Separation Calculation Method of Measured Strain by Strain Gauge of Cemented Sand and Gravel Dam

Abstract

The invention discloses a separation calculation method for strain measured by a cement-sand-gravel dam strainometer. Considering that compared with a common concrete, a cement-sand-gravel material is characterized by low elasticity modulus and high strain, the method calculates each strain component factor by a large deformation problem, and on the basis, a stepwise analysis method is used to separate each component of strain from strain measured by the strainometer step by step. The method is used for separation calculation for strain measured by a cement-sand-gravel dam strainometer. Aimed at the mechanical property of the cement-sand-gravel dam material, defects that component factor is based on small deformation hypothesis in concrete dam related calculation method is modified, and a strain separation method suitable for the cement-sand-gravel dam is obtained. The method has relatively high application value in aspects of cement-sand-gravel dam strain monitoring data analysis, dam body true strain dynamic variation rule research in construction and operation periods.

Description

technical field [0001] The invention relates to the analysis and calculation of building structures, in particular to a separate calculation method for the measured strain of a cemented sand and gravel dam strain gauge. Background technique [0002] The cemented sand and gravel dam has low mechanical strength and large internal porosity, and its elastic modulus is several times or even an order of magnitude smaller than that of ordinary concrete. Therefore, compared with the same scale concrete dam, the cemented sand and gravel dam The strain of the dam body increases significantly, and the creep of the cemented sand and gravel material also increases significantly compared with ordinary concrete. [0003] Usually, the separation method of concrete dam strain gauge measured strain is based on the basic assumption of small deformation. It is inappropriate to completely follow the concrete dam related method in the strain separation of cemented sand and gravel dams, and seriou...

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Problems solved by technology

[0003] Usually, the separation method of concrete dam strain gauge measured strain is based on the basic assumption of small deformation. It is inappropriate to completely follow the concrete dam related method in the strain separation of cemented sand and gravel dams, and serious errors will inevitably occur. Obtain analysis results that truly reflect the strain characteristics and laws of cemented sand and gravel dams

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