Gantry frames are reserved inside and outside the hoisting opening for large equipment.

Abstract

This utility model discloses a gantry for reserving space between the inner and outer scaffolding of a hoisting opening for large equipment, relating to the field of steel beam construction technology. The gantry includes a protective outer scaffold and a supporting inner scaffold. The protective outer scaffold includes two first horizontal beams spaced apart in the front-to-back direction and extending in the left-to-right direction, and multiple second horizontal beams spaced apart in the left-to-right direction above the first horizontal beams and extending in the front-to-back direction. The first horizontal beams are used to connect to the scaffolding. The supporting inner scaffold is located inside the protective outer scaffold and includes an inner scaffold horizontal beam extending in the left-to-right direction and two supporting columns extending in the top-to-bottom direction. The left and right ends of the inner scaffold horizontal beam are respectively used to connect to the structural columns. The supporting columns are spaced apart in the left-to-right direction below the inner scaffold horizontal beam, and the other end of the supporting columns is fixedly connected to the ground. The inner scaffold horizontal beam and the two supporting columns together enclose a space for passage. This design improves upon the current practice of requiring the complete removal of both inner and outer scaffolding for hoisting operations, which incurs costs related to dismantling and construction delays.

Description

Technical Field

[0001] This utility model relates to the field of steel beam construction technology, and in particular to a gantry frame for the inner and outer frames of a hoisting opening for large equipment. Background Technology

[0002] In the field of industrial plant construction, the hoisting of large equipment often requires reserving openings for equipment transportation during the main structure construction stage. Traditional techniques face a contradiction between construction period and cost: to meet hoisting requirements, the internal and external scaffolding must be completely dismantled, resulting in costs for dismantling and construction delays; and there are structural safety defects: in conventional doorway reservation schemes, the load-bearing capacity of the coupler-type steel pipe doorway is insufficient to meet the requirement of ≥6m span, the Bailey beam scheme is not economical, and the simple steel support has the risk of node instability.

[0003] Existing improvement attempts have failed to balance structural stability, construction economy, and schedule control, especially lacking a standardized load-bearing system for large-span openings. Therefore, there is an urgent need to develop an innovative solution that integrates high-precision steel assemblies with green construction. Utility Model Content

[0004] The main purpose of this utility model is to propose a method for reserving gantry frames for the inner and outer scaffolding of hoisting openings for large equipment, aiming to improve the current hoisting requirements that require the complete removal of inner and outer scaffolding, resulting in costs associated with dismantling and construction delays.

[0005] To achieve the above objectives, this utility model proposes a gantry frame for the inner and outer scaffolding of large equipment hoisting openings, comprising:

[0006] The protective scaffold includes two first crossbeams spaced apart in the front-to-back direction and extending in the left-to-right direction, and a plurality of second crossbeams spaced apart in the left-to-right direction at the upper end of the first crossbeams and extending in the front-to-back direction. The protective scaffold is used to connect with the scaffold.

[0007] The inner support frame, located inside the outer protective frame, includes an inner frame beam extending in the left-right direction and two support columns extending in the up-down direction. The left and right ends of the inner frame beam are respectively used to connect with the structural columns. The support columns are spaced apart in the left-right direction at the lower end of the inner frame beam, and the other end of the support columns is fixedly connected to the ground. The inner frame beam and the two support columns together enclose a space for passage.

[0008] In one embodiment, multiple inner support frames are provided, each spaced apart in the front-to-back direction, and all are fixedly connected to the structural column; and / or,

[0009] The protective outer frame includes two, each of which is spaced apart along the front and rear direction and is respectively located on the front and rear sides of the supporting inner frame.

[0010] In one embodiment, the plurality of inner support frames are divided into a first group and a second group, the first group being located in front of the second group, and the number of inner support frames in the first group being greater than the number of inner support frames in the second group.

[0011] In one embodiment, the first and second crossbeams are I-beams, and the support columns are H-beams; and / or,

[0012] The inner frame beams of the first group are H-beams, and the inner frame beams of the second group are I-beams.

