CN207512747U - A kind of modularization foundation pit steel truss support structure - Google Patents
A kind of modularization foundation pit steel truss support structure Download PDFInfo
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- CN207512747U CN207512747U CN201721188992.0U CN201721188992U CN207512747U CN 207512747 U CN207512747 U CN 207512747U CN 201721188992 U CN201721188992 U CN 201721188992U CN 207512747 U CN207512747 U CN 207512747U
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 46
- 239000010959 steel Substances 0.000 title claims abstract description 46
- 239000003351 stiffener Substances 0.000 claims description 6
- 238000005452 bending Methods 0.000 abstract description 15
- 238000009434 installation Methods 0.000 abstract description 5
- 238000004064 recycling Methods 0.000 abstract description 5
- 238000010276 construction Methods 0.000 description 21
- 239000002689 soil Substances 0.000 description 15
- 230000000694 effects Effects 0.000 description 14
- 230000032258 transport Effects 0.000 description 7
- 238000009412 basement excavation Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 210000001015 abdomen Anatomy 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 210000002784 stomach Anatomy 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model discloses a kind of modularization foundation pit steel truss support structures.Modularization foundation pit steel truss support structure is made of single or plurality of rows of truss structural, truss structural includes basic structural unit and edge member, truss structural is mainly spliced by basic structural unit, and the basic structural unit positioned at truss structural edges at two ends is connect with edge member；Truss structural is spliced to form by multiple basic structural units along a row, is connected between two neighboring basic structural unit by intermediate connecting node, and the basic structural unit at both ends is connected by end connecting node with edge member after splicing；Basic structural unit is made of two chord members and a diagonal web member, two chord member parallel arrangements, is connected to form one between two chord members by diagonal web member.The utility model has the loading characteristic that flexural capacity is big, bending stiffness is big, while has the characteristics that basic structure uniform specification, versatile, high recycling rate, is easy to transport and in-site installation.
Description
Technical field
The utility model is related to structural engineering technical field more particularly to a kind of modularization foundation pit steel truss supports
Structure.
Background technology
In Excavation Process, the support construction in foundation pit plays an important role the stability for keeping foundation pit.It passes
The foundation pit support construction of system uses reinforced concrete structure, and this structure is with speed of application is slow, curing time is long and the later stage needs
The shortcomings of removing unfavorable energy conservation and environmental protection.In contrast, the steel support structure occurred in recent years, generally with easy for construction, fast
Degree is fast, can apply prestressing force, repeatable the advantages that utilizing, and meets the idea of development of national energy-saving environmental protection.
For foundation pit support construction, there should be good structural behaviour first, to ensure the steady of foundation pit supporting system
It is qualitative, the stringent horizontal displacement for controlling foundation pit enclosure wall, the safety and place of protection surrounding built construction object, road and buried pipe
The stability of cable；The area of plane is reduced under the conditions of possible simultaneously, is the basis and underground of proposed earth excavation, building
Accessible construction space as big as possible is created in the construction of room, and what the building machinery for facilitating access for foundation pit can be freely construct
Operation.Existing foundation pit steel support structure also has the problem of certain, for example steel pipe support technology is intensive there are horizontal layout, section
The problems such as point poor performance, although the joint behavior of shaped steel combination support construction makes moderate progress, the problem of horizontal layout is intensive, is simultaneously
It is not well solved.
Although from the point of view of life cycle management is used, bracing members have repeatable utilize, and the steel of waste and old component can return
It receives, for producing new structural member, but due to the diversity of foundation pit form, it usually needs different structures is customized according to different situations
Part form and specification, and the price of steel is relatively high, this so that the early investment of foundation pit steel support structure is huge, partial component
Utilization rate is low, this seriously affects it and promotes the use of；For the flat side of foundation pit, the soil pressure of margin of foundation pit is inwardly formed
As soon as the pressure effect of approaches uniformity distribution, this proposes the anti-bending strength of the support construction in foundation pit very high requirement.
Therefore, the prior art lacks a kind of versatile, high recycling rate and can provide the foundation pit support construction of good anti-bending strength.
