采动影响下浅埋输气管道与土体耦合作用机理

doi:10.11885/j.issn.1674-5086.2017.10.12.01

西南石油大学学报(自然科学版) ›› 2018, Vol. 40 ›› Issue (6): 139-147.DOI: 10.11885/j.issn.1674-5086.2017.10.12.01

采动影响下浅埋输气管道与土体耦合作用机理

曹正正¹, 郭帅房¹, 徐平¹, 蔺海晓¹, 陈家瑞²

1. 河南理工大学土木工程学院, 河南焦作 454000;
2. 淮阴工学院建筑工程学院, 江苏淮安 223001

收稿日期:2017-10-12 出版日期:2018-12-01 发布日期:2018-12-01
通讯作者: 曹正正,E-mail:caozz@hpu.edu.cn
作者简介:曹正正,1990年生,男,汉族,安徽砀山人,讲师,博士,主要从事开采沉陷与管道保护方面的工作。E-mail:caozz@hpu.edu.cn;郭帅房,1994年生,男,汉族,河南开封人,硕士研究生,主要从事输气管道力学分析方面的工作。E-mail:gshuaifang@163.com;徐平,1981年生,男,汉族,湖南南县人,副教授,博士,主要从事工程力学方面的研究工作。E-mail:xuping@hpu.edu.cn;陈家瑞,1986年生,男,汉族,江苏淮阴人,讲师,博士,主要从事开采沉陷与管道保护方面的研究工作。E-mail:chenjiarui@hyit.edu.cn
基金资助:
国家自然科学基金（51504081）；河南省高等学校重点科研项目资助计划（19A130001）；淮安市自然科学项目（HAB201708）；河南理工大学博士基金（B2018-65）

Coupled Interaction Mechanism Between Shallow-buried Gas Pipelines and Soil During Mining

CAO Zhengzheng¹, GUO Shuaifang¹, XU Ping¹, LIN Haixiao¹, CHEN Jiarui²

1. School of Civil Engineering, He'nan Polytechnic University, Jiaozuo, He'nan 454000, China;
2. Faculty of Architecture and Civil Engineering, Huaiyin Institute of Technology, Huaian, Jiangsu 223001, China

Received:2017-10-12 Online:2018-12-01 Published:2018-12-01

摘要/Abstract

摘要： 针对地下煤炭开采对采空沉陷区内浅埋输气管道变形破坏的采动影响，根据采动过程中埋地管道与土体相互作用的基本特征，将采动过程中管土相互作用划分为管土协同变形、管土暗悬空和管道明悬空3个阶段。根据各阶段中埋地管道的力学特征，分别采用弹性地基梁、均布载荷作用下的弹性梁和纵横弯曲弹性梁模型对非沉陷区的管道、沉陷区内处于协同变形的管道和沉陷区内处于悬空状态的管道进行力学分析，建立各阶段下埋地管道的分段弹性梁力学模型；并结合各分段弹性梁的边界条件，分析各阶段下管土相互作用的极限状态，得到埋地管道失效的临界判据，进而建立采动影响下浅埋输气管道与土体作用机理分析方法。

关键词: 埋地管道, 采空沉陷, 分段弹性梁, 协同变形, 悬空状态

Abstract: Underground coal mining can potentially induce deformation and destruction of shallow-buried gas pipelines in subsidence areas. Thus, this study analyzed the interactions between a pipeline and soil during mining activities and divided them into three types based on the fundamental characteristics of pipeline-soil interaction. These include collaborative pipeline-soil deformation, hidden pipeline-soil suspension, and apparent pipeline suspension. Depending on the mechanical characteristics of the buried pipeline in each type of interaction, an elastic foundation beam model, uniform loading elastic beam model, and twoway bending elastic beam model were used to analyze the mechanical behaviors of pipelines in a subsidence-free area, pipelines under collaborative deformation in a subsidence area, and pipelines suspended in a subsidence area, respectively. Based on this analysis, a segmented elastic beam mechanical model was developed for buried pipelines of each type. Combining the model with the corresponding boundary conditions, this study further analyzed the ultimate conditions of pipeline-soil interaction and the critical criterion for buried pipelines of each type. Finally, an analytical method for investigating the mechanism of interaction between shallow-buried gas pipelines and soil during mining was established.

Key words: buried pipeline, mining subsidence, the segmented elastic beam, coordinated deformation, suspended stage

中图分类号:

TE832

曹正正, 郭帅房, 徐平, 蔺海晓, 陈家瑞. 采动影响下浅埋输气管道与土体耦合作用机理[J]. 西南石油大学学报(自然科学版), 2018, 40(6): 139-147.

CAO Zhengzheng, GUO Shuaifang, XU Ping, LIN Haixiao, CHEN Jiarui. Coupled Interaction Mechanism Between Shallow-buried Gas Pipelines and Soil During Mining[J]. 西南石油大学学报(自然科学版), 2018, 40(6): 139-147.

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采动影响下浅埋输气管道与土体耦合作用机理

Coupled Interaction Mechanism Between Shallow-buried Gas Pipelines and Soil During Mining

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