Results 71 to 80 of about 3,185 (251)

Study on preparation method of model soft soil based on soil physical and mechanical tests

Yantu gongcheng xuebao
Soft soil has the characteristics of low strength, large susceptibility to disturbance, high compressibility and sensitivity. Undisturbed soft soil is often faced with the problems of difficult sampling, difficult preservation and transportation, which ...
LI Ping 1, 2, 4, ZHAO Zihan 1, 2, LIN Mingyuan 3, CHEN Yuxin 4
doaj   +1 more source

Carbon emission assessment of tunnel infrastructures: From construction to operation

Deep Underground Science and Engineering, EarlyView.
This study develops a lifecycle carbon accounting framework for tunnel infrastructures, covering design, construction, operation, maintenance, and dismantling. Applied to a subsea tunnel case, the framework reveals the carbon emission distribution among four typical tunnel types and highlights potential carbon offset methods for low‐carbon tunnel ...
Luyuan Long, Wout Broere, Xuehui Zhang, Tian Xia, Richard de Nijs   +4 more
wiley   +1 more source

2018年吉林松原MS5.7地震电离层TEC异常分析

Dizhen xuebao
利用美国喷气动力实验室（JPL）提供的全球电离层总电子含量（TEC）网格数据分析2018年5月28日吉林松原MS5.7地震空间电磁异常情况。通过算法对比确定滑动四分位法的优势，并利用该方法计算此次地震从震前14天至震后6天的电离层TEC异常变化的时间序列，结合空间环境和ΔTEC异常二维空间分布情况进一步分析，结果显示：① 极区磁亚爆强烈时段越靠近北部电离层扰动越强烈；② 震前TEC观测值先增大后减小，震后又回升，电离层异常幅度随着震中距的减小而增大；③ 电离层在空间分布上 ...
Hua Nian, Jiye Li, Longchen Ma, Lanbin Hu, Yongsheng Li, Yanli Ma, Feng Gao   +6 more
doaj   +1 more source

Investigation on tunnel stability considering pipe‐roof support with transparent soil technology

Deep Underground Science and Engineering, EarlyView.
This study integrates transparent soil technology, 3D reconstruction and numerical simulation to captures the full‐field deformation of shield tunnel instability. Results demonstrate that pipe‐roof support enhances stability via the “soil‐arching barrier effect,” effectively restraining failure wedge development by extending stress transfer paths ...
Zhi Jia, Yunpeng Ji, Zhao Lu, Honghua Zhao, Limin Zhang   +4 more
wiley   +1 more source

Experimental and smoothed particle hydrodynamics‐finite element method simulation investigation of synergistic erosion mechanism of gangue‐based abrasive water jets

Deep Underground Science and Engineering, EarlyView.
This study proposes an eco‐friendly coal permeability enhancement technique by utilizing mine waste gangue as an abrasive in high‐pressure water jets. Integrating erosion experiments with smoothed particle hydrodynamics‐finite element method coupled simulations, the research study elucidates the flow field dynamics and a nonlinear solid–liquid ...
Qingxiang Wang, Jiaxu Tang, Qiheng Ren, Ding Wang, Tong Wang   +4 more
wiley   +1 more source

Mechanism of “seesaw‐type” rock burst in coal seam mining beneath mountainous areas

Deep Underground Science and Engineering, EarlyView.
This study reveals the mechanism of “seesaw‐type” rock bursts during coal mining beneath mountainous areas. The advancing working face induces nonuniform fracturing of the overburden. The detached mountain mass then undergoes a seesaw‐type rotational movement around a shifting pivot, driving the primary fracture through a characteristic “open‐close ...
Chao Zhou, Xueqiu He, Zhenlei Li, Ping Wang, Dazhao Song, Fuxing Jiang, Shan Yin, Anliang Lü, Menghan Wei, Taoping Zhong   +9 more
wiley   +1 more source

Probabilistic characterization of seepage‐induced tunnel face failure via a two‐phase double‐point material point method

Deep Underground Science and Engineering, EarlyView.
To address seepage‐induced tunnel face collapse, this study develops a two‐phase double‐point MPM framework to capture large‐deformation hydro‐mechanical interactions. Incorporating a cementation‐based constitutive model with dynamic permeability updates, the model is successfully validated against saturated granular‐column collapse experiments ...
Yue Tong, Mingliang Zhou, Jie Xu, Zeyu Li, Yisheng Zhao, Jin An, Hongwei Huang   +6 more
wiley   +1 more source

Rapid estimation of MS6.0 scenario earthquake acceleration waveform and its destructive capacity in local area based on the MS4.7 earthquake in Anhui Province

地球与行星物理论评
On September 18, 2024, the MS4.7 earthquake occurred in Hefei, Anhui Province, causing certain building damage and social panic. This was the largest earthquake of magnitude to occur in the Hefei area in 2024.
Zongchao Li, Zhiwei Ji, Jize Sun, Kun Chen, Junju Xie   +4 more
doaj   +1 more source

Building disaster-resilient communities and economies [PDF]

, 2014
Executive summary The need for building resilience Natural hazards have the potential to devastate communities and economies around the world. Natural hazards are inevitable, but not natural disasters.
United Nations Environment Programme
core  

Energy evolution‐based damage quantification and failure prediction of fault zone tunnel lining concrete: A novel acoustic emission–strain energy coupling approach

Deep Underground Science and Engineering, EarlyView.
This study investigates the damage evolution and failure mechanisms of tunnel lining concrete in active fault zones through uniaxial compression tests integrated with acoustic emission (AE) monitoring. A strong linear correlation is identified between the AE cumulative absolute energy and the total strain energy, providing a reliable energy‐based ...
Shuaida Zhu, Dongming Zhang, Mingliang Zhou, Shengjun Duo, Hongwei Huang   +4 more
wiley   +1 more source