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Ejection-type T-shaped full-flow injection device

A catapult device and catapult-type technology, which is applied in the field of foundation soil survey, construction, infrastructure engineering, etc., can solve the problems of limited penetration depth and cannot simulate the stress state of underwater pipelines well, and improve the penetration Depth, improved stability and penetration point accuracy, good quality control effects

Active Publication Date: 2019-11-29
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are mainly two types of free-falling cone penetrometers and spherical penetrometers, but the current free-falling penetrometers have limited penetration depths and cannot well simulate the stress state of underwater pipelines

Method used

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  • Ejection-type T-shaped full-flow injection device
  • Ejection-type T-shaped full-flow injection device
  • Ejection-type T-shaped full-flow injection device

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Embodiment 1

[0044] The present invention provides an ejection-type T-shaped full-flow penetration device, which consists of three parts: the first part is an ejection device 1, including an ejection frame 1a, an elastic ring 1b, an ejection base 1c, an ejection slide tube 1d and an elastic force Sensor 1e; the second part is the missile-style empennage 2 that stabilizes the penetration direction of the penetrometer, and the tail is a four-page empennage 2a, with a coaxial cable 2b inside to transmit signals and data, and the coaxial cable 2b is connected to the internal digital-to-analog converter 2c, the lower top is a threaded joint 2d; the third part is a T-shaped full-flow probe 3, including a connecting rod 3a connected to the missile-style empennage 2, and the bottom of the connecting rod is equipped with an inclination angle sensor 3b, an acceleration sensor 3c and a pore pressure sensor 3d.

[0045] in:

[0046]The above-mentioned ejection-type T-shaped full-flow penetration devic...

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Abstract

The invention discloses an ejection-type T-shaped full-flow injection device. The ejection-type T-shaped full-flow injection device is composed of three parts, an ejection device (1) of the first partis located on the upper part, a missile-type empennage (2) of the second part is located in the middle, and a T-shaped full-flow probe (3) of the third part is located on the lower part. The ejectiondevice provides the initial kinetic energy of a T-shaped full-flow injection instrument, thus the injection depth of the injection instrument can be effectively increased, the stability of the injection instrument and the injection point precision can be improved through the four-blade missile-type empennage, an acceleration sensor, a force sensor and a tilt sensor are additionally arranged, andthrough a hole pressure sensor, the underwater in-situ test precision of the T-shaped full-flow injection instrument can be further improved. The ejection-type T-shaped full-flow injection device is used for underwater ultra-soft soil strength characteristic testing, has the advantages of being fast, economical, easy to operate, high in accuracy and the like, and is an extra powerful in-situ testtool for evaluating the strength characteristic of underwater ultra-soft soil.

Description

technical field [0001] The invention relates to an ejection-type T-shaped full-flow penetrating device, which is a particularly powerful in-situ testing tool for evaluating the strength of underwater ultra-soft soil, and belongs to the field of in-situ testing of geotechnical engineering. Background technique [0002] There are a large number of ultrasoft soils widely in coastal and lake depositional areas. This ultrasoft soil has a high water content (greater than 100%) and is in a fluid-plastic state. It has the characteristics of high compressibility, extremely low strength and high sensitivity, and has structural properties. , this type of ultra-soft soil can hardly be sampled and tested indoors, and it is difficult to evaluate its strength and deformation characteristics with existing survey and test techniques, and only in-situ test methods can be used. Including cross-plate shear test, CPTU static penetration test, spherical and T-shaped full-flow static penetration t...

Claims

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Application Information

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IPC IPC(8): E02D1/02
CPCE02D1/022
Inventor 乔欢欢蔡国军荣琦刘东明武猛
Owner SOUTHEAST UNIV
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