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孟英杰1  ,  唐譜峰2  ,  徐冠豪1  ,   陳新武1  ,  李    娜1  ,  劉玉星2

 

( 1 .  北京市政路橋股份有限公司 ，北京 100068 ;  2.  北京科技大學 土木與資源工程學院 ，北京 100083)

摘   要 ：為探究臨近既有道路上車速 、車輛載重對深基坑開挖變形的影響 ， 以緊臨道路北京市地鐵 3 號線 地鐵深基坑開挖為工程背景 ，采用有限元數值分析方法 ，研究了車速 、車輛載重對深基坑車載側地表沉降及地 連墻水平位移的影響。結果表明：車速的變化對于地連墻水平位移的影響范圍在距地表 0 ~ 6 m 范圍內 ，且對地 連墻墻頂的影響最為明顯 ，當深度超過此范圍后 ，不同車速下地連墻水平位移無明顯差異 ；地表沉降最大值隨 著車速的增加而增加 ，但增大幅度隨著車速的提升逐漸減弱 ，在車速 40 ~ 50 km/h 時影響最為明顯。相較于車速 變化 ，車輛載重的變化對地連墻水平位移的影響范圍更大 ，車輛載重的影響程度顯著大于車速 ， 同時基坑地表 沉降隨著車輛載重的增加呈現出增大的規律。研究成果可為類似工程提供摻考。

關鍵詞：變形規律 ；車輛動荷載 ；車速 ；車輛載重

中圖分類號：TU463            文獻標志碼：A  

         

文章編號： 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

作者簡介：孟英杰  (1989—) ,  男 ，本科 ，工程師 ，研究方向：城市地下工程與空間施工技術。

收稿日期：2023 - 12 - 08