CN106351235A - Assembled type four-combined-round-steel-pipe concrete inner support structure and manufacturing method - Google Patents

Assembled type four-combined-round-steel-pipe concrete inner support structure and manufacturing method Download PDF

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Publication number
CN106351235A
CN106351235A CN201610924568.1A CN201610924568A CN106351235A CN 106351235 A CN106351235 A CN 106351235A CN 201610924568 A CN201610924568 A CN 201610924568A CN 106351235 A CN106351235 A CN 106351235A
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China
Prior art keywords
steel pipe
concrete
ring flange
support
round steel
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CN201610924568.1A
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Inventor
张明聚
王子田
李少华
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Beijing University of Technology
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Beijing University of Technology
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Priority to CN201610924568.1A priority Critical patent/CN106351235A/en
Publication of CN106351235A publication Critical patent/CN106351235A/en
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00Excavations; Bordering of excavations; Making embankments
    • E02D17/02Foundation pits
    • E02D17/04Bordering surfacing or stiffening the sides of foundation pits

Abstract

The invention relates to an assembled type four-combined-round-steel-pipe concrete inner support structure and a manufacturing method, and belongs to the technical field of inner supports of a foundation pit of a metro station. The assembled type four-combined-round-steel-pipe concrete inner support structure comprises different types of round steel pipe concrete straight supports including short-connection straight supports and standard straight supports; the straight supports are connected with one another through high-intensity bolts; all members consist of round steel pipes filled with ultrahigh-intensity concrete; the cross sections of four round steel pipes are arrayed in a square. By different forms of length combinations of the members, the requirement for inner support splicing of foundation pits with different lengths is met; the assembled type four-combined-round-steel-pipe concrete inner support structure which is high in rigidity, can be repeatedly used, can reduce the manufacturing cost and is used as an inner support in the foundation pit or a vertical shaft exterior protected construction system; the problems of complicated construction and high manufacturing cost of a concrete support can be effectively solved. The comprehensive benefit is outstanding, and the assembled type four-combined-round-steel-pipe concrete inner support structure has important engineering application value and development prospect.

Description

Four combination concrete filled steel tube inner supporting structures of assembled and manufacture method
Technical field
The present invention relates to a kind of assembled combination concrete filled steel tube for deep basal pit or shaft enclosure structure inner support Inner supporting structure and manufacture method, good particularly to an integrity, can strictly control building enclosure to deform, repeat utilization Four combination concrete filled steel tube inner supporting structures of assembled and manufacture method, belong to Metro station excavation inner support support technology Field.
Background technology
At present, Construction of Urban Rail Traffic becomes the requisite part of urban construction.Because rail line is Realize the transfer between each bar circuit, station is built deeper and deeper, need strictly to control deformation in construction.Build the engineering method master of subway Cut and cover method to be had, subsurface excavation method or shield method, open cut of subway station foundation ditch etc. is frequently with inner supporting type building enclosure.For effective control Deformation, inner support system is frequently with bracing members and reinforced concrete support.Bracing members rigidity is little, when foundation ditch span is larger, steel Support meeting unstability because amount of deflection is excessive;And bracing members internal corrosion situation is serious, recycling rate of waterused is low.Concrete support rigidity Greatly, deformation is little, but construction will be through live assembling reinforcement, the operation such as formwork and form removal, makes and construction is complicated, the duration is longer;Make For temporary structure, after the completion of construction, need explosion or manual demolition it is impossible to reuse, cost is high.One kind proposed by the present invention Assembled for deep basal pit or shaft enclosure structure inner support combines concrete filled steel tube inner supporting structure, has and mixes with reinforcing bar Solidifying soil supports identical rigidity, and can reuse, and reduces construction costs.
Content of the invention
The purpose of the present invention is to be to provide a kind of rigidity big, repeats and utilizes, reduces cost, encloses as foundation ditch or vertical shaft Four combination concrete filled steel tube inner supporting structures of the assembled of inner support and manufacture method in protection structure system, can be effectively The construction solving concrete support is complicated, cost is high, long in time limit the problems such as.
