CN215669553U

CN215669553U - Assembled steel structure combined support plane inner truss system

Info

Publication number: CN215669553U
Application number: CN202121787284.5U
Authority: CN
Inventors: 李仁民; 葛立瑞; 刘小波; 王涛
Original assignee: Nanjing Deep Intelligent Construction Technology Research Institute Co ltd; Jiangsu South & East Geotechnical Technology Co ltd
Current assignee: Nanjing Deep Intelligent Construction Technology Research Institute Co ltd; Jiangsu South & East Geotechnical Technology Co ltd
Priority date: 2021-08-02
Filing date: 2021-08-02
Publication date: 2022-01-28
Anticipated expiration: 2031-08-02

Abstract

The utility model discloses an assembled steel structure combined support plane inner truss system which comprises at least one support group, wherein each support group comprises 2-10 main supports which are parallel to each other and arranged at intervals, and the central axes of M main supports in each main support group are positioned in the same horizontal plane; each support group further comprises N H steel cross beams, the H steel cross beams extend along the horizontal direction and are perpendicular to the main support, and webs of the H steel cross beams extend along the vertical direction; each main support is divided into N +1 main support sections by the H-shaped steel cross beam, first flanges are welded at the end parts of the main support sections, two adjacent main support sections of the same main support are detachably connected to two sides of a web plate of the H-shaped steel cross beam through the first flanges, and the first flanges are located in grooves of the H-shaped steel cross beam and abut against the web plate of the H-shaped steel cross beam; the H steel cross beam is erected on the upright post. In this application, cut apart into the main tributary strut section with the main tributary strut, make between the main tributary strut can be through the external force that H steel crossbeam transmission received in the same altitude interval, guarantee the stability of truss system.

Description

Assembled steel structure combined support plane inner truss system

Technical Field

The utility model relates to an assembly type steel structure combined support in-plane truss system.

Background

In the excavation supporting engineering, often adopt the steel construction to support in the replacement traditional reinforced concrete structure and support, the steel shotcrete has that the unit dead weight is light, but reuse, construction modularization, mechanization, green. The steel shotcrete system generally props the structural stress system by steel owner, steel joist, steel corbel, steel stand owner, and the plane biography power is directly accomplished by the owner props, passes power reliably, and the transmission path of power is among the vertical structure: the main support, the joist, the bracket and the upright post have clear and reasonable force transmission. However, the rigidity of a single member of the main steel support is limited, so that the application span of the main steel support in foundation pit supporting engineering is limited, and when the foundation pit span is large, the main steel support is generally adopted for stacking to enlarge the support section and ensure the support strength, but the structure is not economical.

In a foundation pit with large excavation depth and large span, a common cantilever type enclosure structure cannot completely resist lateral soil pressure, and a horizontal support needs to be arranged in the foundation pit. The traditional reinforced concrete support can well limit the deformation of the enclosure structure, but the adoption of the reinforced concrete support also has inevitable defects, the dismantling of the reinforced concrete support can generate great environmental pollution, and the maintenance of concrete can consume a large number of construction periods, so that the engineering cost is greatly increased.

In some projects at present, a single steel structural member inner support is sometimes adopted to replace a traditional reinforced concrete structure inner support, such as a single steel pipe support and a profile steel support, and compared with a reinforced concrete support, the steel support is simple to mount and dismount, does not have great influence on the environment, does not need maintenance, has short construction period, greatly reduces the engineering cost, but has low strength and relatively low rigidity of the support node, and is easy to cause safety accidents.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model provides an assembly type steel structure combined support in-plane truss system, which comprises at least one support group, wherein each support group comprises 2-10 main supports which are parallel to each other and arranged at intervals, the central axes of M main supports in each main support group are positioned in the same horizontal plane, and M is an integer between 2 and 10;

each support group further comprises N H steel cross beams, the H steel cross beams extend along the horizontal direction and are perpendicular to the main support, and webs of the H steel cross beams extend along the vertical direction; n is an integer greater than or equal to 1;

each main support is divided into N +1 main support sections by the H-shaped steel cross beam, first flanges are welded at the end parts of the main support sections, two adjacent main support sections of the same main support are detachably connected to two sides of a web plate of the H-shaped steel cross beam through the first flanges, and the first flanges are located in grooves of the H-shaped steel cross beam and abut against the web plate of the H-shaped steel cross beam;

the H steel cross beam is erected on the upright post. The H-shaped steel beam is a beam made of H-shaped steel. The main support is directly connected with the first flange, and the middle part of the main support is not provided with a transition connecting section and does not change the neck. Specifically, the main support is made of H-shaped steel, a round steel pipe or a rectangular steel pipe.

