How to use concrete silent cutting to dismantle larger structures?
1. Main Hole Cutting Equipment
Hydraulically or electrically powered static cutting systems, equipped with a range of jackhammers, delivering powerful power and rapid performance.
2. Cutting Technology
3. Concrete Cutting Construction Techniques
Static cutting involves dismantling concrete structures using specialized concrete cutting machinery. The advantage is that it has minimal impact on the original structure. Considering the construction schedule and economic factors, the project proposes to use the method of drilling holes on the edges and chiseling in the center for concrete removal.
The process offers the following advantages: minimal impact on the existing structure; less dust and reduced environmental impact; quick, with short noise time; no need for hoisting during cutting blocks, resulting in a shorter construction period.
(1) Floor cutting and edging
The flooring should first cut the four open sides, then place the cut pieces on a support platform and crush them with a crusher. Air selection.
The technical challenge lies in ensuring that the blade does not cut into the supporting platform while maintaining the stability and security of the platform. The solution is to accurately route the wiring during the platform assembly, making sure the distance between the supporting platform crossbar on the cutting line and the ground is greater than the radius of the blade.
(2) Concrete wall cutting and beveling
For concrete wall cutting and chamfering, use a wire saw system (wall saw system) to first cut the three sides of the hole, then cut the fourth side only to sever the steel bars. Afterward, use a pickaxe to open it up.
4. Key Points of Cutting Construction Technology
Pre-processing of front corner before cutting to avoid over-cutting. Before cutting, calculate the over-cut value a based on the diameter of the cutting saw blade and the thickness of the cutting block, where a = [(R2 - r2)1/2 - (R2 - (r + b)2)1/2]
Corner Cutting Calculation
Based on the wall thickness and blade, calculate a=; overcutting is not allowed at the corners. Corner preprocessing must be on the inside of the pre-cut hole, tangent to the cutting line, with the hole radius r≥a.
Pre-processing for angle cutting
(2) Protection of the original structure during the cutting process
1) Prior to using an air chisel, cut the reinforcing steel in the concrete to prevent vibration during the cutting process that could affect the connection between the concrete and steel in the original structure.
2) Temporary storage locations for cutting blocks or crushed concrete must be areas where the floor can support heavy loads (such as at column-beam connections), and these locations should be kept away from openings.
(3) Drilling Hammer Noise Reduction Measures
No jackhammer work during residents' rest hours. Any construction beyond the permitted hours must have approval procedures from the competent authorities and explanations from the surrounding community. To ensure construction activities during normal hours do not disturb residents, soundproofing facilities should be set up at the ventilation points, and enclosed soundproofing walls should be installed.
(4) Security Zone Setup
Work areas should be equipped with safety warning signs and entry to the area should be prohibited.
5. Security Measures
Large cutting equipment used in the cutting process poses potential safety hazards for this project. Therefore, ensuring the safety of this part of the construction is a key focus of the overall project's safety management.
Prior to using the cutting equipment, a trial run must be conducted according to the equipment's operating procedures, and the layout of the power distribution lines should be checked for rationality to ensure the equipment operates normally during the cutting process; train operators and provide safety disclosures.
Prior to cutting, strictly围护 the cutting safety zone and install clear safety warning signs; conduct safety inspections on auxiliary cutting equipment (crane equipment, etc.).
During cutting, assign a dedicated person to oversee and supervise the safety of the surrounding area (including below the cutting area) throughout the process.
Reinforced concrete columns can be cut. Construction techniques using hydraulic wall saws, electric circular saws, water drills, or road cutters for cutting concrete elements, walls, pavements, etc. Features include no construction dust and more.
1. Reinforced concrete cutting and demolition technology is a new type of static demolition technique, primarily including circular saw cutting and diamond wire saw cutting. The circular saw cutting method uses diamond particle cutting disks for precise, straight cuts, requiring no post-processing and is not restricted by factors such as construction site, environmental protection, project timeline, and safety considerations.
The wire cutting equipment consists of a high-power hydraulic press, transmission positioning wheels, and steel wire with diamond-toothed blades. The hydraulic motor drives the steel wire to rotate rapidly around the object being cut, utilizing a belt pulley system.
Section 2: Static Cutting of Reinforced Concrete involves combining the static cutting method of reinforced concrete with hoisting equipment to accomplish the demolition task; under the action of high-speed movement of diamond tools, reinforced concrete is ground at designated positions. It splits reinforced concrete into two halves,
Three, concrete static demolition truly achieves damage-free cutting and separation of structures, with fast construction speed, high efficiency, and precision. It operates with low noise, no vibration, and no dust pollution, resulting in straight and smooth cuts that require no post-processing. Compared to the two methods, diamond wire cutting offers faster cutting speed, greater flexibility, and lower construction noise.
