某加固楼板的原位荷载试验

某商住楼为框架剪力墙结构,现浇钢筋混凝土楼盖,其中501房的客厅楼板由于混凝土出现质量问题,进行了加固处理。为检验该混凝土楼板是否满足承载能力要求,对其进行了原位荷载试验。通过荷载试验实测数据与理论计算数据进行比较,评价该构件安全状态及加固效果。文章可为现浇钢筋混凝土楼板原位荷载试验分析方法,以及评价楼板加固效果提供参考。     

城市客运交通结构内部成本与交通效率优化模型

为实现城市客运交通系统的可持续发展,基于经济、社会和环境可持续性发展,建立以交通效率最大化和交通系统内部成本最小化为目标的城市客运交通结构双目标优化模型,并利用多目标规划中的理想点法求解模型。以长春市为例,验证了模型的正确性,优化后的交通结构体现了城市客运交通系统的可持续发展目标。     

交通荷载下石灰改良软土路基的动力特性试验研究

以上海宝山区某软土路基为对象,采用石灰进行改良,对石灰改良软黏土开展了动三轴试验,研究了在不同掺灰量、围压和固结比条件下,石灰改良路基土的动强度和临界动应力特性.试验研究结果表明:掺灰量、围压和固结比对石灰改良土的动力特性有较大影响,动强度与临界动应力随着掺灰量、围压和固结比的增加而增大;围压对临界动应力的影响最大;较大围压时,对于掺灰量一定的石灰改良土,其临界动应力保持在相对稳定水平.     

散装物料运输车装料口盖驾驶室内操作可行性分析

针对散装物料运输车装料口盖的开关为手工操作,操作费时费力,且易发生事故的问题,对各功能模块进行了可行性设计,分析了散装物料运输车装料口盖改装为在驾驶室内操作的可行性。     

秦皇岛港煤炭码头装船效率统计分析体系研究

为真实再现港口装船效率提供依据,为煤炭码头运营管理提供决策支持,对秦皇岛港煤炭码头装船效率统计分析体系进行研究。分析不同统计方法对装船效率指标的影响因素,进而建立由不同煤码头多种因素构建的装船效率统计分析体系,可供参考。     

黄骅港综合港区及散货港区铁路规划探讨

港口铁路规划既要考虑铁路相关因素,同时需要结合港口自身特点,从立足于港口、服务于港口的角度出发,统筹兼顾各项因素。本文通过对黄骅港综合港区及散货港区铁路规划的分析总结,得出港口铁路规划中的一些建议。     

适用于江海联运海港自动化集装箱码头的总体布置方案

针对具有驳船小港池的海港集装箱码头的特点,结合自动化集装箱码头建设发展的需要,突破自动化集装箱码头堆场垂直于码头前沿线布置的局限性,创新提出堆场箱区平行于码头前沿线布置的总体自动化集装箱码头方案。引入智能驾驶与卫星导航等技术,采用智能驾驶运输车替代传统集装箱卡车,从而使平面工艺总体方案适用于江海联运吞吐量占比高的运输模式,同时实现港区自动化,降低建设与运营成本,为我国传统集装箱码头的自动化升级改造提供借鉴。     

Developing management guidelines for oil and gas activities: The louisiana experience

Abstract

Preliminary management guidelines have been derived for oil and gas activities in coastal Louisiana. Derivation of these guidelines was done in terms of the natural function of the coastal ecosystem; this means that all economic activities should be designed to complement natural function as much as possible. The guidelines range in scope from very specific, almost performance standards, to very general admonitions. For example, we have suggested that spoil banks, produced as a result of dredging, should not be higher than the height of the daily tide or roughly 15 cm in coastal Louisiana, and at the other extreme, we have suggested that all dredging should be done with great care during wildlife migrations, spawning, and nesting times.     

Lessons Learned from Lake Shiwha Project

The Lake Shiwha Project was planned in the late of 1980s about 10 years before establishing ICZM policy and wetland conservation policy in Korea. The project was to build a dike of 12.7 kilometers in the mouth of a estuary, thereby to keep freshwater instead of brackish in the lake and to create land of 110 square kilometers for agriculture and industrial complex by draining out of associated wetland. However the Korean government abandoned keeping freshwater in the lake as soon as completing the dike because of not being able to control of serious pollution in the lake. This article analyzes the characteristics of the project such as bias of feasibility, degree of transformation and time period of loss of goal that led into environment disaster and extracts some implications for lessons.