为研究多孔波纹钢板拱涵在非对称回填施工中的力学行为，依托四川眉山某带加强圈多孔波纹钢板拱涵，考虑填土偏载和大型施工荷载的作用，参照规范，建立线性本构静力有限元模型。以最大等效应力和变形为控制指标，并与无加强圈拱涵对比，分析4种典型工况下波纹钢板的静力响应规律和结构安全性。同时，考虑到拱脚局部受力影响结构安全性，针对单侧回填至拱顶的最不利工况，进一步验算拱脚角钢、高强螺栓和地脚螺栓的承载能力。结果表明： 1）加强圈可改善波纹钢板拱涵的力学响应，对最大等效应力的减小程度为5%~8%，对最大变形的减小程度最高可达17.0%。2）单侧填筑至拱顶时，要保证0.5
m以上的最小拱顶覆土厚度； 大面积整体回填时，拱顶最小覆土厚度至少为1 m，均小于规范规定值。
To investigate the mechanical behaviors of multispan
corrugated steel plate arch culvert during asymmetric backfill construction, a
case study is conducted on a multispan corrugated
steel plate arch culvert with reinforcement concrete rib in Meishan, Sichuan
province, China, a linear constitutive static finite element model considering
the effect of partial load of filling soil and large construction load is
established according to the specifications. The maximum equivalent stress and
deformation are taken as the control indices, the static response law and
structural safety of corrugated steel plate under four typical working
conditions are analyzed by comparing with the arch culvert without
reinforcement concrete rib. At the same time, considering the structural safety
affected by local stress of the arch foot, the bearing capacity of the arch
foot angle steel, high strength bolts, and ground bolts is further checked in
view of the most unfavorable condition of unilateral backfill to the crown. The
results reveal the following: (1) The reinforcement concrete rib can improve
the mechanical response of corrugated steel arch culvert, the maximum
equivalent stress is reduced by 5 %~8 %, and the maximum deformation is reduced
by 17.0 %. (2) When unilateral filling to the crown, the minimum thickness of
soil covered on the crown above 0.5 m should be ensured; when a large area of
overall backfill is conducted, the minimum thickness of soil covered on the
crown is at least 1 m, which is less than the specified value in the
specifications.
