CN206986903U - A kind of concrete-filled steel tubular hollow supporting construction suitable for Metro Deep Excavation - Google Patents
A kind of concrete-filled steel tubular hollow supporting construction suitable for Metro Deep Excavation Download PDFInfo
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- CN206986903U CN206986903U CN201720854527.XU CN201720854527U CN206986903U CN 206986903 U CN206986903 U CN 206986903U CN 201720854527 U CN201720854527 U CN 201720854527U CN 206986903 U CN206986903 U CN 206986903U
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Abstract
The utility model discloses a kind of concrete-filled steel tubular hollow supporting construction suitable for Metro Deep Excavation, including the first steel pipe (1), the second steel pipe (3) and concrete layer (2)；Wherein, first steel pipe (1) is located at outermost layer, a diameter of 600~1200mm；Second steel pipe (3) is internal located at first steel pipe (1), and its diameter determines according to the thickness of first steel pipe (1) and concrete layer (2), for compressing the concrete layer (2)；The concrete layer (2), it is located between first steel pipe (1) and the second steel pipe (3), thickness is 50~200mm, for connecting first steel pipe (1) and the second steel pipe (3), so as to form overall concrete filled steel tube supporting construction.Concrete filled steel tube supporting construction of the present utility model, under conditions of size is reduced, reach and the bearing capacity more than steel pipe support, while can also reduce the deadweight of structure, the transport and installation of convenient support.
Description
Technical field
Embodiment of the present utility model belongs to railway traffic engineering technical field, is applied to ground more particularly, to one kind
The concrete-filled steel tubular hollow supporting construction of iron deep basal pit.
Background technology
In Metro Deep Excavation construction, mainly narrow long type foundation ditch.At present, the main support body used for subway foundation pit
System is generally armored concrete or steel pipe support, especially steel pipe support using relatively broad, and its advantage is that bracing members can weigh
It is multiple to utilize, but the destabilization problems of steel construction are the important restriction factors of bearing capacity.
In order to solve the problems such as inadequate bearing capacity existing for steel pipe support, easy unstability, there is patent to propose using steel pipe
Concrete support, can effectively solve the destabilization problems of bracing members, but fill concrete weight is big, causes support moment of flexure to increase,
Very big influence be present in the actual compression bearing on support.
Conventional bracing members are in light weight, are readily transported and install, but exist when axle pressure is larger the problem of unstability；Steel pipe mixes
Solidifying soil support, efficiently solves destabilization problems, but because fill concrete weight is big, causes support moment of flexure to increase, also restrict support
The pressure that is pressurized design bearing capacity.
Utility model content
For the disadvantages described above or Improvement requirement of prior art, the utility model provides a kind of suitable for Metro Deep Excavation
Concrete-filled steel tubular hollow supporting construction, conventional bracing members and concrete filled steel tube can be avoided to support the problem of existing, you can fully
The Compressive Bearing Capacity of support is played, can avoid that concrete filled steel tube supported weight is big, transports and installs the problems such as inconvenient again.
To achieve these goals, the utility model provides a kind of concrete-filled steel tubular hollow branch suitable for Metro Deep Excavation
Support structure, including the first steel pipe, the second steel pipe and concrete layer；
Wherein, first steel pipe is located at outermost layer, a diameter of 600~1200mm, makees for directly carrying extraneous load
With；
Second steel pipe is located at first steel duct, and its diameter is according to the thickness of first steel pipe and concrete layer
Degree determines, for compressing the concrete layer；
The concrete layer, it is located between first steel pipe and the second steel pipe, and thickness is 50~200mm, for even
First steel pipe and the second steel pipe are connect, so as to form overall concrete filled steel tube supporting construction.
Further, the concrete layer is slightly expanded concrete, is realized for volumetric expansion after solidification to described the
The effect of contraction of one steel pipe and the second steel pipe.
Further, the concrete layer is lightweight concrete, for mitigating the weight of the concrete filled steel tube supporting construction
Amount.
Further, the wall thickness of first steel pipe is 8~16mm, for ensureing enough strength and stiffness.
Further, the wall thickness of second steel pipe is 8~16mm.
In general, by the contemplated above technical scheme of the utility model compared with prior art, can obtain down
Row beneficial effect：
(1) hollow pipe concrete support structure of the present utility model, can using new concrete-filled steel tubular hollow supported design
With the bearing capacity under conditions of support size is reduced, reaching and being supported more than raw steel, while the deadweight of support can be also reduced, side
Just the transport and installation supported.
