CN208633120U - A kind of pattern foundation pit supporting structure assembled concrete-filled rectangular steel tube diagonal brace - Google Patents
A kind of pattern foundation pit supporting structure assembled concrete-filled rectangular steel tube diagonal brace Download PDFInfo
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- CN208633120U CN208633120U CN201821352112.3U CN201821352112U CN208633120U CN 208633120 U CN208633120 U CN 208633120U CN 201821352112 U CN201821352112 U CN 201821352112U CN 208633120 U CN208633120 U CN 208633120U
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- diagonal brace
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Abstract
The utility model relates to a kind of pattern foundation pit supporting structure assembled concrete-filled rectangular steel tube diagonal braces, including being successively detachably fixed together the main paragraph formed by several straight section units, and it is removably fixed on the bearing diagonal section at the main paragraph both ends, curved supporting section respectively, the straight section unit, bearing diagonal section and curved supporting section include the intermediate steel pipe filled with concrete, and sealing is fixed in the flanged plate at intermediate steel pipe both ends.Each section is detachably fixed together by the utility model, ensure that the globality of structure, and can satisfy a variety of support distances requirements；Each Duan Kewei factory-made component, is easy to lift carrying, and reusable；The concrete of steel duct is in closed state, and constraint of the deformation by steel pipe and both ends flanged plate, has good bending resistance, compressive property when stress；Steel duct surface not will receive corrosion or corrosion, extended service life, saved cost by concrete filling isolation and extraneous contact.
Description
Technical field
The utility model relates to Base hole supporting technology field more particularly to a kind of foundation pit diagonal brace systems, specially
A kind of pattern foundation pit supporting structure assembled concrete-filled rectangular steel tube diagonal brace.
Background technique
Pattern foundation pit supporting structure belongs to independent support system, and in pattern foundation pit supporting structure field, there are two types of common support patterns, horizontal
Support and anchor support is drawn, but two ways equal Shortcomings in practical applications.
With the gradually quickening of Urbanization in China, the development and utilization of the underground space are rapidly developed, base pit engineering
Increasing, cutting depth is also deeper and deeper.Since the distance between building is increasingly closer, it is red that anchor pole often stretches out design
Line impacts adjacent building, therefore makes the limitation for drawing anchor support to be more affected by surrounding enviroment, and base pit engineering is often
Common pile-anchor retaining can not be used.And increasing due to horizontally-supported column quantity in support system is supported, seriously interfere the earthwork
Excavation and structure construction, and horizontally-supported support cost is higher.
There is cast-type diagonal brace structure, although making earth excavation in continuous research with people to support system
It is convenient, but cast-type diagonal brace is unfavorable for that environmental protection, speed of application is slow, removes that difficult, support cost is high, and diagonal brace after the completion of constructing
It can not continue to use, greatly waste resource, further increase cost.
Utility model content
It is oblique with assembled concrete-filled rectangular steel tube that in view of the shortcomings of the prior art, the utility model provides a kind of pattern foundation pit supporting structures
Support, is divided into several separate units, reusable, and can be prefabricated, improves speed of application.
The utility model is achieved by the following technical solution, and it is mixed to provide a kind of pattern foundation pit supporting structure assembled rectangular steel pipe
Solidifying soil diagonal brace, including being successively detachably fixed together the main paragraph formed by several straight section units, and it is detachable solid respectively
It is connected to the bearing diagonal section at the main paragraph both ends, curved supporting section, the straight section unit, bearing diagonal section and curved supporting section include filling out
Intermediate steel pipe filled with concrete, and sealing are fixed in the flanged plate at intermediate steel pipe both ends.
Diagonal brace is divided into bearing diagonal section, curved supporting section and several straight section units by this programme, and is removably fixed in one
It rises, is connect with base steel plates, crown beam using bearing diagonal section, curved supporting section when supporting, after supporting, each section is torn open respectively
It opens, can be used for the use of next engineering section, since bearing diagonal section, curved supporting section and straight section unit can be prefabricated, without existing
Field casting, not only increases speed of application, and avoids environmental pollution caused by casting, while the straight section unit of this programme,
Bearing diagonal section and curved support segment structure are simple, low manufacture cost, while enhancing rigidity, extend the service life of diagonal brace.
