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刘小锐¹  ,  张    晗²

 

( 1 .  北京市建设工程质量第三检测所有限责任公司 ，北京 100037 ;  2.  北京市市政工程研究院 ，北京 100037)

摘   要 ：地铁隧道施工会对地表上既有建筑物、城市道路交通设施等结构的安全产生不利影响，地铁隧道 施工前需评价既有道路设施的状态。目前地铁施工前影响范围的构筑物如有结构安全隐患，往往不加分析的进 行结构加固处置，造成了费用的增加与工期的延迟，甚至产生不良的社会影响。以北京地铁 12 号线某区间工程为例，采用 FLAC 3D 数值模拟对地铁盾构下穿严重倾斜的既有装配式挡墙的影响进行分析。结果表明：盾构下 穿既有挡墙虽有部分严重倾斜，但模拟结果显示安全，施工后验证了挡墙无新增倾斜及其他变形， 因此在实际 工程中可根据挡墙的形式及浇筑方式综合确定是否进行预加固处理。

关键词： 隧道下穿施工 ；严重倾斜挡墙 ；变形影响分析 ；加固措施

中图分类号：TU375            

文献标志码：A           

文章编号： 1005- 8249   (2025)  01- 0145- 05 

DOI:10. 19860/j.cnki.issn1005 - 8249.2025 .01 .027

 

LIU Xiaorui ¹  ,  ZHANG Han²

(1 . Beijing Construction Quality 3rd Text Limited Liability Company ,  Beijing 100037 ,  China;

2. Beijing Municipal Engineering Research Institute ,  Beijing 100037 ,  China )

Abstract：The construction of subway tunnel will have an adverse effect on the deformation of the superstructure. And the structural safety state of the surface structure before construction has a safety consideration for the construction of the tunnel project, and even determines the feasibility of the project implementation. Before subway construction, it is necessary to evaluate the status of existing road facilities. At present, if there are structural safety hazards in the structures before subway construction, structural reinforcement and disposal are often carried out without analysis, resulting in increased costs and delays in construction period, and even adverse social impacts.. Taking the section of Hepingxiqiao Station ~ Guangximen Station of Beijing Metro Line 12 as an example, this paper analyzed the causes of the serious inclination of the existing prefabricated retaining wall based on the radar and total station detection data, and analyzed the influence of the construction of the subway section on the deformation of the retaining wall based on the continuous medium dynamics analysis software FLAC. It will avoid the existing measures of reinforcement when the inclination exceeds the standard, and save investment and construction period.

Key words：tunnel underpass construction; seriously inclined retaining wall; deformation impact analysis;  reinforcement measures

作者简介： 刘小锐  (1988—)   女，硕士， 工程师，研究方向 ：工程结构检测、鉴定、监测、评估、加固改造、分析咨询等。

收稿日期：2023 - 06 - 22