A portal type mobile scaffold suitable for complex working conditions and erection method

Abstract

The present invention belongs to the technical field of scaffolding for building construction, and specifically relates to a portal type mobile scaffolding suitable for complex working conditions and an erection method thereof, wherein the portal type mobile scaffolding comprises uprights and horizontal bars, and also comprises a plurality of ear plates and a supporting device matched with the ear plates; the outer sides of the uprights at both ends of the portal type mobile scaffolding in the length direction are fixedly connected with a plurality of ear plates from top to bottom, and the horizontal projection of the ear plates is perpendicular to the length direction of the portal type mobile scaffolding; compared with the prior art, the advantages and positive effects of the present invention are: (1) the safety and adaptability of the portal type mobile scaffolding in complex working conditions are greatly improved; (2) compared with the existing finished product shoring on the market, the cost is saved and better economic benefits are created; (3) the scaffolding occupies a small area, is light overall, is convenient for erection and movement of the frame, and saves labor; (4) has a wider range of applications; (5) can meet the requirements of adjusting the distance of the portal type mobile scaffolding relative to the parapet.

Description

Technical Field

[0001] The present invention belongs to the technical field of scaffolding for building construction, and in particular relates to a portal type mobile scaffolding suitable for complex working conditions and an erection method thereof. Background Art

[0002] Portal mobile scaffolding is widely used in the field of construction engineering. Most of the erection heights exceed 1.8m, and it is necessary to use a brace to fix the frame. In on-site construction, fastener-type steel pipes are often used as braces and sweeping rods for reinforcement. However, steel pipes are heavy, long, and occupy a large space, making them unsuitable for mobile operations.

[0003] In podium buildings, the structure is relatively complex, and ordinary portal mobile scaffolding is difficult to meet the requirements of more complex working conditions. For example, when using portal mobile scaffolding to work on the edge of the parapet, using only the propping on the indoor side cannot meet the safety function, and there is a lack of tension on the frame, and there is a risk of the frame tilting and falling from a high place.

[0004] In order to prevent people from falling from high places on the portal mobile scaffolding, the method of adding waist bars is often adopted. However, when using it between building floors or in relatively confined spaces, the waist bars of fixed height often collide with structural beams or secondary structures, making it more difficult to erect the waist bars, which greatly reduces the safety of the portal mobile scaffolding. Summary of the invention

[0005] The invention aims at solving the problems existing in the prior art and provides a portal type mobile scaffold suitable for complex working conditions and an erection method.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a portal type mobile scaffold suitable for complex working conditions, the portal type mobile scaffold includes vertical poles and horizontal poles, and also includes multiple ear plates and a supporting device that cooperates with the ear plates; the outer sides of the vertical poles at both ends of the portal type mobile scaffold in the length direction are fixedly connected with multiple ear plates from top to bottom, and the horizontal projection of the ear plate is perpendicular to the length direction of the portal type mobile scaffold; the supporting device includes a triangular support and / or a diagonal brace; one end of the diagonal brace is detachably connected to the main structure of the building, and the other end is detachably connected to the ear plate; one right-angle side of the triangular support is detachably connected to the ear plate, and the other right-angle side is attached to the surface of the main structure of the building.

[0007] Preferably, the diagonal brace includes a lower diagonal brace and an upper diagonal brace; the lower diagonal brace and the upper diagonal brace each include a diagonal brace rod and a mounting block, the mounting block is in the shape of a rectangular tube and is detachably connected to the main structure of the building; the mounting block is provided with a horizontal long strip bolt mounting hole; one end of the diagonal brace rod is bolted to the mounting block via the long strip bolt mounting hole, and the other end is detachably connected to the ear plate.

[0008] Preferably, the gantry type mobile scaffolding also includes a waist bar, which includes four waist bar columns and four waist bar cross beams; the waist bar columns are installed at the upper four corners of the gantry type mobile scaffolding; the waist bar cross beams are erected between adjacent waist bar columns; the waist bar columns include sleeves and telescopic rods, and the outer periphery of the telescopic rod is slidably connected to the inner wall of the sleeve; the telescopic rod is provided with a plurality of positioning holes 1 from top to bottom, and the upper part of the sleeve is provided with a plurality of positioning holes 2 from top to bottom; after a positioning hole 1 of the telescopic rod and a positioning hole 2 of the sleeve are aligned, the sleeve and the telescopic rod are relatively fixed by using a fastener 1; the lower part of the sleeve is detachably connected to the ear plate.

