CN208815947U - A kind of removable expansion type awning - Google Patents

Abstract

The utility model provides a kind of removable expansion type awning, including the intermediate Roof structure being made of steel column and roof truss, the expansion Roof structure being made of inside steel column, outside steel column and expansion truss, the intermediate orbit system being made of intermediate orbit, intermediate orbit beam and intermediate orbit wheel, system is moved freely by what expansion track, sliding support, expansion sliding support formed, wherein: intermediate Roof structure is supported by intermediate orbit system, and is moved with intermediate orbit system along intermediate orbit；It expands Roof structure to be fixed in the system of moving freely, and is overlapped on intermediate Roof structure, does telescopic moving along intermediate Roof structure.The utility model can realize the quick opening and closing of roof system, more than other open methods simple and stable using the opening ways that rail wheel and track solve the problems, such as awning overlay area, and move in parallel, and be conducive to the raising of construction efficiency.

Description

A kind of removable expansion type awning

Technical field

The utility model relates to the constructing devices in a kind of construction engineering technical field, and in particular, to one kind is removable Expansion type awning.

Background technique

In underground space development, cut and cover method becomes the most frequently used in excavation of foundation pit because of advantages such as construction cost is low, technology maturations One of method.Since cut and cover method foundation pit construction is often in outdoor progress, influenced by factors such as weather more obvious.When rainy season is long Between rainfall easily cause hole internal water accumulation, and then influence security of foundation ditch construction；And summer long-time high temperature keeps excavation of foundation pit live It is exposed to the sun by burning sun, significantly reduces construction efficiency.It, can be although therefore setting up awning above open-cut foundation ditch for rain-proof sunshade It is effectively improved construction environment to a certain extent, but set up awning to bring certain influence to the operation for influencing gantry crane, and simultaneously The installing and dismounting installation of awning is also unfavorable for the raising of the efficiency of construction, it is therefore desirable to which developing one kind can rain-proof sunshade not shadow again Ring the equipment of gantry crane normal construction and the construction method of the equipment.

It finds by prior art documents, China Patent No. 201620851969.4, patent publication No. are as follows: 205894752U, patent name are as follows: removable cover reinforcement shed, the patent readme are as follows: " it is characterized in that, being set among the canopy body It is equipped with column, the top of the column is fixed with girder steel；Further include the first roof system, the second roof system, is all connected with girder steel, and the Have hinge connection between one roof system and the second roof system, the external side of canopy is fixed in the first upright bar and the second upright bar, and the first upright bar and There are fixed pulley and rope in the top of second upright bar, and rope is connected with the first roof system and the second roof system respectively, and controls the first roof system With the folding of the second roof system ".Reinforcement shed described in the patent is limited by outer heel post, can not be changed to removable, and opening square Formula is complicated, stability is poor, is unable to satisfy the requirement of gantry crane rapid construction.

Utility model content

For the defects in the prior art, the utility model patent is designed to provide a kind of removable expansion type rain Canopy, it is irremovable and the drawbacks of gantry crane can not be cooperated to construct to change previous awning, improves the construction environment of open-cut foundation ditch, Reduce the lay day, improves construction efficiency.

In order to achieve the above object, the utility model provides a kind of removable expansion type awning that open-cut foundation ditch uses, including Intermediate Roof structure is expanded and Roof structure, intermediate orbit system and moves freely system, and the intermediate Roof structure is by described Between rail system support, and moved with intermediate orbit of the intermediate orbit system in intermediate orbit system；The expansion room Frame system is moved freely in system and is overlapped on the intermediate Roof structure described in being fixed on, and the expansion Roof structure passes through It is described to move freely system and do telescopic moving along the intermediate Roof structure；

The intermediate Roof structure is made of steel column and roof truss, the expansion Roof structure by inside steel column, Outside steel column and expansion truss composition, the intermediate orbit system is by intermediate orbit, intermediate orbit beam and intermediate orbit wheel group At the system that moves freely is made of expansion track, sliding support, expansion sliding support, in which:

