Bamboo shed structure controlled disintegration method under fire danger emergency

Abstract

The invention discloses a bamboo shed structure controlled disintegration method under fire emergency, which comprises the following steps of: in a bamboo shed building stage, sequentially winding a high-strength steel wire rope from a horizontal main bearing shed bamboo on the topmost layer to a horizontal main bearing shed bamboo on the bottommost layer layer by layer to form a flexible traction framework; a special traction sliding shoe device is preset at the bottom wall foot of the bamboo shed; after an emergency instruction is issued, the tail end of a steel wire rope arranged in advance and a traction sliding shoe device are rapidly and reliably connected with traction equipment deployed on site; an operator applies slow, stable and synchronous traction force to the steel wire rope and the traction sliding shoe device through traction equipment according to the unified instruction, so that the force transmission path of the structure is cut off in order, and the bamboo shed is guided to be disassembled in a segmented mode in the preset direction. According to the method, a'preset weak path 'is created in a bamboo shed structure system through pre-arrangement, external input traction force is guided to be released according to a set path, and therefore the structure is rapidly disassembled according to a preset sequence and mode.

Description

Technical Field

[0001] This invention relates to a method for the rapid dismantling of mid- to high-rise bamboo sheds, specifically a method for the controlled dismantling of bamboo shed structures under fire emergency conditions. Background Technology

[0002] In the construction and maintenance of old buildings, bamboo scaffolding is widely used due to its lightweight, low cost, and adaptability to complex structures. However, this material poses a significant fire hazard: bamboo itself is flammable, and when used in high-rise buildings, fire can spread rapidly upwards with the help of wind, easily forming an uncontrollable three-dimensional fire. An even more serious challenge is that the working height of rescue equipment such as fire ladders is usually limited (mostly 30 to 50 meters). Once the fire on the bamboo scaffolding outside the building exceeds this limit, effective external firefighting becomes extremely difficult. This predicament often renders traditional rescue methods ineffective, not only making firefighting efforts extremely difficult but also greatly threatening the lives of people inside the building. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and propose a controlled disintegration method for bamboo shed structures under fire emergency conditions. By pre-planning, a "pre-set weak path" is created in the bamboo shed structure system to guide the external energy (traction force) to be released along a predetermined path, thereby enabling the structure to disintegrate rapidly in a preset sequence and pattern.

[0004] To achieve the above objectives, the technical solution specifically adopted by the present invention is as follows:

[0005] A controlled dismantling method for bamboo shed structures under fire emergency conditions includes the following steps:

[0006] S1, Pre-set Disassembly Guidance System:

[0007] During the bamboo shed construction phase, high-strength steel wire ropes are wound layer by layer from the top horizontal main load-bearing bamboo shed to the bottom horizontal main load-bearing bamboo shed to form a flexible traction frame; and a special traction slipper device is pre-installed at the bottom wall foot of the bamboo shed.

[0008] S2, Connect to emergency response agencies:

[0009] After the emergency order is issued, the pre-deployed wire rope ends and traction slipper devices are quickly and reliably connected to the traction equipment deployed on site.

[0010] S3, Trigger controlled directional disintegration:

[0011] Operators, following unified instructions, apply slow, steady, and synchronous traction force to the steel wire rope and traction slipper device through traction equipment, thereby systematically cutting off the force transmission path of the structure and guiding the bamboo shed to disintegrate in sections along a predetermined direction.

[0012] Furthermore, during the bamboo shed construction phase, each layer of bamboo is securely connected to the uprights using C-shaped fixing clamps. The inner diameter of the C-shaped fixing clamps should be 5-10mm larger than the diameter of the bamboo being fixed to accommodate the buffer pad layer. The opening angle is 90 degrees, which allows for easy insertion of the bamboo and also creates a self-locking effect under stress to prevent slippage.

[0013] Furthermore, in step S1, a flexible traction skeleton is formed through the following steps:

[0014] The first round of high-strength steel wire rope is used to fix the top horizontal main load-bearing bamboo of the bamboo shed, thereby establishing the highest stress point of the entire traction system.

