桂林城区内漓江连续箱梁桥爆破拆除的环保对策

Environmental Protection Measures for Blasting Demolition of Continuous Box Girder Bridge at Lijiang River in Urban Area of Guilin

摘要:

随着经济和社会的发展，城市的基础设施大量处于拆旧建新之中，采用爆破方式拆除桥梁是一项重要的施工技术手段，其中多以爆破振动距离、爆破产物飞散距离作为设计的安全约束条件。然而，在风景城市的漓江航道上进行连续箱梁桥爆破拆除施工时，爆破产生的工程垃圾却会成为污染漓江水域环境的第一影响因素。因此，在爆破设计与施工过程中，考虑对漓江航道的环境保护而采取相应的上部结构隔断、桥墩预处理等爆破技术措施，有效降低了爆破工程垃圾对航道的环境污染影响。

Abstract:

With the development of the economy and society, much of the urban infrastructure is being demolished to build new ones. The use of blasting to demolish bridges is an important construction technique, in which the safety constraints in the design are often based on the blasting vibration distance and the scattering distance of blasting products. During the blasting demolition of a continuous box girder bridge on the waterway of Lijiang River in a scenic city, the engineering waste generated by the blasting would become the first factor of environmental pollution affecting the water area of Lijiang River. Therefore, in the blasting design and construction process, the blasting technical measures such as superstructure partition and pier pretreatment are taken to protect the environment of Lijiang River waterway so as to effectively reduce the environment pollution of the waterway caused by blasting engineering waste.