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孟英杰1  ,  唐谱峰2  ,  徐冠豪1  ,   陈新武1  ,  李    娜1  ,  刘玉星2

 

( 1 .  北京市政路桥股份有限公司 ，北京 100068 ;  2.  北京科技大学 土木与资源工程学院 ，北京 100083)

摘   要 ：为探究临近既有道路上车速 、车辆载重对深基坑开挖变形的影响 ， 以紧临道路北京市地铁 3 号线 地铁深基坑开挖为工程背景 ，采用有限元数值分析方法 ，研究了车速 、车辆载重对深基坑车载侧地表沉降及地 连墙水平位移的影响。结果表明：车速的变化对于地连墙水平位移的影响范围在距地表 0 ~ 6 m 范围内 ，且对地 连墙墙顶的影响最为明显 ，当深度超过此范围后 ，不同车速下地连墙水平位移无明显差异 ；地表沉降最大值随 着车速的增加而增加 ，但增大幅度随着车速的提升逐渐减弱 ，在车速 40 ~ 50 km/h 时影响最为明显。相较于车速 变化 ，车辆载重的变化对地连墙水平位移的影响范围更大 ，车辆载重的影响程度显著大于车速 ， 同时基坑地表 沉降随着车辆载重的增加呈现出增大的规律。研究成果可为类似工程提供掺考。

关键词：变形规律 ；车辆动荷载 ；车速 ；车辆载重

中图分类号：TU463            文献标志码：A  

         

文章编号： 1005- 8249   (2025)  03- 0149- 07 

DOI:10. 19860/j.cnki.issn1005 - 8249.2025 .03 .027

MENG Yingjie¹,TANG Pufeng²,XU Guanhao¹,CHEN Xinwu¹,LI Na,LIU Yuxing²

(1.Beijing Municipal Road Bridge Holding (Group) Co., Ltd., Beijing 100068, China; 

2. School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China )

 

[Abstract]  To explore the influence of vehicle speed and load on the deformation of deep foundation pits, this paper takes the excavation of a deep foundation pit for the Beijing Subway Line 3 adjacent to the road as the engineering background and uses the finite element numerical analysis method to study the influence of the above two factors on the surface settlement on the vehicle side and the horizontal displacement of the diaphragm wall. The results show that the influence range of vehicle speed on the horizontal displacement of the diaphragm wall is within 06 m from the ground surface, and the influence on the top of the diaphragm wall is the most obvious. When the depth exceeds this range, there is no significant difference in the horizontal displacement of the diaphragm wall under different vehicle speeds. The maximum surface settlement increases with the increase of vehicle speed, but the increase amplitude gradually weakens with the increase of vehicle speed. The influence is most obvious when the vehicle speed is 40-50 km/h. Compared to variations in vehicle speed, changes in vehicle load exert a more extensive impact on the lateral displacement of diaphragm walls. The influence of vehicle load is significantly greater than that of vehicle speed. Additionally, the surface settlement of foundation pits demonstrates an increasing trend proportional to the escalation of vehicle loads.

Key words： deformation law; vehicle dynamic load; vehicle speed; vehicle load

作者简介：孟英杰  (1989—) ,  男 ，本科 ，工程师 ，研究方向：城市地下工程与空间施工技术。

收稿日期：2023 - 12 - 08