CN202626998U - Square steel tube lightweight concrete purlin for foundation pit protection - Google Patents
Square steel tube lightweight concrete purlin for foundation pit protection Download PDFInfo
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- CN202626998U CN202626998U CN 201120569643 CN201120569643U CN202626998U CN 202626998 U CN202626998 U CN 202626998U CN 201120569643 CN201120569643 CN 201120569643 CN 201120569643 U CN201120569643 U CN 201120569643U CN 202626998 U CN202626998 U CN 202626998U
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- steel pipe
- purlin
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Abstract
The utility model relates to a square steel tube lightweight concrete purlin for foundation pit protection. The purlin consists of a square steel tube, lightweight concrete, an end plate and a support rib. The original steel purlin is replaced by the square steel tube lightweight concrete, steel products are saved and the cost is reduced; the steel tube concrete has no cavity, so that the local rigidity is increased and local deformation is effectively avoided; the end plate is used for sealing and connecting the square steel tube concrete purlin, so that the whole protection structure of the foundation pit has better integrity; and the support rib is used for preventing oversized deformation of the flange plate, so that the service life of the steel tube concrete is prolonged. During construction, an A-frame bracket (small bracket) is firstly erected, then the steel tube lightweight concrete purlin is mounted, finally the steel support is erected, and the steel support is coupled to the purlin through a flange plate, so that the steel support can be prevented from being separated. The square steel tube lightweight concrete purlin is convenient in connection, high in economical efficiency, can be reused, ensures the rigidity, and has great application value.
Description
Technical field
The utility model relates to a kind of square steel pipe light weight concrete construction that is used for subway foundation pit or large-scale Extra-Deep Foundation Pit supporting and encloses purlin.
Background technology
Steel supports and has been widely used in open cut of subway station or the interval deep foundation ditch support system, is requisite construction apparatus in the subway work process, also is the prerequisite key element that guarantees subway work safety.Steel encloses the important component part that purlin is a steel support structure.In subway foundation pit or large-scale Extra-Deep Foundation Pit supporting, it is non-integral mostly that existing steel encloses purlin, and the supporting of whole foundation ditch is independent loose system, has potential safety hazard.To enclose purlin mostly be to be spliced through end plate by two parallel i iron to the steel of prior art in addition, whole rectangular shape, and it is I-shaped that section is, and the riser of I-shaped is a sealed hollow, has the not enough shortcoming of local supporting capacity.Steel enclose the purlin surfaces externally and internally and weld seam many, be easy to corrosion, be not easy to antirust rust cleaning and preservative treatment, be unfavorable for long-term storage, be difficult to repeatedly recycle.
The utility model content
The purpose of the utility model is that a kind of local supporting capacity height, good integrity are provided, can reuse and square steel pipe light weight concrete construction that pattern foundation pit supporting structure that cost is cheap is relatively used encloses purlin.
The technical scheme that the utility model adopts is following:
The square steel pipe light weight concrete construction that a kind of pattern foundation pit supporting structure is used encloses purlin, it is characterized in that: it is to be made up of end plate, ribs, square steel pipe, light weight concrete construction that the square steel pipe light weight concrete construction encloses purlin.Light weight concrete construction is to use light coarse aggregate, coarse sand, and light weight sand, cement and water are formulated, and dried apparent density is not more than 1950kg/m
3, strength grade is that the above structure of LC30 is used light weight concrete construction.It is inner that light weight concrete construction is filled in the Fang Gang pipe; End plate closes is used at the two ends of square steel pipe respectively, and each end plate has outstanding flanged plate on three limits, and another side does not stay flanged plate; Do not stay one side of flanged plate closely connected with foundation pit walls; Be reserved with bolt hole on the flanged plate, the connection of enclosing between the purlin external member connects with bolt through end plate upper flange plate exactly successively, forms the collar tie beam of a circle continuous whole.Be welded with ribs between square steel pipe and the flanged plate, ribs is used for preventing that flanged plate from having bigger distortion, has improved the application life that the square steel pipe light weight concrete construction encloses purlin.
