Construction platform for tensioning prestress of capping beam

Abstract

The utility model discloses a construction platform for tensioning the prestressing force of a capping beam, the end part of the capping beam is provided with a baffle block, the construction platform comprises a bottom construction truss frame body and an upper suspension truss frame body, the upper suspension truss frame body is fixedly arranged at the lateral upper part of the bottom construction truss frame body, and the baffle block is arranged on the bottom construction truss frame body. The side, close to the upper hanging truss frame body, of the bottom construction truss frame body is provided with a construction window used for being matched with the end of the bent cap, and the upper hanging truss frame body is used for being arranged on the check block in a covering mode and hung on the check block. The construction platform is of a truss type structure and is light in self weight, easy to manufacture and easy to install, hoist, move and store, the construction efficiency of bridge bent cap prestress tensioning is greatly improved, the construction period is shortened, and the construction cost is reduced. Meanwhile, the construction platform adopts a suspension mode, the space below a bridge cover beam is not occupied completely, and the influence on normal travel of people is greatly reduced.

Description

Technical Field

[0001] The utility model belongs to the field of bridges, and in particular relates to a construction device for cap beam construction. Background Art

[0002] Small and medium-span bridges account for more than 3 / 4 of the total number of bridges, and most small and medium-span bridges are beam bridges, of which simply supported beam bridges and continuous beam bridges account for the largest proportion. For multi-span simply supported beam bridges or continuous beam bridges with multiple main beams, a cap beam is required to transfer the weight of the superstructure and the vehicle load during the operation phase to the bridge piers. The bridge cap beam is mostly made of prestressed concrete structure, especially for wide multi-main beam bridges. The cap beam needs to adapt to the width of the bridge superstructure (i.e. the main beam), so the cap beam will have a very long cantilever. The stiffness and bearing capacity of the large cantilever cap beam face great challenges. The use of prestressing is an effective measure to improve the stiffness and bearing capacity of the large cantilever cap beam.

[0003] Due to the heavy weight of prestressed concrete cap beams, the overall prefabrication and hoisting construction method is rarely used. Large cantilever prestressed cap beams are generally constructed using scaffolding cast-in-place or segmental assembly. For large cantilever concrete cap beams that use scaffolding cast-in-place or segmental assembly construction methods, prestressing must be applied before the main beam is hoisted. Currently, the most commonly used method is to erect scaffolds from the ground and set up a construction platform for prestressing. This construction method is cumbersome, has a long construction period, and increases construction costs. For high-pier bridges, this construction method is more expensive and risky. In addition, for urban viaducts, erecting scaffolds will occupy the space under the bridge, greatly affecting the normal passage of existing routes under the bridge. Utility Model Content

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies and defects mentioned in the above background technology and provide a construction platform for prestressing the tensioned cap beam which is simple to construct, has a short construction period, low cost and does not affect the existing traffic under the bridge.

[0005] In order to solve the above technical problems, the technical solutions proposed by the present invention are as follows:

[0006] A construction platform for tensioning prestressed cap beams, wherein a stopper is provided at the end of the cap beam, and the construction platform comprises a bottom construction truss frame and an upper suspension truss frame, wherein the upper suspension truss frame is fixedly mounted on the upper side of the bottom construction truss frame, and the bottom construction truss frame is provided with a construction window for matching the end of the cap beam on a side close to the upper suspension truss frame, and the upper suspension truss frame is used to cover the stopper and be suspended on the stopper.

[0007] In the above-mentioned construction platform, preferably, the bottom construction truss frame includes a base plate truss and a vertical truss, the base plate truss being disposed below the vertical truss, the upper suspension truss frame being connected to the vertical truss, and a diagonal connection assembly being provided between the upper suspension truss frame and the vertical truss. The diagonal connection assembly is used to strengthen the connection between the vertical truss and the horizontal truss, thereby improving the bearing capacity and stability of the construction platform.

[0008] In the above-mentioned construction platform, preferably, the bottom plate truss includes a plurality of bottom plate truss longitudinal rods and a plurality of bottom plate truss transverse rods, and the plurality of bottom plate truss longitudinal rods and the plurality of bottom plate truss transverse rods are vertically staggered and distributed in a grid shape.

