Testing method for dynamic response of model pile foundation

Abstract

The invention discloses a testing method for the dynamic response of a model pile foundation. The testing method comprises the steps of 1, selecting model soil and model pile material; 2, preparing a model pile through a model pile preparing device; 3, determining the compaction standard of the model soil according to the speed of shear waves; 4, placing the model pile prepared in the step 2 into the center of a model box, placing the model soil into the model box in multiple times and compacting the model soil according to the compaction standard of the model soil obtained in the step 3, wherein the model soil inside the model box comprises a plurality of layers of soil bodies; 5, arranging various testing elements inside the model box; 6, connecting the testing elements to a data acquisition system; and 7, obtaining the data of the dynamic response by the data acquisition system through the various testing elements. According to the testing method, model tests are efficient and can be carried out accurately.

Description

technical field [0001] The invention belongs to the fields of geotechnical engineering and earthquake engineering, and relates to a method for testing the dynamic response of model pile foundations. Background technique [0002] my country is a country with frequent earthquakes. Pile foundations are widely used in various fields of civil engineering because of their high bearing capacity and excellent seismic performance. However, according to previous earthquake damage data, pile foundations are prone to obvious cracks and other damage after earthquakes. Especially after the strong earthquake, the pile foundation even appears broken piles, which poses a serious safety threat to the superstructure of the pile foundation. At present, scholars at home and abroad have carried out a lot of research on the dynamic response of pile foundations under earthquakes, among which there are many shaking table model tests of pile foundations. Since the shaking table model tests of pile fou...

AI Technical Summary

Problems solved by technology

[0003] There are many unclear and non-standard problems in the model test design and pile foundation dynamic response test, which lead to the phenomenon that the test is easy to be confused and easy to fail

For example, the production process of model soil and model piles is not standardized, and the strength is not accurate; it is difficult to determine the compaction standard for controlling the strength of the model soil when the soil is boxed, and the strength of the soil is too high or too low, which will inevitably lead to distortion of the test results; strain gauges and compensation The difference in the layout environment of the sheet leads to large errors in the test results; when measuring the displacement of the pile foundation, the friction between the cable of the cable displacement meter and the soil causes a large error in the displacement measurement results; there are many test components and test contents for the dynamic response, and the wiring of the test components Error-prone, resulting in line crossing or even short circuit burning test components during the test

Such non-standard and non-standard test problems will inevitably lead to large test errors and even test failures

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