Article(id=1149743084973502820, tenantId=1146029695717560320, journalId=1146031787341344770, issueId=1149743083069288795, articleNumber=1003-3033(2024)06-0057-08, orderNo=null, doi=10.16265/j.cnki.issn1003-3033.2024.06.1734, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1701964800000, receivedDateStr=2023-12-08, revisedDate=1710950400000, revisedDateStr=2024-03-21, acceptedDate=null, acceptedDateStr=null, onlineDate=1752049712651, onlineDateStr=2025-07-09, pubDate=1719504000000, pubDateStr=2024-06-28, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1752049712651, onlineIssueDateStr=2025-07-09, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1752049712651, creator=13701087609, updateTime=1752049712651, updator=13701087609, issue=Issue{id=1149743083069288795, tenantId=1146029695717560320, journalId=1146031787341344770, year='2024', volume='34', issue='6', pageStart='1', pageEnd='252', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=0, createTime=1752049712197, creator=13701087609, updateTime=1756468919644, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1168278582599098697, tenantId=1146029695717560320, journalId=1146031787341344770, issueId=1149743083069288795, language=EN, specialIssueTitle=, coverIllustrator=, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1168278582599098698, tenantId=1146029695717560320, journalId=1146031787341344770, issueId=1149743083069288795, language=CN, specialIssueTitle=, coverIllustrator=, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=57, endPage=64, ext={EN=ArticleExt(id=1149743085162246501, articleId=1149743084973502820, tenantId=1146029695717560320, journalId=1146031787341344770, language=EN, title=Multi-objective prediction optimization for large-diameter slurry shield tunneling construction based on CatBoost-MOEAD, columnId=1149733269173878863, journalTitle=China Safety Science Journal, columnName=Safety engineering technology, runingTitle=null, highlight=null, articleAbstract=

To effectively optimize the shield construction parameters and achieve the goals of safety,efficiency,and energy-saving in the large-diameter slurry shield tunneling process,a hybrid intelligent algorithm combining categorical boosting (CatBoost) and decomposition was proposed based on a multi-objective evolutionary algorithm (MOEAD). The main shield construction parameters were set as the major research objects considering shield construction parameters and geological conditions,and the surface settlement,penetration rate,and tunneling-specific energy were determined as the prediction and control objectives. Moreover,the selected shield construction parameters were optimized,and a line of Wuhan rail transit was used to validate the hybrid algorithm performance. The results showed that the proposed CatBoost algorithm had great prediction performance for large-diameter slurry shields with the fitting accuracy (R2) of the three control objectives more than 0.9. The model's importance rank indicated that the total propulsion force and propulsion speed of the large-diameter slurry shield had significant influences on surface settlement,penetration,and tunneling-specific energy. The proposed CatBoost-MOEAD hybrid intelligent algorithm had an obvious optimization effect on the three control objectives,and the optimization ranges of surface settlement,penetration rate,and tunneling-specific energy reached 12.35%,7.47%,and 10.70%,respectively. Moreover,the control ranges of corresponding shield construction parameters were presented.

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为有效优化盾构施工参数,实现在大直径泥水盾构掘进过程中安全、高效和节能的目标,提出分类助推(CatBoost)和基于分解的多目标进化算法(MOEAD)相结合的混合智能算法;综合考虑盾构施工参数与地质条件,以主要的盾构施工参数为研究对象,选择地表沉降、贯入度和掘进比能为预测和控制目标;优化调控选择的盾构施工参数,并以武汉市轨道交通某号线为例,验证该混合算法的有效性。结果表明:采用CatBoost算法建立的预测模型在大直径泥水盾构上表现出来的预测性能良好,对3个控制目标的拟合精度(R2)均达到0.9以上;预测模型的重要性排序表明:大直径泥水盾构的总推进力和推进速度对地表沉降、贯入度和掘进比能有显著影响;所提出的CatBoost-MOEAD混合智能算法对3个控制目标的优化效果明显,地表沉降、贯入度和掘进比能分别达到12.35%、7.47%和10.70% 的优化幅度,并给出相应盾构施工参数的控制范围。

, correspAuthors=苏飞鸣, authorNote=null, correspAuthorsNote=
**苏飞鸣(1997—),广西南宁人,男,博士研究生,研究方向为土木工程建造与管理。E-mail:
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吴贤国 (1964—),女,湖北武汉人,博士,教授,主要从事数字工程集成建设关键技术及应用、隧道工程施工与运营安全监控等方面的研究。E-mail:

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吴贤国 (1964—),女,湖北武汉人,博士,教授,主要从事数字工程集成建设关键技术及应用、隧道工程施工与运营安全监控等方面的研究。E-mail:

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吴贤国 (1964—),女,湖北武汉人,博士,教授,主要从事数字工程集成建设关键技术及应用、隧道工程施工与运营安全监控等方面的研究。E-mail:

