共查询到20条相似文献,搜索用时 9 毫秒
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基于极限平衡法建立了以工程造价为目标的土钉支护结构优化设计模型,采用改进复形法求解,并通过优化后分析进一步揭示了模型参数变化对优化问题的影响。该方法已编制成计算机设计软件,实际工程应用证明是成功的。 相似文献
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介绍了高密度电法的原理及测试方法,并结合在冲洪积地层勘察中的应用,比较分析,其结果与地质资料吻合较好,影像图件直观清晰,定性定量解释可靠,为推广应用高密度电法奠定了基础。 相似文献
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《Energy and Buildings》1999,29(2):135-139
The present paper describes a method for the energy management of the central heating installations of residences and other buildings. In particular, it refers to the optimum exploitation of thermal inertia of the building with optimisation of the daily operation cycle of heating. The span and desired temperatures are defined by the user within some acceptable limits, whereas their sequence of alteration based on the desired interior temperature depends on the outdoor temperature. A microprocessor is used to analyse the readings of various sensors, placed at different points of the heating installation, and to control the overall system operation. 相似文献
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This paper examines the impact of a 33‐year plantation of Eucalyptus camaldulensis on an alluvial soil in Gaborone, south eastern Botswana, by comparing the soil under the plantation with similar soil under an adjoining native savanna woodland dominated by Acacia karoo. Soil clay content was significantly higher in the plantation soil in both the 0–10 cm and 10–20 cm layers. There were no significant differences between soil under the two ecosystems with respect to the levels of organic matter, exchangeable potassium and available phosphorus. Despite the higher clay contents of the plantation soil, exchangeable calcium and magnesium and pH were higher in soil under the native woodland. This suggests that E. camaldulensis immobilizes soil nutrients faster and that plantation nutrient cycles are less efficient than in the native Acacia woodland. Consequently, soil nutrient deficiency will limit plantation productivity after the first few rotations. It is important to adopt tree harvesting techniques that reduce drain on soil nutrients at the end of a plantation rotation. 相似文献
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土钉墙与喷锚的设计方法研究及安全性分析 总被引:1,自引:0,他引:1
从施工工艺、作用机理等方面对目前普遍应用于基坑支护中的喷锚支护和土钉墙进行分析研究,并通过工程实例,比较了喷锚支护和土钉墙在水平位移、安全性能等方面的差异.在场地狭小、变形位移要求较严格等情况下,采用喷锚支护安全可靠;在土质粘性好的情况下,采用土钉墙经济效益好,节省造价. 相似文献
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针对某水电枢纽库区一涵闸不能满足上部建筑承载力要求的问题,提出了采用水泥土换填法进行地基加固处理的方案,并对其设计计算过程、施工工艺及质量检验进行了介绍,以供类似工程参考。 相似文献
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结合工程实际,从设计和施工角度,对大能级强夯置换块石墩地基处理方法在原料堆场基础设计中的应用进行了详细的阐述,指出原料堆场对地基承载力要求较高,采用此方法进行地基处理,工艺简单,成本较低。 相似文献
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0 引 言 yh在岩土工程中 ,正确确定力学参数是非常重要的。岩土体的力学参数总体有 3类 :第 1类参数可由试验直接测出 ,如单轴抗压强度、抗拉强度等 ;第 2类参数由试验结果通过简单的计算可间接求出 ,如剪切摩擦角、内聚力等 ;第 3类参数是一些复杂本构模型中的参数 ,不能由试验直接或间接得出 ,往往通过试算、类比、经验估计等方法得到[1,2 ] ,如流变模型中的参数等。在岩土工程的数值分析计算中 ,正确确定岩土体的本构方程是很关键的 ,其中优选模型参数一直是困扰我们的问题。理论上 ,每种土体都对应着一特定流变力学模型 ,通过数学推导 ,可求出模型的本构方程。但一般来说 ,要确切知道模型 相似文献
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风景园林设计初步课程作为风景园林专业的专业基础课程之一,对于帮助学生打下扎实的设计基础有着深远影响。结合当前风景园林行业的发展,在风景园林设计初步课程教学中引入"设计研究"这一方法,构建以"理论基础—实践调研—分析研究—设计导论"为主线,"一个体系四个板块"为核心教学内容,进而形成"理论与实践""调查与研究""传承与创新"的设计研究式教学体系,实现"教"与"学"的双赢,促进教学质与量的同步发展。 相似文献
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A new method for the design of tall and super-tall buildings is presented in this paper. The method is based on transforming the stiffness properties of the building to equivalent beam properties. The equivalent beam is allowed to deform both in bending and shear to capture the true behavior of the building. The method is a stiffness based approach that later requires checks for strength. This is quite appropriate since the design of tall and super-tall buildings is governed by stiffness and not by strength. Knowing the load and assuming a desired shape of the beam, the required shear and bending rigidities of the beam can be calculated. The method is robust and easy to apply, and is particularly suited for space truss systems. The simplicity and efficiency of the method are illustrated with an example. 相似文献
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对色彩在城市硬质景观设计中的应用原则进行了探讨,力求探索将色彩设计有效融入景观设计的理论方法,以将色彩控制作为景观设计的重要内容,合理进行硬质景观色彩规划设计,从而提升城市特色和品质。 相似文献