The technical solution adopted in the present invention is as follows:
A kind of four combination concrete filled steel tube inner supporting structures of assembled, go along with sb. to guard him for pattern foundation pit supporting structure or vertical shaft, including Standard straight support and short circuit directly support;The support of described standard straight and the straight support of short circuit all include four round steel pipe be arrangeding in parallel, four The square arrangement in cross section of round steel pipe, to increase vertical flexural resistance;The support of described standard straight and short circuit directly support Two ends, that is, the two ends of four round steel pipe be respectively welded with ring flange and end-plate, described ring flange and end-plate are by described mark Four round steel pipe closed at both ends that collimation supports and short circuit directly supports, are filled with concrete inside round steel pipe;Described ring flange and end The surrounding of shrouding is provided with bolt hole;The length that described short circuit directly supports is less than the length of standard straight support;Described ring flange and end It is provided with drawknot dowel, whole section of described drawknot dowel is cast in round steel pipe inner concrete between shrouding and round steel pipe inner concrete In, its one end and ring flange or end seal plate weld, end internal force not only can be by the weldering between ring flange and end-plate and round steel pipe Seam transmission, also can be transmitted by drawknot dowel, strengthen the connection between round steel pipe and endpoint node and stability, increase safety Degree;The reserving hole of four square arrangement is provided with described ring flange, its central axis pair with four round steel pipe respectively Should, pour mouth as concrete;It is provided with tabula, reserved and four circles on described tabula on described standard straight support length direction Outer diameter of steel pipes identical hole, combine round steel pipe component with assembled during welding to agree with, and plays the role of positioning;The work of tabula Interknited with four round steel pipe of principal security integral, improve the globality of four steel pipes, during stress, work worked in coordination with by four steel pipes Make.Described four are welded with polygon and put more energy into floor between round steel pipe and ring flange and end-plate;Many described standard straight supports and Directly the ring flange supportting and end-plate are sequentially connected short circuit by bolt, thus constituting in four combination concrete filled steel tubes of assembled Supporting construction.
Further, the support of described standard straight have 4 kinds dissimilar, it is respectively length 1m, 2m, the standard component of 3m, 6m;Institute State the length that short circuit directly supports and be less than 1m.
Further, described concrete is the super high strength concrete of more than c50, described round steel pipe, tabula, ring flange and end Shrouding is all using q345 steel.
Further, described round steel pipe diameter of section is 180mm-219mm, and round steel thickness of pipe wall is 9mm-10mm.
Further, when described standard straight support length is more than 6m, at every 3m, it is respectively provided with tabula, the thickness of tabula is not less than circle Steel pipe and the thickness of ring flange;Described tabula is quadrangular steel sheets, to mitigate deadweight.
Further, described diameter of bolt hole is not more than the thickness of ring flange and end-plate.
Further, the thickness of described floor of putting more energy into is not less than the thickness of round steel pipe and ring flange.
Further, described floor of putting more energy into is in the form of groove weld, both sides be respectively welded at round steel pipe and ring flange and On end-plate;Described ring flange is annular, while satisfaction is connected with round steel pipe, mitigates flange deadweight.
Further, described round steel pipe external diameter is 180mm, 194mm, 203mm or 219mm, and wall thickness is 9mm or 10mm.