Utility model content
The functional characteristics of foundation pit support construction and the range of vehicle transport size are considered, with reference to the stress of steel truss structure
Characteristic, the utility model provide a kind of modularization foundation pit steel truss support structure, and using uniform specification, form is simple, meets
The basic structural unit of vehicle transport size requirement forms empty stomach Plane Steel Truss by on-site consolidation, utilizes truss knot
The superior anti-bending strength of structure, to resist the effect of the soil lateral pressure of margin of foundation pit.Meanwhile purlin can be utilized in the construction process
Gap between two chord member of frame carries out the operations such as pit earthwork excavation.
To achieve the above object, the utility model is using following technical solution：
The steel truss support structure is made of single or plurality of rows of truss structural, and truss structural includes
Basic structural unit and edge member, truss structural is mainly spliced by basic structural unit, positioned at plane girder
The basic structural unit of structure edges at two ends is connect with edge member, and edge member is connected with the other structures of foundation pit.
Herein, the other structures of foundation pit refer to be located at the steel truss support structure both sides and with the steel truss support knot
Structure is connected, provides the structure constrained perpendicular to margin of foundation pit direction for the steel truss support structure, be specifically as follows with it is described
Steel truss support structure it is vertical across two relative edge of foundation pit to support structure, perpendicular to the foundation pit of the steel truss support structure
Be connected side steel truss support structure and positioned at diagonally disposed inclined support structure of foundation pit corner positions etc..
The steel truss support structure is spliced to form by multiple basic structural units along a row, two neighboring basic structure
It is connected between unit by intermediate connecting node, the basic structural unit at truss structure both ends passes through end connecting node after splicing
It is connected with edge member.
The basic structural unit itself is truss structure.
The edge member itself is both ends with end plate, I-shaped cross-section component of the centre with ribbed stiffener.
All components in the steel truss support structure are made of Steel material.
The basic structural unit is made of two chord members and a diagonal web member, two chord member parallel arrangements, two chord members
Between be connected to form one by diagonal web member, two chord members directly use solder design with diagonal web member.
In the basic structural unit, the both ends of two chord members are respectively and fixedly provided with end plate, and end plate is located remotely from diagonal web member
Side is concordant on the outside of the edge of a wing of chord member, to facilitate the company for connecting and forming with purlin between multiple rows of truss structure phase platoon
It connects, end plate extends beyond the edge of a wing of chord member, and connected between extended segment and the edge of a wing of chord member in the side close to diagonal web member
There is ribbed stiffener.
Multiple rows of truss structural is bolted by multiple single truss structurals, specific adjacent two rows of institutes
Stating the connection between truss structural is inter-connected via a bolt joint between the edge of a wing of the two chord member.
The edge of a wing of the chord member is connected by bolt with the purlin on foundation pit periphery, and bears its dead weight by setting bracket
Load.
The end plate of the two chord member is connected with each other by intermediate connecting node between two adjacent basic structural units, institute
The intermediate connecting node stated is bolt connection node, is bolted between the end plate of two basic structural units.
By end connecting node by the end plate of chord member and edge structure between the basic structural unit and edge member
The edge of a wing of part is connected with each other, and the end connecting node is bolt connection node, the end plate of basic structural unit and edge structure
It is bolted between part.
The steel truss support structure can make support construction in foundation pit, under the effect of margin of foundation pit soil pressure, mainly
Bear the effect of moment of flexure.
Intermediate connecting node between the adjacent basic structural unit of the utility model is axial according to its bearing capacity and chord member
The strong method such as bearing capacity determines, ensures end plate by welding ribbed stiffener method in end plate and the chord member weld of chord member
Local stability.
The chord member ala lateralis listrium of adjacent row truss structure is connected by bolt between single truss structural, is formed
Multiple rows of truss structural.When multiple rows of truss is combined, the length between difference row's truss can be identical, can also only exist
Moment of flexure large area uses multiple rows of truss.
The bolts connection Transfer of Shear between different row's truss structures in the utility model, the design of connection according to
Shear-carrying capacity is checked.
The edge member of the utility model can be connected with the other components of foundation pit.
The geometric dimension of the basic structural unit of the utility model, meet pit earthwork excavation construction needs and truss by
Under conditions of curved bearing capacity, the conveyor width limit value of vehicle should be met.
The steel truss support structure of the utility model has excellent anti-bending strength, and internal component is sparse, structure type letter
It is single, the soil lateral pressure that as support construction, can play the role of resisting margin of foundation pit is arranged in foundation pit.
The utility model is mainly assembled by several identical basic structural units, and is distinguished in both sides of the edge position
Steel truss structure is connected to form with edge member, realizes modularization, there is versatile, high recycling rate.And
And resist the effect of margin of foundation pit earth lateral pressure using the good flexural capacity of truss structure, bending stiffness.