[0013] In one embodiment, the portal frame reserved inside and outside the hoisting opening for large equipment further includes a connecting part, one end of which is detachably connected to the first crossbeam and / or the second crossbeam, and the other end is used to connect to the scaffolding.

[0014] In one embodiment, the end of the connecting portion that contacts the first crossbeam has a first clamp and a second clamp arranged opposite to each other in the left-right direction, for engaging with both ends of the first crossbeam when the connecting portion is connected to the first crossbeam.

[0015] In one embodiment, the supporting inner frame further includes reinforcing diagonal beams, both ends of which are fixedly connected to the middle portions of the inner frame crossbeams and the middle portions of the supporting columns, respectively; and / or,

[0016] The supporting inner frame also includes corbels, each corbel having two extensions arranged at an included angle, for connecting to the lower side of the inner frame beam and the side of the structural column facing the inner frame beam, respectively.

[0017] In one embodiment, the gantry frame reserved inside and outside the hoisting opening for large equipment further includes a first embedded plate, which is fixedly connected to the lower end of the support column, for corresponding to the support column being set on the ground, and is fixedly connected to the ground by expansion bolts; and / or,

[0018] The portal frame reserved for the inner and outer frames of the hoisting opening for large equipment also includes a second embedded plate, which is fixedly connected to one end of the inner frame beam, so as to fix the inner frame beam to the structural column.

[0019] In one embodiment, the gantry frame reserved inside and outside the hoisting opening for large equipment also includes a buffer element, which is used to be set between the ground and the first embedded plate.

[0020] In one embodiment, the protective frame further includes a support portion, one end of which is optionally connected to the first crossbeam and / or the second crossbeam, and the other end is fixedly connected to the ground.

[0021] In this invention, when construction workers need to assemble steel beams on the construction site, they first place the two steel beams to be assembled on the supporting structures of the inner and outer scaffolding frames of two large equipment hoisting openings. The supporting structures bear the steel beams. At this time, the steel beams are positioned between multiple limiting structures, which abut against the two ends of the steel beams in the lateral direction, thus collectively restricting the lateral movement of the steel beams. Then, the construction workers can operate the adjusting structure to drive at least part of it to move vertically upwards, thereby moving the steel beams vertically upwards to adjust their position. This adjusts the position of the beam openings vertically upwards. After the inner and outer scaffolding frames of the two large equipment hoisting openings have completed the position adjustment of the corresponding steel beams, the construction workers can then assemble the two steel beams. This arrangement improves the accuracy of steel beam assembly and further reduces manpower consumption, increasing work efficiency. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 A schematic diagram of an embodiment of the gantry frame reserved for the inner and outer frames of the hoisting opening of large equipment provided by this utility model;

[0024] Figure 2 for Figure 1 Schematic diagram of the structure of the central protective scaffold;

[0025] Figure 3 for Figure 1 A schematic diagram of the internal support frame.

[0026] Explanation of icon numbers:

[0027] 100. Portal frame reserved for the inner and outer scaffolding of large equipment hoisting openings; 1. Protective outer scaffolding; 11. First crossbeam; 12. Second crossbeam; 13. Support section; 2. Support inner scaffolding; 21. Inner scaffolding crossbeam; 22. Support column; 23. First group; 24. Second group; 25. Reinforcing diagonal beam; 26. Corbel; 3. First embedded plate; 4. Second embedded plate; 5. Structural column; 6. Third crossbeam.

[0028] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0030] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0031] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0032] This utility model proposes a method for reserving gantry frames for the inner and outer scaffolding of hoisting openings for large equipment, aiming to improve the current problem that hoisting needs require the complete removal of inner and outer scaffolding, resulting in costs associated with dismantling and construction delays.

