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Method and device for automatically detecting thicknesses of penetration type dregs

An automatic detection device and sediment thickness technology, which is applied to the rapid and accurate measurement of the sediment thickness at the bottom of bored piles, the penetration type sediment thickness automatic detection device, and the penetration type sediment thickness automatic detection field can solve the lack of automatic readings, Problems such as rapid measurement and automatic analysis, difficulty in on-site handling and operation

Inactive Publication Date: 2012-03-21
INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to provide sufficient load, the equipment of the static penetration method must be very large, and it is very difficult to carry and operate on site, and after each measurement is completed, the measuring instrument must be lifted to the ground to read the sediment thickness value, lacking automatic reading, Rapid determination and automated analysis capabilities

Method used

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  • Method and device for automatically detecting thicknesses of penetration type dregs
  • Method and device for automatically detecting thicknesses of penetration type dregs
  • Method and device for automatically detecting thicknesses of penetration type dregs

Examples

Experimental program
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Effect test

Embodiment 1

[0059] A method for automatic detection of penetrating sediment thickness, the detection method is:

[0060] A. Determine the position of the top surface of the sediment by preloading (arbitrary choice);

[0061] B. Hammering the probe to penetrate into the sediment until the undisturbed soil (natural formation);

[0062] C. Measure the amount of penetration (that is, the displacement of the probe), and record the corresponding hammering number;

[0063] D. Find out the inflection point on the relationship curve between penetration amount and impact number;

[0064] E. Determine the sediment thickness.

Embodiment 2

[0066] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0067] 1. Implementation structure

[0068] 1. Overall structure and connection relationship:

[0069] according to figure 1 As shown, the penetrating sediment thickness automatic detection device is composed of a test probe 1, a steel cable 2, a cable 3, a thin cable 4, an instrument control box 5, a control processing unit 6 and a winch 7. According to the design requirements of the test probe 1, the maximum length of the steel cable 2 and the cable 3 can be configured to be 200 meters, and the load-bearing capacity can reach 100 kilograms. Steel cable 2 can be wound on the winch by motor traction, also can be manually traction. The test probe 1 is connected with the other end of the steel cable 2, the cable 3 and the thin cable 4, and the actions of lowering, lifting and displacement can be implemented through the steel cable 2. The instrument control box 3 and...

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Abstract

The invention discloses a method and a device for automatically detecting the thicknesses of penetration type dregs. The method for automatically detecting the thicknesses of penetration type dregs comprises the steps of: determining the top surface positions of the dregs in a prepressing way; hammering a probe so that the probe penetrates to the dregs till undisturbed soil; measuring penetrationamount, and recording corresponding hammering times; finding an inflection point of a relation curve of the penetration amount and the hammering times; and determining the thicknesses of the dregs. The device comprises a test probe, an instrument control box, a control processing unit and a winch, wherein the test probe is sequentially connected with a steel cable, an electric cable and a cablet,the steel cable is fixed and wound on the winch, and the electric cable is connected with the instrument control box; the instrument control box is connected with the control processing unit by the electric cable; the steel cable is also connected with a hammer, and the electric cable is connected with an electric cable joint; a prepressing disc and an inner cylinder body are fastened into a whole through a fixing bolt; the center of the inner cylinder body is provided with a through hole, and the test probe is positioned in the through hole; and an outer protection sleeve, the prepressing disc and an outer cylinder body seal the test probe through a sealing ring. The invention has simple operation process, high testing accuracy and speed as well as automatic recording and analyzing.

Description

technical field [0001] The invention relates to the technical field of fast positioning, real-time measurement and automatic analysis of the sediment thickness at the bottom of bored piles based on preloading, impact and local displacement, and more specifically relates to a penetrating sediment thickness automatic The detection method also relates to a penetrating automatic sediment thickness detection device, which is especially suitable for rapid detection of the bottom sediment thickness of deep holes (greater than 100 meters), water-filled (mud) and bored cast-in-situ piles that cannot be reached by personnel. Measure precisely. Background technique [0002] Pile bottom sediment is the loose slag or slag remaining at the bottom of the pile formed after the drill bit breaks the rock and soil mass during drilling. The existence of excessively thick sediment will affect the bearing capacity of the pile and cause excessive settlement of the pile. The current relevant natio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D1/00E02D5/36
Inventor 王川婴胡胜韩增强
Owner INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI