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Device and method for accurately measuring sediment thickness of cast-in-situ bored pile

A technology for bored piles and sediment thickness, which is used in the testing of foundation structures, construction, infrastructure engineering, etc., and can solve problems such as result correction, inaccurate starting reference points for measurement, and inability to accurately judge the upper surface of the sediment layer. , to increase the applicability, reduce the bottom pressure, and improve the accuracy

Active Publication Date: 2020-04-21
武汉中岩科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are more uncertain factors in the test, which affects the reliability of the test results
[0008] In addition, in the above methods, there is the problem that the upper surface of the sediment layer cannot be accurately judged, which makes the initial reference point of the measurement inaccurate and affects the accuracy of the test results; and the measured results are not corrected, which cannot truly reflect The thickness of the sediment layer

Method used

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  • Device and method for accurately measuring sediment thickness of cast-in-situ bored pile
  • Device and method for accurately measuring sediment thickness of cast-in-situ bored pile
  • Device and method for accurately measuring sediment thickness of cast-in-situ bored pile

Examples

Experimental program
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Effect test

Embodiment 1

[0060] Such as figure 1 with figure 2 As shown, a device for accurately measuring the sediment thickness of bored piles includes a host computer 1 located on the ground, a sediment probe 3 connected to the host computer 1 through a cable 2, and the sediment probe 3 includes a casing 4 and Chassis 5, the casing 4 is provided with an upper seal 6, a circuit board 7, a motor 8, a mechanical probe 9 and a lower seal 10 in sequence from top to bottom, and the mechanical probe 9 passes through the lower seal 10 and the chassis 5 protrude outward; four first pressure sensors 12 are evenly distributed on the bottom surface of the chassis 5;

[0061] The end of the mechanical probe 9 is provided with a second pressure sensor 13, which is used to record the real-time pressure value entering the sediment layer until the bottom of the sediment layer; the body of the mechanical probe 9 is also provided with an angle for measuring its inclination. Sensors (not shown in the figure, embedd...

Embodiment 2

[0071] This embodiment provides a working process of the device for accurately measuring the sediment thickness of bored piles in Embodiment 1, such as image 3 Shown is the flow chart of described workflow, and described workflow comprises the following steps:

[0072] Step (1), preparatory work, test described upper computer function, collect data, set relevant parameter in described upper computer;

[0073] Step (2), controlling the winch to lower the sediment probe through the cable;

[0074] Step (3), observing and recording the numerical change of the first pressure sensor below the chassis in real time during the lowering process;

[0075] Step (4), judging whether the chassis is lowered to the upper surface of the sediment layer according to the numerical change of the first pressure sensor under the chassis; Next step; if the value of the first pressure sensor is a steady and slow rising trend, then jump to step (3) and continue to lower the sediment probe;

[0076...

Embodiment 3

[0093] This embodiment provides a measurement method with the above-mentioned device for accurately measuring the sediment thickness of bored piles, and the measurement method includes the following steps:

[0094] Step 1: Install and set the host computer and sediment probe according to the site environment; debug the host computer and prepare for detection;

[0095] Step 2: control the upper computer to release the sediment probe, observe the value changes of each first pressure sensor under the chassis, and when the vertical of each first pressure sensor tends to be stable, the sediment probe just touches the sediment layer On the upper surface, stop lowering the sediment probe;

[0096] Step 3: According to the numerical value of each of the first pressure sensors, determine whether the counterweight of the chassis needs to be adjusted through the counterweight device; maintain stable contact between the chassis and the upper surface of the sediment layer, and control the ...

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Abstract

The invention discloses a device and a method for accurately measuring the sediment thickness of a cast-in-situ bored pile. The device comprises an upper computer and a sediment probe, wherein the sediment probe comprises a shell, a mechanical probe and a chassis; at least four first pressure sensors are uniformly distributed on a bottom surface of the chassis; a second pressure sensor, which is used for recording a real-time pressure value when entering a sediment layer to reach the bottom of the sediment layer, is arranged at an end part of the mechanical probe; an angle sensor for measuringan inclination angle of the mechanical probe is arranged on the body of the mechanical probe; the first pressure sensors, the second pressure sensor and the angle sensor are all electrically connected with the upper computer; and a counterweight device capable of being adjusted in real time is arranged on the chassis. Through the device and the method disclosed by the invention, the position of the upper surface of the sediment layer and the sediment thickness can be accurately judged, the inclination of the mechanical probe can be measured while measuring the pressure at the bottom of the chassis and the mechanical probe, a testing result can be corrected by integrating the pressure value and the inclination value, thereby obtaining an accurate sediment thickness.

Description

technical field [0001] The invention relates to the technical field of sediment thickness measurement, in particular to a device and method for accurately measuring the sediment thickness of bored piles. Background technique [0002] Sediment refers to the material that remains at the bottom of the hole after the drill bit breaks the rock and soil, and the cut rock and soil debris is mixed with the mud. Although the bottom of the hole has been cleaned repeatedly, it has not been completely removed. Due to the influence of gravity, buoyancy and mud resistance, the sediment deposited at the bottom is loose at the top and dense at the bottom, and the material above is mostly mud sediment, which is fluffy. With the pouring of concrete, most of it will be squeezed out. Return to the ground; the bottom is mostly broken debris, which can withstand the pressure and stay at the bottom of the pile during the concrete pouring process. The sediment thickness referred to in the code is ...

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 杨永波张琦涛邹宇尹中南李超胜张坤刘少平丁明珠
Owner 武汉中岩科技股份有限公司
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