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排序方式: 共有127条查询结果,搜索用时 15 毫秒
91.
关于土壤渗滤技术在净化高速公路附属区污水的应用探讨 总被引:1,自引:0,他引:1
根据高速公路沿线环境条件及附属区污水水质特点,利用土壤渗滤技术处理高速公路附属区生活污水.研究结果表明,该技术在高速公路污水处理中具有处理效果好、水质稳定、处理水可进行中水回用等优点,具有很好的应用推广前景,能取得较好的社会效益和经济效益. 相似文献
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孙东 《辽宁省交通高等专科学校学报》2012,14(1):17-19
本文通过对新铁高速公路软土区的地质情况和特点的分析,确定采用碎石挤密桩来加固软土地基。由碎石桩设计、施工过程、工艺控制、质量检查等进行详细的阐述;施工后通过对桩基、装间土和复合地基承载力的检测试验,证明该处高速公路碎石桩能够满足地基处理的要求。 相似文献
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为解决辽宁沿海产业地区及周围地区软土路基处理问题,提出了路基开槽填筑灰土山皮石和底层戗灰+山皮石填筑这两种处理方案加固软土路基土,该处理方法能保证路基的长期稳定性和耐久性. 相似文献
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This research studied and compared different construction techniques for the road subgrade, embankment and pavement of different types of roundabout intersections in order to assess their environmental sustainability. A Life Cycle Assessment (LCA) was carried out on double lane, turbo- and flower roundabouts.We considered virgin materials and reclaimed asphalt pavement (RAP) for the pavement construction. Also the environmental effects due to in situ lime stabilization of fine-grained soils were assessed in order to reduce the use of virgin material in road subgrades.The use of reclaimed asphalt pavement (RAP) can lead to a significant reduction in pollutant emissions and energy consumption (especially due to the lesser material transport) – though with a slightly different impact according to the different percentages employed – compared to the pavements constructed with virgin materials. The same consideration can be made for fine soils with in situ lime stabilization: on the one hand, the technique allows to improve significantly the mechanical properties of soils which would be otherwise dumped and, on the other, to provide considerable environmental benefits. The life cycle assessment of the pavement was carried out with the help of the PaLATE software (by comparing different maintenance scenarios) while emissions and energy consumption in the use phase at intersections were evaluated by means of closed-form models (to estimate vehicle delays and speeds of vehicles) and the COPERT software.Finally, the generalized costs covered in the whole life cycle of roundabouts (i.e. sum of construction, maintenance and environmental costs) were assessed and associated to the different construction options. 相似文献
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Today, an important challenge for offshore wind energy is to design efficient and reliable offshore wind turbines (OWTs). The overall damping of OWTs plays an important role in the design process as it limits the amplitude of the OWT dynamic response at frequencies near resonance. Therefore, an accurate estimation of OWTs damping is necessary for the efficient design of these systems. The foundation damping is one of the main sources overall turbine damping and is the least well understood. This paper presents a critical review of recently published studies on foundation damping for OWTs on monopiles and explains how soil damping contributes to the total damping of OWTs. It also reviews the main methods that have been used for the estimation of foundation damping in numerical and experimental studies. In addition, the importance of damping to the OWTs fatigue life is discussed. Finally, a discussion is provided on the challenges to be overcome and recommendations for the accurate estimation of foundation damping. 相似文献
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深基坑支护设计,不仅要保证基坑内的正常作业,而且要防止基坑及坑外土体的移动,确保基坑附近建筑物、道路、管线等的正常使用.因此,深基坑围护结构的安全性显得尤为重要.在众多围护方法中,SMW工法(型钢水泥土搅拌墙)以其适用性强、围护成本低、施工周期短而倍受关注.文章结合工程实践,对大直径SMW工法在软土地基深基坑支护中的支护结构设计及施工要点及难点进行了分析和探讨. 相似文献
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土工合成材料试验指标值与它应用效果密切相关。指标值需要应用决策分析的方法最终确定。而粗集理论则能为它提供一种较好的决策分析方法,对日前试验指标值间进行相关或比较及一致性程度的统计分析时,要先考察其来源和试验数据的再现性是否符合要求。 相似文献