地铁隧道地层注浆预加固施工技术研究

针对不良地层,残余水及塌方问题,简单阐述了土体超前注浆预加固是暗挖隧道施工的关键环节,主要通过常用的几种注浆工艺来分析比较砂质地层中注浆加固的效果,通过性能、工艺、可操作性等方面的对比,选择适当的注浆方法,以保证在安全的前提下顺利进行工程施工.     

共同沟设计中的几个电气技术问题

共同沟(城市综合管沟)是将两种及以上的城市管线集中设置于同一人工空间中,利用城市地下空间建设共同沟铺设城市生命线设施所形成的一种现代化、集约化的城市基础设施.本文主要讨论共同沟建设中电力、通讯缆线共沟时的电磁干扰问题以及电力事故灾害的防护及改善措施.     

明挖隧道结构裂缝控制方法探讨

介绍了明挖隧道结构常见的裂缝类型,探讨了结构裂缝控制的抗放原则,详细地介绍了隧道结构温度裂缝的控制措施,以保证明挖隧道的工程质量,对类似工程的设计和施工有一定的借鉴意义。     

秦岭终南山公路隧道光面爆破施工技术

阐述了影响光面爆破效果的主要因素,对爆破器材的选择进行了分析,从掏槽眼、周边眼、爆破网络等方面对光面爆破设计进行了介绍,并提出了超欠挖控制措施,以供类似工程参考借鉴。     

改善STEYR系列厢式货车气动阻力特性的风洞试验研究

对用小型航空风洞进行厢式货车模型试验的有关技术问题进行了探讨；论述了气动阻力特性和导流罩等气动附加装置的减阻机理和效果。     

A NUMERICAL ANALYSIS OF THE VENTILATION PERFORMANCE FOR DIFFERENT VENTILATION STRATEGIES IN A SUBWAY TUNNEL

An unsteady three-dimensional analysis of the ventilation performance is carried out for different ventilation strategies to find out a ventilation method with a high performance in a subway tunnel.The natural ventilation performance associated with a train-induced air flow in a subway tunnel is examined.The dynamic layering method is used to consider the moving boundary of a train in the current CFD method.The geometries of the modeled tunnel and the subway train are partially based on those of the Seoul subway.The effects of the structure of the ventilation duct and the geometry of the partitions on the ventilation performance are evaluated.The results show that the combined ventilation ducts (to be designed),and the partitioning blocks installed along the middle of tunnel (already in existences) are helpful for air exchange.This study can provide some guidance for the design of ventilation ducts in a subway system.     

广蓄二期尾水洞不良地质段大断面开挖施工

广州抽水蓄能电站二期工程尾水洞出口段开挖施工针对围岩软弱破碎、地下水渗漏量大、浅埋隧洞及水下大断面开挖的特点，采用从地表预先灌浆、洞内超前预灌浆、从地表往下找锚杆预行锚固、洞内超前锚杆1超前管棚支护、先墙后拱法分部开挖、分部分台阶开挖、喷锚支护跟进掌子面等工程措施和施工方法。依据不同地质条件采用不同施工方法或几种方法联合应用，灵活调整喷锚支护参数，并采用变形监测指导施工，洞内未发生任何塌方。     

光面爆破技术在大断面隧道硬岩施工中的应用

结合具体工程实例,阐述了光面爆破的定义及基本作业方法,重点对硬岩隧道中光面爆破技术进行了分析和探讨,提出了光面爆破的质量控制措施,以完善光面爆破施工技术,可供同类工程参考借鉴.     

地铁应对恐怖袭击的安全设计及建筑措施探讨

地铁作为一种高风险建筑．面临各种形式的恐怖威胁。本文分析了可能威胁到地铁运营安全的爆炸、生化及放射性袭击、纵火等主要恐怖活动，并从地铁设计、现行地铁设计规范、制度管理、设备设施等各方面给出了应对恐怖袭击的解决方案。     

Plant Volatiles Mediate Host-Finding Behavior of the Apple Leafcurling Midge

The behavioral responses of apple leafcurling midge,Dasineura mali Kieffer, mated females to foliage from host and nonhost trees were investigated in a wind tunnel. When released downwind of apple or pear foliage, females exposed to apple were more likely to exhibit upwind flight and to approach and land on foliage. On apple foliage, landings were concentrated on buds and immature leaves. Probability of taking flight and latency to flight did not differ for females exposed to apple and pear. When foliage was placed behind screens to obscure plant visual stimuli, females again distinguished between apple and pear, with more of the females exposed to apple odors flying upwind and landing. Females exposed to pear odors were more likely to fly upwind, approach, and land than females exposed to clean air. Odors from immature apple foliage triggered orientation responses in a larger percentage of females than odors from mature apple foliage. A dichloromethane extract of immature apple foliage also triggered orientation responses.