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 the form of a serpentine perforated pipe is installed by its branches along the length in the contact zone under the sole or concrete preparation of the grillage in a pre-formed snake-like 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 mortar is supplied under pressure, wherein vertical pipe outlet is located beyond grill but not to its lateral side. Prior to injection of cement-sand mortar on pile foundation, maximum dynamic load is applied from machine mounted on pile foundation, or from vibration exciter near pile foundation, level of oscillations of pile foundation is measured, 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 mortar, 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 reduction to safe level of oscillations of pile foundation for machines and vibration-sensitive equipment in the simplest way without complex tests and calculations, using available equipment, longer service life of machines and equipment, reducing negative impact on surrounding building structures.

1 cl, 5 dwg