| Ground fissure is a geological disaster in ground deformation, which has coursed the deterioration of the environment directly or spacing. Ground fissure reduces the quality of the environment, against humanity and Biosphere development .Now Ground fissures are found in many countries, their frequency and extent of disasters increased year by year, pipeline damage brings a great deal of inconvenience to people's lives, pipeline failure has some impact to society and environment, serious impact on pipeline operations.This article analyzes the causes of the mwchanism, the basic characteristics of ground fissure,Special analysis of the structural characteristics, the distribution and the activities of xi'an ground fissure—a type of fault creep of ground fissure, introduces the relevant information of undergroud pipeline and the pipeline damage. In order to study the damage mode and mechanism of pipelines when they cross through the ground fissures, carrying out physical simulation experiments to draw the three failure modes when pipelines cross through ground fissures.In addition, Finite element software, establishing a three-dimensional finite element model to simulate underground pipelines cross through ground fissures, the destruction of pipelines caused by the dislocation of the soil, And by analysis of the different diameter, depth, thickness as well as such factors as soil case by case of the pipe deformation, stress and damage. it has some meaningful results on soil - structure interaction mechanism and on prevention and mitigation of disasters of ground fissures.Base of the relationship between the underground pipelines and ground fissures, this article has taken some structural measures and ideas. Pipeline joints are most likely to be damaged, This article has also been some joints measures, Take appropriate measures to reduce ground fissures hazard activities, Accumulated some experience in lifeline project construction, such as underground pipeline.
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