[0009] In the above-mentioned construction platform, preferably, the vertical truss includes vertical truss vertical rods, vertical truss oblique rods, vertical truss vertical extension rods, vertical truss longitudinal rods and vertical truss transverse rods, the vertical truss vertical rods and vertical truss vertical extension rods are arranged on the bottom plate truss, the vertical truss longitudinal rods and vertical truss transverse rods are arranged above the vertical truss vertical rods, the vertical truss oblique rods are arranged between adjacent vertical truss vertical rods or between adjacent vertical truss vertical rods and vertical truss vertical extension rods, the vertical truss vertical extension rods are arranged on one side close to the upper suspension truss frame, and the vertical truss is connected to the upper suspension truss frame through the vertical truss vertical extension rods. The stability of the vertical truss can be further improved by arranging the vertical truss oblique rods.

[0010] In the above-mentioned construction platform, preferably, a pair of vertical extension rods of the vertical truss are provided on both sides of the construction window, and the vertical truss further includes short transverse rods of the vertical truss, and the short transverse rods of the vertical truss are provided between adjacent vertical extension rods of the vertical truss. The short transverse rods of the vertical truss provided in the present invention can serve as an escalator for construction workers to enter and exit the prestressed construction platform from the top surface of the bridge cap beam.

[0011] In the above-mentioned construction platform, preferably, the upper suspension truss frame includes a horizontal truss, and the horizontal truss includes a horizontal truss longitudinal rod, a horizontal truss transverse rod, and a horizontal truss vertical rod. The horizontal truss transverse rod is connected through the horizontal truss longitudinal rod and the horizontal truss vertical rod. The bottom of the horizontal truss is open, and the horizontal truss is connected to the bottom construction truss frame through the horizontal truss longitudinal rod. The key function of the horizontal truss is to suspend the construction platform as a whole on the end of the bridge cap beam, and the bottom opening facilitates the hanging of the upper suspension truss frame on the end of the cap beam.

[0012] In the above-mentioned construction platform, preferably, the diagonal connection assembly is a diagonal brace or a front steel wire rope assembly, and the diagonal brace includes two side diagonal braces and a middle diagonal brace, the two side diagonal braces are arranged on both sides of the vertical truss, and the middle diagonal brace is arranged between the two side diagonal braces; one end of the front steel wire rope assembly is connected to the vertical truss, and the other end is connected to the upper suspension truss frame. The setting positions of the above-mentioned two side diagonal braces and the middle diagonal brace can be aligned with the vertical rods of the vertical truss. The diagonal connection assembly can also be a front steel wire rope assembly, which is easier to install and disassemble and can flexibly adjust the length.

[0013] In the above-mentioned construction platform, preferably, a rear-mounted wire rope assembly is further provided between the upper suspension truss frame and the cap beam, with one end of the rear-mounted wire rope assembly fixed to the upper suspension truss frame and the other end fixed to the cap beam. The provision of the rear-mounted wire rope assembly connected to the bridge cap beam further improves the safety of the construction platform.

[0014] In the above-mentioned construction platform, preferably, a steel bottom plate is provided on the inner bottom surface of the bottom construction truss frame, and a retaining steel plate is provided on the side surface of the bottom construction truss frame. The retaining steel plate includes an outer retaining steel plate and / or an inner retaining steel plate. The outer retaining steel plate is provided on the outer side surface of the bottom construction truss frame, and the inner retaining steel plate is provided on the inner side surface of the bottom construction truss frame. By providing a steel bottom plate, a flat platform is provided for construction personnel and equipment. The outer retaining steel plate is provided below the outer side of the vertical truss to prevent objects from falling during construction. The provision of the inner retaining steel plate can further improve construction safety.

[0015] In the above-mentioned construction platform, preferably, the longitudinal width of the upper suspension truss frame is B3, the longitudinal width of the construction window is B1, the transverse width of the upper suspension truss frame is B2, the height of the upper suspension truss frame is H2, the total height of the construction platform is H1, the longitudinal width of the block is b1, the transverse width of the block is b2, the height of the block is h2, and the height of the outermost side of the cap beam is h1. The above B1, B2, B3, H1, H2, b1, b2, h1, and h2 satisfy the following relationship: B1 <b1<B3、B2> b2, H1

[0016] ​In the above-mentioned construction platform, preferably, the base plate trusses, vertical trusses, and horizontal trusses are all composed of rods of different lengths and directions. The diagonal braces can be composed of rods or steel cables. The rods can be square hollow steel rods, round steel pipes, welded I-beams, welded L-shaped steel beams, hot-rolled H-shaped steel, hot-rolled L-shaped steel, hot-rolled angle steel, or cold-bent angle steel. The connection between the above-mentioned rods can be welding or bolting.

