ОБ ЭНЕРГОЕМКОСТИ ЗАБИВКИ ШТАМПА И СВАЙ РАЗНОЙ ДЛИНЫ ПРИ УСТРОЙСТВЕ ЛЕНТОЧНОГО КОМБИНИРОВАННОГО СВАЙНОГО ФУНДАМЕНТА (ИССЛЕДОВАНИЯ НА МОДЕЛЯХ)

Abstract

The results of laboratory experiments on the assessment of the energy intensity of pile driving and stamping during the installation of a belt combined pile foundation (hereinafter referred to as BCPF) are presented. The research was carried out using models of piles and a tape stamp. It was found that the presence of holes in the tape stamp facilitates the process of stamping a trench in the ground and is accompanied by some discharge of clay soil into the cavity of the holes. It has been revealed that piles of longer length, with the same energy consumption for their driving, sink to a lower depth. It is determined that driving piles through holes of a stamp immersed in the ground is a more energy-intensive process than driving piles outside the stamp. This effect is more significantly manifested when sinking piles of small length. It has been found that hammering a stamp with through holes on top of piles immersed in the ground is accompanied by greater energy consumption than hammering a stamp in the absence of driving piles. Moreover, these costs are higher the longer the length of the piles. Correlations have been obtained, which are recommended to be used for the relative prediction of the energy consumption of the hammer required for hammering the stamp and piles when installing the BCPF. It has been revealed that the most energy-efficient process is the BCPF installing, in which the stamp for stamping the trench is hammered after the piles are immersed.