The steel column lower end of the intermediate Roof structure and the intermediate orbit wheel of the intermediate orbit system are solid Fixed connection, the steel column upper end is fixedly connected with the roof truss；The intermediate orbit wheel is engaged with the intermediate orbit Contact, the intermediate orbit is fixed on the intermediate orbit beam and parallel with the intermediate orbit；The expansion Roof structure Outside steel column upper end be fixedly connected with the expansion truss, outside steel column lower end is with described move freely The sliding support of system is fixedly connected, and the lower end of the inside steel column and the expansion for moving freely system are slided Support is fixedly connected；The expansion track both ends for moving freely system are fixed on the middle part of the steel column, described to open up Open up sliding support and the expansion track occlusal contact condition.

Preferably, steel column in the intermediate Roof structure selects I-steel bracket column, the lower part of the bracket column with The inside steel column equal-height position for expanding Roof structure welds the bracket column platform of a right-angled trapezium；The upper surface of bracket column platform The expansion track of zinc-plated high-carbon steel sliding rail is welded, it is identical with lateral awning steelframe beam span to expand track length；The bracket column Top uses width I-steel identical with the lower end of the bracket column, passes through welded connecting between upper and lower two parts；In bracket column Steel plate reinforcement is carried out every a distance in short transverse.In some circumstances, the lower end column of the bracket column it is long by 2500~ 3000mm, wide 300~450mm, bracket column platform be 80~100mm of width, length and bracket column width it is wide right angle ladder；It opens up Exhibition track sliding rail width is 20~30mm；The top of bracket column uses the I-steel of long 1000~1200mm, and bracket column is always a height of 3200~4500mm, and every 300mm carries out steel plate reinforcement in bracket column short transverse.

It is highly preferred that the difference in height C of the bracket column and adjacent outer steel column, bracket column and adjacent outer steel column Spacing L, room canopy face inclination angle theta meet following relationship:

Preferably, the roof truss in the intermediate Roof structure is by lateral awning truss-steel beam, longitudinal zinc-plated purlin and coloured silk Steel plate composition, in which:

The transverse direction awning truss-steel beam is welded on the upper end of the steel column in intermediate Roof structure；The zinc-plated purlin in longitudinal direction Pass through screw connection with lateral awning truss-steel beam；The color steel plate and longitudinal zinc-plated purlin pass through screw connection.

Preferably, in intermediate Roof structure described in each group: the lateral awning truss-steel beam at the top of composition awning is integrally in people Font, and herringbone Liang Ge branch is in respectively 2~5 ° of angles with ground；Between the horizontal span and foundation pit crown beam of lateral awning truss-steel beam Away from adaptable.

Preferably, in the roof truss: the upper and lower part of the transverse direction awning truss-steel beam is using described in steel pipe composition The skeleton of the upper and lower part of roof truss；The centre of the transverse direction awning truss-steel beam is equipped with longitudinal steel pipe and oblique steel pipe, often Corresponding one longitudinal steel pipe of a piece oblique steel pipe, two oblique steel pipes and a longitudinal steel pipe form one The isosceles triangle of line, the web as the roof truss；Lateral awning truss-steel beam is along beams of concrete length direction interval point Cloth.Under partial picture, the upper and lower part of lateral awning truss-steel beam uses diameter for the steel pipe of 50~70mm, lateral awning steelframe The centre of beam 50~80mm of diameter, the longitudinal steel pipe for growing 80~100mm and diameter 50mm~80mm, the oblique of 160~200mm is grown To steel pipe；Lateral awning truss-steel beam is distributed along beams of concrete length direction interval 3000-6000mm.

Preferably, in the roof truss: longitudinal zinc-plated purlin selects lipped channel, longitudinal zinc-plated purlin and lateral awning Truss-steel beam is vertical and is evenly arranged in the upper end of lateral awning truss-steel beam；Longitudinal zinc-plated purlin and lateral awning truss-steel beam pass through spiral shell It tethers and connects.

It is highly preferred that the zinc-plated purlin in longitudinal direction selects the standard cold-formed thin-walled lipped channel-section of the long 90~120mm in section, often Horizontal spacing between channel steel is 800~1200mm, and the long 850~1250mm of the zinc-plated purlin in every longitudinal direction, centre is welded to connect.

