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         刘   安1  ,  杨靖华1  ,  邢一鸣3  ,  张坤勇2 , 3

 

( 1 .  中交第三航务工程局有限公司南京分公司 ，南京 210009 ;  2.  河海大学 岩土力学与堤坝工程教育部

重点实验室 ，南京 210024 ;  3 .  河海大学岩土工程科学研究所 ，南京 210024)

摘   要 ：为了研究南京软土地区深基坑开挖对邻近地下管线力学行为的影响 ，考虑基坑开挖过程中的复杂 条件 ，采用数值模拟方法分析了地下管线在不同情况下的变形规律。结果表明：地下管线竖向位移和弯矩呈现 对称分布形式 ，在基坑开挖对称面上达到峰值 ；揭示了管线直径 、管线材质 、距基坑边缘水平距离对管线力学 行为的影响规律 ；管线与基坑边缘的水平距离增加时 ，管线的位移和弯矩呈现先增大后减小的趋势 ，在距离约 为基坑开挖深度的 0. 5 倍时 ，管线的位移和弯矩达到最大值。通过对这些关键参数的深入研究 ，可以有效地指 导实际工程中的管线保护与监测工作 ，保障地下管线的安全与稳定。

关键词：基坑开挖 ；管线 ；数值模拟 ；单因素分析

中图分类号：TU473 . 2           文献标志码：A   

         

文章编号： 1005- 8249   (2025)  03- 0078- 06 

DOI:10. 19860/j.cnki.issn1005 - 8249.2025 .03 .015

LIU An¹,YANG Jinghua¹,XING Yiming³,ZHANG Kunyong^2,3

(1. Nanjing Branch of CCCC Third Harbor Engineering Bureau Co., Ltd., Nanjing, 210009, China;

2. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University , Nanjing, 210024,China;

3. Geotechnical Engineering Institute of Hohai University, Nanjing, 210024,China）

Abstract: In order to study the influence of deep foundation pit excavation on the mechanical behavior of adjacent underground pipelines in the soft soil area of Nanjing, the deformation law of underground pipelines in different situations is analyzed by numerical simulation method considering the complex conditions in the process of foundation pit excavation. The results show that: the vertical displacement and bending moment of the underground pipeline show symmetrical distribution, and reach the peak value on the symmetrical surface of the pit excavation; the influence of pipeline diameter, pipeline material, and horizontal distance from the edge of the pit on the mechanical behavior of the pipeline is revealed; when the horizontal distance between the pipeline and the edge of the pit is increased, the displacement and bending moment of the pipeline show the tendency to increase firstly and then decrease, and the displacement and bending moment of the pipeline reach the maximum value at the distance of 0.5 times of the depth of the pit excavation. At a distance of about 0.5 times of the pit excavation depth, the displacement and bending moment of the pipeline reach the maximum value. Through the in-depth study of these key parameters, it can effectively guide the pipeline protection and monitoring work in the actual project to ensure the safety and stability of underground pipelines.

Keywords: foundation pit excavation; pipeline; numerical simulation; single factor analysis

基金项目： 国家自然科学基金资助项目  (51608170) 。

作者简介：刘   安  (1992—) ,  男 ，本科 ，工程师 ，研究方向：深基坑施工等方面。

通信作者：邢一鸣  (2001 —) ,  男 ，硕士研究生 ，研究方向： 土的基本特性 、土与结构相互作用及岩土工程数值分析等方面。

收稿日期：2024 - 07 - 10