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Prediction and control of tunneling-induced settlement using machine learning algorithms[D]. Changsha: Hunan University, 2019., articleTitle=null, refAbstract=null), Reference(id=1168181713491473320, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149743084973502820, doi=null, pmid=null, pmcid=null, year=2021, volume=13, issue=6, pageStart=1274, pageEnd=89, url=null, language=null, rfNumber=[24], rfOrder=35, authorNames=TANG Libin, NA Seonhong, journalName=Journal of Rock Mechanics and Geotechnical Engineering, refType=null, unstructuredReference=TANG Libin, NA Seonhong. Comparison of machine learning methods for ground settlement prediction with different tunneling datasets[J]. Journal of Rock Mechanics and Geotechnical Engineering, 2021, 13(6):1274-89., articleTitle=Comparison of machine learning methods for ground settlement prediction with different tunneling datasets, refAbstract=null), Reference(id=1168181713709577129, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149743084973502820, doi=null, pmid=null, pmcid=null, year=2023, volume=33, issue=增1, pageStart=119, pageEnd=127, url=null, language=null, rfNumber=[25], rfOrder=36, authorNames=阮顺领, 韩思淼, 张宁宁, journalName=中国安全科学学报, refType=null, unstructuredReference=阮顺领, 韩思淼, 张宁宁, 等. 基于CNN-aGRU融合模型的尾矿坝浸润线预测方法[J]. 中国安全科学学报, 2023, 33(增1):119-127., articleTitle=基于CNN-aGRU融合模型的尾矿坝浸润线预测方法, refAbstract=null), Reference(id=1168181713818629034, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149743084973502820, doi=null, pmid=null, pmcid=null, year=2023, volume=33, issue=S1, pageStart=119, pageEnd=127, url=null, language=null, rfNumber=[25], rfOrder=37, authorNames=RUAN Shunling, HAN Simiao, ZHANG Ningning, journalName=China Safety Science Journal, refType=null, unstructuredReference=RUAN Shunling, HAN Simiao, ZHANG Ningning, et al. Prediction method of saturation line of tailings dam based on CNN-aGRU fusion model[J]. China Safety Science Journal, 2023, 33(S1):119-127., articleTitle=Prediction method of saturation line of tailings dam based on CNN-aGRU fusion model, refAbstract=null)], funds=[Fund(id=1168181709754348417, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149743084973502820, awardId=51378235, language=CN, fundingSource=国家自然科学基金资助(51378235), fundOrder=null, country=null), Fund(id=1168181709813068674, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149743084973502820, awardId=71571078, language=CN, fundingSource=国家自然科学基金资助(71571078), fundOrder=null, country=null), Fund(id=1168181709867594627, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149743084973502820, awardId=51308240, language=CN, fundingSource=国家自然科学基金资助(51308240), fundOrder=null, country=null), Fund(id=1168181709959869316, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149743084973502820, awardId=2016YFC0800208, language=CN, fundingSource=国家重点研发计划项目(2016YFC0800208), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1168181705274831686, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149743084973502820, xref=1, ext=[AuthorCompanyExt(id=1168181705295803207, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149743084973502820, companyId=1168181705274831686, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=1 School of Civil and Hydraulic Engineering,Huazhong University of Science and Technology,Wuhan Hubei 430074,China), AuthorCompanyExt(id=1168181705316774728, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149743084973502820, companyId=1168181705274831686, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=1 华中科技大学 土木与水利工程学院,湖北 武汉 430074)]), AuthorCompany(id=1168181705409049417, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149743084973502820, xref=2, ext=[AuthorCompanyExt(id=1168181705417438026, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149743084973502820, companyId=1168181705409049417, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=2 Department of Building and Real Estate,The Hong Kong Polytechnic University,Hong Kong 999077,China), AuthorCompanyExt(id=1168181705446798155, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149743084973502820, companyId=1168181705409049417, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=2 香港理工大学 建筑与房地产学部,香港 999077)])], figs=[ArticleFig(id=1168181707975963503, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149743084973502820, language=EN, label=Fig.1, caption=Model simulations, figureFileSmall=9dwl3HfZysktDp4fgNXaRQ==, figureFileBig=mcqFKu4UO4Ik4xLUUVCntQ==, tableContent=null), ArticleFig(id=1168181708059849584, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149743084973502820, language=CN, label=图1, caption=预测模型的预测结果, figureFileSmall=9dwl3HfZysktDp4fgNXaRQ==, figureFileBig=mcqFKu4UO4Ik4xLUUVCntQ==, tableContent=null), ArticleFig(id=1168181708114375537, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149743084973502820, language=EN, label=Fig.2, caption=Importance rank of three output variables, figureFileSmall=VUlbyWbz1ZrcwfGzC5WAdQ==, figureFileBig=sZONR8AoDkG3pqi5QVpwHQ==, tableContent=null), ArticleFig(id=1168181708189873010, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149743084973502820, language=CN, label=图2, caption=3个输出变量的重要性排序, figureFileSmall=VUlbyWbz1ZrcwfGzC5WAdQ==, figureFileBig=sZONR8AoDkG3pqi5QVpwHQ==, tableContent=null), ArticleFig(id=1168181708277953395, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149743084973502820, language=EN, label=Fig.3, caption=Pareto front solution set and ideal point, figureFileSmall=Do9N1wLpdCZLUkg8+4mKlg==, figureFileBig=A4KFRHJ3+Q9Ws1/tiB7TXw==, tableContent=null), ArticleFig(id=1168181708399588212, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149743084973502820, language=CN, label=图3, caption=Pareto前沿解集和理想点, figureFileSmall=Do9N1wLpdCZLUkg8+4mKlg==, figureFileBig=A4KFRHJ3+Q9Ws1/tiB7TXw==, tableContent=null), ArticleFig(id=1168181708454114165, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149743084973502820, language=EN, label=Table 1, caption=