The square steel pipe light weight concrete construction that a kind of pattern foundation pit supporting structure is used encloses purlin, it is characterized in that: enclose the purlin external member and comprise diagonal brace place external member, straight support place external member, corner's short circuit external member and straightway short circuit external member., foundation ditch select external member diagonal brace place external member, straight support place external member, short circuit external member, inner corner trim place external member to splice when not having external corner; , foundation ditch select external member support place external member, straight support place external member, short circuit external member, inner corner trim place external member, external corner place external member to splice when having external corner.
Described inner corner trim and external corner place turning external member are for being the L shaped concrete square steel pipe of light filling, and above-mentioned end plate closes is used at the square steel pipe two ends respectively, is used for foundation ditch corner, is connected with the purlin external member of enclosing of both direction respectively through the flanged plate on the end plate.Described straight support place external member is the concrete square steel pipe of light filling; Above-mentioned end plate closes is used at the square steel pipe two ends respectively, and square steel pipe one face down bonding is connected to rectangular steel plates, and flanged plate is arranged on the steel plate; Be welded with ribs between flanged plate and the square steel pipe, be used for straight support place that steel supports.Described diagonal brace place external member is the concrete square steel pipe of light filling; Above-mentioned end plate closes is used at the square steel pipe two ends respectively; And a face down bonding of square steel pipe one side and tri-prismoid connects, and triangular prism is welded by steel plate, on the side steel plate that wherein tri-prismoid connection steel supports flanged plate is arranged; Be welded with ribs between the opposite side of flanged plate and tri-prismoid, be used for the diagonal brace place that steel supports.Described short circuit external member is the concrete square steel pipe of light filling, and above-mentioned end plate closes is used at the square steel pipe two ends respectively, and length is shorter, plays filling effect, satisfies foundation ditch splicing needs.Straight support pressure-bearing junction plate supports with steel through flanged plate with diagonal brace pressure-bearing junction plate and is connected with bolt.
The square steel pipe light weight concrete construction that a kind of pattern foundation pit supporting structure is used encloses purlin, and the square steel pipe light weight concrete construction encloses purlin and is placed on the A-frame (little bracket).A-frame (little bracket) is connected through expansion bolt with foundation pit walls; Wherein tamp with concrete in the square steel pipe light weight concrete construction space of enclosing between purlin and the foundation pit walls; According to " the base pit engineering inner supporting body is that steel encloses the purlin construction regulations " regulation, must be with the above pea gravel concreten of C30.
The job practices that above-mentioned a kind of square steel pipe light weight concrete construction that is used for the pattern foundation pit supporting structure use encloses purlin is:
The first step: measure setting-out according to design drawing, confirm that the square steel pipe light weight concrete construction encloses the plan-position of purlin and A-frame (little bracket).
Second step: the levelling of foundation pit walls is installed in the good position of setting-out to A-frame (little bracket) then.
The 3rd step: enclose purlin to the square steel pipe light weight concrete construction and be lifted on the A-frame (little bracket), and enclose purlin to each Duan Gang and connect successively through bolt, tamp with the above pea gravel concreten of C30 in the space that steel encloses between purlin and the foundation pit walls.
The 4th step: set up steel and support.
Beneficial effect
It is low that the square steel pipe light weight concrete construction that the utility model is used for pattern foundation pit supporting structure encloses the purlin cost, and good economical benefit, many engineering practical experiences show that concrete filled steel tube compares with steel work, can practice thrift steel about 50%; Good integrity, steel are enclosed between the purlin and are connected into integral body through end plate with bolt, have guaranteed the globality of structure; Local supporting capacity is high, and steel encloses purlin inside and has cavity, and it is concrete that partial pressing's scarce capacity, square steel pipe light weight concrete construction enclose purlin inner, has improved local supporting capacity, has prevented because steel supports the afterburning excessive local distortion of enclosing purlin of causing; It is the short standard component of length that the square steel pipe light weight concrete construction encloses the purlin external member, and single-piece weight is lighter relatively, is convenient to the lifting carrying; The inner concrete of square steel pipe is in closed state, and distortion receives the constraint of square steel pipe and end plate when stressed, has good bending resistance, compressive property.
