随着乡、镇、村工业的发展、中心村规模的扩大,乡村道路的交通运输量便不断增大。目前,全国村镇的主要乡村道路上都要求通汽车,随着一些跨河、沟的村镇桥梁的荷载标准要求的不断提高,在已建村镇桥梁中除专供人或手扶拖拉机行驶的生产桥外,一般都需要建通行汽车的桥梁,这些桥梁实际上与单车道的公路桥相似。 为配合乡镇村的规划与建设,笔者根据工作实践,介绍一种经济实用 With the development of the township, town and village industries, the size of the center village has been expanded, and the traffic volume of rural roads has been steadily increasing. At present, all major rural roads in villages and towns throughout the country are required to pass cars. As the load standards for bridges across villages and towns across the river and the ditch continue to increase, production bridges among existing bridges in villages and towns, except for those dedicated to tractors or manned tractors, In addition, generally require the construction of the car through the bridge, these bridges are actually similar to the one-lane highway bridge. To tie in with the planning and construction of township villages, the author based on work practices, introduced a kind of economical and practical