Soil properties

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岩土
编号
岩土
名称
黏聚力/
kPa
内摩擦
角/(°)
压缩模
量/MPa
1-1 杂填土 14.8 9.3 2.84
2-4 粉质黏土 18.8 9.2 10.43
3-2 粉质黏土 14.4 6.0 4.40
3-2b 粉砂 29.4 36.9 15.19
4-21 粉细砂 21.3 37.1 11.31
), ArticleFig(id=1168181708538000246, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149743084973502820, language=CN, label=表1, caption=

土体性能指标

, figureFileSmall=null, figureFileBig=null, tableContent=
岩土
编号
岩土
名称
黏聚力/
kPa
内摩擦
角/(°)
压缩模
量/MPa
1-1 杂填土 14.8 9.3 2.84
2-4 粉质黏土 18.8 9.2 10.43
3-2 粉质黏土 14.4 6.0 4.40
3-2b 粉砂 29.4 36.9 15.19
4-21 粉细砂 21.3 37.1 11.31
), ArticleFig(id=1168181708626080631, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149743084973502820, language=EN, label=Table 2, caption=

Detailed information on shield tunneling construction parameters

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参数 最大值 最小值 平均值
x1/(mm·min-1) 36.17 24.21 29.32
x2/(rad·min-1) 1.28 1.16 1.23
x3/kN 61 140.00 43 313.37 54 309.21
x4/(kN·m) 4 014.84 1 780.01. 2 575.85
x5/MPa 0.018 0.012 0.015 6
x6MPa 0.516 0.032 0.316 0
x7/m3 3 013.00 2 248.64 2 663.10
x8/m3 3 110.35 2 313.33 2 795.98
x9/MPa 0.380 0.283 0.338
x10/MPa 0.368 0.294 0.311
x11/(°) 4.13 -10.07 -4.22
x12/(°) 14.08 7.44 10.77
x13/kPa 25.35 13.67 19.49
x14/MPa 10.77 6.92 8.21
x15/m 18.60 17.61 18.11
y1/mm 2.37 -11.33 -1.62
y2/mm 26.95 17.72 24.96
y3/(kJ·m-3) 522.22 420.50 455.12
), ArticleFig(id=1168181708688995192, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149743084973502820, language=CN, label=表2, caption=

盾构施工参数的详细信息

, figureFileSmall=null, figureFileBig=null, tableContent=
参数 最大值 最小值 平均值
x1/(mm·min-1) 36.17 24.21 29.32
x2/(rad·min-1) 1.28 1.16 1.23
x3/kN 61 140.00 43 313.37 54 309.21
x4/(kN·m) 4 014.84 1 780.01. 2 575.85
x5/MPa 0.018 0.012 0.015 6
x6MPa 0.516 0.032 0.316 0
x7/m3 3 013.00 2 248.64 2 663.10
x8/m3 3 110.35 2 313.33 2 795.98
x9/MPa 0.380 0.283 0.338
x10/MPa 0.368 0.294 0.311
x11/(°) 4.13 -10.07 -4.22
x12/(°) 14.08 7.44 10.77
x13/kPa 25.35 13.67 19.49
x14/MPa 10.77 6.92 8.21
x15/m 18.60 17.61 18.11
y1/mm 2.37 -11.33 -1.62
y2/mm 26.95 17.72 24.96
y3/(kJ·m-3) 522.22 420.50 455.12
), ArticleFig(id=1168181708827407225, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149743084973502820, language=EN, label=Table 3, caption=

Hyperparameter optimization results of CatBoost model

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超参数 搜索范围 优化结果
地表沉降 贯入度 掘进比能
max_depth (4,8) 4 4 4
l2_leaf_reg (3,9) 9 3 3
learning rate (0.01,0.5) 0.01 0.1 0.03
), ArticleFig(id=1168181708919681914, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149743084973502820, language=CN, label=表3, caption=

CatBoost算法的超参选择结果

, figureFileSmall=null, figureFileBig=null, tableContent=
超参数 搜索范围 优化结果
地表沉降 贯入度 掘进比能
max_depth (4,8) 4 4 4
l2_leaf_reg (3,9) 9 3 3
learning rate (0.01,0.5) 0.01 0.1 0.03
), ArticleFig(id=1168181709020345211, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149743084973502820, language=EN, label=Table 4, caption=

Selected construction parameter range

, figureFileSmall=null, figureFileBig=null, tableContent=
输入参数 参数范围 输入参数 参数范围
x1/(mm·min-1) [0,80] x4/(kN·m) [0,8 000]
x2/(rad·min-1) [0,7.6] x10/MPa [0,0.6]
x3/(kN) [0,90 000] x11/(°) [-8,8]
), ArticleFig(id=1168181709175534460, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149743084973502820, language=CN, label=表4, caption=

