CN103046532A - Variable stiffness leveling prestressed pipe pile compound foundation - Google Patents
Variable stiffness leveling prestressed pipe pile compound foundation Download PDFInfo
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- CN103046532A CN103046532A CN2012105899626A CN201210589962A CN103046532A CN 103046532 A CN103046532 A CN 103046532A CN 2012105899626 A CN2012105899626 A CN 2012105899626A CN 201210589962 A CN201210589962 A CN 201210589962A CN 103046532 A CN103046532 A CN 103046532A
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Abstract
Disclosed is a variable stiffness leveling prestressed pipe pile compound foundation. Prestressed pipe piles different in length and spacing are respectively disposed according to different stiffnesses of construction area foundations. If the foundation stiffness is large, the spacing of the prestressed pipe piles is larger and the length of pile bodies is small. If the foundation stiffness is small, the spacing of the prestressed pipe piles is small and the length of the pile bodies is large, and a gravel cushion is arranged above the prestressed pipe piles. Different characteristics of the foundation stiffness are fully considered, bearing capacity of pile adjacent soil is given to full play, foundation deformation can also be well coordinated, and nonuniform foundation settlement in the late stage of project can be prevented effectively.
Description
Affiliated technical field
The present invention relates to a kind of the realm of building construction prestressed tubular pile composite foundation, specifically a kind of variable-stiffness leveling type prestressed tubular pile composite foundation.
Background technology
Be the raising bearing capacity of foundation soil, accelerating construction progress, prestressed concrete pipe pile is widely applied in engineering construction in recent years, but all is as pile foundation.The prestressed concrete pipe pile composite foundation can be given full play to the load-carrying properties of stake and inter-pile soil, effectively improves the foundation soil stress, improves bearing capacity of foundation soil, can reduce well again the distortion of ground.Currently used prestressed tubular pile composite foundation mostly be in the reinforcing area maximum load as design load, isometric, isometrical, equidistant design, the prestressed pipe pile length of design is all longer, and pile spacing is also less, and for considering the rigidity inhomogeneities of ground self.The composite foundation that designs by unified highest standard is in conservative, not only can cause the part stake long long for invalid stake, also increase simultaneously the originally inhomogeneities of inhomogeneous ground, in addition, too small pile spacing has also increased construction costs and difficulty of construction, has increased simultaneously the engineering unsafe factor.So both do not maximally utilised the natural ground inherent advantages, wasted the more resources of production, increased greatly again the technical difficulty of construction, and be unfavorable for reduce project cost and create conservation-minded society.
Summary of the invention
In order to solve the problem that prestressed tubular pile composite foundation exists in the existing building construction field, the invention provides a kind of variable-stiffness leveling type prestressed tubular pile composite foundation, this composite foundation can not only solve Lack of support and the uneven subsidence of ground, and can give full play to the intrinsic bearing capacity of natural ground, reduced raw-material use.
The technical solution adopted for the present invention to solve the technical problems: above pile for prestressed pipe, be provided with the broken stone cushion layer, and according to the difference of construction area foundation stiffness, set prestressed pipe pile length is all different with spacing, the large prestressed pipe pile spacing that then arranges of foundation stiffness is large and pile body length is shorter, and the little prestressed pipe pile spacing that then arranges of foundation stiffness is little and pile body length is longer.Take full advantage of the intrinsic load-carrying properties of natural ground, greatly saved the material usages such as reinforcing bar and concrete, thereby effectively reduced the construction period construction costs.
The invention has the beneficial effects as follows: can not only effectively solve the uneven subsidence in engineering foundation later stage, and distributing position and prestressed pipe pile length by pile for prestressed pipe rationally is set, so that the intrinsic bearing capacity of natural ground is effectively used, thereby reduced the consumption of the materials such as reinforcing bar and concrete, reduced construction period and construction costs, product structure is simple, and cost is low, easy construction is easily promoted the use of.
Description of drawings
The invention will be further described below in conjunction with accompanying drawing.
Fig. 1 is plane structure schematic diagram of the present invention.
Fig. 2 is A-A cross-sectional view among Fig. 1.
Fig. 3 is the second embodiment of the present invention.
Code description among the figure: 1-pile for prestressed pipe; The 2-pile for prestressed pipe; The 3-pile for prestressed pipe; 4-broken stone cushion layer; The Soft Soil Layer that 5-rigidity is lower; The incompetent bed that 6-rigidity is higher; 7-foundation stiffness change curve; The zone that 11-rigidity is lower; The zone that 22-rigidity is general; The zone that 33-rigidity is higher.
