地铁区间盾构隧道建筑限界核查新方法
狄仕磊
New Method of Architectural Clearance Verification for Metro Interval Shield Tunnel
DI Shilei
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作者信息:轨道交通工程信息化国家重点实验室（中铁一院）， 710043， 西安
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Affiliation:State Key Laboratory of Rail Transit Engineering Information (FSDI), 710043, Xi’an, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2023.08.049
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中图分类号/CLCN:U452.2+6
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栏目/Col:应用技术
摘要:
目的：地铁区间盾构隧道建筑限界核查工作，存在需人工识别线路曲线类型、限界计算结果准确率低、核查效率低、工作量大等问题。为此，需研究新的地铁区间盾构隧道建筑限界核查方法。方法：在地铁区间盾构隧道断面建立基准坐标系，在隧道内壁选择测点，读取测点处测量数据信息；利用盾构圆形隧道内壁轮廓几何关系计算顶部和底部的测点处高程理论值及左右两侧测点处的横距理论值，并利用内插法计算缓和曲线段偏移量；利用高程理论值、横距理论值及偏移量来计算每个测点的建筑限界；将计算出的建筑限界和测量数据相比较，进而判断该隧道断面是否有测点侵界。介绍了基于该建筑限界核查方法开发的地铁区间盾构隧道建筑限界核查软件，并用实际工程数据进行测试。结果及结论：工程数据测试结果表明，建筑限界核查软件能快速准确地读取限界测量数据、计算缓和曲线偏移量、计算建筑限界设计值、进行限界核查、自动生成核查结果及输出核查报告等，有效地提高了限界核查的准确率及核查效率，使核查时间缩短80%以上。
Abstracts:
Objective: The current verification work of metro interval shield tunnel architectural clearance has problems such as manual identification of track curve types, low accuracy of clearance calculation results, low verification efficiency and heavy workload. Therefore, a new method of architectural clearance verification for metro interval shield tunnel needs to be studied. Method: A reference coordinate system is established for metro shield interval tunnel crosssection, and measurement data at selected points on tunnel inner wall are collected. Using the geometric relationship of shield circular tunnel inner wall profile, the theoretical values of elevation at the top and bottom measuring points, as well as the theoretical values of horizontal distance at the left and right measuring points, are calculated. And transition curve offsets are calculated using interpolation method. The architectural clearance for each measuring point is calculated based on the theoretical elevation values, horizontal distance values, and offsets. The calculated architectural clearances are compared with the fieldmeasured data to determine if any encroachments exist in the tunnel crosssection. Based on a software tool for metro interval shield tunnel architectural clearance verification developed by this method, tests are carried out using actual engineering data. Result & Conclusion: The engineering data test results demonstrate that the architectural clearance verification software can quickly and accurately read clearance measurement data, calculate transition curve offsets, compute design values for architectural clearances, perform clearance verification, generate verification results automatically, and delivery verification reports. This method significantly improves the accuracy and efficiency of clearance verification, reducing over 80% of verification time.
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