Gas film hoisting construction method capable of avoiding equipment occupation

Abstract

The invention relates to the field of building construction methods, and discloses an air film hoisting construction method capable of avoiding equipment occupation, which comprises the following steps: S1, performing protection treatment on field large equipment; s2, performing structural calculation according to field conditions and large-scale equipment parameters; s3, a steel pipe hanging beam and a distributed hanging point clamp are matched, membrane cable combination units are synchronously lifted according to the preset operation radius, and the membrane cable combination units span the large equipment; s4, the crane is controlled to synchronously descend the membrane cable combination unit, and membrane material falling is completed; and S5, the located membrane material is subjected to inflation debugging. The construction method has the beneficial effects that building forming is completed on the premise that equipment is covered, the existing inherent logic of first disassembly and then construction is replaced, high equipment disassembly and reassembly cost and production halt loss are omitted, the construction period occupied by disassembly is converted into efficient hoisting operation, and the cost and the construction period are greatly optimized.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of building construction methods, in particular to a gas film hoisting construction method for avoiding equipment occupation. BACKGROUND

[0002] Air-supported membrane structure buildings, as a new type of spatial structure form, have been applied in the fields of stadiums, warehouses, temporary exhibition halls and the like due to the advantages of light self-weight, fast construction, low cost and mobility.

[0003] At present, due to the influence of large equipment or stacking occupation on site, the conventional gas film construction method cannot realize the assembly and installation of the membrane material, and the large equipment removal operation is high-risk and directly affects the project construction period and the normal material transportation on site, causing huge economic losses.

[0004] When there is large equipment (such as a bucket wheel machine) or stacking occupation on site, the equipment needs to be completely removed for construction, and the average time for removal and reinstallation is 15-20 days, resulting in production stagnation, high-risk reinstallation operation (such as a 23-meter bucket wheel machine), and equipment disassembly, protection and reinstallation costs, causing economic losses and delay in construction period. SUMMARY

[0005] The technical problem to be solved by the present application is that, at present, for the construction site with large equipment, the large equipment needs to be removed, resulting in high removal cost and long construction period.

[0006] The present application is achieved by the following technical solutions: A gas film hoisting construction method for avoiding equipment occupation, comprising the following steps: S1, protecting and treating the large equipment on site; S2, performing structure calculation according to the site conditions and the parameters of the large equipment; S3, matching a steel pipe hoisting beam and a distributed hoisting point clamp, and simultaneously lifting a membrane cable combination unit according to a preset operation radius, wherein the membrane cable combination unit spans the large equipment; S4, controlling the hoist to simultaneously lower the membrane cable combination unit, and completing the membrane material positioning; S5, inflating and debugging the positioned membrane material.

[0007] The beneficial effects of the present application are that the large equipment is protected during construction without disassembly through the protective treatment in step S1; the safety and feasibility of the subsequent lifting scheme are ensured through the structure calculation in step S2; the pre-assembled whole membrane structure is directly lifted and crossed over the original equipment through the multi-crane collaborative operation and distributed lifting point clamp in steps S3 and S4, so that the original equipment is replaced by bypassing instead of disassembly; and finally the building forming is completed on the premise that the equipment has been covered. Instead of the existing inherent logic of disassembly before construction, not only the high equipment disassembly, reinstallation cost and production loss are saved, but also the construction period occupied due to disassembly is converted into efficient lifting operation, so that the cost and construction period are greatly optimized.

[0008] In some embodiments, the protective treatment in step S1 includes the following steps: S11, remove the protruding parts on the large equipment and keep the installation positioning marks of each protruding part, the protruding parts including an anemometer, a lighting lamp, a monitoring camera and a sensor; S12, weld arc-shaped steel pipes at sharp edge regions of the large equipment, perform non-destructive testing on the welds after welding, and apply fireproof mortar at the welds, the sharp edge regions including a bucket wheel edge, a machine body inclined pull rod and a guardrail interface; S13, wrap the regions of the large equipment that may contact the membrane material with flame-retardant cotton felt, and additionally stack special nylon rubber plates on the bucket of the bucket wheel machine. By removing the protruding parts, the risk of hard scratches is avoided, and by welding arc-shaped steel pipes and flexible wrapping, the risk of cutting and friction of the membrane material by the edges of the equipment is eliminated, so that the safety of the valuable existing large equipment and the new membrane material is ensured during the whole process of membrane material crossing, covering and inflation, so as to realize non-stop production construction.