[0033] Please see Figure 1-3In one embodiment of this utility model, the portal frame 100 for the inner and outer scaffolding of the hoisting opening of the large equipment includes a protective outer frame 1 and a supporting inner frame 2. The protective outer frame 1 includes two first crossbeams 11 spaced apart in the front-to-back direction and extending in the left-to-right direction, and a plurality of second crossbeams 12 spaced apart in the left-to-right direction at the upper end of the first crossbeams 11 and extending in the front-to-back direction. The first crossbeams 11 are used to connect with the scaffolding. The supporting inner frame 2 is located below the protective outer frame 1 and includes an inner frame crossbeam 21 extending in the left-to-right direction and two supporting columns 22 extending in the up-down direction. The left and right ends of the inner frame crossbeam 21 are respectively used to connect with the structural column 5. The supporting columns 22 are spaced apart in the left-to-right direction at the lower end of the inner frame crossbeam 21, and the other end of the supporting column 22 is fixedly connected to the ground. The inner frame crossbeam 21 and the two supporting columns 22 together enclose a space for passage.

[0034] It should be noted that, in order to shorten the construction period, the construction workers need to open an opening for the construction equipment to pass through before the main structure of the external scaffolding is completely dismantled. When the factory building is constructed, scaffolding needs to be erected outside the factory building. Its main structure includes an inner frame and an outer frame, which are supported by structural columns 5, and scaffolding is erected on the structural columns 5 to achieve the construction.

[0035] This invention does not limit the length of the first crossbeam 11 and the second crossbeam 12, and can set them according to the actual load analysis. The length of the first crossbeam 11 only needs to be greater than the distance between the two structural columns 5 to protect the supporting crossbeam located between the two structural columns 5. The length of the second crossbeam 12 only needs to be greater than the distance between the two first crossbeams 11. In addition, this invention does not limit the height of the inner frame crossbeam 21 and the distance between the two supporting columns 22 in the left and right directions, and can determine them according to the actual load of the project and the size of the construction equipment that needs to be passed.

[0036] In this embodiment, the length of the first crossbeam 11 is set to 9m, the length of the two second crossbeams 12 is 1.5m, the height of the inner frame crossbeam 21 and the distance between the two support columns 22 in the left and right directions are both 6m, so as to allow large equipment to be hoisted in and out.

[0037] In the technical solution of this utility model, during construction, two first crossbeams 11 and multiple second crossbeams 12 are first connected by welding and installed in the preset position in the main structure frame, and connected to the scaffolding; the inner support frame 2 is set below the protective frame 1, and an inner frame crossbeam 21 is first connected between two structural columns 5. The support columns 22 are spaced apart at the lower end of the inner frame crossbeam 21 in the left and right directions, and the other end of the support columns 22 is fixedly connected to the ground. The inner frame crossbeam 21 and the two support columns 22 together enclose a space for passage. By setting it up in this way, the existing main structure frame and structural columns 5 are used as a support system, reducing material consumption, forming a stable load-bearing structure that can withstand the load during equipment hoisting and ensure construction safety.

[0038] The system includes an inner frame beam 21 extending in the left-right direction and two support columns 22 extending in the up-down direction. The left and right ends of the inner frame beam 21 are respectively connected to the structural columns 5. The support columns 22 are spaced apart at the lower end of the inner frame beam 21 in the left-right direction, and the other end of the support columns 22 is fixedly connected to the ground. The inner frame beam 21 and the two support columns 22 together enclose a space for passage. By using the existing outer frame and structural columns 5 as a support system, material consumption is reduced, a stable load-bearing structure is formed, which can withstand the load during equipment hoisting and ensure construction safety.

[0039] It is understandable that a single supporting inner frame 2 and protective outer frame 1 are insufficiently stable under large spans or high loads. Therefore, in one embodiment of this utility model, multiple supporting inner frames 2 are provided, each of which is spaced apart along the front-to-back direction and is fixedly connected to the structural column 5. In this way, multiple supporting inner frames 2 work together to reduce the load burden on individual components. This utility model does not limit the specific number of supporting inner frames 2, and the number and spacing of supporting inner frames 2 can be determined according to the opening width and load. In one embodiment, when the opening span is 6 meters, 2-3 supporting inner frames 2 can be set, one every 2 meters along the front-to-back direction. The portal frame 100 for the inner and outer frames of the opening for hoisting large equipment also includes multiple third crossbeams 6, which are spaced apart along the left and right directions at the upper end of each inner frame crossbeam 21 and extend along the front-to-back direction; and / or, the protective outer frame 1 includes two, each of which is spaced apart along the front-to-back direction and is respectively located on the front and back sides of the supporting inner frame 2.

