Resource Type

Journal Article 254

Conference Videos 8

Year

2023 10

2022 8

2021 11

2020 8

2019 10

2018 16

2017 13

2016 8

2015 7

2014 7

2013 17

2012 14

2011 11

2010 19

2009 36

2008 15

2007 11

2006 6

2005 5

2004 6

open ︾

Keywords

experiment 18

tunnel 9

numerical simulation 7

simulation 7

shield tunnel 6

Bohai Strait 4

subsea tunnel 4

tunnel construction 4

underwater tunnel 3

“ 2

Bohai Strait tunnel 2

E” 2

EngineeringAchievements 2

Experiment 2

Karst tunnel 2

construction 2

construction technology 2

countermeasure 2

orthogonal experiment 2

open ︾

Search scope:

排序： Display mode:

Icing tunnel experimental study of the static pressure detector

Peng Youxin,Zheng Li,Lin Guiping

Strategic Study of CAE 2009, Volume 11, Issue 11,   Pages 51-55

Abstract: text-align: justify;">This work presented experimental approach of studying static pressure detector in an icingtunnel.The main topics are: the experimental items of the detector in the icing tunnel, the experimental conditionsand the calibrating parameters measured in the experiment.According to the features of the icing tunnel, the experimental results of the detector and some suggestion

Keywords： static pressure detector     icing tunnel experiment     anti-ice    

HTML PDF Collect

Simulation experiment of pumped sand on immersed tunnel

Zheng Aiyuan,Tan Zhongsheng,Li Zhiguo

Strategic Study of CAE 2009, Volume 11, Issue 7,   Pages 81-85

Abstract: parameters of immersed tunnel are researched., experiment process, important points for attention and the technical requirements.A large of the immediate data is obtained by the experiment.On the basis of analyzing test results, the main original parameters on construction of the immersed tunnelof immersed tunnel.

Keywords： immersed tunnel     foundation pumped sand     simulation experiment    

HTML PDF Collect

Impacts of de-icing salt pollution on urban road greenspace: a case study of Beijing

Zhouyuan LI,Yingmei LIANG,Junhui ZHOU,Xiao SUN

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 5,   Pages 747-756 doi: 10.1007/s11783-014-0644-2

Abstract: De-icing salt contamination of urban soil and greenspace has been a common issue of concern in many countriesthe 2009/2010 winter, Beijing experienced a contamination accident resulting from the overuse of de-icinginjury level showed that the trees like a, , and the shrubs like , showed less tolerance to de-icing

Keywords： de-icing salt     environmental impact assessment     urban ecology     greenspace    

HTML PDF Collect

Design and experiment of a novel pneumatic soft arm based on a deployable origami exoskeleton

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 4, doi: 10.1007/s11465-023-0770-2

Abstract: Soft arms have shown great application potential because of their flexibility and compliance in unstructured environments. However, soft arms made from soft materials exhibit limited cargo-loading capacity, which restricts their ability to manipulate objects. In this research, a novel soft arm was developed by coupling a rigid origami exoskeleton with soft airbags. The joint module of the soft arm was composed of a deployable origami exoskeleton and three soft airbags. The motion and load performance of the soft arm of the eight-joint module was tested. The developed soft arm withstood at least 5 kg of load during extension, contraction, and bending motions; exhibited bistable characteristics in both fully contracted and fully extended states; and achieved a bending angle of more than 240° and a contraction ratio of more than 300%. In addition, the high extension, contraction, bending, and torsional stiffnesses of the soft arm were experimentally demonstrated. A kinematic-based trajectory planning of the soft arm was performed to evaluate its error in repetitive motion. This work will provide new design ideas and methods for flexible manipulation applications of soft arms.

Keywords： pneumatic soft arm     soft airbag     deployable origami exoskeleton     bistable characteristics     cargo-loading capacity    

HTML PDF Collect

Research on Demarcating Method for Deep Tunnel and Shallow Tunnel in Soil

Zhao Zhanchang,Xie Yongli

Strategic Study of CAE 2005, Volume 7, Issue 10,   Pages 84-86

Abstract:

Directed against the demarcating problems of deep tunnel and shallow tunnel in exiting methods, thefeasible by two engineering cases, and is of importantce to lining design and construction of soil tunnel

Keywords： soil tunnel     deep tunnel and shallow tunnel     demarcating method    

HTML PDF Collect

Atmospheric heterogeneous reaction of chlorobenzene on mineral -FeO particulates: a chamber experiment

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 11, doi: 10.1007/s11783-023-1734-9

Abstract:

● Photochemical conversion of chlorobenzene (CB) on α-Fe2O3 was evaluated.