[0009] Preferably, the waist beam is a universal joint beam, comprising a beam body and two hinges, wherein one end of the two hinges in the length direction is hinged to the two ends of the beam body in the length direction respectively, and the two ends of the two hinges away from the beam body are hinged to the upper ends of two adjacent telescopic rods respectively.

[0010] A method for erecting a portal type mobile scaffold suitable for complex working conditions comprises erecting the portal type mobile scaffold suitable for complex working conditions on the inner side of the parapet wall of the current layer: when only one layer of portal type mobile scaffold needs to be erected on the inner side of the parapet wall of the current layer, firstly, the portal type mobile scaffold is moved to the inner side of the parapet wall of the current layer, and the length direction of the portal type mobile scaffold is parallel to the length direction of the parapet wall; then, the vertical poles of the portal type mobile scaffold are fixed by using triangular supports or lower diagonal supports at both ends of the length direction of the portal type mobile scaffold away from the parapet wall; then, the height of the waist bar cross beam is adjusted by adjusting the length of the telescopic rod of the waist bar column extending out of the sleeve.

[0011] Preferably, when there is no concrete counter-slope on the side of the portal movable scaffolding away from the parapet of the current floor, the vertical poles of the portal movable scaffolding are fixed by using the triangular supports, and the triangular supports are fixed to the main structure of the building of the current floor by fitting the right-angled sides of the surface of the current floor with expansion bolts.

[0012] Preferably, when there is a concrete counter-slope on the side of the portal movable scaffolding away from the parapet of the current floor, the vertical poles of the portal movable scaffolding are fixed by means of lower diagonal braces, and the mounting blocks of the lower diagonal braces are fixed to the main structure of the building of the current floor by means of expansion bolts.

[0013] Preferably, when it is necessary to set up two layers of gantry scaffolding on the inner side of the parapet of the current floor, the gantry scaffolding of the upper floor is installed on the upper end of the gantry scaffolding of the lower floor by means of the gantry scaffolding connecting piece; then the gantry scaffolding of the upper floor is fixed by means of the upper diagonal brace; the mounting block of the upper diagonal brace is fixed to the main structure of the superstructure by means of the expansion bolts; or the gantry scaffolding of the upper floor is fixed by means of the upper diagonal brace and the lower diagonal brace, the mounting block of the upper diagonal brace is fixed to the main structure of the superstructure by means of the expansion bolts, and the mounting block of the lower diagonal brace is fixed to the main structure of the current floor by means of the expansion bolts.

[0014] Preferably, when there is a protruding secondary beam at the lower part of the main structure of the superstructure and the secondary beam affects the horizontal installation of the waist beam, the waist beam is obliquely installed at the upper ends of two waist columns at both ends of the gantry mobile scaffolding in the width direction, and the height of the top of the waist column close to the secondary beam is smaller than the height of the top of the waist column away from the secondary beam.

[0015] Preferably, when there is no width restriction on both sides of the portal movable scaffolding in the width direction, triangular supports are installed on the outer sides of the uprights at both ends of the portal movable scaffolding in the length direction, one right-angle side of the triangular support is detachably connected to the ear plate, and the other right-angle side is attached to the surface of the main structure of the building but is not fixed with expansion bolts.

[0016] Compared with the prior art, the advantages and positive effects of the present invention are:

[0017] (1) The safety and adaptability of the portal mobile scaffolding under complex working conditions are greatly improved. The use of triangular supports and / or diagonal braces can provide tension and pressure at the same time; the use of adjustable height waist bars can solve the collision problem with building structures, ceiling steel frames, secondary structures, etc.; the use of diagonal braces can simply solve the problem of concrete anti-slope and super-high frame;

[0018] (2) The triangular support, diagonal support and universal joint type waist crossbeam in the present invention can be easily processed using the leftover materials and tools on site, which saves costs and creates better economic benefits compared with the existing finished tow braces on the market;

[0019] (3) Save space and facilitate construction; the traditional fastener-type steel pipe requires a larger support space and the pipe body is heavier. The portal mobile scaffolding of the present invention occupies a small area, is light overall, is easy to erect, and also facilitates the movement of the frame, saving labor;