[0040] Furthermore, it should be noted that the load on the front side (entrance side) of the gantry is usually greater. Therefore, in one embodiment of this invention, the plurality of inner support frames 2 are divided into a first group 23 and a second group 24. The first group 23 is located in front of the second group 24, and the number of inner support frames 2 in the first group 23 is greater than the number of inner support frames 2 in the second group 24. Grouping the inner support frames 2 by position and differentiating their number allows for targeted reinforcement of weak stress areas. For example, more supports are arranged for areas with greater loads on the entrance side of the gantry. In this embodiment, the first group 23 has three inner support frames 2, and the second group 24 has one, thereby optimizing the layout of the inner support frames 2, increasing support points in key stress areas, improving the structure's ability to bear concentrated loads, and reducing material consumption in non-critical areas, thus lowering costs.

[0041] Furthermore, in one embodiment of this utility model, the inner frame beam 21 of the first group 23 is an H-beam, and the inner frame beam 21 of the second group 24 is an I-beam. It can be understood that an H-beam refers to a steel beam with equal and parallel flanges, an "H"-shaped cross-section, and right-angled edges. Its production process is complex, costly, and relatively expensive, but it exhibits excellent bending and torsional resistance. An I-beam refers to a steel beam with thicker inner and thinner outer flanges, a certain slope (usually 14%), and an "I"-shaped cross-section. Its production cost is low, the process is simple, and its price is relatively low, but its load-bearing capacity is weaker. Thus, by rationally selecting materials, using high-performance materials in key load-bearing components and economical materials in non-critical components, both structural safety and material costs are reduced. In this embodiment, the H-beam is HN250 H-beam, and the I-beam is a 16# I-beam.

[0042] Furthermore, in one embodiment of this utility model, the protective outer frame 1 includes two, each of which is spaced apart along the front and rear direction and is respectively located on the front and rear sides of the supporting inner frame 2, thereby protecting the inner frame at the front and rear positions, enhancing the protective performance, preventing objects from falling, and improving construction safety.

[0043] It is understood that the multiple supporting inner frames 2 and the two protective outer frames 1 can be set individually or together, thereby further enhancing the reliability of the gantry.

[0044] Specifically, in one embodiment of this utility model, the first crossbeam 11 and the second crossbeam 12 are I-beams, and the support column 22 is an H-beam. The crossbeams of the protective frame 1 mainly bear bending loads. I-beams offer high cost-effectiveness, and the support column 22...

[0045] H-beams, better suited to withstand axial pressure and bending moment, better meet strength and stability requirements. Thus, by rationally selecting materials—using high-performance materials in critical load-bearing components and economical materials in non-critical components—both structural safety and material costs can be reduced. In this embodiment, the H-beam is HN250 H-beam, and the I-beam is a 16# I-beam.

[0046] In one embodiment of this utility model, the portal frame 100 for the inner and outer scaffolding of the large equipment hoisting opening further includes a connecting part, one end of which is detachably connected to the first crossbeam 11 and / or the second crossbeam 12, and the other end is used to connect to the scaffolding. By providing the connecting part, direct connection between the scaffolding and the protective outer frame 1 is avoided, which could lead to slippage or loosening under load, affecting structural stability.

[0047] It should be noted that the connecting part can be a bolt or a snap fastener. Specifically, in one embodiment of this utility model, the end of the connecting part that contacts the first crossbeam 11 has a first claw and a second claw arranged opposite each other in the left-right direction, used to engage with both ends of the first crossbeam 11 when the connecting part is connected to it. Thus, the connecting part adopts a "U-shaped" snap fastener structure, with one side engaging the first crossbeam 11 or the second crossbeam 12, and the other end of the connecting part connected to the crossbar of the scaffolding upright by bolts, achieving quick installation and disassembly. In addition, to enhance the connection effect, the end of the connecting part that contacts the first crossbeam 11 can also be a plane extending horizontally and abutting against the first crossbeam 11 or the second crossbeam 12, and connected by welding.

