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Collapsible loess ground fissures in Xi'an impact study

Author: LiBaoTian
Tutor: LiXinSheng
School: Chang'an University
Course: Environmental Engineering
Keywords: Fissure Collapsible Uneven subsidence
CLC: P694
Type: Master's thesis
Year: 2005
Downloads: 235
Quote: 6
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Abstract


Xi'an ground fissure is a major environmental geological disasters. About Xi'an ground cracks formation mechanism research on the rational and effective prevention and mitigation of ground fissures has important practical significance. Xi'an ground fissures complicated causes , is now generally considered to be of Xi'an ground fissure movement and intensity mainly by way of Lintong - Chang'an fault controlled , with the recent ground fissure movement intensified mainly due to excessive extraction of groundwater caused by uneven ground subsidence , particularly land on both sides of the vertical cracks caused by differential settlement . While Xi'an collapsible loess ground fissure activities, less the present study . By comparing , analyzing Xi'an collapsibility type collapsible level partitioning and horizontal distribution of ground fissures in Xi'an area as well as the relationship between the intensity of activities that the ground fissures in Xi'an in the region between the collapsible loess has a very strong correspondence between the two are strong west to east , north weak south strong activity characteristics , which shows Xi'an collapsible loess ground fissure activities with a positive correlation . Assumption by performing certain parameters established in this paper on the consideration of water along the surface of cracks penetrate the soil conditions , the calculation of the lower plate to fracture the soil takes place within a certain range of the formula collapsible deformation , while the collapsible deformation of the surface reflected in the , approximately equivalent to the ground on both sides of the surface cracks occur within a certain range of uneven subsidence deformation , this uneven subsidence deformation deformation superimposed onto ground fissure activities, will be exacerbated by the activities of destructive ground fissures . Finally, Xi'an ground fissures preventive measures carried out some simple discussion .

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