[0009] In some embodiments, the structure calculation in step S2 includes crane selection calculation, lifting beam deflection calculation and steel wire rope selection calculation. Through the structure calculation, it is ensured that the lifting system (crane, lifting beam and rigging) has sufficient carrying capacity and safety margin, effectively preventing major engineering risks such as lifting imbalance or structural failure caused by calculation omissions.

[0010] In some embodiments, before the synchronous lifting in step S3, the following preparation steps are further included: S31, real-time monitoring of the wind force of the construction environment; S32, a laser range finder is arranged on each of the cranes, and a strain sensor is installed on the distributed lifting point clamp, and the strain sensor is electrically connected with a data acquisition terminal. The laser range finder and the strain sensor construct digital information of the lifting process, provide high-precision synchronous control data and structure stress information for the commander, so as to realize the data basis of precise collaboration of multiple cranes, uniform distribution of load and controllable process risks.

[0011] In some embodiments, the synchronous lifting in step S3 comprises the following steps: S301, control 4-5 cranes to start synchronously, and monitor the lifting height of each crane in real time during lifting, and the synchronous deviation of multiple cranes is not greater than 50 mm; S302, the strain sensor monitors the lifting point stress in real time, and when the lifting point stress exceeds 1.2 times of the design value, the lifting is paused and the lifting point stress is adjusted; S303, the lifting height of the membrane cable combined unit is higher than 15 m from the top of the large equipment. By setting a quantifiable and accurate operation (such as synchronous deviation ≤50 mm, stress overrun 1.2 times to adjust), through dynamic monitoring and feedback control, the membrane load balance is actively maintained, and the local overload, tearing or collision with the equipment caused by asynchronization is fundamentally avoided.

[0012] In some embodiments, when performing step S4, the following steps are further included: S41, when the membrane cable combined unit is lowered to 200 mm from the top of the large equipment, the crane is paused, and the membrane is manually guided to cover the protective layer of the large equipment; S42, after the membrane is landed, the steel pipe lifting beam is removed, and the distributed lifting point clamp is retained as a permanent connecting piece for fixing the membrane; S43, fireproof cloth is laid around the large equipment, and foam board is added in the area where the membrane contacts the ground. First, the soft contact between the membrane and the protective layer of the equipment is realized by air suspension and manual guidance, impact damage is prevented, and the lifting clamp is retained as a permanent connecting piece, avoiding structural weakening and leakage hazards caused by secondary drilling on the membrane. Finally, through ground cushioning measures, the integrity of the membrane during the landing stage is ensured.

[0013] In some embodiments, the inflation debugging in step S5 comprises the following steps: S51, install and debug the low-voltage distribution cabinet and generator set in the power distribution room, remove the scaffolding of the air film peripheral retaining wall, and wrap the air film outer wall bridge and fan corners with cotton felt; S52, first start the fan at the large equipment and increase the air volume, and then uniformly and successively start the fans in other areas after the membrane in this area is raised; S53, when the membrane is pressurized to the design height, check whether the membrane at the inner membrane surface, the surrounding connecting points and the corner parts of the pressurized connecting piece is damaged, and continue to pressurize to the design pressure after confirming that there is no damage; S54, if the film body is not shaped in coordination during the inflation process, the film material position is adjusted to the relaxed state by lifting the pressure, the film body above the device is blown up preferentially, the problem that the film material and the cable net are most likely to be caught by the device is effectively solved, the film body is guided to safely escape from the device and smoothly shaped according to the predetermined path, the local wrinkles or stress concentration is fine-tuned by lifting the pressure, and the accuracy and structural safety of the final form of the air film building are ensured.

[0014] In some embodiments, a quality safety control step is further included, and the quality safety control step comprises: S61, the hoisting height of the air film, the synchronous drop of the multiple cranes and the local stress of the film material are measured in real time, and the integrity of the large device protection layer is observed; S62, when the wind speed is greater than 4 levels during the construction process, the work is stopped, and the cable wind rope is used to fix the film body; S63, the strain strips are pre-pasted at the film material joint seams, and the alarm is triggered when the strain value exceeds the limit. Through the above steps, a multi-parameter (height, drop, stress, wind speed) safety monitoring network throughout the whole process before, during and after hoisting is constructed, and an emergency triggering mechanism (such as four-level wind stoppage and strain strip alarm) is preset, the key risk factors are sensed and responded in real time, and the guarantee ability of construction safety under complex working conditions is improved.