所选施工参数范围

, figureFileSmall=null, figureFileBig=null, tableContent=
输入参数 参数范围 输入参数 参数范围
x1/(mm·min-1) [0,80] x4/(kN·m) [0,8 000]
x2/(rad·min-1) [0,7.6] x10/MPa [0,0.6]
x3/(kN) [0,90 000] x11/(°) [-8,8]
), ArticleFig(id=1168181709309752189, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149743084973502820, language=EN, label=Table 5, caption=

Optimization result summary

, figureFileSmall=null, figureFileBig=null, tableContent=
数据 地表沉
降/mm
贯入度/
mm
掘进比能/
(kJ·m-3)
原始数据平均值 -1.62 24.96 455.12
优化结果平均值 -1.42
(12.35%)
26.82
(7.47%)
406.39
(10.71%)
理想点取值 -1.33
(17.90%)
25.99
(4.13%)
404.70
(11.08%)
), ArticleFig(id=1168181709439775614, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149743084973502820, language=CN, label=表5, caption=

优化结果汇总

, figureFileSmall=null, figureFileBig=null, tableContent=
数据 地表沉
降/mm
贯入度/
mm
掘进比能/
(kJ·m-3)
原始数据平均值 -1.62 24.96 455.12
优化结果平均值 -1.42
(12.35%)
26.82
(7.47%)
406.39
(10.71%)
理想点取值 -1.33
(17.90%)
25.99
(4.13%)
404.70
(11.08%)
), ArticleFig(id=1168181709532050303, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149743084973502820, language=EN, label=Table 6, caption=

Optimized construction parameter range

, figureFileSmall=null, figureFileBig=null, tableContent=
参数 优化前 优化后
x1/(mm·min-1) [24.21,36.17] [30.80,34.17]
x2/(rad·min-1) [1.16,1.28] [1.16,1.25]
x3/kN [43 313.37,
61 140.00]
[49 683,
49 880.26]
x4/(kN·m) [1 780.01,
4 014.84]
[2 023.65,
2 370.62]
x10/MPa [0.294,0.368] [0.297,0.312]
x11/(°) [-10.07,4.13] [-5.51,3.68]
), ArticleFig(id=1168181709590770560, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149743084973502820, language=CN, label=表6, caption=

优化后的施工参数范围

, figureFileSmall=null, figureFileBig=null, tableContent=
参数 优化前 优化后
x1/(mm·min-1) [24.21,36.17] [30.80,34.17]
x2/(rad·min-1) [1.16,1.28] [1.16,1.25]
x3/kN [43 313.37,
61 140.00]
[49 683,
49 880.26]
x4/(kN·m) [1 780.01,
4 014.84]
[2 023.65,
2 370.62]
x10/MPa [0.294,0.368] [0.297,0.312]
x11/(°) [-10.07,4.13] [-5.51,3.68]
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基于CatBoost-MOEAD的大直径泥水盾构施工多目标预测优化
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吴贤国 1 , 刘俊 1 , 苏飞鸣 1, ** , 陈虹宇 2 , 冯宗宝 1
中国安全科学学报 | 安全工程技术 2024,34(6): 57-64
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中国安全科学学报 | 安全工程技术 2024, 34(6): 57-64
基于CatBoost-MOEAD的大直径泥水盾构施工多目标预测优化
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吴贤国1 , 刘俊1, 苏飞鸣1, ** , 陈虹宇2, 冯宗宝1
作者信息
  • 1 华中科技大学 土木与水利工程学院,湖北 武汉 430074
  • 2 香港理工大学 建筑与房地产学部,香港 999077
  • 吴贤国 (1964—),女,湖北武汉人,博士,教授,主要从事数字工程集成建设关键技术及应用、隧道工程施工与运营安全监控等方面的研究。E-mail:

通讯作者:

**苏飞鸣(1997—),广西南宁人,男,博士研究生,研究方向为土木工程建造与管理。E-mail:
Multi-objective prediction optimization for large-diameter slurry shield tunneling construction based on CatBoost-MOEAD
Xianguo WU1 , Jun LIU1, Feiming SU1, ** , Hongyu CHEN2, Zongbao FENG1
Affiliations
  • 1 School of Civil and Hydraulic Engineering,Huazhong University of Science and Technology,Wuhan Hubei 430074,China
  • 2 Department of Building and Real Estate,The Hong Kong Polytechnic University,Hong Kong 999077,China
出版时间: 2024-06-28 doi: 10.16265/j.cnki.issn1003-3033.2024.06.1734
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为有效优化盾构施工参数,实现在大直径泥水盾构掘进过程中安全、高效和节能的目标,提出分类助推(CatBoost)和基于分解的多目标进化算法(MOEAD)相结合的混合智能算法;综合考虑盾构施工参数与地质条件,以主要的盾构施工参数为研究对象,选择地表沉降、贯入度和掘进比能为预测和控制目标;优化调控选择的盾构施工参数,并以武汉市轨道交通某号线为例,验证该混合算法的有效性。结果表明:采用CatBoost算法建立的预测模型在大直径泥水盾构上表现出来的预测性能良好,对3个控制目标的拟合精度(R2)均达到0.9以上;预测模型的重要性排序表明:大直径泥水盾构的总推进力和推进速度对地表沉降、贯入度和掘进比能有显著影响;所提出的CatBoost-MOEAD混合智能算法对3个控制目标的优化效果明显,地表沉降、贯入度和掘进比能分别达到12.35%、7.47%和10.70% 的优化幅度,并给出相应盾构施工参数的控制范围。

