施工条件下双级组合式绿色加筋格宾挡墙的工程特性研究

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中图分类号：U416.1 文献标志码：A 文章编号：1003-5168（2025）16-0064-06

DOI：10.19968/j.cnki.hnkj.1003-5168.2025.16.013

Study on Construction Mechanical Properties of Two-stage Combined Green ReinforcedGabion Retaining Wall

LONG Zuhui1GAO Wenhui²HE Bin'CHEN Feng1LI Zan' （1.Yueyang Planning，Survey and Design Institute Co.，Ltd.， Yueyang 414OO4， China; 2.School of Civil Engineering，Central South University， Changsha 41oO75，China）

Abstract： [Purposes] To elucidate the evolution of internal forces and overall stability of a two-stage composite green reinforced gabion retaining wall during construction，and to provide a theoretical basis forconstruction optimization and safety control of such eco-friendly retaining structures.[Methods] Based onan actual project，earth-pressure cels，flexible displacement meters，and total-station monitoring points were installed to continuously measure reinforcement tensile forces，horizontal earth pressures，and facing displacements throughout the construction sequence.Simultaneously，a 3D finitedifference model （FLAC 3D ）was established to simulate the staged construction process; the numerical results and field data were cross-validated.[Findings] Construction loads induced a cantilever-beam deformationof the facing： the crest and toe of the first stage exhibited the smallest displacements，whereas the maximum horizontal displacement occurred at mid-height （H/2）. Earth pressures in the second stage assumed a bulging distribution with the peak shifting outward; active unloading was achieved through outward bulging of the flexible facing.Tensile forces inall reinforcement layers first increased and then decreased along their length owing to the neting-bag effct，with the maximum located near the midlength toward the wallface.The discrepancy between simulated and measured values was less than 8% ， indicating excellent agreement.[Conclusions] The two-stage green reinforced gabion wall can adaptively dissipate construction loads through synergistic flexible deformation of the reinforcement and soil; overall stabilityis jointly ensured by thereinforcement neting-bag eect and the active unloading mechanism of the bulging facing.

Keywords： combined reinforced retaining wall; green reinforced gabion; field tests; numerical simulation; construction load

0 引言

在土中铺设适量的筋材后形成加筋结构，其可以在土体内部扩散应力，增加土体模量，传递拉应力，限制土体的侧向变形，从而不同程度地增强土的强度和变形特性，提高土体及有关结构物的稳定性[]。（剩余5146字）