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Method for ground seepage-proofing and induration of polluted soil working-storage section in field restoration

A technology for site remediation and contaminated soil, applied in the field of contaminated soil remediation engineering, can solve the problems of short construction period, large capital investment, unnecessary and other problems of contaminated site remediation, and achieve the effect of shortening the engineering period, saving engineering costs, and high compressive strength

Active Publication Date: 2014-07-23
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are two commonly used ground laying methods: concrete floor laying and landfill anti-seepage cushion laying. The restoration period is generally relatively short. If the ground laying work is carried out according to these two methods, it will not only increase the additional engineering volume, but also require a relatively large capital investment. At the same time, the contaminated site will also face complex crushing work after the completion of the restoration. Therefore, the short-term In terms of contaminated site remediation projects, it seems unnecessary

Method used

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  • Method for ground seepage-proofing and induration of polluted soil working-storage section in field restoration
  • Method for ground seepage-proofing and induration of polluted soil working-storage section in field restoration
  • Method for ground seepage-proofing and induration of polluted soil working-storage section in field restoration

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Embodiment 1

[0018] The materials required in the embodiment mainly include lime, fly ash, bentonite and clay, and the materials are processed according to the following steps.

[0019] Step 1: Prepare the mixed soil;

[0020] Mix lime, fly ash, bentonite and clay evenly according to the following mass ratio:

[0021]

[0022] Step 2: Refer to the "Standards for Geotechnical Test Methods" (GB / T50123-199) for sample preparation and maintenance, specifically: add water to the mixed soil and stir evenly with a slurry mixer to make the mixed soil cement; The cemented soil is placed in a 40×40×160mm cement mortar sand triple test mold, and then the test mold is placed on a vibratory compactor to vibrate and leveled, and then the test mold is placed in a press for pressure treatment. The pressure is converted from the pressure of a 12-ton double-steel wheel vibratory roller commonly used in simulation engineering; the pressurized test mold is left at room temperature for one day, and then th...

Embodiment 2

[0027] The materials required in the embodiment mainly include lime, fly ash, clay and bentonite, and the materials are processed according to the following steps.

[0028] Step 1: Prepare the mixed soil;

[0029] Mix lime, fly ash, clay and bentonite uniformly according to the following mass ratio:

[0030]

[0031] Step 2: Refer to the "Standards for Geotechnical Test Methods" (GB / T50123-199) for sample preparation and maintenance, specifically: add water to the mixed soil and stir evenly with a slurry mixer to make the mixed soil cement; The cemented soil is placed in a 40×40×160mm cement mortar sand triple test mold, and then the test mold is placed on a vibratory compactor to vibrate and leveled, and then the test mold is placed in a press for pressure treatment. The pressure is converted from the pressure of a 12-ton double-steel wheel vibratory roller commonly used in simulation engineering; the pressurized test mold is left at room temperature for one day, and then...

Embodiment 3

[0036] The materials required in the embodiment mainly include lime, fly ash, clay and bentonite, and the materials are processed according to the following steps.

[0037] Step 1: preparing the mixed soil;

[0038] Mix lime, fly ash, clay and bentonite uniformly according to the following mass ratio:

[0039]

[0040] Step 2: Refer to the "Standards for Geotechnical Test Methods" (GB / T50123-199) for sample preparation and maintenance, specifically: add water to the mixed soil and stir evenly with a slurry mixer to make the mixed soil cement; The cemented soil is placed in a 40×40×160mm cement mortar sand triple test mold, and then the test mold is placed on a vibratory compactor to vibrate and leveled, and then the test mold is placed in a press for pressure treatment. The pressure is converted from the pressure of a 12-ton double-steel wheel vibratory roller commonly used in simulation engineering; the pressurized test mold is left at room temperature for one day, and th...

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Abstract

The invention discloses a method for ground seepage-proofing and induration of a polluted soil working-storage section in field restoration. The method provided by the invention comprises the following steps of step 1, preparing a mixed soil body, wherein a mixed soil body ingredient comprises four materials, namely lime, coal ash, clay and bentonite, and the lime, the coal ash, the clay and the bentonite are uniformly mixed according to the mass ratio of: 10%-15% of the lime, 40%-45% of the coal ash, 15%-20% of the bentonite and 35%-45% of the clay; and step2, adding water in the mixed soil body, uniformly stirring the mixed soil body through a neat paste stirring instrument, placing the mixed soil body after stirring into a test module, compacting the mixed soil body in the test module through a vibrating compacting instrument, the after the compaction is finished, stewing and conserving the mixed soil body to congeal so as to obtain a solidified body. The method provided by the invention has the advantages that the cost is low, the economic benefits are high, meanwhile, a waste utilization ecological benefit is realized, and the method is very suitable for induration and seepage-proofing of a polluted soil working-storage section in polluted soil field restoration with the high requirement on the period.

Description

technical field [0001] The invention belongs to the field of contaminated soil remediation engineering, and in particular relates to a ground seepage prevention and hardening method in a polluted soil temporary storage area in site remediation. Background technique [0002] In recent years, with the rapid development of my country's economy and the acceleration of urbanization, urban construction has continued to expand and the industrial structure has been continuously adjusted. Many enterprises located in urban areas, such as chemical plants, steel plants, metal smelting, and electroplating plants, have gradually closed Stopped and implemented the relocation work from the city to the outer suburbs. Due to the outdated equipment of these enterprises and the imperfect discharge technology of industrial "three wastes", a large amount of toxic and harmful heavy metals and other pollutants have entered the foundation soil and groundwater, resulting in the original site of the en...

Claims

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Application Information

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IPC IPC(8): B09C1/00
Inventor 施积炎王毅何俊昱吴小东冯佳蓓
Owner ZHEJIANG UNIV