The manufacture methods of four combination concrete filled steel tube inner supporting structures of above-mentioned assembled it is characterised in that:
Described four combination complete batch production manufactures of each component of concrete filled steel tube inner supporting structure of assembled, can scene Quick-assembling becomes concrete filled steel tube inner support system, and its manufacture method is as follows:
The first step, ring flange and end-plate make:
Ring flange is to connect the important component that different length directly supports, and is also to support overall relatively vulnerable area, its production technology Must assure that accurate bolt hole at bolt connection;Wherein ring flange and end-plate lean on round steel pipe side to weld a number of drawing Knot dowel, it is ensured that two sections of straight supports are completely embedded, its main production process is transmission end internal force: blanking, heating, blocking, end Forging, punching the wad, trimming, quenched, shot-peening, welding dowel, dimension control;Reach the due quality of fit of flange through inspection and be conjunction Lattice;
Second step, the selection of round steel pipe:
Four combination concrete filled steel tube inner supporting structures of assembled adopt the combining form of four small-diameter circular steel pipes, little Diameter round steel pipe is hot rolled seamless steel tube, can be in market purchasing;
3rd step, ring flange and end-plate and round steel sealing of tube:
On factory's pedestal, ring flange and end-plate are welded to connect with round steel tube end, and use ribbed stiffener in end Plate is strengthened;When standard straight support length is more than 6m, tabula is set at 3m;
4th step, concrete perfusion:
It is cast in small-diameter circular steel pipe using the super high strength concrete of more than c50, internal concrete is in three-dimensional and is subject to Power state, its intensity can be improved.Using vertical method of vibrating, the one end being welded is carried the combination round steel pipe of end-plate, End-plate one end stands up down;Strictly press charger sheet mixed concrete, and concrete poured into along ring flange reserving hole inwall, Vibrator is started while pouring, closely knit to ensure concreting, it is filled into during concrete perfusion and put down with ring flange outer surface Neat and floating.
Described four combination concrete filled steel tube inner supporting structures of assembled adopt batch production manufacture, can live quick-assembling Become concrete filled steel tube inner support system;After construction terminates, concrete filled steel tube inner support system is disassembled into multistage concrete filled steel tube Component, hangs out from foundation ditch, is available for reusing.
Beneficial effect
Compared with prior art, the invention has the beneficial effects as follows:
The complete batch production manufacture of assembled combined steel pipe concrete component, crudy is protected, and mechanical property is more Reliable;Achieve the live quick-assembling of concrete filled steel tubular member, reduce job site labor intensity and
Construction procedure, saves the erection time of concrete filled steel tube inner support system, can effective reduction of erection time.
With bolt connection circular steel tube concrete component, between component, connect fastening, stability in the large is good.
Round steel pipe is wrapped in super high strength concrete, and concrete receives the constraint of steel pipe walls, makes concrete be in three-dimensional stress State, improves the intensity of concrete;Meanwhile, the filling effect of concrete can prevent steel pipe from occurring local buckling to destroy.Steel pipe Concrete combined structure has excellent mechanical property.
From super high strength concrete as packing material, dead load can be reduced, strengthen the bonding of concrete and steel pipe, carry High steel pipe to concrete Confinement effect.
Super high strength concrete is full of round steel pipe, has intercepted air and water enters steel duct, steel pipe inner wall is not perishable Or corrosion.
Assembled combines concrete filled steel tube inner bracing member simple structure, repeats and utilizes, economic and environment-friendly, with ordinary steel Pipe inner support compares Saving steel amount, reduces cost.
Using single steel pipe less with common steel tube support phase diameter group, to pipe inner concrete restrictive preferably, group After conjunction can effectively solving bracing members the little problem of rigidity, and improve bearing capacity.In steel pipe of the present invention, the concrete of perfusion is Super high strength concrete, strength grade c50 and more than, can play minimizing concrete amount, mitigate the effect of deadweight.The present invention passes through In standard straight support component one determining deviation arrangement diaphragm plate, thus improving the globality of component, increasing bending rigidity, strengthening laterally steady Qualitative.Present configuration end flange is connected by casting concrete at the scene with concrete Guan Liang or coagulation fortifield village purlin, this section Point can bear pressure compared with other forms inner support, also can bear pulling force.
