Pile foundation model loading device under cyclic load

Abstract

The invention discloses a pile foundation model loading device under a cyclic load. The pile foundation model loading device comprises a main frame, a counter-force frame at the top of the main frame,a horizontal steel frame with fixed pulleys at the top of the counter-force frame, a horizontal cross beam at the side portion of the counter-force frame, a vertical cyclic loading system on the leftside of the main structure, a horizontal cyclic loading system on the right side of the main structure, a first counterweight, a second counterweight, a dynamometer and a displacement sensor; and thedynamometer is used for measuring the vertical cyclic load value and the horizontal cyclic load value, the displacement sensor can detect the horizontal displacement and the vertical displacement ofa pile foundation, the left side of a model groove is also provided with a controllable drainage partition plate, so that pore water is conveniently discharged, and a pulley is arranged at the bottomof a main groove body to facilitate the overall movement of a model box. The device overcomes the limitation of single static loading, can more effectively simulate the load-bearing state of the pilefoundation under real conditions, and 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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