浅谈板簧支架的钻夹具设计

通过板簧支架的钻夹具设计,保证了板簧支架的加工精度,使板簧支架与车架安装位置相对准确,防止了汽车跑偏,减少了汽车轮胎磨损。     

复杂地质条件下海底隧道大断面钻爆法安全掘进施工技术

结合翔安隧道工程实践,对高风险海底隧道施工中如何应用超前地质预报技术,如何设计减震爆破技术,如何处理软弱富水围岩,如何预防及应对突泥、涌水等突发事件等进行了系统的研究和应用,总结出一套适用于复杂地质条件下,大断面、高难度、高风险隧道施工的安全掘进方法,为工程安全施工提供技术保障。     

钻孔灌注桩技术在公路改建中的应用

文中结合广东省省道113线新兴段公路建设工程的实际情况,就钻孔灌注桩技术在建设中的实际应用和推广进行了深入的总结,详细阐述了该技术在实际施工中的具体施工方法、施工流程、施工工艺、技术原理和质量控制措施。     

Validation of an agent-based building evacuation model with a school drill

An effective evacuation of buildings is critical to minimize casualties due to natural or anthropogenic hazards. Building evacuation models help in preparing for future events and shed light on possible shortcomings of current evacuation designs. However, such models are seldom compared or validated with real evacuations, which is a critical step in assessing their predictive capacities. This research focuses on the evacuation of a K-12 (kindergarten to 12th grade) school located within the tsunami inundation zone of Iquique, Chile. An agent-based evacuation model was developed to simulate the evacuation of approximately 1500 children and staff from the school during a global evacuation drill carried out for the entire city. The model simulates the motions of heterogeneous human agents, and the simulations were validated using video analysis of the real event. Resulting error estimations between predicted versus measured flow rates and evacuation times are 13.5% and 5.9%, respectively. The good agreement between the simulated and measured values can be attributed to the known distribution of students and staff at the start of the drill, and their known exposure to emergency preparedness protocols. However, the results presented herein show that this mathematical evacuation model can be used for logistical changes in the emergency planning.     

京沪高铁旋挖钻钻孔施工技术

结合在京沪高速铁路天津特大桥钻孔桩的施工经验,阐述了旋挖钻的钻孔原理、钻孔施工工艺、成孔检测和常见的钻孔异常情况的处理,提出旋挖钻机施工的质量控制措施,以期提高旋挖钻机施工质量。     

苏通大桥北主墩钻孔平台施工技术探讨

笔者针对苏通大桥水深流急的工况,总结了该桥施工时放弃传统钢管桩支承平台方案,直接利用钢护筒作为承力构件,通过使用悬臂式定位导向架进行平台施工的这一特点,为保证该桥质量,缩短工期提供了重要条件.     

在不锈钢316上钻微小孔的难点与对策

针对不锈钢微小孔加工的特点,对整个加工过程中主要相关因素进行了分析,总结出了一种较简便的,切实可行的不锈钢微小孔加工方法。     

客车骨架矩形管双面钻孔设备研制

简要介绍客车骨架用矩形管自动化钻孔设备的开发方案及结构设计,并通过小批量使用进行了验证.     

自升式钻井平台钻台结构强度分析

钻台是自升式钻井平台的核心部分,其上布置有众多的钻井设备和结构。因此,钻台结构的强度符合要求是保证钻探作业安全开展的必要关键因素,对其结构强度进行研究十分有必要。以某375英尺自升式钻井平台的钻台结构为研究对象,考虑远洋拖航、作业和风暴自存三组主要工况,根据ABS MODU合理的选取与计算载荷,利用有限元软件MSC Patran/Nastran进行建模、计算及后处理。探讨了环境载荷与作业载荷的计算与施加方法,探究了钻台的结构强度分析方法并对其强度进行校核,为钻台结构设计提供指导。     

广州地铁多线综调演练能管理模式

系统地总结广州地铁2号线调整工程、3号线首通段、4号线大学城专线同时开通前的综调演练管理经验，通过对城市轨道交通系统的多线综调演练管理模式的分析和探讨，证明项目集成管理在城市轨道交通大规模综调演练中的应用是可行有效的。