Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 19 of 19 for “"Deep excavation"”.
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Behavior of deep excavation with diaphragm wall
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1993.
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Effect of deep excavation on an adjacent pile foundation
… axially loaded pile located close to a 30m deep braced excavation in Marine Clay corresponding to site conditions of the Kallang formation in Singapore. Parametric analyses were carried out, using non linear three-dimensional finite element methods (with Plaxis Foundation 3-D), comparing …
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A remedial approach to stabilize a deep excavation in Singapore
… improvement methods are commonly adopted in deep excavation to minimize wall deflection, wall bending moment and strut force. In this thesis a different approach to the application of ground improvement techniques is analyzed in the form of a parametric study developed with the use of a …
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Re-analysis of deep excavation collapse using a generalized effective stress soil model
… re-analyzes the well-documented failure of a 30m deep braced excavation underconsolidated marine clay. Prior analyses of the collapse of the Nicoll Highway have relied on simplified soil models with undrained strength parameters based on empirical correlations and piezocone penetration data. In …
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Application of new observational method on deep excavation retaining wall design in London Clay
… achieved on embedded retaining wall design for deep excavation in London Clay through the observational method, without compromising safety. Despite the inherent benefits of the method and its acceptance by design codes, the application of the observational method for excavation design has been …
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Enhanced Anisotropic Bounding Surface Model: Implementation and Simulation of Excavation in Soft Cohesive Soils
… with the coupling analysis for simulating deep excavation induced ground deformations. The first phase of this research illustrates efforts in integrating the enhanced anisotropic bounding surface model into finite element analysis (FEA) software. The implementations are validated against …
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Finite Element Analysis of Deep Excavations
… SAGE, and research on the performance of deep excavations. SAGE was developed at Virginia Tech for analysis of soil-structure interaction problems (Morrison, 1995). The purpose of the work described in this text with SAGE was to increase the capabilities of the program for soil-structure …
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Visualization in Geomechanics With an Application to Deep Excavations
… of this dissertation explores the behavior of deep excavation numerical analyses, with the aid of the visualization techniques presented herein. First, a 2D plane strain excavation analysis is explored. Second, a 3D linear excavation is modeled using a variety of excavation techniques. Finally, …
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Determinação dos parâmetros de resistência, "Creep" e de Relaxação de Tensões de uma argila mole do Rio de Janeiro
… would be of more interest for the design of a deep excavation in this clay.
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Numerical upper and lower bound limit analysis for braced excavations
… example application for the stability of a broad excavation for the MUNI Metro Turnback project in San Francisco. This well documented case study involves a 13 M deep excavation within a deep deposit of May Mud that was supported by an SPTC wall with three levels of cross-lot bracing. The …
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Ground movements due to excavation in clay: physical and analytical models
… view of the recent catastrophes associated with deep excavations, there is an urgent need to provide vital guidelines on the design of the construction process. To develop a simple tool for predicting ground deformation around a deep excavation construction for preliminary design and …
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Integrated computational-experimental soil behavior characterization from direct simple shear tests on Boston Blue Clay
… Boston Blue Clay (BBC) are directly applied to deep excavation case histories. The analysis results show that the global responses, such as lateral wall deflections and vertical ground surface settlements, can be successfully reproduced. The proposed approach represents a major shift in our …
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A solution to the braced excavation collapse in Singapore
At about 3:30pm on April 20, 2004, a 30m deep excavation adjacent to Nicoll Highway in Singapore collapsed, resulting in four casualties and a delay of part of a US$4.14 billion subway project. This thesis examines the flaws in the original design of the bracing system, which have been cited as …
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Examining the feasibility of a novel ground-storage cooling system
… of the overall building size and did not require deep excavation. Winter thermal modeling showed that the soil block could be fully charged in a typical winter season. The summer thermal modeling showed that the system can meet the majority of the building cooling loads and is capable of …
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Three-dimensional finite element analysis of a complex excavation on the MIT campus
Large excavation projects in urban areas are complex geotechnical problems when it is necessary not only to ensure the stability of the excavation and support system, but also to minimize impacts on adjacent buildings and structures. These problems require more comprehensive analyses that represent …
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A community-based experience of being permanently excluded from secondary school: an existential reflection
… space, time, emotion and paradox. It enabled a deep excavation into the felt experience of participants across the four dimensions of existence. Blending two such heuristic, phenomenological devices enabled the richness of the data to reveal itself with strength and clarity. The findings …
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Performance monitoring and numerical modelling of a deep circular excavation
For the design of deep excavations, codes and standards advise to base estimates of wall deflections and ground movements on empirical data. Due to the limited number of case studies on circular excavations it is nearly impossible to find comparable projects under similar conditions. Therefore …
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Response of piled buildings to the construction of deep excavations
Trends in the construction of deep excavations include deeper excavations situated closer to buildings. This research provides insight into mechanisms of soil-structure interaction for piled buildings adjacent to deep excavations to be used in the design and monitoring of deep excavations in urban …
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ANALYSIS AND DESIGN OF EXCAVATION SUPPORT SYSTEM IN SOFT CLAY
Conventional design procedures for deep excavations in soft clay in Singapore are not always adequate. Consequently, difficulties such as large strut loads and excessive ground movements are often encountered. Therefore, a method was proposed for the design of excavation support system in soft …