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随着我国髙等级公路建设的飞速发展,极大的促进了国民经济的增长,也给人民生产、生活带来很多方便,但高等级公路桥头跳车问题也日渐突出,直接影响了行车的舒适和安全性,如何彻底解决这一问题成为高速公路建设的重要施工控制环节。1.桥头跳车原因1.1路基沉陷不良地质是造成桥头跳车的主要原因。由于桥涵通常位于有沟壑的地方,地下水位高、地基承载力低,且台后填土高,在自重和车辆荷载作用下将产生较大沉降,造成后期与桥梁结构产生沉降差而导致桥
With the rapid development of China’s highway construction, it has greatly promoted the growth of the national economy and brought a lot of convenience to people’s production and living. However, the problem of high-grade highway bridge jumping has also become increasingly prominent, which has a direct impact on driving comfort And safety, how to completely solve this problem has become an important construction control link in highway construction. 1. Bridgehead jumping reasons 1.1 Subgrade subsidence is caused by poor quality of the main reason for the bridge jumping. Because the bridges and culverts are usually located in the gully area, the groundwater level is high, the foundation bearing capacity is low, and the backfill is filled with high soil. It will cause large settlement under the dead weight and the vehicle load, resulting in the late settlement of the bridge structure resulting in the bridge