Preferably, in the expansion Roof structure: expanding truss and ground in 2~5 ° of angles and and adjacent lateral awning steel The branch to set a roof beam in place is parallel；

The length for expanding truss is less than the half of the span of lateral awning truss-steel beam, and specific length L is by sliding support There is following relationship with the farthest horizontal distance S and tiltangleθ of the foundation pit crown beam of adjacent side:

It is highly preferred that the expansion truss is made of awning beam, purlin, color steel plate, the connection type and room of building block Top truss is identical.

It is highly preferred that purlin uses the zinc-plated purlin in longitudinal direction with roof truss in intermediate Roof structure in the expansion truss The same zinc-plated purlin.

Preferably, the expansion Roof structure has one or more in following characteristics:

The inside steel column selects column type steel pipe, is connected with row's sliding rail wheel in inside steel column lower end；

The outside steel column and the inside steel column are same diameter hollow circular-tube.

It is highly preferred that the inside steel column selects the column type steel pipe of 30~50mm of diameter, the length of inside steel column For 1000mm~1300mm, and the zinc-plated steel sliding rail wheel of a row 4 is connected in inside steel column lower end.

It is highly preferred that the outside steel column selects the column type steel pipe of 100~150mm of diameter, outside steel column is a height of 2200~3500mm.

Preferably, in the intermediate orbit system, intermediate orbit beam is the crown beam in open-cut foundation ditch, and intermediate orbit selects weight Fashioned iron track, using as pedestal on anchoring intermediate orbit beam on the downside of intermediate orbit, on the upside of intermediate orbit with the centre that matches Rail wheel connection.

Preferably, described to move freely system by the expansion track set up on expansion sliding support, intermediate steel column and open up Open up sliding support composition, in which:

Pedestal of the sliding support by the way of multiple universal wheels and flat sheet combination as expansion Roof structure, wherein Plate selects square-shaped metal slab, and slab-thickness is 20mm~40mm, fixes in four angles of flat plate bottom, each welded corner joint One small-sized universal wheel met the requirements.Such as, square-shaped metal plate size is 200~400mm.

It is highly preferred that the expansion track selects zinc-plated high-carbon steel sliding rail, the length and centre Roof structure of track are expanded Span is identical, and the width for expanding track can be 20-30mm.

It is highly preferred that have the expansion sliding support of horizontal motion on the expansion track, the expansion sliding branch The lower setting movable pulley of seat, four groups of movable pulleies move horizontally the expansion sliding support can only.

It is highly preferred that the movable pulley uses rubber tread；The sliding wheel diameter is in 8mm-15mm.

It is highly preferred that the expansion track load-bearing 400kg or more.

Preferably, Roof structure described in one group and mobile system are whole, i.e., expansion Roof structure, intermediate Roof structure, from Whole, 3000~6000mm of spacing between each group, using multiple groups by mobile system and intermediate orbit system.

The working principle of the utility model are as follows:

Intermediate orbit system is mounted on rail bearer foundation, is supported intermediate Roof structure and is provided needed for intermediate roof truss movement Track, rail wheel is mounted on intermediate bracket steel column and connect with rail, plays fixed intermediate roof truss and total on road Roof structure is expanded in the effect moved on rail, the attached sliding support expanded in rail system and the support of small-sized sliding rail, and is allowed and opened up Exhibition Roof structure can move in horizontal and vertical both direction, in the lateral rain of intermediate Roof structure and expansion Roof structure Galvanized steel purlin is installed on capplce, and color steel plate is uniformly installed on longitudinal zinc-plated purlin.Whole system passes through the machine in engineering Tool is driven.

Compared with prior art, the utility model have it is following the utility model has the advantages that

The utility model is long for the outdoor construction time, the feature that by weather is influenced high on construction period, passes through production A kind of removable expansion type awning realizes awning of the construction without handling in a continuous workshop section, in addition to covering main construction Subzone can also be covered except region, and can be collapsed under intermediate roof truss in vehicle pass-through.

