Abutment layout: The common height of abutment is less than10m, and a few are as high as 20m. In general, the height of abutment is determined by the height of subgrade fill at the bridge head. On the premise of meeting the flood discharge or traffic requirements under the bridge in bridge opening, Gao Qiao platform and high embankment can be built at the bridge head, and the bridge length can be extended by replacing the high embankment with the approach bridge, which mainly depends on the topography, geology, earthwork allocation, rational land use and environmental beautification near the bridge site.
Classification:
1. Gravity abutment: There are many forms according to the difference of bridge span, abutment height and terrain conditions. Commonly used types are U-shaped abutment, embedded abutment, splayed abutment and straight abutment.
Step 2 bury