大直径泥水盾构  /  分类助推(CatBoost)  /  基于分解的多目标进化算法(MOEAD)  /  多目标优化  /  地表沉降

To effectively optimize the shield construction parameters and achieve the goals of safety,efficiency,and energy-saving in the large-diameter slurry shield tunneling process,a hybrid intelligent algorithm combining categorical boosting (CatBoost) and decomposition was proposed based on a multi-objective evolutionary algorithm (MOEAD). The main shield construction parameters were set as the major research objects considering shield construction parameters and geological conditions,and the surface settlement,penetration rate,and tunneling-specific energy were determined as the prediction and control objectives. Moreover,the selected shield construction parameters were optimized,and a line of Wuhan rail transit was used to validate the hybrid algorithm performance. The results showed that the proposed CatBoost algorithm had great prediction performance for large-diameter slurry shields with the fitting accuracy (R2) of the three control objectives more than 0.9. The model's importance rank indicated that the total propulsion force and propulsion speed of the large-diameter slurry shield had significant influences on surface settlement,penetration,and tunneling-specific energy. The proposed CatBoost-MOEAD hybrid intelligent algorithm had an obvious optimization effect on the three control objectives,and the optimization ranges of surface settlement,penetration rate,and tunneling-specific energy reached 12.35%,7.47%,and 10.70%,respectively. Moreover,the control ranges of corresponding shield construction parameters were presented.

