Results 11 to 20 of about 141,507 (255)

Deformation failure characteristics and support technology of weakly cemented soft rock roadway under water spraying condition

open access: yesMeikuang Anquan, 2021
In order to study the reasonable support technology of weakly cemented soft rock roadway under water spraying condition, the 12307 return airway of Selian No.2 mine was taken as the background.
HAO Ming, PAN Xiahui, ZHANG Boyang
doaj   +1 more source

Study on Long-Term Dynamic Mechanical Properties and Degradation Law of Sandstone under Freeze-Thaw Cycle

open access: yesShock and Vibration, 2020
This study is based on the tunnel-face slope engineering of Dongfeng tunnel in Shanxi section of China’s Shuozhou-Huanghua Railway. The sandstone specimens in the perennial freeze-thaw zone of the slope were collected to carry out freeze-thaw cycle ...
Qingsong Pu   +6 more
doaj   +1 more source

Research on Actuation Behavior of Piezoelectric Fiber Composite

open access: yesTaiyuan Ligong Daxue xuebao, 2021
Macrofiber composite material (MFC) is a new type of high performance piezoelectric fiber composite material with great output and strong environmental adaptability.
Hao CHEN   +3 more
doaj   +1 more source

Application of Combining YOLO Models and 3D GPR Images in Road Detection and Maintenance

open access: yesRemote Sensing, 2021
Improving the detection efficiency and maintenance benefits is one of the greatest challenges in road testing and maintenance. To address this problem, this paper presents a method for combining the you only look once (YOLO) series with 3D ground ...
Zhen Liu   +5 more
doaj   +1 more source

Influence of expansion joint setting on the dynamic characteristics of curved bridges with unseating-prevention devices

open access: yes工程科学学报, 2015
A finite element model was built for a curve bridge with an unseating-prevention device. The collision effect of the curved bridge under rare earthquake was studied and the dynamic response mechanism was discussed based on this finite element mod-el. The
SONG Bo   +3 more
doaj   +1 more source

Methodology for development of drought Severity-Duration-Frequency (SDF) Curves [PDF]

open access: yes, 2014
Drought monitoring and early warning are essential elements impacting drought sensitive sectors such as primary production, industrial and consumptive water users.
Abdul Jamil, Muhammad Mahadi   +4 more
core   +2 more sources

Restoration of Road Pavement Depending on the Degree of Destruction of the Road

open access: yesNauka ta progres transportu, 2023
Purpose. The main purpose of this work is to develop a methodology for road pavement restoration depending on the degree of road destruction. Methodology.
O. F. Luzhytskyi   +3 more
doaj   +1 more source

Design and Preliminary Testing of Demand-Responsive Transverse Rumble Strips [PDF]

open access: yes, 2019
Transverse rumble strips are common practice to alert drivers by engaging their auditory and tactile senses in addition to visual senses by traffic signals.
Hossen, Md Shakhawat   +5 more
core   +2 more sources

Deformation Characteristics and Mechanical Mechanism of Collapse Accumulation Body After Coal Mine Disaster

open access: yesTaiyuan Ligong Daxue xuebao, 2021
After the occurrence of coal mine disaster, roadway collapse and accumulation often block the roadway and the rescue route. Under this condition, it is particularly difficult to excavate the rescue channel.
Guangbo CHEN   +5 more
doaj   +1 more source

Distant interaction of rock mass clusters around underground opening [PDF]

open access: yes, 2017
Purpose. To experimentally prove the fact of distant interaction between rock clusters during the irreversible displacements of rock mass. Disintegration of the rock mass does not necessarily imply loss in underground working stability.
Diedich, I   +3 more
core   +3 more sources

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