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Reinforcement cage length non-destructive test method in pile foundation and device used

A technology of non-destructive testing and steel cages, applied in measuring devices, using electrical devices, using electromagnetic means, etc., can solve the problems of high cost and slow detection speed, and achieve the effects of simple construction, improved efficiency, and high efficiency

Inactive Publication Date: 2009-04-29
CHINA UNIV OF GEOSCIENCES (WUHAN)
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Problems solved by technology

[0006] The purpose of the present invention is to overcome the disadvantages of high cost and slow detection speed due to the need to drill holes beside the pile in the existing method for detecting the length of the reinforcement cage, and provide a method for non-destructive detection of the length of the reinforcement cage in the pile foundation and the device used, This method realizes the detection of the length of the steel cage in the pile foundation by measuring the electrical parameters on the ground surface, does not need to excavate and drill holes, the equipment used is simple, the operation is convenient, and the detection cost is low

Method used

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  • Reinforcement cage length non-destructive test method in pile foundation and device used
  • Reinforcement cage length non-destructive test method in pile foundation and device used
  • Reinforcement cage length non-destructive test method in pile foundation and device used

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Embodiment 1

[0032] Embodiment 1: The method for detecting the length of the steel cage in the pile foundation of the present invention is provided. The schematic diagram is as follows: figure 1 Shown. This method adopts the principle of charging method. First, the steel cage in the standard pile is equivalent to a long electrode. The steel cage 2 is supplied with power through the power supply 1 to generate a stable electric field, and the electrical parameters of the ground surface (including voltage , Capacitance and / or inductance), derive the relationship between the electrical parameters at the standard pile and the length of the steel cage; analyze the electrical parameters of the steel cage length detection in the pile foundation, and show the results with a graph (see attached Figure 4-9 form). When detecting the length of the reinforcing steel cage 2 in the pile foundation, the storage battery can be used to provide a stable electric field (that is, the power supply is stable) to the...

Embodiment 2

[0034] Embodiment 2: The device for detecting the length of the steel cage in the pile foundation in the present invention, the schematic block diagram of the structure is as follows image 3 As shown, the device mainly includes a host, a power supply, and measuring electrodes. The host, power supply and measurement electrodes are connected by cables / wires. The power supply includes a power supply to the host and a ground-transmitting power supply. The positive A of the ground-transmitting power supply and the reinforcement cage edge The negative pole B is theoretically connected to the ground at infinity. In actual use, the midpoint of MN is marked as O. The theoretical infinity is more than 10 times the AO distance. The host includes the main board, analog circuit, photoelectric control knob, memory, touch screen display, transmitting electrode, JTAG interface and communication interface. The steel cage is used as the measuring electrode M, and the other measuring electrode N is...

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Abstract

The invention provides a method and a device for the nondestructive examination on the length of reinforcement cages in pile foundations. The method comprises the following step of supplying power for a reinforcement cage in a standard pile so as to generate a stable electric field, measuring electrical parameters of ground surface of the standard pile, deriving the relation between the electrical parameters of the standard pile and the length of the reinforcement cage, stably supplying power for the pile foundations of a place in need of examination, as well as the periphery thereof, so as to generate a stable electric field, measuring the actual electrical parameters of the ground surface of the place and contrasting the obtained actual electrical parameters with the relation between the electrical parameters of the standard pile and the length of the reinforcement cage, so as to judge whether the length of the reinforcement cage in the pile foundations of the place in need of examination is in shortage. The device comprises a host, a power source and a measuring electrode which are connected with one another through cables / wires. The method has the advantages of simple construction and high efficiency. The device is in modularized arrangement, is simple to operate, and has broad application prospects in the field of engineering quality examination.

Description

Technical field [0001] The invention relates to a method and a device used for nondestructive detection of the length of a steel cage in a pile foundation, in particular to a method and device for nondestructive detection of the length of a steel cage in a cast-in-place pile in modern engineering quality detection. It belongs to the field of engineering quality inspection. Background technique [0002] The detection of the length of the steel cage in the pile foundation is an important part of the quality detection of the pile foundation. At present, my country's engineering construction is developing rapidly, and pile foundations have been widely used in various infrastructure construction fields such as construction engineering, highway engineering, railway engineering, water conservancy and hydropower, and national defense engineering. It can be said that the quality and safety of the pile foundation determines the safety of the entire project. However, my country has a vast t...

Claims

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Application Information

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IPC IPC(8): G01B7/02E02D33/00
Inventor 王传雷李江坤葛健程飞朱金星
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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