Keywords： Photochemical conversion     Chlorobenzene     α-Fe2O3     PCDD/Fs     Mineral particulate    

HTML PDF Collect

Biaxial tensile-compressive experiment of concrete at high temperatures

SONG Yupu, ZHANG Zhong, QING Likun, YU Changjiang

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 1,   Pages 94-98 doi: 10.1007/s11709-007-0009-z

Abstract: Biaxial tension-compression experiments of concrete of five stress ratios at high temperatures were carried out using the large static-dynamic triaxial test system in the State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology. The stress ratios s1/s3 are 0, 0.1, 0.25, 0.50, and 0.75. The temperatures are 20vH, 200vH, 300vH, 500vH, 600vH. The mechanical behavior of concrete under biaxial tension-compression at high temperatures is analyzed. It is found that both the tensile strength and strain diminished with the increase in temperature under each stress ratio. Based on the test results, the relationship between tensile strengths and stress ratios and temperature is proposed. In addition, the failure criterion of concrete under biaxial stress state of tension-compression at high temperatures is established.

Keywords： increase     Offshore Engineering     temperature     relationship     addition    

HTML PDF Collect

Effect of cutterhead configuration on tunnel face stability during shield machine maintenance outages

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 4,   Pages 522-532 doi: 10.1007/s11709-023-0930-9

Abstract: Engineering safety during maintenance outages is determined by the stability of the tunnel face.The tunnel face is supported by a medium at the bottom of the excavation chamber and compressed air atDisregarding the supporting effect of the cutterhead will result in a tunnel face with underestimated

Keywords： tunnel face stability     cutterhead configuration     aperture ratio     pressure gradient     support ratio    

HTML PDF Collect

Numerical simulation and experiment research of radiation performance in a dish solar collector system

Yong SHUAI, Xinlin XIA, Heping TAN

Frontiers in Energy 2010, Volume 4, Issue 4,   Pages 488-495 doi: 10.1007/s11708-010-0007-z

Abstract: The Monte Carlo ray-tracing method is applied and coupled with optical properties to predict the radiation performance of solar concentrator/cavity receiver systems. Several different cavity geometries are compared on the radiation performance. A flux density distribution measurement system for dish parabolic concentrators is developed. The contours of the flux distribution for target placements at different distances from the dish vertex of a solar concentrator are taken by using an indirect method with a Lambert and a charge coupled device (CCD) camera. Further, the measured flux distributions are compared with a Monte Carlo-predicted distribution. The results can be a valuable reference for the design and assemblage of the solar collector system.

Keywords： Monte Carlo method     solar energy     radiation performance     cavity receiver    

HTML PDF Collect

Centrifuge experiment and numerical analysis of an air-backed plate subjected to underwater shock loading

Zhijie HUANG, Xiaodan REN, Zuyu CHEN, Daosheng LING

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 6,   Pages 1350-1362 doi: 10.1007/s11709-019-0559-x

Abstract: In this study, systematic centrifuge experiments and numerical studies are conducted to investigate the effect of shock loads due to an underwater explosion on the dynamic responses of an air-backed steel plate. Numerical simulations with three different models of pressure time history generated by underwater explosion were carried out. The first model of pressure time history was measured in test. The second model to predict the time history of shock wave pressure from an underwater explosion was created by Cole in 1948. Coefficients of Cole’s formulas are determined experimentally. The third model was developed by Zamyshlyaev and Yakovlev in 1973. All of them are implemented into the numerical model to calculate the shock responses of the plate. Simulated peak strains obtained from the three models are compared with the experimental results, yielding average relative differences of 21.39%, 45.73%, and 13.92%, respectively. The Russell error technique is used to quantitatively analyze the correlation between the numerical and experimental results. Quantitative analysis shows that the simulated strains for most measurement points on the steel plate are acceptable. By changing the scaled distances, different shock impulses were obtained and exerted on the steel plate. Systematic numerical studies are performed to investigate the effect of the accumulated shock impulse on the peak strains. The numerical and experimental results suggest that the peak strains are strongly dependent on the accumulated shock impulse.

Keywords： underwater explosion     centrifuge experiment     shock load     dynamic response     accumulated shock impulse    

HTML PDF Collect

Parameter for judging reactivity of coal and coke

HE Hongzhou, LUO Zhongyang, CEN Kefa

Frontiers in Energy 2008, Volume 2, Issue 3,   Pages 354-358 doi: 10.1007/s11708-008-0052-z

Abstract: as the quotient of the maximum weight loss rate in non-isothermal thermogravimetric analysis (TGA) experimentThe heating rate selected in TGA experiment has no effect on the judgment.