The utility model is to reduce and apply with the sunshade of its subzone construction personnel in outdoor project such as foundation pit simultaneously Influence of the rainfall to construction personnel and equipment during work reduces the awning handling construction time used, it is hidden to reduce safety Suffer from, improve production efficiency, meet the needs of engineering construction and vehicle transport, meets requirement of the construction site to construction instrument, With good future in engineering applications.

Detailed description of the invention

Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other spies of the utility model Sign, objects and advantages will become more apparent upon:

Fig. 1 is the awning overall structure front view of one preferred embodiment of the utility model；

Fig. 2 is the details of lateral awning truss-steel beam, zinc-plated purlin, the color steel plate combination of one preferred embodiment of the utility model Figure；

Fig. 3 is that track and expansion sliding support detail drawing are expanded on the intermediate roof truss of one preferred embodiment of the utility model；

Fig. 4 is the sliding support structural schematic diagram for moving freely system of one preferred embodiment of the utility model；

In figure:

1 is sliding support, and 2 be intermediate orbit and intermediate orbit beam, and 3 be intermediate small fashioned iron sliding rail, 4 for inside steel column and Sliding support is expanded, 5 be bracket column, and 6 be attached roof truss girder truss, and 7 be lateral awning truss-steel beam, and 8 be outside steel column, and 9 are Lipped channel purlin, 10 be truss-steel beam top end transverse member, and 11 be web member, and 12 be truss-steel beam bottom end rail, and 13 be color steel plate.

Specific embodiment

The utility model is described in detail combined with specific embodiments below.Following embodiment will be helpful to this field Technical staff further understands the utility model, but does not limit the utility model in any form.It should be pointed out that ability For the those of ordinary skill in domain, without departing from the concept of the premise utility, various modifications and improvements can be made. These are all within the protection scope of the present invention.

A kind of removable expansion type awning, as shown in Figure 1, Figure 2, Figure 3, Figure 4, comprising: sliding support 1, intermediate orbit and Intermediate orbit beam 2 expands track 3, inside steel column and expands sliding support 4, bracket column 5, expands truss 6, lateral awning steel It sets a roof beam in place 7, outside steel column 8, lipped channel purlin 9, truss-steel beam top end transverse member 10, web member 11, truss-steel beam bottom end rail 12, color steel plate 13, linking relationship are as follows:

Sliding support 1 is welded on the lower end of outside steel column 8；The one end for expanding truss 6 is welded on the steel column 8 of outside, The other end for expanding truss 6 is welded on the steel column of inside；One end of attached roof truss girder truss 6 is welded on outside steel column 8 On, the other end of attached roof truss girder truss 6 is welded on the steel column of inside；Inside steel column, which is welded on, to be expanded on sliding support simultaneously It is engaged in intermediate expand on track 3；The both ends for expanding track 3 are bolted respectively on two bracket columns 5；Lateral rain Boron steel sets a roof beam in place 7 welded connectings in the upper end of bracket column 5；Lipped channel purlin 9 and truss-steel beam top end transverse member 10 pass through screw connection, Color steel plate 13 is connect by screw with lipped channel purlin 9.

In above-mentioned building block: bracket column 5, roof truss are (by lateral awning truss-steel beam 7, lipped channel purlin 9, color steel Plate 13 is constituted) form intermediate Roof structure；Intermediate orbit and intermediate orbit beam 2 form intermediate orbit system；Inside steel column is opened up Open up truss 6, the composition of outside steel column 8 expands Roof structure；Sliding support 1 expands track 3, expands sliding support composition freely Mobile system.