In this application, owing to split into the main tributary strut section with the main tributary strut, and lug connection is on the web of H steel crossbeam, and first flange directly supports to press on the web of H steel crossbeam, guaranteed that each main tributary strut section can transmit the outside produced pressure of foundation ditch through H steel crossbeam steadily, and the main tributary strut is located the high interval of H steel crossbeam in addition, make between the main tributary strut can transmit the external force that receives in the interval of the same height through H steel crossbeam, guarantee the stability of truss system. In the conventional design, a cross beam is generally erected above or below a main support, the cross beam mainly has the function of supporting the main support, is not used as a force transmission component, and needs to be additionally erected between the main supports to cause a complex structure and increase the dead weight of a truss system.

Because the first flange on the main support section is directly abutted against the web plate of the H steel beam, the section height of the H steel beam is larger than that of the main support, so that the H steel beam has a larger section and can bear larger external force, the bending resistance of the main support can be effectively improved by utilizing the H steel beam, and the rigidity of a truss system is improved, the rigidity of the truss system in the application is increased in a geometric grade compared with the rigidity of a conventional horizontal support in the prior art, the truss system has the advantages of large rigidity in a plane and high pressure resistance, is more suitable for a large-span foundation pit, and has the advantages of convenience in installation, simplicity in site construction, no need of maintenance, high construction speed, recoverability, no dust raising, good environmental friendliness, small overall influence on the surrounding environment and great improvement on the economy.

This truss system can be according to components such as steel shotcrete, even roof beam, connected node, the vertical braces of standardized specification production, and used steel shotcrete, steel shotcrete connected node can be by mill's prefabricated molding, pass through flange joint between the steel shotcrete, and the node is reliable, and satisfies safe economic reasonable demand.

Further, in order to improve the stability of the truss system, at least one connecting beam is further arranged between two adjacent H steel cross beams, the connecting beam is divided into M-1 connecting beam sections by the main support, a second flange is welded at the end part of each connecting beam section, and the connecting beam sections are connected to the main support sections through the second flanges. Utilize even beam segment to connect each main stay section as a whole, when improving bulk strength, can also be connected in advance with the main stay section even beam segment between two H steel crossbeams and be a holistic supporting component, utilize hoisting equipment once only to accomplish supporting component's installation, improve the installation effectiveness.

Further, when the main support is made of H-shaped steel, the connecting beam section is connected to a web plate of the H-shaped steel through a second flange, and the second flange is positioned in a groove of the H-shaped steel and is pressed against the web plate of the H-shaped steel;

when the main support is made of a round steel pipe, connecting end plates are welded on two sides of the round steel pipe in the horizontal direction respectively, and the connecting beam section is connected to the connecting end plates through a second flange.

Above-mentioned design can be in the direction of height, even the roof beam is located the high interval of main tributary strut, makes between the main tributary strut can be through even the roof beam section external force that receives in the interval of same height, further improves the stability of truss system. When the coupling beam is installed below or above the main girder, downward or upward bending of the coupling beam is easily generated, resulting in a decrease in stability of the truss system.

In order to further improve the stability of the truss system, the central axis of the connecting beam and the central axis of the H-shaped steel cross beam are positioned in the same horizontal plane. The design enables the connecting beam and the beam H-shaped steel to uniformly bear the external force transmitted by the main support.

Specifically, to improve the ability of the truss system to withstand external forces applied in the horizontal plane and in the vertical direction, the coupling beams are parallel to the H-steel cross beam.

In order to further improve the stability of the truss system, the central axis of the main support and the central axis of the H-shaped steel cross beam are positioned in the same horizontal plane. The design can enable the main support and the H-shaped steel beam to mutually transmit the external force applied to the main support and the H-shaped steel beam in the same plane, and the truss system is prevented from being bent upwards or downwards to the greatest extent.

Furthermore, in order to avoid weak points, each H-shaped steel beam is composed of a single H-shaped steel.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of the present application.

Fig. 2 is a view from a-a in fig. 1.

Fig. 3 is a view in the direction B-B in fig. 2.

Fig. 4 is a layout diagram of first connecting holes on an H-steel beam in the first embodiment.

Fig. 5 is a schematic structural diagram of a second embodiment of the present application.

Fig. 6 is a view in the direction of C-C in fig. 5.

Fig. 7 is a view in the direction D-D in fig. 6.

Fig. 8 is a schematic view of the installation of the first flange on the main supporting section in the second embodiment.

Fig. 9 is a schematic structural diagram of a third embodiment of the present application.

Fig. 10 is a view from E-E in fig. 9.

Fig. 11 is a view in the direction F-F in fig. 10.

Fig. 12 is a schematic view showing the installation of the first flange on the main stay segment in the third embodiment.

