埋地卧式储罐抗浮稳定性验算的一种新方法

通过分析现有抗浮验算方法中存在的缺陷，提出一种抗浮验算的新方法，该方法综合考虑了环境条件对埋地卧罐抗浮稳定性的影响。计算表明，新方法能效提高埋地储罐抗浮验算的可靠性。     

增加压重在玻璃厂循环水池抗浮设计中的应用

介绍了玻璃厂循环水池的抗浮问题及各种抗浮措施。详细解析了增加压重抗浮稳定性设计,并结合工程实际按理进行计算。增加压重是玻璃厂循环水池抗浮设计的主要措施之一。     

埋地液化石油气贮罐的设计

针对埋地液化石油气贮罐特殊的工程环境，从设计条件、结构设计、强度及稳定性计算、抗浮验算、防腐蚀设计等方面进行了详细分析，认为对埋地液化石油气贮罐取设计温度４８℃、设计压力１．６ＭＰａ是安全可行的，并提出了埋地贮罐的设计计算方法。     

埋地卧式容器设计注意事项

埋地卧式容器由于具有安全可靠,节约耕地的优势,在工程上应用得越来越多。本文主要介绍了埋地卧式容器的设计要点,给出了埋地卧式容器附加外压及鞍座附加反力的计算方法,提出了埋地卧式容器的抗浮计算方法,另外,介绍了埋地卧式容器常用的防腐方法。     

浅议水泥工厂水池抗浮设计

对于抗浮不满足的水池,根据水文条件、场地地质情况、抗浮不满足产生的危害程度、工期和工程经济性,从常见的抗浮措施包括增加配重法、抗浮桩、锚杆抗浮法和释放水浮力法中优选,确定应该采用的抗浮措施。     

某消防水池变形原因分析及处理措施

某消防水池由于施工完成后,地下水位发生变化,导致水池被顶起,并发生倾斜,严重影响了该水池的正常使用。针对这一事故进行了详细地分析,认为该水池变形是由于局部抗浮设计不足所致。根据现场实际情况,提出合理的解决措施,使该水池能正常投入使用。     

天然气管线抗震性校核分析方法与应用

管线抗震性校核是管线设计的重要内容。基于GB/T 50470—2008《输送管道线路工程抗震技术规范》,分析了管线抗震校核的必要性,介绍了抗震校核的指标、方法及步骤,着重讨论了埋地管材的选择范围和管道稳定性判断依据,并结合工程项目实例对一般埋地直管和弯管的拉伸应变与压缩应变进行了分析计算及对比。结果表明,项目一般埋地直管和一般埋地弯管的抗拉伸性都很好;相对直管,弯管的抗压缩性较差。     

埋地储罐的设计

目前对于埋地储罐的设计并没有明确的设计标准和制造规范,针对埋地储罐设计中遇到的一些问题进行分析和阐述,分析了埋地储罐上方填土对储罐产生的外压力,提出应按照外压对设备进行校核;提出埋地储罐应进行抗浮验算;并指出设计埋地储罐时应该在设备结构上注意的问题及设备防腐应满足的要求。     

冻土中输气管道的管土相互作用分析

冻土区埋地式管道对多年冻土地基产生扰动,形成融化圈,同时,冻土的融沉及活动层的冻融对管道地基工程造成破坏,引起管道地基的不均匀变形,影响安全。文章提出冻土中输气管道的管土处理方法,为冻土区埋地式管道敷设提供依据。     

立式埋地玻璃钢圆柱壳的稳定性分析

基于工程实际,采用承压不承拉的杆单元模型解决埋地结构与周围土体的相互作用问题,推导出杆单元与土体之间材料参数表达式,建立有限元计算模型,实现立式埋地玻璃钢圆柱壳结构稳定性有限元分析。通过与传统公式计算结果比较,得出传统稳定性计算公式不能用于计算立式埋地结构。参数对结构稳定性的影响结果表明:增加结构的厚度、弹性模量以及周围土弹性模量可提高稳定性,其中厚度的影响更为显著;结构稳定性随壳体长度的增加而降低。在工程应用中可采用加筋结构减小计算长度以及选择合适的回填材料和回填方式来提高土的弹性模量的方法,有效提高稳定安全性,对经济性影响较小。     

