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A special device for foundation pile high strain detection

A special device and high-strain technology, which is applied in infrastructure engineering, foundation structure testing, construction, etc., can solve problems affecting test quality, falling weight eccentricity, etc., and achieve the effect of simple use and convenient installation

Active Publication Date: 2018-05-04
常州华厦建设工程质量检测有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When manually knocking down or pulling off the hook, there is a strong moment, which leads to the eccentricity of the drop hammer, which affects the quality of the test

Method used

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  • A special device for foundation pile high strain detection

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Embodiment Construction

[0017] See figure 1 As shown, a special device for high strain detection of foundation piles includes a pile head fixing device 1, a guide frame 2 vertically arranged on the pile head fixing device 1, and a guiding drop weight rolling device 3 is arranged in the guide frame 2 in turn. , a combined hammer head 4, an automatic uncoupling device 5 and an electric lifting device 6, the electric lifting device 6 is arranged on the top of the guide frame 2, and a combined type is connected between the guide drop hammer rolling device 3 and the automatic uncoupling device 5 Hammerhead 4. The combined hammer head 4 is built in the guide frame 2, and it is composed of several steel plates 41, hammer bottom plates 42 and hammer top plates 43. There are round holes 44 at the same position on the four corners of the surface, the round holes 44 are inserted into the connecting rod, the end expansion head of the connecting rod is closely connected with the round hole of the hammer bottom p...

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Abstract

The invention discloses a special device for high-strain testing of foundation piles, which comprises a pile head fixing device and a guide frame vertically arranged on the pile head fixing device. head, an automatic uncoupling device and an electric lifting device, the electric lifting device is arranged on the top of the guide frame, an automatic uncoupling device is connected between the guide falling weight rolling device and the automatic uncoupling device, the automatic uncoupling device of the present invention preferably The problems caused by manual knocking down or pulling off are solved. For example, there is a strong moment when knocking down or pulling off, which leads to the eccentricity of the falling weight, resulting in poor free hammer test signal, which affects the test quality.

Description

technical field [0001] The invention relates to the technical field of foundation detection equipment for construction engineering, in particular to a special device for high strain detection of foundation piles. Background technique [0002] The high-strain method is to impact the top of the pile with a heavy hammer, measure the velocity and force time-history curve of the top of the pile, and use the wave theory analysis to determine the anti-bearing capacity of the single pile in the vertical direction and the integrity of the pile body. High-strain detection technology is developed from driven-in prefabricated piles. Piling test and pile driving monitoring are its unique functions (monitoring the pile body stress and hammer energy transfer ratio when the prefabricated pile is driven in), which cannot be done by static load test. arrived. [0003] According to the requirements of JGJ106-2014 "Technical Specifications for Inspection of Building Foundation Pile", DGJ32 / TJ1...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D33/00
Inventor 姚国平李秀芳张坚杜松杨骏
Owner 常州华厦建设工程质量检测有限公司