季节性冻土层埋地管道围岩稳定性分析  

Stability Analysis of Rocks Around Buried Pipelines in Seasonal Permafrost Layers

作　　者：王志国[1,2] 曹静 赵越超[1,3] 韩强 杜佳华 滕振超[1,2] WANG Zhiguo;CAO Jing;ZHAO Yuechao:;HAN Qiang;DU Jiahua;TENG Zhenchao(School of Civil and Architecture Engineering,Northeast Petroleum University,Daqing Heilongjiang 163318,China;Heilongjiang Provincial Key Laboratory of Thermal Utilization and Disaster Reduction of New Energy in Cold Regions,Northeast Petroleum University,Daqing Heilongjiang 163318,China;NEPU Sanya Offshore Oil&Gas Research Institute,Sanya Hainan 572025,China;School of Civil Engineering,Dalian University of Technology,Dalian Liaoning 116024,China)

机构地区：[1]东北石油大学土木与建筑工程学院,黑龙江大庆1633182 [2]东北石油大学黑龙江省寒区新能源热利用及防灾减灾重点实验室,黑龙江大庆1633182 [3]东北石油大学三亚海洋油气研究院,海南三亚572025 [4]大连理工大学土木工程学院,辽宁大连116024

出　　处：《当代化工》2024年第4期925-933,共9页Contemporary Chemical Industry

基　　金：国家自然科学基金项目(项目编号:52076030);黑龙江省自然科学基金项目(项目编号:LH2022E032)。

摘　　要：中国作为世界冻土大国,近一半国土含有不同种类的冻土,在油气管道的敷设过程中冻土、冻岩问题不可避免,因此研究埋地管道周围岩石稳定性十分重要。弹性模量是分析及评价岩石结构完整性与稳定性的重要指标,埋地管道围岩宏观及微观组成结构及分布特征等对岩石弹性模量有重要影响,目前研究存在一定不足。基于多孔介质表征单元体方法,建立了饱和冻岩弹性模量计算模型。利用所建模型,以砂岩体结构为例进行了模拟计算,分析了孔隙率、含水率以及通道构成系数等变化对岩石弹性模量的影响特性。结果表明:模型的弹性模量随孔隙率的增大呈下降趋势;当孔隙率恒定时,弹性模量随含水量的增大而减小,随通道构成系数的增大而减小。As a big country of permafrost in the world,nearly half of China's land contains different kinds of permafrost,and the problems of permafrost and frozen rock are inevitable during the laying process of oil and gas pipelines,so it is very important to study the stability of the rocks around the buried pipelines.The modulus of elasticity is an important index for analyzing and evaluating the structural integrity and stability of rocks,and the macroscopic and microscopic composition,structure and distribution characteristics of the rocks around the buried pipelines have an important influence on the modulus of elasticity of the rocks,and there are certain deficiencies in the current research.A model for calculating the modulus of elasticity of rocks was developed based on the representative elementary volume method for porous media.Using the constructed model,simulations were carried out using the sandstone body structure as an example to analyze the characteristics of the influence of changes in porosity,water content,and channel composition coefficients on the elastic modulus of rocks.The results showed that the elastic modulus of the model tended to decrease with the increase of porosity;when the porosity was constant,the elastic modulus decreased with the increase of water content and decreased with the increase of channel composition factor.

关 键 词：埋地管道 弹性模量 表征单元体 多孔介质 季节性冻土层 

分 类 号：TU452[建筑科学—岩土工程]