EXPERIENCE OF USING PNEUMATIC HAMMERS WITH A VARIABLE POWER STRUCTURE IN THE CONSTRUCTION OF PILED FOUNDATIONS
V. V. Chervov
Chinakal Institute of Mining, Siberian branch Russian Academy of Sciences, Novosibirsk, Russia
Keywords: Pneumatic hammer, pipe, weight, blow, blow frequency, compressed air, ground, force
Abstract
The relevance of using pneumatic hammers in the construction of underground structures is justified. The dependence of the energy value of a single blow of a pneumatic hammer on the diameter of a pipe to be driven is proposed. The resistance forces from the side that occur during hammering the steel pipe are determined. As the main technical parameter of a pneumatic hammer, the weight of its striking part is proposed. The features of the device and technical characteristics of pneumatic hammers with a variable power structure are given. The practical experience of vertical pipe driving in the construction of piled foundations is described. Technological operations for the construction of retaining walls in the ground based on the use of steel sheet piles, pipes, channels, I-beams, etc. are considered. Methods of placement and arrangement of technological equipment for fixing a pneumatic hammer on a steel pipe driven into the ground are given.
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