冲击压实技术在工程中的试验与研究

通过对机场工程飞行区路基处理的试验,从碾压后的沉降量、压实度及碾压工效等方面对冲击压实技术与振动碾压技术进行比较,并对冲击压实成果进行载荷、反应模量和回弹模量等试验,证明冲击压实技术较传统的碾压技术压实效果好、压实工效高、技术可行,是一种值得推广的大面积填筑压实技术．同时,给出了针对此工程的冲击压实施：[参数．     

基于GPS技术的压实度实时检测系统

为了解决道路压实度传统检测方法的滞后性、局限性等问题,提高道路质量和压实效率,通过传感技术采集振动压路机的振动信号,结合压路机加速度与道路压实度的理论关系,判断道路压实度情况。利用DGPS技术对压路机进行定位,获取压路机的地理位置;利用无线网络技术及时将压实度及其位置坐标捆绑式反馈给驾驶室或者质量监控中心。经过分析论证可知,提出的压实度检测方法能够迅速地检测道路压实度,避免了传统检测方法的盲目性和局限性。     

关于沥青混凝土的压实工艺的研究

在沥青混凝土道路施工中,对沥青混凝土必须进行压实,其目的是提高沥青混凝土混合料的强度、稳定性以及疲劳特性.所以压实质量的好坏直接影响到沥青路面的平整度、密实度.良好的路面质量最终要通过碾压来实现,因此必须重视压实工作,深入研究压实质量的控制技术.     

沥青混凝土的压实质量控制技术

沥青混凝土压实质量的好坏,将直接影响沥青路面的平整度和密实度.本文阐述了施工中控制路面压实质量的具体技术措施.在沥青混凝土道路施工中,对沥青混凝土必须进行压实,其目的是提高沥青混凝土混合料的强度、稳定性以及疲劳特性.所以压实质量的好坏直接影响到沥青路面的平整度、密实度.良好的路面质量最终要通过碾压来实现,因此必须重视压实工作,深入研究压实质量的控制技术.     

影响公路压实质量的各种因素控制

为了保证路堤的整体强度、稳定性和耐久性,公路路基施工中要求对路基进行压实,并满足一定的要求.本文通过影响公路压实效果的主要因素进行分析、研究,以确定科学的施工方法和施工工艺,以求在施工中得到最佳的压实效果.     

对路基压实度快速检测方法的探讨

针对由于路基用土最大干密度取值不当引起的路基压实度检测中出现的超实和压实不足现象,采用一种“压实度快速检测方法”,并对其理论原理、实际应用和误差分析进行阐述,说明其在实际施工中的可性行。     

压实非饱和土的模量与含水率关系分析(英文)

为了客观可靠地评价实际工程中路基压实土的工程性能,在路基填筑设计时考虑了道路实际服务期内气候变化对路基压实土性能的影响. 鉴于含水率测试方法简单且应用广泛,直接采用含水率代替吸力寻求压实非饱和土模量和含水率之间的联系. 采用非饱和土三轴仪对不同初始压实含水率和经历干湿过程后不同含水率土样进行常含水率三轴试验,分析了含水率和围压等对土体模量的影响规律. 研究结果表明: 土体含水率的增加会引起非饱和压实土体模量的降低,且在试验含水率范围内非饱和压实土体模量随含水率呈指数规律变化; 土体模量随围压的增大而增加,但含水率对模量的影响较围压对模量的影响更为显著. 该研究可为服务期内非饱和压实路基土的性能变化评价提供参考.     

冲击压实机冲击力及冲击能量的计算

冲击压实机广泛用于建筑行业．目前对具有特殊外形的冲击压实机冲击轮的动力特性研究的不多．根据冲量定理和动能定理，对冲击压实机的冲击力和冲击能进行研究．利用冲击轮的特殊外形，对地面产生大的冲击力和冲击能，通过理论计算，其结果与同吨位的振动压实机相比，冲击力提高十倍，冲击能效果明显，为压实机的设计及改进提供可靠的理论依据。     

公路施工振动压路机压实技术研究

在公路工程施工过程中,公路压实是非常重要的一个施工环节,对工程质量有比较大的影响。本文以实际工程为例,结合工程的实际情况合理的选择了压实设备,并对振动压路机的压实施工技术进行了分析,顺利完成了施工,取得了良好的施工效果,为类似工程借鉴和参考。     

对路基压实度快速检测方法的探讨

针对由于路基用土最大干密度取值不当引起的路基压实度检测中出现的超实和压实不足现象，采用一种“压实度快速检测方法”，并对其理论原理、实际应用和误差分析进行阐述，说明其在实际施工中的可性行。     

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.