In a preferred embodiment, in intermediate Roof structure described in each group:

Form awning at the top of lateral awning truss-steel beam 7 entirety be in herringbone, lambdoid Liang Ge branch respectively with ground Face is in 2 ° of angles, the horizontal span 8000mm of lateral awning truss-steel beam 7；

The long 3000mm of lower end column, the width 450mm of bracket column 5, in the inside steel column equal-height position with expansion Roof structure It is welded with a width 100mm, length and the wide right-angled trapezium bracket column platform of 5 width of bracket column；On above-mentioned bracket column platform Face is connected with by track bolt expands track 3, and the span of length and transverse direction awning truss-steel beam 7 is identical, wide 150mm, bracket column 5 Top use long 1200mm, the identical I-steel of width and lower end, by being welded to connect between upper/lower terminal, bracket column 5 Total a height of 4200mm, and every 300mm steel plate reinforcement of the Q235 steel of 5mm in the short transverse of bracket column 5, wherein bracket column 5 with adjacent 8 difference in height C of outside steel column, the spacing L of bracket column 5 and adjacent outer steel column 8, room canopy face inclination angle theta meet with Lower relationship:

In a preferred embodiment, as shown in Fig. 2, the truss-steel beam top end transverse member 10 and steel of the transverse direction awning truss-steel beam 7 Bottom end rail 12 of setting a roof beam in place is all made of the steel pipe that diameter is 70mm, constitutes the skeleton of the upper and lower part of awning beam truss；Intermediate abdomen The oblique steel pipe of the diameter 80mm of bar 11, longitudinal steel pipe of long 100mm and diameter 80mm, long 200mm, each oblique steel pipe pair The longitudinal direction Ying Yigen steel pipe, two oblique steel pipes and a longitudinal steel pipe form one using longitudinal steel pipe as the isoceles triangle of middle line Shape, this is combined into for the web of awning girder truss.

Further, transverse direction awning truss-steel beam 7 described in each group is distributed along intermediate orbit beam length direction interval 6000mm.

In a preferred embodiment, as shown in Fig. 2, the expansion truss 6 and lateral awning beam 7 use the same structure Form.

In a preferred embodiment, the lipped channel purlin 9 selects lipped channel form；Lipped channel purlin 9 with Lateral awning truss-steel beam 7 is vertical and is evenly arranged on truss-steel beam top end transverse member 10, lipped channel purlin 9 and lateral awning truss-steel beam 7 are bolted.

Further, the lipped channel purlin 9 selects the zinc-plated lipped channel of standard cold bending thin wall of the long 120mm in section, Horizontal spacing between every channel steel is 1200mm；

Every lipped channel purlin 9 is 1250mm long, and centre is welded to connect.

In a preferred embodiment, in the expansion Roof structure: it is simultaneously and adjacent in 2 ° of angles to expand truss 6 and ground The branch of lateral awning truss-steel beam 7 is parallel, and the length for expanding truss 6 is less than the half of lateral 7 span of awning truss-steel beam, specific length L has following relationship by the farthest horizontal distance S and tiltangleθ of sliding support 1 and the intermediate orbit beam of adjacent side:

In a preferred embodiment, in the expansion Roof structure, it is the cylinder of 50mm that inside steel column, which selects diameter, Shape steel tube, length 1300mm, and its lower end is connected with.As shown in Figure 3.

In a preferred embodiment, the outside steel column 8 uses and inside steel column same diameter hollow circular-tube, sky The diameter of heart round tube is 150mm, a height of 3500mm.

In the present embodiment, the intermediate orbit beam is the crown beam in open-cut foundation ditch, and intermediate orbit selects heavy type 38kg steel Track, using as pedestal on anchoring intermediate orbit beam on the downside of intermediate orbit, on the upside of intermediate orbit with the intermediate orbit wheel that matches Connection.

In a preferred embodiment, the system that moves freely is slided by the sliding support 1 on the steel column of outside, expansion The expansion track 3 set up on support and intermediate Roof structure forms, in which:

Pedestal of the sliding support 1 by the way of 4 universal wheels and flat sheet combination as expansion Roof structure, wherein Plate preferred dimension be 400mm square-shaped metal slab, plate with a thickness of 40mm；At four angles, each of flat plate bottom Welded corner joint fixes a diameter of tyres and is 100mm, has the small-sized universal wheel of high-carbon steel bearing and rubber tread (such as Fig. 1, Fig. 4 institute Show).