Brief description
Fig. 1, concrete filled steel tube inner support profile;
Fig. 2, assembled combination concrete filled steel tube 1m standard straight support schematic diagram;
Fig. 3, assembled combination concrete filled steel tube 2m standard straight support schematic diagram;
Fig. 4, assembled combination concrete filled steel tube 3m standard straight support schematic diagram;
Fig. 5, assembled combination concrete filled steel tube 6m standard straight support schematic diagram;
Fig. 6, assembled combination concrete filled steel tube short circuit directly support schematic diagram;
Fig. 7, assembled combination concrete filled steel tube directly support schematic cross-section;
Fig. 8, concrete filled steel tube schematic cross-section;
Fig. 9, ring flange schematic diagram;
Figure 10, end-plate schematic diagram;
Figure 11, tabula schematic diagram;
Figure 12, floor schematic diagram of putting more energy into;
Figure 13, bolt schematic diagram;
In figure: 1: standard straight support, 2: short circuit directly supports, 3: round steel pipe, 4: concrete, 5: ring flange, 6: bolt hole, 7: put more energy into Floor, 8: tabula, 9: drawknot dowel, 10: end-plate, 11: reserving hole, 12: outside foundation ditch, 13: building enclosure, 14: hole bottom.
Specific embodiment
The basic thought of the present invention is to combine concrete filled steel tube inner bracing member by assembled assembled, forms one and finishes Whole property is good, and rigidity is big, repeats the inner support system utilizing.
Below by a Metro station excavation embodiment, and combine accompanying drawing, technical scheme is made further Illustrate.Foundation ditch Central Standard excavation width is 21.7m, and end expanding section excavation width is 25.1m.Wherein root in this example According to foundation ditch width requirement, standard straight support is divided into 1m, tri- kinds of specifications of 2m, 3m, 6m, and short circuit directly supports length and is less than 1m.
As shown in Fig. 1~12, four combination concrete filled steel tube inner supporting structures of assembled of the present invention.There are 4 kinds of differences The standard straight support of type, directly supports including short circuit, standard straight supports;Described standard straight supports as shown in Fig. 2,3,4,5, is two ends usage The inside of blue disk 5 and end-plate 10 closing is filled with four round steel pipe 3 of concrete, and surrounding leaves prepared screw-bolt hole 6.Standard straight Support 1 and short circuit directly support 2 and all include four round steel pipe be arrangeding in parallel 3, the square arrangement in cross section of four round steel pipe 3. Standard straight support 1 and short circuit directly support 2 two ends, that is, the two ends of four round steel pipe 3 be respectively welded with ring flange 5 and end-plate 10, described standard straight support 1 and short circuit are directly supportted 2 four round steel pipe 3 closed at both ends, round steel pipe 3 by ring flange 5 and end-plate 10 Inside is filled with concrete 4.The surrounding of ring flange 5 and end-plate 10 is provided with bolt hole 6.The length that short circuit directly supports 2 is less than The length of standard straight support.It is provided with drawknot dowel 9 between ring flange 5 and end-plate 10 and round steel pipe 3 inner concrete 4.Drawknot anchor Whole section of muscle 9 is cast in round steel pipe 3 inner concrete 4, and its one end is welded with ring flange 5 or end-plate 10, and end internal force not only may be used By the weld seam transmission between ring flange and end-plate and round steel pipe, also can be transmitted by drawknot dowel, strengthen round steel pipe and end Connection between node and stability, increase degree of safety.The reserving hole 11 of four square arrangement is provided with ring flange 5, It is corresponding with the central axis of four round steel pipe 3 respectively, pours mouth as concrete;Standard straight supports and arranges on 1 length direction There is tabula 8, reserved and four round steel pipe 3 external diameter identical holes on tabula 8.Four round steel pipe 3 and ring flange 5 and end-plate 10 Between be welded with polygon and put more energy into floor 7, many standard straight supports 1 and short circuit directly support 2 ring flange 5 and end-plate 10 by bolt It is sequentially connected, thus constituting four combination concrete filled steel tube inner supporting structures of assembled.Wherein, concrete 4 is more than c50's Super high strength concrete, when standard straight supports 1 length more than 6m, is respectively provided with tabula 8, the thickness of tabula 8 is not less than round steel pipe 3 at every 3m With the thickness of ring flange 5, tabula 8 is quadrangular steel sheets, and bolt hole 6 diameter is not more than the thickness of ring flange 5 and end-plate 10, plus The thickness of strength floor 7 is not less than the thickness of round steel pipe 3 and ring flange 5, puts more energy into floor 7 in the form of groove weld, and both sides are respectively It is welded on round steel pipe 3 and ring flange 5 and end-plate 10, ring flange 5 is annular.