When using support construction of the bracing members as foundation pit, for be positioned across foundation pit opposite side two transverse brace structures it
Between, between stull and angle brace, between two angle braces and positioned at stull or angle brace and the margin of foundation pit of vertical direction it
Between flat segments for, existing structure often directly using purlin, using prestressing force domes and prestressing force fish-bellied type knot
Structure bears the effect of the soil pressure of margin of foundation pit (perpendicular to margin of foundation pit).Under the action of soil pressure, the branch of this position
Support structure is primarily subjected to the effect of moment of flexure.Since the anti-bending strength of purlin in itself is poor, when directly use purlin when it is straight
The span on side must be sufficiently small.And prestressing force domes are since structure type is complex, form and design parameter (such as across
Degree, rise etc.) correlation is big and closely related with the connection structure at arch springing, therefore versatility is not strong, it needs for not
Same situation designs and makes corresponding structure.Prestressing force fish-bellied type structure is winded up cable wire by tensioning, by cable wire to fish belly
The thrust of inner column resists the effect of margin of foundation pit soil pressure, although higher due to can theoretically be obtained using strand spiral rope
Bending bearing capacity, but the deformation due to fish-bellied type structure and cable wire axis stiffness relevance are big, and pre- under normal circumstances
Stress cable wire section it is smaller, therefore the bending stiffness of total is smaller, so its applicable span is relatively limited, and steel
Cable stretching is more demanding, and construction is complex.Steel truss is a kind of outstanding by kinking structure, is formed using the xial feed of chord member
Couple resist torque, while resist shearing using the axially loaded of diagonal web member, have that bending stiffness is big, flexural capacity is high
The features such as, it is widely used in all kinds of structures by kinking.But in order to obtain excellent anti-bending strength, truss structure is usually cut
Face size is larger, this brings very big trouble to the transport and installation of the foundation pit steel support structure for needing to reuse.This reality
With novel structure using modular mode, consider the width limitation of haulage vehicle, utilize identical basic structure list
First and a small amount of edge member is connected by the bolt at scene, forms truss structure.It had both solved transport in this way and installation is asked
Topic, and the excellent flexural property of truss structure can be utilized, while can be according to the big ditty of practical span and soil pressure
The number of rows and arrangement of whole truss, have the characteristics that versatile, high recycling rate, can greatly reduce foundation pit steel support structure
Front capital input.
The utility model has the advantage that compared with prior art：
1) splicing assembling, the composition truss knot that flexural capacity is big, bending stiffness is big are carried out using basic structural unit
Structure can be effective against the effect of margin of foundation pit soil pressure.
2) basic structural unit form is simple, uniform specification, can be to avoid component form and the diversity of specification, versatility
By force, high recycling rate can greatly reduce a large amount of early investments of steel support structure, effectively reduce cost；
3) clear space inside the truss structure that composition is formed is big, is conducive to the excavation construction of pit earthwork and other
Constructing operation；
4) size of basic structural unit meets transport vehicle transports width, can effectively improve conevying efficiency, reduces object
Flow cost；
5) single or multiple rows of truss structure can be formed, meets different foundation pit bearing requirements and span requirement, it can root
Single or multiple rows of truss structure, strong applicability are formed according to the size of foundation pit soil pressure and the span flexible assembling of truss.
For synthesis, the utility model has the loading characteristic that flexural capacity is big, bending stiffness is big, while has base
This structure and specification is unified, form is simple, is easy to the features such as transport and in-site installation.
Description of the drawings
Fig. 1 is the floor map of the modularization foundation pit steel truss support structure (single) of the utility model.
Fig. 2 is the floor map of the modularization foundation pit steel truss support structure (two rows) of the utility model.
Fig. 3 (a) is the plan view of basic structural unit；3 (b) is the stereogram of basic structural unit.
Fig. 4 is the vertical view of basic structural unit.
Fig. 5 is the side view of basic structural unit.
Fig. 6 is the plan view of edge member.
Fig. 7 is the side view of edge member.
Fig. 8 is the assembled schematic diagram of the modularization foundation pit steel truss support structure of the utility model.
Fig. 9 builds the scheme of installation in foundation pit for the utility model structure.
