On-site discriminator of clay plasticity and its on-site discriminant method
A technology of cohesive soil and plasticity, which is applied in the field of foundation soil survey, construction, and basic structure engineering, etc., can solve problems such as stratification errors, real soil conditions that cannot be reflected in penetration holes, and inaccurate judgments, etc., to achieve The effect of complete functions, simple structure and strong operability
Active Publication Date: 2016-06-22
CHINA RAILWAY SHANGHAI DESIGN INST GRP
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Problems solved by technology
Because each person's feeling is different, it often leads to inaccurate judgment, which in turn leads to the phenomenon of stratification error.
At present, the plasticity state of the soil can be judged by the penetration test to measure the mechanical properties of the soil, but the penetration holes of the penetration test need to be spaced at least 3m according to the technical specification, so the real situation of the soil on site cannot be obtained from the specific location. penetrating hole manifested
Method used
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[0022] Example: such as figure 1 As shown, the cohesive soil plasticity field discriminator in this embodiment includes a casing 1, and an air bag 2 is arranged inside the cavity of the casing 1, and the inner cavity of the casing 1 is the same size as the air bag 2 in a natural state. The upper part of the airbag 2 respectively passes through the casing 1 and communicates with the pressure gauge 3 and the inflatable bag 4, wherein the pressure gauge 3 is used to detect and display the air pressure inside the airbag 2, and the inflatable bag 4 is used to inflate the airbag 2 and adjust the inner pressure of the airbag 2. air pressure. A valve 5 for controlling the communication state between the airbag 2 and the inflatable bag 4 is arranged between the airbag 2 and the inflatable bag 4; when the airbag 2 needs to be inflated, the valve 5 is opened, and when the discriminator is used, the valve 5 is closed. The bottom of the airbag 2 is connected with a probe 6 , and the probe...
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The invention relates to the field of rock and soil exploration, in particular to a cohesive soil plasticity field judging instrument and a field judging method thereof. The cohesive soil plasticity field judging instrument and the field judging method thereof are characterized in that the judging instrument comprises a protection cylinder, an air bag is arranged in a cavity of the protection cylinder, the top of the air bag is connected with an inflation device communicated with the interior of the air bag, a probe is arranged at the bottom of the air bag, the probe is connected and fixed to the outer surface of the bottom of the air bag, an air outlet hole is formed in the air bag, the air outlet hole is communicated with one end of a U-shaped pipe, the other end of the U-shaped pipe is provided with a sealing cap, a plurality of reference lines representing the cohesive soil plasticity are divided on the surface of the outer wall of the end, provided with the sealing cap, of the U-shaped pipe, and a certain solution is poured in the U-shaped pipe. The cohesive soil plasticity field judging instrument and the field judging method thereof have the advantages that the plasticity of cohesive soil can be rapidly and correctly judged, and the cohesive soil plasticity field judging instrument is simple in structure, high in operability, complete in function and the like.
Description
technical field [0001] The invention relates to the field of rock and soil exploration, in particular to an on-site discriminator of clay plasticity and an on-site discriminant method thereof. Background technique [0002] With the rapid development of municipal and national railway construction such as high-speed rail, subway, industrial and civil construction, and water conservancy construction, the level of engineering technology is improving day by day. Geotechnical engineering investigation and design is an important prerequisite for further design and construction of various projects. At this stage, the designer will provide the structural designer with an engineering geological profile that can truly reflect the stratification of the soil on site based on the survey data, and provide the physical and mechanical properties and engineering characteristics of each stratified soil. The structural designer will carry out further structural parameter design according to th...
Claims
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IPC IPC(8): E02D1/00
CPCE02D1/025
Inventor 雷文郑晓慧王其合陈曦林
Owner CHINA RAILWAY SHANGHAI DESIGN INST GRP