Tunnel fan supporting structure suitable for high-altitude strong monsoon climate

Abstract

The utility model discloses a tunnel fan supporting structure suitable for high-altitude strong monsoon climate, and belongs to the technical field of tunnel ventilation. Comprising four stand columns, four lower transverse supports, two or more upper transverse supports and two top beams, and the top beams extend in the length direction of the base frame and are fixed to the top ends of the stand columns; a plurality of mounting beams corresponding to the positions of fan supporting legs are fixedly welded above the top beam in the width direction of the foundation framework; and the mounting beam is fixedly connected with an upper flanged plate. The device is mainly manufactured by welding the I-shaped steel and the channel steel, is convenient to manufacture, has a stable structure, and can well adapt to severe weather in high-altitude and strong monsoon climate regions; the fan is well supported, it is guaranteed that the fan can normally operate under the extreme weather condition, and the air quality in a tunnel is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tunnel ventilation technical field especially suitable for tunnel fan support structure of high altitude strong monsoon climate. BACKGROUND

[0002] During tunnel construction, ventilation fans are generally installed at the tunnel portal to ensure the air ventilation quality in the tunnel and the personal safety of the operating personnel. In view of this, a fan support is needed to be constructed at the portal to support and fix the fan and ensure the normal operation of the fan. The power of the fan depends on the cross-sectional size of the tunnel, the number of operating personnel in the tunnel and the design requirements.

[0003] A certain project is located in the highland area of South Africa with an average altitude of 2100m. It is often accompanied by windy season weather, and the maximum wind force can reach 9 levels. In view of the severe weather in the area where the project is located, in order to ensure that the tunnel fan can be effectively fixed, a fan support structure is designed. This support system is suitable for high altitude and strong wind season areas, and provides reliable support for the fan to ensure that the fan can operate normally under extreme weather conditions. SUMMARY

[0004] The utility model aims at providing a tunnel fan support structure suitable for high altitude and strong monsoon climate to ensure that the fan support structure maintains high reliability in this environment.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A tunnel fan support structure suitable for high altitude and strong monsoon climate, comprising a base framework composed of four columns, four lower cross braces, two or more upper cross braces, and two top beams, the top beams are fixed and extended along the length direction of the base framework at the top end of the columns;

[0007] A plurality of mounting beams corresponding to the positions of the fan feet are fixed and welded above the top beams along the width direction of the base framework;

[0008] The mounting beams are fixedly connected with upper folded edge plates.

[0009] In some embodiments, the columns, lower cross braces, upper cross braces, top beams and mounting beams are all made of I-beams, and the I-beams are welded and connected.

[0010] In some embodiments, it further comprises X-shaped diagonal braces arranged below the top beams;

[0011] Triangular plates are fixedly welded at the connection positions of the lower cross braces, top beams and columns; and the end portions of the diagonal braces are fixedly connected with the triangular plates.

[0012] In some embodiments, the diagonal braces are channel steel; two channel steels of a set of diagonal braces face away from each other; and a connecting plate is arranged at the staggered position of the two channel steels;

[0013] The connecting plate is clamped between the two diagonal braces;

[0014] The diagonal braces and the connecting plate are welded together.

[0015] In some embodiments, the end of the diagonal brace is provided with a positioning hole corresponding to the triangular plate;

[0016] The middle position of the diagonal brace is provided with a positioning hole corresponding to the position of the connecting plate;

[0017] During installation, a pin shaft or a bolt is arranged in the positioning hole for temporary fixation, and high-precision positioning welding is performed.

[0018] In some embodiments, the upper cross brace is arranged along the width direction of the foundation framework, and is fixedly connected to the inner side of the stand column at both ends;

[0019] A tension pipe is arranged at the upper or lower position of the upper cross brace;

[0020] A through hole is arranged on the stand column for the tension pipe to penetrate;

[0021] Positioning holes are arranged on the stand column and the tension pipe corresponding to each other.

[0022] In some embodiments, not less than two clamping columns are arranged at the positions corresponding to the outer edge of the roof beam at both ends of the installation beam; in the installed state, the clamping columns tightly abut the roof beam to apply an inward pulling force.

