| 摘要 |
<p>A two stage construction methodology and product of major highway drainage system (ie. Precast section of identical cross sections and cast-insitu side walls of variable height, connecting PVC pipes from highway kerb, highway kerb integrally cast with side walls of drainage, earth filling, removable footpath tiles at top level and removable top slab of concealed drainage and deletion of outer side walls of cast in situ portion if it is redundant and product made of novel box shaped RCC section or novel trapezoidal shaped RCC section with separated footpath at top.</p> |