large-diameter slurry shield  /  categorical boosting (CatBoost)  /  multi-objective evolutionary algorithm based on decomposition (MOEAD)  /  multi-objective optimization  /  surface settlement
吴贤国, 刘俊, 苏飞鸣, 陈虹宇, 冯宗宝. 基于CatBoost-MOEAD的大直径泥水盾构施工多目标预测优化. 中国安全科学学报, 2024 , 34 (6) : 57 -64 . DOI: 10.16265/j.cnki.issn1003-3033.2024.06.1734
Xianguo WU, Jun LIU, Feiming SU, Hongyu CHEN, Zongbao FENG. Multi-objective prediction optimization for large-diameter slurry shield tunneling construction based on CatBoost-MOEAD[J]. China Safety Science Journal, 2024 , 34 (6) : 57 -64 . DOI: 10.16265/j.cnki.issn1003-3033.2024.06.1734
随着跨江和跨海隧道工程的兴起,直径大于10.0m的大盾构在工程中越来越常见[1]。在大盾构隧道施工过程中,由大盾构施工对隧道周围土层的扰动和尾部空洞的体积损失会不可避免地引起地表沉降[2]。贯入度是指大盾构掘进过程中刀盘前端进入土体的深度,不同的贯入度不仅影响着大盾构的施工效率与经济性,而且还会影响大盾构在掘进过程中产生的地表沉降量[3]。盾构机能耗通常使用掘进比能进行描述,即盾构掘进单位体积土体所消耗的能量,它影响着大盾构的土体掘进能力和项目施工周期[4]。因此,为安全高效地进行隧道开挖,需要准确预测和控制隧道开挖引起的地表沉降量,并及时调整和控制大盾构的贯入度和掘进比能。
传统的地表沉降、贯入度和掘进比能预测方法主要有经验公式[5]、模型试验[6]和数值模拟[7]。这些方法在特定工程中描述地表沉降的一般形态,但是都存在一定的固有缺陷。PECK等[8]在大量工程实践的基础上提出预测地表沉降一般形式的经验公式,但由于岩土工程地质条件的不确定性,公式中的参数在不同地质条件下往往存在较大的变异性。LIU Xinrong等[9]以Moher库仑为本构模型,研究了模型试验结果中2种情况下3个隧道之间相互作用的影响,发现模拟结果与实际数据有较好的一致性。然而,数值模拟法得到预测结果需要作出很多假设,且存在考虑因素有限、结果难以解释等缺点。LI Liping等[10]开发了一套用于研究进水演变的试验系统,并在工程现场验证了所研发设备的稳定性,但模型试验法成本较高且目前还没有合理的方法来模拟盾构隧道施工过程。
如今工程和建筑行业正在经历一场由日益增长的数字化和自动化推动的技术革命[11]。为克服传统方法的局限性并提高地下施工过程的安全和可靠性,实现实时预测盾构掘进引起的地表沉降,贯入度和掘进比能及时给出参数调整方案,机器学习方法已被广泛用于盾构研究中。方诗圣等[12]使用6种机器学习算法预测了盾构掘进沿线地表最大沉降。SHAN Feng等[13]使用循环神经网络从历史数据中预测未来的隧道掘进机贯入度;ELBAZ等[14]开发了一种深度学习网络预测盾构掘进系统中的刀盘驱动能耗。考虑到在实际工程中仅考虑对单一目标进行控制是不够的,在确保施工安全的同时还需要考虑工期和成本问题;吴贤国等[15]建立了随机森林与非支配排序遗传算法相结合的多目标优化模型,通过控制施工参数显著优化地表沉降和刀盘磨损;曾铁梅等[16]提出一种将遗传算法、最小二乘支持向量机与第二代非支配排序遗传算法相结合的多目标优化模型,以研究对盾构下穿的既有隧道的安全影响和变形控制。通过上述研究发现,单目标或双目标的优化方法可取得满足工程要求的结果。然而,在实际应用中,可能需要考虑更多因素,且还需要在保证安全和绿色施工要求的同时保证施工效率。考虑到基于分解的多目标进化算法(Multi-Objective Evolutionary Algorithm based on Decomposition,MOEAD)可将一个多目标优化问题转换为多个标量子问题,在收敛速度和处理形状更复杂的帕累托(Pareto)解集上更具优势[17]。因此,将MOEAD应用于大盾构可能更有利于实时监测和优化大盾构掘进过程。
鉴于此,笔者拟提出一种基于CatBoost-MOEAD算法的大直径泥水盾构施工参数多目标智能优化方法,确定大直径泥水盾构施工参数合理控制范围,并以武汉市地铁某号线为例进行验证,以期为实际大直径泥水盾构的高效绿色施工提供理论依据和指导。
CatBoost是一种基于对称决策树为基学习器实现的参数较少、支持类别型变量和高准确性的梯度提升树(Gradient Boosting Decision Tree,GBDT)框架[18]。CatBoost使用基于统计学习的方法来处理类别特征,可高效合理地处理类别型特征,从而提高模型的准确性。CatBoost具有内置的正则化和早停策略,解决了梯度偏差以及预测偏移的问题,从而减少过拟合的发生,提高算法的准确性和泛化能力。与其他基于GBDT的算法不同,CatBoost采用随机排列,计算并分配具有相似类别值的样本的平均分类值,并用给定的排列进行替换。假设给定一个排列组合 [ σ 1 σ 2 σ n ] T n,CatBoost会将其替换为如下等式:
X σ p q = j = 1 p - 1 [ X σ j q = X σ p q ] · Y σ j + β P j = 1 p - 1 [ X σ j q = X σ p q ] β
式中: X σ p q为特征 σ p的第q个训练值; X σ j q为特征 σ j的第q个训练值; Y σ j为对应特征的部分目标值;P为先验值; β为先验权重值。对于回归任务,计算先验值的方法是取数据集的平均值。
MOEAD算法是基于传统的聚合方法将一个多目标问题分解为多个单目标问题[19]。常用的3种聚合方法分别为加权求和法、切比雪夫方法和基于惩罚的边界交叉方法。令[w1w2,…,wN]为一组均匀分布的权重向量,z*是参考点,对于Pareto前沿的逼近问题能够通过切比雪夫法分解成N个标量优化子问题,其中,每个子问题的目标函数表示为:
