A method for rapidly determining a soil-water characteristic curve and dynamic rebound modulus model parameters

A soil-water characteristic curve and dynamic elastic modulus technology, applied in special data processing applications, electrical digital data processing, instruments, etc., can solve the problems of long time and high cost of model parameters, reducing the amount of testing and solving time. The effect of long and low test cost

Active Publication Date: 2019-05-28
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for quickly determining the parameters of the soil-water characteristic curve and the dynamic modulus of resilience model, wh

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  • A method for rapidly determining a soil-water characteristic curve and dynamic rebound modulus model parameters
  • A method for rapidly determining a soil-water characteristic curve and dynamic rebound modulus model parameters
  • A method for rapidly determining a soil-water characteristic curve and dynamic rebound modulus model parameters

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Embodiment Construction

[0036]The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0037] A method to quickly determine the parameters of the soil-water characteristic curve and the dynamic modulus of resilience model, such as figure 1 As shown, follow the steps below:

[0038] Step a, carry out the basic physical performance index test of various roadbed soils, the physical performance indexes of roadbed soil include: liquid limit w L , plastic limit w P , plasticity index I P , optimal water content w opt , the maximum dry density ρ dmax , 0.075mm sie...

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Abstract

The invention discloses a method for rapidly determining soil-water characteristic curves and dynamic rebound modulus model parameters. The method is characterized in that firstly, a basic physical performance index test of subgrade soil is carried out; secondly, a pressure plate instrument is used for measuring matrix suction, a soil-water characteristic curve is established, and then a roadbed soil rebound modulus test is conducted through three movable axes, the rebound modulus values are obtained, the roadbed soil rebound modulus estimation model parameters are obtained through fitting andsolving, and finally a relation equation between the model parameters and roadbed soil physical property indexes is established. According to the method, the test quantity is greatly reduced, the test cost is reduced, and the problems of long model parameter determination time, high cost consumption and the like of an existing rebound modulus and soil-water characteristic curve pre-estimation model are solved.

Description

technical field [0001] The invention belongs to the technical field of road engineering, in particular to a method for quickly determining soil-water characteristic curves and dynamic elastic modulus model parameters. Background technique [0002] The dynamic resilience modulus reflects the stress-strain nonlinear characteristics of the subgrade soil under the action of traffic load, and is the main mechanical index of the subgrade compacted soil's ability to resist deformation under the action of traffic load. The dynamic resilience modulus of subgrade soil directly affects the pavement structure The prediction of layer fatigue cracking and the determination of the design thickness have become the key parameters adopted by the current pavement design methods at home and abroad. [0003] At present, there are generally three methods for determining the dynamic modulus of resilience of subgrade soil: field test back calculation, indoor repeated loading dynamic triaxial test, ...

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Application Information

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IPC IPC(8): G06F17/50
Inventor 张军辉彭俊辉
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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