抗裂水泥碎石基层配合比设计与施工质量控制

结合内蒙古二连浩特-赛汉塔拉一级公路水泥碎石基层的施工,介绍了它的配合比设计和拌和、摊铺、碾压、养生等施工工艺,并总结了质量控制要点。     

FPSO模块支墩焊接接头低温CTOD韧度试验研究

模块支墩是海上浮式生产储油船(FPSO)中连接上部模块与主甲板的关键结构,必须有效保证其焊接接头的韧度以防裂防断。按照国际通用规范BS7448和DNV-OS-C401的要求,对我国渤海PL19-3油田300ktFPSO的模块支墩焊缝和熔合区进行了低温(-18℃)裂纹尖端张开位移(CTOD)的试验研究。试验研究结果表明:按拟用焊接工艺所焊接的模块支墩焊接接头,其焊缝和熔合区的CTOD试验值都能满足国际通用规范DNV-OS-C401规定的要求(不小于0.15mm),因此,可以确认,该焊接工艺可应用于模块支墩的焊接施工,并且焊后的模块支墩可以免除退火处理。     

Eradication of algae in ships'' ballast water by electrolyzing

In order to verify the effectiveness of electrolytic treatment on ships' ballast water,experiments are carried out by a pilot system in laboratory. The raw seawater and seawater with different concentrations of different algae are simulated as ships' ballast water. The algae in the raw seawater can be killed if it is treated by electrolysis with an initial residual chlorine concentration of 5 mg/L. If the seawater with one kind of algae (Nitzschia closterum, Dicrateria spp., or Pyramidomonnas sp.105cells/mL) is treated by electrolysis with an initial residual chlorine concentration of 5 mg/L, the alga can be sterilized. If the seawater with one kind of algae (Dunaliella sp., Platymonas or Chlorella spp.)is directly treated by electrolyzing with an initial residual chlorine concentration of 4 mg/L, the instant mortality changes with the concentration of different algae. However, after 72 hours, in all treated samples, there are no live algal cells found.     

热带雨林高速公路的生态景观绿化设计

根据云南省西双版纳热带雨林自然保护区生态环境特点和高速公路的建设条件,结合植被的生态恢复与重建理论,分别对思小（思茅-小勐养）高速公路的边坡、中央分隔带、立交区、隧道和特殊区域（取弃土场、服务区、停车区等）进行生态景观绿化设计。景观设计以自然景观和人文景观为设计元素,生态防护采用以植物防护为主并与工程防护相结合的防护措施;绿化主要采用乔灌草复合模式,并适当运用灌草混栽、乔灌结合的模式;尽量利用原生植被,以乡土物种为主,合理搭配目标植物和先锋植物,充分体现物种多样性,实现人工绿化向周边环境的自然过渡。     

二灰碎石基层配合比及压实度控制

为使沥青路面保持较好的性能并延长其使用寿命,提出一种确定混合料最大干密度与含石量线性回归关系的方法,使压实度检测精度大大提高,为以后的二灰碎石结构层施工中压实度的控制提供可借鉴的经验.     

受公交停靠站影响的道路通行能力分析

公交停靠站是影响道路路段通行能力的重要因素,传统的通行能力计算方法忽略了这一因素,使得计算结果与实际有一定差距.针对这一不足,提出改进思路.根据公交停靠站对道路通行能力影响的不同,将其分为港湾式和非港湾式两种类型进行分析,利用排队论和间隙理论得到相应的修正系数,最后以工业区规划作为实例项目进行通行能力验算,为城市道路规划和服务水平的确定提供依据.     

高速公路沥青路面抗滑性能影响因素分析

分析了影响高速公路沥青路面抗滑性能的因素,提出了提高路面抗滑,性能的措施.     

上海长江大桥斜拉索施工工艺

上海长江大桥主通航孔桥为双塔双索面五跨钢箱梁斜拉桥,其跨径布置为(92+258+730+258+92) m.斜拉索为空间双索面扇形布置,每个索面23对(全桥另有4对0号索),全桥共192根.介绍超长、大直径斜拉索塔端牵引、张拉施工技术.     

Eradication of algae in ships＇ ballast water by electrolyzing

In order to verify the effectiveness of electrolytic treatment on ships＇ ballast water, experiments are carried out by a pilot system in laboratory. The raw seawater and seawater with different concentrations of different algae are simulated as ships＇ ballast water. The algae in the raw seawater can be killed if it is treated by electrolysis with an initial residual chlorine concentration of 5 mg/L. If the seawater with one kind of algae （Nitzschia closterum, Dicrateria spp., or Pyramidomonnas sp.105cells/mL） is treated by electrolysis with an initial residual chlorine concentration of 5 mg/L the alga can be sterilized, If the seawater with one kind of algae （Dunaliella sp., Platymonas or Chlorella spp.） is directly treated by electrolyzing with an initial residual chlorine concentration of 4 mg/L, the instant mortality changes with the concentration of different algae. However, after 72 hours, in all treated samples, there are no live algal cells found.     

热再生技术简介

通过试验路对热再生技术进行分析,确定热再生的施工工艺、质量控制点,以及对其经济效益进行分析.结果表明其在我省范围内是可行的.