Enclose purlin external member tubular structure inner surface by isolated with extraneous the contacting of concrete filling, can not corroded or corrosion, external structure is simple, and surface smoothing makes things convenient for derusting rust-proofing, can repeat repeatedly to use, and reduces material consumption, and cost is practiced thrift in energy-conserving and environment-protective.
Description of drawings
Fig. 1, subway station foundation pit supporting construction sketch map
Fig. 2, square steel pipe light weight concrete construction standard paragraphs enclose purlin diagonal brace external member sketch map
Fig. 3, square steel pipe light weight concrete construction standard paragraphs enclose the straight support set spare sketch map of purlin
Fig. 4, square steel pipe light weight concrete construction standard paragraphs enclose purlin short circuit external member sketch map
Fig. 5, square steel pipe light weight concrete construction enclose purlin inner corner trim external member sketch map
Fig. 6, square steel pipe light weight concrete construction enclose purlin external corner external member sketch map
Fig. 7, square steel pipe light weight concrete construction enclose purlin and are connected sketch map with the foundation ditch retaining wall
Fig. 8, square steel pipe light weight concrete construction enclose the purlin cross-sectional view
Among the figure: 1 inner corner trim external member, 2 diagonal brace place pressure-bearing junction plates, 3 diagonal brace external members, 4 short circuit external members, 5 external corner external members, 6 straight support set spare 7 straight support pressure-bearing junction plate 8 end plates 9 ribs 10 bolts hole 11 square steel pipes 12 light weight concrete constructions 13 pea gravel concreten 14 connecting bolts, 15 foundation pit walls, 16 A-frames (little bracket) 17 flanged plates
The specific embodiment
Below through a subway station (end is provided with shield structure well widened section) embodiment, and combine accompanying drawing, the technical scheme of the utility model is further specified.
Choosing the length of side is 600mm; Wall thickness is that steel that the steel pipe light weight concrete construction of 10mm encloses purlin and existing 700 * 300mm encloses purlin and makes comparisons; According to " encased structures design and construction rules " and " base pit engineering support system steel encloses the purlin construction regulations ", the rigidity of enclosing purlin through calculating knowledge steel pipe light weight concrete construction is 4.7 * 10
7Nm
3, what steel enclosed purlin is 4.5 * 10
7Nm
3, know that relatively the rigidity that the square steel pipe light weight concrete construction that is designed encloses purlin is not less than the rigidity that existing steel encloses purlin, satisfies foundation ditch and encloses purlin bending resistance and compressive strength.
Shown in Fig. 1～8, the square steel pipe light weight concrete construction that the utility model patent provides a kind of pattern foundation pit supporting structure to use encloses purlin, is a kind of member that supporting can be provided in the base pit engineering of subway station (end is provided with shield structure well widened section).As shown in Figure 1, the square steel pipe light weight concrete construction encloses the purlin external member and comprises inner corner trim place turning external member 1, and the diagonal brace place encloses purlin external member 3, short circuit external member 4, and external corner place turning external member 5, straight support place external member 6 constitutes.It is as shown in Figure 2 that described diagonal brace place encloses purlin external member 3, encloses to be welded with diagonal brace pressure-bearing junction plate 2 on the purlin, and steel supports through pressure-bearing junction plate 2 transmitter shaft power.Described straight support place external member 6 is as shown in Figure 3, encloses to be welded with straight support pressure-bearing junction plate 7 on the purlin, is used to transmit the steel axial force of the supports.Support bearing plate and be connected through upper flange plate 17, can prevent effectively that the steel support from coming off with horizontal support.Described short circuit external member 4 is as shown in Figure 4, and general length is shorter, cooperates with other external member and satisfies the splicing that different length encloses purlin, a filling effect.Described inner corner trim and external corner place turning external member such as Fig. 5 and shown in Figure 6 are used for foundation ditch corner, and two edge lengths are shorter, and what connect both direction respectively encloses the purlin external member, play the transitional function of corner.Enclosing the purlin external member is made up of end plate 8, ribs 9, square steel pipe 11, light weight concrete construction 12; Wherein light weight concrete construction is by " light aggregate concrete rules " JGJ51-2002 regulation, and light weight concrete construction is to use light coarse aggregate, coarse sand, and light weight sand, cement and water are formulated, and dried apparent density is not more than 1950kg/m
3, strength grade is that the above structure of LC30 is used light weight concrete construction.Square steel pipe is by " encased structures design and construction rules " regulation, and the proportional limit between the steel pipe length of side and the wall thickness is between 20～85.The square steel pipe two ends are with end plate 8 sealings, and its end plates 8 upper flange plates 17 have bolt hole 10, and per two sections square steel pipe light weight concrete construction encloses end plate 8 alignment of purlin external member, are in turn connected to form a circle complete and continuous girder construction with bolt passing through bolt hole 10 enclosing purlin.Ribs 9 is one the pentagon steel plate at three right angles to be arranged, the two wherein long adjacent straight arms of angle and flanged plate and square steel pipe welding, and the ribs of enclosing purlin one end is no less than 6, and it is excessive to prevent flanged plate 17 to be out of shape.As shown in Figure 7, enclose the purlin external member and be placed on the A-frame (little bracket) 16, A-frame (little bracket) 16 is connected with foundation pit walls 15 by expansion bolt 14, and the gap of wherein enclosing between purlin and the foundation pit walls 15 is tamped by pea gravel concreten 13, is beneficial to the transmission of steel axial force of the supports.
