公路下穿通道的封闭引道最大无缝长度研究

Study on Maximum Seamless Length of Closed Channels of Highway Underpass

以济南某公路立交下穿通道工程为例,运用高性能混凝土无缝设计理念来指导公路立交被交叉公路下穿通道的封闭引道设计。结果表明,不均匀沉降和车载的作用不会引起封闭引道的破坏,其破坏主要与温度应力有关。在地基不均匀沉降、车辆荷载和温度荷载共同作用下,墙体的最大无缝长度最短,其值为40. 6 m。

Taking the crossing underpass of highway in Jinan as an example,the concept of high performance concrete seamless design is used to guide the design of the closed channel of highway interchange under cross-highway crossing.The results show that the non-uniform settlement and vehicle-mounted action do not cause the damage of the closed channel and the damage is mainly related to the temperature stress.Under the joint action of uneven ground settlement,vehicle load and temperature load,the maximum seamless length of the wall is the shortest with value of 40.6 m.