BFRP抗浮锚杆力学性能研究进展

随着大型地铁、深基坑等复杂地下工程的发展,结构抗浮问题在工程中更加重要。而采用玄武岩纤维增强复合材料（BFRP）抗浮锚筋是为良好的选择。BFRP抗浮锚筋具有抗拉强度高、耐久性和环境友好等优点,适用于复杂地质条件的地下工程抗浮技术。但目前关于BFRP抗浮锚杆的研究相对较少,对BFRP抗浮锚杆力学性能尚缺乏系统的认识。基于此,本文归纳总结了针对BFRP抗浮锚杆受力性能的研究进展,探讨了在相关试验与数值模拟方面的研究内容,分析了BFRP抗浮锚杆研究中存在的问题与缺陷,对其后期力学性能的研究提供相应的建议与思路,所得结果为BFRP抗浮锚杆的应用提供了基础。     

地下工程的抗浮设计及措施介绍

随着我国城市化建设进程的进一步加快，城市地上空间和土地资源日益紧张。为确保城市更好更快的发展，对其地下空间的开发和利用迫在眉睫。但由于地下水的存在，使得地下工程易受浮力的不利影响。基于此，本文以地下结构的抗浮问题作为研究对象，探讨了抗浮技术的作用原理，介绍了抗浮设计及其施工技术，所得结果为地下工程抗浮技术的应用提供了基础。     

Separating Biogenic and Adsorbed Pools of Silicon in Sediments Using Bayesian Inference

There are several potentially mobile pools of silicon in sediment, e.g. biogenic Si (BSi), dissolved Si and adsorbed Si (AdSi) which makes the studying of a single pool very difficult because of the interference caused by other Si pools. In order to evaluate the impact that different Si pools have on the Si cycle of water ecosystems, it is important to have reliable estimates of the pool sizes. The objective of this study was to estimate the joint concentration distributions of two pools, AdSi and BSi, in, of a small catchment area in southern Finland. The potential correlation between BSi and AdSi was studied to find out if the AdSi pool can be inferred from the total pool (BSi + AdSi). The potential error caused by simultaneous extraction of AdSi in BSi determinations was also investigated. Because all extraction methods include variability due to measurement imprecision and inter-sample variation, the different sources of variation were explicitly separated to be able to infer the underlying true variation of AdSi and BSi within the study area. We have utilized Bayesian inference for this task.     

机械搅拌澄清池对低温高稳定原水处理调试

分析低温高稳定性原水的特性以及斜管机械搅拌澄清池的运行参数,首先查明澄清池出水浊度不达标的原因,然后提出机械搅拌澄清池的调试方案。通过对投加混凝剂药量的调节,排泥周期和搅拌机转速的调节,使得澄清池出水浊度能够达标。     

棒锤山露天铁矿边坡稳定性分析

采用ANSYS有限元法和FLAC方法分析边坡的应力应变过程,对其稳定性作出评价.有限元法采用邓肯E-B模型及理想弹塑性广义米赛斯模型来构造边坡岩土体本构关系;建立5个典型边坡剖面的二维模型;用理想弹塑性Mohr-Coulumb模型,模拟不断折减岩体抗剪强度系数时岩土体单元的应力应变关系,再利用ANSYS和FL-AC方法计算出边坡备剖面的安全系数;将这两种方法的模拟结果进行分析比较,最后给出评价边坡的稳定性和治理方案.     