[0020] (4) Wider application range; the ear plates fixedly connected to the upright poles in the present invention can be welded as needed, and the diagonal braces, triangular braces and waist pole columns are then matched with the ear plates. Through the above-mentioned matching, the angle between the diagonal braces and the frame can be adjusted arbitrarily, and more complex construction sites can be coped with;

[0021] (5) The support angle of the diagonal brace can be adjusted greatly (the diagonal brace is connected to the ear plate bolts of different heights near the vertical pole end), and the connection position of the diagonal brace away from the vertical pole end and the long strip bolt mounting hole of the mounting block can be fine-tuned. The adjustment of the support angle of the diagonal brace and the fine-tuning of the connection position between the diagonal brace and the mounting block can meet the requirements of adjusting the distance of the portal mobile scaffold relative to the parapet. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the following is a brief introduction to the drawings required for describing the embodiment:

[0023] Figure 1 This is a schematic diagram of a portal mobile scaffold suitable for complex working conditions in Example 1;

[0024] Figure 2 This is a schematic diagram of a portal mobile scaffold suitable for complex working conditions in Example 2;

[0025] Figure 3 This is a schematic diagram of a portal mobile scaffold suitable for complex working conditions in Example 3;

[0026] Figure 4 This is a schematic diagram of a portal mobile scaffold suitable for complex working conditions in Example 4;

[0027] Figure 5 This is a schematic diagram of a portal mobile scaffold suitable for complex working conditions in Example 5;

[0028] Figure 6 This is a schematic diagram of the triangular support in the portal mobile scaffolding suitable for complex working conditions;

[0029] Figure 7 The schematic diagram of the neutral pole and ear plate of the portal mobile scaffold suitable for complex working conditions;

[0030] Figure 8 This is a schematic diagram of the crossbeam of the portal mobile scaffold suitable for complex working conditions;

[0031] Fig. 9 It is a schematic diagram of the upper diagonal brace of the portal mobile scaffold suitable for complex working conditions;

[0032] Fig.10 This is a schematic diagram of the waist column in the portal mobile scaffolding suitable for complex working conditions.

[0033] Description of reference numerals:

[0034] 1-vertical pole, 2-ear plate;

[0035] 3—diagonal brace, 31—lower diagonal brace, 32—upper diagonal brace, 33—mounting block;

[0036] 4—concrete counterslope, 5—parapet wall;

[0037] 6—waist column, 61—sleeve, 62—telescopic rod;

[0038] 7—Fasteners 1, 8—Gate-type mobile scaffolding connector;

[0039] 9—triangular support, 91—connection hole 1, 92—connection hole 2;

[0040] 10—waist beam, 11—secondary beam. DETAILED DESCRIPTION

[0041] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments.

[0042] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0043] Example 1

[0044] Combine the following Figure 1-Figure 10 In the embodiment, a portal mobile scaffold suitable for complex working conditions is provided. Figure 1 and 7 As shown, the portal mobile scaffold includes a vertical pole 1 and a horizontal pole, and also includes a plurality of ear plates 2 and a supporting device matched with the ear plates 2. The outer sides of the vertical poles 1 at both ends of the portal mobile scaffold in the length direction are fixedly connected with a plurality of ear plates 2 from top to bottom, and the horizontal projection of the ear plates 2 is perpendicular to the length direction of the portal mobile scaffold.

[0045] like Figure 1 As shown, the supporting device includes an oblique brace 3; one end of the oblique brace 3 is detachably connected to the main structure of the building, and the other end is detachably connected to the ear plate 2 (bolted connection).

[0046] like Figure 1 and 9 As shown, the diagonal brace 3 includes a lower diagonal brace 31 and an upper diagonal brace 32; the lower diagonal brace 31 and the upper diagonal brace 32 both include a diagonal brace rod and a mounting block 33, the mounting block 33 is in a rectangular tube shape and is detachably connected to the main structure of the building; the mounting block 33 is provided with a horizontal long strip bolt mounting hole; one end of the diagonal brace rod is bolted to the mounting block 33 through the long strip bolt mounting hole, and the other end is detachably connected to the ear plate 2.

