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Stratum abnormal discontinuous change depth measuring device based on acoustic emission during injection of prefabricated piles

A technology of prefabricated piles and acoustic emission, applied in foundation structure engineering, foundation structure testing, construction, etc., can solve problems such as waste of materials, increase of expenditure, and inability to guarantee complete reliability, etc., to reduce construction costs, reduce equipment costs, The effect of reducing the number of drilling and geological surveys

Active Publication Date: 2019-07-30
SUN YAT SEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Method 1 has great contingencies and uncertainties, because the geological survey results cannot be guaranteed to be completely reliable, and Method 2 will waste a lot of materials and increase the expenditure in the construction process

Method used

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  • Stratum abnormal discontinuous change depth measuring device based on acoustic emission during injection of prefabricated piles
  • Stratum abnormal discontinuous change depth measuring device based on acoustic emission during injection of prefabricated piles

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Embodiment Construction

[0030] Below in conjunction with accompanying drawing, the course of work of the present invention is further described:

[0031] A. Composition of the device

[0032] The device is composed of four parts, including piling device, monitoring device, transmission device and output system, as follows:

[0033] One, the piling device is made of prefabricated piles (2);

[0034] Two, the monitoring system consists of three connecting rods (9), three acoustic emission sensors one (6) installed on each connecting rod (9), two acoustic emission sensors (7), and three acoustic emission sensors (8);

[0035] Three, the transmission device is composed of a ground interpretation device (4) and a connecting circuit (10);

[0036] 4. The output device is composed of 5-ground control system.

[0037] B. Operation process of the device

[0038] The operation process of the device is divided into seven steps, as follows:

[0039] 1. Determine the location of the piling hole 2 - prefabric...

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Abstract

The invention relates to a stratum abnormal discontinuous change depth measuring device based on acoustic emission during injection of prefabricated piles, and belongs to the technical field of civilengineering instrument manufacturing. The stratum abnormal discontinuous change depth measuring device is composed of a pile driving device, a monitoring device, a transmission device and an output system, is the novel measuring device, and has the main value that first, the device can be reused, and the equipment cost is reduced; second, the abnormal discontinuous change of a stratum during piledriving is monitored, continuous stratum mutation, the karst roof thickness, the boulder burial depth and the like are detected and early-warned in advance, and the probability of engineering accidents is decreased; third, through a way of synchronously conducting prefabricated pile driving and monitoring, the frequency of drilling and geological exploration is decreased, and the construction costis lowered; and fourth, an acoustic emission sensor is matched with a ground interpretation device, a system is controlled for monitoring, operation is easy, transmission is convenient and rapid, results are accurate, and use is convenient.

Description

[0001] Technical field: [0002] The invention relates to a device for measuring the abnormal and discontinuous change depth of a stratum during the penetration process of a prefabricated pile based on acoustic emission, and belongs to the technical field of civil engineering instrument manufacturing. It is suitable for driving prefabricated piles in areas with abnormal and discontinuous changes in strata, and for real-time monitoring and early warning of sudden changes in underground unknown strata, karst, boulders, etc. [0003] Background technique: [0004] In recent years, with the continuous development and construction, the safety problems of piling have become increasingly apparent, and the disasters of piling have become increasingly prominent. When there are discontinuous changes in strata such as karst, boulders, sudden changes in continuous strata, etc., engineering accidents may occur if the specific location is not ascertained. There are two main methods of pilin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D33/00
CPCE02D33/00E02D2600/10
Inventor 周翠英高易刘镇
Owner SUN YAT SEN UNIV
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