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In-situ small disturbance soil sampler for indoor silt settling column test

A soil borrower and settling column technology, which is applied to the field of in-situ small-disturbance soil borrowers for indoor sludge settling column tests, can solve the problems of large soil sample disturbance and influence on test results, etc. The effect of final test accuracy

Inactive Publication Date: 2010-09-22
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantage of the "direct method" is that it disturbs the soil sample greatly, which seriously affects the test results.

Method used

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  • In-situ small disturbance soil sampler for indoor silt settling column test
  • In-situ small disturbance soil sampler for indoor silt settling column test
  • In-situ small disturbance soil sampler for indoor silt settling column test

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Embodiment Construction

[0021] Combined with the accompanying drawings of the manual, the in-situ small disturbance soil fetcher for the indoor silt settlement column test is further explained:

[0022] In situ small disturbance soil fetcher for indoor silt settlement column test is mainly composed of three parts: thin-walled ring knife string 1 for soil fetching at the bottom, metal handle 2 at the top, and built-in stopper 3 . Its production process and soil extraction process are as follows:

[0023] (1) Thin-wall ring knife string 1 and metal handle 2 are made of the same size stainless steel material. The inner diameter of a single ring knife is 18mm, the wall thickness is 0.5mm, and the height is 10mm; the length of the metal handle is 1100mm, the inner diameter is 18mm, and the wall thickness is 0.5mm. A single thin-walled ring knife is numbered and weighed separately, and then fixed in series with solid plastic rods of the same diameter. The outer heat-shrinkable tube 7 is heated and shrunk t...

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Abstract

The invention discloses an in-situ small disturbance soil sampler for an indoor silt settling column test, which mainly comprises a thin-wall cutting ring series, a metal handle, a fixed plastic bar, an external covering heat-shrinkable tube, an adjusting fixing bolt and a built-in blocking plug, wherein the thin-wall cutting ring series is formed by fixedly connecting a plurality of single cutting rings in series by a solid plastic bar; then the heat-shrinkable tube is covered outside the cutting ring series; after the heat-shrinkable tube is cooled and shrunk to clamp the cutting ring series, the plastic bar is pulled out; the thin-wall cutting ring series is fixedly connected with the metal handle through the heat-shrinkable tube; the built-in blocking plug is positioned in the metal handle and comprises a long and thin metal bar and a bottom metal disc; round air discharging holes are symmetrically arranged on the bottom metal disc for discharging air in the cutting ring cavity; screw thread is arranged at the upper part of the thin metal bar for penetrating through a screw hole in the center of the adjusting fixing bolt; and the adjusting fixing bolt is arranged at the top part of the metal handle. The device can be applied to sampling operation of settling soft soil in a depth direction in an indoor test or field test, and the soil sampling device has small volume, convenient operation, small disturbance of soil samples and accurate results, and is particularly suitable for the sampling test operation of the settling soil sample in the indoor silt settling column test.

Description

technical field [0001] The invention belongs to the intersecting technical field of basic geotechnical engineering tests and environmental engineering tests, and in particular relates to an in-situ small-disturbance soil fetcher for indoor silt settlement column tests. Background technique [0002] Settlement column test is an important test device to study the sedimentation and self-weight consolidation of river, lake and marine silt. The existing test device can be used to measure the self-weight consolidation coefficient c of settled silt and soil mud at different concentrations v . The results of the settlement column test also provide basic engineering parameters for the current dredging and widening of river channels, port dredging and treatment projects, lake dredging and pollution control projects, etc., and provide necessary technical support for engineering treatment plans and design ideas through indoor settlement column tests . At the same time, the research on...

Claims

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Application Information

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IPC IPC(8): G01N1/08
Inventor 张福海郭帅杰张磊孟庆祥石永超
Owner HOHAI UNIV
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