As optimization, the intermediate steel pipe on the curved supporting section includes the pipe I coaxial with main paragraph, and with the pipe I
The pipe II that angle is 135 °~150 °.When in use, pipe II is connect this prioritization scheme with crown beam, and pipe I is connect with main paragraph, makes to lead
Body section, curved supporting section and crown beam three parts fit closely, to make the transmission more reliable of power, the angle setting of pipe I and pipe II is not
Diagonal brace outreach is only reduced, and can satisfy the support requirement of greater level component.
Further, end face of the intermediate steel pipe in the bearing diagonal section far from main paragraph is parallel with the pipe II.This is excellent
Change scheme when in use, can make pipe II be located at upper end and be in horizontality, the lower end surface of bearing diagonal section is similarly in level
State, maximum with the contact area of base steel plates, the reliability of support is stronger.
As optimization, end face of the intermediate steel pipe far from main paragraph in the bearing diagonal section and main paragraph angle be 30 °~
45°.The setting of this prioritization scheme not only reduces diagonal brace outreach, and the support that can satisfy greater level component is wanted
It asks.
As optimization, the straight section unit includes several standard paragraphs and is shorted section, and the length for being shorted section is less than standard
Segment length.The setting of this prioritization scheme can carry out standard paragraphs according to actual support distances and be shorted the combination of segment number, full
The requirement of a variety of support distances of foot.
As optimization, it is described it is detachable it is affixed refer to be bolted to connection, offer bolt hole on the flanged plate.
This programme is linked together each section using bolt, and installation and removal are very convenient, and may be reused, and is further saved
Support cost is saved.
As optimization, ribbed stiffener is installed between the outer wall and flanged plate of the intermediate steel pipe.It can by setting ribbed stiffener
It prevents flanged plate from having moderate finite deformation, and improves the service life of concrete filled steel tube diagonal brace.
The utility model has the following beneficial effects: each section is detachably fixed together, fabricated construction is realized, ensure that
The globality of structure, and can satisfy a variety of support distances requirements；Straight section unit, bearing diagonal section and curved supporting section can be pre- for factory
Component processed is easy to lift carrying, and reusable；The concrete of steel duct is in closed state, when stress deformation by
To the constraint of steel pipe and both ends flanged plate, there is good bending resistance, compressive property；Steel duct surface is completely cut off by concrete filling
With extraneous contact, it not will receive corrosion or corrosion, extend service life, saved cost.
Detailed description of the invention
FIG. 1 is a schematic structural view of the utility model；
Fig. 2 is standard paragraphs structural schematic diagram；
Fig. 3 is the utility model junction schematic cross-section；
Fig. 4 is to be shorted segment structure schematic diagram；
Fig. 5 is curved supporting section structural schematic diagram；
Fig. 6 is bearing diagonal segment structure schematic diagram；
Fig. 7 is simply supported beam computation model；
It is as shown in the figure:
1, crown beam, 2, support pile, 3, standard paragraphs, 4, short circuit section, 5, curved supporting section, 6, bearing diagonal section, 7, base steel plates, 8,
Support stake, 9, flanged plate, 10, bolt hole, 11, intermediate steel pipe, 12, concrete, 13, ribbed stiffener.
Specific embodiment
In order to clarify the technical characteristics of the invention, being illustrated below by specific embodiment to this programme.
A kind of pattern foundation pit supporting structure assembled concrete-filled rectangular steel tube diagonal brace as shown in Figure 1, including by several straight section units according to
It is secondary to be bolted to connection the main paragraph formed together, and be bolted to connection respectively in the main paragraph both ends
Bearing diagonal section 6, curved supporting section 5, the straight section unit, bearing diagonal section 6 and curved supporting section 5 include filled with concrete 12
Intermediate steel pipe 11, and sealing are fixed in the flanged plate 9 at intermediate 11 both ends of steel pipe, offer bolt hole 10 on flanged plate 9, intermediate
Ribbed stiffener 13 is installed between the outer wall and flanged plate 9 of steel pipe 11.
