城区内道路上检查井施工的质量控制及安全措施

本文主要是分析城区内道路上检查井出现问题,产生的原因分别从设计方面、施工方面、管理方面来探究,采取有效措施减少这些问题的出现,来减少和避免安全事故的发生。     

排水检查井设计与施工质量控制

文章通过对现状排水检查井的病害及其成因分析研究,从设计和施工方面提出一些优化措施,以保证排水检查井设计施工质量,从而保障其功能正常发挥及行车安全。     

大同市街道改造中检查井施工技术探讨

本文结合大同市雁同西路的道路改造,从检查井基础设置、结构、施工工艺和井身材料四个方面分析了检查井周边路面开裂等产生的原因,提出加深基础埋置、改进井圈座结构、路面铺油与井圈提升同步施工及改革井身材料的四个技术措施来预防井口周边路面开裂的思路,可供设计及施工参考。     

机械顶管在龙子湖内环路污水工程中的应用研究

通过对比开槽排管、人工辅助顶管、机械顶管等相关施工工艺,合理、有效地解决了长久以来在地下水位较高的砂性土中进行超深排水管道施工的难题.阐述了机械顶管及检查井的施工技术要求,并在机械顶管工艺设计中提出了沉管式检查井新技术,解决了超长距离机械顶管同排水管道养护的矛盾.     

论给排水常见问题及对策

本文结合住宅小区室外排水的质量要求，从排水分干道设置、平坦地面的处理、不同设置标高问题、检查井中对流问题、施工质量问题五个方面分析了给排水常见问题及对策。     

浅析市政排水管道施工

随着我国经济的快速发展,城市建设离不开排水管道工程,排水管网的结构稳固和功能保障是城市排水安全的重要保证。本文结合市政管道的施工实践,从施工准备、管道检查井施工、试验及回填等方面,就市政明挖排水管道的施工进行了探讨。     

市政道路检查井井周路面沉陷分析及防治措施

通过引用公路工程中桥头跳车现象的产生机理,分析了市政道路中检查井周围路面沉陷、跳车的成因,探讨了在设计与施工过程中如何防止上述问题的发生.     

兰州市市政道路检查井周边路面质量缺陷及质量改进措施研究

检查井是市政道路和市政管网中的重要组成部分,对于城市管网的定期检查,清理疏通和检修维护具有重要意义。但是,市政道路检查井周边路面普遍出现了沉陷,开裂,甚至松散坑槽等病害,严重影响了行车安全性和舒适性以及市政道路外观的完整性和美观性。本文以兰州市市政道路外观检查为基础,分析检查井周边病害的主要类型,研究病害产生的原因,并提出相关的设计优化措施及施工质量控制要点。     

小城市市政排水管道工程质量通病分析及预防措

小城市市政排水管道工程质量的通病有四个方面的原因:1、管道积水2、管道渗漏5、检查井变形、下沉4、回填土沉陷.避免排水管道工程质量通病,可以采取以下措施:根据现有规划在施工中做好前期测量和设计工作,在设计中要反复对比研究,定出最佳方案,并严格按照施工规范施工,坚决杜绝不合格产品,克服不良人为因素,注重对整个施工过程实施有效的动态管理,严格人员、材料,设备的合理配置,控制各种试验及检测.     

浅析道路检查井井盖的沉降及周边道路质量通病的防治

通过对沥青混凝土路面检查井井盖和井周路面病害状况的分析，究其原因在于检查井井盖和周边路面的交通、材料、施工、养护和井盖质量等存在问题，从而提出解决道路检查井井盖的沉降及周边道路质量通病防治的措施。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that