[0015] After the steel wire rope is laid out at the top layer, it extends directly downwards without interruption, wrapping around each layer of horizontal bamboo below it in sequence to form a continuous force transmission path. Through this continuous winding from top to bottom, the high-strength steel wire rope connects all the horizontal bamboo into an integral flexible traction frame.

[0016] Furthermore, the traction equipment includes bulldozers, large fire trucks, and excavators.

[0017] Furthermore, the wire rope should be of appropriate diameter and strength depending on the height and width of the scaffold.

[0018] Furthermore, the ends of the wire rope are made into rigging using braiding or compression methods to facilitate quick and reliable connection with the traction equipment.

[0019] Furthermore, in step S2, a high-strength pin or a self-locking quick-connect device is used to reliably connect the end of the wire rope, the traction slipper device, and the output end of the traction equipment. The connection process ensures the coaxiality of the interface and avoids eccentric loads.

[0020] Compared with existing technologies, the "Controlled Dismantling Method for Bamboo Shed Structures under Fire Emergency" provided by this invention, through its forward-looking system pre-setting and precise execution control, achieves a fundamental shift from "passive post-disaster rescue" to "proactive pre-disaster defense," specifically reflected in the following four aspects:

[0021] I. Safety has achieved a qualitative leap.

[0022] Traditional bamboo shed fires often result in rescue efforts being hampered by height limitations, leaving people helpless. However, this invention completely changes the safety paradigm through the synergistic effect of a "pre-set dismantling guidance system" and a "traction slipper device."

[0023] It avoids working at heights: By pre-setting a complete system during the construction phase, personnel do not need to climb to dangerous areas to tie cables or cut during emergencies, fundamentally eliminating the greatest risk of injury or death for firefighters in the fire scene.

[0024] The disaster area was controlled: guiding the bamboo shed to "fold inward" or "disintegrate in sections" in a predetermined direction can effectively prevent sparks from flying and debris from accumulating, ensure unobstructed fire lanes, and protect the safety of surrounding buildings and people.

[0025] Secondary risks are reduced: The "controlled directional disintegration" mechanism is like planning a "safe fall zone" for the bamboo shed, minimizing the impact and damage to the building structure and underground pipelines caused by disorderly collapse.

[0026] II. Emergency response and handling efficiency doubled

[0027] This invention simplifies complex demolition projects in extreme environments into a standardized and rapidly executable "connect-trigger" process, enabling rapid handling within minutes.

[0028] Extremely fast response: After the emergency command is issued, the operator only needs to complete the rapid docking of the traction equipment and the pre-buried system on the ground. The response time is shortened from several hours in the traditional method to several minutes, winning a valuable "golden window" for controlling the spread of fire.

[0029] Efficient resource allocation: It eliminates the need to deploy a large number of high-altitude workers and specialized machinery, significantly saving human resources and high-end equipment costs.

[0030] III. High degree of controllability and predictability of the disintegration process

[0031] The outcome is predictable: based on the pre-deployed "flexible traction frame", it is ensured that when disintegration is triggered, the collapse mode of the bamboo shed is "programmed" in advance, rather than relying on the temporary experience and judgment of the operators, thus eliminating human error.

[0032] Possesses corrective capabilities: By fine-tuning the force application speed at different traction points, the dismantling process can be adjusted in real time, ensuring the success rate and robustness of emergency operations. Adjustable force: Controlled by "slow, smooth, and synchronized traction force," it achieves a "soft landing" of the massive structural kinetic energy, rather than hard destruction such as explosions or forced pulling.

[0033] IV. Technological Universality and Strategic Value

[0034] High adaptability: The core principle of this method enables it to adapt to bamboo sheds of different heights and structural forms, and it has good prospects for promotion and application.

[0035] It addresses a key shortcoming in urban public safety by providing a complete set of standardized and replicable technical solutions to address the numerous old building maintenance scenarios encountered during urban renewal.

