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Soil material with high unconfined compressive strength

A technology of compressive strength and soil materials, applied in the directions of organic fertilizers, soil conditioning materials, fertilizer mixtures, etc., can solve the problems of unclear effect of modification effect of soil sample water content nanomaterials content, unclear reinforcement mechanism, etc. Achieve the effect of increasing unconfined compressive strength and improving engineering properties

Active Publication Date: 2014-03-26
HOHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, there are relatively few research results on the use of nanomaterials to improve soil strength, and even less research on soil modification by nano-oxides, and the reinforcement mechanism is still unclear. The impact of the modification effect is not yet clear, so it is particularly important to carry out research on soil modification with nanomaterials

Method used

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  • Soil material with high unconfined compressive strength
  • Soil material with high unconfined compressive strength
  • Soil material with high unconfined compressive strength

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Mixed soil preparation, take the preparation of 150g mixed soil material as an example. The preparation steps of mixed soil material are as follows: (1) the quality of dry soil is 144g, and the quality that takes by weighing required NA is 6g in the ratio of 4% by NA dosage; The optimal water content obtained in the light compaction test in the Regulations is 16%. Add 150gx0.16=24g of water to the mixed soil, mix well to prevent the formation of lumps, and leave it in a humidifier for 24 hours to obtain NA Modified soil mix.

[0043] The test procedure for the prepared mixed soil is as follows:

[0044] The first step is to prepare a cylindrical test sample by pressing the sample. The sample is 80mm high and the cross-sectional diameter is 39.1mm. After the sample is formed, it is sealed with a plastic film and placed in a normal temperature curing box ((20±1)°C, ( 96±2)% relative humidity) curing for 7 days;

[0045] In the second step, put the sample into the satur...

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Abstract

The invention discloses a soil material with high unconfined compressive strength. The soil material comprises composite soil and water. The weight of the water accounts for 8.2%-18.8% of the composite soil. The composite soil comprises, by mass, 1-6% of nanometer aluminum oxide and 94-99% of dry soil. Due to the fact that the dry soil is mixed with a certain mass of nanometer aluminum oxide, the engineering property of the soil is effectively improved, and the unconfined compressive strength of the soil material is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering, and in particular relates to a soil material with high unconfined compressive strength. Background technique [0002] So far, the methods to improve the strength of soil mainly include: compaction method, physical enhancement method, chemical enhancement method, and biological enhancement method. [0003] (1) The compaction method is to compact the soil to the required density. The compaction method is low in cost, but has certain trial limitations, and it is difficult to meet the needs of large-scale projects for foundation strength. [0004] (2) The physical improvement method includes pile foundation, soil nailing wall, adding geotextile and adding sand and gravel to the soil to change the gradation of the soil. The physical lifting method is simple in construction, but the construction conditions and trial range are limited. [0005] (3) The chemical improvement method is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/12C09K17/08
Inventor 高磊余湘娟周斌陈晖东周秋月
Owner HOHAI UNIV
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