Accelerometer serial-connection distributed type displacement tester for measuring lateral permanent displacement of earthquake liquefied soil mass
An accelerometer and series technology, which is applied in the field of accelerometer series distributed displacement tester, can solve the problem of lateral permanent displacement test instrument without earthquake liquefaction, and achieve accurate and intuitive test, ingenious design and simple structure. Effect
Active Publication Date: 2014-12-24
唐亮 +1
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Problems solved by technology
However, it is still difficult to directly measure the lateral permanent displacement of seismically liquefied soil, and there is no testing instrument suitable for measuring the lateral permanent displacement of seismically liquefied soil.
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[0017] Embodiments are provided below in conjunction with the accompanying drawings to further illustrate the present invention, but the embodiments provided can not be interpreted as limiting the protection scope of the present invention, so those skilled in the art make based on the content and design ideas of the present invention above Non-essential improvements and adjustments should also belong to the protection scope of the present invention.
[0018] The present invention also provides specific steps for implementing the permanent displacement time history of soil liquefaction lateral deformation measured by a displacement tester, as follows:
[0019] (1) Lay the displacement gauge in the model foundation soil in the test to ensure that the displacement gauge is firmly connected to the base strand.
[0020] (2) Then, during the test, the acceleration time histories at various depths of the soil were recorded by accelerometers distributed in series.
[0021] (3) Perfor...
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The invention belongs to the technical field of geotechnical engineering and mechanical engineering, and provides an accelerometer serial-connection distributed type displacement tester for measuring the lateral permanent displacement of earthquake liquefied soil mass. The displacement tester is characterized by being composed of a plurality of thin metal sheets which are connected in series and distributed and are equal in length, the metal sheets are connected with one another through smooth hinges, and an accelerometer AD is fixed to the surface of each metal sheet. By means of the displacement tester, the gap that no instrument which can directly measure the lateral permanent displacement of the earthquake liquefied soil mass in a model test exists yet is filled in, basic data are provided for further studying on the lateral deformation mode of the liquefied soil mass under an earthquake and analyzing the characteristics, and the necessary basis is provided for evaluating the seismic resistance of a bridge pile foundation of a liquefied lateral flow-expanding field. The displacement tester is ingenious in design, simple in structure and accurate and visual in testing.
Description
technical field [0001] The invention relates to an accelerometer series distributed displacement tester for directly measuring the lateral permanent displacement of earthquake liquefied soil in the field of geotechnical earthquake engineering. Background technique [0002] Pile foundation is one of the most commonly used forms of deep foundations. Because of its large bearing capacity, good stability, small settlement, and ability to adapt to various geological conditions and load types, it is widely used in industrial and civil buildings, heavy factory buildings, and bridges. It is widely used in modern projects such as high-speed railway, water conservancy, port terminal, offshore wind power generation and offshore oil production platform. Many earthquake damage surveys have shown that the large lateral deformation and flow of soil are the main reasons for the damage of bridge pile foundations, and the large lateral deformation of soil under earthquakes plays a significant...
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IPC IPC(8): E02D1/00
Inventor 唐亮凌贤长
Owner 唐亮