CN107217675A - 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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- CN107217675A CN107217675A CN201710570704.6A CN201710570704A CN107217675A CN 107217675 A CN107217675 A CN 107217675A CN 201710570704 A CN201710570704 A CN 201710570704A CN 107217675 A CN107217675 A CN 107217675A
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- concrete
- steel pipe
- supporting construction
- steel
- tubular hollow
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The invention 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, for directly carrying extraneous load effect；Second steel pipe (3) is internal located at first steel pipe (1), and its diameter is determined 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.The concrete filled steel tube supporting construction of the present invention, under conditions of size is reduced, reaches and more than the bearing capacity of steel pipe support, while the deadweight of structure can be also reduced, the transport and installation of convenient support.
Description
Technical field
Embodiments of the invention belong to railway traffic engineering technical field, and it is deep to be applied to subway more particularly, to one kind
The concrete-filled steel tubular hollow supporting construction of foundation ditch.
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 and applies relatively broad, and its advantage is that bracing members can be weighed
It is multiple to utilize, but the destabilization problems of steel construction are the important restriction factors of bearing capacity.
In order to solve steel pipe support presence bearing capacity is inadequate, easy unstability the problems such as, there is patent to propose and use steel pipe
Concrete support, can effectively solve the destabilization problems of bracing members, but fill concrete weight is big, cause support moment of flexure to increase,
There is very big influence in the actual compression bearing on support.
Conventional bracing members are lightweight, be readily transported and install, but exist when axle pressure is larger the problem of unstability；Steel pipe is mixed
Solidifying soil support, efficiently solves destabilization problems, but because fill concrete weight is big, causes support moment of flexure to increase, also restriction support
The pressure that is pressurized design bearing capacity.
The content of the invention
For the disadvantages described above or Improvement requirement of prior art, the present invention provides a kind of suitable for the hollow of Metro Deep Excavation
Concrete filled steel tube supporting construction, can avoid conventional bracing members and concrete filled steel tube from supporting the problem of existing, you can to give full play to
The Compressive Bearing Capacity of support, the problems such as big concrete filled steel tube supported weight, transport can be avoided again and inconvenience is installed.
To achieve these goals, the present invention provides a kind of concrete-filled steel tubular hollow suitable for Metro Deep Excavation and supports knot
Structure, including the first steel pipe, the second steel pipe and concrete layer；
Wherein, first steel pipe is located at outermost layer, and 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 is determined, 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, the weight for mitigating 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 present invention compared with prior art, it can obtain down and show
Beneficial effect：
(1) hollow pipe concrete support structure of the invention, using new concrete-filled steel tubular hollow supported design, Ke Yi
Reduce under conditions of support size, reach and more than the bearing capacity of raw steel support, while the deadweight of support can be also reduced, convenient branch
The transport and installation of support.
(2) hollow pipe concrete support structure of the invention, can effectively reduce support diameter, and the compression for improving support is held
Carry power, it is to avoid the stability problem that bracing members are present, the deadweight for also avoiding concrete filled steel tube support from existing is excessive, compression bearing
The problem of limitation.
(3) hollow pipe concrete support structure of the invention, convenient transport simplifies support and installed, and can accelerate speed of application,
Improve execution conditions, economical rationality, technology maturation has a extensive future, and possesses good Social benefit and economic benefit.
Brief description of the drawings
Fig. 1 is the support sectional schematic diagram of conventional steel pipe in the prior art；
Fig. 2 is conventional steel pipe concrete support sectional schematic diagram in the prior art；
Fig. 3 supports sectional schematic diagram for a kind of concrete-filled steel tubular hollow of the embodiment of the present invention.
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 to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, not
For limiting the present invention.As long as in addition, technical characteristic involved in each embodiment of invention described below that
Not constituting conflict between this can just be mutually combined.
In Metro Deep Excavation construction, mainly narrow long type foundation ditch.Fig. 1 shows for the support section of conventional steel pipe in the prior art
It is intended to.As shown in figure 1, this supporting construction may be reused, and lifting is convenient, and 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
Under body and the larger load effect of water pressure, the supporting steel pipe easily produces elastic deformation, is even plastically deformed, so as to cause
Supporting construction unstability, bearing capacity drastically declines, and easily causes track traffic foundation ditch serious accident.
In order to solve the above problems, concrete filled steel tube supporting construction is occurred in that.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 supporting construction is planted, 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 restriction supports the pressure design that is pressurized
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 present invention proposes a kind of concrete-filled steel tubular hollow supporting construction.Fig. 3 is this hair
A kind of concrete-filled steel tubular hollow support sectional schematic diagram of bright embodiment.As shown in figure 3, the supporting construction outer layer uses the first steel
Pipe, internal layer use the second steel pipe, and the fill concrete between the first steel pipe and the second steel pipe, the second steel duct uses hollow knot
Structure, so as to form concrete-filled steel tubular hollow supporting construction.This concrete-filled steel tubular hollow supporting construction, using between outer and inner tube
Concrete, participate in support be pressurized.Internal steel pipe main function is to participate in confined concrete, can increase substantially concrete
Compression bearing, while reducing the deadweight of support.There is the constraint to concrete in outer and inner tube, can improve concrete simultaneously
Ductility, improves the compression bearing of concrete.Because the presence of concrete between outer and inner tube, outer and inner tube also suffers restraints,
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 support size
And weight, convenient construction and transport, installation.