Keywords： thermogravimetric analysis     specific maximum     different lithotype     experiment     TGA experiment    

HTML PDF Collect

Bending failure performance of a shield tunnel segment based on full-scale test and numerical analysis

Frontiers of Structural and Civil Engineering   Pages 1033-1046 doi: 10.1007/s11709-023-0973-y

Abstract: This study focuses on the bending failure performance of a shield tunnel segment.

Keywords： shield tunnel     bearing capacity     failure mechanism     segment reinforcement    

HTML PDF Collect

Discontinuous mechanical behaviors of existing shield tunnel with stiffness reduction at longitudinal

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 1,   Pages 37-52 doi: 10.1007/s11709-022-0920-3

Abstract: analytical model is proposed to estimate the discontinuous mechanical behavior of an existing shield tunnelabove a new tunnel.The existing shield tunnel is regarded as a Timoshenko beam with longitudinal joints.Timoshenko beam GA, and different additional pressure profiles on the responses of the shield tunnel

Keywords： tunnel–soil interaction     discontinuous analysis     longitudinal joints     existing shield tunnel     Timoshenko    

HTML PDF Collect

A real-life stability model for a large shield-driven tunnel in heterogeneous soft soils

Xinyu HU, Zixin ZHANG, Scott KIEFFER

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 2,   Pages 176-187 doi: 10.1007/s11709-012-0149-7

Abstract: The current models that have been published to date only allow for homogeneous soil at the tunnel faceThis paper presents a real-life face stability model to determine the minimal pressure needed at the tunnelface for a large shield-driven tunnel in heterogeneous soft soils.are conducted, and the effects of the involved parameters for a large, multilayered, shield-driven tunnel

Keywords： analytical solution     shield-driven tunnel     multilayered soil     face stability    

HTML PDF Collect

How did Archimedes discover the law of buoyancy by experiment?

Hidetaka KUROKI

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 1,   Pages 26-32 doi: 10.1007/s11465-016-0368-z

Abstract: Through these measurements, he reached the discovery of the law of buoyancy directly by experiment.

Keywords： Archimedes’ principle     buoyancy     specific gravity     Eureka     Vitruvius     displaced water     balance     floating body    

HTML PDF Collect

Title Author Date Type Operation

Icing tunnel experimental study of the static pressure detector

Peng Youxin,Zheng Li,Lin Guiping

Journal Article

Simulation experiment of pumped sand on immersed tunnel

Zheng Aiyuan,Tan Zhongsheng,Li Zhiguo

Journal Article

Impacts of de-icing salt pollution on urban road greenspace: a case study of Beijing

Zhouyuan LI,Yingmei LIANG,Junhui ZHOU,Xiao SUN

Journal Article

Design and experiment of a novel pneumatic soft arm based on a deployable origami exoskeleton

Journal Article

Research on Demarcating Method for Deep Tunnel and Shallow Tunnel in Soil

Zhao Zhanchang,Xie Yongli

Journal Article

Atmospheric heterogeneous reaction of chlorobenzene on mineral -FeO particulates: a chamber experiment

Journal Article

Biaxial tensile-compressive experiment of concrete at high temperatures

SONG Yupu, ZHANG Zhong, QING Likun, YU Changjiang

Journal Article

Effect of cutterhead configuration on tunnel face stability during shield machine maintenance outages

Journal Article

Numerical simulation and experiment research of radiation performance in a dish solar collector system

Yong SHUAI, Xinlin XIA, Heping TAN

Journal Article

Centrifuge experiment and numerical analysis of an air-backed plate subjected to underwater shock loading

Zhijie HUANG, Xiaodan REN, Zuyu CHEN, Daosheng LING

Journal Article

Parameter for judging reactivity of coal and coke

HE Hongzhou, LUO Zhongyang, CEN Kefa

Journal Article

Bending failure performance of a shield tunnel segment based on full-scale test and numerical analysis

Journal Article

Discontinuous mechanical behaviors of existing shield tunnel with stiffness reduction at longitudinal

Journal Article

A real-life stability model for a large shield-driven tunnel in heterogeneous soft soils

Xinyu HU, Zixin ZHANG, Scott KIEFFER

Journal Article

How did Archimedes discover the law of buoyancy by experiment?

Hidetaka KUROKI

Journal Article