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In-situ monitoring method, testing system and testing equipment for the rigidity of soil around pile

A test equipment and in-situ test technology, applied in radio wave measurement system, satellite radio beacon positioning system, signal transmission system, etc., can solve the problems of not fully considering the change of soil stiffness and the inability to simulate the interaction of short straight piles, etc.

Active Publication Date: 2021-07-27
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these disturbance zone models are based on the axisymmetric plane strain assumption and the homogeneous medium assumption, which cannot simulate the interaction of short straight piles, and these models do not fully consider the stiffness change of the soil in the vertical range

Method used

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  • In-situ monitoring method, testing system and testing equipment for the rigidity of soil around pile
  • In-situ monitoring method, testing system and testing equipment for the rigidity of soil around pile
  • In-situ monitoring method, testing system and testing equipment for the rigidity of soil around pile

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Experimental program
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Effect test

Embodiment 1

[0048] This embodiment discloses an in-situ test system for the stiffness of the soil around the pile, including the undisturbed soil shear wave velocity test equipment, a 5G base station, a data receiving station, a data processing PC, and a management terminal. like figure 2 and 3 As shown, wherein the undisturbed soil shear wave velocity test equipment includes an oscilloscope 12, a signal generator 13, a battery 14, a 5G antenna 15, a data collector 17, a solar cell 16 and a probe rod; the probe rod includes a horizontal fixed rod 1 and a vertical To the fixed rod 2, the horizontal fixed rod 1 is used to adjust the distance between the vertical fixed rods 2 on both sides and ensure that the vertical fixed rods 2 are in the same plane. The middle of the horizontal fixed rod 1 is fixed with a GPS positioning module 11, and the GPS positioning module 11 It is used to determine the location information of on-site measuring points, and is integrated with a micro-power wireles...

Embodiment 2

[0064] The present invention also discloses a method for monitoring the stiffness of the soil around the pile, using the above-mentioned undisturbed soil shear wave velocity testing equipment around the pile for monitoring, including the following steps:

[0065] Step 1: Install and debug equipment,

[0066] Assemble and debug the undisturbed soil shear wave velocity test equipment, determine the excitation signal, frequency and propagation distance, and test whether the undisturbed soil shear wave velocity test equipment and 5G signal transmission can work normally;

[0067] Step 2: Determine the location of the measuring point,

[0068] The soil around the wind turbine pile was tested, and the change of soil stiffness within the range of 4 times the pile diameter was considered in the horizontal direction, and the measuring points were arranged with the pile diameter D as the interval, and one measuring point was arranged in the free field as a control; each The measuring p...

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Abstract

The invention relates to an in-situ monitoring method, a testing system and testing equipment for the rigidity of soil around a pile. The monitoring method comprises the following steps: testing the soil around the pile of a fan, emphatically considering the rigidity change of the soil within the range of 4 times of the pile diameter in the horizontal direction, arranging measuring points by taking the pile diameter D as a distance, and meanwhile, arranging one measuring point as a contrast in a free field; each measuring point being arranged in the pile burial depth direction, vertical measuring points being arranged according to the characteristics of an initial measured foundation soil body, and at least two vertical measuring points being arranged on each layer of soil body; performing in-situ test on the rigidity of soil around the fan pile once a week, and recording the collection date during each test; the undisturbed soil shear wave velocity testing equipment generating related data during working, and processing on-site data of testing points around a pile to obtain a three-dimensional space-time model of the rigidity of soil around the pile. According to the monitoring method, three-dimensional space-time monitoring of the rigidity of the soil body around the fan pile is achieved for the first time, and structural and dynamic characteristic changes of the soil body within the influence range around the fan pile in a three-dimensional space are obtained.

Description

technical field [0001] The invention relates to an in-situ monitoring method, a testing system and testing equipment for the stiffness of soil around a pile. The testing equipment is undisturbed soil shear wave velocity testing equipment. Background technique [0002] Deep Quaternary lagoon facies, littoral and other marine sedimentary soft soil layers are widely distributed in the coastal areas of my country, mainly consisting of muddy clay and muddy silt (silt) interlayers. Due to the difference in geographical location and geological origin, the microstructure and structural properties of soft soil in different regions are different, but they all have the characteristics of high water content, large void ratio, low strength, high compressibility coefficient and sensitivity. [0003] Usually, in order to simplify the calculation, the soil around the pile is often simplified as a homogeneous medium when analyzing the pile-soil interaction. However, due to the nonlinear chan...

Claims

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Application Information

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IPC IPC(8): G01N29/04G01N29/07G01S19/42G08C17/02
CPCG01N29/043G01N29/07G01S19/42G08C17/02Y02E10/727
Inventor 王雪菲董徐平李家乐李德明
Owner HEBEI UNIV OF TECH
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