CN101191327B - Hoop for pile head and pile with hoop - Google Patents
Hoop for pile head and pile with hoop Download PDFInfo
- Publication number
- CN101191327B CN101191327B CN2007101609661A CN200710160966A CN101191327B CN 101191327 B CN101191327 B CN 101191327B CN 2007101609661 A CN2007101609661 A CN 2007101609661A CN 200710160966 A CN200710160966 A CN 200710160966A CN 101191327 B CN101191327 B CN 101191327B
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- China
- Prior art keywords
- hoop
- pile
- stake
- strap
- foundation
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- Expired - Fee Related
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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
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a method for treating groundsill in which a hoop is used with a pile. The method adopts the arrangement of a closed ring-shaped hoop in certain range of height on the side surface of a pile head. The inside diameter of the hoop is greater than the outside diameter of the pile head, and the hoop and the pile are separated. The hoop of the pile and the pile head work together through the transfer force of the subsoil and a cushion to form a pile provided with a hoop. Because the hoop and the pile of the invention are closely linked, the invention is named 'a hoop on a pile head and a pile provided with a hoop', wherein, the hoop can be used with a pile foundation and composite foundations reinforced in vertical direction of various types.
Description
Affiliated technical field
The invention belongs to a kind of method that construction project field ground is handled, hoop collaborative work, hoop and a method for processing foundation that is used of particularly a kind of stake and pile crown.
Background technology
With method of the present invention more approaching following four class technology are arranged:
The one, the various pile covers that prevent the pile crown damage that only in the work progress of stake, use, pile cover the most important thing is and can equably pass to pile body on by hammer or large hydraulic mechanism energy, the dolly that vibrationproof hardwood pad or manila rope are formed is set between pile cover and pile crown and pile monkey and pile cover usually, to absorb bigger direct impact force or pressure, the comparatively novel unique technique of some of them has also been declared patent, as " large-sized prestress bidirectional combination type disk spring pile cover " (90208833.5), " compound pile cover " (200520025045.0) etc.
The 2nd, the cushion cap of stake, the cushion cap that a common post is one, also be referred to as pile cover, CFG pile composite foundation in the subgrade construction, PHC pile composite foundation generally all are added with the pile cover that is similar to small-sized cushion cap on the stake top, these cushion caps or pile cover are generally cast-in-place steel concrete, fuse at textural cushion cap or pile cover and stake.
The 3rd, hoop pedosphere and the ground hoop foundation structure mentioned respectively in Chinese invention patent " enclosing treatment of soft-earth fundation for buildings and structures " (88101349.8) and " saft soil stratum high-rise building cylindrical prestressed ground hoop foundation structure " (01126418.7)." enclosing treatment of soft-earth fundation for buildings and structures " is that a circumferential band pedosphere is set around ground, the hoop pedosphere also can be provided with the native inner ring of hoop with interior ground, the height of hoop pedosphere can be determined according to geological conditions and foundation load, the hoop pedosphere can steel concrete or steel plate site preparation, also can manufacture the preformed pile system of enclosing of being driven underground and form." saft soil stratum high-rise building cylindrical prestressed ground hoop foundation structure " is around highrise building, rammer buries the cylindrical prestressed ground hoop that single or multiple lift is made with anti-corrosion and high strength material or reinforced concrete, junction and the terrace of reinforcing underground foundation and superstructure extremely bind round, and the soil wriggling and the distortion that are subjected to the high-rise building gravity effect mainly are limited at wherein.These two kinds of methods all are that the periphery at building lot is provided with hoop pedosphere or cylindrical prestressed ground hoop, and the diaphragm wall that is equivalent to seal then is equivalent to a kind of shaped pile that can bring into play bearing capacity of foundation slab at the hoop pedosphere with the hoop soil inner ring of interior setting.
Four is exactly the stake of various common not straps.
Stake is the general designation of various vertical enhancing bodies, and bearing vertical load is the advantage of stake, and the weakness of stake is to bear a little less than the ability of horizontal loading.Horizontal loading mainly occurs in the top of stake, and pile crown is in the link position of ground and superstructure, its stress is the most complicated, the stressed maximum of the pile head of some type, the construction quality of pile crown is required also the highest, therefore, be necessary to strengthen research pile crown, particularly technological innovation improves the stress and the stress condition of pile crown by new measure.
Summary of the invention
The certain altitude scope is provided with an a kind of hoop of closed annular hoop and the method for processing foundation that stake is used about the present invention proposes the pile crown side, the internal diameter of hoop is greater than the external diameter of pile crown, hoop is what to separate with stake, stake and the hoop of pile crown come collaborative work by the power transmission of inter-pile soil and bed course, are combined into the stake of strap.King-pile of the present invention is inseparable with hoop, so the title of invention is decided to be " stake of the hoop of pile crown and strap ".
Hoop is closed annular, and its section form can be rectangle, triangle, " T " font or " L " font, circle etc. according to requirement of engineering.According to present technology, make the first-selected concrete of material of hoop, can be prefabricated, also can be cast-in-place, and according to stressed and structure situation configuration reinforcement.Prefabricated hoop can dissolve some flyash isoreactivity materials or rubbish the like waste, with the technology type of making precast concrete pile, brick made from waste seemingly, only need to change a template and just can be mass-produced, cost is very low.The cross sectional shape, external diameter, internal diameter of hoop, highly, the degree of depth of work progress, embedding inter-pile soil, situations such as situation that periphery is provided with bed course take different processing methods according to engineering is actual, coordinate mutually with effect, type, rigidity, pile spacing, the inter-pile soil character of stake.For guarantee hoop with between can collaborative work, between need making stake and binding round a relative displacement deformation is arranged, the stake top of the stake of strap is provided with little mattress layer of decrement or big flexible cushion or the reservation settlement space of decrement, make stake with respect to hoop generation displacement upwards, hoop arrives pile body by compression inter-pile soil and bed course with Load Transfer.If extremely do not need hoop to transmit horizontal loading to the stake top, also can place big padded coaming reservation hoop of decrement and the relative horizontal movement space between inter-pile soil and the pile crown, reduce the vertical load that the stake top is directly born but this moment the flexible cushion or the headspace of enough height need be set simultaneously also on the stake top at hoop and pile crown side certain altitude scope.For the pile foundation that has cushion cap, hoop stretches into cushion cap inside, and the reinforcing bar of cushion cap and the reinforcing bar of hoop interconnect, and horizontal loading is mainly born by hoop.The main effect of hoop can be summarized as follows:
1, Gu setting has increased a beaer near making pile crown, shares a part of load, and the stress that has reduced pile crown is concentrated.
