长江科学院院报 ›› 2021, Vol. 38 ›› Issue (8): 97-103.DOI: 10.11988/ckyyb.20200671

• 岩土工程 • 上一篇    下一篇

基于正交试验法的埋地钢管参数敏感性分析

伍鹤皋, 于金弘, 石长征, 石雅竹   

  1. 武汉大学 水资源与水电工程科学国家重点实验室,武汉 430072
  • 收稿日期:2020-07-07 修回日期:2020-10-22 出版日期:2021-08-01 发布日期:2021-08-06
  • 通讯作者: 石长征(1983- ),女,湖北荆门人,讲师,博士后,主要从事压力管道和结构抗震研究。E-mail:scz4@163.com
  • 作者简介:伍鹤皋(1964- ),男,江西宜丰人,教授,博士,主要从事压力管道和地下工程研究。E-mail: wbf1988@vip.sina.com
  • 基金资助:
    国家自然科学基金项目(51679175)

Sensitivity Analysis for Parameters of Buried Steel Pipes Based on Orthogonal Test Method

WU He-gao, YU Jin-hong, SHI Chang-zheng, SHI Ya-zhu   

  1. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China
  • Received:2020-07-07 Revised:2020-10-22 Online:2021-08-01 Published:2021-08-06

摘要: 埋地钢管在设计时需考虑管周土体和沟槽对钢管的影响,但土体力学参数和沟槽形态参数对钢管结构的影响研究不够深入。通过引入正交试验法,以钢管最大竖向变形和钢管顶、腰、底处环向弯曲应力为试验指标,进行回填土变形模量E1、砂垫层变形模量E2、垫层包角θ、沟槽底部开挖宽度B和沟槽侧壁倾角α关于试验指标的敏感性分析。研究表明:对钢管变形和应力敏感性较高的因素有E1E2α;B的敏感性较低;θ的敏感性最低。埋地钢管的土体变形模量高、沟槽窄对钢管结构有利,沟槽侧壁倾角影响较为复杂,需结合具体工程进行分析。研究成果可为合理选取埋地钢管的结构设计参数,提供一定的参考依据,同时也为类似问题提供一种分析思路。

关键词: 埋地钢管, 参数敏感性, 正交试验法, 有限单元法, 结构设计

Abstract: In the design of buried steel pipes, the influences of surrounding soil and trench on the steel pipes need to be taken into consideration, which are researched inadequately. The sensitivities of such parameters inclusive of the deformation modulus E1 of backfill, the deformation modulus E2 of sand bedding, the bedding angle θ, the trench bottom width B, and the inclination angle α of trench sidewalls to test indices (maximum vertical deformation of pipe, circumferential bending stresses of pipe top, springline, and bottom) were examined via an orthogonal test method. Results suggest that E1, E2, and α are highly sensitive to the test indices, while B bears low sensitivity to the test indices, and θ has the lowest sensitivity. The high soil deformation modulus and narrow excavation trench are beneficial to the structure of buried steel pipes, while the inclination angle of trench sidewalls has a complex influence on pipes and needs to be analyzed in line with specific situation. The research findings provide references for the parameter design of buried steel pipes.

Key words: buried steel pipes, sensitivity analysis for parameters, orthogonal test method, finite element method, structure design

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