Results 71 to 80 of about 248,542 (278)

MODERN CONSTRUCTIONS OF UNDERGROUND SUBWAY TUNNELS

, 2021
In this article, the results of the study of modern designs of underground subway tunnels are recommended to work on the model of modern constructions of underground subway tunnels from developed countries. According to the results of the conducted experimental-theoretical research, it is necessary to implement the modern construction of underground ...
Mamatqulov Jasur Ziyadullayevich, Eshniyazov Nodir Nurmamatovich   +1 more
openaire   +2 more sources

Semi‐analytical solution for the stability of deep vertical shaft considering time‐dependent rock‐structure interaction

Deep Underground Science and Engineering, EarlyView.
A novel cavity contraction solution and multilayer shaft wall model were developed to analyze deep shaft stability, considering rock viscosity, support structures, and water pressure, with successful validation through a Hulusu Coal Mine case study.
Bin Chen, Pinqiang Mo, Zhao Lu, Lianfei Kuang, Qiang Zhang, Abolfazl Eslami   +5 more
wiley   +1 more source

Caving‐enhanced geothermal system overwhelms fracturing‐ and pipe‐enhanced geothermal system in heat extraction

Deep Underground Science and Engineering, EarlyView.
Our study reveals that caving‐enhanced geothermal systems (C‐EGS) with adequately fractured reservoirs achieve optimal heat extraction by minimizing preferential flow paths, while conventional fracturing (F‐EGS) and pipe‐based (P‐EGS) systems suffer accelerated thermal drawdown.
Fangchao Kang, Tianjiao Li, Yingchun Li, Jinlong Men, Chun'an Tang   +4 more
wiley   +1 more source

The Influence of the Construction of the Bridge Pile Foundation on the Adjacent Operating Subway Tunnel Considering the Creep Characteristics of the Stratum

Buildings
The pile foundation construction adjacent to an operational subway tunnel can induce the creep effects of the surrounding soil of the tunnel, resulting in the deformation of the existing tunnel lining and potentially compromising the safe operation of ...
Dandan Wu, Wentian Cui
doaj   +1 more source

Measurement of Tunnel Clearance Convergence Using Mobile Laser Detection Technology

Canadian Journal of Remote Sensing, 2021
Railway and subway tunnels have lengthy runs, long train operation times, high detection pressures, and critical structural safety concerns that affect tunnel service life, train safety, and passenger comfort.
Zeyu Yue, Haili Sun, Ruofei Zhong, Haizhi Ma, Zhengwen Xu, Francis Elliott   +5 more
doaj   +1 more source

Control Standard of Ground Surface Settlement Induced by Running Tunnel Construction in Beijing Subway

, 2011
Ground settlement, especially the ground surface settlement induced by subway tunneling is an important issue. However, there is no an agreed standard for controlling ground surface settlement during the subway construction at present.
Cheng Ping Zhang, He Li, Jian Chen Wang, Li Min Li   +3 more
core   +1 more source

Causes of Delay in the Construction Projects of Subway Tunnel

, 2020
The constructions of urban infrastructure are an important sector that provides remarkable ingredients for the economic development of modern cities. However, a large number of transportation infrastructure construction projects are delayed; therefore ...
Hang Zhang, Dingbang Zhang, Tao Cheng
core   +1 more source

A rock brittleness index based on the postpeak energy release rate and damage surface characteristics for brittle hard rock

Deep Underground Science and Engineering, EarlyView.
This study examines energy evolution in rock rupture via triaxial direct shear tests, exploring the impact of confining pressure and temperature on fracture surface randomness. A novel energy‐based brittleness index is proposed, validated experimentally, and compared with existing methods for reliability and accuracy.
Biao Wang, Zaobao Liu, Jing Xue, Bo Lu, Wei Zeng, Dengke Zhang   +5 more
wiley   +1 more source

Instability mechanism and failure characteristics of underground cavern in block system under the action of seismic waves

Deep Underground Science and Engineering, EarlyView.
Seismic waves with tensile stress, high amplitude, and low frequency are most likely to trigger block instability and sliding. Blocks with a single sliding surface are more prone to movement than those with multiple constraints, and roof‐positioned blocks are especially vulnerable to slide.
Xiao Wang, Jinxiao Liu, Gaoshuo Zhang, Wenxin Li, Changdi He   +4 more
wiley   +1 more source

The environment and energy consumption of a subway tunnel by the influence of piston wind

, 2019
With the flourishing development of the subway construction, it becomes increasingly urgent to improve the subway tunnel environment and reduce the energy consumption of the tunnel ventilation system.
You, S.,, Liu, Minzhang,, Zhu, C.,, Zheng, W.,, Liu, M.,, Zhu, Chunguang,, You, Shijun,, Zhang, Huan,, Yan, Jinyue,, Zheng, Wandong,, Zhang, H.,, Campana, Pietro Elia,   +11 more
core   +1 more source