CN102587402A - Sparse pile foundation of building composite foundation - Google Patents
Sparse pile foundation of building composite foundation Download PDFInfo
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- CN102587402A CN102587402A CN2012100285844A CN201210028584A CN102587402A CN 102587402 A CN102587402 A CN 102587402A CN 2012100285844 A CN2012100285844 A CN 2012100285844A CN 201210028584 A CN201210028584 A CN 201210028584A CN 102587402 A CN102587402 A CN 102587402A
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Abstract
The invention discloses a sparse pile foundation of a building composite foundation, which comprises a composite foundation, a cushion layer arranged at the upper part of the composite foundation, and reinforced concrete piles and compressible pile top connecting pieces which are arranged in interior of the composite foundation, wherein the composite foundation is formed in a way that plain concrete piles are added in a natural foundation, the pile distance among the reinforced concrete piles is not less than 6 times as the diameter of a pile, and the reinforced concrete piles and the bottom surface of a building foundation are connected by rebar or CFRP (carbon fiber reinforced plastic) ribs which penetrate through the pile top connecting pieces. The building composite foundation has the beneficial effects that respective bearing performance advantages of the composite foundation and the sparse pile foundation can be given fully play, so that a building does not incline excessively under an earthquake action and horizontal load actions such as wind load and the like so as to avoid damage of the composite foundation, and ensure the safety of the building; in addition, compared with the pile foundation in the prior art, the sparse pile foundation provided by the invention has fewer reinforced concrete piles, is convenient for construction, and has huge economic benefits and wide application prospect.
Description
Technical field
The present invention relates to structure foundation basic technology field.
Background technology
Composite foundation is meant that natural ground part soil body in the ground processing procedure is enhanced; Or replaced; Or reinforcement material is set in natural ground; Stabilization zone is by matrix (the natural ground soil body or the modified natural ground soil body) and strengthens body artificial foundation dimerous that under load action, matrix and enhancing body are born the effect of load jointly.Thin pile foundation is a kind of composite pile foundation that STRUCTURES CONSIDERING PILE and basis end ground are born the superstructure load jointly, compares with the conventional piles basis, and it is less to dredge pile foundation stake number, and pile spacing is bigger.Under the prerequisite that bearing capacity of foundation soil meets the demands, thin pile foundation often designs according to the settlement request of building, forms by the superstructure deformation requirements to confirm the composite pile foundation with stake quantity.
At present; Composite foundation is because of its easy construction and cheap being widely used in the processing of high-rise building ground; The Bearing Capacity of Composite Foundation characteristic value has particularly also obtained extensive application by bringing up to about 600kPa about original 200kPa in the highrise building more than 30 layers.For the situation that underground garage is arranged around highrise building more than 30 layers and the building; Even composite foundation its bearing capacity under the static load condition can meet design requirement; But under horizontal loads such as geological process and wind load, the building foundation receives eccentric load, and the composite foundation pile body of basic limit portion is prone to produce fracture; Cause composite foundation to destroy building collapsing.
Dredge pile foundation and link to each other with the basis, and be furnished with reinforcing bar in the pile body, can resist the horizontal loads that building receives effectively because of its top, but because of the negligible amounts that lays out pile under its basis, so natural foundation bearing capacity can meet design requirement basically under the requirement basis.When the base pressure of building during much larger than natural foundation bearing capacity, its application can be restricted.
Summary of the invention
The purpose that the present invention will solve provides a kind of building composite foundation and dredges pile foundation, and composite foundation and thin pile foundation advantage separately can be given full play in this basis, and load-carrying properties are scientific and reasonable, under horizontal loads, can improve the safety of building greatly; Cost is lower, remarkable in economical benefits.
For solving the problems of the technologies described above; The technical scheme that the present invention taked is: a kind of building composite foundation is dredged pile foundation; Be included in composite foundation, the mattress layer that is positioned at composite foundation top that adds plain concrete pile in the natural ground, reinforced concrete pile and the compressibility stake roof connecting that is positioned at composite foundation inside, the pilespacing of said reinforced concrete pile is not less than 6 times stake footpath; Be fixedly connected through reinforcing bar or the CFRP muscle that passes said stake roof connecting between said reinforced concrete pile and the bottom surface, building foundation.
