Remolded soil sample preparation device capable of controlling density through weight and air pressure combined loading

Abstract

The invention discloses a remolded soil sample preparation device capable of controlling density through weight and air pressure combined loading. The remolded soil sample preparation device comprises an air pressure raising device part and a sample preparation tube part, wherein the sample preparation tube part comprises a vertically arranged sample tube; the top of the sample tube is connected with a weight through a pressure bar; the weight is arranged on a tray on the top of the pressure bar; the bottom of the pressure bar is provided with a pressing plate for pressing a soil sample in the sample tube; and the pressing plate extends into the sample tube. After weight loading is performed by using the device, pressurization is performed through an air compressor, so that the purpose of accurately controlling the density of a remolded soil sample is achieved, the sample preparation period is greatly shortened, and the remolded soil sample having a given water content or given density can be prepared according to requirements; the prepared soil sample is uniform, thereby greatly improving the reliability of experimental results; and instruments are used to realize quantitative control of the air pressure and the sample height, thereby greatly reducing various operation errors caused by artificial operation.

Description

technical field [0001] The invention belongs to the field of geotechnical tests in the discipline of geotechnical engineering, and in particular relates to a remodeling soil sample preparation device which controls density through combined loading of weights and air pressure. Background technique [0002] According to relevant geotechnical test regulations (SL237-1999, JTGE40-2007), the currently commonly used remolded soil sample preparation methods are divided into sample-striking method and sample-compression method. Among them, the sample-striking method is based on the volume of the sample preparation cylinder and the required dry density. Calculate the mass of the required wet soil, and pour it into the sample preparation cylinder, and compact the soil sample in one layer or layers; the sample compression method is to calculate the required wet soil according to the volume of the sample compactor and the required dry density The quality of the wet soil sample is poured...

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Problems solved by technology

[0004] In order to solve the above problems, the present invention provides a remolded soil sample preparation device that controls the density through combined loading of weights and air pressure, and accurately controls the moisture content of the remolded soil sample through two loading methods, thereby solving the problem of existing The problem of uneven density and holes in the remolded soil sample existed in the technology, and finally reached the predetermined goal of remodeling the dry density of the soil sample

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