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Introduction to the down-the-hole hammer construction method
The rotary drilling DTH hammer construction method is a pile foundation construction method that combines a large-diameter down-the-hole hammer with a rotary drilling rig. Its main purpose is to solve the problem of slow drilling of the rotary drilling rig in extremely hard layers.
Sep 22nd,2024
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Introduction to the down-the-hole hammer construction methodThe rotary drilling down-the-hole hammer construction method is a pile foundation construction method that combines a large-diameter down-the-hole hammer with a rotary drilling rig. Its main purpose is to solve the problem of slow drilling of the rotary drilling rig in extremely hard layers.
Rotary digging down-the-hole hammerThe down-the-hole hammer construction method can be briefly summarized as follows:
1. Use the rotary drill as the main machine and hang the down-the-hole hammer drilling tool;2. Use a high-power air compressor as the power source to provide high-pressure air;Rotary digging down-the-hole hammer
3. Use a pneumatic down-the-hole hammer as a drilling tool for impact drilling;4. Use high-pressure air as the circulating medium to provide power, cool the drill bit, clean holes and remove slag.Compared with traditional piling equipment, rotary drilling rigs have significant advantages in construction of various rock and soil layers.
However, when the rock strength exceeds 80Mpa, rotary drills will face problems such as low construction efficiency, rapid wear of drilling tools, easy damage to drill pipes, and shortened host life. Therefore, there is an urgent need for a rotary drilling construction method suitable for hard rock drilling.
