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堆石混凝土坝概述及下一代混凝土坝施工技术展望 Review
Feng Jin, Duruo Huang, Michel Lino, Hu Zhou
《工程(英文)》 2024年 第32卷 第1期 页码 100-106 doi: 10.1016/j.eng.2023.09.020
Over the past few decades, one of the most significant advances in dam construction has been the invention of the rock-filled concrete (RFC) dam, which is constructed by pouring high-performance selfcompacting concrete (HSCC) to fill the voids in preplaced large rocks. The innovative use of large rocks in dam construction provides engineers with a material that requires less cement consumption and hydration heat while enhancing construction efficiency and environmental friendliness. However, two fundamental scientific issues related to RFC need to be addressed: namely, the pouring compactness and the effect of large rocks on the mechanical and physical properties of RFC. This article provides a timely review of fundamental research and innovations in the design, construction, and quality control of RFC dams. Prospects for next-generation concrete dams are discussed from the perspectives of environmental
friendliness, intrinsic safety, and labor savings.
关键词: Rock-filled concrete dam Pouring compactness Effect of large rocks Intelligent quality control Unmanned dam construction
Strategic Guidance Effect of Large-Scale Construction Enterprise Growth to Programme Contracting
Feng Guo,Yi-qi Chen,Yi-qing Cai
《工程管理前沿(英文)》 2016年 第3卷 第3期 页码 246-251 doi: 10.15302/J-FEM-2016034
关键词: large-scale construction enterprise enterprise growth programme contracting strategic interaction
Diego Maria BARBIERI, Inge HOFF, Chun-Hsing HO
《结构与土木工程前沿(英文)》 2021年 第15卷 第2期 页码 412-424 doi: 10.1007/s11709-021-0700-5
关键词: organosilane lignosulfonate crushed rocks pavement unbound layers repeated load triaxial test finite element analysis
Yuji CHEN, Qizhi LUO,
《结构与土木工程前沿(英文)》 2009年 第3卷 第4期 页码 352-356 doi: 10.1007/s11709-009-0057-7
关键词: thin-walled box girder with variable cross-sections potential variational theory shear lag large deflection problem
Trauma-induced “Macklin effect” with pneumothorax and large pneumomediastinum, disguised by allergy
null
《医学前沿(英文)》 2013年 第7卷 第3期 页码 386-388 doi: 10.1007/s11684-013-0278-y
A 56-year-old man presented spontaneously to the Emergency Department complaining of facial and neck oedema after assumption of nonsteroidal anti-inflammatory drugs (NSAIDS). The triage nurse assigned the patient to Accident & Emergency (A&E) doctor as probable allergic reaction to NSAIDS. Chest X-ray (CXR), ordered after 24 hours, revealed a huge subcutaneous chest and neck emphysema without clearly visible pneumothorax. Subsequent chest CT scan showed a small left pneumothorax and a large amount of air in the mediastinum. The patient was conservatively treated since he was eupnoeic and hemodynamically stable. The pathophysiology of pneumomediastinum was first described by Macklin in 1939. The Macklin effect involves alveolar ruptures with air dissection along bronchovascular sheaths to the mediastinum. In this case the patient did not report in his history a recent blunt thoracic trauma and the initial suspicion of an allergic reaction has prevented physicians to immediately achieve the correct diagnosis.
关键词: thoracic trauma differential diagnosis critical care pneumothorax pneumomediastinum CT scan pitfalls lung and airways physiology
Xiang LI, Wenzheng ZHANG, Zhong HUANG, Dehao JU, Li HUANG, Mingzhi FENG, Xingcai LU, Zhen HUANG
《能源前沿(英文)》 2019年 第13卷 第3期 页码 483-493 doi: 10.1007/s11708-019-0631-1
关键词: marine engine natural gas methane turbulent jet ignition (TJI) pre-chamber
石龙,张瑞芳, 谢启源,付丽华
《中国工程科学》 2008年 第10卷 第11期 页码 37-42