[0017] In the above-mentioned construction platform, the steel base plate and outer enclosure steel plate can preferably be made of flat or patterned steel plate. The steel base plate is preferably patterned steel plate to increase friction resistance to prevent construction workers from slipping and equipment from moving. The outer enclosure steel plate is preferably flat steel plate to facilitate cleaning after construction. Of course, the steel base plate can also be flat steel plate, and the outer enclosure steel plate can also be patterned steel plate.

[0018] In the above-mentioned construction platform, preferably, the length of the vertical rods of the vertical trusses should be 100-200 cm, that is, higher than the body center of gravity of an average adult, so as to ensure the safety of construction workers.

[0019] In the above-mentioned construction platform, preferably, the height of the outer enclosure steel plate should be higher than 20 cm, and its bottom should be flush with the bottom of the vertical truss to prevent debris from falling during construction.

[0020] In the above-mentioned construction platform, preferably, the inner enclosure steel plate inside the vertical truss can be a temporarily fixed detachable steel plate so as to be disassembled and cleaned after construction.

[0021] The assembly method of the above-mentioned construction platform may include the following steps:

[0022] S1: Purchase steel rods and plates of appropriate sizes and cut them into designed dimensions;

[0023] S2: Fabricate the bottom plate truss, vertical truss and horizontal truss, and weld the outer enclosure steel plate;

[0024] S3: Assemble the bottom plate truss, vertical truss, horizontal truss, diagonal bracing, bottom plate steel plate and outer enclosure steel plate.

[0025] Compared with the prior art, the advantages of the present invention are:

[0026] 1. The construction platform for prestressing the tensioned cap beam of the utility model is a truss structure (preferably connected by a small number of steel rods and steel plates), which has light weight, simple production and low production cost. The on-site construction unit can make it according to the size of the bridge cap beam by itself, without the need for a special steel structure processing plant for processing. The requirements for the shape and size of the steel rods are low, and there are multiple options. At the same time, it can be recycled among multiple cap beams.

[0027] 2. The construction platform for prestressing the cap beam of the utility model is easy to install, hoist, move and store. There is no need to set up a scaffold at the construction site as in the traditional scheme. The construction efficiency is high, which greatly improves the construction efficiency of prestressing the bridge cap beam, shortens the construction period and reduces the construction cost.

[0028] 3. The construction platform for tensioning the prestressed cap beam of the utility model adopts a suspended manner, which does not occupy the space under the bridge cap beam at all. Especially for newly built viaducts in cities, it will not interrupt the traffic on the existing routes under the bridge, greatly reducing the impact on people's normal travel. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 This is a schematic diagram of the overall structure of the construction platform for prestressing the tensioned cap beam in Example 1.

[0031] Figure 2 This is a schematic diagram of the overall structure of the construction platform for prestressing the tensioned cap beam in Example 1 (including the bridge cap beam).

[0032] Figure 3 for Figure 2 Partial detail drawing.

[0033] Figure 4 Schematic diagram of the cap beam end structure.

[0034] Figure 5 Detailed view of the construction platform for prestressing the cap beam in Example 1 (the steel base plate, outer enclosure steel plate and inner enclosure steel plate are not shown).

[0035] Figure 6 for Figure 1 Front view of .

[0036] Figure 7 for Figure 1 Right view of .

[0037] Figure 8 This is a schematic diagram of the overall structure of the construction platform for prestressing the tensioned cap beam in Example 2.

[0038] Figure 9 This is a schematic diagram of the overall structure of the construction platform for prestressing the tensioned cap beam in Example 3.