[0047] Through the above technical solution, the support angle of the diagonal brace can be greatly adjusted (the end of the diagonal brace close to the vertical pole 1 is bolted to the ear plate 2 of different heights), and the connection position of the end of the diagonal brace far from the vertical pole 1 and the long strip bolt mounting hole of the mounting block 33 can be fine-tuned. The adjustment of the support angle of the diagonal brace and the fine-tuning of the connection position of the diagonal brace and the mounting block 33 can meet the requirements of adjusting the distance of the portal mobile scaffold relative to the parapet 5.

[0048] like Figure 1 , 8 As shown in FIG. 10 , the gantry type mobile scaffolding further comprises a waist bar, which comprises four waist bar columns 6 and four waist bar cross beams 10 ; the waist bar columns 6 are installed at the upper four corners of the gantry type mobile scaffolding; and the waist bar cross beams 10 are erected between adjacent waist bar columns 6 .

[0049] like Figure 1 and 10 As shown, the waist column 6 includes a sleeve 61 and a telescopic rod 62, and the outer periphery of the telescopic rod 62 is slidably connected to the inner wall of the sleeve 61; the telescopic rod 62 is provided with a plurality of positioning holes 1 from top to bottom, and the upper part of the sleeve 61 is provided with a plurality of positioning holes 2 from top to bottom; after a positioning hole 1 of the telescopic rod 62 is aligned with a positioning hole 2 of the sleeve 61, the sleeve 61 and the telescopic rod 62 are relatively fixed by using a fastener 7 (T-bolt); the lower part of the sleeve 61 is detachably connected to the ear plate 2.

[0050] like Figure 8 As shown, the waist beam 10 is a universal joint beam, which includes a beam body and two hinges 101. One end of the two hinges 101 in the length direction is hinged to the two ends of the beam body in the length direction respectively, and the two hinges 101 are hinged to the upper ends of two adjacent telescopic rods 62 at one end away from the beam body.

[0051] The working condition in this embodiment is: a portal movable scaffold is set up on the inner side of the parapet wall 5 of this layer, and at the same time, there is a concrete counter-slope 4 on this layer, and the layer height of this layer is relatively large, so two layers of portal movable scaffold need to be set up.

[0052] A method for erecting a portal mobile scaffold suitable for complex working conditions, comprising erecting the portal mobile scaffold suitable for complex working conditions on the inner side of the parapet 5 of the current layer:

[0053] First, set up the portal movable scaffolding of the lower layer: first, move the portal movable scaffolding of the lower layer to the inner side of the parapet 5 of this layer, and the length direction of the portal movable scaffolding is parallel to the length direction of the parapet 5; then, fix the vertical poles 1 of the portal movable scaffolding by using the lower diagonal braces 31 at both ends of the length direction of the portal movable scaffolding away from the parapet 5, that is, fix the mounting blocks 33 of the lower diagonal braces 31 to the main structure of the building of this layer by expansion bolts.

[0054] Then, the upper gantry scaffold is installed on the upper end of the lower gantry scaffold through the gantry scaffold connector 8; then, the upper gantry scaffold is fixed by the upper diagonal brace 32; and the mounting block 33 of the upper diagonal brace 32 is fixed to the main structure of the superstructure by expansion bolts.

[0055] Then, the height of the waist beam 10 can be adjusted by adjusting the length of the telescopic rod 62 of the waist column 6 extending out of the sleeve 61.

[0056] Example 2

[0057] The difference between this embodiment and embodiment 1 is: Figure 2 and 6 As shown, there is no concrete counter-ridge 4 on this layer, and both ends of the portal movable scaffolding in the length direction away from the parapet 5 are fixed by triangular supports 9 respectively.

[0058] In addition, the upper gantry-type mobile scaffolding of the upper layer is fixed by using the upper diagonal brace 32 and the lower diagonal brace 31, and the mounting block 33 of the upper diagonal brace 32 is fixed to the main structure of the upper building by expansion bolts, and the mounting block 33 of the lower diagonal brace 31 is fixed to the main structure of the current layer by expansion bolts.

[0059] Example 3

[0060] The difference between this embodiment and embodiment 1 is: Figure 3 As shown, the working condition in this embodiment is to set up a portal movable scaffolding on the inner side of the parapet wall 5 of this layer, the layer height of this layer is average, and the lower part of the main structure of the upper layer building is provided with a secondary beam 11.