高表面低翘曲玻纤增强PA复合材料的制备和性能研究

依据玻纤增强尼龙(PA)表面不良,翘曲的机理,选用不同提高表面质量的方法,制备了系列高表面低翘曲玻纤增强PA复合材料。结果表明:具有较高形状对称性的填料,如碳酸钙、滑石粉、云母粉和玻璃微珠都能不同程度地提高玻纤增强PA体系的表面质量,降低翘曲;自制的抗浮纤母粒,结晶慢的聚合物也都能有效改进该体系的表面质量。     

An Improved Three-Dimensional Non-Equilibrium Mixing Pool Model

This paper presents an improved three-dimensional non-equilibrium mixing pool model.It is a simplified form of the original model and is more practical for applications.The simulation re-sults show that the industrial scale distillation tray columns can be described closely by the improvedmodel.The effects of model parameters,such as the number of mixing pools,the point efficiencyand flow pattern,on separation are analyzed quantitatively.     

Pools and Constraints in Methanol Conversion to Olefins and Fuels on Zeolite HZSM5

Large reserves of natural gas are causing high actual interest for olefins and automotive fuels via methanol conversion on zeolite HZSM5. The chemistry of this process involves spatial constraints in the zeolite pores and a set of reacting compounds hosted dynamically in the pores. The kinetic scheme of reactions in this pool regime is a matter of current debate––a problem being the complexity of product composition and its temporal changes. However, the multi-compound product composition, if measured accurately and even time-resolved––including the compounds retained in/on the catalyst––is a profound source of information. Methanol conversion has been studied with zeolite HZSM5 and zeolite HY accordingly. The pool mechanism has been developed further, specifically as depending on frustration for distinct reactions. Particular pools as for olefins or for gasoline are specified. Mechanism changes with reaction time and with reaction temperature are described, including the surprising phenomenon of reanimation and the mechanisms of catalyst deactivation.     

Structural equation modeling for the estimation of interconnections between the P cycle and soil properties

The aim of this study was used a basic hypothetical structural model with latent variables to analyze the interconnections between the pools of stable P (inorganic P (Pi) and organic P (Po)), labile P (Pi and Po) and available P (Mehlich-1 P) and the pools of organic matter (OM) content and physicochemical properties in tropical soils of differing pedogenesis. We used structural equation modeling for designing models for two groups of soil: (1) mineral soils with low to medium organic matter content and (2) mineral soils with high organic matter content and organic soils. The proposed structural models were consistent with the hypothesis of dependence between the pools of P and organic matter as well as physicochemical properties in tropical soils. In general, stable and labile P pools acted as P sources for the available P pool; furthermore, the strength of these structural relationships was strongly associated with soil organic matter content. Yet the pool of physicochemical properties behaved as a sink of P for the labile P pool, however with a beneficial effect in maintaining the stable P pool. The pools of P and OM are strongly bonded in tropical soils under different pedogenesis. All structural models evidenced that various forms of P in different levels of lability could contribute in keeping the supply of bioavailable P, yet its magnitude would be regulated by P buffer capacity of each soil.     

First Year Operation Report of the Corona Discharge Ozone Swimming Pool Water Treatment Systems at the Peck Aquatic Facility,Milwaukee, Wisconsin

The two corona discharge ozone swimming pool water treatment systems installed in the Peck Aquatic Center in Milwaukee, WI now have been in continuous operation since September, 1987. The two pools are part of the Karl Jewish Campus Facility of the Harold and Judy Sampson Campus of the Milwaukee Jewish Community Center.

The operation of these water treatment systems has shown that safe and high quality pool water is obtained reliably and economically. One pool (Main Pool) is of Olympic size, the other (Learner pool) is designed especially for use by children. Both pools utilize a full corona discharge ozone water treatment system. They were the first ozone systems in the U.S. to be built for public pools using the process of ozonation, flocculation, filtration, ozone removal and residual chlorination.

An extensive testing program was initiated in cooperation with the Wisconsin Department of Health. The bacteriological water quality from these swimming pools was in compliance with Wisconsin State Health Regulations and the German DIN Standard 19,643.

The first year of operation of the Peck Aquatic Center has shown that the corona discharge ozone pool water treatment process can:

1) Operate reliably in a public swimming pool environment without the need for highly or special operator qualifications.

2) Produce continuously bacteria- and virus-free pool water without the harmful and unpleasant effects of chlorine.

3) Creates a user constituency group praising and promoting the use of “minimal chlorine swimming” in the community.