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< Natural Gas and Oil > Editorial Department
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Tang Xiaoyong,Pu Liming
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Issue:ISSN 1006-5539
          CN 51-1183/TE

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    Your Position ：Home->Past Journals Catalog->2011 Vol.6

    Considerations in Earthquake Fortification Safety of Oil and Gas Pipelines Passing through Active Faults
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    Key Words：Oil and gas pipeline； Active fault； Frozen earth； Earthquake fortification； Safety
    Abstract：All previous violent earthquakes in the world have resulted in significant losses of underground oil and gas pipelines passing through active faults. Earthquakes have occurred many times in China and have resulted in very serious earthquake disasters and great importance is attached to the safety of the oil and gas pipelines. However， in the Chinese national standard “Seismic Technical Code for Oil and Gas Transmission Pipeline Engineering Design” （GB50470－2008）， effects of different rupture forms， rainfall and frozen earth coverage on calculation models and soil mechanics parameters are not considered in seismic design methods of underground oil and gas pipelines passing through active faults. Frozen earth area in China is about 90 % of her total area， buried oil and gas pipelines are covered with frozen earth in winter， actual working conditions in case of earthquakes will be completely inconsistent with hypothetical working conditions in the code， mechanics parameters of the earth around pipelines will change greatly due to rainfall and the results calculated according to the code will result in erroneous judgment of earthquake fortification safety of oil and gas pipelines passing through active faults. Accordingly， it is suggested that re-assessed is earthquake fortification safety of oil and gas pipelines passing through active faults in service or under construction.
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