[0036] Moving the risk control point forward: It transforms the uncontrollable fire risks of the traditional model into a manageable and orderly emergency operation process, thereby enhancing the overall resilience of the city. Attached Figure Description

[0037] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0038] Figure 1 This is a flowchart illustrating a controlled dismantling method for a bamboo shed structure under fire emergency conditions, as described in an embodiment of the present invention. Detailed Implementation

[0039] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0040] like Figure 1 As shown in the figure, this invention provides a controlled dismantling method for bamboo shed structures under fire emergency conditions, including the following steps:

[0041] S1, Pre-set Disassembly Guidance System:

[0042] During the bamboo shed construction phase, high-strength steel wire ropes are wound layer by layer from the top horizontal main load-bearing bamboo shed to the bottom horizontal main load-bearing bamboo shed. Each layer of bamboo shed is then securely connected to the uprights using C-shaped fixing clamps to form a flexible traction frame. This design aims to mechanically integrate the originally loose bamboo poles into a controllable whole. It's like having an "invisible nervous system" pre-installed on the bamboo shed, capable of efficiently and orderly transmitting and distributing a single, concentrated traction force applied externally to every critical structural node under emergency commands. This ensures that the disintegration process is not a random collapse, but a chain-like structural failure occurring along a predetermined path. Preferably, to ensure the effectiveness of the towing, layered towing is generally adopted, with each floor typically consisting of two layers of frames. Every 10 layers, the frames are locked, and a 1.5-2m gap in the steel wire rope is reserved between adjacent groups. After pulling 10 layers, the frame is connected to the output end of the traction equipment through the gap in the steel wire rope before pulling again. Specifically, when the first section collapses under stress, the pre-installed gap is straightened, and the second section begins to bear the force. Through the force transmission of the steel wire rope, the supporting force of the second section is destroyed, and it collapses as well. This process continues, and the pulling force only needs to be able to cope with the supporting force of each section plus the self-weight of the collapsed section, thus allowing the structure to collapse one section after another like stacked tiles.

[0043] At the base of the bamboo shed, a special traction sliding shoe device is pre-installed; this design is to fundamentally overcome the enormous static friction between the bottom of the bamboo shed and the building facade. This device replaces static friction with sliding friction, aiming to achieve a "breakthrough start," allowing the entire massive bamboo shed structure to generate initial displacement under external force, creating the prerequisites for subsequent continuous folding and disassembly.

[0044] S2, Connect to emergency response agencies:

[0045] After the emergency order is issued, the pre-deployed wire rope ends and traction slipper devices should be reliably connected to the traction equipment deployed on site; specifically:

[0046] S2.1 Command Confirmation and Equipment Positioning: Based on the fire assessment report, the commander clearly issues the dismantling command, and the operation team quickly locates the pre-deployed traction equipment and adjusts it to standby status;

[0047] S2.2 Connector Inspection and Quick Connection: Inspectors check the integrity of the end joints of the pre-embedded wire rope and the pull rings of the traction slipper to ensure that there is no rust or deformation. Then, using a high-strength pin or a self-locking quick-connect device, the wire rope is reliably connected to the output end of the traction equipment. During the connection process, the coaxiality of the interface is ensured to avoid eccentric loads.

[0048] S2.3 System Redundancy Verification: Tension pre-tests are performed on all connection points to confirm that each force transmission path is unobstructed, and a second operator verifies the results, establishing a dual-person confirmation mechanism to ensure absolute safety.

[0049] S3, Trigger controlled directional disintegration:

[0050] Operators, following unified instructions, apply slow, steady, and synchronized traction force to the wire rope and traction slipper device using traction equipment, thereby systematically cutting off the force transmission path of the structure and guiding the bamboo shed to disintegrate in sections along a predetermined direction; specifically:

[0051] S3.1 Synchronous Force Application Start-up: Operators start all traction equipment synchronously according to the unified instructions from the command center. Initially, traction force is applied slowly and steadily at the lowest gear, while closely monitoring the tension sensor readings to ensure that the force is balanced at each point.