Said compressibility stake roof connecting is the sulphide mastic connector, and it is shaped as cylindrical, and the diameter of its cross section is not less than 1/4th of said reinforced concrete pile diameter.The performance that the vertical rigidity of stake roof connecting is dredged the pile foundation bearing capacity to composite foundation plays a crucial role; The pile body moment of flexure plays a crucial role the horizontal rigidity of connector in the following certain limit in stake stake top to dredging; Rationally set connector rigidity and not only can bring into play the bearing capacity of dredging pile foundation effectively, can also reduce the geological process that reinforced concrete pile receives.
Principle of the present invention is following: under vertical uniform load q, connector and mattress layer are compressed by load action jointly, and reinforced concrete pile uses as the foundation pile of composite foundation, and this stage mainly is that composite foundation works; When connector was compressed to the predetermined design distortion, connector no longer produced new compressive strain, the common sedimentation in reinforced concrete pile and building foundation, and this stage is that thin pile foundation and composite foundation concur.Composite foundation is dredged pile foundation and is in composite foundation work during the stage, because the compression of reinforced concrete pile stake roof connecting and mattress layer be to the corrective action of pile-soil stress, Bearing Capacity of Composite Foundation can be able to performance by predetermined design; When the distortion of reinforced concrete pile stake roof connecting reaches preset deformation values and requires; Composite foundation is dredged pile foundation and is in composite foundation and thin pile foundation co-operation stage; This moment, the composite pile foundation bearing capacity can meet design requirement, and the sedimentation and deformation of thin pile foundation can satisfy the designing requirement of superstructure.
Under horizontal loads; Composite foundation is dredged pile foundation and is in composite foundation and thin pile foundation co-operation stage; Because reinforced concrete pile stake top links to each other with the building foundation, reinforced concrete pile produces vertical drawknot to the building foundation, prevents that the building foundation from producing excessive toppling; Avoid the local compressive stress of composite foundation excessive and destroyed, guarantee building safety.
Beneficial effect of the present invention is following: the present invention is through adding the thin pile foundation of reinforced concrete pile in the conventional composite ground; Constitute composite foundation and dredge pile foundation; Can give full play to the load-carrying properties advantage of composite foundation and thin pile foundation, make building under horizontal loads such as geological process and wind load, excessive inclination does not take place; Avoid composite foundation to be damaged, guarantee building safety; Cost performance is high; The present invention compares with traditional pile foundation in addition, and the quantity of reinforced concrete pile is few, and easy construction has huge economic benefit and application prospects.
Description of drawings
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is done further detailed explanation.
Fig. 1 is the structural representation that composite foundation of the present invention is dredged pile foundation;
Fig. 2 is the cross sectional representation of reinforced concrete pile roof connecting;
Wherein, 1, plain concrete pile, 2, reinforced concrete pile, 3, mattress layer, 4, the stake roof connecting, 5, the building foundation, 6, inter-pile soil, 7, CFRP muscle.
The specific embodiment
As depicted in figs. 1 and 2, building composite foundation of the present invention is dredged pile foundation, in natural ground, adds plain concrete pile 1 and forms composite foundation; At the inner cloth reinforced concrete pile 2 of dredging of composite foundation, pile spacing is not less than 6 times of stake footpaths, forms and dredges pile foundation; Dredge pile foundation top at composite foundation and lay the graded sand and stone formation mattress layer 3 that one deck particle diameter is 5-10mm, adjustment stake soil pressure and sedimentation make a soil bear vertical load jointly; Building foundation 5 is positioned at mattress layer 3 tops; Between reinforced concrete pile 2 and 5 bottom surfaces, building foundation, a roof connecting 4 is set; For guaranteeing the overturning or slip resistance analysis requirement; And make a roof connecting 4 and mattress layer 3 common compression under vertical load; CFRP muscle 7 is set in stake roof connecting 4, CFRP muscle 7 respectively with reinforced concrete pile 2 and building foundation 5 bottom anchor, guarantee that under horizontal loading thin pile foundation produces vertical drawknot to building.Stake roof connecting 4 adopts the sulphide mastic material to process, and its diameter is not less than 1/4th of reinforced concrete pile 2 diameters.