g t x w j z * = m a x 1 i m w i j f i ( x ) - z *
w j = { w 1 j w 2 j w m j } T
式中 g t为切比雪夫聚合函数。
为实现大盾构的施工安全控制和多目标优化,提出一种结合CatBoost和MOEAD算法的混合智能方法。该方法的运行步骤大体如下:①根据工程实际确定相关的输入输出指标。②利用CatBoost算法建立输入参数和输出参数之间的非线性映射关系。③将建立的非线性映射关系作为MOEAD的适应度函数,采用MOEAD执行优化过程,获取满足实际要求的Pareto解集。④根据理想点法,从Pareto解集中选取现场决策方案。
以武汉市轨道交通某号线区间为例,分析所提出方案的有效性。该隧道区间设计为单洞双线隧道,采用直径12.56m大直径泥水盾构机掘进施工。区间设计全长为3 373.667 m,区间附属结构包括5座联络通道及2座废水泵房。以掘进段某区间为研究对象。在所研究区段中,采用现场布置钻孔进行工程地质勘察。调查显示:该区段主要覆盖土层为杂填土、粉质黏土和粉细砂。各土体的性能指标源于地勘报告,详情见表1。研究段盾构隧道的覆盖土层厚度为17.61~18.60 m,正在开挖的隧道主要穿过粉质黏土层,粉细砂以及粉质黏土与粉细砂的交互层。
在实际工程中,由于大盾构的刀盘直径超过10m,刀盘对土层的扰动比小盾构更大。因此,刀盘扭矩和刀盘转速对地表沉降的影响不应忽视。推进速度越快,工作效率越高但耗能也越大。随着总推力的增加,大盾构施加在土体上的力增大,导致土体的变形和引起的地表沉降增大。在掘进过程中,合理的注浆压力可填充支撑间隙并减小周围土体的变形。泥水盾构主要通过气垫仓压力来调节开挖面稳定,从而对地层变形进行控制。除此之外,进浆压力也是影响开挖面稳定性的参数。在掘进过程中,控制气垫仓液位需要调整进浆与排浆流量。由于大盾构的刀盘直径大,在掘进时大盾构的仰俯角对土体变形的影响不应被忽略。贯入度和掘进比能分别是评价盾构施工效率和能耗的常用指标。为确保施工过程安全,高效且节能,有必要在调整施工参数的同时将地表沉降、贯入度与掘进比能的优化结合起来。
综上所述,选取15个输入参数:推进速度x1、刀盘转速x2、总推进力x3、刀盘扭矩x4、注浆压力-上x5、注浆压力-下x6、主进浆流量x7、主排浆流量x8、进浆压力x9、气垫仓压力x10、俯仰角x11、内摩擦角x12、黏聚力x13、压缩模量x14、隧道埋深x15。输出参数选择3个:地表沉降y1、贯入度y2和掘进比能y3。为防止个别参数因数据过大导致其他参数被淹没或不收敛,将盾构停机数据删除后运用箱型图法清洗数据,避免异常值影响模型的精度和后续分析。
通过现场实时记录和监控,得到602条施工数据及相关数据。考虑到所取区段主要穿越复合土层,因此,加权平均相关土体性能参数。盾构施工参数与相关参数详情见表2。其中,地表沉降数值的正负代表着沉降方向,以向下为负,向上为正。值得注意的是,从表2中地表沉降的范围可发现该数据集的最大沉降集中在10 mm附近,符合控制标准。但从安全角度出发,为确保该项目标段的沉降均匀,仍需控制地表沉降。文中掘进比能计算为[4]:
E s = 2 π n T t + F v t 0.25 π D 2 v
式中:Es 为单位时间内刀盘的掘进比能;nv分别为刀盘转速和掘进速度;t为单位时间;DTF则分别为刀盘直径、刀盘扭矩和总推进力。
CatBoost的算法性能受max_depth、l2_leaf_reg和learning_rate这3个超参数的影响较大,在进行预测前应调整相关参数[20]。经过重复训练,对max_depth、l2_leaf_reg和learning_rate的设定结果见表3。其他参数设置为默认值。
实施CatBoost算法需要2组数据,一组用于开发预测模型,另一组用于检验预测性能。为尽可能复现试验结果,采用随机生成的数字组合将所构建的数据集划分为训练数据集(80%)和测试数据集(20%)。在训练数据集上执行模型所获得的沉降预测可能会导致有偏差的评估,故采用k折交叉验证来检验模型的预测结果。k折交叉验证的一个关键参数为折数kk值过低无法解决欠拟合或过拟合的问题,k值过高会导致验证集中的数据量过少,导致评估结果不准确。因此,结合数据集的分布形式与先前的研究报道[21-24],在所构建的Python平台采用不同k值重复训练预测模型。当k=4时,在所用数据集中预测模型的训练效果最佳。
采用均方根误差(Root Mean Square Error,RMSE)和平均绝对误差(Mean Absolute Error,MAE)计算预测值与实际值的误差程度,使用决定系数R2衡量预测值和观测值之间的拟合程度[25]
预测模型中的训练集和验证集输出结果如图1所示,分散的点说明预测值和实测值之间的差异。训练集和验证集的3个评估分数(即RMSE、MAE和R2)也在图中标出。不难发现,在地表沉降的验证集中,预测模型取得了理想的预测结果,预测的R2值为0.917,RMSE和MAE分别为0.812和0.573。此外,预测模型在贯入度和掘进比能的验证集中也表现出较高的精度。在3个输出变量中,基于CatBoost算法建立的预测模型在训练集与预测集的性能相近,这表明预测模型展现出良好的泛化性能。预测模型对于地表沉降、贯入度和掘进比能的验证集精度R2分别为0.917、0.936和0.988,预测值和测量值之间仅存在很小的误差。因此,通过CatBoost算法开发相关的预测模型,建立起盾构参数与输出目标之间精准的回归关系,作为多目标优化的适应度函数。
特征重要性是衡量预测值对输入参数依赖性的重要指标,某个输入参数的特征重要性越高,该输入参数对预测值的影响越大。文中特征重要性采用基于预测值的变化进行计算,计算过程与结果在Python平台中进行。预测模型对于地表沉降、贯入度和掘进比能的特征重要性排序如图2所示。从图2中可以看出,对于 y 1预测结果影响最大的因素为x3。总推力越大,引起的地表沉降值也越高。对于 y 2,影响最大的2个因素分别为x1x2x3x6x11x10对大盾构的贯入度影响也较大。在y3的预测中,x3的影响最为明显。考虑到大盾构的刀盘直径大,其姿态的变化对于土层的扰动更大,在对地表沉降的优化中不应忽视姿态变化带来的影响。x10x11是控制泥水大盾构姿态的关键指标。
综上所述,x1x2x3x4x10x11这6个因素对于预测模型的3个输出变量存在较为明显的影响。因此,通过调整这些参数,优化模型的输出变量。
