桥涵台背和挡土墙墙背填料，应优先选用内摩檫角值较大的砾（角砾）类土，砂

桥涵台背和挡土墙墙背填料，应优先选用内摩檫角值较大的砾（角砾）类土，砂类土填筑。

結果 (英文) 1:

Bridge abutment and retaining wall fillers should be preferred angle of internal friction values the larger gravel (breccia) soils, sandy soil reclamation.

結果 (英文) 2:

Retaining walls and bridge Abutment back packing, preference should be given within Friction angle value larger gravel (breccia) class soil, sandy soil to fill.

結果 (英文) 3:

Bridge abutment and retaining wall filler, internal friction angle should be preferred for larger values of gravel (Jiao Li) soil, sand soil filling.