2 edition of Foundation response to subsidence-induced ground movements found in the catalog.
Foundation response to subsidence-induced ground movements
Jeffrey S. Walker
|Statement||by Jeffrey S. Walker and John C. LaScola.|
|Series||Report of investigations (United States. Bureau of Mines) -- 9224.|
|Contributions||LaScola, John C.|
|LC Classifications||USBMRI#9224 1989|
|The Physical Object|
|Pagination||12 p. :|
|Number of Pages||12|
|LC Control Number||88-600269|
Special Issue on Building and infrastructure response to ground movement: bridging the gap between geotechnical and structural modelling of SSI This Special Issue is a follow on from Mini-Symposium 6 that will be held at the 16th International Conference of the International Association for Computer Methods and Advances in Geomechanics. Subsidence is the sudden sinking or gradual downward settling of the ground's surface with little or no horizontal motion. The definition of subsidence is not restricted by the rate, magnitude, or area involved in the downward movement. It may be caused by natural processes or by human activities. The former include various karst phenomena, thawing of permafrost, consolidation, oxidation of organic soils, .
A foundation must be properly designed and constructed to resist soil movement. Retaining walls are a typical example of one construction method designed to contain soil movement. The inadequacy of the foundation to resist or accommodate soil movement or the failure of a retaining wall can constitute a construction defect. Ground subsidence caused by tunneling is becoming a common problem in China due to rapid developing of underground space. Superstructures may crack and/or incline subjected to localized ground subsidence caused by tunneling. Ground subsidence would also induce breakage of buried pipelines which may even cause ground collapse due to pipe : Min Zhou, Fei Wang, Yan-Jun Du.
in ground surface elevations across the region. Models were developed to estimate the vertical and horizontal tectonic movements. These tectonic movements were subtracted from the measured changes in ground surface elevation to determine the spatial distribution of liquefaction-related subsidence and ground surface deformation. EARTHQUAKE-RELATED. Subsidence induced by underground extraction is a class of human-induced (anthropogenic) land subsidence that principally is caused by the withdrawal of subsurface fluids (groundwater, oil, and gas) or by the underground mining of coal and other by: 1.
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Movements of both existing and specifically designed struc tures in response to mining-induced subsidence to deter mine the mechanism for the traqslation of ground strains into a structure. Once an understanding of this mechan ism is established, it may be possible to modify existing subsidence prediction models to predict mining-induced.
Get this from a library. Foundation response to subsidence-induced ground movements: a case study. [Jeffrey S Walker; John C LaScola]. The purpose of this U.S.
Bureau of Mines effort was to determine if ground movement caused by mining-induced subsidence is directly transferred to a structure and, if so, how that transfer takes place. Four concrete block walls with foundations were. Ground movements affecting buildings can result from the loads applied by the building itself to the subsoil or from a variety of external causes including swelling or shrinkage of the subsoil, subsidence due to tunnelling or mining, and groundwater lowering.
The textbook response to subsidence is to excavate down to stable ground and pump tonnes of concrete into the void. But this is expensive and disruptive, and can actually create problems when applied to old buildings, setting up new stresses between Author: Ian Rock.
Definitions of ground and foundation movement A study of the literature reveals a wide variety of confusing symbols and terminology describing foundation movements. Burland and Wroth () proposed a consistent set of definitions based on the displacements (either measured or calculated) of a number of discrete points on the foundations of a building.
The numerical studies indicated that the structural response to excavation-induced ground movements is highly dependent on both cracking in structures and structural types, and therefore their effects should be considered for better assessing the building response to excavation-induced ground by: Surface subsidence induced by underground mining is one of the challenging problems in mining engineering, which can destroy ground surface buildings and cause huge economic losses to the mine.
To make such a prediction, estimates are needed of the distributions of ground movements at the support level of a building foundation.
These estimates can be. This paper concerns the characterization of deep excavation-induced ground surface movements, using the results of numerical investigation. A calibrated 2D finite element model using the Lade’s double hardening constitutive model for soil was used to form a database of the wall and ground surface movements associated with deep by: Foundation response to subsidence-induced ground movements: a case study / (Pittsburgh, PA: U.S.
Dept. of the Interior, Bureau of Mines, ), by Jeffrey S. Walker and John C. LaScola (page images at HathiTrust). This paper describes the Bureau of Mines efforts to determine if mining-induced ground movement is directly transferred to a structure, and how that process takes place.
A series of four concrete block walls with foundations were constructed and monitored over an active longwall panel as part of a comprehensive subsidence research program. A ground movement such as landslide, ground heave, and subsidence can easily degrade the structural integrity of a tunnel, as well as the voids in ground (Meguid and Dang, ; JRB, ).In Japan, several tunnels suffering serious damage due to ground movement have been reported (Saitoh et al., ).The structural degradation caused by ground movement appears as transverse or.
Foundations of structures may experience movements through a number of causes, among which may be listed: (a) elastic and inelastic compression of the sub-soil due to the weight of the structure, (b) ground water lowering, producing an increase in effective stress beneath the foundation,File Size: KB.
Surface subsidence induced by underground mining is one of the challenging problems in mining engineering, which can destroy ground surface buildings and cause huge economic losses to the mine.
In this study, a two-dimensional numerical model, established by the discrete element method code PFC2D, was adopted to investigate the mechanical mechanism of surface subsidence and backfill Cited by: 1.
Types of foundation movement Causes of foundation movement Investigating damage Diagnosis Uses of monitoring Structural monitoring Foundation and ground movement monitoring 11 Remedial treatment and underpinning Introduction Mitigating the cause of ground movement Mine subsidence is the settlement of a part of the Earth's crust due to removal of subsurface solids or underground excavation.
Settlements may vary in magnitude from complete collapse or substantial lowering to small distrotions of the ground surface. Mine subsidence control is the use of techniques to prevent or reduce subsidence movements to avoid or minimize damage to surface structures.
The results of this investigation indicate that simple structures respond to subsidence in a similar manner as the ground surface, suggesting that once the transfer mechanism is fully defined through further field and laboratory research, prediction models can be developed or modified to allow accurate estimation of the effect of mining on surface structures.".
The pile foundation shows a similar displacement in different positions yet shows various degrees of influence. The most disadvantageous position is located closest to the outside of the pile, and the bearing capacity of the side pile foundation can be improved by utilizing an appropriate design.
Foundation Subsidence Damage What Is Foundation Subsidence. Subsidence is downward movement of an underlying supporting soil stratum due to the withdrawal of moisture is extracted from the soil, shrinkage occurs within the structure of the soil, and the corresponding area of the foundation and superstructure move downward.
The following precautions are generally adopted while building structures on black cotton soil. 1. To limit the load on the soil to tonnes/ sqr. m. if water is liable to to find an access to the foundations, the limit of loading should be restricted to 4, kg/ sqr.
m.In some instances, pile foundations are subjected to lateral loading caused by lateral movement of the surrounding soil. This paper describes an analytical method for evaluating pile foundation response to lateral ground movement. A model using beam on linear and nonlinear elastic foundations has been analyzed using the finite difference method.Pile foundation– Long concrete members take the load of the building through weak soils to load bearing strata.
Pad foundation – More commonly used under point loads, such as columns, but can be used under ground beams to transfer loads. Raft foundation – Concrete raft which spreads the loads over the whole ground floor, used where building loads are high, or ground conditions poor.