[0039] Legend

[0040] 1. Bottom plate truss; 11. Bottom plate truss longitudinal members; 12. Bottom plate truss transverse members; 2. Vertical truss; 21. Vertical truss vertical members; 22. Vertical truss diagonal members; 23. Vertical truss vertical extension members; 24. Vertical truss longitudinal members; 25. Vertical truss transverse members; 26. Vertical truss short transverse members; 3. Horizontal truss; 31. Horizontal truss longitudinal members; 32. Horizontal truss transverse members; 33. Horizontal truss vertical members; 4. Diagonal braces; 41. Diagonal braces on both sides; 42. Diagonal braces in the middle; 5. Steel bottom plate; 6. Outer enclosure steel plate; 7. Cap beam; 71. Block; 8. Inner enclosure steel plate; 9. Front wire rope assembly; 10. Rear wire rope assembly; 100. Construction window. DETAILED DESCRIPTION

[0041] In order to facilitate the understanding of the present invention, the present invention will be described in more comprehensive and detailed manner below in conjunction with the accompanying drawings and preferred embodiments of the specification, but the protection scope of the present invention is not limited to the following specific embodiments.

[0042] It should be noted that when an element is described as being "fixed, fixed, connected or communicated with" another element, it can be directly fixed, fixed, connected or communicated with the other element, or it can be indirectly fixed, fixed, connected or communicated with the other element through other intermediate connectors.

[0043] Unless otherwise defined, all technical terms used hereinafter have the same meanings as those generally understood by those skilled in the art. The technical terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the scope of protection of the present invention.

[0044] Unless otherwise specified, various raw materials, reagents, instruments and equipment used in the present invention can be purchased from the market or prepared by existing methods.

[0045] Example 1:

[0046] like Figure 1-Figure 7 As shown, the construction platform for tensioning the prestressed cap beam of this embodiment has a stop block 71 at the end of the cap beam 7, and the construction platform includes a bottom construction truss frame and an upper suspension truss frame. The upper suspension truss frame is fixedly arranged on the upper side of the bottom construction truss frame, and the bottom construction truss frame is provided with a construction window 100 for matching with the end of the cap beam 7 on one side close to the upper suspension truss frame. The upper suspension truss frame is used to cover the stop block 71 and be suspended on the stop block 71.

[0047] In this embodiment, the bottom construction truss frame includes a bottom plate truss 1 and a vertical truss 2. The bottom plate truss 1 is arranged below the vertical truss 2. The upper suspension truss frame is connected to the vertical truss 2, and a diagonal connecting component is also provided between the upper suspension truss frame and the vertical truss 2.

[0048] like Figure 5 As shown, in this embodiment, the bottom plate truss 1 includes a plurality of bottom plate truss longitudinal rods 11 and a plurality of bottom plate truss transverse rods 12, and the plurality of bottom plate truss longitudinal rods 11 and the plurality of bottom plate truss transverse rods 12 are vertically staggered and distributed in a grid shape.

[0049] like Figure 5 As shown, in this embodiment, the vertical truss 2 includes a vertical truss vertical rod 21, a vertical truss oblique rod 22, a vertical truss vertical extension rod 23, a vertical truss longitudinal rod 24 and a vertical truss transverse rod 25. The vertical truss vertical rod 21 and the vertical truss vertical extension rod 23 are arranged on the bottom plate truss 1, the vertical truss longitudinal rod 24 and the vertical truss transverse rod 25 are arranged above the vertical truss vertical rod 21, the vertical truss oblique rod 22 is arranged between adjacent vertical truss vertical rods 21 or between adjacent vertical truss vertical rods 21 and the vertical truss vertical extension rod 23, the vertical truss vertical extension rod 23 is arranged on one side close to the upper suspension truss frame, and the vertical truss 2 is connected to the upper suspension truss frame through the vertical truss vertical extension rod 23.

[0050] like Figure 5 As shown, in this embodiment, a pair of vertical truss vertical extension rods 23 are provided on both sides of the construction window 100, and the vertical truss 2 also includes vertical truss transverse short rods 26, which are provided between adjacent vertical truss vertical extension rods 23.

[0051] like Figure 5 As shown, in this embodiment, the upper suspended truss frame includes a horizontal truss 3, and the horizontal truss 3 includes a horizontal truss longitudinal member 31, a horizontal truss transverse member 32 and a horizontal truss vertical member 33. The horizontal truss transverse member 32 is connected through the horizontal truss longitudinal member 31 and the horizontal truss vertical member 33. The bottom of the horizontal truss 3 is open, and the horizontal truss 3 is connected to the bottom construction truss frame through the horizontal truss longitudinal member 31.