[0052] S3.2 Orderly Cutting and Disintegration Guidance of Force Transmission Path: The continuously applied traction force will act on key nodes in a preset sequence: First, the sliding shoe device overcomes the static friction at the bottom, causing the bamboo shed base to generate initial displacement; second, as the base moves and the traction force continues to increase, the steel wire ropes laid from top to bottom will be tensioned layer by layer. This tension will be precisely transmitted to the connection point between each upright and the bamboo shed (this connection has been preset as a controllable weak point through C-type fixing clamps), causing the mortise and tenon connections or binding points between the bamboo materials to fail sequentially due to reaching their ultimate strength. At the same time, when the traction force is applied at the bottom, the force will be instantly transmitted to each layer through the steel wire ropes. This will cause each layer of horizontal bamboo shed to be subjected to a strong inward cohesive pull, thereby guiding the entire bamboo shed structure to collapse in an orderly "folding" manner in the predetermined direction, like an accordion.

[0053] S3.3 Dismantling Process Monitoring and Emergency Adjustment: During the folding and segmented dismantling of the bamboo shed, observers continuously monitor its trajectory to ensure it aligns with the predetermined direction. Minor deviations can be corrected in real-time by fine-tuning the force applied at different traction points. The entire dismantling process aims for an inward collapse to minimize the impact of splashing on the surrounding safe zone.

[0054] In practice, the high-strength steel wire ropes must be installed and secured simultaneously during the bamboo shed construction, along with the installation of bottom traction slippers. All pre-built components must possess good weather resistance and concealment, ensuring the bamboo shed's normal use is not affected. In an emergency, the commander, based on factors such as fire location, wind direction, and wind speed, comprehensively assesses and selects the safest dismantling direction (usually tilting inwards), then orders the execution of steps S2 and S3. The application of traction force must adhere to the principle of "slow start, smooth acceleration, and synchronous maintenance," using tension sensors to monitor the force at each point, ensuring the dismantling process proceeds in an orderly, domino-like manner, rather than collapsing instantly.

[0055] In this embodiment, the inner diameter of the C-type fixing clamp should be 5-10mm larger than the diameter of the bamboo material being fixed to accommodate the buffer pad. The opening angle is 90 degrees. This angle can not only easily fit the bamboo material, but also generate a self-locking effect when under force to prevent slippage.

[0056] In this embodiment, in step S1, a flexible traction skeleton is formed through the following steps:

[0057] The first round of high-strength steel wire rope is used to fix the top horizontal main load-bearing bamboo of the bamboo shed, thereby establishing the highest stress point of the entire traction system.

[0058] After the steel wire rope is installed at the top layer, it extends continuously downwards, wrapping around each layer of horizontal bamboo below, forming a continuous force transmission path. Through this continuous "top-down" winding, the high-strength steel wire rope connects all the horizontal bamboo into a unified, flexible traction frame. The technical advantages of this design are mainly reflected in the following aspects: Disrupting horizontal stability: The overall stability of the bamboo shed is highly dependent on the "ring beam" effect formed by each layer of horizontal bamboo. Applying the steel wire rope directly to the horizontal members can most directly and effectively undermine this stability during traction, forcing the structure to become unstable. Achieving "folding" disintegration: When traction is applied at the bottom, the force is instantly transmitted to each layer through the steel wire rope. This causes each layer of horizontal bamboo to experience a strong inward cohesive pull, guiding the entire bamboo shed structure to collapse in an orderly "folding" manner, like an accordion, rather than a dangerous "spraying" collapse. Maximizing energy efficiency: The horizontal members are the "ribs" of the structure. By directly pulling on the "ribs," a relatively small traction force can achieve the effect of "using four ounces to move a thousand pounds," triggering a chain reaction of failure in the entire structure.