[0023] In some embodiments, perpendicular holes are arranged at both ends of the installation beam for the clamping columns to be inserted.

[0024] In some embodiments, further comprising: a concrete foundation;

[0025] The concrete foundation is provided with: foundation reinforcement composed of main reinforcement and stirrup, and a plurality of threaded steel bars connected to the foundation reinforcement by lashing;

[0026] The top end of the threaded steel bar is welded with a pre-embedded steel plate exposed from the concrete foundation;

[0027] The lower end of the stand column is welded with a bottom steel plate;

[0028] The bottom steel plate is welded with the pre-embedded steel plate.

[0029] In some embodiments, a protruding column is fixedly arranged on the pre-embedded steel plate; and an outer opening is arranged on one side of the bottom steel plate corresponding to the protruding column.

[0030] Compared with the prior art, the tunnel fan supporting structure suitable for high-altitude strong monsoon climate has the following beneficial effects.

[0031] 1、The utility model discloses, mainly by I -beam, channel steel welding production, need not invest too many materials, convenient to make, stable structure, can very good adaptation high altitude, strong monsoon climate area's bad weather, to the fan played a very good supporting effect, ensured that the fan can normally operate under extreme weather conditions, guarantee the air quality in the tunnel.

[0032] 2、The utility model discloses based on the size of fan, design corresponding support structure size, cooperate the overall weight of fan and external wind force influence, select the material of appropriate specification, construction concrete base, support structure and concrete base welding fixed, overall structure is reliable, has pertinence.

[0033] 3、The utility model discloses the inclined brace of X type layout, improves the anti-deformation ability and bearing capacity of whole, and the reliable support that stably applies in bad environment is provided, and the strength of connecting point is increased to the welding spot of new formation with the welding triangle plate of connecting position, and the longer weld is formed with the connecting plate of inclined brace cooperation, and the connecting strength is higher, and the pin shaft or bolt of alignment hole is set up temporarily fixed, and high-precision alignment welding is carried out, and the further strengthening and high-precision correction are carried out to the welding fixed of the tension pipe and the stand column, and the installation precision of the mounting beam is reliable to the inward tension of the column close to the roof beam, and the mounting precision of the mounting beam is reliable, and the high-precision of the overall foundation alignment is improved with the cooperation of the convex column and the outer opening.

[0034] Other advantages, objects and features of the utility model will be set forth in the subsequent specification to some extent, and to some extent, it will be obvious to those skilled in the art based on the study of the following text, or it can be taught from the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 It is the structural schematic diagram of the utility model.

[0036] Figure 2 It is Figure 1 It is the enlarged structural schematic diagram of place A in the middle.

[0037] Figure 3 It is Figure 1 It is the enlarged structural schematic diagram of place B in the middle.

[0038] Figure 4 It is the first side surface structural schematic diagram of the utility model.

[0039] Figure 5 It is the second side surface structural schematic diagram of the utility model.

[0040] Figure 6The utility model discloses a top view structure schematic diagram.

[0041] Figure 7 The utility model discloses a lower side structure schematic diagram.

[0042] Figure 8 For Figure 7 The enlarged structure schematic diagram of C in the middle.

[0043] Figure 9 The end lower side structure schematic diagram of mounting beam.

[0044] Figure 10 The structure schematic diagram of base frame.

[0045] Figure 11 For Figure 10 The enlarged structure schematic diagram of D in the middle.

[0046] In the drawing:

[0047] 1, stand;

[0048] 11, bottom steel sheet, 12, outer opening;

[0049] 2, lower cross brace;

[0050] 3, upper cross brace;

[0051] 4, top beam;

[0052] 5, mounting beam;

[0053] 51, upper folding edge plate;

[0054] 6, inclined brace;

[0055] 61, triangular plate; 62, connecting plate;

[0056] 7, tension pipe;

[0057] 8, clamping column;

[0058] 9, concrete foundation;

[0059] 91, pre-buried steel plate; 92, convex column. DETAILED DESCRIPTION

[0060] The technical scheme in the utility model embodiment will be clearly and completely described below with reference to the drawings in the utility model embodiment, and apparently, the described embodiment only is a part of the embodiment of the utility model, not all the embodiment.

