U型桥台扩大基础裂缝产生的原因分析及防治措施

Cause Analysis and Prevention Measures of Enlarged Foundation Cracks of U-type Abutment

包头北部地区地质条件较好,砂砾层、岩石层较浅,是较好的持力层,U型桥台应用比较广泛,但U型桥台属于大体积混凝土,施工中容易产生温度裂缝,严重影响结构的整体性、稳定性、渗透性、耐久性。结合包头市二道沙河桥的工程实例,介绍U型桥台扩大基础裂缝产生的原因以及制定的防治措施。

In the northern area of Baotou, the geological condition is better, and the shallower gravel and rock layers are good bearing layers. The U-type abutment is widely applied, but it belongs to the big volume concrete. The temperature crack is easy caused in the construction, which will seriously influence the integrity, stabilization, permeability and durability of structure. According to the engineering case of Baotou Erdaosha River Bridge, the article introduces the causes of bid foundation cracks of U-type abutment and the prevention measures.