Method for detecting diameter of rotary jet grouting pile

A technology of transmission method and rotary grouting pile, which is applied in the field of measurement and testing, can solve the problems that the diameter of the rotary grouting pile is difficult to control, difficult to detect, and there is no detection of the diameter of the rotary grouting pile, so as to save money and cost investment, and the investment is not damaged , The effect of simple detection steps

Active Publication Date: 2016-07-20
CHONGQING UNIV
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Problems solved by technology

Compared with other piles, the pile diameter of the rotary grouting pile is not easy to control, and it is not easy to detect
At present, the high and low strain method, acoustic wave transmission method, drilling coring method, etc. are often used in engineering to detect the integrity and strength of concrete piles, but there is no method to directly detect the diameter of the jet grouted pile by using the acoustic wave transmission method

Method used

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  • Method for detecting diameter of rotary jet grouting pile

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Embodiment Construction

[0021] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0022] As shown in the figure, the method for detecting the pile diameter of the rotary grouting pile by the acoustic wave transmission method in the present invention comprises the following steps:

[0023] 1) Determine the geological conditions of the pile to be tested, and use the pile outer hole transmission method to evenly arrange a number of acoustic tubes 2 on the outside of the pile to be tested and keep the acoustic tubes 2 in parallel. The transducers 3 should be positioned at the same elevation; because sound waves attenuate extremely quickly in the soil, the acoustic measuring tube 2 should be placed close to the pile without damaging the integrity of the jet grouting pile to be tested.

[0024] 2) Select an easy-to-measure point on the pile to be measured as the reference point, use the acoustic wave transmission method to mea...

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Abstract

The invention discloses a method for detecting the diameter of a rotary jet grouting pile. Whether the upper and lower parts of a rotary jet grouting pile to be detected are consistent in diameter is judged by comparing the upper and lower points of the pile in such aspects as sonic time, amplitude of first wave and curve integrity, the detection result is processed to get the diameters at different points, and the obtained diameters of the rotary jet grouting pile are verified by use of a calculation formula. The detection result is more accurate and reliable, and the construction parameters can be changed in a timely manner in the process of construction to make the upper and lower parts of the rotary jet grouting pile consistent in diameter. Through the detection method, quick nondestructive detection of the diameter of a rotary jet grouting pile is realized, money and cost are saved, and deviation can be corrected in time according to the detection result to ensure the engineering quality.

Description

technical field [0001] The invention belongs to the field of measurement and testing, and in particular relates to a method for detecting the diameter of a rotary grouting pile by means of an acoustic wave transmission method. Background technique [0002] High-pressure rotary grouting piles are widely used in foundation engineering, tunnel engineering and other projects, and their quality inspection is very important. The pile diameter of the rotary grouting pile has a great influence on the bearing capacity of the pile, which determines the quality of the project. Compared with other piles, the pile diameter of the rotary grouting pile is not easy to control and not easy to detect. At present, the high and low strain method, acoustic wave transmission method, drilling coring method, etc. are often used in engineering to detect the integrity and strength of concrete piles, but there is no method to directly detect the diameter of jet grouted piles by using the acoustic wav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B17/00G01N29/04E02D33/00
CPCE02D33/00G01B17/00G01N29/04
Inventor 赵瑜胡波沈维克
Owner CHONGQING UNIV
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