[0059] In this embodiment, the traction equipment includes bulldozers, large fire trucks, and excavators. Models with a tonnage between 20 and 30 tons and sufficient boom extension should be selected to ensure that the applied force angle is consistent with the demolition direction.

[0060] In this embodiment, the steel wire rope can be configured with different strengths according to the height of the floor. For example, a 6×37+FC type galvanized steel wire rope with a diameter of not less than 12mm is used, and its nominal tensile strength is not less than 1770MPa.

[0061] To facilitate quick and reliable connection with subsequent traction equipment, the ends of the wire rope are made into rigging using alloy casting or compression fitting methods.

[0062] In summary, the "Controlled Dismantling Method for Bamboo Shed Structures under Fire Emergency" provided by this invention, through its forward-looking system pre-setting and precise execution control, achieves a fundamental shift from "passive post-disaster rescue" to "proactive pre-disaster defense": 1) Controllable dismantling process: Through a pre-set "guided path" and precise traction control, the bamboo shed is ensured to fold inward and collapse in sections, minimizing the impact on the surrounding environment. 2) Rapid and efficient response: It eliminates the dangerous step of temporarily searching for demolition points at the fire scene, achieving "second-level start-up" and buying precious time for life rescue. 3) Significantly improved safety: It avoids rescue personnel performing high-intensity, high-risk operations in dangerous environments.

[0063] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for controlled dismantling of a bamboo shed structure under fire emergency conditions, characterized in that: Includes the following steps: S1, Pre-set Disassembly Guidance System: During the bamboo shed construction phase, high-strength steel wire ropes are wound layer by layer from the top horizontal main load-bearing bamboo shed to the bottom horizontal main load-bearing bamboo shed to form a flexible traction frame; and a special traction slipper device is pre-installed at the bottom wall foot of the bamboo shed. S2, Connect to emergency response agencies: After the emergency order is issued, the pre-deployed wire rope ends and traction slipper devices are quickly and reliably connected to the traction equipment deployed on site. S3, Trigger controlled directional disintegration: Operators, following unified instructions, apply slow, steady, and synchronous traction force to the steel wire rope and traction slipper device through traction equipment, thereby systematically cutting off the force transmission path of the structure and guiding the bamboo shed to disintegrate in sections along a predetermined direction.

2. The controlled dismantling method for bamboo shed structures under fire emergency conditions as described in claim 1, characterized in that: During the bamboo shed construction phase, each layer of bamboo is securely connected to the uprights using C-shaped fixing clamps. The inner diameter of the C-shaped fixing clamps should be 5-10mm larger than the diameter of the bamboo being fixed to accommodate the cushioning layer, and the opening angle should be 90 degrees.

3. The controlled dismantling method for bamboo shed structures under fire emergency conditions as described in claim 1, characterized in that: In step S1, the flexible traction frame is formed through the following steps: The first round of high-strength steel wire rope is used to fix the top horizontal main load-bearing bamboo of the bamboo shed, thereby establishing the highest stress point of the entire traction system. After the steel wire rope is installed at the top layer, it extends directly downwards without interruption, successively encircling the horizontal bamboo sheds below each layer to form a continuous force transmission path.

4. The controlled dismantling method for bamboo shed structures under fire emergency conditions as described in claim 1, characterized in that: The traction equipment includes bulldozers, large fire trucks, and excavators.

5. The controlled dismantling method for a bamboo shed structure under fire emergency conditions as described in claim 1, characterized in that: The steel wire rope should be of appropriate diameter and strength according to the height and width of the scaffold.

6. The controlled dismantling method for a bamboo shed structure under fire emergency conditions as described in claim 1, characterized in that: The ends of the wire rope are made into rigging using either braiding or compression sleeving methods.

7. The controlled dismantling method for a bamboo shed structure under fire emergency conditions as described in claim 1, characterized in that: In step S2, a high-strength pin or a self-locking quick-connect device is used to reliably connect the end of the wire rope, the traction slipper device, and the output end of the traction equipment. During the connection process, the coaxiality of the interface is ensured to avoid eccentric loads.

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