Live coal storage structure, Genesee Generating Station

1990 ◽  
Vol 17 (6) ◽  
pp. 1033-1043
Author(s):  
C. E. Chan ◽  
R. L. Martin ◽  
D. Weinreb ◽  
D. R. Trowsdale
Keyword(s):  
Monitoring Program ◽  
Earth Pressure ◽  
Field Measurements ◽  
Basic Design ◽  
Storage Structure ◽  
Soft Clays ◽  
Construction Methods ◽  
Reinforced Earth ◽  
Overall Stability ◽  
Design And Construction

The development, by Edmonton Power, of the Genesee Generating Station has necessitated construction of a 40 000-t live coal storage structure. The live storage is a 170 m long coal slot based 17 m below grade. It comprises a concrete U box and inclined reinforced earth sidewalls. The site is underlain by soft clays, which posed special problems for design and construction. Analytical and construction methods were developed to suit the geotechnical and site constraints. A monitoring program was instituted during construction to verify the design assumptions and to confirm the overall stability. This paper reviews the decisions involved in the basic design of the structure, and methods of dealing with design and construction problems. Key words: excavation, struts, earth pressure, reinforced earth, field measurements.

Roadway Deck of a Marine Terminal Facility in Egypt

2019 ◽  
Author(s):  
José J. Oliveira Pedro ◽  
José Dâmaso ◽  
Loïc Van Durmen ◽  
Hubert Vander Meulen
Keyword(s):  
Red Sea ◽  
Fast Track ◽  
Offshore Structure ◽  
Construction Planning ◽  
Main Design ◽  
Simply Supported ◽  
Construction Methods ◽  
Design And Construction

<p>This paper presents the Ain Sukhna Product Hub, a marine terminal facility recently finished in the Red Sea, Egypt, including the design and construction of a 3 km long offshore roadway. Formed by 83 simply supported spans, the roadway structures are elements that can greatly impact on the construction planning. An overview of the fast track nature of design, procurement and construction of this significant offshore structure are presented, describing the main design works and construction methods and highlighting the importance of the coordination with construction team and reality of the specific conditions in the project’s country.</p>

scholarly journals Study on the Stability of the Geogrids-Reinforced Earth Slope under the Coupling Effect of Rainfall and Earthquake

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Xijun Zhang ◽  
Liang Huang ◽  
Yujie Hou ◽  
Bo Wang ◽  
Binghan Xue ◽  
...  
Keyword(s):  
Dynamic Response ◽  
Coupling Effect ◽  
Calculation Model ◽  
Influential Factor ◽  
Construction Design ◽  
Reinforced Earth ◽  
Overall Stability ◽  
Earth Slope ◽  
Earth Slopes ◽  
The Stability

This paper focuses on understanding the dynamic response problem of flexible wrapped reinforced Earth slope under the coupling effect of earthquake and rainfall; a numerical calculation model of reinforced Earth slope considering the coupling effect of earthquake and rainfall was established. The dynamic response, pore pressure, and tensile stress distribution of the reinforcement under the rainfall before earthquake, the rainfall after the earthquake, and earthquake-rainfall are studied. The results show that the coupling effect of earthquake and rainfall is an influential factor in the dynamic analysis of reinforced Earth slopes, the analysis of which should be paid attention to and researched in the future. The combination of geogrid and soil effectively improves the deformation of the slope and the overall stability, reduces the secondary disaster of the slope, and provides a reference for the seismic construction design of the reinforced Earth slope.

scholarly journals The displacement of structures founded on expansive soils – unapparent causes

2018 ◽  
Vol 45 ◽  
pp. 00098
Author(s):  
Szymon Topoliński ◽  
Aleksandra Gorączko ◽  
Jacek Sztubecki ◽  
Adam Bujarkiewicz
Keyword(s):  
Environmental Changes ◽  
Expansive Soils ◽  
Monitoring Program ◽  
Field Measurements ◽  
Building Structure ◽  
Volume Changes ◽  
Coordinate Method ◽  
Geotechnical Investigations ◽  
Vertical Displacements ◽  
Soil And Water

