Pile-soil interaction indoor test device under action of combined cyclic load and installation method

Abstract

The invention discloses a pile-soil interaction indoor test device under the action of a combined cyclic load. The device comprises a counter-force system and a model box; the model box is filled witha soil body and a soil body physical and mechanical parameter acquisition element; a loading system is arranged on the counter-force system; the loading system is located above the model box and corresponds to the model box; the end face, facing the loading system, of the model box is an open end; one end of a model pile is installed on the loading system; the model pile is inserted into the soilbody and is placed in the model box; a plurality of physical and mechanical state acquisition elements are arranged in a pile body of the model pile; a horizontal displacement meter is arranged at the top of the model pile; the loading system comprises a soil body overlying pressure loading system, a horizontal loading system and a pile vertical load loading system; the horizontal loading systemhas horizontal cyclic force loading and continuous force loading functions; and the pile vertical load loading system has a function of applying vertical load to the model pile. The test device can show the response and interaction rules of the pile and the soil body under the combined action of horizontal cyclic and vertical load, and can carry out pile-soil interaction tests of soil properties (including sandy soil and clay) in different initial stress states and different pile foundation forms under different combined loads; and therefore, the bearing performance of the pile, the response rule of the soil body and the like can be detected, and the deformation characteristics of the pile and the soil body in the test process can be visually recorded.

Description

technical field [0001] The invention relates to an indoor test device for pile-soil interaction under combined cyclic load, and also relates to an installation method for the indoor test device for pile-soil interaction under combined cyclic load. Background technique [0002] As one of the important foundation forms supporting the superstructure, piles may encounter horizontal loads in addition to the upper vertical load transmitted by the superstructure during service and operation, such as offshore wind power pile foundations, which bear the horizontal load of waves and the upper part of the wind turbine. The pile foundation bears vertical and horizontal loads collectively called combined loads, and these combined loads often act cyclically on the pile foundation during long-term service and operation. At present, in the process of carrying out the test of the response of pile foundations under combined loads, generally, the response of piles and soils under monotonous co...

AI Technical Summary

Problems solved by technology

At present, in the process of carrying out the test of the response of pile foundations under combined loads, generally, the response of piles and soils under monotonous combined loads is analyzed, and there is a lack of indoor test devices and methods for studying the interaction between piles and soils under combined cyclic loads

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