2, hoop is with stake, inter-pile soil shares horizontal loading jointly, particularly shares the horizontal loading that major part need be born by pile crown originally, overcome the shortcoming a little less than vertical enhancing body is born the ability of horizontal loading.For pile foundation, the lateral rigidity of hoop is big more a lot of than stake, can bear most horizontal loading, and stake is in the neutral point place of the stake of strap, and concrete pile can reduce quantity of reinforcement, even can adopt the plain concrete pile that is unworthy of reinforcing bar.
3, hoop is born the part vertical load, and with vertical load by the effect of contraction of inter-pile soil and bed course is delivered to the side of stake gradually with the form of negative friction, in the certain depth scope, increase constraint simultaneously to the stake side.Like this, concerning pile crown, reduced the main stress bar of vertical direction, increased the stress of two other direction, the corresponding intensity that has improved material limits destruction; Below pile crown, the pile body in certain zone, not only increased the constraint of side, and because sharing and the power transmission effect of hoop reduced the peaked peak value of positive and negative frictional resistance neutral point place pile body axle power.In addition, hoop retrains the lateral expansion that flexible pile takes place in the scope of stake top, can reduce the sedimentation and deformation of ground significantly, improves the supporting capacity of flexible pile composite foundation.
Description of drawings
Description of drawings of the present invention is as follows: Fig. 1 is the schematic cross-sectional view of ground, has only marked stake (1) and hoop (2).
Fig. 2 and Fig. 3 are respectively the profile construction schematic diagram of typical rigid pile composite foundation and pile foundation.The section form of hoop (2) is a rectangle in the example.
Detailed description of main elements is as follows: 1, stake 2, hoop 3, superstructure 4, bed course 5, reservation headroom 6, pile cap
The specific embodiment
Embodiment 1 (rigid pile composite foundation): referring to accompanying drawing 2
Embodiment 2 (pile foundation): referring to accompanying drawing 3
Claims (4)
1. stake of in method for processing foundation, binding round the strap that is used with stake, it is characterized in that, next setting height scope is provided with a closed annular hoop on the pile crown side, the internal diameter of this hoop is greater than the external diameter of pile crown, hoop is what to separate with stake, stake and the hoop of pile crown come collaborative work by the power transmission of inter-pile soil and bed course, are combined into the stake of strap.
2. according to the described stake of hoop and the strap that is used of stake in method for processing foundation of claim 1, it is characterized in that the cross section of described pile ring is a kind of in rectangle, triangle, " T " font or " L " font, the circular cross-section form.
3. according to the described stake of in method for processing foundation, binding round the strap that is used with stake of claim 1, it is characterized in that headroom is reserved on a top of described stake.
4. according to the described stake of binding round the strap that is used with stake in method for processing foundation of claim 1, it is characterized in that for the pile foundation that has cushion cap, hoop stretches into cushion cap inside, the reinforcing bar of cushion cap and the reinforcing bar of hoop interconnect.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101609661A CN101191327B (en) | 2007-12-14 | 2007-12-14 | Hoop for pile head and pile with hoop |
| PCT/CN2008/073337 WO2009076858A1 (en) | 2007-12-14 | 2008-12-04 | Pile with hoop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101609661A CN101191327B (en) | 2007-12-14 | 2007-12-14 | Hoop for pile head and pile with hoop |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101191327A CN101191327A (en) | 2008-06-04 |
| CN101191327B true CN101191327B (en) | 2010-12-15 |
Family
ID=39486518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101609661A Expired - Fee Related CN101191327B (en) | 2007-12-14 | 2007-12-14 | Hoop for pile head and pile with hoop |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101191327B (en) |
| WO (1) | WO2009076858A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101768962B (en) * | 2009-01-05 | 2013-09-25 | 吴保全 | Precast perforated pipe |
| CN104264660A (en) * | 2014-10-14 | 2015-01-07 | 薛江炜 | Cast-in-place pile head construction method capable of retaining pile top laitance |
| CN104264661B (en) * | 2014-10-14 | 2017-06-06 | 薛江炜 | A kind of construction for changing stake top stress |
| 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 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85108550A (en) * | 1985-11-30 | 1987-06-03 | 清华大学 | Prestressed concrete foundation pile |
| JP3963921B2 (en) * | 2005-06-24 | 2007-08-22 | 大亜ソイル株式会社 | Reinforcement fence for concrete pile |
| CN2841769Y (en) * | 2005-10-12 | 2006-11-29 | 山西省机械施工公司 | Compound pile cover |
-
2007
- 2007-12-14 CN CN2007101609661A patent/CN101191327B/en not_active Expired - Fee Related
-
2008
- 2008-12-04 WO PCT/CN2008/073337 patent/WO2009076858A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2009076858A1 (en) | 2009-06-25 |
| CN101191327A (en) | 2008-06-04 |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101215 Termination date: 20151214 |
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| EXPY | Termination of patent right or utility model |