In a preferred embodiment, 3 length of expansion track welded on the bracket column 5 and lateral awning truss-steel beam 7 Span is identical, width 30mm；

Described expand has the zinc-plated steel of corresponding size to expand the inside that Roof structure is expanded in the connection of sliding support 4 on track 3 Steel column expands the zinc-plated sliding rail wheel diameter of steel of sliding support in 12mm, using four groups of compositions, one expansion moved horizontally Sliding support, the sliding rail wheel for expanding sliding support have rubber tread, expand 3 load-bearing 400kg of track or more.

In a preferred embodiment, expansion Roof structure, intermediate Roof structure described in one group, move freely system and in Between rail system it is whole, spacing 6000mm between each group, using 3 groups.

A kind of working principle of the removable expansion type awning are as follows:

On the basis of the crown beam that intermediate orbit system is mounted on open-cut foundation ditch is used as, supports intermediate Roof structure and provide The mobile required track of intermediate Roof structure；Rail wheel is mounted on intermediate bracket column and connect with rail, plays fixed intermediate The effect that Roof structure and total move on rail；Move freely the sliding support and intermediate small fashioned iron sliding rail in system Roof structure is expanded in support, and expansion Roof structure can be moved in horizontal and vertical both direction；In attached roof truss purlin It sets a roof beam in place and lipped channel purlin is installed on lateral awning truss-steel beam, color steel plate is uniformly installed on lipped channel purlin.Entire dress It sets and is driven by the machinery in engineering.

The utility model is long for construction times such as exterior components such as subway foundation pits, is influenced on construction period height, by weather Big feature, by making a kind of removable expansion type awning, realization construction in a continuous workshop section is not necessarily to the awning of handling, Foundation pit subzone can also be covered other than covering foundation pit, and can be in vehicle pass-through by collapsing in intermediate roof truss system Under system, whole device operates under the control of engineering machinery.The utility model is to apply in foundation pit with its subzone simultaneously The sunshade of worker person reduces influence of the rainfall to construction personnel and equipment in work progress, reduces used in awning handling Construction time reduces security risk, improves production efficiency, meets the needs of engineering construction and vehicle transport, meets construction Requirement of the scene to construction instrument, has good future in engineering applications.

Specific embodiment of the utility model is described above.It is to be appreciated that the utility model not office It is limited to above-mentioned particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, This has no effect on the substantive content of the utility model.

Claims (10)

1. a kind of removable expansion type awning, which is characterized in that including intermediate Roof structure, expand Roof structure, intermediate orbit System and system is moved freely, the intermediate Roof structure is supported by intermediate orbit system, and with intermediate orbit system edge Intermediate orbit in intermediate orbit system is mobile；The expansion Roof structure is moved freely in system and is overlapped on described in being fixed on On the intermediate Roof structure, the expansion Roof structure moves freely system and do along the intermediate Roof structure described in be stretched Contracting movement；

The intermediate Roof structure is made of steel column and roof truss, and the expansion Roof structure is by inside steel column, outside Steel column and expansion truss composition, the intermediate orbit system are made of intermediate orbit, intermediate orbit beam and intermediate orbit wheel, institute The system of moving freely is stated to be made of expansion track, sliding support, expansion sliding support, in which:

The steel column lower end of the intermediate Roof structure and the fixed company of the intermediate orbit wheel of the intermediate orbit system It connects, the steel column upper end is fixedly connected with the roof truss；The intermediate orbit wheel and the intermediate orbit occlusal contact condition, The intermediate orbit is fixed on the intermediate orbit beam and parallel with the intermediate orbit；It is described to expand the described of Roof structure Outside steel column upper end is fixedly connected with the expansion truss, outside steel column lower end and the institute for moving freely system It states sliding support to be fixedly connected, the lower end of the inside steel column and the expansion sliding support for moving freely system are solid Fixed connection；The expansion track both ends for moving freely system are fixed on the middle part of the steel column, the expansion sliding Support and the expansion track occlusal contact condition.

2. a kind of removable expansion type awning according to claim 1, which is characterized in that in the intermediate Roof structure Steel column selects I-steel bracket column, and the lower part of the bracket column is welded with the inside steel column equal-height position for expanding Roof structure Connect the bracket column platform of a right-angled trapezium；The upper surface of bracket column platform welds the expansion track of zinc-plated high-carbon steel sliding rail, expands rail Road length is identical with lateral awning steelframe beam span；The top of the bracket column uses width work identical with the lower end of the bracket column Word steel passes through welded connecting between upper and lower two parts；Steel plate reinforcement is carried out every a distance in bracket column short transverse.