The concrete job practices that above-mentioned steel pipe light weight concrete construction encloses purlin is:
The first step: measure setting-out according to design drawing, confirm the plan-position of A-frame (little bracket) 16.
Second step: the levelling of foundation pit walls is fixed on corresponding position to A-frame (little bracket) 16 then.
The 3rd step: enclose the purlin external member to the square steel pipe light weight concrete construction and be lifted on the A-frame (little bracket) 16, do not stay one side of flanged plate 17 closely connected with foundation ditch retaining wall or support.
The 4th step: straight support set spare 6, diagonal brace external member 3, short circuit external member 4 harmonizing yinyang angle short circuit external members 1,5 are installed successively, and the end plate 8 that encloses each section square steel pipe light weight concrete construction purlin connects through bolt successively, forms a complete structure.
The 5th step: tamp the space that the square steel pipe light weight concrete construction encloses between purlin and the foundation pit walls with pea gravel concreten 13, be convenient to the power transmission between steel support and the foundation pit walls.
The 6th step: set up cross binding, support bearing plate and be connected through the upper flange plate with horizontal support.
More than be an exemplary embodiments of the utility model, the enforcement of the utility model is not limited thereto.
Claims (4)
1. the square steel pipe light weight concrete construction used of a pattern foundation pit supporting structure encloses purlin, and it is characterized in that: it is to be made up of end plate (8), ribs (9), square steel pipe (11), light weight concrete construction (12) that the square steel pipe light weight concrete construction encloses purlin; Light weight concrete construction (12) is filled in Fang Gangguan (11) inside; End plate (8) sealing is used at the two ends of square steel pipe (11) respectively; Each end plate has outstanding flanged plate (17) on three limits, another side does not stay flanged plate (17), does not stay one side of flanged plate and foundation pit walls closely connected; Be reserved with bolt hole (10) on the flanged plate (17), be welded with ribs (9) between square steel pipe (11) and the flanged plate (17).
2. the square steel pipe light weight concrete construction that a kind of pattern foundation pit supporting structure according to claim 1 is used encloses purlin, it is characterized in that: the proportional limit between square steel pipe (11) length of side and the wall thickness is between 20～85.
3. the square steel pipe light weight concrete construction that a kind of pattern foundation pit supporting structure according to claim 1 is used encloses purlin, and ribs (9) is one the pentagon steel plate at three right angles to be arranged, the wherein two adjacent straight arms of angle and flanged plate (17) and square steel pipe (11) welding.
