A pile foundation torsion resistance, tensile torsion resistance, compression torsion resistance detection system and method

Abstract

The invention relates to a pile foundation torsion resistance, tensile torsion resistance and compression torsion detection system and method, including a base, a pile foundation, a pile top steel plate, a reaction frame, a reference beam and a torsion angle measuring device; the pile foundation above the ground Two steel rod passages are opened on the top, the base is placed on the ground at the root of the pile foundation, and the base is composed of two semi-circular steel plates, which surround the pile foundation; the steel bars at the top of the pile foundation and the pile top steel plate Welding, welding steel blocks on the base to support the horizontal jack and provide torque; placing a vertical jack for tensile torsion detection on the base; placing a compressive torsion detection on the pile top steel plate A vertical jack; a torsion angle measuring device is set up on one side of the pile foundation and the base, and the torsion angle measuring device includes two left and right support rods and a scale built between them. The invention is simple, convenient, easy to operate, good in accuracy and suitable for popularization and application.

Description

technical field [0001] The invention relates to the field of civil engineering, in particular to a detection system and method for pile foundation torsion resistance, tensile torsion resistance and compression torsion resistance. Background technique [0002] With the rapid development of the economy, a large number of super high-rise buildings, transmission line towers, offshore wind power towers, offshore drilling platforms, etc. use pile foundations. Compared with ordinary projects, this type of project is often subjected to horizontal loads such as large wind loads, wave loads, and ship and vehicle impact loads on the superstructure. These horizontal loads are often transmitted to the pile foundation in the form of eccentric loads, causing the pile foundation to bear the effect of torque on the basis of conventional vertical force, horizontal force and bending moment. In ordinary projects, the torque load is usually small, and the design of the horizontally loaded pile ...

AI Technical Summary

Problems solved by technology

In ordinary projects, the torque load is usually small, and the design of the horizontally loaded pile can meet the bearing capacity requirements. However, for this type of project, the torque load it receives may increase to a larger value at a certain moment , making the pile foundation designed for ignoring the torque load unsafe

For example, two high-rise buildings in the United States did not consider the influence of torque on the bearing capacity of pile foundations in the design stage. When they were hit by hurricanes, the pile foundations produced permanent torsional deformation, which caused huge losses; The foundation piles at the end of the pile wharf were severely damaged by the earthquake, mainly because the wharf not only produced translational motion but also a non-negligible torsion when the earthquake occurred, which made the foundation piles distributed at the end of the wharf more difficult than the foundation piles located at other positions of the wharf. more damage

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