In figure：Basic structural unit 1, edge member 2, intermediate connecting node 3, end connecting node 4, bolt 5, chord member 6,
End plate 61, ribbed stiffener 62, diagonal web member 7.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples.
As shown in Figure 1, the utility model includes single or plurality of rows of truss structural, truss structural includes base
This structural unit 1 and edge member 2, truss structural is mainly spliced by basic structural unit 1, positioned at plane girder
The basic structural unit of structure edges at two ends is connect with edge member 2, and edge member 2 is connected with foundation pit support construction.
Truss structural is spliced to form by multiple basic structural units 1 along a row, two neighboring basic structural unit 1 it
Between connected by intermediate connecting node 3, the basic structural unit 1 at both ends passes through end connecting node 4 and edge member 2 after splicing
Connection.
As shown in Fig. 3 (a), Fig. 3 (b), Fig. 4-5, basic structural unit 1 is made of two 6 and one diagonal web members 7 of chord member, and two
Root chord member 6 is arranged in parallel, and is connected to form one between two chord members 6 by diagonal web member 7, and 7 both ends of diagonal web member are by being welded to connect
Onto the edge of a wing of chord member 6.
In basic structural unit 1, the both ends of two chord members 6 are respectively and fixedly provided with end plate 61, and diagonal web member 7 is located remotely from end plate 61
Side it is concordant with the edge of a wing of chord member 6, connect and the connection of multiple rows of truss structure, be located on end plate 61 close with purlin with facilitating
The side of diagonal web member 7 extends beyond the edge of a wing of chord member 6, and ribbed stiffener 62 is connected between extended segment and the edge of a wing of chord member 6,
In this way under soil pressure effect, moment of flexure can be transmitted during tension on the inside of chord member, basically reaches rigidly connected effect.
As shown in Figure 6 and Figure 7, in specific implementation, open up bolt hole on the end plate 61 at 6 both ends of chord member, each chord member 6 it is outer
Also bolt hole is opened up on side wing edge, bolt hole is opened up on the edge of a wing of edge member 2.
As shown in Fig. 2, multiple rows of truss structural is bolted by multiple single truss structurals, specifically
Connection between the adjacent two rows truss structural is to be connected with each other between the edge of a wing of the two chord member 6 by bolt 5, most
After build as shown in Figure 8.
61 phase of end plate of the two chord member is interconnected by intermediate connecting node 3 between two adjacent basic structural units 1
It connects, is bolted between the end plate 61 of two basic structural units 1 so that two strings in multiple basic structural units 1
Bar is respectively connected with straight line.In specific implementation, two pieces of centres of the lower flange range on chord member of end plate 61 being connected
It is connected between section, and extends in two pieces of end plates being connected 61 and also to be connected with bolt between the extended segment outside chord member
It connects so that intermediate connecting node 3 forms unilateral extended end-plate connections.
By end connecting node 4 by the end plate 61 and edge member of chord member between basic structural unit 1 and edge member 2
2 are connected with each other, and end connecting node 4 is bolt connection node, lead between the end plate 61 of basic structural unit 1 and edge member 2
It crosses and is bolted.In specific implementation, end plate 61 is located on chord member to be used between 2 edge of a wing of the interlude of lower flange range and edge member
Be bolted, and end plate 61 extend 2 edge of a wing of extended segment and edge member outside chord member between be also connected with so that in
Between connecting node 3 form asymmetric bolt connection node.
It can be seen that the utility model resists foundation pit using the good flexural capacity of truss structure, bending stiffness
The effect of edge earth lateral pressure.
The utility model structure is built after being connected to foundation pit, the edge of a wing of chord member 6 passes through bolt and the purlin on foundation pit periphery
It is connected, and the dead weight of support construction is born using bracket.
Wherein as the basic structural unit unity of form of basic module, a large amount of early investment can be saved；Basic unit
For planar structure, and size meets the requirement of Automobile Transportation width, is conducive to save logistics cost；Inside the truss structure of formation
Clear space it is big, convenient for pit earthwork excavate etc. construction operations；It can be according to the size of foundation pit soil pressure and the span of truss
Flexible assembling forms single or multiple rows of truss structure, strong applicability.
The example of the utility model
The section of basic unit chord member and web member is taken as H400x400x13x21, steel are Q345 (design strengths
295MPa), it is 3000mm, i.e. basic unit that the overall length of basic unit chord member, which is the distance between 2400mm, the center line of two chord members,
The outline border size of structure is width 2400mm, and high 3400mm, the soil pressure of margin of foundation pit is 150kN/m, and foundation pit steel truss support is pressed
It is calculated according to simply supported beam.
