Method for simulating stressed process and load-transferring mechanism of equivalently and horizontally loaded pile

Abstract

The invention discloses a method for simulating a stressed process and a load-transferring mechanism of an equivalently and horizontally loaded pile. By the method, physical simulation and visual teaching of the stressed process of the horizontally loaded pile (an axial force on the pile top can be selectively added) are achieved; the method is of a certain guiding significance on research on thehorizontally loaded pile; a pressure applying assembly and a pressure transmitting assembly are correspondingly connected together to apply an initial soil pressure initial earth pressure to a model pile arranged in a counterforce frame in a direction parallel to the application direction of a pile-top horizontal force, a lateral friction system applies pile-side frictional forces to both sides ofthe model pile in a direction parallel to the horizontal force loading direction, a pile body testing system is used for testing changes of pressure and displacement of each section of the pile bodyof the model pile; a horizontal cyclic force is applied to the pile top of the model pile or a vertical force is applied to the pile top in advance in a grading manner through a pile-top horizontal loading system and a pile-top vertical loading system, and horizontal deformation and vertical deformation of the pile top during grading application of the horizontal cyclic force are tested, so that simulation of the stressed process of the horizontally loaded pile is achieved.

Description

technical field [0001] The invention relates to a method for simulating the stress process and load transfer mechanism of an equivalent horizontally loaded pile, which belongs to the technical field of indoor physical simulation of civil engineering. Background technique [0002] In the process of continuous development of modern cities, the construction of high-rise buildings has become the need of urban development, and the pile foundation has become the first choice for the foundation of high-rise buildings. Since the upper structure needs to bear the action of wind load or seismic load, the load acting on the pile top is vertical. The combination of force and horizontal force, in addition, for projects such as cross-sea bridge pile foundations, wharf pile foundations, offshore engineering, offshore oil platforms, etc., they mainly bear horizontal loads such as wave force, tidal force and wind pressure, and may also bear the impact of ship collision. horizontal impact. A...

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Problems solved by technology

There is still no definite conclusion on how much the second-order effect caused by the axial force is. Including the vertical axial force on the top of the pile will also make the calculation complicated.

In addition, in the calculation of horizontally loaded piles, the influence of the soil on the side of the pile parallel to the direction of the horizontal force of the pile is generally not considered, and the influence of the resistance of the soil on the side of the pile parallel to the direction of the horizontal force of the pile is mainly considered. These simplifications can be achieved to some extent Simplify complex issues, but how much these simplifications affect the safety of foundation piles still needs further consideration

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