Pile top dynamic load simulation device and method

Abstract

The invention relates to pile body dynamic load simulation, in particular to a pile top dynamic load simulation device and method. The device comprises a case shell, a disc type loading mechanism, a gear set force transmission mechanism and an outer supporting mechanism, wherein the disc type loading mechanism and the gear set force transmission mechanism are arranged in the case shell, and the case shell is placed at the top of a pile body. The disc type loading mechanism can achieve load stage changing through an internal mass block of the disc type loading mechanism, magnetic poles can be changed through an electromagnet, attraction force and repulsive force are generated between the disc type loading mechanism and a permanent magnet, pile pulling force is eliminated in a radius changing mode in the upper semicircle loading process, and meanwhile downward loading force is provided in the radius changing mode in the lower semicircle loading process. Therefore, the device realizes that no pulling force is generated and only vertically downward loading force is generated in the pile top loading process. Through changing the size of the mass block and the frequency of a variable frequency motor, different loading forces and different loading frequencies are simulated, and the situation of the pile body in an actual load is simulated.

Description

technical field [0001] The present invention relates to pile body dynamic load simulation, in particular to a pile top simulation dynamic load device and method. Background technique [0002] With the rapid development of expressway technology, its application has been involved in offshore or coastal areas. The common soil layer of highway foundations is silty soil, and it is difficult to ensure the bearing capacity of foundations only by replacing and filling soil, so pile foundations must be set in these areas. , in order to meet the bearing capacity requirements of normal use. The bearing capacity of the pile directly affects the bearing capacity of the entire foundation. Therefore, it is necessary to monitor and analyze the dynamic characteristics of a single pile under the preset load, and finally predict and analyze the life status of the pile. [0003] When the existing pile top vertical loading device realizes loading, it is easy to generate upward pulling force, w...

AI Technical Summary

Problems solved by technology

[0003] The existing vertical loading device on the top of the pile is easy to generate uplift force when loading, which will cause tensile stress on the pile body, and it is more likely to cause greater damage to the pile under pressure

In addition, the existing vertical loading device on the top of the pile is bulky as a whole, and the economy is poor

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