Method for improving punching bearing capacity of concrete extended foundation

Abstract

The invention discloses a method for improving the punching bearing capacity of a concrete extended foundation. The method comprises the steps that 1, the punching bearing capacity of the concrete extended foundation is calculated based on the size of the concrete extended foundation; 2, whether the punching bearing capacity meets the requirement or not is judged based on the calculated punching bearing capacity of the concrete extended foundation; 3, when the punching bearing capacity of the concrete extended foundation does not meet the requirement, the situation that stirrups are added to the concrete extended foundation so that the punching bearing capacity of the concrete extended foundation can meet the requirement is preset, and the area and the collocating position range of the stirrups needing to be added are calculated; and 4, the stirrups are added to the concrete extended foundation based on the calculated area and the calculated collocating position range of the stirrups, and the technical effects that the safety of the foundation is improved, and the cost is low are achieved.

Description

technical field [0001] The invention relates to the field of design of concrete expanded foundations for power transmission lines of building structures, in particular to a method for improving the punching resistance of concrete expanded foundations. Background technique [0002] With the acceleration of UHV power grid construction, the foundation force of transmission line towers will also increase greatly. At present, the concrete expansion foundation is still one of the main forms of transmission line towers. When designing the extended concrete foundation, we strictly abide by the current national industry standard "Technical Regulations for the Design of Overhead Transmission Line Foundations" (DL / T 5219-2005), which stipulates that the step width-to-height ratio should not exceed 2.5. In order to meet this requirement of the specification, it is necessary to increase the height of the floor steps, which will greatly increase the amount of foundation concrete, and the...

AI Technical Summary

Problems solved by technology

[0006] The invention provides a method for improving the punching resistance of the expanded concrete foundation, which solves the problem of reducing the height of the foundation steps in the punching resistance method of the existing concrete expanded foundation, and the step width-to-height ratio of the expanded concrete foundation will exceed the specification limit; The height of the foundation steps and the punching shear bearing capacity of the expanded concrete foundation may not meet the technical requirements, and the technical effect of improving the safety of the foundation and lowering the cost is realized.

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