METHOD FOR TESTING THE GROUND BASE WITH A BORED HANGING PILE Russian patent published in 2022 - IPC E02D1/02 

FIELD: construction industry.

SUBSTANCE: invention relates to construction, namely to methods for testing piles with static load. The method for testing the soil foundation with a bored hanging pile includes the application of a pressing force on a model pile, continuously increasing at a constant speed, determined depending on the diameter of the pile and the physical properties of the soil, synchronous registration of the pressing force with an error of 100-200 N and the pile precipitation with a step of 0.005 mm of the pile precipitation, splitting the graph of the dependence of the sedimentation rate of the model pile on the pressing force into three sections according to the average speed of the pile sedimentation in each of them and calculating the bearing capacity of the working pile by the value of the pressing force at the end of the 2^nd section of the graph and by the similarity coefficients of the model pile. Previously, prior to the application of the pressing force, a transverse dynamic pulse of 22-25 Ns is applied to the lateral surface of the model pile perpendicular to its longitudinal axis at a level of 15-20 cm from the end of the pile head, sequentially at three equidistant points, and the maximum amplitude of the free transverse oscillation of the pile head in the ground along the axes of application of the dynamic pulse is recorded. Then the same transverse dynamic pulse is applied to the working pile and the maximum amplitude of the free transverse vibration of the pile head in the ground is recorded at the same level and in the same directions as for the model pile. The ratio of the maximum amplitudes of the free transverse oscillation of the head of the model pile to the values of the maximum amplitudes of the free transverse oscillation of the head of the working pile is used to adjust the values of the elastic resistance of the soil on the side surface of the working pile calculated by similarity conditions.

EFFECT: increasing the reliability and accuracy of determining the elastic resistance of the soil on the side surface of the working bored hanging pile in the foundation of the structure according to the conditions of its similarity to the model pile.

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