Described four combination complete batch production manufactures of each component of concrete filled steel tube inner supporting structure of assembled, can scene Quick-assembling becomes concrete filled steel tube inner support system, and its manufacture method is as follows:
The first step, ring flange 5 and end-plate 10 make:
Ring flange 5 is to connect the important component that different length directly supports, and is also to support overall relatively vulnerable area, its production technology Must assure that accurate bolt hole 6 at bolt connection;Wherein ring flange 5 and end-plate 10 lean on round steel pipe 3 side to weld a fixed number The drawknot dowel 9 of amount, it is ensured that two sections of straight supports are completely embedded, its main production process is transmission end internal force: blanking, heating, in advance Forging, finish-forging, punching the wad, trimming, quenched, shot-peening, welding dowel, dimension control;Reach the due quality of fit of flange through inspection As qualified;
Second step, the selection of round steel pipe 3:
Four combination concrete filled steel tube inner supporting structures of assembled adopt the combining form of four small-diameter circular steel pipes 3, Small-diameter circular steel pipe 3 is hot rolled seamless steel tube, can be in market purchasing;
3rd step, ring flange 5 and end-plate 10 and round steel pipe 3 are welded:
On factory's pedestal, ring flange 5 and end-plate 10 are welded to connect with round steel pipe 3 end, and use adds in end Strength floor 7 is strengthened;When standard straight supports 1 length and is more than 6m, tabula 8 is set at 3m;
4th step, concrete perfusion 4:
It is cast in small-diameter circular steel pipe 3 using the super high strength concrete 4 of more than c50, internal concrete is in three-dimensional Stress, its intensity can be improved.Using vertical method of vibrating, the one end being welded is carried the combination round steel of end-plate 10 Pipe, end-plate 10 one end stands up down;Strictly press charger sheet mixed concrete, and by concrete along ring flange 5 reserving hole 11 Inwall pours into, and starts vibrator while pouring, closely knit to ensure concreting, is filled into and ring flange during concrete perfusion 5 flush with outer surface are simultaneously floating.
In factory, according to design drawing to component species, size, number requirement, respectively processing and fabricating standard straight support 1, Short circuit directly supports 2.Taking this example as a example, in all concrete filled steel tubular members, round steel pipe 3 external diameter 180mm, wall thickness 10mm is (for span Big location can adopt the steel pipe of bigger external diameter).Standard straight support 1 includes 1m, the standard component of 2m, 3m, 6m specification.Short circuit directly supports 2 According to engineering assembly length needs, customized production, less than 1m, play polishing filling effect.Structure manufacture adopt material be c50 and Above super high strength concrete, q345 steel.Above four kinds of components fill round steel pipe 3 by super high strength concrete, constitute steel pipe and mix Solidifying soil combinative structure, steel tube-concrete composite structure end is sealed by the ring flange 5 of unified specification and end-plate 10.All components Ring flange 5 prepared screw-bolt hole 6 all in same position.The a diameter of 32mm of bolt hole 6, bolt hole 6 spacing is 150mm, bolt hole 6 It is 20mm away from ring flange 5 Distances Between Neighboring Edge Points.Put more energy into floor 7 in the form of groove weld, both sides are respectively welded at round steel pipe 3 and flange On disk 5 and end-plate 10, floor of putting more energy into can not stop bolt hole 6, and high-strength bolt can not be hindered to screw.
The concrete filled steel tubular member manufacturing in factory is transported to outside the venue.Outside the venue, according to design drawing to component assembly Requirement, many adjacent modular are directly supportted 1 and short circuits directly supports 2 ring flange 5 and end-plate 10 is sequentially connected by bolt, make The concrete filled steel tube that becomes spell long joining section, form complete structure.
