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Showing 1 to 20 of 42 for “"Ground movements"”.
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Ground movements during tunnelling in sand
During soft ground tunnel construction, if the face pressure of a tunnel boring machine is not strictly controlled, excessive ground movements will propagate vertically upwards causing significant damage to adjacent buried infrastructure and surface structures. In order to investigate the face …
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Ground movements associated with twin-tunnel construction in clay
… Any sub-surface construction will generate ground movements which have the potential to cause damage to existing surface and sub-surface structures. Urbanisation and congested cities have driven the need for accurate predictions of tunnelling-induced settlements and has produced many …
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The Response of Buildings to Excavation-Induced Ground Movements
… and together they are used to provide a background for developing guidelines for controlling building damage and to develop a procedure for estimating building damage due to excavation-induced ground movement. The procedure developed for estimating building damage can be implemented for …
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Foundation response to ground movements induced by tunnel excavation
… of horizontal displacements and horizontal ground strains, which are often under-predicted by current empirical and analytical methods. The crossing of the Grosvenor Bridge by an earth pressure balance tunnel boring machine (TBM) was back-analysed. Different soil-structure interaction …
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Effect of existing building on tunneling-induced ground movements
… of an existing structure on tunneling-induced ground movements. This is accomplished through 2D numerical simulations that are compared with similar prior studies reported by Potts and Addenbrooke (1997). The current study uses the Plaxis finite element code together with the Hardening Soil (HS …
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Influence of heave reducing piles on ground movements around excavations
… beneath deep excavations, as a means of reducing movements in the surrounding ground. The work focussed on the use of piles installed as a part of top down basement construction, a technique used in conjunction with deep excavations in urban areas. The investigations sought to explore the …
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Ground Movements Around Model Tunnels in Sand (Settlements, Shield, Photogrammetry)
… which simulated shield tunneling through soft ground, was developed and tested in dry sand. The test program was divided into four series of tests. In the O-, M-, and T-series, two concentrically placed circular tubes were used representing the model shield and model liner, respectively. The …
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MOVEX: interactive design of braced excavations to limit ground movements
… supported excavations to limit X lateral ground movements in clay soils, was revised and updated. A key element in the program, the method of determining factor of safety against basal heave, was fully rewritten. Seven case histories were examined to evaluate the program capabilities in …
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Ground movements due to excavation in clay: physical and analytical models
… process. To develop a simple tool for predicting ground deformation around a deep excavation construction for preliminary design and decision-making purposes, small scale centrifuge models were made to observe the complicated mechanisms involved. A newly developed actuation system, with which the …
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A study of building response and damage due to mining-induced ground movements
… have been developed to predict mining-induced ground movements. Some of these methods, such as the profile and influence functions, have been used successfully in a number of applications. Prediction methods, however, do not address the response of surface buildings and structures to …
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Prediction of instability and ground movements during tunnel construction in non-homogenous conditions
… and greatly increased the productivity of underground construction projects. For shallow tunnels in 'soft ground', instabilities can create collapse mechanisms that propagate to the ground surface, while the prediction and control of tunnel-induced ground deformations remain a key challenge. …
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Subsidence Damaged Homes Over Room and Pillar Mines in Illinois (Ground Movements, Damage Criteria)
… is established between residential damage and ground movements over Illinois room and pillar mines. Using this ground movement-damage criterion and knowing the expected level of ground displacement house damage can be estimated. Subsidence characteristics observed at the ground surface over …
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Prediction and interpretation of ground movements due to tunneling in stiff clay and impacts on adjacent structures
… around the precast lining in order to limit ground movements and potential damage to overlying structures. This thesis analyzes monitoring data from the Crossrail project involving twin tunnels construction using Earth Pressure Balance (EPB) machines in London Clay. The research focuses on …
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Prediction and measurement of ground movements due to pile driving in clay : a case study in East Boston
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2001.
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Numerical simulation of ground movements and structural forces in lining for Earth Pressure Balance (EPB) tunneling in clay
… a prescribed trajectory. The model simulates ground conditions associated with on-going EPB tunnel construction for the Crossrail project in central London. The analyses use a linearly-elastic perfectly plastic (MC) soil model based on design profiles of undrained shear strength and stiffness …
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Multidisciplinary investigation of the natural and anthropogenic ground movements in the Po Plain (Northern Italy) using geological and satellite data
L'abstract è presente nell'allegato / the abstract is in the attachment
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Application of rate dependent soil model, MIT-SR, for evaluation of long-term ground movements due to consolidation and creep
Saturated clays exhibit rate-dependent behavior (i.e. their stress-strain-strength properties are significantly affected by the applied loading rate). This is of great significance for geotechnical projects, particularly when long-term predictions of settlements of compressible soil strata are …
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Performance monitoring and numerical modelling of a deep circular excavation
… 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 designers have to adopt conservative approaches, which …
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Distributed Sensing for Monitoring Cast Iron Pipe Behaviour
… between pipe leakage and differential ground movements. Seasonal ground movements were monitored using total station and Light Detection and Ranging (LiDAR) surveying equipment. Ground movements of 23 to 30 mm were detected from a roadway repair required to fix a water main break, …
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Numerical modeling, characterization and monitoring of the seasonal behavior of expansive clays
Seasonal ground movements associated with the swelling and shrinking of expansive clays represent a major cause of damage to buildings, roads, and pipelines. The processes that give rise to these movements involve complex ground-atmosphere interactions (due to combined effects of infiltration and …
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