Steel structure assembly type root key foundation for power transmission line and construction method

Abstract

The invention discloses a steel structure assembly type root key foundation for a power transmission line and a construction method. The foundation comprises a foundation bottom plate and a foundation support. The foundation bottom plate comprises bottom profile steel, root key connecting profile steel, middle profile steel and root keys; the multiple pieces of bottom profile steel are arranged at intervals, and the multiple pieces of middle profile steel are arranged at intervals and fixedly connected with the tops of the multiple pieces of bottom profile steel in a staggered manner; the multiple pieces of root key connecting profile steel are arranged in an up-down staggered manner and fixed to form two layers, the multiple pieces of root key connecting profile steel on each layer are arranged at intervals, the root key connecting profile steel on the lower layer and the tops of the middle profile steel are fixedly connected in a staggered manner, and the root key connecting profile steel on the upper layer is fixedly connected with the bottom of the foundation support; and the end portions of the root key connecting profile steel on each layer are fixedly connected with the root keys, and the root keys stretch into undisturbed soil around a foundation pit. The foundation is completely composed of spliced steel components, the unit weight is small, transportation and field installation are convenient, and the rapid, convenient and economical construction purpose can be achieved.

Description

technical field [0001] The invention belongs to the field of assembled foundations for transmission lines, and in particular relates to a steel structure assembled root key foundation for transmission lines and a construction method. Background technique [0002] At present, the general design and the commonly used large-excavation metal plate column assembly foundation are suitable for tower positions with gentle terrain. This type of foundation mainly uses the excavated disturbed and then backfilled soil to bear the uplift load, and cannot make full use of the strength of the original soil. In addition, due to its relatively complex structure, the backfill soil cannot be fully tamped, resulting in a low uplift bearing capacity of the foundation. In practical applications, concrete pouring is added to the bottom slab, which increases the concrete operation process and construction. Difficulty and construction period. In addition, the existing foundation layout and force tr...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the large-excavation metal plate column assembly type foundation commonly used in the prior art cannot fully utilize the strength of the undisturbed soil, the backfill soil cannot be fully compacted, the excavation area of ​​the earthwork is large, and it cannot be applied to mountainous terrain. , the purpose is to propose a steel structure assembled root key foundation and construction method for power transmission lines. The foundation of the invention is composed of spliced ​​steel components, which is light in weight, convenient for transportation and on-site installation, and can realize fast, convenient and economical The purpose of construction

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