CN209025072U - Reinforced concrete sleeve stake - Google Patents
Reinforced concrete sleeve stake Download PDFInfo
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- CN209025072U CN209025072U CN201821602676.8U CN201821602676U CN209025072U CN 209025072 U CN209025072 U CN 209025072U CN 201821602676 U CN201821602676 U CN 201821602676U CN 209025072 U CN209025072 U CN 209025072U
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Abstract
The utility model discloses a kind of reinforced concrete sleeve stakes, belong to civil engineering field, to solve the problem of that existing tube-in-tube pile can not be applied and higher cost in big, intermediate diameter pile foundation engineering.Including outer tube, interior stake；The interior stake indulges muscle by stake, the built-in concrete of pile ring muscle encloses, the lower part stake diameter of interior stake is big, and the top stake diameter of interior stake is small, is connected between lower part stake and top stake by down big up small reducer, top stake is outer to be arranged outer tube, and discrete material layer is equipped between outer tube and stake holes.Pile-side negative friction can be greatly decreased to the adverse effect of pile foundation in the utility model, easy to operate, improve the bearing capacity of pile foundation, reduce sedimentation, extend durability.The utility model convenient construction, it is environment friendly and pollution-free.
Description
Technical field
The utility model belongs to civil engineering field, and in particular to Yi Zhong great, intermediate diameter are that armored concrete fills
Infuse stake.
Background technique
The effect of pile foundation is that load is reached to the good soil layer of underground higher depth load-carrying properties, to meet bearing capacity and sedimentation
Requirement.The bearing capacity of pile foundation is high, can bear Vertical Load, can also bear horizontal loading, can resist uplift load and also can
Oscillatory load is born, is most widely used deep foundation form.Pile foundation is since applied widely, bearing capacity is high, settling amount
It is small, it is widely used in the engineerings such as building, bridge, harbour.
Pile foundation is classified by bearing characters, can be divided into Piles for Friction Piles, type stake is held at end.Piles for Friction Piles can be divided into friction pile,
Point friction pile, under ultimate limit states, stake top vertical load is born friction pile by pile side resistance, and end resistance is small to be arrived
It is negligible；Under ultimate limit states, stake top vertical load is mainly born by pile side resistance point friction pile.It holds at end
Type stake is divided into end-bearing pile, friction end-bearing pile, and under ultimate limit states, stake top vertical load is held end-bearing pile by end resistance
By pile side resistance is small to negligible；End-bearing pile rub under ultimate limit states, stake top vertical load is mainly by stake
End resistance is born.Friction pile, point friction pile, friction side hold stake top vertical load whole, main or part pile side resistance is held
By.
But China region is wide, and engineering geological condition is complicated, collapsible loess, banket, the special soils such as frozen soil, salinized soil it is wide
General distribution.Stake top vertical load cannot not only be born by pile side resistance in these Special soil foundations, and stake side can generate it is negative
Frictional resistance has an adverse effect to Pile Bearing Capacity and sedimentation.
There is cavity between existing tube-in-tube pile outer tube and interior stake, interior stake, can not be in big, intermediate diameter since slenderness ratio limits
It is applied in pile foundation engineering, and interior stake is mostly steel, higher cost.
Utility model content
The purpose of this utility model provides a kind of reinforced concrete sleeve stake, can not be big or middle to solve existing tube-in-tube pile
It is applied in equal diameter pile foundation engineering, and the problem of higher cost.
The technical solution adopted in the utility model is: a kind of reinforced concrete sleeve stake, including outer tube, interior stake；It is described
Interior stake indulges muscle by stake, the built-in concrete of pile ring muscle encloses, and the lower part stake diameter of interior stake is big, and the top stake diameter of interior stake is small, under
It is connected between portion's stake and top stake by down big up small reducer, top stake is outer to be arranged outer tube, sets between outer tube and stake holes
There is discrete material layer.
The lower part of the outer tube is in down big up small bell mouth shape as a further improvement of the utility model,.
As a further improvement of the utility model,
As a further improvement of the utility model, the discrete material layer with a thickness of 50mm-200mm.
The stake upper diameter is 250mm-1100mm as a further improvement of the utility model,.
The stake lower diameter is 350mm-1200mm as a further improvement of the utility model,.
The utility model is applied to tube-in-tube pile in big, intermediate diameter pile foundation engineering by foundation treatment mode expansion, reduces
Cost, can be greatly decreased pile-side negative friction to the adverse effect of pile foundation, easy to operate, improve the bearing capacity of pile foundation, subtract
Small sedimentation extends durability.The utility model convenient construction, it is environment friendly and pollution-free.
Compared with the prior art, the utility model has the following advantages:
1. the utility model pass through collapsible loess, banket, the special soil layer such as frozen soil, salinized soil when, since stake diameter becomes
It is small, reduce pile-side negative friction；
2. outer tube is arranged in special soil layer, the durability of pile foundation is extended, housing tube wall is smooth, further subtracts
Small adverse effect of the stake side force of negative friction to pile foundation；
3. filling discrete material between outer tube and stake holes, adverse effect of the isolation pile side foundation soil to tube-in-tube pile.
4. utility model can be widely used in collapsible loess, banket, the Special soil foundations such as frozen soil, salinized soil, to durable
In the high pile foundation of property, settlement request.
Detailed description of the invention
Fig. 1 is a kind of reinforced concrete sleeve stake schematic diagram；
Fig. 2 is A-A view in Fig. 1；
Fig. 3 is B-B view in Fig. 1.
Appended drawing reference meaning is as follows: muscle is indulged in stake；2-pile ring muscle；3-concrete；4-outer tubes；5- discrete material layer；
6-pile framings；7- stake holes；The stake of the lower part 8-；The stake of the top 9-；C- reducer.