[0052] like Figure 5 As shown, in this embodiment, the diagonal connecting component is a diagonal brace 4, which includes two side diagonal braces 41 and a middle diagonal brace 42. The two side diagonal braces 41 are arranged on both sides of the vertical truss 2, and the middle diagonal brace 42 is arranged between the two side diagonal braces 41.

[0053] like Figure 1-Figure 3As shown, in this embodiment, a steel bottom plate 5 is provided on the inner bottom surface of the bottom construction truss frame, and an outer enclosure steel plate 6 is provided on the side surface of the bottom construction truss frame. The outer enclosure steel plate 6 is provided on the outer side surface of the bottom construction truss frame.

[0054] like Figure 4 、 Figure 6 、 Figure 7 As shown, in this embodiment, the longitudinal width of the upper suspension truss frame is B3, the longitudinal width of the construction window 100 is B1, the transverse width of the upper suspension truss frame is B2, the height of the upper suspension truss frame is H2, the total height of the construction platform is H1, the longitudinal width of the block 71 is b1, the transverse width of the block 71 is b2, the height of the block 71 is h2, and the height of the outermost side of the cap beam 7 is h1. The above B1, B2, B3, H1, H2, b1, b2, h1, and h2 satisfy the following relationship: B1 <b1<B3、B2> b2, H1

[0055] In this embodiment, the length of the vertical truss vertical rod 21 is preferably 100-200 cm, that is, higher than the body center of gravity of an average adult, so as to ensure the safety of construction workers.

[0056] In this embodiment, the key function of the horizontal truss 3 is to suspend the entire construction platform at the end of the bridge cap beam 7. The steel base plate 5 is made of patterned steel plate to increase friction resistance and prevent construction workers from slipping or equipment from shaking; the outer enclosure steel plate 6 is made of flat steel plate to facilitate cleaning after construction.

[0057] Traditional construction platforms for prestressing the cap beam 7 mostly use full-floor brackets, which are inconvenient to construct, have many rods, and have a long production cycle. In this embodiment, the base plate truss 1, the vertical truss 2, and the horizontal truss 3 are all welded from square hollow steel pipes, which are simple to manufacture, have a short production cycle, and low production costs. The vertical truss oblique rods 22 can further improve the stability of the vertical truss 2. In addition, the vertical truss transverse short rods 26 can provide a foothold for construction personnel to enter and exit the prestressing construction platform from the top surface of the cap beam 7, making it more convenient and safe for construction personnel to enter and exit the construction platform.

[0058] Example 2:

[0059] like Figure 8 As shown, the construction platform for tensioning the prestressed cap beam of this embodiment is basically the same as that of Example 1. The main difference is that, in this embodiment, a temporary detachable steel plate (i.e., the inner enclosure steel plate 8) is added to the inner side of the vertical truss 2, and the outer enclosure steel plate 6 on the front side of the construction platform (the side close to the construction window 100) is extended to a certain height, further reducing the risk of debris falling under the bridge during construction.

[0060] Example 3: ​

[0061] like Figure 9 As shown, the construction platform for tensioning the prestressed cap beam of this embodiment is basically the same as that of Example 2, with the main difference being that, in this embodiment, the oblique connection assembly is a front steel wire rope assembly 9, and a buckle point is set on the vertical truss 2, which can conveniently connect the vertical truss 2 with the horizontal truss 3; in addition, a rear steel wire rope assembly 10 is added to the horizontal truss 3, and one end of the rear steel wire rope assembly 10 is fixed to the upper suspension truss frame, and the other end is fixed to the cap beam 7, which is used to fix the construction platform on the cap beam 7, thereby further improving the safety of the construction platform.

[0062] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A construction platform for tensioning prestressed cap beams, wherein the end of the cap beam (7) is provided with a stopper (71), characterized in that: The construction platform includes a bottom construction truss frame and an upper suspension truss frame. The upper suspension truss frame is fixedly mounted on the upper side of the bottom construction truss frame. The bottom construction truss frame is provided with a construction window (100) on a side close to the upper suspension truss frame for matching with the end of the cap beam (7). The upper suspension truss frame is used to cover the stop block (71) and be suspended on the stop block (71).