[0048] It is understandable that the inner frame beam 21 is subjected to greater stress at the mid-span and is prone to bending deformation. Therefore, in one embodiment of this utility model, the supporting inner frame 2 further includes a reinforcing inclined beam 25, with both ends fixedly connected to the middle of the inner frame beam 21 and the middle of the supporting column 22, respectively. Its two ends are welded or bolted to the middle of the inner frame beam 21 and the middle of the supporting column 22, respectively, forming a triangular support structure. By sharing the load of the inner frame beam 21, the mid-span bending moment is reduced and the overall stiffness is improved. Specifically, the inclination angle of the reinforcing inclined beam 25 with the horizontal plane is φ, where 40°≤φ≤50°.

[0049] Furthermore, in one embodiment of this utility model, the supporting inner frame 2 further includes a corbel 26, which includes two extension sections arranged along the included angle, for connecting to the lower side of the inner frame beam 21 and the side of the structural column 5 facing the inner frame beam 21, respectively, thereby expanding the stress-bearing area of ​​the connection node, reducing the stress concentration that may occur at the connection node between the inner frame beam 21 and the structural column 5 under load, and enhancing the reliability of the connection.

[0050] In one embodiment of this utility model, the portal frame 100 for the inner and outer scaffolding of the large equipment hoisting opening further includes a first embedded plate 3, which is fixedly connected to the lower end of the support column 22, and is set on the ground corresponding to the support column 22, and is fixedly connected to the ground by expansion bolts; the portal frame 100 for the inner and outer scaffolding of the large equipment hoisting opening also includes a second embedded plate 4, which is fixedly connected to one end of the inner frame beam 21, and is fixed to the inner frame beam 21 within the structural column 5. Thus, the first embedded plate forms a reliable connection with the ground by expansion bolts, and the second embedded plate is pre-embedded when the structural column is poured with concrete to transfer vertical and horizontal loads and ensure the overall stability of the portal frame.

[0051] It should be noted that when the second embedded plate is not positioned accurately or is missing, the second embedded plate can be reinforced with rebar. Rebar installation refers to the post-anchoring connection technology of inserting rebar into the concrete structure. It uses a special rebar adhesive to insert ribbed rebar or plain round rebar into the base concrete, so that the new and old concrete are more firmly bonded together, thereby achieving reinforcement or connection of the structure.

[0052] In addition, to ensure the reliability of the connection, the first embedded plate 3 and the support column 22, and the second embedded plate 4 and the inner frame beam 21 are connected by welding and fully welded, and the weld height is not less than 5 mm.

[0053] The first embedded plate 3 and the second embedded plate 4 can be set separately or together, thereby further enhancing the reliability of the gantry.

[0054] Furthermore, in one embodiment of this utility model, the gantry 100 for the inner and outer frames of the large equipment hoisting opening also includes a buffer component, which is used to be set between the ground and the first embedded plate 3. Before installing the first embedded plate 3, the buffer component is first laid on the ground, and then the first embedded plate 3 is fixed to the buffer component by expansion bolts. In this way, the buffer component absorbs the stress generated by uneven ground and vibration, reduces the impact on the connection node, extends the service life of the gantry, and improves the structural safety. It can be understood that the buffer component can be a rubber buffer pad or a spring pad, which is directly laid between the embedded plate and the ground and automatically compacted when fixed by expansion bolts.

[0055] In one embodiment of the present invention, the protective frame 1 further includes a support portion 13, one end of which can be selectively connected to the first crossbeam 11 and / or the second crossbeam 12, and the other end is fixedly connected to the ground; the support portion 13 can be a pole, a steel pipe or a steel section, thereby providing upward support for the protective frame 1.

