DEVICE FOR PILE FOUNDATION FOR MACHINES WITH DYNAMIC LOADS AND VIBRATION-SENSITIVE EQUIPMENT Russian patent published in 2020 - IPC E02D27/44 

FIELD: construction.

SUBSTANCE: invention relates to construction and can be used in construction of pile foundations for machines with dynamic loads or vibration-sensitive equipment on any non-rocky soil. Method of pile foundation for machines with dynamic loads and vibration-sensitive equipment includes injection of movable cement-sand mortar into soil base under sole or concrete preparation of grillage wall through introduced therein injector. Non-detachable injector in form of spirally laid perforated pipe is installed in contact zone under sole or concrete preparation of grillage in pre-formed spiral horizontal groove, wherein one end of the injection pipe is plugged, and the second end is connected to the pipe vertical outlet, through which cement-sand solution is supplied under pressure. Vertical pipe outlet is located beyond the grate boundary to their side surface. Prior to injection of cement-sand mortar onto pile foundation, maximum dynamic load is applied from machine mounted on pile foundation, or from vibration exciter near pile foundation, measuring level of oscillations of pile foundation, and injection of cement-sand mortar is performed until controlled level of oscillations of pile foundation does not decrease to safe for operation pile foundation, machine or vibration-sensitive equipment level. After hardening of the injected solution, the non-detachable injector acts as horizontal reinforcement of the fixed contact ground zone under the grillage or its concrete preparation.

EFFECT: technical result consists in enabling significant reduction to safe level of oscillations of pile foundations for machines with dynamic loads and vibration-sensitive equipment due to the most optimal mode of injecting cement-sand mortar for the sole of the grillage or its concrete preparation, providing longer service life of machines and equipment, reducing negative impact on surrounding structures.

1 cl, 5 dwg