It is more than exemplary embodiments of the present invention, the enforcement not limited to this of the present invention.
Above-described embodiment is intended merely to become apparent to illustrate that what technical scheme made enumerates, not to the present invention's Limit, protection scope of the present invention is still defined by scope defined in the appended claims.

Claims (10)

1. a kind of four combination concrete filled steel tube inner supporting structures of assembled, go along with sb. to guard him for pattern foundation pit supporting structure or vertical shaft, its feature With: include standard straight support (1) and short circuit directly support (2);Described standard straight support (1) and short circuit directly support (2) and all include four The round steel pipe (3) be arrangeding in parallel, the square arrangement in cross section of four round steel pipe (3);Described standard straight support (1) and short circuit Directly support the two ends of (2), that is, the two ends of four round steel pipe (3) are respectively welded with ring flange (5) and end-plate (10), described flange Described standard straight support (1) and short circuit are directly supportted four round steel pipe (3) closed at both ends of (2), round steel by disk (5) and end-plate (10) It is filled with concrete (4) inside pipe (3);The surrounding of described ring flange (5) and end-plate (10) is provided with bolt hole (6);Institute State the length less than standard straight support for the length that short circuit directly supports (2);Described ring flange (5) and end-plate (10) are interior with round steel pipe (3) It is provided with drawknot dowel (9), whole section of described drawknot dowel (9) is cast in round steel pipe (3) inner concrete (4) between concrete (4) In, its one end is welded with ring flange (5) or end-plate (10);It is provided with the pre- of four square arrangement on described ring flange (5) Box out hole (11), it is corresponding with the central axis of four round steel pipe (3) respectively, pour mouth as concrete;Described standard straight It is provided with tabula (8), described tabula (8) is upper to be reserved and four round steel pipe (3) external diameter identical holes on support (1) length direction; It is welded with polygon between described four round steel pipe (3) and ring flange (5) and end-plate (10) to put more energy into floor (7);Many described marks Collimation supports (1) and short circuit directly supports the ring flange (5) of (2) and end-plate (10) is sequentially connected by bolt, thus constituting assembling Four combination concrete filled steel tube inner supporting structures of formula.
2. four combination concrete filled steel tube inner supporting structures of assembled according to claim 1 it is characterised in that: described Standard straight support (1) have 4 kinds dissimilar, its be respectively length 1m, 2m, the standard component of 3m, 6m;Described short circuit directly supports the length of (2) Degree is less than 1m.
3. four combination concrete filled steel tube inner supporting structures of assembled according to claim 1 it is characterised in that: described Concrete (4) is the super high strength concrete of more than c50, described round steel pipe (3), tabula (8), ring flange (5) and end-plate (10) All using q345 steel.
4. four combination concrete filled steel tube inner supporting structures of assembled according to claim 1 it is characterised in that: described Round steel pipe (3) diameter of section is 180mm-219mm, and round steel pipe (3) wall thickness is 9mm-10mm.
5. four combination concrete filled steel tube inner supporting structures of assembled according to claim 1 it is characterised in that: described When standard straight support (1) length is more than 6m, at every 3m, it is respectively provided with tabula (8), the thickness of tabula (8) is not less than round steel pipe (3) and method The thickness of blue disk (5);Described tabula (8) is quadrangular steel sheets.
6. four combination concrete filled steel tube inner supporting structures of assembled according to claim 1 it is characterised in that: described Bolt hole (6) diameter is not more than the thickness of ring flange (5) and end-plate (10).
7. four combination concrete filled steel tube inner supporting structures of assembled according to claim 1 it is characterised in that: described The thickness of floor (7) of putting more energy into is not less than the thickness of round steel pipe (3) and ring flange (5).
8. four combination concrete filled steel tube inner supporting structures of assembled according to claim 1 it is characterised in that: described Put more energy into floor (7) in the form of groove weld, both sides are respectively welded on round steel pipe (3) and ring flange (5) and end-plate (10); Described ring flange (5) is annular.
