Results 11 to 20 of about 4,742,204 (190)

Analysis of the Temporal and Spatial Evolution Behavior of Earth Pressure in the Shield Chamber and the Ground Settlement Behavior During Shield Tunneling in Water-Rich Sand Layers

Buildings
Earth Pressure Balance (EPB) shield machines have been widely used in subway construction due to their versatility and safety. During the shield tunneling process, the earth pressure in the shield machine chamber is crucial for controlling ground ...
Hongzhuan Ren, Jie Chen, Haitao Wang, Yonglin He, Xuancheng Fang, Liwu Wang   +5 more
doaj   +2 more sources

Soft computing approach for prediction of surface settlement induced by earth pressure balance shield tunneling [PDF]

Underground Space, 2021
Estimating surface settlement induced by excavation construction is an indispensable task in tunneling, particularly for earth pressure balance (EPB) shield machines.
W.G. Zhang, H.R. Li, C.Z. Wu, Y.Q. Li, Z.Q. Liu, H.L. Liu   +5 more
doaj   +2 more sources

An unsupervised incremental learning model to predict geological conditions for earth pressure balance shield tunneling

Journal of Rock Mechanics and Geotechnical Engineering
Current machine learning models for predicting geological conditions during earth pressure balance (EPB) shield tunneling predominantly rely on accurate geological conditions as model label inputs.
Jiajie Zhen, Fengwen Lai, Jim S. Shiau, Ming Huang, Yao Lu, Jinhua Lin   +5 more
doaj   +2 more sources

Influence Mechanisms of Earth Pressure Balance Shield Tunneling Parameters on Chamber Pressure and Surface Settlement: A Theoretical and FDM-DEM Coupled Analysis

Applied Sciences
In earth pressure balance (EPB) shield tunneling, chamber pressure control is essential for maintaining excavation-face stability and limiting surface settlement.
Weiguo He, Yang Luo, Yong Yu, Yaming Zhang, Tengfei Li, Wenjun Liu, Yijie Zhang   +6 more
doaj   +2 more sources

Real-Time Dynamic Earth-Pressure Regulation Model for Shield Tunneling by Integrating GRU Deep Learning Method With GA Optimization

IEEE Access, 2020
This paper proposes an intelligent framework to predict and automatically regulate earth pressure using a deep learning technique during earth pressure balance shield tunneling. A prediction model was proposed by integrating a new cost function (relative
Min-Yu Gao, Ning Zhang, Shui-Long Shen, Annan Zhou   +3 more
doaj   +2 more sources

Ground-Type Classification from Earth-Pressure-Balance Shield Operational Data with Uncertainty Quantification

Applied Sciences
In urban underground space construction using shield tunnelling, the geological conditions ahead of the tunnel face are often uncertain. Without timely and accurate classification of the ground type, mismatches in operational parameters, uncontrolled ...
Shuai Huang, Yuxin Chen, Manoj Khandelwal, Jian Zhou   +3 more
doaj   +2 more sources

Experimental Study of the Influence of Excavation Surface Stability and Sand Flowability Caused by Dense Slurry–Earth Pressure Balance Shield Tunneling in Silty Sand Stratum

Advances in Civil Engineering, 2020
Silty sand is highly permeable and has a large internal friction angle. To ensure the stable and efficient construction of the Earth pressure balance (EPB) shield in silt stratum, it is necessary to reduce the disturbance to the stratum during tunneling ...
Yongjin Qian, Fanlu Min, Zhenze Mo, Xihui Fan   +3 more
doaj   +2 more sources

Heliotropic dust rings for Earth climate engineering [PDF]

, 2013
This paper examines the concept of a Sun-pointing elliptical Earth ring comprised of dust grains to offset global warming. A new family of non-Keplerian periodic orbits, under the effects of solar radiation pressure and the Earth's J(2) oblateness ...
Bewick, Russell, Colombo, Camilla, Sanchez Cuartielles, Joan-Pau, McInnes, Colin, Bewick, Charlotte   +4 more
core   +4 more sources

Geo-engineering using dust grains in heliotropic elliptical orbits [PDF]

, 2011
This paper examines the concept of a Saturn-like Earth ring comprised of dust grains to offset global warming. A new family of non-Keplerian periodic orbits, under the effects of solar radiation pressure and the Earth’s oblateness J2 perturbation, is ...
Bewick, Russell, Colombo, Camilla, Sanchez Cuartielles, Joan-Pau, Sanchez, J. P., Bewick, R, Lücking, C., McInnes, Colin, Mcinnes, C. R., Lucking, Charlotte   +8 more
core   +3 more sources

An L1 positioned dust cloud as an effective method of space-based geoengineering [PDF]

, 2010
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, R., Sanchez, J.P., McInnes, C.R.
core   +3 more sources