浅埋暗挖法在小导管注浆加固施工中的应用

所谓小导管注浆加固地层技术，指的就是顺着隧道开挖轮廓线外，并纵向往前倾斜设置注浆管，同时把浆液注入进去以起到止水与超前加固围岩的效果，当然还具有超前管棚预支护效用。     

溪洛渡水电站右岸泄洪洞施工照明设计

施工照明在洞室施工中占有十分重要的地位，该文主要论述了选择合理的、优化的照明设计方案，使其既满足施工需要又能节约电能且符合安全要求，同时这也是加强工程项目管理，搞好成本控制的一项重要内容。     

十天高速公路软弱围岩隧道快速施工技术

结合十天高速公路隧道工程施工经验,介绍了软弱围岩隧道快速施工技术,具体阐述了隧道开挖模式和钻爆施工方案及其出渣机械配置,并对初期支护方法和各工序交叉衔接施工及作业时间进行了说明,为今后类似隧道施工积累了经验。     

隧道二次衬砌泵送混凝土配合比设计探索

根据慈母山隧道结构设计混凝土的强度,以及在特殊条件下混凝土的耐久性、和易性等技术要求,并结合本工程混凝土运输时间及气候条件、混凝土泵的性能、原材料的质量等实际情况,合理选用了原材料及其用量间的比例关系,从而设计出经济合理、质量好、泵送效率高的混凝土。     

黄土隧道施工工艺

以张家沟隧道工程为例，结合工程地质条件和黄土特征，介绍了黄土隧道的施工方法，重点阐述了黄土隧道的施工控制技术和施工工艺及注意事项，为今后类似工程的施工提供参考。     

长治县陶清河水库应急专项除险加固工程

以陶清河水库工程为例,介绍了水库的地理位置、区域环境等,针对工程现场检查发现的输水洞渗水严重的问题,对其原因进行了剖析,确立了解决方案,并阐述了具体的施工技术,指出及时排除输水洞存在的各种病险,对提高大坝的安全性、耐久性具有重要意义。     

使用Cisco路由器模拟测试IPv6隧道技术

IPv4向IPv6的迁移更好的解决了网络容量及网络性能。本文重点论述在Cisco路由器上如何模拟手动隧道及自动隧道两种传输方式,并就其工作原理和实现过程进行了较为详细的分析和概括。同时,对IPv6技术做了一定的预测。     

On the applicability of the laminar flow index when selecting surgical lighting

In modern operating rooms ultraclean air is supplied through the ceiling to prevent bacteria from entering an operating wound and cause infections. Operating lamps can disturb this flow of clean air. In this paper the accuracy of some aspects of the Laminar Flow Index of operating lamps was tested. The disturbance of the airflow was determined for different shapes and sizes of operating lamps in an isothermal situation. To accomplish this, an experimental study and a simulation study of a small room with an operating lamp were performed. The infection risk was found to be proportional to the projected surface area of the lamp. Although different lamp shapes resulted in a distinctly different flow pattern in the room, this did not affect the infection risk in a significant way. Operating lamps with a projected area smaller than 0.1 m² do not disturb the airflow at all in this particular setup.     

Improved analytical model for circumferential behavior of jointed shield tunnels considering the longitudinal differential settlement

Differential settlements of the shield tunnel along the longitudinal direction can significantly affect the circumferential behavior of segmental lining, degrading both the structure safety and serviceability. In this paper, the authors introduce both the shearing effect and flattening effect on the tunnel cross section, which was caused by the longitudinal differential settlement, into an existing analytical model of jointed shield tunnels. An example is then presented to illustrate the variation of the circumferential behavior of segmental lining, including both the structure safety and serviceability, along the longitudinal position. Finally, a series of parametric studies are performed to investigate how factors such as tunnel longitudinal settlement, property of surrounding ground, and the design parameters of segmental lining affect the circumferential behavior of the segmental lining.     

Upgrading the Arlberg tunnel to current safety standards

Austrian road tunnels within the Trans-European Road Network (TERN) must fulfil the requirements of the Directive 2004/54/EC (European Commission, 2004) not later than April 2019. This regulation has to be applied to all tunnels in the TERN with a length of more than 500 m, whether they are in operation, under construction or at design stage, and aims at ensuring a minimum level of safety for road users. One of the main features of this directive is the requirement for providing an egress possibility to a safe environment every 500 m throughout the whole tunnel.The Arlberg road tunnel has a length of some 15.5 km and is in operation for more than 35 years. It is a single tube tunnel operated with bi-directional traffic, but carries a quite low traffic volume. Hence, the construction of a second tube is not really cost effective. Currently the tunnel is equipped with a transversal ventilation system with remotely controlled smoke extraction dampers providing smoke extraction every 100 m. The maximum distance between egress possibilities to a save environment is some 1500 m. Due to the high costs of a construction of a second tube or a parallel running escape gallery, a novel solution was found. The existing fresh air duct will be used as safe escape way between the existing egress possibilities. This solution has big impacts on the ventilation system and on the requirements for thermal structure protection of the new egress ways, i.e. the fresh air duct. In order to overcome this problem, massive changes in the ventilation design have to be performed, accompanied by the installation of a high-pressure water-mist system for structure protection.