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Fuzhou introduced diamond wire saw technology to remove more than 300 meters of ramps in 10 days. There is a magical rope that can be circulated back and forth on the bridge. Cutting the concrete deck is as simple as cutting the tofu, without noise, pollution, and safety. Recently, the reporter learned from the Fuzhou Urban Construction Department that the Beijiang River East Second Ring Road ramp project was launched. At present, the demolition work of the Xifeng Road in Fuzhou, Fengfeng Bridge has been officially carried out, and this magical rope has been used for dismantling. More than 300 meters long ramp, with this advanced technology, can be removed within 10 days. The original D-Bridge Bridge, which is being demolished, is located between the Jiufeng Bridge and the Jiufeng Road. It is the ramp of the Xifeng Peak at the Xifeng Bridge. The bridge is in the north-south direction and intersects with the east-west direction of Beijiangbin Road and Qifeng Road. The length of the main body is 306.8 meters and the width is 8.75 meters. The bridge has a total of 19 holes. The bridge was completed in November 1993 and the superstructure is a prestressed concrete continuous hollow slab. It is understood that the process was first used in Fuzhou, and it was also used for the first time in the demolition of the municipal bridge in Fujian. After the bridge deck is demolished, the original bridge deck, which is more than 8 meters long and more than one meter wide, will be intercepted and placed at the newly built approach bridge to study its durability and strength, and provide experience support for similar bridge construction in the future. The magic: cutting concrete bridge deck is like cutting tofu. Recently, the reporter saw on the ramp that was being dismantled that the workers were working, and a long row of beads fell on the long rope and turned back and forth. Every few meters on the bridge there is a whole row of holes with a diameter of about 20 cm. According to the person in charge of the site, this wire saw is called a diamond wire saw, usually fixed by a spring. Two vertical holes are drilled horizontally or vertically to thread the rope, and then mechanically cut for cutting. Different sizes. The diamond wire saw is mainly used for sawing. It is a kind of saw. In theory, if you have enough mechanical devices and a long enough diamond wire saw, you can cut the earth into two halves, because the top of the wire saw The diamond contained in the bead is the hardest substance in nature, so it can cut any material. Compared with traditional saw blades, diamond wire saws are not limited by the size of the building. They can be cut in any direction, such as cross-cutting, vertical cutting, diagonal cutting, etc., to get rid of construction vibration, noise, dust and other environmental problems. The efficiency is extremely high. Secret One: Cutting bridges with low noise and no disturbances In the past, the demolition of buildings was often mechanically dismantled, which was very noisy. If the demolition work was carried out in residential areas, residents had to endure the torment of dismantling noise. The removal of the diamond wire saw process completely avoided this drawback. At the scene, the reporter saw that the diamond wire saw was working, and the surrounding area of ​​the cutting object did not hear any noise except the damp and muddy. It is understood that there is no noise in this process. The diamond wire saw only grinds the sound of reinforced concrete during the cutting process. The electro-hydraulic motor runs smoothly and there is no harsh sound throughout the construction. The resulting volume can be controlled below 44 decibels. Secret 2: Avoiding dust pollution Protection The water plant reporters at the construction site learned that there is a water plant next to the project. If the traditional bridge removal process is adopted, it will inevitably produce a lot of flying dust. With the diamond wire saw, since water is used as its lubricant, the water degrades the dust at the same time, so there is no dust pollution. According to reports, the use of water cooling and running high-speed diamond tools during the construction process can carry away the ground iron scraps and concrete debris, and the generated cooling water has no harmful substances. The cooling water can be reused after being recovered on site. And use a closed system to control the splash of water. Secret 3: Static cutting without vibration to avoid safety hazards Traditional mechanical demolition of bridge work, construction is in an uncontrollable state, coupled with the disorderly operation of workers, there are potential safety hazards. In the field, there has been a collapse of the demolition of the viaduct. Since the cutting is done during the grinding of the reinforced concrete by the diamond tool, there is no vibration problem. No impact on the original retained structure, no micro cracks will affect the structural stress and service life. Moreover, it does not impact the load, and it does not generate a large impulse to the bridge itself, so the safety can be guaranteed, which is unimaginable in the conventional conventional dismantling.