At the superstructure load action initial stage, stake roof connecting 4 is with mattress layer 3 compressions, and load is born by plain concrete pile 1, reinforced concrete pile 2 and inter-pile soil 6 jointly, is equivalent to traditional composite foundation.After load reached the Bearing Capacity of Composite Foundation predetermined design, stake roof connecting 4 stopped compression, and reinforced concrete pile 4 links to each other with building foundation 5, and composite foundation is dredged pile foundation formation and started working.Composite foundation is dredged the requirement that pile foundation can satisfy superstructure vertical load and horizontal loading, compares with the conventional piles basis, and reinforced concrete pile is few with stake quantity, easy construction, and economic results in society are remarkable.
The foregoing description only belongs to a kind of embodiment of the present invention, and wherein the structure of each parts, connected mode etc. can change to some extent, and every equivalents of on the basis of technical scheme of the present invention, carrying out and improvement are all within protection scope of the present invention.
Claims (2)
1. a building composite foundation is dredged pile foundation; It is characterized in that; Be included in composite foundation, the mattress layer that is positioned at composite foundation top that adds plain concrete pile in the natural ground, reinforced concrete pile and the compressibility stake roof connecting that is positioned at composite foundation inside, the pilespacing of said reinforced concrete pile is not less than 6 times stake footpath; Be fixedly connected through reinforcing bar or the CFRP muscle that passes said stake roof connecting between said reinforced concrete pile and the bottom surface, building foundation.
2. a kind of building composite foundation according to claim 1 is dredged pile foundation; It is characterized in that; Said compressibility stake roof connecting is the sulphide mastic connector, and it is shaped as cylindrical, and the diameter of its cross section is not less than 1/4th of said reinforced concrete pile diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100285844A CN102587402A (en) | 2012-02-09 | 2012-02-09 | Sparse pile foundation of building composite foundation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100285844A CN102587402A (en) | 2012-02-09 | 2012-02-09 | Sparse pile foundation of building composite foundation |
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| CN102587402A true CN102587402A (en) | 2012-07-18 |
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| CN2012100285844A Pending CN102587402A (en) | 2012-02-09 | 2012-02-09 | Sparse pile foundation of building composite foundation |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106337430A (en) * | 2016-09-05 | 2017-01-18 | 中交四航局第二工程有限公司 | Underwater composite foundation reinforcement treatment method |
| 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 |
| CN110130384A (en) * | 2019-05-10 | 2019-08-16 | 中国建筑西南勘察设计研究院有限公司 | Existing super high-rise building scattering pile reinforcement means |
| CN110144922A (en) * | 2019-05-10 | 2019-08-20 | 中国建筑西南勘察设计研究院有限公司 | Existing super high-rise building dredges pile composite foundation reinforcing method |
| CN115012400A (en) * | 2022-06-01 | 2022-09-06 | 辽宁工程技术大学 | Foundation reinforcement method for CFG pile dislocation |
| CN115450244A (en) * | 2022-08-30 | 2022-12-09 | 安徽工业大学 | Novel composite pile bridge anti-seismic foundation for soft soil area and construction method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106337430A (en) * | 2016-09-05 | 2017-01-18 | 中交四航局第二工程有限公司 | Underwater composite foundation reinforcement treatment method |
| CN106337430B (en) * | 2016-09-05 | 2018-09-04 | 中交四航局第二工程有限公司 | A kind of underwater composite foundation stabilization treatment method |
| 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 |
| CN110130384A (en) * | 2019-05-10 | 2019-08-16 | 中国建筑西南勘察设计研究院有限公司 | Existing super high-rise building scattering pile reinforcement means |
| CN110144922A (en) * | 2019-05-10 | 2019-08-20 | 中国建筑西南勘察设计研究院有限公司 | Existing super high-rise building dredges pile composite foundation reinforcing method |
| CN115012400A (en) * | 2022-06-01 | 2022-09-06 | 辽宁工程技术大学 | Foundation reinforcement method for CFG pile dislocation |
| CN115450244A (en) * | 2022-08-30 | 2022-12-09 | 安徽工业大学 | Novel composite pile bridge anti-seismic foundation for soft soil area and construction method thereof |
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Application publication date: 20120718 |