[0061] Refer to Figures 1-11A tunnel fan support structure suitable for high-altitude strong monsoon climate, comprising a base framework composed of four columns 1, four lower cross braces 2, two or more upper cross braces 3, and two top beams 4, the top beams 4 being fixed at the top ends of the columns 1 along the length direction of the base framework; meanwhile, a plurality of mounting beams 5 corresponding to the positions of the fan feet are fixed and welded above the top beams 4 along the width direction of the base framework.

[0062] It can be understood that it also includes a concrete foundation 9.

[0063] As shown in Figure 1 ; in combination with the actual construction situation, according to the tunnel cross-sectional size, the number of personnel working in the tunnel, and the project specification requirements, etc., the fan model suitable for the project is selected; based on the size of the fan, the corresponding support structure size (length, width, height) is designed; in combination with the overall weight of the fan and the external wind force, the appropriate specification of the material is selected; the material generally uses H-shaped steel and channel steel, which has reliable strength; at the same time, the installation position of the support structure is measured and laid out on the ground, the concrete foundation is constructed, and the steel plate is embedded on the surface of the foundation for the welding and fixation of the support structure and the concrete foundation.

[0064] As shown in Figure 1 , 4 , 5, 6; the columns 1, the lower cross braces 2, the upper cross braces 3, the top beams 4, and the mounting beams 5 are all made of I-beams; the I-beams are welded and connected to form a high-strength support system.

[0065] In some embodiments, the mounting beams 5 are fixedly connected with upper folded edge plates 51.

[0066] As shown in Figure 1 , 2 , the upper turning structure of the upper folded edge plate 51 is located at the outer side position; when installed, it clamps the edge of the fan connecting foot, which can further strengthen the stability and reliability of the installation.

[0067] In some embodiments, it also includes an X-shaped inclined brace 6 located below the top beam 4.

[0068] As shown in Figure 1 , 4 , 7; the inclined brace 6 tightens the two columns 1 and the lower cross braces 2 and the top beams 4, significantly improving the overall deformation resistance and carrying capacity; it can be more stably applied in harsh environments to provide reliable support.

[0069] Further, triangular plates 61 are fixedly welded at the connection positions of the lower cross braces 2, the top beams 4, and the columns 1; through the setting of the triangular plates 61, the strength of the connection points can be significantly increased.

[0070] Still further, the end of the inclined brace 6 is fixedly connected with the triangular plate 61.

[0071] As shown in Figure 1 , 4 After setting the triangular plate 61, not only the welding points of the diagonal brace 6 and the lower cross brace 2, the top beam 4, and the stand column 1 are not affected, but also new welding points of the diagonal brace 6 and the triangular plate 61 are formed, and the overall connection strength and reliability are further improved.

[0072] In some embodiments, the end of the diagonal brace 6 corresponds to the opening of the alignment hole in the triangular plate 61.

[0073] During installation, a pin shaft or a bolt is temporarily fixed in the alignment hole for high-precision alignment welding.

[0074] It can be understood that on the basis of controlling the machining precision, some installation deformation, error and other influences (although there are corrections at each step) will inevitably occur; by setting the alignment hole, the end is accurately aligned to ensure the accuracy and reliability of the welding position; and welding on the basis of temporary fixation can also reduce the influence of adverse factors on the operation during welding.

[0075] Of course, a bolt can also be directly installed in the alignment hole without disassembly for permanent fixation.

[0076] In some embodiments, the diagonal brace 6 adopts a channel steel; the two channel steels of a group of diagonal braces 6 are arranged back to back.

[0077] Thus, there is no interference between the two channel steels, and both are complete, which can ensure more reliable strength; and back-to-back arrangement forms more contact surfaces.

[0078] Further, a connecting plate 62 is arranged at the staggered position of the two.

