雁门关隧道进口施工环境综合治理技术

结合大运高速公路雁门关隧道工程概况，经多方案比选，介绍了采用局部净化与全面通风方式相结合的方法，指出应用该方法来解决隧道施工环境的污染问题，能够取得较好的效果。     

Wind tunnel modelling as a means of predicting the response of chimmeys to vortex shedding

The limitations of wind tunnel testins, particularly for chimneys with a circular cross-section are discussed. The use of data from full-scale observations and wind tunnel tests at high Reynolds numbers in conjunction with suitable mathematical models are suggested to obtain wind load and wind response estimates that offer a higher level of reliability than wind tunnel estimates.     

电缆隧道消防PLC控制系统

以武钢第三炼钢厂电缆隧为例，介绍了中编程序控制器（ＰＬＣ）的消防自动控制系统的构成以及ＰＬＣ系统配置、通讯系统的软硬件设计特点，并预示电缆隧道消防系统发展的趋势。     

IPC-80亚、跨、超音速风洞弹丸及飞行器试验测试系统

本文主要介绍亚、跨、超音速风洞基本结构及气动原理,新配置的IPC-80测试系统。论述了弹丸及飞行器气动试验模拟信号处理、变换采样、数字量取真、模型迎角和阀位循环码读取方法,对标模动校作了测试精度考核。     

土工织物在洋河、桑干河导流工程上的应用

本文总结了在深覆盖层河床上建设土工织物布导流坝的规划、设计及施工方法，和土工织物的选择，并通过六个工程实例的实践，效果良好。可供有关工程参考     

Comparative analysis of sex-pheromone-response antagonists in three races of European corn borer

Behavioral responses of males from three New York races of European corn borer,Ostrinia nubilalis (Hübner), to various suspected sexpheromone-response antagonists were investigated with a flight tunnel protocol. Males from a bivoltine (Z) race and from a univoltine (Z) race utilizing a natural pheromone blend of 982 (Z)-(E)-11-tetradecenyl acetates and males from a bivoltine (E) race utilizing a 199 (Z)-(E)-11-tetradecenyl acetate ratio were flown to their natural blends and to blends containing 1 % of one of the following additional compounds: Z9–12OAc,E9–12OAc,Z9–14OAc, andE9–14OAc. In each race, the added components lowered significantly the number of individuals completing the behavioral sequence. The only exception was bivoltineE males flown to a blend withE9–12OAc added. The number completing the sequence in this case was statistically not significantly lower than the number that completed the sequence to the standard blend. In all three races, theZ9–14OAc produced the most dramatic reduction in completed flights, and in the univoltineZ race, this added component was significantly more effective in reducing completed flights than any other added component. The response to the Z9–14OAc is understandable given recently published findings of an electrophysiological study of single sensilla in the European corn borer.     

中子辐照对隧道二极管性能的影响

本文介绍了中子辐照环境中,隧道二极管性能的退化,即谷电流增加,峰谷比下降、摆幅电压减少。用二次隧道效应理论解释了这种退化过程。     

丹江口水库排沙清淤方法探讨

丹江口水库作为南水北调中线工程的源水库,延长其使用寿命、保证其长久良好地运行,不但有重要的经济意义,而且有更重要的社会意义。排沙清淤是保证丹江口水库能长期运用良好的重要措施。根据丹江口水库的自身特性,在变动回水区及其附近进行“防治型”排沙清淤是治理库区淤积泥沙的有效途径,与传统的坝前“治疗型”排沙清淤相比有许多优越之处。     

中国白银山隧道施工技术

白银山隧道全长390m,采用新奥法原理施工。利用光面爆破技术,Ⅲ类围岩全断面一次开挖,Ⅱ类围岩和断层破碎带半断面正台阶开挖。初期支护为锚喷及钢筋混凝土护拱,二次衬砌为模筑混凝土、洞内防排水采用复合式衬砌中间设聚氯乙烯薄膜结合纵向、环向育管及橡胶止水带的综合治理方案。对于特殊地质中的浅理、特浅理进洞的施工,坚持“护拱稳定边仰坡,大管棚注浆加固土体,浅打眼、弱爆破、强支护”的原则,做到安全进洞;对于断层破碎带,则采取了管棚注浆,超前锚杆预先加固围岩并结合钢格栅支撑等有力措施,顺利通过了不良地段。最后分析了浅理段荷载的计算,阐述了新奥法的岩体动态性质的力学概念。     

竖井式隧洞进水口衬砌的应用研究

竖井式进水口的钢筋砼衬砌可以通过打排水孔使外水内排,从而达到设计优化的目的。