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羅    鵬

（楊凌職業技術學院 交通與測繪工程分院 ，陜西 楊凌712100)

摘   要： 基于某地鐵站基坑的開挖工程，在考慮支護結構與土層之間相互作用前提下，采用ABAQUS 軟件進行二維平面有限元建模，通過計算分析施工過程中基坑周邊地表沉降 、支護連續墻水平位移與彎矩的變化， 同時對比分析實際監測結果與數值計算結果 。結果表明： 開挖過程對鄰近地表產生的影響較小，位移和沉降計  算值均處于相關規范的要求范圍內； 由數值模擬計算的基坑周邊地表最大沉降的計算值明顯小于監測值，支護 結構的最大水平位移大于監測值； 采用二維有限元計算結果與實際監測數據較為接近，驗證了數值模擬的有效性。

關鍵詞： 基坑開挖； 隧道； 沉降； 數值模擬

中圖分類號： TU41      

文獻標志碼： A      

文章編號： 1005-8249 (2023) 04-0015-05

DOI : 10. 19860/j.cnki.issn1005-8249.2023.04.003

LUO Peng

(Yangling Vocational and Technical College ’s Traffic and Mapping Engineering Branch, Yangling 712100, China)

Abstract：Based on a subway station foundation pit excavation project, considering the interaction between supporting structure and soil condition, using ABAQUS software to two-dimensional plane finite element modeling, through calculation and analysis in the construction of foundation pit supporting continuous wall surrounding the surface subsidence, horizontal displacement and bending moment of change, at the same time comparative analysis of the actual monitoring results and the numerical results. The results show that the excavation process has little influence on the adjacent surface, and the calculated values of displacement and settlement are within the requirements of relevant specifications. The calculated value of the maximum surface settlement around the foundation pit by numerical simulation is obviously smaller than the monitored value, and the maximum horizontal displacement of the supporting structure is larger than the monitored value. The two dimensional finite element calculation results are close to the actual monitoring data, which verifies the effectiveness of the numerical simulation.

Keywords：foundation pit excavation; tunnel; settlement; numerical simulation

? 基 金 項  目： 陜 西 省 職 業 技 術 教 育 學 會 （ 編 號： SGKCSZ2020-549) 。

作者簡介： 羅鵬 ( 1984—) , 男，碩士，講師，研究方向：道路與鐵道工程。