Miniature vertical-oblique combined pile for power transmission tower

Abstract

The invention relates to a miniature vertical-oblique combined pile for a power transmission tower. The miniature vertical-oblique combined pile comprises standing columns, bearing platforms, a connecting beam and miniature piles. One standing column is disposed in the middle of the top end of each bearing platform. The adjacent bearing platforms are connected through the connecting beam. The miniature piles are evenly disposed at the bottom of each bearing platform. The miniature vertical-oblique combined pile has the advantages that the bearing platforms are connected into an integral structure by the connecting beam, force borne between the bearing platforms is coordinated, sedimentation difference between foundations can be reduced, and destroying of the power transmission tower on the upper portion due to uneven sedimentation of several tower legs is avoided; by the miniature vertical and oblique piles, the requirements of pressure resistance, pulling resistance and overturn resistance are satisfied, horizontal force resistance is increased, force bearing performance by completely using the vertical piles can be improved effectively, and foundation deformation under complex loads is reduced.

Description

technical field [0001] The invention belongs to the technical field of pile arrangement in power transmission and transformation line engineering, in particular to a miniature vertical and inclined combined pile for power transmission towers. Background technique [0002] The transmission tower is a high-rise structure with a large number of projects and is very important. The tower foundation is used to provide load support for the transmission line tower. It is an important part of the transmission line engineering structure. For the transmission line tower foundation in soft soil areas, it is inevitable to pass In some mud swamp areas, for such weak geological conditions, the conventional method is to use combined foundations and large-diameter cast-in-place pile foundations, but the joint foundation has a large amount of excavation, the amount of foundation steel and concrete is large, and the cost of the foundation is high; while cast-in-place single piles Due to the re...

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Problems solved by technology

[0002] The transmission tower is a high-rise structure with a large number of projects and is very important. The tower foundation is used to provide load support for the transmission line tower. It is an important part of the transmission line engineering structure. For the transmission line tower foundation in soft soil areas, it is inevitable to pass In some mud swamp areas, for such weak geological conditions, the conventional method is to use combined foundations and large-diameter cast-in-place pile foundations, but the joint foundation has a large amount of excavation, the amount of foundation steel and concrete is large, and the cost of the foundation is high; while cast-in-place single piles Due to the requirements of the bearing capacity, the diameter and pile length of the foundation are often relatively large. However, due to the limitations of road conditions and terrain, it is difficult for large-scale machinery to reach the position of the vertical tower, and small machinery cannot meet the pile diameter requirements. In view of this situation, there is an urgent need Configure a more reasonable foundation type to reduce construction difficulty and engineering volume, reduce damage to the natural environment, and reduce project cost; and micro piles, as a new type of foundation applied in transmission line engineering, can better solve conventional foundations weakness

[0003] At present, the micropile foundation in the construction of transmission line towers generally adopts an independent foundation under a single tower leg, such as figure 1 As shown, the upper tower has four tower legs, and each tower leg is supported by an independent foundation. Each independent foundation is composed of columns, caps and micro piles, and micro piles are evenly distributed under the caps. The micro piles Generally, all vertical piles are used, and the anti-overturning performance is poor

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