Results 121 to 130 of about 106,010 (167)

Micromechanical study of soil conditioning on Sandy Stratum for an EPB Shield

Journal of Physics: Conference Series, 2021
openaire   +1 more source

Numerical Examination of EPB Shield Tunneling–Induced Responses at Various Discharge Ratios

Journal of Performance of Constructed Facilities, 2019
This study investigated earth pressure balance (EPB) shield tunneling-induced responses in terms of muck pressure, machine parameters, and surface settlements using an efficient numerical scheme that couples PFC3D and FLAC3D software.
Xuemin Zhang, Tongming Qu
exaly   +2 more sources

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Measured Soil Response to EPB Shield Tunneling

Journal of Geotechnical Engineering, 1983
The first earth pressure balance (EPB) shield project in the United States, a 3,000 ft (915 m) long, 12.1 ft (3.7 m) diameter, tunnel is described. It is located in San Francisco and passes beneath a heavily trafficked commercial area known as Fisherman's Wharf.
G. Wayne Clough, Bryan P. Sweeney, Richard J. Finno   +2 more
openaire   +2 more sources

Evaluation of Soil Response to EPB Shield Tunneling

Journal of Geotechnical Engineering, 1985
Earth pressure balance (EPB) shields can be operated so that soil is forced away from its face; this heaving process may cause smaller surface settlements than would result from tunneling, without inducing any initial heave. Field observations made at the first EPB project in the U.S.
Richard J. Finno, G. Wayne Clough
openaire   +2 more sources

Nonlinear adaptive control of EPB shield tunneling machine

2017 American Control Conference (ACC), 2017
This paper solves the issue of earth pressure balance (EPB) control in shield tunneling. Keeping earth pressure balanced on cutting head is the key to ground deformation avoidance. However, only a few control methods based on mechanism model are put forward and all the model applied before seldom involved nonlinearity and uncertainty. Thus, a nonlinear
Xiaodong Xu, Weijie Mao
openaire   +2 more sources

Laboratory Test of EPB Shield Tunneling in Mixed-Face Conditions

International Journal of Geomechanics, 2021
Abstract Field measurements and laboratory tests were carried out to study the mechanical behaviors of soil in response to earth pressure balance (EPB) shield tunneling in mixed-face conditions, i....
Yong Fang, Wei Fu, Xiongyu Hu
exaly   +2 more sources

Earth pressure balance control for EPB shield

Science in China Series E: Technological Sciences, 2009
This paper mainly deals with the critical technology of earth pressure balance (EPB) control in shield tunneling. On the assumption that the conditioned soil in the working chamber of the shield is plasticized, a theoretical principle for EPB control is proposed.
HuaYong Yang, Hu Shi, GuoFang Gong, GuoLiang Hu   +3 more
openaire   +1 more source

Modeling and analysis of thrust force for EPB shield tunneling machine

Automation in Construction, 2012
Abstract Thrust force is an important parameter for the design and operation of earth pressure balance (EPB) shield tunneling machine. The analysis of in-situ data indicates that the conventional thrust force estimation model based on an empirical equation gives rather rough result.
Guofang Gong, Lintao Wang
exaly   +2 more sources

EPB Shield Tunneling in Mixed Face Conditions

Journal of Geotechnical Engineering, 1993
The earth pressure balance (EPB) shield has proven to be successful for tunneling in soft ground in homogeneous soils. On three recent soft ground tunneling projects in Washington, D.C., EPB shields were used in mixed ground conditions with a high water table. Many areas were found with sands in the crown, and clays in the invert.
G. Wayne Clough, Eric Leca
openaire   +1 more source

Earth pressure multipoint forecasts and optimal control for EPB shield

2014 20th International Conference on Automation and Computing, 2014
This article discusses multipoint earth pressure prediction issue for EPB (Earth Pressure Balance) shield chamber's pressure field. Based on advance rate, rotating speed of the cutter head, screw conveyor speed, and the earth pressure measurements, four forecasting models are established for shield chamber pressure points with the adaptive neuro-fuzzy ...
Kairu Li, Yan Zhang, Cheng Shao
openaire   +1 more source