Straight section unit includes several standard paragraphs 3 and is shorted section 4, and the length for being shorted section is less than standard segment length, actual use
When according to supporting distance carry out standard paragraphs 3 and be shorted 4 quantity of section selection, the requirement of some support distance can be met.
Intermediate steel pipe on curved supporting section 5 includes the pipe I coaxial with main paragraph, and with I angle of pipe is 135 °
Pipe II.End face of the intermediate steel pipe far from main paragraph and main paragraph angle in bearing diagonal section are 45 °, the centre in bearing diagonal section 6
End face of the steel pipe far from main paragraph is parallel with the pipe II.
Concrete 12 in the present embodiment is formulated with light coarse aggregate, light weight sand, coarse sand, cement and water, is done apparent close
Degree is not more than 1950kg/m3, and strength grade is the structure lightweight concrete of LC30 or more.Steel pipe is rectangular steel pipe, and rectangle
Ratio between steel pipe side length and wall thickness is between 20~85.
The specific implementation method of pattern foundation pit supporting structure is carried out using this diagonal brace are as follows:
It determines between diagonal brace and crown beam 1, connect between diagonal brace and base steel plates 7 and between each section of diagonal brace step 1: calculating
The diameter d of connecting bolt.
Assuming that hole depth is H, diagonal brace and hole bottom angle are α, then diagonal brace length isDiagonal brace horizontal direction projected length isClassical analytic method, earth resistance method and FInite Element can be used in the calculating of horizontal force T suffered by foundation pit diagonal brace
The methods of.Axle power F suffered by diagonal brace meets Fcos α=T.Diagonal brace can be reduced to simply supported beam, as shown in Figure 7.
Wherein q is concrete filled steel tube bulk density.The shearing at diagonal brace both ends isIt is set according to plain bolt shear resistance capacity
Evaluation formula meets:
In formula: nvTo be cut face number, d is bolt shank diameter,For the shearing strength design value of bolt.
Shearing at arbitrary section x isIt must meet:
It can be checked in from " Code for design of steel structures " (GB50017-2003).
Bolt minimum diameter d at arbitrary section can be found out according to formula (1), is metAccordingly may be used
Determine corresponding bolt model.
Support pile and the bolt of crown beam junction calculate:
Horizontal force suffered by diagonal brace and the difference for cheating outer soil pressure are V.Equally, meet
The bolt minimum diameter d of support pile Yu crown beam junction can be found out according to formula (2), met
It can determine corresponding bolt model accordingly.
Step 2: performing support pile 2, prefabricated rectangle concrete filled steel tube crown beam, basic steel according to design drawing surveying and locating
Plate and support stake.The counterforce device of bottom of foundation ditch is using support stake 8 (using structure pile, can also separately set) and base steel plates
7 are welded to connect, and are all made of flanged plate between other components and bolt is attached.
Step 3: first bearing diagonal section 6 is bolted with base steel plates 7 by connection, then in mounted bearing diagonal
Successively using being bolted installation standard paragraphs 3 and be shorted section 4 in section 6, finally by connection bolt by curved supporting section 5 and crown beam 1
Connection, forms complete diagonal brace, easy for construction, good in economic efficiency, is connected between difference segmentation by flanged plate whole
Body ensure that the globality of structure.
Certainly, above description is also not limited to the example above, and technical characteristic of the utility model without description can lead to
It crosses or realizes that details are not described herein using the prior art；Above embodiments and attached drawing are merely to illustrate the technology of the utility model
Scheme is not limitations of the present invention, and the utility model is described in detail referring to preferred embodiment, this
Field it is to be appreciated by one skilled in the art that those skilled in the art institute in the essential scope of the utility model
The variations, modifications, additions or substitutions made without departure from the objective of the utility model, want by the right that also should belong to the utility model
Seek protection scope.
