深基坑桩锚支护结构锚索轴力监测分析

为了解深基坑桩锚支护结构锚索的工作状态,对石家庄市鸣鹿大厦深基坑桩锚支护结构中预应力锚索轴力进行了锁定及基坑开挖回填过程中的监测。监测成果的分析表明：锚索锁定时穿心千斤顶油压表读数与锚索实际轴力存在较大差别,究其原因是张拉设备与锚具的不匹配;下道锚索张拉锁定会使上道锚索轴力减小,但影响不大;基坑回填后锚索轴力有所下降,但降幅不大;实测最大锚索轴力为锚索设计值的17.9%～50.7%。     

Social,Institutional, and Psychological Factors Affecting Wildfire Incident Decision Making

Managing wildland fire incidents can be fraught with complexity and uncertainty. Myriad human factors can exert significant influence on incident decision making, and can contribute additional uncertainty regarding programmatic evaluations of wildfire management and attainment of policy goals. This article develops a framework within which human sources of uncertainty in wildfire management can be classified and managed, specifically identifying social, institutional, and psychological factors that can affect wildland fire incident decision making. These factors are reviewed in the context of wildland fire incident management and the literature regarding fire manager decision making. I then provide specific recommendations for addressing these issues, with a focus on improving incident decision processes. Extending this framework to consider a broader set of human factors and to consider how human factors affect the broader wildfire management spectrum could lead to improved fire management outcomes.     

湛江市海洋产业发展的资金支持研究

湛江是海洋经济总量连续多年稳居广东省第三的海洋大市,其海洋产业迎来了快速发展的良机,亟需资金支持。基于金融创新理论、信贷配给理论和融资约束理论等金融发展理论,在分析湛江海洋产业资金支持实践和存在问题的基础上,提出信贷政策引导、多层次资本市场融资、海洋投资信托基金、信用担保、海洋保险联动和海洋金融服务平台等方面的建议,为探索促进湛江市海洋产业的发展提供参考。     

清单式管理在地震应急技术保障中的应用研究

地震是一种突发性强和破坏性大的自然灾害,重特大地震的发生往往致使较重的人员伤亡和财产损失。科学制作并合理利用应急技术产品是提升抢险救援效率的有效措施,可以有力支撑指挥层级快速决策与应急指挥。以四川长宁"6·17"地震中的应急技术保障工作为参鉴,结合当前常用应急监测技术手段,全面梳理应急技术保障产品在实践应用中的常态问题。并在此基础上,引入"清单制"管理思维,从何种阶段制作哪类产品,哪类产品需要哪些要素上进行细化构思,建立地震灾害应急技术保障产品清单,从管理模式上规范技术保障机制,促使地震应急技术支撑有力并且有序,切实提升震后应急处置效率。     

Integrating GIS and DSS for identification of suitable areas for artificial recharge,case study Meimeh Basin,Isfahan, Iran

Flood spreading is an inexpensive method for flood mitigation and artificial recharge of aquifers that results in a large budget return for relatively small investment.It is necessary to study some regional characteristics in order to determine the appropriate areas for artificial groundwater recharge by flood spreading in Meimeh Basin, Isfahan Province, Iran. Necessary regional characteristics to be studied are: slope, infiltration rate, sediment thickness, transmissivity, and water quality. In this research to identify suitable areas for artificial recharge several thematic layers were prepared, assigning each layer to one of the mentioned characteristics. The thematic layers were classified to several classes based on the existing criteria. All of the classes of the thematic layers were integrated and analyzed using a decision support system (DSS) in a geographical information system (GIS) environment. Finally suitability of the integrated classes for artificial recharge was identified in which the following classes were separated:(i) Very suitable, (ii) suitable, (iii) moderate suitability, and (iv) unsuitable.The validity of the generated model was verified by applying the model to a number of successful floodwater spreading stations throughout Iran. The verified model showed satisfactory results for all of the stations. The results for Meimeh Basin showed that about 70% of the Quaternary sediments in the studied area are suitable and moderately suitable for artificial recharge by flood spreading.     

Benefits of the combined use of stochastic multi-criteria evaluation with principal components analysis

Multi-criteria analysis techniques are well known decision support methods and are widely applied in various disciplines. However, defining the input criteria values for the basic decision matrix which contains all criteria values for every alternative considered is normally not an easy task. Especially qualitative criteria variables which are frequently represented as linguistic terms may be hard to quantify. Moreover, some criteria cannot be represented by just one crisp value, but they may offer a range of possible values. Stochastic multi-criteria approaches which call for distribution models instead of single numerical values can be used in these cases. Outranking multi-criteria methods proved that simulation based stochastic techniques are well suited to give better insight into the preference structure of a variety of decision alternatives. However, besides the knowledge of the preference structure, it is also important to find out about the similarity of decision alternatives which allows a modeller to categorize a decision alternative as a really unique option or as just one option out of a greater subset of very similar alternatives. To be able to perform this categorization, principal components analysis (PCA) was used. The results of the PCA are compared to the results of a stochastic outranking analysis.     

杭州市商业银行营业及办公用房深基坑支护技术

阐述了在杭州粉砂土层中进行深基坑支护的施工技术。该基坑是目前杭州市第一个在粉砂土层中采用波形管柔性接头施工的地下连续墙，通过该工程的成功施工，为今后杭州市类似工程的深基坑支护提供具体成功实践经验，对杭州即将开工的地铁建设产生积极和深远的影响。     

五层地下室深基坑边坡支护的设计与施工

广州市华标涛景湾二期工程建筑物设计5层地下室，基坑深度大，周围环境复杂，在基坑边坡支护结构设计与施工过程中，对土层与岩层区别对待，经过精心设计与严格施工，取得较好的实效。介绍了该基坑边坡支护设计及施工要点。     

深部复杂地质条件下矿井交岔点支护关键技术研究

由于具有断面大、结构复杂、施工扰动次数多等特点，深部条件下的矿井交岔点工程支护难度一般比较大。通过现场地质条件的调查，用确定施工工程难度系数的方法，选择对应的支护形式和参数。深部复杂地质条件下的大断面交岔点，主要具有4种变形力学机制，即构造庖力作用力学机制、白重应力作用力学机制、结构变形力学机制和与施工过程有关的变形力学机制。在分析变形力学机制的基础上，可以进行最优的支护参数设计和过程设计。优化后的试验方案应用于具体的工程实例，取得了良好的支护效果。