天然气工业2023，Vol.43Issue(12)：110-120,11.DOI:10.3787/j.issn.1000-0976.2023.12.012
阶梯沉降条件下埋地钢管的力学响应规律
Mechanical response behaviors of buried steel pipes under stepped settlement
摘要
Abstract
Geological settlement around buried pipes is one of the main geological hazards threatening pipes'safe and smooth operation.In order to study the mechanical response behaviors of buried steel pipes under the impact of settlement hazards,this paper carries out stepped settlement experiments on three sets of buried steel pipes with different burial depths using the independently constructed experimental box of buried pipes,to study the deformation patterns of soil and the mechanical response behaviors of pipes at different burial depths,settlement ranges,and settlement amounts.In addition,the differences in the soil-pipe interaction under different settlement modes are numerically simulated.And the following research results are obtained.First,for shallowly buried steel pipes,surface observation is a simple and direct method to infer the development degree of the settlement hazard.For deep buried steel pipes,it is suggested to deploy vertical soil displacement monitoring near the buried steel pipes.Second,at the initial stage of settlement,the increase of the settlement range and amount leads to a significant increase in the mechanical response of the pipes.With the further increase of settlement range and amount,however,the increase amplitude of pipes mechanical response decreases continuously.Third,as the burial depth of the pipes under stepped settlement increases,the strain increase amplitude of the pipes under the large settlement is much larger than that of the shallowly buried pipes.Fourth,buried pipes have stronger mechanical response to the overall soil settlement than to the stepped settlement.Therefore,it is suggested to control the regional soil settlement in the settlement area as much as possible to reduce the mechanical response of pipes and ensure pipes safety.In conclusion,the experimental results enrich and improve the understandings in the field of mechanical analysis of buried steel pipes under settlement hazards and help to further improve the existing safety assessment system of buried pipes,which is of great significance to ensuring the safe and smooth operation of pipes.关键词
阶梯沉降/埋地钢管/力学响应/土体变形/沉降模式/管土实验/数值模拟Key words
Stepped settlement/Buried steel pipes/Mechanical response/Soil deformation/Settlement mode/Pipe-soil experiment/Numerical simulation引用本文复制引用
刘鹏,黄维和,李玉星,范佳林,孙明源,胡香凝,张宇,王武昌,胡其会..阶梯沉降条件下埋地钢管的力学响应规律[J].天然气工业,2023,43(12):110-120,11.基金项目
国家重点研发计划资助项目"油气管网安全预警数据学习方法和工程应用"(编号:2021YFA1000103). （编号:2021YFA1000103）
