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Soft soil rheological parameter determination method and soft soil rheological parameter determination device based on one-dimensional stress relaxation test

A stress relaxation and rheological parameter technology, applied in the direction of applying stable tension/pressure to test the strength of materials, can solve problems such as complex methods and inconvenient operation, and achieve short time consumption, convenient operation, and improved test efficiency and parameters. definite effect

Inactive Publication Date: 2013-12-25
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

Typical ones are: Zhao Weibing (1989) used the descent method to determine the parameters of the rheological model. Although this method can consider the settlement in the consolidation stage, its initial parameters have a great influence on the final result, and sometimes it is not possible to obtain reasonable parameters. value; Li Xibin (2005) used the rheological consolidation analytical theory to calculate the settlement of the soil layer at different times and the pore water pressure at the bottom of the soil layer, and then carried out parameter fitting according to the nonlinear fitting method. However, the method for determining the parameters is complicated. Disadvantages such as inconvenient operation

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  • Soft soil rheological parameter determination method and soft soil rheological parameter determination device based on one-dimensional stress relaxation test
  • Soft soil rheological parameter determination method and soft soil rheological parameter determination device based on one-dimensional stress relaxation test
  • Soft soil rheological parameter determination method and soft soil rheological parameter determination device based on one-dimensional stress relaxation test

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Embodiment Construction

[0029] The implementation of the present invention is described below through specific examples and in conjunction with the accompanying drawings, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific examples, and various modifications and changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

[0030] figure 1 It is a flow chart of steps of a method for determining rheological parameters of soft soil based on one-dimensional stress relaxation test of the present invention. Such as figure 1 Shown, a kind of soft soil rheological parameter determination method based on one-dimensional stress relaxation test of the present invention comprises the following steps:

[0031] Step 101,...

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Abstract

The invention discloses a soft soil rheological parameter determination method and a soft soil rheological parameter determination device based on a one-dimensional stress relaxation test. The method comprises the following steps: carrying out one-dimensional stress relaxation test on natural soft clay and recording a change rule of a vertical stress sigmav along with time t; drawing an lnsigmav-lnt double logarithmic curve graph according to a relation between the recorded vertical stress sigmav and the time t; obtaining the slope of a curve based on the drawn curve, wherein the slope of the curve is a stress relaxation coefficient Ralpha; and determining other rheological model parameters of soft soil by utilizing a soft soil rheological parameter conversion formula according to the solved stress relaxation coefficient Ralpha. The soft soil rheological parameter determination method has the advantages of convenience in operation, short consumed time, testing cost saving and time cost saving, the improvement of the testing efficiency and accurate determination of the parameters.

Description

technical field [0001] The invention relates to a method and device for determining rheological parameters of soft soil, in particular to a method and device for determining rheological parameters of soft soil based on a one-dimensional stress relaxation test. Background technique [0002] In recent years, more and more civil engineering practice projects are faced with rheological problems of soft soil foundations. The research on the rheological model of soft soil and the determination of its parameters are conducive to understanding the rheological characteristics of soft clay and guiding engineering practice. The determination method of the parameters of the rheological model can be obtained by analyzing, calculating and summarizing the test data according to the physical meaning of the parameters. At present, scholars have done a lot of research on the determination of rheological model parameters of soft soil. Typical ones are: Zhao Weibing (1989) used the descent met...

Claims

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Application Information

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IPC IPC(8): G01N3/08
Inventor 尹振宇吴则祥李艳玲金银富朱启银夏云龙
Owner SHANGHAI JIAO TONG UNIV
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