明挖隧道支护结构选型与参数优化研究

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中图分类号：TU398 文献标志码：A 文章编号：1005-8249（2026）02-0128-07

DOI：10.19860/j.cnki.issn1005-8249.2026.02.020

Research on Selection and Parameter Optimization of Support Structures for Cut and Cover Tunnels

WEN Yijia'，QIAO Huiting²，ZHANG Qiang³，GAN Bin （1. Shenzhen Power Supply Bureau Co.，Ltd.， Shenzhen 5180OO，China;

2. China Southern Power Grid Co.，Ltd.，Power Construction Quota Station，Guangzhou 51000O，China; 3.Shenzhen Power Supply Planning and Design Institute Co.， Ltd.， Shenzhen 518054，China）

Abstract：The selectionand parameter optimizationof support structures foropen cuttunnels often face the chalenge of multiobjectivecordinationbetween safety，economy，technology，andenvironment.Traditional decision-making methodsarenot suitable for complex engineering conditions with IV-V surrounding rock and burial depths of 8 -15 meters. Therefore，this articletakes aundergroundtransportationconnection tunel asthe background，constructsamulti-objectivedecision-making systemcovering the above four-dimensional objectives，and systematicallycompares the stressand deformationperformanceof three types of support schemes： soil nail wall + shotcrete，row pile + internal support， and underground continuous wall. The results showed thattheundergroundcontinuous wall schemehadthe bestcomprehensive performance，withastable stage arch crown stress of 6.2MPa ，arch waist convergence of 5.9mm ，and surface settlement of 8.3mm ，which were reduced by （204号 50.8% ， 68.4% ，and 65.8% respectively compared to the soil nail wall scheme；Further optimizing its parameters， increasing the wall thickness to 650mm and the concrete strength to C35， the arch crown settlement was 7.3 mm and the arch waist stress was 6.6MPa ，which decreased by 12.0% and 8.3% respectively compared to before optimization. This study formsaclosed-looptechnicalsystemof"selection monitoringoptimization"，providingreliablebasisforthedesignofsupport structuresforopencuttunnelsundercomplexgeologicalconditions，andpromotingthedevelopmentof engineringconstruction towards refinement and scientificity.

Key words：open -cut tunnel；support structureselection；multi-objective decision making；parameteroptimization; deformation control

0 引言

传统支护结构选型多依赖经验判断或单一目标决策，易出现安全冗余与成本浪费并存、技术适配性不足等问题，难以满足复杂地质条件与多元工程目标的协同要求[1-2]。（剩余8584字）