What Is a Trip Hammer?

Hammering a pile is to use various pile hammers (including drop hammers, steam hammers, diesel hammers, hydraulic hammers and vibration hammers) to repeatedly beat the impact force and the weight of the pile body to overcome the side wall friction resistance of the pile body and the soil at the end of the pile. Layer resistance, a construction method that sinks the pile to the design elevation.

Hammered pile is one of the commonly used pile types in pile foundation construction of high-rise buildings. Earlier hammered piles used reinforced concrete prefabricated solid piles. This kind of pile squeezes soil a lot, causing the soil to bulge, which has a great impact on the surrounding environment, so it is only suitable for construction in suburban open spaces. In recent years, in order to reduce the impact of the soil squeezing effect on the surrounding environment, prestressed reinforced concrete pipe piles, steel pipe piles, and H-shaped steel piles have emerged as the times require. At the same time, in terms of environmental protection, The comprehensive technology of monitoring, detection and protection measures has greatly developed, which has effectively reduced the adverse impact of hammered piles on the surrounding environment. Therefore, hammered piles still have a place in the pile foundations of high-rise buildings in recent years.

Hammering a pile is to use various pile hammers (including drop hammers, steam hammers, diesel hammers, hydraulic hammers and vibration hammers) to repeatedly beat the impact force and the weight of the pile body to overcome the side wall friction resistance of the pile body and the soil at the end of the pile. Layer resistance, a construction method that sinks the pile to the design elevation. Among the various pile hammers, the cylindrical diesel hammer is the most widely used one. It uses light diesel fuel as the fuel and uses the impact force of the impact part and the combustion pressure as the driving force to cause the hammer head to bounce and ram the pile top. .

This method has the disadvantages of large vibration, high noise, serious disturbance, and difficulty in sinking piles in sand layers with N> 30. At the same time, it also has simple construction, easy control of construction quality, short construction period, and under the same soil geological conditions. The single pile has the highest bearing capacity and low cost. ^[1]