Specific embodiment
The technical solution of the utility model is described in further detail with reference to the accompanying drawing.
As shown, a kind of reinforced concrete sleeve stake, including outer tube 4, interior stake；Interior stake indulges muscle 1, pile ring muscle 2 by stake
Built-in concrete 3 encloses, and the lower part of interior stake 8 diameters of stake are big, and top 9 diameters of stake of interior stake are small, lower part stake 8 and top stake 9 it
Between be connected by down big up small reducer C, outer tube 4 is set outside top stake 9, discrete material is equipped between outer tube 4 and stake holes 7
Layer 5.The lower part of outer tube 4 is in down big up small bell mouth shape.Outer tube the plastic material pipe or metal material smooth using surface
Matter pipe.
Specific implementation step are as follows:
1, scene passes through surveying setting-out spacer bar concrete jacket tubular pole；
2, by mechanical equipment or it is artificially formed stake holes 7；
3, the interior stake that muscle 1 is indulged in stake, pile ring muscle 2 forms is sunk at clear bottom after pore-forming；
4, at casting concrete to stake section reducer C, it is put into outer tube 4, casting concrete to stake top, pile framing 6
Lower section；
5, outer tube is further decreased to the filler for inserting coarse sand or other discrete materials isolation negative friction between stake holes
Adverse effect of the pile-side negative friction to stake.
Embodiment 1
The arrangement of stake, stake diameter and stake are long by specifically designing determination in present embodiment.
1, vertical bearing capacity of single pile characteristic value is calculated:
(1) according to the empirical relation between the physical index of soil and carrying force parameter, ultimate bearing capacity of single pile standard is determined
Value:
Qsk: total ultimate frictional resistance standard value；
Qpk: total standard ultimate bearing capacity；
qsik: the native ultimate frictional resistance standard value in i-th layer of stake side only counts neutral point or less part side resistance value；
qpk: ultimate end resistance of pile standard value；
Ψsi、ψp: side, end resistance dimensions effect coefficient, calculating is shown in Table 1；
U: stake lower perimeter；
Quk: vertical bearing capacity of single pile；
Li: i-th layer of native thickness；
Ap: stake end area.
(2) vertical bearing capacity of single pile characteristic value RaIt should determine as the following formula:
Ra: vertical bearing capacity of single pile characteristic value
K: safety coefficient takes K=2.
(3) type foundation pile is held for end and is considered as the downdrag that negative friction causes foundation pile, and checking computations foundation pile is held as the following formula
Carry power:
Nk: foundation pile vertical bearing capacity.
Since the utility model is when passing through the special soil layer that can generate pile-side negative friction, stake diameter becomes smaller, outer tube pipe
Wall is smooth, and discrete material layer is isolated so that pile-side negative friction reduces or even eliminates, constant in vertical bearing capacity of single pile characteristic value
In the case where, improve foundation pile vertical bearing capacity.
2, the negative friction of outer tube is measured by testing.
3, by designing, calculating acquires a diameter size and stake is long.
4, production and site operation.
As the case may be, discrete material layer with a thickness of 50mm-200mm.Stake upper diameter is 250mm-1100mm.Stake
Lower diameter is 350mm-1200mm, and stake end can do enlarged footing.Stake is long to be greater than 6m, with specific reference to geological state, upper load etc.
It is determined by design.The length of outer tube 4 is determined according to special the thickness of the layer etc. by design.
Claims (5)
1. a kind of reinforced concrete sleeve stake, including outer tube, interior stake；It is characterized by: the interior stake indulges muscle (1), stake by stake
Stirrup (2) built-in concrete (3) encloses, and lower part stake (8) diameter of interior stake is big, and top stake (9) diameter of interior stake is small, lower part stake
(8) be connected between top stake (9) by down big up small reducer, outer tube (4) are arranged outside in top stake (9), outer tube (4) and
Discrete material layer (5) are equipped between stake holes (7).
2. reinforced concrete sleeve stake according to claim 1, it is characterised in that: under the lower part of the outer tube (4) is in
Small bell mouth shape upper greatly.
3. reinforced concrete sleeve stake according to claim 1 or 2, it is characterised in that: the thickness of the discrete material layer
For 50mm-200mm.
4. reinforced concrete sleeve stake according to claim 3, it is characterised in that: the stake upper diameter is 250mm-
1100mm。
5. reinforced concrete sleeve stake according to claim 4, it is characterised in that: the stake lower diameter is 350mm-
1200mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821602676.8U CN209025072U (en) | 2018-09-29 | 2018-09-29 | Reinforced concrete sleeve stake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821602676.8U CN209025072U (en) | 2018-09-29 | 2018-09-29 | Reinforced concrete sleeve stake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209025072U true CN209025072U (en) | 2019-06-25 |
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ID=66905198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821602676.8U Active CN209025072U (en) | 2018-09-29 | 2018-09-29 | Reinforced concrete sleeve stake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209025072U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108951615A (en) * | 2018-09-29 | 2018-12-07 | 兰州有色冶金设计研究院有限公司 | Reinforced concrete sleeve stake and its construction method |
| CN115162318A (en) * | 2022-07-13 | 2022-10-11 | 中国电建集团昆明勘测设计研究院有限公司 | Open-close type isolation pile for controlling influence of vacuum preloading environment and isolation method thereof |
-
2018
- 2018-09-29 CN CN201821602676.8U patent/CN209025072U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108951615A (en) * | 2018-09-29 | 2018-12-07 | 兰州有色冶金设计研究院有限公司 | Reinforced concrete sleeve stake and its construction method |
| CN115162318A (en) * | 2022-07-13 | 2022-10-11 | 中国电建集团昆明勘测设计研究院有限公司 | Open-close type isolation pile for controlling influence of vacuum preloading environment and isolation method thereof |
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