[0056] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A portal for setting up an inner and outer frame of a large equipment hoisting portal, characterized in that, include: The protective scaffold includes two first crossbeams spaced apart in the front-to-back direction and extending in the left-to-right direction, and a plurality of second crossbeams spaced apart in the left-to-right direction at the upper end of the first crossbeams and extending in the front-to-back direction. The protective scaffold is used to connect with the scaffold. The inner support frame, located inside the outer protective frame, includes an inner frame beam extending in the left-right direction and two support columns extending in the up-down direction. The left and right ends of the inner frame beam are respectively used to connect with the structural columns. The support columns are spaced apart in the left-right direction at the lower end of the inner frame beam, and the other end of the support columns is fixedly connected to the ground. The inner frame beam and the two support columns together enclose a space for passage.

2. The portal for setting up the inner and outer frames in the lifting hole of a large equipment according to claim 1, characterized in that, The supporting inner frame is provided with multiple third crossbeams, and the portal frame reserved in the inner and outer frames of the large equipment hoisting opening also includes multiple third crossbeams. Each of the supporting inner frames is spaced apart in the front-to-back direction and is used to fix it to the structural column. The multiple third crossbeams are spaced apart in the left-to-right direction at the upper end of each inner frame crossbeam and extend in the front-to-back direction; and / or, The protective outer frame includes two, each of which is spaced apart along the front and rear direction and is respectively located on the front and rear sides of the supporting inner frame.

3. The portal of the inside and outside frame of the large equipment hoisting hole according to claim 2, characterized in that, The multiple supporting inner frames are divided into a first group and a second group. The first group is located in front of the second group, and the number of supporting inner frames in the first group is greater than the number of supporting inner frames in the second group.

4. The portal of the inside and outside frame of the large equipment hoisting hole according to claim 3, characterized in that, The first and second crossbeams are I-beams, and the support columns are H-beams; and / or, The inner frame beams of the first group are H-beams, and the inner frame beams of the second group are I-beams.

5. The portal according to claim 1, wherein The portal frame reserved inside and outside the hoisting opening for large equipment also includes a connecting part, one end of which is detachably connected to the first crossbeam and / or the second crossbeam, and the other end is used to connect to the scaffolding.

6. The portal for setting up the inner and outer frames in the lifting hole of a large equipment according to claim 5, characterized in that, The end of the connecting part that contacts the first crossbeam has a first clamp and a second clamp arranged opposite to each other in the left and right direction, which are used to lock the connecting part to both ends of the first crossbeam when the connecting part is connected to the first crossbeam.

7. The portal of the inside and outside frame of the large equipment hoisting hole according to claim 1, characterized in that, The supporting inner frame also includes reinforcing diagonal beams, both ends of which are fixedly connected to the middle of the inner frame crossbeam and the middle of the supporting column, respectively; and / or, The supporting inner frame also includes corbels, each corbel having two extensions arranged at an included angle, for connecting to the lower side of the inner frame beam and the side of the structural column facing the inner frame beam, respectively.

8. The portal of the inside and outside frame of the large equipment hoisting hole according to claim 1, characterized in that, The gantry frame reserved inside and outside the hoisting opening for large equipment also includes a first embedded plate, which is fixedly connected to the lower end of the support column, so as to correspond to the support column being set on the ground, and is fixedly connected to the ground by expansion bolts; and / or, The portal frame reserved for the inner and outer frames of the hoisting opening for large equipment also includes a second embedded plate, which is fixedly connected to one end of the inner frame beam, so as to fix the inner frame beam to the structural column.

9. The portal of the inside and outside frame of the large equipment hoisting hole according to claim 8, characterized in that, The gantry frame reserved inside and outside the hoisting opening for large equipment also includes a buffer component, which is used to be set between the ground and the first embedded plate.

10. The portal of the inside and outside frame of the large equipment hoisting hole according to claim 1, characterized in that, The protective frame also includes a support section, one end of which can be selectively connected to the first crossbeam and / or the second crossbeam, and the other end is fixedly connected to the ground.

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