Device for simulating grouped pile dynamic effect and pile-soil joint effect and simulation method of device

Abstract

The invention discloses a device for simulating the grouped pile dynamic effect and the pile-soil joint effect. The device f or simulating the grouped pile dynamic effect and the pile-soil joint effect comprises a vibration platform, an upper structure equivalent model mounted on the vibration platform through rigid restraint, a pile foundation model fixed to the upper structure equivalent model through elastic restraint, and a container used for simulating a soil model and containing media, the pile foundation model is inserted into a soil model, the vibration platform is used for driving theupper structure equivalent model to carry out one or multiple types of vibration, the influence of multiple dynamic responses of an upper structure in the civil engineering field on the lower structure(the single pile foundation, and the grouped pile foundation) an the like can be simulated, and the device can be used for researching the dynamic responses of the grouped pile foundation and the pile-soil joint effect when the upper structure is in the dynamic effect.

Description

technical field [0001] The invention relates to the technical field of vibration simulation, in particular to a device for simulating the dynamic effect of pile groups and the joint action of piles and soil. Background technique [0002] The basic safety is the first layer of barrier for building safety, and its safety is the premise of the overall safety of the structure, so it is of great significance to study the basic safety. The foundation of high-rise structures such as high-rise buildings and transmission line towers usually adopts the form of group pile foundation, and its cost occupies a relatively large proportion in the whole. An important research topic of pile group foundation is the dynamic response of pile group and the interaction between pile and soil. The upper structure of a tall building produces a dynamic response under dynamic action, and the dynamic response is transmitted to the lower foundation, which brings about the dynamic response of the pile fo...

AI Technical Summary

Problems solved by technology

[0005] 1) The transfer relationship between the dynamic response of the upper structure and the lower foundation cannot be considered: the existing method is to directly apply a displacement on the top of the pile foundation through mechanical measures, but the actual situation is that the upper structure is subjected to dynamic loads such as wind and impact, and a dynamic response occurs. The dynamic response is transmitted to the lower pile group foundation through the connection between the superstructure and the foundation: superstructure -> connection between the upper and lower structures -> lower pile group foundation, which means that the current pile group dynamic response research does not consider transitive relationship

[0006] 2) It is impossible to simulate various forms of movement that may occur in the superstructure: the existing method is to directly impose a relative movement between the pile and the soil through mechanical measures, which is a simple repetition of a single process, without considering the different possible movements of the superstructure form and its full course

[0007] 3) Precise control of the displacement cannot be achieved: the existing method can continuously repeat a single relative movement-reset-relative movement process, but this process cannot be precisely controlled, that is, the relative displacement input in the pile-soil interaction It cannot be quantified well, which is not conducive to the quantitative evaluation of physical quantities such as foundation deformation, friction between piles and soil, and extrusion force

Images