High-strain detection method for prestressed foundation pile

Abstract

The invention belongs to the technical field of prestressed foundation pile detection, and discloses a high-strain detection method for a prestressed foundation pile. In order to solve the problems that an existing high-strain detection device is prone to toppling under eccentric hammer and a heavy hammer is prone to toppling, and a large potential safety hazard exists. The high-strain detection method makes full use of an existing prestressed foundation pile to fix a guide frame, and solves the problem that the guide frame cannot be stable in the field construction and a large potential safety hazard exists; and meanwhile, the guide frame is fixed to the prestressed foundation pile through a clamping device, and a vertical center line of the clamping device and a vertical center line ofthe heavy hammer are on the same straight line, so that the center position of the prestressed foundation pile can be hammered after the heavy hammer is free to fall, eccentric hammering is prevented,numerical values of sensors on the two sides of the prestressed foundation pile are quite close, the real bearing capacity and integrity of the prestressed foundation pile can be obtained conveniently, and the accuracy of the prestressed foundation pile detection is improved.

Description

technical field [0001] The invention belongs to the technical field of prestressed foundation pile detection, and in particular relates to a high strain detection method of prestressed foundation piles. Background technique [0002] High-strain testing is a testing method for judging the vertical compressive bearing capacity of a single pile and the integrity of the pile body. During the test, a heavy hammer (with a weight of 1%-1.5% of the estimated ultimate bearing capacity of the single pile) is used to impact the pile To make the prestressed foundation pile have sufficient penetration, measure the response of the resulting pile mass stress and acceleration, and determine the vertical bearing capacity of the single pile and the integrity of the pile through wave theory analysis. Impact the top of the pile with a heavy hammer to generate sufficient relative displacement between the pile and the soil, so as to fully stimulate the resistance of the soil around the pile and t...

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problems of eccentric hammering in the existing high-strain detection device and the fact that the heavy hammer is easily toppled after falling, the present invention provides a high-strain detection method for prestressed foundation piles, which can ensure There is no problem of eccentric hammering in the middle, which makes the sensor data on both sides of the prestressed foundation pile more real and improves the accuracy of the data; at the same time, it can prevent the heavy hammer from falling freely and will not cause the guide frame (or tripod, Support frame, fixed frame) topple over, so as to ensure the safety of staff and related instruments and equipment

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