Device special for high strain test of foundation pile

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: 2016-03-02
常州华厦建设工程质量检测有限公司 +1
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  • Abstract
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  • Claims
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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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  • Device special for high strain test of foundation pile

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Embodiment Construction

[0017] See figure 1 As shown, a special device for high-strain testing 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 an automatic uncoupling device is connected between the guide drop hammer rolling device 3 and the automatic uncoupling device 5 device 5. 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. The four corners of the surface have round holes 44 at the same position. The round holes 44 are inserted into the connecting rod. The end expansion of the connecting rod is closely connected with the round hole of the hammer bottom plate...

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Abstract

The invention discloses a device special for a high strain test of a foundation pile. The device comprises a pile head fixing device and a guide frame which is vertically arranged on the pile head fixing device. A guide drop hammer rolling device, a combined hammer head, an automatic tripping device and an electric lifting device are sequentially arranged in the guide frame. The electric lifting device is arranged at the top end of the guide frame. The automatic tripping device is connected between the guide drop hammer rolling device and the electric lifting device. Through the automatic tripping device, the problems caused by manual knock-off or pull-off are well solved. For example, since large torque exists during knock-off or pull-off, decentration of a drop hammer is caused, test signals of a free hammer are poor, and accordingly test quality is affected.

Description

technical field [0001] The invention relates to the technical field of foundation testing equipment for construction engineering, in particular to a special device for high strain testing 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 / TJ142-2...

Claims

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Application Information

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Patent Type & Authority Applications(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
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