On-site original grading rockfill material mechanical parameter speculation method

A technology of mechanical parameters and rockfill materials, applied in the field of on-site mechanical parameter estimation of original graded rockfill materials, can solve problems such as difficulty in obtaining mechanical parameters of original graded rockfill materials, achieve practicality, theoretical and technical feasibility, and improve prediction accuracy Effect

Pending Publication Date: 2021-08-03
CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD
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  • Description
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  • Application Information

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Problems solved by technology

[0004] In order to solve the above technical problems, the present invention provides a method for estimating the mechanical parameters of original graded rockfill materials on site. It solves the problem of difficulty in obtaining the mechanical parameters of the original graded rockfill materials under the existing technical conditions, and can be popularized and applied in most projects to improve the prediction accuracy of rockfill dam deformation, and also provide a feasible method for the research on the scaling effect of dam rockfill materials. It is convenient to carry out scientific research from multiple angles and promote the development of rockfill dam construction technology

Method used

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  • On-site original grading rockfill material mechanical parameter speculation method
  • On-site original grading rockfill material mechanical parameter speculation method
  • On-site original grading rockfill material mechanical parameter speculation method

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Embodiment 1

[0024] A method for estimating mechanical parameters of original graded rockfill materials on site is provided, including the following steps:

[0025] Obtain the scale factor: Based on the inversion analysis of the prototype observation data of the built or under construction project, through the analogy method of engineering experience, the scaling factor of the scaling effect that affects the mechanical parameters is obtained;

[0026] Estimated impact: Based on the Duncan-Zhang E-B model, approximate the impact of scaling effects on calculation parameters;

[0027] Scale calculation: According to the estimated scale factor of the scale effect and the test parameters, the parameter back calculation is carried out to obtain the mechanical parameters of the original graded rockfill material.

Embodiment 2

[0029] Based on embodiment 1, and in the step of estimating the impact, the calculation parameters are selected K, n, K b , m is representative, among them, K is the tangent elastic modulus number, n is the tangent elastic modulus index, K b is the tangent bulk modulus number, m is the tangent bulk modulus index.

Embodiment 3

[0031] Based on Example 1, and the scaling factor of the scale effect is the relationship between the primary ingredient parameters at the target project site and the indoor triaxial test parameters.

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Abstract

The invention provides an on-site original grading rockfill material mechanical parameter speculation method which comprises the following steps: obtaining scale factors: obtaining scale effect scale factors which influence mechanical parameters through an engineering experience analogy method based on inversion analysis of prototype observation data of a constructed or under-construction project; estimating influence: approximately estimating the influence of a scale effect on calculation parameters on the basis of a Duncan-Zhang E-B model; performing equal-proportion calculation: performing parameter adjustment back calculation according to the estimated scale effect scale factor and the test parameters to obtain the mechanical parameters of the original grading rockfill material. The invention provides an effective method for acquiring the mechanical parameters of the original grading rockfill material for small and medium-sized projects without special scale effect research, and also provides a new thought and a new method for scale effect research of large and even giant projects; the method is simple, feasible in theoretical technology, easy to understand and operate, convenient to popularize and apply in engineering and high in practicability.

Description

technical field [0001] The invention relates to a method for estimating mechanical parameters of original graded rockfill materials on site. Background technique [0002] Rockfill dams are also called local material dams, and the maximum particle size of rockfill materials for the dam shell is generally 60-80cm. With the popularization and application of modern heavy-duty impact rollers in engineering, for example, the maximum particle size of the rough pile stones for the upper dams of Hongjiadu, Shuibuya, Dongqing and other hydropower stations has reached 120cm. Indoor triaxial test of rockfill material is the core of high dam engineering material design, dam deformation prediction and control. However, the diameter of the large-scale indoor triaxial test is only 300mm, the height is 600-750mm, and the maximum particle size allowed for the test is only 60mm. The large difference in model parameters and mechanical properties is called "scaling effect". [0003] In recent...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06F111/10G06F119/14
CPCG06F30/20G06F2111/10G06F2119/14
Inventor 湛正刚韩朝军程瑞林苗君慕洪友蔡大咏
Owner CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD
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