[0015] In some embodiments, before the step S3 is performed, film assembly is further performed, and the film assembly comprises the following steps: S01, the film material installation area is divided into a hoisting area and a non-hoisting area, the film material is installed from one end of the non-hoisting area, the net cable is synchronously installed in the same order, and the installation is connected with the hoisting area. The complex full-field film assembly work is optimized for construction organization, the installation of the device-free interference area is completed first, the working surface and preparation time are cleared for the subsequent core and high-difficulty cross-device hoisting operation, and the overall construction efficiency is improved.

[0016] In some embodiments, the nondestructive testing in the step S12 adopts penetration detection, and the peripheral pull rods and guardrails of the large device are both soft-packed with flame-retardant cotton felt. By using penetration detection for nondestructive testing of the weld, the safety and reliability of the buffer structure itself are ensured; at the same time, the pull rods, guardrails and the like are required to be fully soft-packed, the dead angle of protection is eliminated, a flexible protection interface without omission and in all directions is formed, and the reliability of the entire protection system is further improved.

[0017] Compared with the prior art, the present application has the following advantages and beneficial effects: 1. The large equipment is protected by protective treatment, so that the large equipment can be protected in construction without disassembly, and the safety and feasibility of the subsequent lifting scheme are ensured through structure calculation. In addition, through the cooperation of multiple cranes and distributed lifting point clamps, the whole membrane structure assembled in advance is directly lifted and transported across the original equipment, so that the existing inherent logic of disassembly before construction is replaced, and the high cost of equipment disassembly, reinstallation and production loss is saved. More efficient lifting operation is realized by converting the occupied period due to disassembly, and the cost and period are greatly optimized. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor. In the drawings: Figure 1 Workflow diagram for the present application; DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the present application more clear and obvious, the following will further describe the present application in combination with embodiments and drawings. The exemplary embodiments of the present application and their descriptions are only used to explain the present application, and are not regarded as a limitation on the present application.

[0020] Throughout the specification, the mention of "one embodiment", "an embodiment", "one example" or "an example" means that the specific features, structures or characteristics described in connection with the embodiment or example are included in at least one embodiment of the present application. Therefore, the phrases "one embodiment", "an embodiment", "one example" or "an example" appearing throughout the specification do not necessarily refer to the same embodiment or example. In addition, specific features, structures or characteristics can be combined in one or more embodiments or examples in any appropriate combination and / or subcombination. In addition, those skilled in the art should understand that the drawings provided herein are for illustrative purposes only, and the drawings are not necessarily drawn to scale. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0021] In the description of the present application, the terms "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the scope of protection of the present application.

[0022] The terms "first", "second" and the like used in the present application are only for the purpose of distinguishing the corresponding parts for the sake of clear description, and are not intended to limit any order or emphasize importance. In addition, the term "connection" used herein can be direct connection or indirect connection via other components without special description. Embodiment

[0023] As Figure 1 shown, the present embodiment provides a gas film hoisting construction method for avoiding equipment occupation, comprising the following steps: S1, protecting and treating the large equipment on site; S2, performing structure calculation according to the site conditions and the parameters of the large equipment; S3, matching steel pipe hoisting beams and distributed hoisting point clamps, and synchronously lifting the membrane cable combination unit according to the preset operation radius, wherein the membrane cable combination unit spans the large equipment; S4, controlling the hoist to synchronously lower the membrane cable combination unit, and completing the membrane material positioning; S5, inflating and debugging the positioned membrane material.

