改性水玻璃浆液在粉细砂地层中注浆加固的应用

在合肥轨道交通2号线土建T J04标段的东一环路站到铜陵路站区间采用盾构接收施工的背景下,对复杂环境下采用改性水玻璃来注浆加固端头土体的关键技术进行阐释,准确分析盾构机在粉细砂层迸洞和出洞的注意事项和关键要点,这有利于施工人员针对性的施工,确保盾构机顺利进出洞.同时,这还能有效控制其对周边土质的影响,不致影响周边建筑的...     

工作面预注浆法治理矿井水灾害

根据山西团柏煤矿突水治理实例,简述工作面预注浆技术在矿井水灾害治理的应用,表述了实用的治理方案。     

On the fracture resistance of adhesively jointing structures

INTRODUCTION Adhesive bonding technology has been widely applied in modern structures in industries such as automotive, aerospace and in microelectronic device. The core idea of this technology is to bond two similar or dissimilar structure members with a thin continuous interface layer which can provide far better stress transfer across the interface than those traditional point-wise joining technologies such as spot welding, riveting and bolting. Furthermore, the damage tolerance proper…     

采用压密注浆技术处理公路软土路基沉降

对马鞍山湖西南路软土路基进行了稳定性分析及沉降计算 ,对不满足规范要求的路基 ,最后采用压密注浆技术进行工程处理。     

在"钻孔灌桩施工法"教学中如何培养学生的记忆力

记忆是学习的基础.本文介绍了用异同比较、相反相成比较及列表比较的方法增强学生理解记忆力的做法,并以“钻孔灌桩施工法“教学为例,阐述了该教法的实践和体会.     

在加拿大拦了市长的车

前不久,我和儿子去表姑家玩,表姑在加拿大维多利亚一所中文学校当老师。她带着我们游览了当地的海洋研究中心、博物馆和天文物理观察站。维多利亚市是加拿大不列颠哥伦比亚省的省会,位于加拿大西南的温哥华岛的南端,是温哥华岛上最大的城市和不冻港。     

桩端压力注浆补强大直径灌注问题桩案例研究

根据桩端压力注浆机理,对某工程大直径灌注问题桩进行补强处理.文章主要阐述了加固处理的程序,以及在处理过程中需要特别注意的某些质量控制环节,最后展示其试验检测结果.检测结果表明:桩端压力注浆可以有效地提高大直径灌注桩中的一些问题桩的单桩极限承载力;虽然很难确定其提高承载力幅度的具体数值,但仍不失为处理该类桩中问题桩的一种有效方法.     

高压旋喷技术在建筑工程中的应用

概述了高压旋喷技术的特点、工艺参数,并结合工程实例,说明高压旋喷技术的应用前景。提出对该项技术的一些建议和看法。     

工业电视监控系统在福建水口I升船机的应用探讨

工业电视监控系统是一种计算机控制的图像系统,经多次技术变革,已完全进入高科技领域．近年来．福建水口升船机工业电视监控系统通过技术改造,利用数字网络和计算机局域网技术的优势,形成了控制使捷的新一代网络视频系统,现结合该系统对工业电视监控系统应用进行初步探讨．     

桥梁基础工程中基于CPTu的粘性土不排水抗剪强度确定方法

为了给南京长江四桥基础工程设计与分析提供可靠的长江漫滩粘性土不排水抗剪强度Su参数,采用国外引进的孔压静力触探(CPTu)测试系统进行了现场原位试验,并以高质量土样的室内试验作为参考,对几种基于CPTu的Su确定方法进行了对比与评价,同时对所提出的圆锥系数Nk值进行了验证.试验结果表明:圆锥系数Nkt,Nke,N△u的...     

建构主义在ERP沙盘综合模拟实验教学中的应用研究

该文探讨了在建构主义教学理论指导下开展ERP沙盘综合模拟实验教学,通过对企业实际运作的模拟,使学生在参与中进行专业知识的学习,体验复杂、抽象的管理理论和决策方法在实践中的运用。教学实践证明,这是一种十分有效的经济管理专业实践教学方式,能有效地帮助学生强化专业知识学习、掌握管理技巧、锻炼分析和解决实际问题的能力,有助于培养学生的综合素质和创造能力,取得了良好的教学效果。     

Monotonic triaxial experiments to evaluate steady-state and liquefaction susceptibility of Babolsar sand

In this study, drained and undrained triaxial tests under isotropic and anisotropic consolidations were conducted on reconstituted samples of Babolsar sand, which underlies a densely populated, seismic region of the southern coast of the Caspian Sea, Mazandaran, Iran. It was demonstrated that the sand experienced all possible states of liquefiable soil： flow failure, limited flow, and dilation. The steady-state and flow liquefaction lines of this sand were presented and compared with previously tested sands. It is shown that the initial stress anisotropy can affect the potential of volume change and pore pressure generation. The steady-state line （SSL）, however, remains identical for the isotropically and anisotropically consolidated specimens under drained and undrained conditions. The tests data were then analyzed in order to investigate the liquefaction susceptibility of this sand in terms of parameters such as the state parameter, relative state parameter index, and lateral earth pressure ratio at failure.     

Using Technology in Education-Steps to the Future

No abstract available for this article.     

分光光度法测定碘酸钾碘盐中的碘

根据碘酸钾、碘化钾在酸性介质中与结晶紫形成稳定的离子缔合物,用四氯化碳萃取后,以分光光度法测定出食盐中碘酸钾的含量,再换算出碘的含量。实验表明:碘酸钾在0～10μg.ml-1范围内呈良好的线性关系,回归方程为A=0.08210C 0.0046,r=0.9999(n=5),ε=1.77×104L.mol-1.cm-1。本法与食品卫生标准检验方法测得的结果基本一致,方法简便、灵敏、准确,可用于食盐中碘的测定。     

Using pragmatism to develop didactics in Sweden

This paper reviews how pragmatism has been adopted as a systematic grounding for didactics in Sweden. The approach is action-oriented and emphasises the communicative activities that occur in educational settings. Four methodological components are described: (1) the empirical method of inquiry, the notions of (2) selective traditions and (3) organising purposes, and (4) practical epistemology analysis. Together, these tools can be employed for planning, assessing and analysing the choices teachers make regarding methods and the content of teaching. They have been purposely developed to support teaching and learning in terms of the interactions encountered by teachers in exercising their profession. The units of analysis concern activities and how they are conducive to the purposes of lessons.     

CAI课件运用困境的解决策略

对来自福建省的中小学包括进修校的教师进行调查访谈,并对教师在培训平台上的讨论[1]和提交的课件进行分析,针对CAI课件在课堂中运用的困境,提出解决困境的策略.