As shown in figure 3, in one embodiment of the invention, the diameter of the steel pipe of outside first is determined according to the actual requirements,
Preferably 600~1200mm.The wall thickness of first steel pipe determines according to the actual requirements, generally 8~16mm, it is ensured that enough is strong
Degree and rigidity.
In one embodiment of the invention, the thickness of intermediate concrete is 50~200mm.Meeting supporting construction carrying
In the case of power, the thickness of concrete layer is more thin more helps to mitigate the weight of whole concrete filled steel tube supporting construction, saves mixed
Solidifying soil consumption.The thickness of specific concrete layer is determined according to extraneous load, it is ensured that enough bearing capacities.
In one embodiment of the invention, intermediate concrete layer can use lightweight concrete or slightly expanded concrete,
Further mitigate the weight of concrete filled steel tube.In addition, slightly expanded concrete is after solidification, volumetric expansion, fill concrete
Very strong effect of contraction is formed to the first steel pipe and the second steel pipe, an entirety is firmly connected into, overcomes bracing members to lose
Steady risk, can effectively reduce the gross weight and sectional dimension of support, convenient transport and installation improve service efficiency.
In one embodiment of the invention, the diameter of the steel pipe of internal layer second is according to the first steel pipe and the thickness of concrete layer
It is determined that.The thickness of second steel pipe determines according to the actual requirements, generally 8~16mm, it is ensured that enough strength and stiffness.
In one embodiment of the invention, the thickness of the first steel pipe and the second steel pipe is different, and the steel pipe of inner side second is deposited
Effective constraint is being provided for the concrete of inside filling, the compression bearing of concrete is improved；Concrete can be avoided simultaneously
A large amount of fillings, reduce supporting member gross weight.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, it is not used to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the invention etc., it all should include
Within protection scope of the present invention.
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, and 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) is determined, 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
Levy and be, the concrete layer (2) is lightweight concrete, the weight for mitigating 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 |
|---|---|---|---|
| CN201710570704.6A CN107217675A (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 |
|---|---|---|---|
| CN201710570704.6A CN107217675A (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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| CN107217675A true CN107217675A (en) | 2017-09-29 |
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| CN201710570704.6A Pending CN107217675A (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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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110761295A (en) * | 2019-10-28 | 2020-02-07 | 中铁第四勘察设计院集团有限公司 | Prefabricated assembled concrete pipe props structure |
| CN114991170A (en) * | 2022-06-23 | 2022-09-02 | 中国水利水电第七工程局有限公司 | Hollow interlayer concrete-filled steel tube supporting system and construction method thereof |
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| CN1538012A (en) * | 2003-10-23 | 2004-10-20 | 孔凡营 | Hollow steel pipe with concrete in gap of coaxial-pipe |
| CN2740699Y (en) * | 2003-09-30 | 2005-11-16 | 韩林海 | Concrete structure with hollow sandwich layer of steel pipe |
| CN202039455U (en) * | 2010-11-12 | 2011-11-16 | 北京工业大学 | Hollow sandwich steel pipe active powder concrete composite component |
| CN205954656U (en) * | 2016-06-06 | 2017-02-15 | 安徽省交通规划设计研究总院股份有限公司 | Double -layer steel manages cement pipe column foundation |
| CN106677552A (en) * | 2016-12-23 | 2017-05-17 | 武汉大学 | Method for solidifying steel pipe column through external sleeveing of circular steel pipe concrete |
| CN206986903U (en) * | 2017-07-13 | 2018-02-09 | 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 |
-
2017
- 2017-07-13 CN CN201710570704.6A patent/CN107217675A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2740699Y (en) * | 2003-09-30 | 2005-11-16 | 韩林海 | Concrete structure with hollow sandwich layer of steel pipe |
| CN1538012A (en) * | 2003-10-23 | 2004-10-20 | 孔凡营 | Hollow steel pipe with concrete in gap of coaxial-pipe |
| CN202039455U (en) * | 2010-11-12 | 2011-11-16 | 北京工业大学 | Hollow sandwich steel pipe active powder concrete composite component |
| CN205954656U (en) * | 2016-06-06 | 2017-02-15 | 安徽省交通规划设计研究总院股份有限公司 | Double -layer steel manages cement pipe column foundation |
| CN106677552A (en) * | 2016-12-23 | 2017-05-17 | 武汉大学 | Method for solidifying steel pipe column through external sleeveing of circular steel pipe concrete |
| CN206986903U (en) * | 2017-07-13 | 2018-02-09 | 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 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110761295A (en) * | 2019-10-28 | 2020-02-07 | 中铁第四勘察设计院集团有限公司 | Prefabricated assembled concrete pipe props structure |
| CN114991170A (en) * | 2022-06-23 | 2022-09-02 | 中国水利水电第七工程局有限公司 | Hollow interlayer concrete-filled steel tube supporting system and construction method thereof |
| CN114991170B (en) * | 2022-06-23 | 2023-06-13 | 中国水利水电第七工程局有限公司 | Hollow interlayer steel pipe concrete supporting system and construction method thereof |
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