Concrete structure anti-permeability quantitative design method with consideration of load effect

Abstract

The invention relates to a concrete structure anti-permeability quantitative design method with consideration of a load effect, wherein the method includes the following steps: 1), acquiring an ultrasonic wave velocity-stress ratio relationship under a concrete load holding state; 2) acquiring an ultrasonic wave velocity-stress ratio relationship under a concrete unloading state; 3) acquiring an anti-permeability water pressure-stress ratio relationship under the concrete unloading state; 4) acquiring an anti-permeability water pressure-ultrasonic wave velocity relationship according to the ultrasonic wave velocity-stress ratio relationship and the anti-permeability water pressure-stress ratio relationship; 5) acquiring an anti-permeability water pressure-stress ratio relationship according to the ultrasonic wave velocity-stress ratio relationship and the anti-permeability water pressure-ultrasonic wave velocity relationship; 6) acquiring multiple groups of data of the anti-permeability water pressure-stress ratio relationship under the concrete load holding state, removing dimensionalization, and then fitting to obtain a concrete structure anti-permeability design calculation formula with consideration of the load action; and 7) carrying out concrete structure anti-permeability design. Compared with the prior art, the method has the advantages of comprehensive design, high practicality, quantitative design and the like.

Description

technical field [0001] The invention relates to the field of civil engineering, in particular to a quantitative anti-seepage design method of concrete structures considering the load effect. Background technique [0002] At present, there are different methods for the anti-seepage design of concrete structures in my country, but none of them consider the impact of the load on the actual structure on the anti-seepage performance of concrete. Taking the "Technical Specification for Waterproofing of Underground Engineering" for construction projects as an example, the specification stipulates that The requirement of concrete anti-seepage water pressure is determined by the buried depth of the structure, and whether the anti-seepage water pressure of concrete meets the requirements is determined by the step-by-step pressurization method in a stress-free state. However, the load on the actual engineering structure will cause damage to the concrete such as microcrack propagation, w...

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Problems solved by technology

[0002] At present, there are different methods for the anti-seepage design of concrete structures in my country, but none of them consider the impact of the load on the actual structure on the anti-seepage performance of concrete. Taking the "Technical Specification for Waterproofing of Underground Engineering" for construction projects as an example, the specification stipulates that Determine the anti-seepage water pressure requirements of concrete based on the buried depth of the structure, and determine whether the anti-seepage water pressure of the concrete meets the requirements by step-by-step pressurization method in a stress-free state

However, the load on the actual engineering structure will cause damage to the concrete such as microcrack propagation, which in turn affects the impermeability of the concrete. Therefore, the existing concrete impermeability design regulations are one-sided.

In addition, when improving the impermeability of concrete by adding fibers in practical engineering applications, most of them can only determine the fiber content based on the test results, or even rely on experience to determine the fiber content. The lack of quantitative design basis will affect the fiber The economy and reliability of concrete anti-seepage are adversely affected

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