カコー List of Products and Services

Our company has consistently contributed to the demolition and renovation of various buildings, including bridges, buildings, towers, chimneys, and factories, primarily through the use of explosives since our establishment. The biggest advantage is cost reduction due to shortened construction periods, along with improved safety as a result. Our blasting technology has built a solid reputation in the industry through over half a century of experience and relentless research and development. Please feel free to contact us if you have any inquiries. 【Features】 ■ Eliminates the need for high-altitude work, leading to shortened construction periods and cost reductions ■ Significantly reduces the risks associated with high-altitude work, improving safety ■ Reduces CO₂ emissions by minimizing the operation of heavy machinery ■ Capable of handling various types of building structures *For more details, please refer to the PDF document or feel free to contact us.

• Dismantling and moving

The removal of aging bridges (superstructures, piers, abutments) is always accompanied by many challenges, such as the difficulty of mechanical demolition. The blasting technology that our company has refined over more than half a century allows us to use the minimum necessary amount of explosives through meticulous blasting design, enabling a rapid collapse and fall from a structurally stable state, thus facilitating a safe mechanical demolition process on the ground. In addition to blasting, we offer many demolition methods that can adapt to various situations at each site. Bridges that have long contributed to regional development and people's interactions are filled with many memories. Please entrust us with the final moments of these cherished bridges. 【Features】 ■ Elimination of the need for large-scale scaffolding, leading to reduced construction time and cost savings. ■ Significant reduction in high-altitude work that poses risks of falling. ■ Reduction of approaches to bridges at risk of aging or collapse. ■ Reduction of load stress acting on the bridge during demolition work. ■ Greatly improved safety. ■ Capability to accommodate various bridge structures. *For more details, please refer to the PDF materials or feel free to contact us.

• Dismantling and moving

A bridge spanning National Route 417 in Ibi River Town, Ibi District, Gifu Prefecture. With the opening of a bypass due to the development of new tunnels and bridges, the Shinkawajiri Bridge (the old bridge), built in 1961, has completed its 60-year service and was dismantled using blasting methods. - Structure: Steel Langer Bridge - Bridge Length: 136.7 m - Width: 5.5 m - Weight: 223 tons On both sides of the bridge, steel components were cut using V-shaped blasting lines and dropped directly onto a work platform created on the riverbed of the Ibi River, facilitating safe mechanical dismantling on the ground. [Features] - Elimination of the need for large-scale scaffolding, leading to reduced construction time and cost savings. - Significant reduction in high-altitude work that poses risks of falling. - Major reduction in hazardous work associated with lifting heavy objects. - No special equipment required due to gravity-based dropping. - The shape after dropping is relatively stable, allowing for smooth subsequent mechanical dismantling. *For more details, please refer to the PDF document or feel free to contact us.*

• Gunpowder
• Dismantling and moving

A bridge spanning National Route 417 in Ibigawa Town, Ibi District, Gifu Prefecture. Following the collapse of the steel girder bridge in the superstructure, blasting methods were also adopted for the dismantling of the bridge piers in the substructure. - Structure: Reinforced concrete (thickness 40 cm, hollow section) - External dimensions: 9 m × 4 m × height 21.6 m By blasting and crushing the base of the bridge pier into a wedge shape, the pier is made to topple onto the work floor, facilitating a safe mechanical dismantling process on the ground. [Features] - No need for large heavy machinery with long booms - The shape after toppling is relatively stable, allowing for smooth subsequent mechanical dismantling - Improved safety, reduced construction time, and cost savings are expected - Cracks in the concrete occur due to the impact during toppling, aiding in the subsequent mechanical dismantling *For more details, please refer to the PDF document or feel free to contact us.

• Dismantling and moving

The "V-shaped shaped charge (Linear Shaped Charge)" is an explosive device for metal cutting that utilizes the Neumann effect (also known as the Monroe effect). It consists of a high-performance explosive filled within a metal sheath made of materials such as copper or lead, shaped into an inverted V cross-section. When detonated, the inverted V section (liner) of the metal sheath transforms into a high-temperature, high-pressure, high-velocity jet due to the Neumann effect, instantly cutting through the target. In the dismantling of steel structures, it can effectively cut major columns and beams (steel materials), allowing for safe and efficient demolition work by causing them to topple or fall. 【Features】 ■ Simultaneous and instantaneous cutting at multiple locations ■ High cutting surface precision ■ Safe cutting operations through remote control ■ Expected labor savings, reduced construction time, and cost reduction ■ Reduction of CO₂ emissions by minimizing heavy machinery operation *For more details, please refer to the PDF document or feel free to contact us.

• Dismantling and moving

The "Super Bigger Method" is a technique for breaking and crushing hard rock and concrete structures with low vibration and low noise. It is particularly effective for construction near safety-related properties, as there is less risk of flying debris. The crushing pressure can reach 3,400 tons, making it possible to reliably crush hard rock. Additionally, it can be operated with a 0.8m³ class power shovel, allowing for rotation during movement and setup, making it highly versatile even in narrow spaces. If a separate hydraulic power source is provided, it can also be suspended and operated with a crane. 【Features】 ■ Can crush with low vibration and low noise ■ Suitable for crushing from medium hard rock to hard rock ■ Mounted on a general-purpose shovel (0.7m³), adaptable from narrow to wide spaces ■ Continuous operation possible with a small bench cut method *For more details, please refer to the PDF materials or feel free to contact us.

• Dismantling and moving

The "Mini Blasting Method" refers to a blasting technique that uses small-diameter, low-quantity high-performance explosives to achieve limited and small-scale destruction. Our company quickly recognized the effectiveness of this method, which had been used in Scandinavia, and has repeatedly conducted experiments aimed at practical application. As a result, we have realized fast, cost-effective, and safer blasting using small yet powerful explosives. This enables efficient and economical destruction in various scenarios at demolition sites. 【Features】 ■ Uses a special protective sheet to effectively prevent flying debris ■ Reduces blasting noise and vibration by using low-quantity explosives ■ Effective for cases where "only this part needs to be destroyed" due to the ability for limited blasting ■ Does not cause damage to areas outside the planned destruction zone ■ Small-diameter blast holes allow for quick drilling operations *For more details, please refer to the PDF materials or feel free to contact us.

• Dismantling and moving