Method for manufacturing low-disturbance melt-resistant frozen soil foundation of transmission tower

Abstract

The invention relates to a method for manufacturing a low-disturbance melt-resistant frozen soil foundation of a transmission tower. The method comprises the following steps of: drilling a pile position by utilizing low disturbance, reaming the bottom end of the pile hole, placing a steel reinforcement cage and filling concrete to construct a foundation. The method provided by the invention is mature and is easy to operate by utilizing the low disturbance for drilling the pile hole, reaming and filling the concrete to form a pile; an emptying machine tool is simple; the steps of the method can be simultaneously carried out according to the requirements of a construction schedule in groups; a plurality of pile holes are synchronously constructed so that the construction period is shorted, the foundation is convenient to clean, soft soil at the bottom of the pile holes can be clearly cleaned, the construction quality is reliable, and the walls and the bottoms of the pile holes are convenient to check; a quality situation of soil at the bottoms of the pile holes can be checked, the diameter and the depth of the pile can change along with a bearing force situation, and the pile end can be enlarged manually so that the large bearing force can be obtained, the requirement on one pile with one column is met, the length of a construction line is shortened, and the construction cost and the construction period are remarkably reduced; and in addition, when each section of concrete is filled in the pile body, the concrete can be immediately tamped and the filling quality of the concrete is good.

Description

technical field [0001] The invention relates to a fabrication and construction method in the technical field of permafrost foundations in part E02D of the International Patent Classification, in particular to a fabrication method for low-disturbance and anti-thaw foundations on permafrost for power poles and towers. Background technique [0002] At present, power lines often need to cross the permafrost zone, and permafrost refers to the rock and soil that freezes below zero degrees Celsius and contains ice. With existing technologies, such as digging holes with mechanical equipment, installing prefabricated pile foundations, and then backfilling them, etc. process, the foundation of overhead transmission lines in permafrost areas is often affected by the frost heaving and thawing of the foundation soil to varying degrees. Some line foundations have just been completed, but the upper tower structure has not yet been assembled due to frost heaving and thawing. The foundation h...

AI Technical Summary

Problems solved by technology

Therefore, the influence of frost heave and thaw settlement on the foundation on the foundation must be considered when making the foundation in the cold and frozen land zone. Lines often take multiple detours to avoid permafrost, which directly leads to a significant increase in construction period and investment