(2) hollow pipe concrete support structure of the present utility model, can effectively reduce support diameter, improve support by
Bearing capacity is pressed, avoids stability problem existing for bracing members, also avoiding concrete filled steel tube from supporting, existing deadweight is excessive, and compression is held
The problem of carrying power restriction.
(3) hollow pipe concrete support structure of the present utility model, convenience in transport simplify support installation, can accelerate construction speed
Degree, improve execution conditions, economical rationality, technology maturation, have a extensive future, possess good Social benefit and economic benefit.
Brief description of the drawings
Fig. 1 supports sectional schematic diagram for conventional steel pipe in the prior art；
Fig. 2 is conventional steel pipe concrete support sectional schematic diagram in the prior art；
Fig. 3 is that a kind of concrete-filled steel tubular hollow of the utility model embodiment supports sectional schematic diagram.
In all of the figs, same reference represents identical technical characteristic, is specially：The steel pipes of 1- first, 2- are mixed
Solidifying soil layer, the steel pipes of 3- second.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only explaining this
Utility model, it is not used to limit the utility model.It is in addition, involved in each embodiment of the utility model disclosed below
As long as and to technical characteristic each other do not form conflict can be mutually combined.
In Metro Deep Excavation construction, mainly narrow long type foundation ditch.Fig. 1 supports section to show for conventional steel pipe in the prior art
It is intended to.As shown in figure 1, this supporting construction may be reused, and lift conveniently, efficiency of construction is high, can greatly save
Construction cost.But this supporting construction, it is internal without any supporting object because steel pipe is hollow structure, in foundation pit side-wall soil
Body and water pressure it is larger load effect under, the supporting steel pipe easily produces elastic deformation, is even plastically deformed, so as to cause
Supporting construction unstability, bearing capacity drastically decline, and easily cause track traffic foundation ditch serious accident.
In order to solve the above problems, there is concrete filled steel tube supporting construction.Fig. 2 is conventional steel pipe coagulation in the prior art
Soil support sectional schematic diagram.As shown in Fig. 2 in the steel duct of outer layer first, fill concrete structure, so as to greatly strengthen this
The bearing capacity of kind supporting construction, further, since concrete is filled with steel pipe forms concrete filled steel tube, this structure
It under the operating mode compared with big load, will not also deform, supporting construction unstability will not be caused, possess very high reliability,
Destabilization problems are efficiently solved, but because fill concrete weight is big, cause support moment of flexure to increase, also restrict support compression pressure design
Bearing capacity, in addition, the concrete scale of construction of this structure filling is huge, engineering cost is very high.
Therefore, in order to solve the above problems, the utility model proposes a kind of concrete-filled steel tubular hollow supporting construction.Fig. 3 is
A kind of concrete-filled steel tubular hollow support sectional schematic diagram of the utility model embodiment.As shown in figure 3, the supporting construction outer layer is adopted
The second steel pipe, the fill concrete between the first steel pipe and the second steel pipe are used with the first steel pipe, internal layer, the second steel duct is adopted
With hollow structure, so as to form concrete-filled steel tubular hollow supporting construction.This concrete-filled steel tubular hollow supporting construction, using inside and outside
Concrete between steel pipe, participate in support and be pressurized.Internal steel pipe main function is to participate in confined concrete, can be increased substantially
The compression bearing of concrete, while reduce the deadweight of support.The constraint to concrete, Ke Yiti simultaneously be present in outer and inner tube
High concrete ductility, improve the compression bearing of concrete.Because the presence of concrete between outer and inner tube, outer and inner tube also by
To constraint, it is possible to prevente effectively from the unstability of steel pipe.The method for comprehensively utilizing the performance of steel pipe and concrete material, can reduce branch
Support size and weight, convenient construction and transport, installation.
As shown in figure 3, in one embodiment of the present utility model, the diameter of the steel pipe of outside first is true according to the actual requirements
It is fixed, preferably 600~1200mm.The wall thickness of first steel pipe determines according to the actual requirements, generally 8~16mm, ensures enough
Strength and stiffness.
In one embodiment of the present utility model, the thickness of intermediate concrete is 50~200mm.Meeting supporting construction
In the case of bearing capacity, the thickness of concrete layer is more thin more helps to mitigate the weight of whole concrete filled steel tube supporting construction, section
Save concrete amount.The thickness of specific concrete layer determines according to extraneous load, ensures enough bearing capacities.
