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 and 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 through injectors. Non-detachable injectors in the form of U-shaped perforated pipes are installed along the length in the contact zone under the sole or concrete preparation of the grill in pre-formed U-shaped horizontal grooves parallel to each other at equal distance, wherein each of U-shaped injection pipes has one ends plugged, and second ends are connected to pipe vertical outlets, through which cement-sand mortar is simultaneously supplied under pressure. Neighbouring U-shaped injection tubes are laid opposite so that their vertical outlets are located on opposite sides of grillage plate outside of it but close to its lateral sides. Prior to injection of cement-sand mortar on pile foundation, maximum dynamic load from machine mounted on pile foundation, or from vibration exciter near pile foundation is measured, level of oscillations of pile foundation is measured. Injection of cement-sand mortar is performed until controlled level of oscillations of pile foundation does not decrease to safe for operation pile foundation for machines with dynamic loads or vibration-sensitive equipment level. After hardening of the injected solution, the fixed injectors act as horizontal reinforcement of the fixed contact ground zone under the grillage or its concrete preparation.

EFFECT: technical result consists in reduction to safe level of oscillations of pile foundation for machines and vibration-sensitive equipment in a simple way without complex tests and calculations, using available equipment, longer service life of machines and equipment, reduced negative impact on surrounding structures.

1 cl, 5 dwg