Determining the causes for the displacement of damaged structures located on expansive soils often requires meticulous and individual analyses of many factors. The sensitivity of the expansive subsoils to environmental changes in humidity, activating its volume changes, requires a careful and comprehensive monitoring of structures susceptible to deformation. The article presents the method of the diagnostics of structures, located on an expansive subsoil in Poland. The methodology and preliminary results of the measurement of the vertical displacements of a building structure founded on expansive subsoil were presented. During field measurements, periodic geodetic measurements of structural displacements were carried out using classical precision levelling and the coordinate method of the Leica TDRA 6000 laser station. At the same time, geotechnical investigations were carried out describing the condition of the ground on which the structure is located. An analysis of the obtained results allowed determining the existing soil and water conditions and drawing unapparent conclusions regarding the causes of damage to the tested structure. On this basis, a further structures monitoring program was established.

The equivalence of a jointed shield-driven tunnel lining to a continuous ring structure

2001 ◽  
Vol 38 (3) ◽  
pp. 461-483 ◽  
Author(s):  
K M Lee ◽  
X W Ge
Keyword(s):  
Pressure Distribution ◽  
Joint Stiffness ◽  
Earth Pressure ◽  
Horizontal Displacement ◽  
Internal Force ◽  
Ring Structure ◽  
Tunnel Lining ◽  
Bending Rigidity ◽  
Continuous Ring ◽  
Soft Clays

This paper presents a new method of determining the correction factor to approximate a jointed, shield-driven tunnel lining as a continuous ring structure under plane strain conditions. An earth pressure distribution pattern is proposed which is developed based on the long-term behavior of shallow tunnels constructed in soft clays as observed in the field. The "force method" was used to determine the internal forces and displacements of jointed, shield-driven tunnels. Either the vertical or the horizontal displacement of the tunnel lining can be used as a common matching parameter. Factors such as joint stiffness, soil resistance, joint distribution, number of joints, and tunnel geometry can be considered by the proposed method. Simplified design equations for the estimation of equivalence factors are also proposed for the typical tunnel lining geometry of urban subway tunnels. The proposed equivalence method was evaluated by comparing it with the results of laboratory tests.Key words: shield-driven tunnel, jointed segmental lining, effective bending rigidity ratio, equivalence factor, lining internal force, earth pressure distribution.

Prediction and analysis of subsidence induced by shield tunnelling in the Madrid Metro extension

2002 ◽  
Vol 39 (6) ◽  
pp. 1273-1287 ◽  
Author(s):  
Manuel Melis ◽  
Luis Medina ◽  
José M Rodríguez
Keyword(s):  
Earth Pressure ◽  
Tunnel Construction ◽  
Pressure Balance ◽  
Ground Movements ◽  
Construction Methods ◽  
The Earth ◽  
Predictive Methods ◽  
Shield Tunnelling ◽  
Earth Pressure Balance ◽  
Numerical Modelling And Analysis

The development of tunnelling projects under heavily populated cities has been rapidly increasing around the world during the last decades. Since tunnel construction can have disastrous effects on buildings, structures, and utilities near the excavation, construction methods have necessarily to provide maximum safety inside and outside the tunnel. To predict and correct dangerous ground movements due to the tunnelling works, the authors developed a numerical model to simulate the earth pressure balance (EPB) excavation procedure and injection to complement some deficiencies found in previous analytical or empirical subsidence estimating procedures. This model takes into account the full excavation sequence and has been validated by a large amount of monitoring data from the previous Madrid Metro extension. In the present paper, several predictive methods are used to predict the ground movements generated during a new Madrid Metro extension project consisting of 48 km of tunnel (1999–2003). At the end of the works the results will be compared with data from monitored sections placed in all five cities linked by the extension. Conclusions about the applicability and accuracy of the methods will be established with the aim of helping researchers and engineers in their future projects.Key words: ground movements, monitoring, numerical modelling and analysis, settlement, tunnels.

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