangement is covered by embankment 1, wherein,
The embankment 1 includes the side slope of embankment of embankment top surface and embankment top surface both sides, on embankment cross section, from the edge of side slope of embankment
Distance to embankment cross-sectional width center line is A, and the region that the outside stake is arranged is the side slope of embankment from both sides to embankment
Cross-sectional width center line extends to the region shared by 1/5A (1/5th A) to 3/4A (3/4ths A) place；Remaining region
It is the layout area of inner side stake；The outside stake uses reinforced concrete pile 4, and the inner side stake uses plain concrete pile 5, reinforcing bar
Concrete-pile 4 has ductility and anti-bending bearing capacity very high, and plain concrete pile 5 has rigidity and vertical bearing capacity higher,
The domatic following position of embankment sets reinforced concrete pile 4, and remaining position below embankment sets plain concrete pile 5, can be compared with
The generation of continuous destruction is resisted well, the bearing capacity of embankment is improve, and saves certain engineering cost, with preferable
Economy
The stake footpath of the reinforced concrete pile 4 and the plain concrete pile 5 is 300~800mm, the reinforced concrete pile
Pilespacing between 4, between the plain concrete pile 5 and between the reinforced concrete pile 4 and the plain concrete pile 5 is
1.5~3m.The stake top of all reinforced concrete piles 4 and plain concrete pile 5 is concordant with the upper surface of foundation soil 2, the foundation soil 2
The thick mattress layers of 20~30cm are equipped with above.If below the foundation soil 2 being hard stratum 3, all reinforced concrete piles 4
With the top surface or embedded hard stratum 3 that the bottom of plain concrete pile 5 is located at hard stratum 3.
Reinforced concrete pile on the outside of composite foundation of the present invention has anti-bending bearing capacity very high, and is reached capacity at it
There is ductility very high, after plasticity is entered, brittle fracture will not occur also will not suddenly lose bending resistance and vertical after stretching strain
Bearing capacity, substantially increase the anti-bending bearing capacity and security of outside pile body, it is to avoid caused by because of local pile body bending failure
Each stake is continuously destroyed, and effectively improves the ability of the continuous destruction of composite foundation resistance, greatly improves the security of embankment, meanwhile,
Pile body on the inside of embankment bear moment of flexure it is smaller, to bear based on vertical axle power, use the relatively cheap element of cost at the position
Concrete-pile, it has Compressive Bearing Capacity and elastic modelling quantity very high, can effectively undertake vertical load, the vertical change of control
Shape, thus can on the basis of Embankment Subsidence is controlled effectively saving construction cost.
Although above in conjunction with figure, invention has been described, the invention is not limited in above-mentioned specific embodiment party
Formula, above-mentioned specific embodiment is only schematical, and rather than restricted, one of ordinary skill in the art is in this hair
Under bright enlightenment, without deviating from the spirit of the invention, many variations can also be made, these belong to guarantor of the invention
Within shield.
Claims (4)
1. a kind of stake of reinforced concrete pile-box-like composite foundation of plain concrete pile partition group, including outside and inner side stake, it is described outer
The region that the region of side stake and inner side stake arrangement is covered by embankment (1), wherein, the embankment (1) includes embankment top surface and road
The side slope of embankment of levee crown face both sides, on embankment cross section, from the edge of side slope of embankment to embankment cross-sectional width center line
Distance is A, it is characterised in that：
The region of the outside stake arrangement is to extend to 1/5A extremely to embankment cross-sectional width center line from the side slope of embankment of both sides
Shared region at 3/4A；Remaining region is the layout area of inner side stake；The outside stake uses reinforced concrete pile (4),
The inner side stake is using plain concrete pile (5).
2. reinforced concrete pile-box-like composite foundation of plain concrete pile partition group according to claim 1, it is characterised in that：
The stake footpath of the reinforced concrete pile (4) and the plain concrete pile (5) is 300~800mm, the reinforced concrete pile (4)
Between, between the plain concrete pile (5) and the pilespacing between the reinforced concrete pile (4) and the plain concrete pile (5)
It is 1.5~3m.