[0024] Specifically, the protection and treatment in step S1 comprises the following steps: S11, removing the protruding parts on the large equipment, and retaining the installation positioning marks of each protruding part, wherein the protruding parts include an anemometer, a lighting lamp, a monitoring camera and a sensor; S12, welding arc-shaped steel pipes at sharp edge regions of the large equipment, performing non-destructive testing on the welds after welding, and smearing fireproof mortar at the welds, wherein the sharp edge regions include a bucket wheel edge, a machine body inclined pull rod and a guardrail interface; S13, wrapping the regions possibly contacted by the large equipment and the membrane material with 10mm-thick flame-retardant cotton felt, and additionally stacking 20mm-thick special nylon rubber plates on the bucket of the bucket wheel machine, wherein the flame-retardant cotton felt is fixed by iron wire at a spacing of not more than 300mm. By removing the protruding parts, the risk of cutting and friction of the membrane material by the edges of the equipment is eliminated through welding arc-shaped steel pipes and flexible wrapping, so that the safety of the valuable existing large equipment and the newly-built membrane material is ensured during the whole process of membrane material spanning, covering and inflation, so as to realize construction without shutdown.

[0025] Specifically, the structure calculation in the step S2 includes crane selection calculation, hoist beam deflection calculation and steel wire rope selection calculation, the working amplitude of the crane is not less than 22 m, the main arm length is not less than 45.1 m, the rated lifting capacity of the crane is not less than 1.4 times of the actual lifting load, and the actual lifting load is the product of the self weight of the membrane cable combined unit and the dynamic load coefficient. Through the structure calculation, it is ensured that the hoisting system (crane, hoist beam and rigging) has sufficient carrying capacity and safety margin, and major engineering risks such as hoisting imbalance or structure failure caused by calculation omission are effectively prevented.

[0026] Lug plate parameters: Lug plate thickness δ: 20 mm; pin hole diameter d: 38 mm; outer contour radius a: 40 mm; pin hole height H: 70 mm; Lug width B: 175 mm; plate hole radius r: 19 mm; reinforcement ring plate thickness t2: 6 mm; the reinforcement ring plate thickness is valued at 0.8.

[0027] The immediate bearing stress of the lug hole is: ; The local immediate bearing stress meets the requirements.

[0028] ; The hole wall tensile stress of the lug hole is: .

[0029] Steel wire rope calculation: The actual force of the steel wire rope is: P=Q / 4sina; In the formula: P-the tension of the steel wire rope (KN); Q-the weight of the lifting equipment (KN); n-the number of steel wire ropes used; a-the angle between the steel wire rope and the beam surface; Then the actual force of the steel wire rope is P=7.56×9.8 / (4×sin42)=27.65 KN.

[0030] Safety factor=417 / 27.65=15.1, so the diameter Φ26 mm, specification 36×7+FC fiber core steel wire rope meets the requirements.

[0031] Specifically, before the synchronization lifting in the step S3, the following preparation steps are further included: S31, real-time monitoring of construction environment wind; S32, each of the cranes is provided with a laser range finder with an accuracy of ±1mm, a strain sensor is installed on the distributed lifting point clamp, and the strain sensor is electrically connected with a data acquisition terminal. The digital information of the lifting process is constructed through the laser range finder and the strain sensor, high-precision synchronous control data and structural stress information are provided for the commander to realize precise cooperation of multiple cranes, uniform distribution of load, and controllable process risk data basis.

[0032] Specifically, the synchronous lifting in the step S3 includes the following steps. S301, control 4-5 cranes to start synchronously, and monitor the lifting height of each crane in real time during the lifting process, and the synchronous difference of multiple cranes is not greater than 50mm; S302, the strain sensor monitors the stress of the lifting point in real time, and when the stress of the lifting point exceeds 1.2 times of the design value, the lifting is paused and the stress of the lifting point is adjusted; S303, the lifting height of the membrane-cable combined unit is higher than 15m from the top of the large equipment. By setting the precise operation (such as the synchronous difference ≤50mm, the stress exceeding 1.2 times is adjusted), through dynamic monitoring and feedback control, the membrane load is balanced, and the local overload, tearing or collision with the equipment caused by asynchronization is fundamentally avoided.

[0033] Specifically, when the step S4 is performed, the following steps are further included. S41, when the membrane-cable combined unit is lowered to 200mm from the top of the large equipment, the crane is paused, and the membrane is manually guided to cover the protective layer of the large equipment; S42, after the membrane is landed, the steel pipe lifting beam is removed, and the distributed lifting point clamp is reserved as a permanent connecting piece for fixing the membrane; S43, fireproof cloth is laid around the large equipment, and foam board is added in the contact area between the membrane and the ground. First, the soft contact between the membrane and the protective layer of the equipment is realized through air suspension and manual guidance, impact damage is prevented, the lifting clamp is reserved as a permanent connecting piece, structural weakening and leakage hidden danger caused by secondary drilling on the membrane are avoided, and finally, the ground cushioning measures are taken to ensure the integrity of the membrane during the landing stage.

