土工基础

›› 2016, Vol. 30 ›› Issue (3): 355-357.

• 工程实录 • 上一篇    下一篇

某输气管道沿线冻土的分布及其工程特性研究

颉铎铃   

  1. （中国有色金属工业西安勘察设计研究院，西安 710054）
  • 收稿日期:2015-12-25 修回日期:2016-01-06 出版日期:2016-06-20 发布日期:2016-06-21
  • 作者简介:颉铎铃 （1966-），男，高级工程师，国家注册岩土工程师，研究方向为岩土工程。

Design and Construction of a Gas Pipeline in Frozen Soils

XIE Duoling   

  1. (Xi’an Engineering Investigation and Design Research Institute of China National Nonferrous Metals Industry, Xi'an, 710054)
  • Received:2015-12-25 Revised:2016-01-06 Online:2016-06-20 Published:2016-06-21

摘要： 根据某输气管道沿线冻土分布地段的工程实践，通过分析总结，在阐述冻土分布和工程性能的基础上，结合原有管道在该地段的工程病害，提出冻土的主动保护及预防措施。建议在冻土工程中，应科学勘察、掌握冻土的分布规律及工程特性，管道不宜直接埋设在季节性冻土层内，在冻胀区，可在管道周围回填粗砂、中砂、炉渣、碎石等非冻胀性散粒材料或采取其他有效措施。在施工过程中应选择合理的施工期，施工期间应避免水流浸入管沟。

关键词: 冻土, 分布, 工程特性

Abstract: This paper presents a case history of design and construction of a gas pipeline in frozen soils. The paper first introduces the distribution and engineering properties of frozen soils. The potential hazard of pipelines over the frozen soils and their mitigation measures are then proposed. For engineered facilities in frozen soils, proper geotechnical investigations are necessary in order to characterize the frozen soils and their engineering properties. In general, pipelines should not be installed in soils with seasonal freezes and thaws. In the freeze expansion zone, the pipeline should be backfilled with nonfrost heave materials such as, coarse or medium sands, slags or crushed stones. The surface runoff water should be prevented to flow into the excavated trenches.

Key words: Frozen Soils, Frozen Soil Depths, Engineering Characteristics