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土工格栅加固道路软基的试验研究 被引量:6
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作者 胡幼常 《岩土力学》 EI CSCD 1996年第2期76-80,共5页
通过室内模型试验,对土工格栅加固道路软土地基的效果及机理进行了研究。除测出4种不同试验条件下基底压力与地基沉降的关系曲线外,还用读数显微镜精确观测了软土地基的位移场,并对试验结果作了初步分析,揭示了土工格栅能有效加固... 通过室内模型试验,对土工格栅加固道路软土地基的效果及机理进行了研究。除测出4种不同试验条件下基底压力与地基沉降的关系曲线外,还用读数显微镜精确观测了软土地基的位移场,并对试验结果作了初步分析,揭示了土工格栅能有效加固道路软基的某些机理。 展开更多
关键词 土工格栅 模型试验 板土地基 处理
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Vertical drainage capacity of new electrical drainage board on improvement of super soft clayey ground 被引量:1
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作者 沈扬 励彦德 +2 位作者 黄文君 徐海东 胡品飞 《Journal of Central South University》 SCIE EI CAS CSCD 2015年第10期4027-4034,共8页
As an advanced polymer composites electro-kinetic geosynthetics, the electro-osmotic vertical drainage(EVD) board could drain water quickly and accelerate consolidation process. However, the drainage rate was mainly i... As an advanced polymer composites electro-kinetic geosynthetics, the electro-osmotic vertical drainage(EVD) board could drain water quickly and accelerate consolidation process. However, the drainage rate was mainly impacted by the vertical drainage capability. Therefore, vertical drainage capability at the top of EVD board was theoretically analyzed. Basic requirements for drainage at the top of the board were summed up, as well as the formula of anode pore pressure when losing the vertical drainage capability. Meanwhile, a contrast test on the top and bottom drainage capacities was conducted. In use of the advanced EVD board, the voltage potential and pore pressure of anode were measured. Moreover, the derived formulas were verified. The result shows that the decrease of electric force gradient had an observable impact on the drainage capability. There was nearly no difference between the energy consumption for the two drainage methods. Although a little less water was discharged, the top drainage method had more advantages, such as high initial drainage velocity, few soil cracks, low anode water content and high soil strength. All of these show that the super soft soil ground could be consolidated quickly in use of the advanced EVD board through the top drainage. The top drainage method could efficiently improve the drainage effect, decrease the energy consumption and speed up the project proceeding. 展开更多
关键词 electro-osmotic vertical drainage(EVD) board vertical drainage capacity potential gradient pore pressure around anode
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Impacts of Soil Additives on Crop Yield and C-Sequestration in Post Mine Substrates of Lusatia,Germany 被引量:6
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作者 A.RODIONOV S.NII-ANNANG +5 位作者 O.BENS M.TRIMBORN S.SCHILLEM B.U.SCHNEIDER T.RAAB R.F.HTTL 《Pedosphere》 SCIE CAS CSCD 2012年第3期343-350,共8页
Opencast lignite mining in the Lusatia region of Germany has resulted in large scale landscape disturbances, which require suitable recultivation techniques in order to promote plant growth and establishment in the re... Opencast lignite mining in the Lusatia region of Germany has resulted in large scale landscape disturbances, which require suitable recultivation techniques in order to promote plant growth and establishment in the remaining nutrient-poor substrates with low water-holding capacity. Thus, the effects of two commercial soil additives (CSA), a hydrophilic polymer mixed with volcanic rock flour and bentonite (a-CSA), and digester solids from biogas plants enriched with humic acids and bentonite (b-CSA), on soil organic carbon (SOC) storage, plant yields and root biomass were assessed after cultivating perennial crops (Dactylis 9lornerata L.) in monoculture and Helianthus annuus L.-Brassica napus L. in crop rotation systems. The CSA were incorporated into the top 20 cm soil depth using a rotary spader. The results indicated that a-CSA led to a significant increase in plant yield during the first year, and improved root biomass in the following year. As a result, SOC stocks increased, especially in the 0 10 cm soil layer. No significant sequestration of additional SOC was observed on b-CSA-amended plots at the end of both years. Bulk density values decreased in all treatments under the monoculture system. It can be concluded that application of a-CSA enhanced soil water availability for plant uptake and consequently promoted plant growth and organic carbon sequestration. The relative enrichment of organic matter without effects on water-holding capacities of b-CSA treatments suggested that it was not suitable for rapid land reclamation. 展开更多
关键词 bulk density organic C inputs POLYACRYLATE soil organic carbon water-holding capacity
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