[0034] Specifically, the inflation debugging in the step S5 includes the following steps. S51, install and debug the low-voltage distribution cabinet and generator set in the power distribution room, remove the scaffolding of the air film peripheral retaining wall, and wrap the air film outer wall bridge and the fan corners with cotton felt; S52, first, open the fan at the large equipment and increase the air volume, and then open the fans in other areas one by one after the membrane in this area is lifted; S53, when the membrane is pressurized to the design height, check whether the membrane material at the membrane surface, the connecting points around the periphery and the connecting points at the corner parts of the pressurized membrane is damaged, and continue to pressurize to the design pressure after confirming that there is no damage; S54, if the membrane body is not coordinated during the inflation process, adjust the position of the membrane material to the relaxed state through the lifting pressure, effectively solve the problem that the membrane material and the cable net are most likely to be hung by the equipment, guide the membrane body to safely separate from the equipment according to the predetermined path and smoothly form, and further adjust the lifting pressure to eliminate local wrinkles or stress concentration, and ensure the accuracy and structural safety of the final form of the air-supported building.

[0035] Specifically, the quality safety control step further comprises: S61, measure the air-supported hoisting height, the synchronous drop of multiple cranes and the local stress of the membrane material in real time, and observe the integrity of the large equipment protection layer; S62, suspend the work when the wind speed is greater than 4 during the construction process, and fix the membrane body by using the cable wind rope; S63, pre-paste the strain strip at the membrane material joint, and trigger the alarm when the strain value exceeds the limit. Through the above steps, a multi-parameter (height, drop, stress, wind speed) safety monitoring network throughout the whole process before, during and after hoisting is constructed, and an emergency triggering mechanism (such as four-grade wind stoppage and strain strip alarm) is preset, the key risk factors are sensed and responded in real time, and the safety guarantee ability of construction under complex working conditions is improved.

[0036] Specifically, the membrane assembly before performing the step S3 further comprises the following steps: S01, divide the membrane material installation area into a hoisting area and a non-hoisting area, and install the membrane material from one end of the non-hoisting area, simultaneously install the cable net in the same order until the hoisting area is connected. The complex whole-field membrane assembly work is optimized for construction organization, the installation of the area without equipment interference is completed first, the working surface and preparation time for the subsequent core and high-difficulty cross-equipment hoisting operation are cleared, and the overall construction efficiency is improved.

[0037] Specifically, the nondestructive testing in the step S12 adopts penetration detection, and the peripheral tie rods and guardrails of the large equipment are all soft-packed with flame-retardant cotton felt. The penetration detection is used for nondestructive testing of the welds to ensure the safety and reliability of the buffer structure itself; at the same time, the tie rods, guardrails and the like are comprehensively soft-packed, the dead angle of protection is eliminated, a flexible protection interface without omission and in all directions is formed, and the reliability of the whole protection system is further improved.

[0038] The above detailed description of the specific embodiments of the present application has been given to understand the purpose, technical solutions and beneficial effects of the present application. It should be understood that the above description is only a specific embodiment of the present application and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A gas film hoisting construction method for avoiding equipment occupation, characterized in that, The method comprises the following steps: S1, protective treatment is performed on the large equipment on site; S2, structural calculation is performed according to the conditions on site and the parameters of the large equipment; S3, steel pipe hanger beams and distributed hanger point clamps are matched, and a membrane cable combination unit is synchronously lifted according to a preset operation radius, the membrane cable combination unit spans the large equipment; S4, the hoist synchronously lowers the membrane cable combination unit, and the membrane material is positioned; S5, the membrane material after positioning is inflated and debugged.

