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Method for determining filling index of coarse granular material and realizing on-site quality control

A technology of coarse-grained material and granular quality, applied in the direction of self-adaptive control, general control system, control/regulation system, etc., can solve the problems of incomplete theory and restricting the development of modern high dams, and achieve the effect of ensuring the safety of construction and operation

Active Publication Date: 2018-03-16
NANJING YIHAI WATER CONSERVANCY ENG TECH CO LTD
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Problems solved by technology

It can be seen that the current filling standards for rockfill bodies are still incomplete in theory, and there are also obvious problems in the practice of high earth-rockfill dams, which have restricted the development of modern high dams

Method used

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  • Method for determining filling index of coarse granular material and realizing on-site quality control
  • Method for determining filling index of coarse granular material and realizing on-site quality control
  • Method for determining filling index of coarse granular material and realizing on-site quality control

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[0067] In this implementation case, the relative density test and compression test are carried out in combination with the gradation of the stockyard and the scale gradation of the coarse-grained material for dam construction in a certain project. According to the method suggested by this patent, the dual-control index of the porosity and relative density of the coarse-grained material is determined. . The project dam is located in a strong earthquake area, and the design index of relative density of filling coarse aggregate is 0.9. figure 1 There are 98 groups in total, and the maximum particle size is 175mm-400mm.

[0068] Step 1. Statistically analyze the particle mass distribution of 98 groups of coarse-grained material gradations in the stockyard, and put forward the distribution formula shown in formula (2) for inspection. The average correlation coefficient is greater than 0.98, which can better reflect the coarse-grained material gradation. Particle distribution prope...

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Abstract

The invention discloses a method for determining the filling index of a coarse granular material and realizing on-site quality control. According to the method, corresponding gradation statistical models are established according to the components with different particle sizes of the coarse granular material; correlations between the gradations of different model parameters and dry density or porosity are established through relative density tests; by means of compression tests and triaxial tests, correlations between the gradations of the different model parameters and breaking strength are established, and correlations between the gradations of the different model parameters and modulus of compression are established; and with selecting a -modulus of compression as an objective, a filling porosity index or index range is obtained. According to the method of the invention, the filling quality of the coarse granular material is controlled according to the dual-control standard of porosity and relative density; the influences of the gradations, parent rock features and compaction degree of the coarse granular material on the deformation performance of the coarse granular material are comprehensively considered; a reliable basis is provided for the control of the overall stability and effective deformation of rock-fill dams or gravel rock-fill dams, so that the safety of the construction and operation of the dams can be ensured.

Description

technical field [0001] The invention relates to a filling quality evaluation standard widely used in water conservancy and hydropower, civil engineering and traffic engineering coarse-grained materials and implementation issues, and belongs to the technical field of water conservancy and civil engineering. Background technique [0002] The construction and operation safety of a high earth-rockfill dam requires strict deformation control of the dam body and coordinated deformation design of each filling area, which requires an accurate grasp of the engineering characteristics of the rockfill body. For coarse-grained materials or gravel materials, their engineering characteristics mainly depend on three aspects: first, the characteristics of the dam material itself, that is, the characteristics of the parent rock and the gradation characteristics, which are the basis for determining the quality of the particle filling relationship and the degree of particle breakage; It can be...

Claims

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Application Information

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IPC IPC(8): G05B13/04G01N33/38
CPCG01N33/38G05B13/04
Inventor 朱晟
Owner NANJING YIHAI WATER CONSERVANCY ENG TECH CO LTD
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