In one embodiment of the present utility model, intermediate concrete layer can use lightweight concrete or microdilatancy coagulation
Soil, further mitigate the weight of concrete filled steel tube.In addition, slightly expanded concrete is after solidification, volumetric expansion, coagulation is filled
Soil forms very strong effect of contraction to the first steel pipe and the second steel pipe, firmly connects into an entirety, overcomes bracing members
The risk of unstability, the gross weight and sectional dimension of support, convenience in transport and installation can be effectively reduced, improve service efficiency.
In one embodiment of the present utility model, the diameter of the steel pipe of internal layer second is according to the first steel pipe and concrete layer
Thickness determines.The thickness of second steel pipe determines according to the actual requirements, generally 8~16mm, ensures enough strength and stiffness.
In one embodiment of the present utility model, the thickness of the first steel pipe and the second steel pipe is different, the steel pipe of inner side second
Presence, provides and effectively constrains for the concrete of inside filling, improve the compression bearing of concrete；It can avoid mixing simultaneously
A large amount of fillings of soil are coagulated, reduce the gross weight of supporting member.
As it will be easily appreciated by one skilled in the art that preferred embodiment of the present utility model is the foregoing is only, not
For limiting the utility model, any modification of all made within spirit of the present utility model and principle, equivalent substitution and change
Enter, should be included within the scope of protection of the utility model.
Claims (5)
1. a kind of concrete-filled steel tubular hollow supporting construction suitable for Metro Deep Excavation, it is characterised in that including the first steel pipe
(1), the second steel pipe (3) and concrete layer (2)；
Wherein, first steel pipe (1) is located at outermost layer, a diameter of 600~1200mm, makees for directly carrying extraneous load
With；
Second steel pipe (3) is internal located at first steel pipe (1), and its diameter is according to first steel pipe (1) and concrete
The thickness of layer (2) determines, for compressing the concrete layer (2)；
The concrete layer (2), it is located between first steel pipe (1) and the second steel pipe (3), and thickness is 50~200mm, is used
In connecting first steel pipe (1) and the second steel pipe (3), so as to form overall concrete filled steel tube supporting construction.
2. a kind of concrete-filled steel tubular hollow supporting construction suitable for Metro Deep Excavation according to claim 1, its feature
It is, the concrete layer (2) is slightly expanded concrete, is realized for volumetric expansion after solidification to first steel pipe (1)
With the effect of contraction of the second steel pipe (3).
3. a kind of concrete-filled steel tubular hollow supporting construction suitable for Metro Deep Excavation according to claim 1 or 2, it is special
Sign is that the concrete layer (2) is lightweight concrete, for mitigating the weight of the concrete filled steel tube supporting construction.
4. a kind of concrete-filled steel tubular hollow supporting construction suitable for Metro Deep Excavation according to claim 1, its feature
It is, the wall thickness of first steel pipe (1) is 8~16mm, for ensureing enough strength and stiffness.
5. a kind of concrete-filled steel tubular hollow supporting construction suitable for Metro Deep Excavation according to claim 1, its feature
It is, the wall thickness of second steel pipe (3) is 8~16mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720854527.XU CN206986903U (en) | 2017-07-13 | 2017-07-13 | A kind of concrete-filled steel tubular hollow supporting construction suitable for Metro Deep Excavation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720854527.XU CN206986903U (en) | 2017-07-13 | 2017-07-13 | A kind of concrete-filled steel tubular hollow supporting construction suitable for Metro Deep Excavation |
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| CN206986903U true CN206986903U (en) | 2018-02-09 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107217675A (en) * | 2017-07-13 | 2017-09-29 | 中铁第四勘察设计院集团有限公司 | A kind of concrete-filled steel tubular hollow supporting construction suitable for Metro Deep Excavation |
| CN114016515A (en) * | 2021-09-30 | 2022-02-08 | 中铁第四勘察设计院集团有限公司 | Double-steel-pipe concrete pile foundation pit supporting method |
-
2017
- 2017-07-13 CN CN201720854527.XU patent/CN206986903U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107217675A (en) * | 2017-07-13 | 2017-09-29 | 中铁第四勘察设计院集团有限公司 | A kind of concrete-filled steel tubular hollow supporting construction suitable for Metro Deep Excavation |
| CN114016515A (en) * | 2021-09-30 | 2022-02-08 | 中铁第四勘察设计院集团有限公司 | Double-steel-pipe concrete pile foundation pit supporting method |
| CN114016515B (en) * | 2021-09-30 | 2023-03-10 | 中铁第四勘察设计院集团有限公司 | Double-steel-pipe concrete pile foundation pit supporting method |
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