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宁波市地处软土地区,其持力层的地基允许承载力仅60kN/m~2左右,因此在桥梁建设中,墩台多数采用钻孔灌注桩基础,其顶部与盖梁或与圬工墙相连接,竣工后桥梁运行正常,唯桥梁与道路相接处的路堤不时下沉,从而桥与路间形成错台,致使车辆行进中发生颠簸,既影响车辆行驶速度,又增大了车辆对桥台的冲击力。出现这种状况究其原因(如本文涉及的几项工程中,虽各自的路堤下的地基承载力未超过允许值):由于其下卧层按吴淞标
Ningbo City is located in the soft soil area. The allowable bearing capacity of its subsoil is only about 60kN / m ~ 2. Therefore, in the bridge construction, most of the abutments adopt the bored pile foundation, The bridge is connected to the wall, and the bridge works normally after completion. Only the embankment bridged by the bridge from time to time sinks, resulting in the formation of the wrong bridge between the bridge and the road. As a result, the vehicle bumps along the road, which affects not only the speed of the vehicle but also the vehicle Impact on the abutment. The reasons for this situation (such as several projects covered in this article, although the foundation under each embankment bearing capacity does not exceed the allowable value): Due to its substructure by Wusong standard