Foundation type for power transmission tower and bearing capacity calculation method for same

Abstract

The invention discloses a foundation type for a power transmission tower and a bearing capacity calculation method for the same. The foundation type comprises a reinforced concrete foundation pile partially buried below a design ground, concrete steps completely buried below the design ground, and a reinforced concrete bottom plate completely buried below the design ground, wherein the reinforced concrete foundation pile, the concrete steps and the reinforced concrete bottom plate are integrally poured, the concrete steps are cemented on the reinforced concrete bottom plate, the reinforced concrete foundation pile is cemented on the concrete steps, and the reinforced concrete foundation pile is connected with the concrete steps and the reinforced concrete bottom plate via foundation pile stressed steel bars; a concrete cushion is paved below the reinforced concrete bottom plate, a plurality of bottom plate stressed steel bars and a plurality of bottom plate stirrups are arranged in the reinforced concrete bottom plate, and the bottom plate stirrups are bound on the bottom plate stressed steel bars. According to the foundation type for the power transmission tower and the bearing capacity calculation method for the same disclosed by the invention, the dosages of foundation bottom plate concrete and steel bars are furthest saved on the premise of meeting requirements on the bearing capacity of the foundation, thus saving engineering cost and construction cost.

Description

technical field [0001] The invention belongs to the field of tower foundations for high-voltage and ultra-high-voltage transmission lines, and in particular relates to a foundation type of a transmission tower and a calculation method for its bearing capacity. Background technique [0002] At present, in the field of domestic overhead transmission lines, there are two types of excavation and backfill foundation base plates: rigid step type and flexible plate type. The rigid stepped foundation floor is completely composed of concrete steps, the number of steps is large, and the amount of concrete materials is large, and the cost is relatively high. The flexible slab foundation is generally composed of two layers of steps. When the upper load is large, it can also be made into three layers of steps. The upper and lower sides of each step are equipped with stressed steel bars, and the height-to-width ratio of the steps is set at 1:2.5. [0003] In the process of realizing the ...

AI Technical Summary

Problems solved by technology

This foundation type improves the ability to resist the upper load to a certain extent, but when the foundation has two or three steps, the stressed steel bars in the second and third steps are structural reinforcements, which are not controlled by the upper load. The setting of this part of reinforcement will inevitably increase the amount of reinforcement in the foundation and increase the construction cost of the foundation.

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