9. four combination concrete filled steel tube inner supporting structures of assembled according to claim 1 it is characterised in that: described Round steel pipe (3) external diameter is 180mm, 194mm, 203mm or 219mm, and wall thickness is 9mm or 10mm.
10. four making sides combining concrete filled steel tube inner supporting structures of assembled according to claim 1-9 Arbitrary Term Method it is characterised in that:
Described four combination complete batch production manufactures of each component of concrete filled steel tube inner supporting structure of assembled, can be live quick It is assembled into concrete filled steel tube inner support system, its manufacture method is as follows:
The first step, ring flange (5) and end-plate (10) make:
Ring flange (5) is to connect the important component that different length directly supports, and is also to support overall relatively vulnerable area, its production technology must Accurate bolt hole (6) at bolt connection must be ensured;Wherein ring flange (5) and end-plate (10) lean on round steel pipe (3) side to weld A number of drawknot dowel (9), it is ensured that two sections of straight supports are completely embedded, its main production process is transmission end internal force: under Material, heating, blocking, finish-forging, punching the wad, trimming, quenched, shot-peening, welding dowel, dimension control;Reaching flange through inspection should have Quality of fit as qualified;
Second step, the selection of round steel pipe (3):
Four combination concrete filled steel tube inner supporting structures of assembled adopt the combining form of four small-diameter circular steel pipes (3), little Diameter round steel pipe (3) is hot rolled seamless steel tube, can be in market purchasing;
3rd step, ring flange (5) and end-plate (10) are welded with round steel pipe (3):
On factory's pedestal, ring flange (5) and end-plate (10) are welded to connect with round steel pipe (3) end, and use in end Floor (7) of putting more energy into is strengthened;When standard straight support (1) length is more than 6m, setting tabula (8) at 3m;
4th step, concrete perfusion (4):
It is cast in small-diameter circular steel pipe (3) using the super high strength concrete (4) of more than c50, internal concrete is in three-dimensional Stress, its intensity can be improved.Using vertical method of vibrating, the one end being welded is carried the combination circle of end-plate (10) Steel pipe, end-plate (10) one end stands up down;Strictly press charger sheet mixed concrete, and concrete is reserved along ring flange (5) Hole (11) inwall pours into, and starts vibrator while pouring, closely knit to ensure concreting, is filled into during concrete perfusion With ring flange (5) flush with outer surface and floating.
CN201610924568.1A 2016-10-24 2016-10-24 Assembled type four-combined-round-steel-pipe concrete inner support structure and manufacturing method Pending CN106351235A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109610469A (en) * 2018-11-30 2019-04-12 中铁十六局集团地铁工程有限公司 A kind of support of assembly concrete-filled steel tube and construction method

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Publication number Priority date Publication date Assignee Title
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CN102635118A (en) * 2012-03-26 2012-08-15 北京工业大学 Square steel pipe concrete supporting structure for foundation pit support
CN202626998U (en) * 2011-12-30 2012-12-26 北京工业大学 Square steel tube lightweight concrete purlin for foundation pit protection
CN203530989U (en) * 2013-09-28 2014-04-09 福建工程学院 Deep foundation pit shoring retaining wall steel pipe concrete supporting assembly

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100698878B1 (en) * 2005-12-29 2007-03-22 (주)핸스건설 Y Type Connecting Structure of Steel Pipe Struts
KR20120020671A (en) * 2010-08-30 2012-03-08 주식회사 엠스틸이앤씨 Connector for multi-row steel strut and construction method thereof
CN202626998U (en) * 2011-12-30 2012-12-26 北京工业大学 Square steel tube lightweight concrete purlin for foundation pit protection
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CN203530989U (en) * 2013-09-28 2014-04-09 福建工程学院 Deep foundation pit shoring retaining wall steel pipe concrete supporting assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109610469A (en) * 2018-11-30 2019-04-12 中铁十六局集团地铁工程有限公司 A kind of support of assembly concrete-filled steel tube and construction method

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Application publication date: 20170125