1 result of calculation of table
By result of calculation as it can be seen that the utility model flexural capacity is big, bending stiffness is big, it is effective against margin of foundation pit soil
The effect of pressure meets different foundation pit bearing requirements and span requirement, can according to the size of foundation pit soil pressure and truss across
Degree flexible assembling forms single or multiple rows of truss structure, has prominent significant technique effect.
Claims (8)
1. a kind of modularization foundation pit steel truss support structure, it is characterised in that：The steel truss support structure be by single or
Plurality of rows of truss structural is formed, and truss structural includes basic structural unit (1) and edge member (2), plane girder
Structure mainly be spliced by basic structural unit (1), positioned at truss structural edges at two ends basic structural unit with
Edge member (2) connects.
2. a kind of modularization foundation pit steel truss support structure according to claim 1, it is characterised in that：The plane purlin
Frame structure is spliced to form by multiple basic structural units (1) along a row, passes through centre between two neighboring basic structural unit (1)
Connecting node (3) connects, after splicing the basic structural unit (1) at truss structural both ends by end connecting node (4) and
Edge member (2) connects.
3. a kind of modularization foundation pit steel truss support structure according to claim 1 or 2, it is characterised in that：The base
This structural unit (1) is made of two chord members (6) and a diagonal web member (7), two chord members (6) parallel arrangement, two chord members (6) it
Between be connected to form one by diagonal web member (7).
4. a kind of modularization foundation pit steel truss support structure according to claim 3, it is characterised in that：
In the basic structural unit (1), the both ends of two chord members (6) are respectively and fixedly provided with end plate (61), and end plate is located on (61)
Side far from diagonal web member (7) is concordant with the edge of a wing of chord member (6), is located on end plate (61) and extends close to the side of diagonal web member (7)
Go out the edge of a wing of chord member (6), and ribbed stiffener (62) is connected between extended segment and the edge of a wing of chord member (6).
5. a kind of modularization foundation pit steel truss support structure according to claim 3, it is characterised in that：
Connection between the adjacent two rows truss structural is by bolt (5) phase between chord member (6) edge of a wing of the two
It connects.
6. a kind of modularization foundation pit steel truss support structure according to claim 3, it is characterised in that：
The edge of a wing of the chord member (6) is connected, and born by setting bracket from heavy burden by bolt with the purlin on foundation pit periphery
It carries.
7. a kind of modularization foundation pit steel truss support structure according to claim 3, it is characterised in that：
It is by intermediate connecting node (3) that the end plate (61) of the two chord member is mutual between two adjacent basic structural units (1)
Connection, the intermediate connecting node (3) is bolt connection node, between the end plate (61) of two basic structural units (1)
It is bolted.
8. a kind of modularization foundation pit steel truss support structure according to claim 3, it is characterised in that：
By end connecting node (4) by the end plate (61) of chord member between the basic structural unit (1) and edge member (2)
With edge member (2) be connected with each other, the end connecting node (4) be bolt connection node, the end of basic structural unit (1)
It is bolted between plate (61) and edge member (2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721188992.0U CN207512747U (en) | 2017-09-15 | 2017-09-15 | A kind of modularization foundation pit steel truss support structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721188992.0U CN207512747U (en) | 2017-09-15 | 2017-09-15 | A kind of modularization foundation pit steel truss support structure |
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| CN207512747U true CN207512747U (en) | 2018-06-19 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107503358A (en) * | 2017-09-15 | 2017-12-22 | 浙江大学 | Modularization foundation ditch steel truss support structure |
| CN113358470A (en) * | 2021-06-04 | 2021-09-07 | 山东理工大学 | Out-of-plane stable single steel truss test model |
-
2017
- 2017-09-15 CN CN201721188992.0U patent/CN207512747U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107503358A (en) * | 2017-09-15 | 2017-12-22 | 浙江大学 | Modularization foundation ditch steel truss support structure |
| CN113358470A (en) * | 2021-06-04 | 2021-09-07 | 山东理工大学 | Out-of-plane stable single steel truss test model |
| CN113358470B (en) * | 2021-06-04 | 2022-09-13 | 山东理工大学 | Out-of-plane stable single steel truss test model |
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