飽和軟黃土高水位地區深基坑鋼支撐軸力監測與分析*

張亞龍¹，張博望¹，張書敏²，宋奇昱² 

(1.中鐵七局集團西安鐵路工程有限公司，陜西 西安 710032；2.西安建筑科技大學土木工程學院，陜西 西安 710055)

［摘要］西安地鐵6號線東興區間豎井深基坑緊鄰興慶湖，處于西安飽和軟黃土的發育核心區域，因此深基坑工程支護結構既是工程的關鍵也是重難點。利用有限元軟件對深基坑組合支撐軸力進行預分析，結合現場監測數據進行對比，分析了深基坑施工過程中支撐軸力的動態變化趨勢以及軸力異常原因，并對深厚軟黃土地區深基坑開挖提出施工建議。

［關鍵詞］地鐵；飽和軟黃土；深基坑；支撐軸力；監測；數值模擬

［中圖分類號］TU753    ［文獻標識碼］A    ［文章編號］1002-8498(2021)04-0087-04

Monitoring and Analysis of the Axial Force of Steel Support for Deep Foundation Excavation in Saturated Soft Loess with High Water Level

ZHANG Yalong¹, ZHANG Bowang¹, ZHANG Shumin², SONG Qiyu² 

(1.Xi’an Railway Engineering Co., Ltd. of China Railway Seventh Group Co., Ltd., Xi’an, Shaanxi 710032, China; 2. College of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an, Shaanxi 710055, China)

Abstract: The deep foundation excavation of the shaft in Dongxing section of Xi’an Metro Line 6 is close to Xingqing Lake and located in the core area of saturated soft loess development in Xi’an. Therefore, the supporting structure of the deep foundation excavation project is both the key and the difficult part of the project. In this paper, the finite element software is used to pre analyze the axial force of deep foundation excavation, and the dynamic change trend of the axial force and the reasons for the abnormal axial force are analyzed by comparing the monitoring data in the field, and some construction suggestions for the deep foundation excavation in deep soft loess area are put forward.  

Keywords:subways; saturated soft loess; deep foundation excavation; axial forces; monitoring;  simulation

*陜西省重點研發計劃項目（2020SF-373）

［作者簡介］張亞龍，工程師，Email: 278716337@qq.com