| Ground fissure, as a kind of the geological hazards phenomenon on surface, has become one of the major regional geological hazards, develops universally and its situation is increasingly aggravated year by year in China. The ground fissure has a large scale, strong active intensity and heavy disaster. The discussion of ground fissure developing characteristic and formation mechanism not only has an important significance for the assessments of local project field, a plan of civil construction, the measures of preventing and reducing hazards and the civil economic development, but also can offer the evidence for the regional stability appraisement of the earth crust.Influence factors of HanDan ground fissures movement are very complicated. Now, many researchers believe that the movement mode and intensity of the ground fissures are mainly controlled by the Handan fault and the ground subsidence caused by excessively pumping ground water , especially the differential subsidence on both sides of the ground fissures is the major reason of intense movement of ground fissures at present. But there is few research on the mechanism of ground fissure formation affect to the ground fissures.This paper set about studying the cause and the developing course of ground fissures from the basic principium of soil mechanics. It clarifies the genetical mechanism for this kind of calamity and achieves some experiences about the developing regularity of ground fractures. Ground fissure of Handan is a kind of the geological hazards phenomenon on surface, it is controlled by structure and outside element for instance the reduce of water level and subsidence, belong to composite reason. And based on these jobs, it analyzed all sorts of factors that cause ground fractures developed in Handan districts. So this made some meaningful explorations at the aspects of calamity evaluation and anti- calamity countermeasures, put forwards some engineering measures about this fields. |
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