Prefabricated packing expanding key type excavation foundation for power transmission line and construction method thereof

Abstract

The invention discloses a prefabricated packing expanding key type excavation foundation for a power transmission line and a construction method thereof. The foundation comprises concrete assemblies,prestressed reinforcements and prefabricated root keys, wherein the concrete assemblies are packing expanding components, the middles of the concrete assemblies are of hollow structures, a plurality of through reserved prestress holes are formed in the concrete assemblies in the height direction, a plurality of root key reserved holes are formed in the concrete assemblies in the bottom surface direction, the plurality of concrete assemblies are sequentially stacked in a foundation pit, the prestressed reinforcements penetrate through the corresponding reserved prestress holes in the multiple concrete assemblies to enable the concrete assemblies to be assembled to form a foundation body, and the prefabricated root keys penetrate through the root key preformed holes to be inserted into the side wall of the foundation pit. According to the prefabricated packing expanding key type excavated foundation, the construction period can be remarkably shortened, the synergistic effect of the foundation and a soil body is brought into full play, the horizontal load resistance and the overturning resistance of the foundation are improved, and the construction safety risk and the construction cost are reduced.

Description

technical field [0001] The invention relates to the technical field of iron tower foundations for transmission lines, in particular to a prefabricated expansion plate root key type excavation type foundation for transmission lines and a construction method thereof. Background technique [0002] More and more transmission lines pass through mountainous areas such as high mountains and steep mountains, and at the same time face the difficulties of complex service environments such as saline soil and frozen soil and the lack of building materials. The prefabricated foundation has the advantages of fast construction, easy quality control, good durability, and centralized transportation of building materials. Foundation types such as excavated slab foundations and pile group foundations cause large damage to the terrain and the environment, so they are widely used in mountainous power transmission lines and tower sites with high environmental protection requirements. Combining t...

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Problems solved by technology

[0006] Aiming at the disadvantages of poor reliability of the uplift bearing capacity of the foundation in the prior art, the purpose of the present invention is to provide a prefabricated expansion plate root key type excavation type foundation for power transmission lines and its construction method, which has the advantages of fast construction and reliable foundation High performance, strong applicability, environmental friendliness and other advantages

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