一洞双机TBM给排水设计和布置

针对某隧洞工程施工,阐述了一洞双机TBM施工中给排水的重要性,分析计算了给排水容量,并合理设计和布置了TBM供水和隧洞排水设施,进行了给排水系统操作分析,其目的是为TBM的快速、稳定掘进创造良好施工条件。     

引红济石输水隧洞工程TBM施工适应性初探

引红济石调水工程属省内的跨流域调水工程,输水隧洞长近20km,工程采用钻爆法与TBM联合施工方案,工程区地质条件极为复杂。突发性涌水、地质断裂带、长距离隧洞排水、通风、出渣等问题对采用TBM施工提出了特殊要求。应尽早对引红济石工程施工要求的TBM设备进行研究,为设备采购、制造作好前期技术支持。     

铁路山岭隧道穿越富水破碎带施工技术

铁路山岭深埋隧道穿越富水破碎带时，容易导致涌水、塌方，这是隧道施工的难题。以和邢铁路天河山隧道穿越富水破碎带时的工况作为研究对象，通过FLAC3D有限差分软件对不同施工工艺对比分析，最终选用最为合理的“台阶法开挖+喷锚、拱架等常规支护+管棚+小导管+注浆加固”综合施工技术。针对塌方体施工，采用早强性好、强度高的硫铝酸盐水泥砂浆进行帷幕注浆，实现快速固结、有效止水、防止继续塌方的目的，从而确保安全快速施工。     

大坡度、长坡身、中小断面水下隧道防排水施工技术研究

本文针对大坡度、长坡身、中小断面水下隧道防排水施工技术进行研究。通过对"防""堵""排"三个主要措施进行分析,对类似水下隧道防排水施工具有较强的指导意义,具有极强的推广价值。     

渗透性地层中隧道施工引起的地表沉降——以深圳地铁为例（英文）

目的:在城市地铁的建设过程中,地下水渗流对地表沉降存在较大影响。然而,渗透性地层中浅埋暗挖法施工的案例报道较少,地表沉降规律尚不明晰。本文以深圳地铁5号线和7号线重叠段工程为例,详细分析在渗流作用下浅埋暗挖法施工引起的地表沉降特征以及小导管注浆区和初支衬砌渗透性对地表沉降的影响,并进一步研究超前排水措施在沉降控制方面的作用。创新点:1.系统分析了富水渗透性地层中浅埋暗挖隧道施工引起的地表沉降的发展过程以及沉降特征;2.验证了三维流固耦合数值模型模拟富水环境下重叠隧道施工过程的可行性;3.研究了小导管注浆区、初支衬砌的渗透性和超前排水措施对地表沉降的影响。方法:1.结合隧道施工方案和地表沉降监测数据,分析渗流作用下的地表沉降特征(包括沉降影响范围、沉降槽宽度以及与拱顶沉降的关系等);2.通过三维流固耦合数值模型,研究小导管注浆区和初支衬砌渗透性对地表沉降以及地层孔压变化过程的影响;3.通过模拟掌子面前方水平排水孔,研究超前排水措施对掌子面稳定性和地表沉降发展的影响。结论:1.对于渗透性地层中的浅埋暗挖隧道工程,地下水渗流引起的固结效应是地表沉降量以及沉降范围大幅增长的主要原因。2.全断面注浆能够很好地控制地表沉降,而小导管注浆的效果则十分有限。3.降低小导管注浆区的渗透性,尤其是初支衬砌的渗透性,可以减少地层孔压的下降程度,进而降低地表沉降。4.打设超前水平排水孔可以显著提高掌子面稳定性,却对地表沉降影响有限;当无法进行全断面注浆时,推荐采取小导管注浆与超前排水相结合的方式施工。     

TB880E型掘进机换步要点

TB880E型掘进机的换步是TBM施工中的重要环节,对提高TBM掘进速度和施工质量起着重要的作用.通过实例对其要点作详细论述.     

TB880E型掘进机换步要点

TB880E型掘进机的换步是TBM施工中的重要环节,对提高TBM掘进速度和施工质量起着重要的作用。通过实例对其要点作详细论述。     

地铁车站高水位基坑降水及排水施工技术分析

为了探究地铁车站高水位基坑降水及排水施工技术,结合10号线东湖站水文地质实际情况及工程特点,利用管井井点及基坑外的排水沟和集水井分别进行降排水.结果表明:地下水的存在具有很强的客观性,难以有效避免地下水,但通过一系列降水和排水措施,能降低地下水对地铁车站施工质量造成的影响.高水位基坑降排水,施工难度更大,利用管井井点及基坑外的排水沟和集水井分别进行降排水,对整座车站结构的稳定性、质量、使用寿命、安全等皆有非常大的影响,值得施工单位高度重视.     

TBM掘进机在国内外隧洞工程中的应用

介绍并分析了国内外使用TBM机的现状,为以后类似的隧洞工程TBM施工积累经验和提供技术参考。     

隧道工程TBM装机的重难点及组装施工

为探析隧道工程TBM装机的重难点及组装施工的应用,结合工程实例,立足TBM装机重难点,分析了TBM组装施工以及调试的要点。分析得到：在隧道工程施工中,经常会用到TBM设备,但隧道空间有限,TBM装机难度比较大,需要结合隧道工程的实际情况,制定有效的组装施工方案,并加强调试,才能最大限上提升TBM的应用效果。     

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!     

胡主席在印度,我却在中国

Today, Sunday morning, I sit thinking and typing at my computer. My thoughts are in my homeland, India and my body is in China. The body is here and mind there for a good reason. Mr. Hu is president and I am resident and both are in each other's countries (what a difference the absence of one small letter makes!). Mr. Hu will return in a few days and I will stay on longer.