2. The construction platform according to claim 1, characterized in that: The bottom construction truss frame comprises a bottom plate truss (1) and a vertical truss (2); the bottom plate truss (1) is arranged below the vertical truss (2); the upper suspension truss frame is connected to the vertical truss (2); and an oblique connection component is further provided between the upper suspension truss frame and the vertical truss (2).

3. The construction platform according to claim 2, characterized in that: The bottom plate truss (1) comprises a plurality of bottom plate truss longitudinal rods (11) and a plurality of bottom plate truss transverse rods (12), wherein the plurality of bottom plate truss longitudinal rods (11) and the plurality of bottom plate truss transverse rods (12) are vertically staggered and distributed in a grid shape.

4. The construction platform according to claim 2, characterized in that: The vertical truss (2) comprises a vertical truss vertical rod (21), a vertical truss oblique rod (22), a vertical truss vertical extension rod (23), a vertical truss longitudinal rod (24) and a vertical truss transverse rod (25); the vertical truss vertical rod (21) and the vertical truss vertical extension rod (23) are arranged on the bottom plate truss (1); the vertical truss longitudinal rod (24) and the vertical truss transverse rod (25) are arranged on the vertical truss vertical rod Above the vertical truss member (21), the vertical truss oblique member (22) is arranged between adjacent vertical truss vertical members (21) or between adjacent vertical truss vertical members (21) and vertical truss vertical extension members (23); the vertical truss vertical extension member (23) is arranged on a side close to the upper suspension truss frame; the vertical truss (2) is connected to the upper suspension truss frame through the vertical truss vertical extension member (23).

5. The construction platform according to claim 4, characterized in that: A pair of vertical truss vertical extension rods (23) are respectively provided on both sides of the construction window (100); the vertical truss (2) further comprises a vertical truss transverse short rod (26); and the vertical truss transverse short rod (26) is provided between adjacent vertical truss vertical extension rods (23).

6. The construction platform according to any one of claims 1 to 5, characterized in that: The upper suspension truss frame comprises a horizontal truss (3), the horizontal truss (3) comprises a horizontal truss longitudinal rod (31), a horizontal truss transverse rod (32) and a horizontal truss vertical rod (33), the horizontal truss transverse rod (32) is connected through the horizontal truss longitudinal rod (31) and the horizontal truss vertical rod (33), the bottom of the horizontal truss (3) is open, and the horizontal truss (3) is connected to the bottom construction truss frame through the horizontal truss longitudinal rod (31).

7. The construction platform according to any one of claims 2 to 5, characterized in that: The oblique connection assembly is an oblique brace (4) or a front steel wire rope assembly (9), the oblique brace (4) comprises two side oblique braces (41) and a middle oblique brace (42), the two side oblique braces (41) are arranged on both sides of the vertical truss (2), and the middle oblique brace (42) is arranged between the two side oblique braces (41); one end of the front steel wire rope assembly (9) is connected to the vertical truss (2), and the other end is connected to the upper suspension truss frame.

8. The construction platform according to any one of claims 1 to 5, characterized in that: A rear-mounted steel wire rope assembly (10) is further provided between the upper suspension truss frame and the cap beam (7), one end of the rear-mounted steel wire rope assembly (10) being fixed on the upper suspension truss frame, and the other end being fixed on the cap beam (7).

9. The construction platform according to any one of claims 1 to 5, characterized in that: The inner bottom surface of the bottom construction truss frame is provided with a steel bottom plate (5), and the side surface of the bottom construction truss frame is provided with a retaining steel plate, and the retaining steel plate includes an outer retaining steel plate (6) and / or an inner retaining steel plate (8), the outer retaining steel plate (6) is provided on the outer side surface of the bottom construction truss frame, and the inner retaining steel plate (8) is provided on the inner side surface of the bottom construction truss frame.

10. The construction platform according to any one of claims 1 to 5, characterized in that: The longitudinal width of the upper suspension truss frame is B3, the longitudinal width of the construction window (100) is B1, the transverse width of the upper suspension truss frame is B2, the height of the upper suspension truss frame is H2, the total height of the construction platform is H1, the longitudinal width of the block (71) is b1, the transverse width of the block (71) is b2, the height of the block (71) is h2, and the height of the outermost side of the cap beam (7) is h1. The above B1, B2, B3, H1, H2, b1, b2, h1, and h2 satisfy the following relationship: B1 <b1<B3、B2> b2, H1 <h1、H2<h2。

Images