热轧带肋钢筋焊接网的应用

介绍了热轧带肋钢筋焊接网的特点、工程应用情况和布网设计的心得 ,并进行了经济性分析比较     

三元乙丙橡胶防水卷材的开发及施工

采用合适EPDM配方,利用特殊加工工艺制造了综合性能优良的三元乙丙橡胶防水卷材,为使该卷材达到最佳防水效果,必须采取适当的施工方法。     

石材加工单的CAD研究

在AutoCAD中完成了对石材的分割设计后，需根据分割的具体情况组织生产加工单，将生产加工单的主要内容在AutoCAD中组织成明细表形式，通过Automation Action技术传输到Excel中，并在Excel中完成加工单。     

EPS板外墙外保温技术在现浇混凝土工程中的应用

膨胀型聚苯乙烯泡沫板(EPS)外墙外保温技术具有保温、解决热桥问题、保护外墙、增加建筑物使用面积和便于室内装修等优点。在现浇混凝土工程中应用的主要施工流程为绑外墙和柱钢筋，安装EPS板，支模，浇筑混凝土，处理门窗洞口、变形缝及墙面分格缝，粘贴网格布，抹聚苯砂浆等。为保证施工质量，应采取用聚苯胶堵变形缝、分格缝、洞口边缘缝，用封口胶封严门窗框四周，控制好墙面垂直度等措施。     

An aeration energy model for an immersed membrane bioreactor

A simple model for evaluating energy demand arising from aeration of an MBR is presented based on a combination of empirical data for the membrane aeration and biokinetic modelling for the biological aeration. The model assumes that aeration of the membrane provides a proportion of the dissolved oxygen demanded for the biotreatment. The model also assumes, based on literature information sources, a linear relationship between membrane permeability and membrane aeration up to a threshold value, beyond which permeability is unchanged with membrane aeration. The model was benchmarked against two full-scale plant to obtain the most appropriate and conservative value of the slope of the flux:aeration curve and the blower efficiency. Benchmarking in this way produced a match to within 20% of all key process plant operational parameters.The model demonstrated that significant reductions in aeration energy could be obtained through operation at lower flux and reducing the membrane aeration requirement accordingly, so-called “proportional aeration” at lower flows. Similarly, increasing oxygen transfer from membrane aeration would also be expected to decrease energy demand. A sensitivity analysis of some of the key parameters revealed that, of the key operating parameters, loading, SOTE and MLSS concentration remain the most critical in determining energy demand. It is suggested that a key parameter representing membrane aeration in MBRs is the mean in-module air upflow velocity U, since this gives a reasonable representation of the shear applied through membrane aeration. U was found to vary between 0.04 and 0.1 m/s across a number of modern large pilot and full-scale plant.An analysis reveals that significant reductions in energy demand are attained through operating at lower MLSS levels and membrane fluxes. Evidence provided from recent controlled pilot trials implies that halving the flux can reduce the aeration is suggested whereby the number of membrane tanks on line and/or the membrane aeration intensity is adjusted according to the flow, and thus flux, so as to reduce the overall aeration energy demand.     

东湖隧道钢板桩围堰结构设计

结合东湖隧道钢板桩围堰结构设计的工程概况,介绍了钢板桩围堰的结构设计,并进行了板桩结构土压力、板桩入土深度、堰体宽度、拉杆与钢板桩的内力计算及导梁计算等,以优化东湖隧道钢板桩围堰结构设计。     

我国碳纤维布在混凝土结构加固中的研究应用

详细介绍了我国碳纤维布加固技术在混凝土结构中的研究情况及施工特点和施工方式,并提出了今后发展的一些建议,以完善碳纤维布结构加固技术,促进碳纤维布在结构加固中的应用。     

对某连续刚构桥加固工程施工监控方案的探讨

通过对某预应力混凝土连续刚构桥的病害、加固设计进行分析,提出加固施工监控方案应充分考虑的关键工艺、工序,并进行了分析,以确保连续刚构桥梁加固工程的质量,为其他类似加固工程的施工监控方案提供借鉴.     

某大厦基坑支护事故及处理案例

针对某大厦基坑支护发生局部大变位,导致该侧边轴线桩倾斜、断裂的现象,分析了事故产生的原因及工程桩的加固补强措施,指出了目前温州基坑支护方面普遍存在的一些问题,以期保证基坑支护的质量和人身财产安全。     

板料拉深有限元模拟冲模速度研究

运用ANSYS有限元软件采用不同的模拟冲模速度进行板料拉深过程分析。研究表明,达到筒形件极限拉深高度而不发生起皱和破裂的模拟冲模速度有一个数值范围,在数值范围内任意选取模拟冲模速度,对起皱和破裂预测不会产生较大的误差,但取较大的模拟冲模速度能极大地提高模拟过程的计算效率。