隧道光面爆破施工关键技术

针对黔张常铁路大坡隧道工程断面大、掘进困难等问题,采用了光面爆破施工技术,为使爆破效果能够满足设计要求,对爆破参数、装药量及炮眼数量进行了理论计算,并在现场进行试验验证,总结了隧道光面爆破技术的关键施工工艺,该项技术成果可为类似工程施工提供经验借鉴,具有较高的工程应用价值.     

马岭头左隧道光面爆破设计与施工

根据公路隧道“新奥法”施工的需要，通过光面爆破试验，得出各种围岩的科学合理的光面爆破设计参数，形成了公路隧道开挖的光面爆破方案，提出了光面爆破的施工工序。控制欠超挖，确保初期支护和二衬厚度，降低工程成本，取得良好的效果。     

将军山隧道光面爆破技术与参数的选择

应用正台阶法开挖方法和微差、光面爆破技术,对将军山隧道掘进施工,通过合理选择爆破参数,减少了爆破对围岩的扰动,提高了隧道围岩的稳定性,控制了超欠挖量,加快了掘进速度,取得了理想的爆破效果。     

公路隧道新奥法施工技术探讨

新奥法施工是隧道工程的先进施工技术。简要介绍新奥法的发展过程和基本原理,从锚喷支护、监控量测、光面爆破和科学组织四个方面对新奥法施工要点进行探讨。     

公路隧道新奥法施工技术探讨

新奥法施工是隧道工程的先进施工技术。简要介绍新奥法的发展过程和基本原理，从锚喷支护、监控量测、光面爆破和科学组织四个方面对新奥法施工要点进行探讨。     

周边眼间距对深埋软岩隧道光爆效果影响的研究

结合深埋软岩隧道的光面爆破参数设计,通过计算分析周边眼间距理论值,得出了现场周边眼间距的适宜值,从而达到了以追求光面爆破理想效果实现现场施工安全质量经济最佳配合。     

光面爆破技术在湾坞供水隧洞施工中的应用

针对福安市湾坞供水工程隧洞爆破开挖长巷小断面、水工隧洞实施光面爆破开挖施工技术进行了讨论,从光面爆破施工方案、施工方法、质量保证、质量问题分析及处理、通风排水等方面做了介绍。     

光面爆破在高速隧道掘进中的应用研究

对昌宁高速隧道的设计施工以及光面爆破在掘进施工中的应用进行研究,在Ⅳ级围岩中使用正台阶光面爆破方法开挖断面安全可靠,通过光面爆破施工断面围岩稳定,扰动较小,保持原有的力学性质,光面爆破后的岩石表面按设计轮廓线成型,表面较平顺,超欠挖较少,掘进断面半孔率超过90%,施工进度及施工安全得到保障。     

双聚能预裂与光面爆破综合技术：经济社会效益双赢

自预裂（光面）爆破在我国采用以来,其钻孔工作量大和对保留岩体危害大成为制约该项技术发展的瓶颈。上世纪80年代末,科技工作者就不断尝试聚能预裂（光面）爆破试验研究以突破预裂（光面）爆破发展的瓶颈。但或因技术及工艺水平不佳而无法用于工程实践,或因结构复杂、价格高昂而难以在工程中推广应用,迄今为止也尚未发现聚能预裂（光面）爆破较为系统的权威理论研究成果。     

光面爆破技术在复杂地质隧洞开挖中的应用

根据勐野江水电站隧洞围岩岩体类别差异性大的特殊地质条件,采用工程类比和现场试验法,研究复杂地质条件下隧洞光面爆破的爆破参数、炮孔布置、装药结构、起爆网路、施工方案及处理措施.研究结果表明,在复杂地质条件下进行洞室开挖,只要选择正确的爆破参数和合理的施工方法也可以取得良好的爆破效果.     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.     

Improvement of one-cycle controller by use of proportional integral differential controller

1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…     

库克斯顿城堡

城堡, 是欧洲典型的建筑之一, 每个城堡都有一个美丽的传说或是一段历史。从本期开始, 我们将推出“城堡之旅”, 带各位读者去浏览、观赏欧洲各地的城堡, 开始一段文化与历史的旅途!     

The Reader Response Approach to Teaching of English Literature

During interview with English majors, it was found that a majority of students expressed disappointment with their experience of English literature classes. Students' dislike of learning English literature appears to be the major problem of teaching English literature in China. Reader response approach is a good way to solve this problem. In this paper, I explain the rationale behind the reader response approach, such as its origin, definition, features, assumptions, and strategies. Then I illustrate how reader response approach works as a teaching strategy by presenting several teaching models. At last I evaluate its usefuiness for teachers and present the advantages of reader response approach in Chinese context.