共查询到20条相似文献,搜索用时 78 毫秒
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通过粉喷桩加固技术成功运用于水力冲填形成粉煤灰场地地基处理工程,并在成桩后进行载荷试验,试验结果表明粉煤灰场地地基处理用水泥粉喷桩加固是可行的。 相似文献
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PENG Tian-sheng 《电网与水力发电进展》2007,(4)
由刚性桩、水泥土搅拌桩及桩问土组成的复合地基,其承载力是由桩和桩间土共同分担的,通过刚性桩和水泥土搅拌桩的施工,实现对桩间土的挤密加固,可充分发挥和利用地基土的承栽潜力,有效地解决软土地基承栽力不足的问题。 相似文献
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深层搅拌水泥防渗墙是长江重要堤防隐蔽工程 ,荆南长江干堤加固工程中采用的施工方法。主要施工机械设备采用单轴、多轴深层搅拌机。文中介绍先导孔、防渗墙、检查孔的施工 ,并就在施工遇到的特殊情况进行了简要性论述。 相似文献
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为满足实际工程评价中对点值权重和非点值权重的不同需求,通过统计分析41份专家权重打分调查问卷,建立了用于病险水闸除险加固效果评价的点值权重、区间权重和云模型权重。结果表明,病险水闸安全鉴定结论准确性、除险加固设计方案、服役性能提升程度、经济效益和可持续发展效应5个一级评价指标的点值权重分别为0.23、0.24、0.21、0.15、0.17;二级评价指标中,安全鉴定前期资料的可靠性和设计方案对恢复水闸设计功能的有效性对除险加固效果的影响最大,而7种服役性能指标在除险加固中具有同等重要性。 相似文献
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为合理评估病险水库除险加固治理效果,针对病险水库除险加固特点,分别从除险加固设计与施工方案、除险加固效果、除险加固综合影响3方面选取28个影响因素,建立评价指标体系,应用改进的层次分析法,采用三标度作为各层次评价指标的比率标度建立比较矩阵,确定各评价指标的权重,进而建立各评价指标的隶属度矩阵,构建模糊综合评价模型。对湖北省某病险水库除险加固效果评价结果表明,评价结果与实际情况吻合,模型具有可行性。 相似文献
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The laboratory LAMTI has worked for several years on the study and the optimization of the thermalperformances of passive solar walls like solar Trombe wall.These components of the buildings envelope havevery complex behaviour because they are the seat of various coupled heat transfers modes and are subjected to therandom variations of the meteorological parameters.Using the finite difference method(FDM)and starting fromexperimental results recorded during several years,a simulation model was developed and validated concerningthe"composite"Trombe wall.In order to make this work more accessible to the community of the heat engineers,it appears interesting to build a simulation model which can be integrated into the library of elements of theTRNSYS software.A"Type"was thus carried out and the results obtained compared with those of the FDMmodel.In this work we compare the obtained results with these two numerical ways.The assumptions and theresults of simulations are also confronted with those of an existing module in TRNSYS(Type 36)established forthe"classical"Trombe wall.The study shows that the models that we developed are very precise and that certainassumptions must be used with a lot of precautions.The advantages of the composite Trombe solar wallcompared to the Classical Trombe wall are highlighted for cold and/or cloudy climates. 相似文献
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对垂直管圈和螺旋管圈水冷套进行了结构形式、结构特点和设计事项归纳总结.并重点介绍了垂直管圈四角切圆水冷套与螺旋管圈单隔墙水冷套设计注意事项.通过对垂直管圈和螺旋管圈水冷套的结构形式和结构特点的对比,从设计和制造角度进行了分析,不同锅炉形式,不同燃烧器布置需要的水冷套结构也不同. 相似文献
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DU Li-juan 《电网与水力发电进展》2007,(4)
杨庄河炼化项目厂区堤防断面设计中,从厂区自身要求对坡式护岸和墙式护岸进行了初步的方案比较,又从墙体稳定和基底应力对墙式护岸中衡重式挡土墙、仰斜式挡土墙两种形式进行比较。 相似文献
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岩壁吊车梁壁座的开挖成型是整个岩壁梁施工的关键。为此,岩壁梁壁座的开挖施工经过了反复的试验取证和参数的优化调整,尤其在厂房f25断层裂隙密集、岩体破碎的条件下,壁座能够得以完好的保留,为后期混凝土的施工和梁体的受力奠定了基础。 相似文献
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指出原标准中个别名称、公式、算法上存在的问题,提出修改建议,并详细分析和阐明了建议修改的理由。 相似文献
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The thermal properties of the layers of a wall, whether or not exposed to solar radiation, are calculated provided that the boundary conditions and some values of the transient temperature field within the wall are known. The developed procedure is based on the adjoint-solution technique and is applicable both to walls in operation and to the design of walls that are required to meet certain temperature specifications. In the former case, temperature measurements are needed. Theoretical and experimental tests have proved the accuracy of the method. Applications may be found in energy management and thermal storage in buildings, in the improvement of passive systems and in the design of multilayer slabs forming parts of heat-transfer equipment. © 1997 by John Wiley & Sons, Ltd. 相似文献
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A modified form of Trombe Wall in which the glazing has been replaced by weather resistance material has been proposed and examined for winter heating and summer cooling in mixed climate conditions characterized by a mild winter and a relatively harsh dry summer. The experimental results indicate the potential applications of such a wall, known as Vary-Therm Wall, in solar passive building architecture for mixed climatic conditions. 相似文献
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