High-frequency hydraulic vibratory hammer for China Railway R&D project

China Railway Engineering Machinery Research and Design Institute affiliated to China Railway Engineering Corporation has independently developed and successfully developed “high-frequency hydraulic vibratory hammer” and passed expert appraisal. The expert group believes that “high-frequency hydraulic vibratory hammer” is an efficient pile-driving machine that has been applied in many projects to effectively reduce or eliminate post-construction settlement.” High-frequency hydraulic vibratory hammer is currently the most efficient pile-driving machine. High-frequency hydraulic vibratory hammers are suitable for construction under any geological conditions as long as they do not enter the rock.

Under the same bearing capacity, the pile material is the most economical. It can meet the requirements of railway subgrade on bearing capacity and post-construction settlement under any geological conditions, and can also improve the construction speed of railway engineering and reduce the project cost.

China Railway Engineering Machinery Research and Design Institute has successfully developed the first high-frequency hydraulic vibratory hammer product in China for several years. The high-frequency vibrating hammer has a high frequency and is suitable for the soil with a hard sanding property. The vibration sensitivity during operation is extremely small, and it is more in line with environmental protection requirements.

A double "Y"-shaped steel structural member is connected to the bottom of the high-frequency hydraulic vibratory hammer. The member is covered with a circular hole to start the hydraulic vibrating hammer at a higher frequency, and the flexible probe is sunk to the required depth to adjust the vibrating hammer frequency ( Generally, it is 10~20Hz) to make resonance with the surrounding soil. As the density of the soil layer increases, the resonance frequency increases. By adjusting the hydraulic vibratory hammer frequency continuously, different compactness can be obtained. The treatment depth can be 25 meters, and the upper and lower sides are dense. The degree is consistent. High-frequency hydraulic vibratory hammer power (recommended about 500KW) High ergonomics and strong capacity. The diameter of the piles under construction is large (outer diameter >1.5 m), which can meet the engineering requirements. It is the most efficient pile-driving machine.