Results 21 to 30 of about 4,742,204 (190)
Surface settlements induced by twin tunneling in silty sand
Underground Space, 2022 Surface settlements caused by twin tunneling are a major interest in underground space engineering. Most prevailing studies have investigated the surface settlements observed over twin tunnels constructed in clay. Yet, less attention is given to the twin
K.K. Pabodha M. Kannangara +2 more
doaj +1 more source
The feasibility of using an L1 positioned dust cloud as a method of space-based geoengineering [PDF]
, 2012 In this paper a method of geoengineering is proposed involving clouds of dust placed in the vicinity of the L1 point as an alternative to the use of thin film reflectors.
Bewick, Russell +2 more
core +4 more sources
Advances in Civil Engineering, 2022 Tunnel engineering based on the shield method is an extremely complex project. During the construction process, many uncertain factors are often faced, which makes it difficult to effectively and quantitatively evaluate the effectiveness of the shield ...
Jiangsheng Xie +6 more
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Optimization of mixture ratio of muck grout by earth pressure balance shield machine
Yantu gongcheng xuebao, 2023 The silty clay is the common muck in urban shallow tunnels, and how to realize the reuse of on-site resources of muck is an urgent problem to be solved in the field of shield tunneling.
ZHANG Jian 1, JIN Junjie 2, FENG Tugen 1, LIU Jiangtao 3
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Soil Improvement of EPBS Construction in High Water Pressure and High Permeability Sand Stratum
Advances in Civil Engineering, 2019 A mud-water balance shield is the preferred method for the high permeability and high water pressure stratum, but when restricted by construction and environmental conditions, the shield must be constructed with the earth pressure balance shield (EPBS ...
Shimin Wang +6 more
doaj +1 more source
freeze-thaw cycle, seasonal frozen soil, geogrid, reinforced characteristic
Yantu gongcheng xuebao, 2019 The soils are a transfer medium between supporting force of excavation face and earth pressure of soil chamber, and their performance directly affect the control of earth pressure of soil chamber, the supporting force of excavation faces, and the ...
XIAO Chao 1,2,3, TAN Li-xin 2,3, CHEN Ren-peng 1, ZHONG Zhi-quan 2,3, YANG Jun-sheng 4
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Systematic study of effect of cross-drafts and nozzle diameter on shield gas coverage [PDF]
, 2013 A shield gas flow rate of 15–20 L min21 is typically specified in metal inert gas welding, but is often adjusted to as high as 36 L min21 by welders in practice. Not only is this overuse of shield gas wasteful, but uncontrolled high gas flows can lead to
Campbell, Stuart +5 more
core +4 more sources
Visualization of Multivariate Time-Series Characteristics of Ground Loss Caused by Shield Tunneling
Shock and Vibration, 2021 Ground loss due to earth pressure balance shield tunneling eventually leads to a surface settlement which can be an issue of great concern. However, the existing machine learning methods ignore the continuous and dynamic nature of EPB shield tunneling ...
Zhu Wen +4 more
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Performance Simulation Analysis and Design of the Scale Model for the Earth Pressure Balance Shield
, 2011 Referring to the Earth Pressure Balance (EPB) shield with the diameter of 6.25m, a new experiment station of EPB shield is proposed, which is loaded with mechanical structure instead of traditional soil box.
Ping Fa Feng +3 more
core +1 more source
Advances in Civil Engineering, 2020 The sliming problem of chamber soil is caused by excessive groundwater seeping into the pressure chamber when an Earth pressure balance shield tunnels through a water-rich weathered rock stratum under semiopen under-pressure mode.
Lu Wang +5 more
doaj +1 more source