A kind of structural soil with high liquid limit and large pores and sample preparation method thereof
A structural, large-pore technology, applied in the field of civil engineering, can solve problems such as soil sample structure disturbance, and achieve the effect of a simple and controllable sample method
Active Publication Date: 2022-02-11
XIANGTAN UNIV
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Problems solved by technology
[0005] Aiming at the problems existing in the prior art, the present invention proposes a simple, feasible and effective artificial preparation of high liquid limit structural soil, which can solve the problem of disturbing the soil sample structure caused by taking soil on site, and better control the test results. The homogeneity of the sample and the rapid preparation of high liquid limit and large pore structural soil, so that people can better test the structural characteristics of natural structural soft clay, especially the natural soil in marine or lacustrine depositional areas Research
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Embodiment Construction
[0071] The technical solution of the present invention is illustrated below, and the protection scope of the present invention includes but not limited to the following examples.
[0072] A sample preparation method of high liquid limit large pore structural soil, the method comprises the following steps:
[0073] 1) Component detection: detect the plastic limit moisture content, liquid limit moisture content and specific gravity of the base soil, kaolin, diatomite, and calcium-based bentonite, and simultaneously detect the specific gravity of the cement.
[0074] 2) Mixing: According to the detection of components, base soil, kaolin, diatomite, calcium-based bentonite, cement and urea are mixed, and the mixed material is obtained after stirring evenly.
[0075] 3) Sample preparation: Pour the mixture into a sample preparation device and compact it to obtain a sample.
[0076] 4) Curing: put the sample into the container, first vacuumize, then carry out water injection curing...
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Abstract
The invention discloses a high liquid limit and large pore structural soil and a preparation method thereof. The structural soil is prepared by using base soil, kaolin, diatomite, calcium-based bentonite, cement and urea as raw materials, and then preparing the soil in a special proportion. Mixed and compacted, and finally prepared after water injection curing and constant temperature curing. The invention provides a simple, feasible and effective solution for artificial preparation of structural soil, which can solve the problem of soil sample structure disturbance caused by soil sampling on site, better control the uniformity of the sample, and rapidly prepare high liquid limit and large liquid limit. Porous structured soils. The present invention simulates natural high liquid limit by adding early-strength cement to the raw soil to form chemical cementation, adding diatomite and calcium bentonite to improve the liquid limit, and adding different mass percentages of urea particles to form large pores after hydration Porous structured soils.
Description
technical field [0001] The invention relates to a geotechnical engineering research method, in particular to an artificial structural soil simulating natural undisturbed soil bonding and high liquid limit and large pore characteristics and a sample preparation method thereof, belonging to the field of civil engineering. Background technique [0002] With the rapid development of my country's economy and the rapid advancement of urbanization, various domestic engineering construction projects are increasing, such as: industrial and civil buildings, roads and bridges, underground engineering, water conservancy facilities, port engineering, etc. Especially in the economically developed eastern and southern coastal areas, where soft clay strata are widely distributed, limited by geographical conditions and land resources, more construction projects are carried out in soft clay foundation environments. Natural soft clay generally has the characteristics of high water content, lar...
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IPC IPC(8): C04B28/02C04B111/40
CPCC04B28/02C04B2111/40C04B18/0418C04B14/106C04B14/08C04B14/104C04B24/126C04B38/04
Inventor 王智超彭慧良郑军星熊赟
Owner XIANGTAN UNIV