[0061] When only one layer of portal movable scaffolding needs to be erected on the inner side of the parapet 5 of the current layer, the portal movable scaffolding is first moved to the inner side of the parapet 5 of the current layer, and the length direction of the portal movable scaffolding is parallel to the length direction of the parapet 5; then, the vertical poles 1 of the portal movable scaffolding are fixed by using triangular supports 9 at both ends of the length direction of the portal movable scaffolding away from the parapet 5.

[0062] Because there is a protruding secondary beam 11 at the lower part of the main structure of the superstructure and the secondary beam 11 affects the horizontal installation of the waist cross beam 10, the waist cross beam 10 is obliquely installed on the upper ends of the two waist columns 6 at both ends of the gantry mobile scaffolding in the width direction, and the height of the top of the waist column 6 close to the secondary beam 11 is smaller than the height of the top of the waist column 6 away from the secondary beam 11.

[0063] Example 4

[0064] The difference between this embodiment and embodiment 3 is: Figure 4 As shown, there is no protruding secondary beam 11 at the lower part of the main structure of the superstructure.

[0065] When only one layer of portal scaffolding needs to be erected on the inner side of the parapet 5 of the current layer, the portal scaffolding is first moved to the inner side of the parapet 5 of the current layer, and the length direction of the portal scaffolding is parallel to the length direction of the parapet 5; then, the vertical poles 1 of the portal scaffolding are fixed by triangular supports 9 at both ends of the length direction of the portal scaffolding away from the parapet 5; then, the height of the waist beam 10 is adjusted by adjusting the length of the telescopic rod 62 of the waist column 6 extending out of the sleeve 61.

[0066] Example 5

[0067] The difference between this embodiment and embodiment 1 is that the working condition in this embodiment is that the portal movable scaffold is not set up on the inner side of the parapet 5 of the current layer, but the portal movable scaffold is set up without width restriction.

[0068] like Figure 5 As shown, when there is no width restriction on both sides of the portal mobile scaffolding in the width direction, triangular supports 9 are installed on the outer sides of the uprights 1 at both ends of the portal mobile scaffolding in the length direction, and one right-angle side of the triangular support 9 is detachably connected to the ear plate 2, and the other right-angle side is attached to the surface of the main structure of the building but is not fixed with expansion bolts.

[0069] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in other forms. Any technician familiar with the profession may use the technical contents disclosed above to change or modify them into equivalent embodiments with equivalent changes and apply them to other fields. However, any simple modification or equivalent change made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A method for erecting a portal mobile scaffold suitable for complex working conditions, characterized in that: Including setting up a portal-type mobile scaffolding suitable for complex working conditions on the inner side of the parapet wall (5) of this layer: The portal type mobile scaffold comprises a vertical pole (1), a horizontal pole, a plurality of ear plates (2) and a supporting device matched with the ear plates (2); The outer sides of the uprights (1) at both ends of the portal movable scaffold in the length direction are fixedly connected with a plurality of ear plates (2) from top to bottom, and the horizontal projection of the ear plates (2) is perpendicular to the length direction of the portal movable scaffold; The support device comprises a triangular support (9) and / or an inclined support (3); one end of the inclined support (3) is detachably connected to the main structure of the building, and the other end is detachably connected to the ear plate (2); one right-angled side of the triangular support (9) is detachably connected to the ear plate (2), and the other right-angled side is attached to the surface of the main structure of the building; The diagonal brace (3) comprises a lower diagonal brace (31) and an upper diagonal brace (32); the lower diagonal brace (31) and the upper diagonal brace (32) both comprise a diagonal brace rod and a mounting block (33); the mounting block (33) is in a rectangular tube shape and is detachably connected to the main structure of the building; the mounting block (33) is provided with a horizontal long strip bolt mounting hole; one end of the diagonal brace rod is bolt-connected to the mounting block (33) via the long strip bolt mounting hole, and the other end is detachably connected to the ear plate (2); The portal movable scaffold further comprises a waist bar, which comprises four waist bar columns (6) and four waist bar cross beams (10); the waist bar columns (6) are installed at the four upper corners of the portal movable scaffold; the waist bar cross beams (10) are installed between adjacent waist bar columns (6); The waist-bar column (6) comprises a sleeve (61) and a telescopic rod (62), the outer periphery of the telescopic rod (62) being slidably connected to the inner wall of the sleeve (61); the telescopic rod (62) is provided with a plurality of positioning holes 1 from top to bottom, and the upper part of the sleeve (61) is provided with a plurality of positioning holes 2 from top to bottom; after a positioning hole 1 of the telescopic rod (62) and a positioning hole 2 of the sleeve (61) are aligned, the sleeve (61) and the telescopic rod (62) are relatively fixed by using a fastener 1 (7); the lower part of the sleeve (61) is detachably connected to the ear plate (2); The waist crossbeam (10) is a universal joint crossbeam, comprising a crossbeam body and two hinged parts (101), one end of the two hinged parts (101) in the length direction is respectively hinged to two ends of the crossbeam body in the length direction, and one end of the two hinged parts (101) away from the crossbeam body is respectively hinged to the upper ends of two adjacent telescopic rods (62); When only one layer of gantry type mobile scaffolding is to be erected on the inner side of the parapet wall (5) of the current layer, the gantry type mobile scaffolding is firstly moved to the inner side of the parapet wall (5) of the current layer, with the length direction of the gantry type mobile scaffolding being parallel to the length direction of the parapet wall (5); then, the vertical poles (1) of the gantry type mobile scaffolding are respectively fixed by using triangular supports (9) or lower diagonal supports (31) at both ends of the length direction of the gantry type mobile scaffolding away from the parapet wall (5); and then, the height of the waist bar cross beam (10) is adjusted by adjusting the length of the telescopic rod (62) of the waist bar column (6) extending out of the sleeve (61).

