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Method for probing hidden trouble of pile bottom before pouring pile foundation and probing device thereof

A pile bottom and hidden danger technology, applied in the field of applied geophysics, can solve the problems of pile foundation safety hazards, inconvenient construction operations, difficult data interpretation, etc., and achieve the effect of improving accuracy and credibility

Pending Publication Date: 2018-01-30
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology helps detect hidden threats on underground pipes more accurately by combining multiple sensor arrays with different types of waves that are reflected from them. By analyzing these sensors' data together they can identify potential hazards or damage within those areas being explored for maintenance purposes.

Problems solved by technology

This patented describes various techniques aimed towards improving the efficiency and precision of detecting buried objects during excavating operations without requiring expensive tools like drill rigs or hydraulics. Current technologies involve either destructively scanning the entire ground area around the object being worked into place before analysis, but these require significant costs due to their complexity and lengthy process steps. Additionally, current methods often result in poorly detected fault indicators caused by noise reflections within the soil surrounding the target region.

Method used

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  • Method for probing hidden trouble of pile bottom before pouring pile foundation and probing device thereof
  • Method for probing hidden trouble of pile bottom before pouring pile foundation and probing device thereof
  • Method for probing hidden trouble of pile bottom before pouring pile foundation and probing device thereof

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Embodiment 1

[0051] Such as figure 1 As shown, the present invention provides a hidden danger detection device at the bottom of the pile before pouring of the pile foundation, including a pile hole 1, a multi-channel synchronous seismometer 2, a seismic source 3, a sensor 4 and a seismic source point 5 arranged in the pile hole 1;

[0052] The sensors 4 are horizontally arranged with the central axis of the pile hole 1 as the center, and are connected to the multi-channel synchronous seismograph 2 through signal cables; Horizontal sensor area array or multiple sets of horizontal sensor area arrays with equally spaced depths. Preferably, there are 1 to 24 sensors 4 . When there is one sensor 4, the sensor 4 is arranged on the central axis of the pile hole 1; when there are two or more sensors 4, they are symmetrically arranged to form a horizontal sensor surface array, which can be as follows Figure 2a The arrangement of a group of horizontal sensor arrays shown can also be as follows ...

Embodiment 2

[0059] If there is no mud liquid in the pile hole and it is inconvenient to inject water into the pile hole for exploration, drill the blasthole vertically in the center of the pile bottom of the pile hole, and vertically arrange the vertical array source points at equal intervals in the blasthole. The surface of the blast hole at the bottom is equipped with a horizontal sensor array. The sensor 4 is a speed sensor or an acceleration sensor. The preferred blast hole depth is 2 to 5 meters. All the other devices are consistent with Example 1.

Embodiment 3

[0061] As the pile hole shown in embodiment 1, the pile diameter of the pile hole is 1.50 meters, and the depth of the pile hole is 15 meters (using impact to form a hole), and the pile hole is full of mud liquid before pouring; A circular sponge with a pile diameter of about 5 cm thick is used as a sound-absorbing device. Four hydrophones are distributed symmetrically about the central axis of the pile hole to form a horizontal hydrophone array. The hydrophones are uniformly sunk 2.0m below the slurry Depth; the hydrophone signal is output to 4 synchronous seismographs; on the central axis of the pile hole, 8 source points are vertically arranged at a distance of 1.0 m from 3 meters below the mud liquid surface to form a vertical array of source points. The seismic source excites seismic waves from top to bottom in sequence and uses 4 synchronous seismographs to collect 8 groups of shot records. Each group of shot records has 4 hydrophone signals, which come from four directio...

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Abstract

The invention provides a method for probing hidden trouble of a pile bottom before pouring a pile foundation and a probing device thereof. Sensors are arranged in a lateral array with the central axisof a pile hole as the center under the surface of the liquid in the pile hole before pouring the pile foundation to form a horizontal sensor surface array. Seismic source points are arranged in a vertical array below the horizontal sensor surface array with the central axis of the pile hole as the center to form a vertical array seismic source point. The signal is emitted through the seismic source, and seismic waves are emitted through the seismic source points. The sensors receive the seismic waves and transmit the signal to a multi-channel synchronous seismograph. The multi-channel synchronous seismograph receives the signal to complete data acquisition. The method for probing the hidden trouble of the pile bottom before pouring the pile foundation and the probing device thereof can obtain the seismic records beneficial for separating the up and down waves of the seismic waves in the unpoured pile hole, and obtain the relevant information of the hidden trouble of the engineering geology of the pile foundation and the pile bottom by a traveling wave separation algorithm and a seismic migration imaging algorithm, so that the extraction and processing of the subsequent informationare facilitated to obtain the the hidden trouble of the engineering geology of the pile foundation and the pile bottom.

Description

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Claims

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Application Information

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Owner CENT SOUTH UNIV
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