[0079] As shown in Figure 1 , 4 ; the connecting plate 62 is clamped between the two diagonal braces 6, and its area is larger than the overlapping area of the two channel steels; the diagonal brace 6 and the connecting plate 62 are welded together.

[0080] It can be understood that the two channel steels can also be directly butt-jointed for welding; but the corresponding welding points are shorter; after setting the connecting plate 62, a longer welding seam is formed, and the connection strength is higher.

[0081] Further, an alignment hole is opened at the corresponding position of the connecting plate 62 in the middle position of the diagonal brace 6.

[0082] During installation, a pin shaft or a bolt is temporarily fixed in the alignment hole for high-precision alignment welding.

[0083] In some embodiments, the upper cross brace 3 is arranged along the width direction of the foundation framework, and both ends are fixedly connected to the inner side of the stand column 1.

[0084] As shown in Figure 1 , 5 , 7; each side is provided with an upper cross brace 3; according to the actual need to carry the environment, can be set to multiple.

[0085] Further, the upper or lower position of the upper cross brace 3 is provided with a tension pipe 7.

[0086] Specifically, the column 1 is provided with a through hole for the tension pipe 7 to penetrate.

[0087] At the same time, the column 1 and the tension pipe 7 are provided with a corresponding alignment hole, which helps to adjust the tension pipe 7 to the right position.

[0088] In use, first, the tension pipe 7 is penetrated through two columns 1; and a pin shaft, bolt or other structure is arranged in the corresponding alignment hole at one end of the tension pipe 7, so as to lock the position of the column 1; then, at the other end, through the spool, pry bar and other tools, the tension pipe 7 is aligned with the alignment hole of the column 1, and a temporary fixing member is penetrated and inserted for accurate alignment; after achieving accurate alignment of both ends, the tension pipe 7 is welded and fixed with the column 1.

[0089] In some embodiments, the two ends of the mounting beam 5 are provided with not less than two clamping columns 8 corresponding to the outer edge position of the top beam 4; in the mounting state, the clamping column 8 tightly abuts the top beam 4 to exert an inward pulling force.

[0090] As shown in Figure 4 , 5 , 7, 8; a few small clamping columns 8 tighten the top beam 4; and, by using the alignment effect of the clamping column 8, the installation precision of the mounting beam 5 is reliable.

[0091] Among them, the vertical hole is opened at the two ends of the mounting beam 5 for the clamping column 8 to be inserted.

[0092] Further, a semicircular clamping groove is opened at the outer edge of the top beam 4 corresponding to the position of the clamping column 8.

[0093] It can be understood that the installation position of the mounting beam 5 corresponds to the position of the foot of the fan; before assembling and welding the mounting beam 5, a semicircular clamping groove is opened at the outer edge of the top beam 4 according to the position of the foot of the fan with high precision; when assembling the mounting beam 5, the clamping column 8 is clamped in the semicircular clamping groove, further improving the installation precision.

[0094] And, by using the semicircular clamping groove matched with the clamping column 8, a more reliable welding position is formed when the clamping column 8 is welded with the top beam 4.

[0095] In some embodiments, it further includes a ladder arranged on one side of the support structure.

[0096] It should be noted that the climbing ladder is set up at a proper position according to the site environment; the climbing ladder can be connected with the support structure by welding or bolt assembly.

[0097] In some embodiments, the net plate is arranged above the mounting beam 5 and on both sides of the fan to form a standing surface.

[0098] Further, the top beam 4 is provided with a railing to form a fence.

[0099] So as to facilitate personnel operation and maintenance when the fan fails.

[0100] In some embodiments, the support structure is further coated with paint outside to enhance the overall corrosion and rust resistance.

[0101] Preferably, the thickness of the paint is not less than 3 mm.

[0102] In some embodiments, the concrete foundation 9 is provided with foundation reinforcement composed of main reinforcement and stirrup, and a plurality of threaded steel connected to the foundation reinforcement by lashing wire; a pre-embedded steel plate 91 exposed from the concrete foundation 9 is welded at the top end of the threaded steel; the connection strength of the pre-embedded steel plate 91 can be improved by adding threaded steel.

