A Pile Foundation Model Loading Device Under Cyclic Loading

Abstract

The invention discloses a pile foundation model loading device under cyclic load, which comprises a main frame, a reaction frame on the top of the main frame, a horizontal steel frame with fixed pulleys on the top of the reaction frame, and a horizontal beam on the side of the reaction frame , The vertical cyclic loading system on the left side of the main structure, the horizontal cyclic loading system on the right side, the first counterweight and the second counterweight, dynamometer, displacement sensor; the dynamometer is used to measure the vertical cyclic load value and horizontal cyclic load value, the displacement sensor can detect the horizontal displacement and vertical displacement of the pile foundation, a controllable drainage partition is also set on the left side of the model tank to facilitate the discharge of pore water, and a pulley is set at the bottom of the main tank to facilitate the model box The overall movement; the device of the invention solves the limitation of single static loading, can more effectively simulate the loaded state of the pile foundation under real conditions, and the device is simple and easy to operate.

Description

technical field [0001] The invention belongs to the field of bridge pile foundation engineering, in particular to a pile foundation model loading device under cyclic load. Background technique [0002] At this stage, bridge construction continues to extend from the inland to the offshore, changing the pattern of difficult communication between the two sides of the river and promoting the economic development on both sides of the river. In the construction of the cross-sea bridge, it is necessary to consider the vertical cyclic load of the passing vehicles on the bridge deck and the cumulative settlement and deformation of the pile foundation under the periodic horizontal cyclic loads such as wind, waves, and earthquakes, which will cause the strength of the soil to decrease and cause adverse effects on the structure. Therefore, the complex load state of pile foundation has become the key research target at this stage. [0003] At present, the research on bridge pile foundat...

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Problems solved by technology

However, at this stage, there are many model experiments on pile foundations under static loads and horizontal cyclic loads, but research on the mechanical characteristics of pile foundations under vertical cyclic loads and horizontal cyclic loads is still lacking.

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