为减少调整多个施工参数所花费的时间和成本,基于输入参数重要性排序结果和影响分析,选择实践中可调整的关键掘进参数进行多目标优化,以控制地表沉降、贯入度和能耗。结合工程实际和重要性排序结果,调整x1x2x3x4x10x11这6个因素。
选择地表沉降、贯入度和掘进比能作为优化项目设计的决策目标。CatBoost算法建立的预测模型用于预测和拟合施工参数与3个输出变量之间的关系,得到CatBoost回归函数,即 R ( x i )。将回归函数作为MOEAD优化的适应度函数。基于回归函数的地表沉降、贯入度和掘进比能的目标函数集获得:
m i n f 1 = m i n ( R ( x i ) ) m a x f 2 = m a x ( R ( x i ) ) m i n f 3 = m i n ( R ( x i ) )
在参数优化设计中,为使生成的盾构参数组合具备合理性与可行性,需要根据工程实际情况和相关规范设置每个决策变量的极限范围。由于对运行参数的取值没有明确要求,因此,根据工程实践和各种盾构模型中使用的合理参数范围,设置初始决策变量的范围。表2中,原始监测数据均在设定的初始约束范围内。设定的初始参数范围见表4
以地表沉降、贯入度和掘进比能绝对值最小化为目标,采用MOEAD算法进行全局寻优,确定盾构施工参数的最优解。在多目标优化之前,需要确定MOEAD算法参数的取值。MOEAD算法的目标数量设置为3,种群大小设置为1000,最大进化代数和停止代数为60。参数设置后,运行MOEAD算法得到Pareto前沿解集和理想点,如图3所示,所有Pareto前沿解集的优化幅度汇总见表5表6
MOEAD算法得到的Pareto最优解是一组满足多目标优化要求的解,但实际隧道施工中通常只需要一个决策方案。因此,采用理想点法从Pareto解集中选择MOEAD算法的最优解。理想点与Pareto前沿上的所有解之间的距离和理想点位置计算公式为:
D i = x i - x E x E 2 + y i - y E y E 2 + z i - z E z E 2
D E = m i n ( D i )
式中: D i为所有点的平均值与理想点之间的距离; ( x i y i z i )为最优Pareto边界点的坐标; ( x E y E z E )为理想点的坐标; D E为理想点。
为达到最佳的优化效果,采用理想点法从多个Pareto解集中选择最优解。在调整6个施工参数的情况下,地表沉降、贯入度和掘进比能均能得到很好的优化和控制。与原始数据样本的平均值相比,优化后的地表沉降、贯入度和掘进比能的平均改进率分别为12.35%、7.47%和10.71%。理想点的地表沉降、贯入度和掘进比能与原始数据平均值相比分别改进17.90%、4.13%和11.08%。基于Catboost-MOEAD框架的解决方案可同时减少地表沉降和能耗,并提高贯入度。
但不可忽视的是,3个目标之间存在冲突,盾构施工作业参数与优化目标之间存在复杂的关系。从表5中可以发现,理想点取值的地表沉降优化率高于整体优化平均值,但理想点取值对于贯入度的优化率却比优化结果平均值更低。因此,3个目标之间存在冲突,很难同时实现多个目标的优化,在实际工程中,需要结合现场需求进行相应调整。
1) 基于CatBoost算法构建的预测模型在大直径泥水盾构中的预测性能良好,可准确预测地表沉降、贯入度和掘进比能等目标参数。地表沉降、贯入度和掘进比能这3个输出变量的R2值分别为0.917、0.936和0.988,预测精度较高。CatBoost算法在大盾构的相关预测研究中有较好的潜力。
2) 基于CatBoost算法构建的预测模型对大直径泥水盾构施工参数的重要性排序显示,地表沉降和掘进比能受总推进力的影响最为显著,贯入度受推进速度和刀盘转速的影响最为显著。在实际工程中需要重点关注这些参数的变化。
3) CatBoost-MOEAD混合算法可有效优化地表沉降、贯入度和掘进比能。与原始数据的平均值相比,同时调整6个施工参数的优化结果对地表沉降、贯入度和掘进比能的平均值优化幅度分别为12.35%、7.47%和10.70%。
4) 尽管CatBoost-MOEAD算法在所选研究区段取得了良好的预测结果和优化效果,但由于获取的地表沉降监测数据有限,难以对CatBoost-MOEAD算法在不同地质和施工条件下的优化效果作进一步考察。因此,在后续研究中,还需要更多地监测数据全面评估CatBoost-MOEAD算法的鲁棒性。
  • 国家自然科学基金资助(51378235)
  • 国家自然科学基金资助(71571078)
  • 国家自然科学基金资助(51308240)
  • 国家重点研发计划项目(2016YFC0800208)
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2024年第34卷第6期
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doi: 10.16265/j.cnki.issn1003-3033.2024.06.1734
  • 接收时间:2023-12-08
  • 首发时间:2025-07-09
  • 出版时间:2024-06-28
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  • 收稿日期:2023-12-08
  • 修回日期:2024-03-21
基金
国家自然科学基金资助(51378235)
国家自然科学基金资助(71571078)
国家自然科学基金资助(51308240)
国家重点研发计划项目(2016YFC0800208)
作者信息
    1 华中科技大学 土木与水利工程学院,湖北 武汉 430074
    2 香港理工大学 建筑与房地产学部,香港 999077

通讯作者:

**苏飞鸣(1997—),广西南宁人,男,博士研究生,研究方向为土木工程建造与管理。E-mail:
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2种不同金属材料的力学参数

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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
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红菇属 Russula 17 8.13
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