Composite foundation frame and its construction technology for transmission towers in steep mountainous areas

Abstract

The invention discloses a composite base framework used for a power transmission tower in a steep mountainous area. The composite base framework comprises a master base, a slave base and a main binding beam, wherein the master base comprises a master base main post and a master base expanding bottom; the master base main post comprises a master base compact exposure section and a master base embedding section; the slave base comprises a slave base main post and a slave base expanding bottom, wherein the slave base main post comprises a slave base compact exposure section and a slave base embedding section; the main binding beam is provided with a main binding beam main reinforcement, main binding beam reinforcement stirrups, a main binding beam non-reinforcement stirrup and main binding beam end part anchorage reinforcements. The invention also provides a construction technology of the composite base framework used for the power transmission tower in the steep mountainous area. The composite base frame system with the binding beam is adopted to replace a traditional means that the base main post is deepened and thickened or a multi-post bearing platform is adopted, the horizontal bearing performance of the base main post can be effectively improved, the horizontal displacement of the base main post is reduced so as to reduce the use amount of base concrete and reinforcing steel bars, and the invention performs a prominent engineering significance on environment protection, conservation of water and soil and terrain condition adaption.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a mother-child foundation frame for transmission towers in steep mountainous areas and a construction process thereof. Background technique [0002] With the development of my country's electric power construction, transmission line corridors are becoming more and more scarce, and the conditions of the location of the transmission tower foundation of the transmission line are getting worse and worse, especially for mountainous transmission lines, the transmission tower foundation will inevitably be located on the top of the mountain or halfway up the mountain, etc. Steep terrain. The conventional design often adopts the cooperation of the all-round long and short legs of the transmission tower and the unequal height foundation, which can avoid the high slope problem caused by the construction of a large number of squares to a certain extent. [0003] However, when the tra...

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Problems solved by technology

[0005] In view of the disadvantages of the above-mentioned existing design methods, such as large base exposed height, large displacement at the top of the base, and poor economy, the purpose of the present invention is to provide a mother-child foundation frame and its construction technology for transmission towers in steep mountainous areas. The unique "Mother-in-Child Foundation" frame system can effectively improve the horizontal bearing capacity of the main column of the foundation, reduce the horizontal displacement of the column of the foundation, and thus reduce the amount of concrete and steel bars used in the foundation

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