浅谈西姚互通匝道桥现浇预应力钢筋混凝土箱梁施工

介绍了现浇式预应力钢筋混凝土西姚互通匝道桥箱梁施工,提出了在施工中应当注意的一些问题,并以自己多年的技术工作经验,提出了具体的技术对策,可供技术同行参考。     

Soil Body Deformation Caused by Construction of a Double-Line Shield Tunnel with Multiple Factors北大核心CSCD

Considering the influence of many factors (soil loss, frontal additional thrust, the friction force of the shield shell and the additional grouting force), a method for improving the uniform soil body movement model is pro-posed, and a mechanical calculation model is established to study the calculation method for soil body deformation caused by double-line parallel shield driving. Based on the Mindlin solutions of elastic mechanics, the theoretical solutions for soil body deformations caused by the last three factors are calculated; considering the uniform soil body movement model, the theoretical solutions for soil body deformations caused by soil loss are calculated, then the to-tal theoretical solutions for soil body deformations under multiple factors are obtained by means of superposition. The vertical surface settlement, vertical horizontal displacement, and vertical displacements of the soil body at different depths of Hangzhou Metro Line 1 are calculated to analyze the variation laws. Meanwhile the influential factors for horizontal displacement variation are studied. The research shows that with a change of depth, the settlement of the soil body changes within the scope of 10 to 13 m in the horizontal direction near where the maximum settlement occurs;the direction of the horizontal displacement of the soil body changes with a change of the positional relationship be-tween the calculation points and the tunnel; and with an increase of interval J for the two tunnels, the horizontal dis-placement of the soil body of a deep double-line tunnel decreases while the displacement near the surface changes slightly. © 2018, Editorial Office of "Modern Tunnelling Technology". All right reserved.     

隧道紧急停车带流场和局部阻力数值模拟

基于N-S方程和k-ε湍流模型,采用CFD方法对隧道内风压、风速场进行了数值模拟及计算分析,得到了隧道纵向气流流动规律、速度和压力分布规律,计算出了隧道紧急停车带的局部阻力系数。与试验结果相对比,数值模拟结果与试验结果非常吻合。     

路企直通运输在大窑湾港的运用

采用传统的铁路运输组织方法,铁路和港口间存在交接车手续复杂,机车等待时间长,路港信息交流不畅等问题.本文论述了路企直通运输方式在大窑湾港的运用,重点研究了运输组织流程再造、统一调度指挥、合署办公机制等优化措施.直通运输的实施,提高了港口和港前站的作业效率,实现了铁路和港口的双赢.     

冷再生技术在周口市106国道大修工程中的应用

周口市106国道大修工程的实践证明,采用先进的现场冷再生技术替代传统方法,能很好地解决原路段的病害,使其功能得到恢复、结构得到补强。而且该方案造价低,对交通干扰小,是一种很好的道路维修方案。     

Dynamic diurnal social taxonomy of urban environments using data from a geocoded time use activity-travel diary and point-based business establishment inventory

In this paper, we explore the diurnal dynamics of joint activity participation in a small city in Pennsylvania, USA, using behavioral data and an inventory of business establishments. We account for the variation caused by the collective impact of social, temporal and spatial choices of individuals to produce predicted space–time visualizations of activity participation. The focus is on how social contexts of an activity impact the temporal and spatial decisions regarding the activity locations and how this impact varies depending on activity types. A comparison across activity types and social interaction types is made among spatial patterns during a day. The CentreSIM dataset, which is a household-based activity diary survey collected in Centre County (Pennsylvania, USA) in 2003, provides very detailed social interaction information enabling the analysis of social, spatial and temporal aspects of activity participation. In this paper we use this information to develop a spatio-temporal interpolation method and demonstration based on kriging. In this way, we extract the dynamic social taxonomy of places from the behavioral information in the dataset and suggest how urban and transportation models can be informed from the dynamics of places by observing “what is taking place” (activities being pursued in the context of this paper) combined with “what exists” (business establishments) or “what is available” (businesses that are open). The method here can also be used to improve the design of urban environments (e.g., filling gaps in desired activity locations), manage specific places (e.g., extending the opening and closing times of businesses), study transportation policies that are sensitive to time of day (e.g., pricing of parking to discourage crowding and traffic congestion), and modeling of spatio-temporal decisions of social activities in travel demand models (e.g., to guide the development of model specification and representation of the space in which behavioral models are applied).     

浅议海事行政处罚中的地域管辖

对海事违法行为实施行政处罚,“由违法行为发现地所在管辖区的海事机构管辖”可使调查、取证、处理的效率与结果得以充分保证,这一地域管辖原则更符合海事行政处罚的实际情况和特点。     

城市主干道调头口设置探讨

随着城市的不断发展,城市主要干道中调头需求已成为交通流中不可忽视的一部分。该文通过对北京市通州区城市主干道现况调头口的运行状况进行调查研究,分析车辆调头对交叉口交通功能的影响程度,就如何合理地设置调头口,得出初步的结论,从设计和管理的角度提出建议以供参考。     

水泥混凝土路面12小时内通车快速修复技术研究

文章对预制拼装6h快通技术,现浇12h快速修复技术进行了分析。从理论上提出了预制板弯拉强度和几何尺寸的确定方法,阐明了预制拼装修复技术的各道施工工艺。研究了SBTK10型快速修补剂的性能,结果表明,SBTK10型快速修补剂具有良好的施工性能、早期强度发展快、微膨胀、后期强度不倒缩、脆性低、耐久性好等优点,可满足高速公路水泥路面12h整板全厚修复通车的要求。     

论旅游公路建设中地名文化资源的挖掘利用——以神农架木鱼坪至兴山昭君桥旅游公路建设为例

地名文化凝聚着一个地区多年的历史文化．而在当今的旅游公路建设中,对这一宝贵资源的利用研究明显不足。以神农架木鱼坪至兴山昭君桥旅游公路为例,分析地名文化资源内涵,结合旅游公路建设特点,提出在公路设施命名、标志牌设置、景观规划设计中利用地名文化的建议及相关的原则与方法,对于旅游业的深入发展具有重要的指导意义。