[0103] Correspondingly, a bottom steel plate 11 is welded at the lower end of the stand column 1; the bottom steel plate 11 is welded and fixed together after being aligned with the pre-embedded steel plate 91.

[0104] It can be understood that the area of the pre-embedded steel plate 91 is not less than the area of the bottom steel plate 11.

[0105] Further, the pre-embedded steel plate 91 is fixedly provided with a protruding column 92.

[0106] Correspondingly, an outer opening 12 is provided on one side of the bottom steel plate 11.

[0107] Through the cooperation of the two, the high precision of the overall foundation alignment is further improved.

[0108] The protruding column 92 can be directly welded at the upper end of the pre-embedded steel plate 91, but this will form some welding protrusions, which will affect the contact between the pre-embedded steel plate 91 and the bottom steel plate 11; at this time, the width of the outer opening 12 is slightly larger than the outer diameter of the protruding column 92, which can avoid the welding protrusions.

[0109] In addition, a hole can also be formed on the pre-embedded steel plate 91; the protruding column 92 is threaded from bottom to top, and the protruding column 92 is welded and fixed at the lower end of the pre-embedded steel plate 91; at this time, the upper end of the pre-embedded steel plate 91 is clean, and the width of the outer opening 12 can be completely consistent with the outer diameter of the protruding column 92.

[0110] Preferably, the opening edge of the outer opening 12 is provided with an arc foot to facilitate clamping during alignment.

[0111] Preferably, as shown in the drawings, the waist plate of the column 1 is provided with a reinforcing plate connected with the bottom steel plate 11. Figure 11

[0112] Preferably, the inner end of the outer opening 12 is attached to the outer wall of the column 1; after positioning, the protruding column 92 is attached to the column 1, and the two are also welded.

[0113] In a certain plateau area project, the tunnel excavation section is a city gate type, with a size of 7.4*7.3m (width*height). In order to ensure that the air quality in the tunnel meets the construction needs, a ventilation fan needs to be installed at the entrance to transport fresh air into the tunnel. The total length of the ventilation distance is about 18700m; according to the requirements of the project specification, a fan with a total power of 640kW is arranged at the tunnel entrance, and the total weight of the machine is about 11.5t, and the peak period of operation personnel in the tunnel is 80 people.

[0114] The purpose of the utility model is:

[0115] (1) the rationality of the fan support structure is designed;

[0116] (2) save construction materials, at the same time, ensure that the stiffness and strength of the fan support system meet the demand of bearing the weight of the fan;

[0117] (3) the fan support structure should be suitable for high altitude, strong monsoon climate area.

[0118] Based on the above conditions, it is intended to use 160*80*6mm I-beam, 120*60*5mm I-beam and 100*50*5mm channel steel to make the overall frame of the fan support structure; the frame appearance size is designed as 5300*2400*3746mm (length* width* height), and welding process is used between each component.

[0119] (1) fan position determination

[0120] According to the actual situation on site, the fan installation position is determined; the survey personnel is informed to loft the fan foundation, and the foundation size is 600*600*700mm (length* width* depth).

[0121] (2) fan foundation construction

[0122] ​After the surveyor completes the lofting, the foundation excavation is immediately started; after the excavation reaches the design size, the foundation steel bars are bound; the main bars use HRB400, φ16mm threaded steel, and the stirrups use HPB300, φ8 round steel; at the same time, HRB400, φ25mm threaded steel is pre-buried, with a depth of about 0.5m underground; a 200x160x10mm pre-buried steel plate is welded on the φ25mm threaded steel, which is used for welding and fixing with the fan support in the later stage; finally, the foundation is poured with C30 concrete.

[0123] (3) Support structure cutting and welding

[0124] The fan support structure is made of 160x80x6mm I-beams, 120x60x5mm I-beams, and 100x50x5mm channel steels, with an appearance size of 5300x2400x3746mm (lengthxwidthxheight); according to the support structure design drawings, the lengths of the steel required for cutting the main structure of the frame are cut in advance, and then the steels are welded and reinforced; the welding is carried out in a full welding manner to ensure that the connection strength between the components meets the requirements; the structure size of the support is measured at all times during the welding process, and if deformation is found, it should be corrected in time to avoid excessive size difference.