The specific embodiment
As shown in Figure 1 and Figure 2, the thick broken stone cushion layer (4) of 20 ~ 30cm is set above pile for prestressed pipe.Spacing at the lower zone of rigidity (11) pile for prestressed pipe (1) is less, length is longer, the quantity of the less then pile for prestressed pipe of spacing is also just more, long stake is long can guarantee that then pile for prestressed pipe gos deep into bearing stratum, obtains enough support forces, thus so that foundation stiffness reinforcement that should the zone.And in the more general zone of rigidity (22), spacing and the length of set pile for prestressed pipe (2) are all more moderate.In the higher zone of rigidity (33), the bearing capacity intrinsic owing to this zone natural ground is higher, therefore the spacing of set pile for prestressed pipe (3) is larger, stake is long then shorter, namely take full advantage of the intrinsic bearing capacity of this zone ground, reduced again density and length that pile for prestressed pipe arranges, effectively avoided invalid stake long, saved a large amount of raw material, simultaneously also so that construction period greatly shorten.When satisfying the loading capacity of engineering requirement, also avoided the differential settlement in engineering later stage.
In Practical Project, because the inhomogeneities of foundation soil, foundation stiffness change curve (5) as shown in Figure 3 can appear, this moment, spacing and the length of each regional pile for prestressed pipe all should arrange according to the designing requirement of building engineering, satisfied the demand of superstructure to guarantee bearing capacity of foundation soil and rigidity.
Claims (3)
1. variable-stiffness leveling type prestressed tubular pile composite foundation, it is to be provided with rubble cotton-padded mattress layer above pile for prestressed pipe, it is characterized in that: according to the difference of construction area foundation stiffness, set prestressed pipe pile length is all different with spacing.
2. variable-stiffness leveling type prestressed tubular pile composite foundation according to claim 1 is characterized in that: the prestressed pipe pile spacing that foundation stiffness greatly then arranges is large and pile body length is shorter.
3. variable-stiffness leveling type prestressed tubular pile composite foundation according to claim 1 is characterized in that: the little prestressed pipe pile spacing that then arranges of foundation stiffness is little and pile body length is longer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105899626A CN103046532A (en) | 2012-12-31 | 2012-12-31 | Variable stiffness leveling prestressed pipe pile compound foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105899626A CN103046532A (en) | 2012-12-31 | 2012-12-31 | Variable stiffness leveling prestressed pipe pile compound foundation |
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| CN103046532A true CN103046532A (en) | 2013-04-17 |
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| CN2012105899626A Pending CN103046532A (en) | 2012-12-31 | 2012-12-31 | Variable stiffness leveling prestressed pipe pile compound foundation |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107808026A (en) * | 2017-09-14 | 2018-03-16 | 南京瑞迪建设科技有限公司 | A kind of storage tank composite foundation variable-stiffness leveling Optimization Design |
| CN108775006A (en) * | 2018-06-09 | 2018-11-09 | 广东博意建筑设计院有限公司 | Pipe pile composite foundation |
| CN110952389A (en) * | 2019-12-17 | 2020-04-03 | 同济大学 | Pile combined structure construction method for controlling uneven settlement of transition section of high-speed railway bridge |
| CN116427417A (en) * | 2023-03-15 | 2023-07-14 | 广州万构建筑工程设计有限公司 | Construction method and system for controlling disturbance of existing adjacent pipelines in foundation pit excavation |
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| JP2000001862A (en) * | 1998-06-16 | 2000-01-07 | Penta Ocean Constr Co Ltd | Foundation structure |
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| CN102704462A (en) * | 2012-06-28 | 2012-10-03 | 中铁十六局集团第五工程有限公司 | Composite treatment grouped piles for soft foundation |
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Patent Citations (8)
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| JP2000001862A (en) * | 1998-06-16 | 2000-01-07 | Penta Ocean Constr Co Ltd | Foundation structure |
| JP2006045793A (en) * | 2004-07-30 | 2006-02-16 | Sekkeishitsu Soil:Kk | Structure of foundation |
| CN1876970A (en) * | 2005-06-10 | 2006-12-13 | 李仁平 | Long and short piles square units combination type combined pile foundation |
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| CN102296508A (en) * | 2011-06-20 | 2011-12-28 | 江苏省交通科学研究院股份有限公司 | Variable-stiffness composite foundation for highway |
| CN102493473A (en) * | 2011-12-13 | 2012-06-13 | 中国建筑西南勘察设计研究院有限公司 | Replacement composite foundation for shallow-layer jet-grouting reinforced piles and deep-layer plain concrete piles |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107808026A (en) * | 2017-09-14 | 2018-03-16 | 南京瑞迪建设科技有限公司 | A kind of storage tank composite foundation variable-stiffness leveling Optimization Design |
| CN108775006A (en) * | 2018-06-09 | 2018-11-09 | 广东博意建筑设计院有限公司 | Pipe pile composite foundation |
| CN110952389A (en) * | 2019-12-17 | 2020-04-03 | 同济大学 | Pile combined structure construction method for controlling uneven settlement of transition section of high-speed railway bridge |
| CN116427417A (en) * | 2023-03-15 | 2023-07-14 | 广州万构建筑工程设计有限公司 | Construction method and system for controlling disturbance of existing adjacent pipelines in foundation pit excavation |
| CN116427417B (en) * | 2023-03-15 | 2024-04-26 | 浙江聚贤建设股份有限公司 | Construction method and system for controlling disturbance of existing adjacent pipelines in foundation pit excavation |
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Application publication date: 20130417 |