Narrow-foundation-tower single-pile pier-type self-stabilized foundation for power transmission line

Abstract

The invention discloses a narrow-foundation-tower single-pile pier-type self-stabilized foundation for a power transmission line. The narrow-foundation-tower single-pile pier-type self-stabilized foundation for the power transmission line comprises a single-pile foundation, a pier platform and small upright columns (11), wherein the upper end of a single pile is inserted into the center of the pier platform; the small upright columns (11) are positioned on the upper end surface of the pier platform; four independent tower leg upright columns of a narrow foundation tower are buried onto one pier platform; the pier platform is supported by the single-pile foundation buried inside soil; acting forces of four tower legs which are essentially not related to one another act on one point, and through mutual counteraction, a self-balancing aim is achieved; the conventional four independent foundations are changed into one self-stabilized single-pile foundation, so that the occupied area is obviously reduced, the cost of the foundation is reduced; the construction technology is simple, the construction period is significantly shortened, and the narrow-foundation-tower single-pile pier-type self-stabilized foundation is more safe and convenient.

Description

technical field [0001] The invention relates to a self-stabilizing foundation, in particular to a single-pile pier type self-stabilizing foundation of a narrow base tower of a power transmission line. Background technique [0002] At present, there are more and more high-voltage lines in urban planning areas, and the line corridors are becoming more and more tense. Ordinary iron towers cannot meet the requirements of urban high-voltage lines occupying less land. Generally, three methods are used to reduce urban land use, namely, steel pipe poles, cable buried tube and narrow base tower. [0003] The service conditions of steel pipe poles are higher than those of iron towers, and large machinery is required for erection, which has high requirements on the construction site environment and relatively inconvenient maintenance in the later stage; the investment in buried pipes for cables is large, and is too limited by factors such as underground pipelines and rivers, and later ...

AI Technical Summary

Problems solved by technology

Large excavation combined foundation is a kind of natural foundation, but it needs large-scale excavation. Construction in urban areas has a great impact on municipal facilities, and has high requirements on geological conditions, so it is rarely used. Generally, pile foundations are mainly used; ordinary cast-in-place piles The foundation is to arrange pile foundations separately under the four tower legs of the narrow foundation tower. The mutually independent foundations must satisfy both the uplift calculation and the downforce calculation. The configured foundation is relatively large

Especially for linear towers with small loads, it is not necessary in terms of bearing capacity requirements, but in order to meet the needs of structure and construction, a larger pile diameter has to be designed, which is very uneconomical in engineering applications; The pipeline network is densely covered, and the four-legged single pile foundation in complex areas often cannot be arranged, and the route is often changed to bypass or relocate underground pipelines. This often results in a large construction cost due to an obstacle

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