4. the square steel pipe light weight concrete construction that a kind of pattern foundation pit supporting structure according to claim 1 is used encloses purlin; It is characterized in that: 5 kinds of dissimilar external members are arranged; Comprise inner corner trim place turning external member (1), external corner place turning external member (5), diagonal brace place external member (3); Straight support place external member (6) and short circuit external member (4) select external member (1), (3), (4), (6) to splice when foundation ditch does not have external corner; , foundation ditch select external member (1), (3), (4), (5), (6) to splice when having external corner; Described inner corner trim and external corner place turning external member are the L shaped concrete square steel pipe of light filling, and above-mentioned end plate (8) sealing is used at the square steel pipe two ends respectively; Described straight support place external member (6) is the concrete square steel pipe of light filling; Above-mentioned end plate (8) sealing is used at the square steel pipe two ends respectively; And square steel pipe one face down bonding is connected to rectangular steel plates, and flanged plate (17) is arranged on the steel plate, is welded with ribs (9) between flanged plate and the square steel pipe; Described diagonal brace place external member (3) is the concrete square steel pipe of light filling; Above-mentioned end plate (8) sealing is used at the square steel pipe two ends respectively; And a face down bonding of square steel pipe one side and tri-prismoid connects; Triangular prism is welded by steel plate, on the side steel plate that wherein tri-prismoid connection steel supports flanged plate (17) is arranged, and is welded with ribs (9) between the opposite side of flanged plate and tri-prismoid; Described short circuit external member (4) is the concrete square steel pipe of light filling, and above-mentioned end plate (8) sealing is used at the square steel pipe two ends respectively; Straight support pressure-bearing junction plate (7) supports with steel through flanged plate (17) with diagonal brace pressure-bearing junction plate (2) and is connected with bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120569643 CN202626998U (en) | 2011-12-30 | 2011-12-30 | Square steel tube lightweight concrete purlin for foundation pit protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120569643 CN202626998U (en) | 2011-12-30 | 2011-12-30 | Square steel tube lightweight concrete purlin for foundation pit protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202626998U true CN202626998U (en) | 2012-12-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120569643 Expired - Fee Related CN202626998U (en) | 2011-12-30 | 2011-12-30 | Square steel tube lightweight concrete purlin for foundation pit protection |
Country Status (1)
| Country | Link |
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| CN (1) | CN202626998U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102535478A (en) * | 2011-12-30 | 2012-07-04 | 北京工业大学 | Enclosing purlin comprising square steel pipe and light concrete for supporting foundation pit |
| CN103046555A (en) * | 2013-01-17 | 2013-04-17 | 华东建筑设计研究院有限公司 | Bidirectional adjustable integration cruciform-joint joints for steel pipe bracing |
| CN103088829A (en) * | 2013-01-30 | 2013-05-08 | 上海城建市政工程（集团）有限公司 | Construction method of concrete support in foundation pit |
| CN106351234A (en) * | 2016-10-24 | 2017-01-25 | 北京工业大学 | Assembled type three-combined-round-steel-pipe concrete inner support structure and manufacturing method |
| CN106351235A (en) * | 2016-10-24 | 2017-01-25 | 北京工业大学 | Assembled type four-combined-round-steel-pipe concrete inner support structure and manufacturing method |
-
2011
- 2011-12-30 CN CN 201120569643 patent/CN202626998U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102535478A (en) * | 2011-12-30 | 2012-07-04 | 北京工业大学 | Enclosing purlin comprising square steel pipe and light concrete for supporting foundation pit |
| CN102535478B (en) * | 2011-12-30 | 2014-07-16 | 北京工业大学 | Enclosing purlin comprising square steel pipe and light concrete for supporting foundation pit |
| CN103046555A (en) * | 2013-01-17 | 2013-04-17 | 华东建筑设计研究院有限公司 | Bidirectional adjustable integration cruciform-joint joints for steel pipe bracing |
| CN103088829A (en) * | 2013-01-30 | 2013-05-08 | 上海城建市政工程（集团）有限公司 | Construction method of concrete support in foundation pit |
| CN103088829B (en) * | 2013-01-30 | 2015-08-26 | 上海城建市政工程（集团）有限公司 | The construction method that in a kind of foundation ditch, concrete supports |
| CN106351234A (en) * | 2016-10-24 | 2017-01-25 | 北京工业大学 | Assembled type three-combined-round-steel-pipe concrete inner support structure and manufacturing method |
| CN106351235A (en) * | 2016-10-24 | 2017-01-25 | 北京工业大学 | Assembled type four-combined-round-steel-pipe concrete inner support structure and manufacturing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121226 Termination date: 20131230 |