Experimental device and assembly method for studying failure mechanism of pile-rock interface

Abstract

The invention discloses an experiment device for researching a pile-rock interface failure mechanism. The experiment device comprises an experiment box used for placing an experiment pile, a reactionframe located above the experiment box and a jack located between the reaction frame and the experiment box, wherein the upper surface of the jack is fixed with the reaction frame; the lower surface of the jack is connected with a force transmitting rod capable of acting on the experiment pile through a pressure sensor; the force transmitting rod is also connected with a displacement sensor. The experiment device for researching the pile-rock interface failure mechanism is simple in structure and convenient to combine, disassemble and assemble, is capable of conveniently and accurately measuring downward displacement of the pile top, and is applied to CT-X-ray experiment platforms.

Description

technical field [0001] The invention relates to an experimental device for studying rock-socketed piles, in particular to an experimental device for studying the failure mechanism of the pile-rock interface and an assembly method thereof. Background technique [0002] In recent years, various construction projects in my country have developed rapidly. More and more sea-crossing bridges and super-large-scale construction projects need to use a large number of rock-socketed piles as the foundation of buildings (structures) to bear huge upper loads. . In actual engineering, since the displacement (0.5–1%D) required to fully mobilize the pile side frictional resistance is much smaller than the displacement (10–20%D) when the pile tip resistance reaches its maximum value, in general, the upper The load is mainly borne by the side resistance of the pile, and in many designs, only the contribution of the side resistance of the pile is considered for reliability. Therefore, rock-so...

AI Technical Summary

Problems solved by technology

Because rock-socketed piles have the characteristics of large bearing capacity, high test cost and difficulty in destructive tests, accurate, systematic and complete measured data are limited, which restricts people's comprehensive understanding of their bearing properties. The limitations of the shear characteristics of the rock pile-rock interface and the understanding of the micro-macro failure mechanism lead to unreasonable design of rock-socketed piles, and even some mistakes. Therefore, the design of rock-socketed piles is mostly conservative, causing many unnecessary waste

Images