2. The method for erecting a portal mobile scaffold suitable for complex working conditions according to claim 1, characterized in that: When there is no concrete counter-ridge (4) on the side of the portal-type mobile scaffolding away from the parapet wall (5) of the current floor, the vertical pole (1) of the portal-type mobile scaffolding is fixed by using the triangular support (9), and the triangular support (9) is fixed to the main structure of the building of the current floor by fitting it to the right-angled edge of the surface of the current floor through expansion bolts.

3. The method for erecting a portal mobile scaffold suitable for complex working conditions according to claim 1, characterized in that: When there is a concrete counter-step (4) on the side of the portal-type mobile scaffolding away from the parapet wall (5) of the current floor, the vertical pole (1) of the portal-type mobile scaffolding is fixed by means of the lower diagonal brace (31), and the mounting block (33) of the lower diagonal brace (31) is fixed to the main structure of the building of the current floor by means of expansion bolts.

4. The method for erecting a portal mobile scaffold suitable for complex working conditions according to claim 2 or 3, characterized in that: When it is necessary to set up two layers of portal movable scaffolding on the inner side of the parapet wall (5) of the current layer, the portal movable scaffolding of the upper layer is installed on the upper end of the portal movable scaffolding of the lower layer through the portal movable scaffolding connecting piece (8); Then, the upper gantry type mobile scaffolding is fixed by using the upper diagonal brace (32); the mounting block (33) of the upper diagonal brace (32) is fixed to the main structure of the upper building by using expansion bolts; or the upper gantry type mobile scaffolding is fixed by using the upper diagonal brace (32) and the lower diagonal brace (31), the mounting block (33) of the upper diagonal brace (32) is fixed to the main structure of the upper building by using expansion bolts, and the mounting block (33) of the lower diagonal brace (31) is fixed to the main structure of the current building by using expansion bolts.

5. The method for erecting a portal mobile scaffold suitable for complex working conditions according to claim 4, characterized in that: When there is a protruding secondary beam (11) at the lower part of the main structure of the superstructure and the secondary beam (11) affects the horizontal installation of the waist cross beam (10), the waist cross beam (10) is obliquely installed on the upper ends of two waist columns (6) at both ends in the width direction of the portal mobile scaffolding, and the height of the top of the waist column (6) close to the secondary beam (11) is smaller than the height of the top of the waist column (6) away from the secondary beam (11).

6. The method for erecting a portal mobile scaffold suitable for complex working conditions according to claim 1, characterized in that: The invention also includes installing triangular supports (9) on the outer sides of the vertical poles (1) at both ends of the portal-type mobile scaffold in the length direction when there is no width restriction on both sides of the portal-type mobile scaffold in the width direction, wherein one right-angle side of the triangular support (9) is detachably connected to the ear plate (2), and the other right-angle side is attached to the surface of the main structure of the building but is not fixed by expansion bolts.

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