2. The air film hoisting construction method that evades the equipment placeholder according to claim 1, its characterized in that, The protective treatment in the step S1 comprises the following steps: S11, protruding parts on the large equipment are removed, and installation positioning marks of the protruding parts are reserved, the protruding parts comprising an anemograph, an illuminating lamp, a monitoring camera and a sensor; S12, arc-shaped steel pipes are welded at sharp edge regions of the large equipment, the sharp edge regions comprising a bucket wheel edge, a machine body inclined pull rod and a guardrail interface, welds are nondestructively detected, and fireproof mortar is applied at the welds; S13, 10mm-thick flame-retardant cotton felt is used to wrap regions of the large equipment that can be contacted by the membrane material, and 20mm-thick special nylon rubber plates are additionally overlaid on the bucket wheel excavator.

3. The air film hoisting construction method that evades the equipment placeholder according to claim 1, its characterized in that, The structural calculation in the step S2 comprises hoist selection and calculation, hanger beam deflection calculation and steel wire rope selection calculation.

4. The air film hoisting construction method that evades the equipment placeholder according to claim 1, its characterized in that, Before the synchronous lifting in the step S3 is performed, the following preparation steps are further included: S31, the construction environment wind force is monitored in real time; S32, a laser range finder is arranged on each of the hoists, and a strain sensor is arranged on the distributed hanger point clamp, and the strain sensor is electrically connected with a data acquisition terminal.

5. The air film hoisting construction method that evades the equipment placeholder according to claim 4, its characterized in that, The synchronous lifting in the step S3 comprises the following steps: S301, four of the hoists are synchronously started, the hoisting heights of the hoists are monitored in real time during the lifting process, and the synchronous differences of the hoists are not greater than 50mm; S302, the strain sensor monitors the hanger point stress in real time, when the hanger point stress exceeds 1.2 times of a design value, the lifting is paused and the hanger point stress is adjusted; S303, the hoisting height of the membrane cable combination unit is higher than 15m of the top of the large equipment.

6. The air film hoisting construction method that evades the equipment placeholder according to claim 1, its characterized in that, When the step S4 is performed, the following steps are further included: S41, when the membrane cable combination unit is lowered to 200mm from the top of the large equipment, the hoists are paused, and the membrane material is manually guided to cover the protective layer of the large equipment; S42, after the membrane material is landed, the steel pipe hanger beams are removed, and the distributed hanger point clamps are reserved as permanent connecting parts for fixing the membrane material; S43, fireproof cloth is laid around the large equipment, and foam plates are added at regions where the membrane material contacts the ground.

7. The air film hoisting construction method that evades the equipment placeholder according to claim 1, its characterized in that, The inflation and debugging in the step S5 comprises the following steps: S51, a low-voltage distribution cabinet and a generator set of a power distribution room are installed and debugged, a gas film peripheral retaining wall scaffold is removed, and cotton felt is used to wrap a gas film outer wall bridge and a fan corner; S52, the fan at the large equipment is first started and the air volume is increased, and after the membrane material in the region is lifted, the fans in other regions are uniformly and successively started; S53, when the membrane body is pressurized to a design height, whether the membrane material at the inner membrane surface, the surrounding connecting points and the corner parts of the pressurizing connecting parts is damaged is checked, and after it is confirmed that there is no damage, the pressurization is continued to a design pressure; S54, if the film body is not shaped in coordination during the inflation process, adjust the film material position to the relaxed state by adjusting the pressure.

8. The air film hoisting construction method that evades the equipment placeholder according to claim 1, its characterized in that, Further comprising a quality safety control step, which includes: S61, measure the air film hoisting height, the synchronous drop of multiple cranes and the local stress of the film material in real time, and observe the integrity of the large equipment protection layer; S62, suspend the work when the wind speed is greater than 4 levels during the construction process, and use the cable wind rope to fix the film body; S63, pre-paste strain strips at the film material joint, and trigger an alarm when the strain value exceeds the limit.

9. The air film hoisting construction method that evades the equipment placeholder according to claim 1, its characterized in that, Before performing the step S3, film material assembly is also performed, which includes the following steps: S01, divide the film material installation area into hoisting area and non-hoisting area, and install the film material from one end of the non-hoisting area, and install the net rope in the same order at the same time, until the connection with the hoisting area.

10. The air film hoisting construction method that evades the equipment placeholder according to claim 2, its characterized in that, The non-destructive testing in the step S12 adopts penetration detection, and the large equipment peripheral pull rod and guardrail are both soft-packed protected by flame-retardant cotton felt.

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