Limited prestressed precast concrete foundation, communication tower building and construction method

Abstract

A limited prestressed prefabricated concrete foundation, comprising: a plurality of strip-shaped prefabricated concrete blocks arranged side by side, a single strip-shaped prefabricated concrete block is provided with a plurality of through holes in the cross section, and adjacent strip-shaped prefabricated concrete blocks are in contact with each other And the through holes are in the corresponding positions; a plurality of prestressed steel strands equal to the number of through holes, the prestressed steel strands pass through the through holes; two anchors are respectively connected to the two ends of the prestressed steel strands Fixed, prestressed strands are limited prestressed strands. Under the action of limited prestress, the precast concrete blocks will not be disengaged under normal wind loads and will remain in close contact; under design wind loads, although the limited prestress is not enough to ensure that the concrete blocks will not be disengaged, it can pass through the concrete The mutual pressure between blocks and the tension of a layer of steel strands ensure the safety of the basic structure. Therefore, the foundation of the invention not only ensures the overall structure, but also reduces the prestress of the steel strands and improves the reliability of the structure.

Description

technical field [0001] The invention relates to a concrete foundation component, in particular to a prestressed prefabricated concrete foundation, and belongs to the technical field of construction. Background technique [0002] The foundation of vertical communication towers generally adopts raft foundation and pile foundation according to differences in geological conditions and construction conditions. This kind of foundation has a large workload on site, a long construction time, and a great impact on the surrounding environment. [0003] With the gradual promotion of prefabricated assembly structures, prefabricated assembly foundations have also been applied on a large scale in the field of communication towers. There are two main types of existing prefabricated foundations: non-prestressed and fully prestressed. Among them, the non-prestressed prefabricated foundation is relatively simple in construction, but the integrity of the foundation is not good, and the tower ...

AI Technical Summary

Problems solved by technology

Among them, the non-prestressed prefabricated foundation is relatively simple in construction, but the integrity of the foundation is not good, and the tower structure is prone to large deformation under strong wind conditions or when the manufacturing error is large

The prefabricated foundation of the fully prestressed structure has good structural integrity, but it needs to apply a lot of prestress to the concrete structure, which makes the construction difficult. At the same time, the prestressed steel bars or steel strands are always under great tension, which affects the structure. reliability

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