Detailed Description

Referring to fig. 1-4, a first assembled steel structure combined support in-plane truss system includes four first support groups 100, one first support group 100 is exemplarily shown in fig. 1, each first support group includes 6 first main supports 11 arranged in parallel and at intervals, and the first central axes a119 of the 6 first main supports in each first main support group are located in the same horizontal plane, it is understood that in other embodiments, one first support group may include only 2 or 3 first main supports, and certainly, 8 or 10 first main supports. In this embodiment, the first main support 11 is made of a circular steel pipe.

Each first support group 100 further includes 5 first H-steel beams 12 made of first H-steel, the first H-steel beams extend along the horizontal direction and are perpendicular to the first main support, and the first webs 121 of the first H-steel beams 12 extend along the vertical direction.

Each first main support 11 is divided into 6 first main support sections 118 by the first H-shaped steel beam 12, a first flange a111 is welded to the end of each first main support section 118, and a first reinforcing plate 112 is welded between the first flange a and the outer wall of the circular steel pipe serving as the first main support. Two adjacent first main support sections 118 of the same first main support 11 are detachably connected to two sides of a first web 121 of the first H steel beam 12 through a first flange a, and the first flange a is located in a groove of the first H steel beam and abuts against and presses the first web of the first H steel beam. Because first main stay 11 adopts the preparation of circular steel pipe, first flange A adopts the dull and stereotyped flange of ring form to offer the first connecting hole 122 corresponding with the flange hole on the first flange A on the first web.

A first H steel cross beam is erected on the first upright 14. In this embodiment, the first upright is made of a circular steel pipe.

Still be provided with a first tie beam 13 between two adjacent first H steel crossbeams, first tie beam is parallel to first H steel crossbeam, and this first tie beam is split into 5 first tie beam sections 138 by first main beam, has second flange A at the tip welding of first tie beam section 138, and this first tie beam section is connected on first main beam section through second flange A. The first connecting beam is made of a first square steel pipe.

In the embodiment, the first main support is made of a circular steel pipe, the two sides of the circular steel pipe in the horizontal direction are respectively welded with the connecting end plates, and the first connecting beam section is connected to the connecting end plates through the second flange A.

The first central axis A119 of the first main support, the first central axis B129 of the first H steel cross beam and the first central axis C139 of the first connecting beam 13 are all located on the same horizontal plane.

In this embodiment, the first main support adopts

The first H-beam was made of a first H-beam with model number HN800 × 300 × 14 × 22, and the first connecting beam was made of a first square steel tube with model number 400 × 16. And the length of the first main support section is 6 meters.

Example 2

Referring to fig. 5-8, a second assembled steel structure combined support in-plane truss system includes ten second support groups 200, one second support group 200 is exemplarily shown in fig. 5, each second support group includes 6 second main struts 21 arranged in parallel and at intervals, and the second central axes a219 of the 6 second main struts in each second main strut group are located in the same horizontal plane, it is understood that in other embodiments, one second support group may include only 2 or 5 second main struts, and of course, 7 or 9 second main struts. In this embodiment, the second main support 21 is made of a second H-shaped steel.

Each second main support 21 is divided into 6 second main support sections 218 by the second H-steel beam 22, a first flange B211 is welded to an end of each second main support section 218, and a second reinforcing plate 213 is welded between the first flange B and a flange of the second H-steel serving as the second main support. Two adjacent second main support sections 218 of the same second main support 21 are detachably connected to two sides of the second web of the second H-steel beam 22 through a first flange B, and the first flange B is located in the groove of the second H-steel beam and abuts against and presses against the second web of the second H-steel beam. The second main support 21 is made of second H-shaped steel, the first flange B is a square flat flange, and a second connecting hole corresponding to the flange hole in the first flange B is formed in the second web plate.

A second H-steel cross-beam is erected on the second upright 24. In this embodiment, the second column is made of a circular steel pipe.

A second connecting beam 23 is further arranged between two adjacent second H-shaped steel beams, the second connecting beam is parallel to the second H-shaped steel beams and is divided into 5 second connecting beam sections 238 by a second main support, a second flange B is welded at the end part of each second connecting beam section 238 and is connected to the web of the second H-shaped steel through the second flange B, and the second flange B is positioned in the groove of the second H-shaped steel and is abutted against the web of the second H-shaped steel. Namely, the second beam connecting section is connected to the second main supporting section through a second flange B.

The second central axis A219 of the second main support, the second central axis B229 of the second H steel cross beam and the second central axis C239 of the second connecting beam 13 are all located in the same horizontal plane.

