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论文中文题名:

 陡坡岩壁快速覆绿技术试验    

姓名:

 杜睿智    

学号:

 201511573    

学科代码:

 081803    

学科名称:

 地质工程    

学生类型:

 硕士    

学位年度:

 2018    

院系:

 地质与环境学院    

专业:

 地质工程    

第一导师姓名:

 王念秦    

第一导师单位:

 西安科技大学地质与环境学院    

论文外文题名:

 Experiment of rapidly greening technology of steep rock slope    

论文中文关键词:

 硬质岩 ; 陡坡岩壁 ; 快速覆绿 ; 试验    

论文外文关键词:

 Hard rock ; Steep rock slope ; Rapidly greening ; Experiment    

论文中文摘要:
裸露陡坡岩壁分布广,美观性差,落石、掉块、崩塌等灾害普遍。消除这些不利现象,实现“秀美山川”理念,“陡坡快速覆绿”是有效措施之一。这里通过物理模型研制,规划模拟条件,开展模型试验,探索陡坡岩壁覆绿技术。得到了一些有价值的结果、结论,主要包括: 1、坡度影响:试验共设计了50°、60°、70°三种坡度。在Ⅰ型刻槽、无基肥基质、基质含水率较低时,坡度为60°和70°的模型中植物平均高度h曲线相互纠缠,相差不大,但当坡度缓至50°时,其平均高度h比坡度为60°和70°时的平均值大11%到35%;在Ⅰ型刻槽、无基肥基质、基质含水率较高时,坡度的改变对植物平均高度影响不明显;在Ⅱ型刻槽、有基肥基质时,不管基质含水率高低,坡度的改变对植物平均高度影响都不明显。试验结果说明坡度在土层较薄、含水率较低和土壤肥力较弱时对植物生长有影响,缓坡更有利于植物生长发育。其产生影响主要是因为浇水后,土壤会受到水流的冲刷,从而将土壤颗粒和其中的营养物质带走,坡度越大,这种冲刷作用就越明显。而当土壤较厚或肥力较强时,冲刷作用就不太明显。 2、刻槽类型影响:试验共设计了Ⅰ型(基质厚3cm)和Ⅱ型(基质厚6cm)两种刻槽。在坡度为50°、60°和70°,有基肥基质时,不管基质含水率处于较低还是较高的水平,都是Ⅰ型刻槽模型中植物生长更快,比Ⅱ型刻槽模型中植物平均高度h大2%到172%。试验结果说明刻槽类型,即土层厚度对植物生长发育有影响作用,土层厚度较薄时(3cm左右)植物平均高度更大。其产生影响主要是因为在当前试验条件下,植物生长所必须的水分条件和养分条件是充足的,试验过程中植物在土层薄的模型中根系相对集中,更加容易吸收水分和养分,生长速度更快。 3、基质类型影响:试验共设计了有基肥基质和无基肥基质两种基质。在坡度为50°、60°和70°,Ⅰ型刻槽时,不管基质含水率处于较低还是较高的水平,植物平均高度h都是有基肥基质的模型中较高,比无基肥基质时高2%到34%。试验结果说明基质类型对植物生长发育有影响作用,有基肥时植物平均高度更大。 在试验结束后,对结果进行了分析和反思,提出了模型和试验方案的缺陷和改进计划,以期对未来的试验提供帮助。
论文外文摘要:
The exposed steep rock slopes are widely distributed and have poor aesthetic appearance. Falling stones, falling blocks and collapses are common. In order to eliminate these unfavorable phenomena and realize the "beautiful mountains and rivers" concept, "rapidly greening of steep rock slopes" is one of the effective measures. We developed the physical model, planned the simulation conditions, and conducted model tests to explore the steep slope greening technology. Obtained some valuable results and conclusions, mainly including: ①Gradient effect:Three gradients of 50°, 60°, and 70° were designed.When the conditions are type I groove, non-fertilizer stroma and the moisture content of the stroma is low, the average height h curves of the plants in the models with gradients of 60° and 70° are entangled with each other. However, when the gradient is reduced to 50°, the average height h is 11% to 35% larger than the average value when the gradients are 60° and 70°. When the conditions are type I groove, non-fertilizer stroma and the moisture content of the stroma is high, changes in gradient have little effect on average plant height. When the conditions are type Ⅱ groove and fertilizer stroma, regardless of the moisture content of the stroma, the change in gradient has no significant effect on the average height of the plant. The test results show that the slope has an effect on plant growth under certain conditions, and the gentle slope is more conducive to plant growth and development.The main reason for this is that after watering, the soil will be flushed by the water flow, which will take away the soil particles and the nutrients contained therein. The greater the slope, the more obvious this scouring action will be. ②Groove type effect:Two kinds of grooves were designed in the experiment, including Type I (3 cm in thickness) and Type II (6 cm in thickness).When the conditions are 50°, 60° and 70°gradients, fertilizer stroma, whether the moisture content of the stroma is low or high, plants grow faster in type Ⅰ groove. It’s average height h is 2% to 172% larger than that of the type Ⅱ groove model. The test results show that the type of groove, that is, the thickness of the soil has an effect on the growth and development of the plant. When the thickness of the soil is thin (about 3 cm), the average height of the plant is greater. Because under the current experimental conditions, the necessary water conditions and nutrient conditions for plant growth are sufficient, so during the test, the plant root system is relatively concentrated in the thin soil model, and it is easier to absorb water and nutrients, and the growth rate is faster. ③Stroma type effect: :Two kinds of stroma type were designed in the experiment, including stroma with fertilizer and stroma without fertilizer. When the conditions are 50°, 60° and 70°gradients, type Ⅰ groove, whether the moisture content of the stroma is low or high, the average height h of the plants is higher in the model with the fertilizer stroma, and it is 2% to 34% higher than that without fertilizer. The test results show that the stroma type has an effect on the growth and development of the plant, and the average height of the plants in the fertilizer stroma is greater. After the end of the experiment, the results were analyzed and introspected, and the defects and improvement plans of the model and test plan were proposed in order to provide assistance for future experiments.
中图分类号:

 X171.4    

开放日期:

 2018-06-21    

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