[0125] (4) Component surface treatment

[0126] After all the components are welded, personnel are arranged to remove burrs, clean welding slag, dirt, and stains, etc. from each part to ensure the cleanliness of the component surface; finally, about 3mm thick paint is evenly brushed to carry out corrosion and rust prevention treatment on the support components.

[0127] (5) Fan support structure installation

[0128] After the fan support structure is completely manufactured, it is transported to the designated site for installation using a truck-mounted crane; during installation, the columns of the support components are aligned with the pre-buried steel plate on the concrete foundation, the current posture of the support structure is measured using a level, and after adjustment to make it horizontal, it is welded and fixed with the pre-buried steel plate.

[0129] (6) Fan installation

[0130] The fan is hoisted as a whole to the upper part of the fan support structure using a 25t truck-mounted crane, and after the feet are accurately aligned and closely fitted with the support structure, they are welded or bolted.

[0131] It should be noted that:

[0132] (1) When cutting and cutting the parts of the fan support structure, strictly follow the dimensions specified in the drawings; if there is deformation after the components are cut, it should be corrected in time;

[0133] (2) After the assembly of each component on the ground is completed, the structure size shall be rechecked before welding to see whether it meets the requirements of the drawings; full welding shall be used between the components to ensure that there is no air bubble, slag inclusion and other phenomena in the weld to ensure the welding quality;

[0134] (3) When the concrete foundation of the fan is poured, the concrete shall be vibrated to ensure that the foundation construction quality meets the requirements of the specifications; the elevation of all embedded steel plates shall be controlled in advance to ensure the uniformity of the elevation;

[0135] (4) In order to better prevent the fan support from being corroded and rusted, the support shall be painted before being installed;

[0136] (5) After the fan support is processed, the structure appearance size shall be rechecked to see whether it is consistent with the design size; the support shall be checked by using a level when being installed to ensure that the support is in a horizontal state after being installed to avoid the inclination of the support.

[0137] The utility model discloses, consider in high altitude, strong monsoon climate area, the stability of fan support, the convenience of construction, the appearance size of fan support structure is designed according to the field environment, the processing material type of fan support is determined, the installation position of fan is selected according to the actual field.

[0138] The utility model discloses, unlike the support structure of fan of the past, this structure is mainly made of I -beam, channel steel welding and is made, need not to invest too many materials, make convenient, stable structure, can very good adaptation high altitude, strong monsoon climate area's bad weather, to the fan played very good support function, ensured that the fan can normally operate under extreme weather conditions, guaranteeed the air quality in the tunnel, simultaneously, a simple cat ladder was made on the side of the support structure, and protective railings were installed on the top of both sides, so that personnel can climb and overhaul the fan when the fan breaks down.

[0139] In the utility model, the corresponding support structure size is designed according to the size of the fan; the material of appropriate specification is selected in cooperation with the overall weight of the fan and the external wind force influence; the concrete foundation is constructed, and the support structure is welded and fixed with the concrete foundation; the overall structure is reliable and targeted; the inclined brace 6 in X-shaped layout improves the overall deformation resistance and bearing capacity, and reliably provides support in a harsh environment; the triangular plate 61 is welded at the connecting position, the strength of the connecting point is increased, and a new welding point is formed; the inclined brace 6 cooperates with the connecting plate 62 to form a longer weld, and the connecting strength is higher; the pin shaft or bolt is temporarily fixed through the alignment hole, and high-precision alignment welding is carried out; the tension pipe 7 is welded and fixed with the stand column 1, and is further strengthened and high-precision corrected; the clamping column 8 tightly contacts the top beam 4 and applies inward tension, and the installation precision of the mounting beam 5 is reliable; the protruding column 92 cooperates with the outer opening 12, and the high-precision of the overall foundation alignment is improved.