Claims (7)
1. a kind of pattern foundation pit supporting structure assembled concrete-filled rectangular steel tube diagonal brace, it is characterised in that: including by several straight section units according to
The secondary main paragraph to be formed that is detachably fixed together, and it is removably fixed on the bearing diagonal section at the main paragraph both ends respectively
(6), curved supporting section (5), the straight section unit, bearing diagonal section (6) and curved supporting section (5) include filled with concrete (12)
Intermediate steel pipe (11), and sealing are fixed in the flanged plate (9) at intermediate steel pipe (11) both ends.
2. a kind of pattern foundation pit supporting structure according to claim 1 assembled concrete-filled rectangular steel tube diagonal brace, it is characterised in that: institute
Stating the intermediate steel pipe on curved supporting section (5) includes the pipe I coaxial with main paragraph, and with I angle of pipe is 135 ° ~ 150 °
Pipe II.
3. a kind of pattern foundation pit supporting structure according to claim 2 assembled concrete-filled rectangular steel tube diagonal brace, it is characterised in that: institute
It is parallel with the pipe II to state end face of the intermediate steel pipe on bearing diagonal section (6) far from main paragraph.
4. a kind of pattern foundation pit supporting structure according to claim 1 assembled concrete-filled rectangular steel tube diagonal brace, it is characterised in that: institute
Stating end face of the intermediate steel pipe far from main paragraph in bearing diagonal section and main paragraph angle is 30 ° ~ 45 °.
5. a kind of pattern foundation pit supporting structure according to claim 1 assembled concrete-filled rectangular steel tube diagonal brace, it is characterised in that: institute
It states straight section unit to include several standard paragraphs (3) and be shorted section (4), the length for being shorted section is less than standard segment length.
6. a kind of pattern foundation pit supporting structure according to claim 1 assembled concrete-filled rectangular steel tube diagonal brace, it is characterised in that: institute
State it is detachable it is affixed refer to be bolted to connection, offer bolt hole (10) on the flanged plate (9).
7. described in any item a kind of pattern foundation pit supporting structures assembled concrete-filled rectangular steel tube diagonal brace according to claim 1 ~ 6, special
Sign is: being installed with ribbed stiffener (13) between the outer wall and flanged plate (9) of the intermediate steel pipe (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821352112.3U CN208633120U (en) | 2018-08-21 | 2018-08-21 | A kind of pattern foundation pit supporting structure assembled concrete-filled rectangular steel tube diagonal brace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821352112.3U CN208633120U (en) | 2018-08-21 | 2018-08-21 | A kind of pattern foundation pit supporting structure assembled concrete-filled rectangular steel tube diagonal brace |
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| Publication Number | Publication Date |
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| CN208633120U true CN208633120U (en) | 2019-03-22 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108951657A (en) * | 2018-08-21 | 2018-12-07 | 山东正元建设工程有限责任公司 | A kind of pattern foundation pit supporting structure assembled concrete-filled rectangular steel tube diagonal brace |
| CN111324924A (en) * | 2020-02-14 | 2020-06-23 | 中铁二院工程集团有限责任公司 | Existing pile supporting and retaining structure service state quantitative evaluation method based on reliability |
-
2018
- 2018-08-21 CN CN201821352112.3U patent/CN208633120U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108951657A (en) * | 2018-08-21 | 2018-12-07 | 山东正元建设工程有限责任公司 | A kind of pattern foundation pit supporting structure assembled concrete-filled rectangular steel tube diagonal brace |
| CN111324924A (en) * | 2020-02-14 | 2020-06-23 | 中铁二院工程集团有限责任公司 | Existing pile supporting and retaining structure service state quantitative evaluation method based on reliability |
| CN111324924B (en) * | 2020-02-14 | 2022-07-01 | 中铁二院工程集团有限责任公司 | Existing pile supporting and retaining structure service state quantitative evaluation method based on reliability |
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