3. a kind of removable expansion type awning according to claim 2, which is characterized in that the bracket column and adjacent outer The difference in height C of steel column, the spacing L of bracket column and adjacent outer steel column, room canopy face inclination angle theta meet following relationship:

4. a kind of removable expansion type awning according to claim 1, which is characterized in that in the intermediate Roof structure Roof truss is made of lateral awning truss-steel beam, longitudinal zinc-plated purlin and color steel plate, in which: the transverse direction awning truss-steel beam welding The upper end of steel column in the intermediate Roof structure；The zinc-plated purlin in longitudinal direction is connect with lateral awning truss-steel beam, described Color steel plate is connect with longitudinal zinc-plated purlin.

5. a kind of removable expansion type awning according to claim 4, which is characterized in that the transverse direction awning truss-steel beam Upper and lower part forms the skeleton of the upper and lower part of the roof truss using steel pipe；The centre of the transverse direction awning truss-steel beam Equipped with longitudinal steel pipe and oblique steel pipe, each oblique steel pipe corresponds to a longitudinal steel pipe, two oblique steel pipes and a longitudinal direction Steel pipe forms a web using longitudinal steel pipe as the isosceles triangle of middle line, as the roof truss；Lateral awning steelframe Beam is spaced apart along beams of concrete length direction；

The transverse direction awning truss-steel beam is integrally in herringbone, and herringbone Liang Ge branch is in respectively 2~5 ° of angles with ground；Lateral rain The horizontal span and foundation pit crown beam spacing that boron steel is set a roof beam in place are adapted.

6. a kind of removable expansion type awning according to claim 4, which is characterized in that the zinc-plated purlin in longitudinal direction is selected Lipped channel, longitudinal zinc-plated purlin is vertical with lateral awning truss-steel beam and is evenly arranged in the upper end of lateral awning truss-steel beam；Institute Longitudinal zinc-plated purlin is stated to be bolted with lateral awning truss-steel beam.

7. a kind of removable expansion type awning according to claim 1-6, which is characterized in that the expansion truss It is in 2~5 ° of angles simultaneously with ground and the adjacent branch of lateral awning truss-steel beam is parallel；

It is described expand truss length be less than intermediate Roof structure transverse direction awning truss-steel beam span half, specific length L by The farthest horizontal distance S and tiltangleθ of the foundation pit crown beam of sliding support and adjacent side have following relationship:

8. a kind of removable expansion type awning according to claim 1-5, which is characterized in that the expansion roof truss System has one or more in following characteristics:

The inside steel column selects column type steel pipe, is connected with row's sliding rail wheel in inside steel column lower end；

The outside steel column and the inside steel column are same diameter hollow circular-tube.

9. a kind of removable expansion type awning according to claim 1-5, which is characterized in that the intermediate orbit System has one or more in following characteristics:

The intermediate orbit beam is the crown beam in open-cut foundation ditch；

The intermediate orbit selects heavy steel track, is anchored on intermediate orbit beam on the downside of the intermediate orbit using as pedestal, It is connect on the upside of intermediate orbit with the intermediate orbit wheel to match.

10. a kind of removable expansion type awning according to claim 1-5, which is characterized in that described freely to move Dynamic system has one or more in following characteristics:

Pedestal of the sliding support by the way of multiple universal wheels and flat sheet combination as expansion Roof structure, wherein putting down Plate selects square-shaped metal slab, and slab-thickness is 20mm~40mm, is respectively welded at four angles of flat plate bottom and fixes one Small-sized universal wheel；

The expansion track selects zinc-plated high-carbon steel sliding rail, and the length for expanding track is identical with intermediate Roof structure span；

There is the expansion sliding support of horizontal motion on the expansion track, sliding is set under the expansion sliding support Wheel, four groups of movable pulleies move horizontally the expansion sliding support can only；

The movable pulley is equipped with rubber tread.