[0140] The above merely describes a preferred embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can make equivalent replacements or changes to the technical scheme and the inventive concept of the present application within the technical scope disclosed by the present application, and all of them should be covered within the protection scope of the present application.

[0141] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms is not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0142] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and modifications to the above embodiments within the scope of the present application.

Claims

1. A tunnel fan support structure suitable for high altitude high monsoon climate comprising of a base frame consisting of four columns (1), four lower cross braces (2), two or more upper cross braces (3) and two top beams (4), characterized in that, The top beam (4) is fixed at the top of the column (1) along the length direction of the base frame; A plurality of mounting beams (5) corresponding to the positions of the fan feet are fixed and welded above the top beam (4) along the width direction of the base frame; The mounting beam (5) is fixedly connected with an upper folded edge plate (51).

2. The tunnel fan support structure suitable for high altitude high monsoon climate as claimed in claim 1 wherein, The column (1), the lower cross brace (2), the upper cross brace (3), the top beam (4), and the mounting beam (5) are all made of I-shaped steel and are welded and connected between the I-shaped steels.

3. The tunnel fan support structure suitable for high altitude high monsoon climate as claimed in claim 1 wherein, Further comprising: an X-shaped diagonal brace (6) arranged below the top beam (4); The connecting positions of the lower cross brace (2), the top beam (4), and the column (1) are fixedly and weldedly provided with triangular plates (61); and the end of the diagonal brace (6) is fixedly connected with the triangular plate (61).

4. The tunnel fan support structure suitable for high altitude high monsoon climate as claimed in claim 3 wherein, The diagonal brace (6) is made of channel steel; the two channel steels of a group of diagonal braces (6) are arranged back to back; and a connecting plate (62) is arranged at the staggered position of the two channel steels; The connecting plate (62) is clamped between the two diagonal braces (6); The diagonal brace (6) and the connecting plate (62) are welded together.

5. The tunnel fan support structure suitable for high altitude high monsoon climate as claimed in claim 4 wherein, The end of the diagonal brace (6) is provided with a positioning hole corresponding to the triangular plate (61); The middle position of the diagonal brace (6) is provided with a positioning hole corresponding to the position of the connecting plate (62); During installation, a pin shaft or a bolt is arranged in the positioning hole for temporary fixing and high-precision positioning welding.

6. The tunnel fan support structure suitable for high altitude high monsoon climate according to claim 1, wherein, The upper cross brace (3) is arranged along the width direction of the base frame and is fixedly connected at the inner side of the column (1) at both ends; A tension pipe (7) is arranged at the upper or lower position of the upper cross brace (3); A through hole is formed in the column (1) for the tension pipe (7) to penetrate; Positioning holes are formed in the column (1) and the tension pipe (7) corresponding to each other.

7. The tunnel fan support structure suitable for high altitude high monsoon climate according to claim 1, wherein, At least two clamping columns (8) are arranged at the outer edge position of the top beam (4) at both ends of the mounting beam (5); in the installed state, the clamping column (8) tightly abuts against the top beam (4) to apply an inward pulling force.

8. The tunnel fan support structure suitable for high altitude high monsoon climate as claimed in claim 7 wherein, Perpendicular holes are formed at both ends of the mounting beam (5) for the clamping column (8) to be inserted.

9. The tunnel fan support structure suitable for high altitude high monsoon climate according to claim 1, wherein, Further comprising: A concrete foundation (9); The concrete foundation (9) is provided with: foundation reinforcement composed of main reinforcement and stirrup, and a plurality of threaded steel bars connected with the foundation reinforcement by lashing wire; The top end of the threaded steel bar is welded with a pre-embedded steel plate (91) exposed from the concrete foundation (9); The lower end of the column (1) is welded with a bottom steel plate (11); The bottom steel plate (11) is welded with the pre-embedded steel plate (91).

10. The tunnel fan support structure suitable for high altitude high monsoon climate as claimed in claim 9 wherein, A protruding column (92) is fixedly arranged on the pre-embedded steel plate (91); and an outer opening (12) is formed on one side of the bottom steel plate (11) corresponding to the protruding column (92).

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