Specifically, in this embodiment, the second main support is made of the second H-shaped steel with the model HW400 × 13 × 21, the second H-shaped steel cross beam is made of the first H-shaped steel with the model HN600 × 200 × 11 × 17, and the second connecting beam is made of the first square steel pipe with the model 220 × 10. And the length of the second main support section is 6 meters.

Example 3

Referring to fig. 9-12, a third assembled steel structure combined support in-plane truss system includes eight third support groups 300, one third support group 300 is exemplarily shown in fig. 9, each third support group includes 6 third main struts 31 arranged in parallel and at intervals, and the third central axes a319 of the 6 third main struts in each third main strut group are in the same horizontal plane, it is understood that in other embodiments, one third support group may include only 1 or 4 third main struts, and of course, 8 or 10 second main struts. In this embodiment, the third main support 21 is made of a second square steel pipe.

Each third main support 31 is divided into 6 third main support sections 318 by the third H-steel beam 32, a first flange C311 is welded to an end of each third main support section 318, and a third reinforcing plate 313 is welded between the first flange C and an outer wall of a second square steel pipe serving as a third main support. Two adjacent third main support sections 318 of the same third main support 31 are detachably connected to two sides of the third web of the third H-steel beam 32 through a first flange C, and the first flange C is located in the groove of the third H-steel beam and abuts against and presses against the third web of the third H-steel beam. The second main support 21 is made of a second square steel pipe, so that the first flange C is a square flat flange, and a third connecting hole corresponding to the flange hole in the first flange C is formed in the third web plate.

The third H steel cross beam is erected on the third upright column 34. In this embodiment, the third column is made of a circular steel pipe.

A third connecting beam 33 is further arranged between two adjacent third H steel cross beams, the third connecting beam is parallel to the third H steel cross beams, the third connecting beam is divided into 5 third connecting beam sections 338 by a third main support, a second flange C is welded at the end part of each third connecting beam section 338, and the third connecting beam sections are connected to the third main support sections through the second flanges C.

In this embodiment, the third main support is made of the second square steel pipe, that is, the third main support is made of the square steel pipe, and the square steel pipe is one of the rectangular steel pipes.

The third central axis A319 of the third main support, the third central axis B329 of the third H steel cross beam and the third central axis C339 of the third connecting beam 13 are all located in the same horizontal plane.

Specifically, in this embodiment, the third main support is made of a second square steel pipe with the model number of 100 × 16, the third H-steel cross beam is made of a first H-shaped steel with the model number of HN600 × 200 × 11 × 17, and the second connecting beam is made of a first square steel pipe with the model number of 220 × 10. And the length of the third main support section is 6 meters.

In the above embodiments, the first coupling beam, the second coupling beam, the third coupling beam, and the like are all made of square steel pipes, and the square steel pipes are one kind of rectangular steel pipes.

In the above embodiments, the lengths of the first main support section, the second main support section and the third main support section are all 6 meters, and as a standard length, the lengths can be conveniently used in different foundation pits, and of course, in other embodiments, other standard lengths may also be manufactured, for example, standard lengths of 5 meters, 8 meters, and the like.

Claims

1. An assembled steel structure combined supporting in-plane truss system is characterized in that,

the device comprises at least one support group, wherein each support group comprises 2-10 main supports which are parallel to each other and arranged at intervals, the central axes of M main supports in each main support group are positioned in the same horizontal plane, and M is an integer between 2-10;

the H steel cross beam is erected on the upright post.

2. The fabricated steel structure composite support in-plane truss system of claim 1, wherein the main support is prepared from H-shaped steel, round steel pipe or rectangular steel pipe.

3. The assembled steel structure combination in-plane truss system of claim 2, wherein at least one coupling beam is further arranged between two adjacent H-steel cross beams, the coupling beam is divided into M-1 coupling beam sections by the main support, a second flange is welded on the end of each coupling beam section, and the coupling beam sections are connected to the main support sections through the second flanges.

4. The fabricated steel structure composite support in-plane truss system of claim 3, wherein when the main support is made of H-shaped steel, the coupling beam section is connected to the web of the H-shaped steel through a second flange, and the second flange is located in the groove of the H-shaped steel and pressed against the web of the H-shaped steel;

5. The fabricated steel structure composite support in-plane truss system of claim 3, wherein the central axis of the coupling beam and the central axis of the H-steel cross beam are located in the same horizontal plane.

6. An assembled steel structure composite support in-plane truss system as defined in claim 3 wherein the tie beams are parallel to the H-steel cross beams.

7. The fabricated steel structure composite support in-plane truss system of claim 1, wherein the central axis of the main brace and the central axis of the H-steel cross beam are located in the same horizontal plane.

8. The fabricated steel structural composite support in-plane truss system of claim 1, wherein each H-steel beam is formed of a single H-steel.