CAJ | 학술논문

为严格控制地表沉降，最大限度地减小隧道盾构施工给周围环境带来的不利影响，针对现有方法的不足，基于动态贝叶斯网络(DBN)理论提出一种盾构隧道施工参数优化方法，并将其应用于武汉某盾构隧道工程。首先选定待优化施工参数作为拟建网络结构的网络节点；然后设定离散化规则划分节点状态，以离散化工程实测数据完成参数学习，得到完整的DBN优化模型；该模型经验证用于工程施工参数优化，结果表明：该模型能够正确反映地表沉降与各施工参数之间的内在联系，具备一定的科学性；基于该模型进行反向诊断推理，能够确定各施工参数的最优设定区间；在该区间内对施工参数进行实时优化，能够降低地表沉降风险；该方法实时性强，具备一定的工程应用价值。
위엄격공제지표침강，최대한도지감소수도순구시공급주위배경대래적불리영향，침대현유방법적불족，기우동태패협사망락(DBN)이론제출일충순구수도시공삼수우화방법，병장기응용우무한모순구수도공정。수선선정대우화시공삼수작위의건망락결구적망락절점；연후설정리산화규칙화분절점상태，이리산화공정실측수거완성삼수학습，득도완정적DBN우화모형；해모형경험증용우공정시공삼수우화，결과표명：해모형능구정학반영지표침강여각시공삼수지간적내재련계，구비일정적과학성；기우해모형진행반향진단추리，능구학정각시공삼수적최우설정구간；재해구간내대시공삼수진행실시우화，능구강저지표침강풍험；해방법실시성강，구비일정적공정응용개치。
To control the surface subsidence and minimize the negative influence from shield tunneling to surrounding environment,a DBN-based,parameters optimization method in shield tunneling was proposed according to the deficiency of the existing method and was applied to a shield tunnel in Wuhan,China. Firstly the main construction parameters were selected to optimize as node variables and the network structure was built. Then discretizing rules were set to divide the nodes states and measured data were discredited for parameter learning to get the complete DBN optimization model. After model validation with engineering measured data applied this model to parameters optimization. The results show that this model can reflect the inner link between the surface subsidence and shield construction parameters. Based on this model the optimal setting-range of each construction parameters can be determined and within the range construction parameters can be adjusted and optimized real-timely,which is helpful to reduce surface subsidence;This method is valuable in practice.