以大空间展厅为例,利用火源辐射模型和烟气辐射模型并结合CFAST6.0区域模拟软件的计算结果,对比分析了大空间内不同着火位置下火灾增长的情况。研究结果表明仅考虑火源热辐射的情况下,展厅内着火位置越处于左右中间对称处,其火灾增长越快,热释放速率峰值也越大,达到热释放速率峰值的时间和火灾的持续时间越短,处于展厅中心位置时所有值达峰值。对火源热辐射和烟气辐射综合考虑时,到达热释放速率峰值时间与火灾持续时间的规律同仅考虑火源辐射模型时一致,但热释放速率峰值均有不同程度的提高。
Large deflection behavior effect in reinforced concrete columns exposed to extreme dynamic loads
Masoud ABEDINI, Azrul A. MUTALIB, Chunwei ZHANG, Javad MEHRMASHHADI, Sudharshan Naidu RAMAN, Roozbeh ALIPOUR, Tohid MOMENI, Mohamed H. MUSSA
《结构与土木工程前沿(英文)》 2020年 第14卷 第2期 页码 532-553 doi: 10.1007/s11709-020-0604-9
曾小苹,郑吉盎 , 王曌燚 , 张素琴 , 林云芳
《中国工程科学》 2011年 第13卷 第4期 页码 48-53
对地磁记录分析的结果显示,大地震前强烈的地磁异常现象反复出现;在震中附近极震区临震前36 h至十几分钟,地磁场的特大异常数值随震级增大而增大。归算到距震中1 km处,Ms=6.0~9.5 级破坏性地震的磁场异常值约为102~105 nT,异常强度甚至超过地球磁场量级5.5×104 nT。根据其强度特性及时空分布,这种临震前在震中附近的ULF磁场异常,表现为一种“磁间隙喷发”。由此地磁异常的特性,提出利用大地震前短临地磁异常作为预警信号进行防震预警的探讨,由地磁预警突破目前地震预测预报难的现实困境,有望收到
Features of seismic hazard in large dam projects and strong motion monitoring of large dams
Martin WIELAND,
《结构与土木工程前沿(英文)》 2010年 第4卷 第1期 页码 56-64 doi: 10.1007/s11709-010-0005-6
关键词: seismic hazard arch dam concrete face rockfill dam strong motion instrumentation reservoir-triggered seismicity Wenchuan earthquake
王占江,蔡宗义,郑学锋,朱玉荣
《中国工程科学》 2009年 第11卷 第4期 页码 46-49
为研究水中爆炸对围岩的增耦,在一个直径1.6 m的水泥砂浆半球体装置上,将其中心预留的直径0.3 m的腔室内注水和置入水泥砂浆芯体,对比性地进行了一系列的1.00 g TNT (2,4,6—三硝基甲苯)当量的填实和空腔爆炸实验。水泥砂浆球表运动测量数据表明,与水泥砂浆中的空腔解耦相比,水中空腔爆炸的解耦效果较差,尤其水腔中爆炸可大大增强爆炸能量的耦合。可以推断,水下爆炸会明显增强围岩中的爆炸应力波强度,近水域中的空中爆炸也可能会增强围岩中的爆炸能耦合,因而相对于围岩和堤坝中同距离、同药量的爆炸来讲,所引起
Design and realization of a remote monitoring and diagnosis and prediction system for large rotating
Shaohong WANG, Tao CHEN, Jianghong SUN
《机械工程前沿(英文)》 2010年 第5卷 第2期 页码 165-170 doi: 10.1007/s11465-009-0090-1
关键词: large rotating machinery remote monitoring fault diagnosis prediction system
Highlights for special issue on “Large Animal Stem Cells”
Jianyong HAN
《农业科学与工程前沿(英文)》 2019年 第6卷 第1期 页码 1-2 doi: 10.15302/J-FASE-2019251
汪双杰,金龙,穆柯,朱东鹏,陈冬根,董元宏
《中国工程科学》 2017年 第19卷 第6期 页码 140-146 doi: 10.15302/J-SSCAE-2017.06.020
本文分析了青藏公路60多年来的历次改建及病害资料,以道路病害率为依据将青藏公路分为稳定区、基本稳定区、不稳定区和极不稳定区;选取了134 km典型病害路段,分析年平均地温、冻土上限退化速率、含冰量与道路病害关系,确定各因素影响下道路的平均使用年限;研究热棒、片块石、保温板、通风管路基处治效果,以及各处治措施实施后引发的新工程病害,分析新生病害的时间效应,并介绍了弥散式通风路基、单向导热板路基和路基路面一体化散热结构等适用于大尺度冻土路基的新型稳定技术。研究结果表明:年平均地温、冻土上限退化速率、含冰量等因素与道路使用寿命均为负相关关系,在各类处治措施中,热棒、片块石、保温板、通风管加片块石对病害预防的有效率较高。
标题 作者 时间 类型 操作
Strategic Guidance Effect of Large-Scale Construction Enterprise Growth to Programme Contracting
Feng Guo,Yi-qi Chen,Yi-qing Cai
期刊论文
Crushed rocks stabilized with organosilane and lignosulfonate in pavement unbound layers: Repeated load
Diego Maria BARBIERI, Inge HOFF, Chun-Hsing HO
期刊论文
Mechanics analysis of thin-walled box continuous girder with variable cross-sections in considering effectof large deflection and shear lag
Yuji CHEN, Qizhi LUO,
期刊论文
Trauma-induced “Macklin effect” with pneumothorax and large pneumomediastinum, disguised by allergy
null
期刊论文
Pre-chamber turbulent jet ignition of methane/air mixtures with multiple orifices in a large bore constantvolume chamber: effect of air-fuel equivalence ratio and pre-mixed pressure
Xiang LI, Wenzheng ZHANG, Zhong HUANG, Dehao JU, Li HUANG, Mingzhi FENG, Xingcai LU, Zhen HUANG
期刊论文
Large deflection behavior effect in reinforced concrete columns exposed to extreme dynamic loads
Masoud ABEDINI, Azrul A. MUTALIB, Chunwei ZHANG, Javad MEHRMASHHADI, Sudharshan Naidu RAMAN, Roozbeh ALIPOUR, Tohid MOMENI, Mohamed H. MUSSA
期刊论文
Features of seismic hazard in large dam projects and strong motion monitoring of large dams
Martin WIELAND,
期刊论文
Design and realization of a remote monitoring and diagnosis and prediction system for large rotating
Shaohong WANG, Tao CHEN, Jianghong SUN
期刊论文