3. reinforced concrete pile-box-like composite foundation of plain concrete pile partition group according to claim 1, it is characterised in that：
The stake top of all reinforced concrete piles (4) and plain concrete pile (5) is concordant with the upper surface of foundation soil (2), the foundation soil (2)
The thick mattress layers of 20~30cm are equipped with above.
4. reinforced concrete pile-box-like composite foundation of plain concrete pile partition group according to claim 3, it is characterised in that：
It is hard stratum (3) below the foundation soil (2), the bottom of all reinforced concrete piles (4) and plain concrete pile (5) is located at pan soil
The top surface of layer (3) or embedded hard stratum (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610064759.5A CN105544312B (en) | 2016-01-29 | 2016-01-29 | The box-like composite foundation of reinforced concrete pile plain concrete pile partition group |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610064759.5A CN105544312B (en) | 2016-01-29 | 2016-01-29 | The box-like composite foundation of reinforced concrete pile plain concrete pile partition group |
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| Publication Number | Publication Date |
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| CN105544312A CN105544312A (en) | 2016-05-04 |
| CN105544312B true CN105544312B (en) | 2017-06-06 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106758624A (en) * | 2016-12-27 | 2017-05-31 | 天津大学 | The box-like composite foundation of reinforced concrete pile cement earth pile partition group |
| CN106759394A (en) * | 2016-12-27 | 2017-05-31 | 天津大学 | The box-like composite foundation of composite pile cement earth pile partition group |
Citations (5)
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| CN102400469A (en) * | 2011-08-02 | 2012-04-04 | 北京健安诚岩土工程有限公司 | Secant pile drum type foundation and construction method thereof |
| CN102561384A (en) * | 2012-01-31 | 2012-07-11 | 中天建设集团有限公司天津分公司 | Steel hoop truss type elevated pile cap tower crane foundation construction method and structure |
| DE102012201281A1 (en) * | 2011-02-08 | 2012-08-09 | Otto Drexler | Reinforced concrete foundation pile structure used for roof, bridge or wall construction of gas station for e.g. electric vehicle, has reinforced concrete pile portions and spacing pile that are formed as three-pronged pile system |
| CN103726673A (en) * | 2014-01-27 | 2014-04-16 | 龚金京 | Novel after-rooting composite pile foundation |
| CN205347889U (en) * | 2016-01-29 | 2016-06-29 | 天津大学 | Concrete pile - plain concrete stake partition conbination formula composite foundation |
-
2016
- 2016-01-29 CN CN201610064759.5A patent/CN105544312B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012201281A1 (en) * | 2011-02-08 | 2012-08-09 | Otto Drexler | Reinforced concrete foundation pile structure used for roof, bridge or wall construction of gas station for e.g. electric vehicle, has reinforced concrete pile portions and spacing pile that are formed as three-pronged pile system |
| CN102400469A (en) * | 2011-08-02 | 2012-04-04 | 北京健安诚岩土工程有限公司 | Secant pile drum type foundation and construction method thereof |
| CN102561384A (en) * | 2012-01-31 | 2012-07-11 | 中天建设集团有限公司天津分公司 | Steel hoop truss type elevated pile cap tower crane foundation construction method and structure |
| CN103726673A (en) * | 2014-01-27 | 2014-04-16 | 龚金京 | Novel after-rooting composite pile foundation |
| CN205347889U (en) * | 2016-01-29 | 2016-06-29 | 天津大学 | Concrete pile - plain concrete stake partition conbination formula composite foundation |
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| CN105544312A (en) | 2016-05-04 |
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Address after: 300350 District, Jinnan District, Tianjin Haihe Education Park, 135 beautiful road, Beiyang campus of Tianjin University Patentee after: Tianjin University Address before: 300072 Tianjin City, Nankai District Wei Jin Road No. 92 Patentee before: Tianjin University |