Down-the-hole hammer method under low ceilings, under bridges for railways and roads, and under power lines!
We would like to introduce our "Low-Headroom Down-the-Hole Hammer Method LH-DH Method." Using a driving device to rotate the down-the-hole hammer and bit, the piston inside the hammer cylinder is moved back and forth by air supplied from a high-pressure compressor. This movement causes the bit tip to strike and break stones and rock formations, while the excavated soil is removed using a screw and air lift method. To prevent wear and seizure inside the cylinder due to piston movement, it is necessary to spray oil into the air using a line oiler. 【Construction Examples (Partial)】 ■ LH-DH Method ・Height restriction: 4.55m (under special high-voltage lines) ・Steel material: H250 L=7.5 to 9.5m joint pile construction ・Construction machinery: RX2300 low-headroom construction machine, special auger for low headroom AGD7000 *For more details, please download the PDF or feel free to contact us.
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【Other Construction Examples】 ■ LH-DH Method ・Height Restriction: 4.8m (under railway bridge) ・Steel Material: H400 L=11.5m joint pile construction ・Construction Machinery: RX2300 low head type construction machine with special auger for low head *For more details, please download the PDF or feel free to contact us.
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For more details, please download the PDF or feel free to contact us.
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Our company conducts construction using various methods, such as down-the-hole hammering and CHV methods. In recent years, we have actively introduced special methods and specialized pile drivers, successfully overcoming numerous challenging projects and building a solid track record. We are committed to technological innovation, prioritizing safety, and adhering to regulations, so that we can provide you with peace of mind in our services. Please feel free to contact us with any requests.