深基坑开挖施工岩体爆破及抽降基岩裂隙水对周边环境的影响

Impact of Rock Mass Blasting During Excavation of Deep Foundation Excavation and Pumping of Fissure Water in Bedrock on Surrounding Environment

在风化岩基岩地区深基坑开挖过程中,岩体爆破对周边环境的影响较严重,对支护体系的破坏易造成预应力锚索失效,基坑支护作用丧失。抽降基岩裂隙水对周边环境影响较小,这是本区风化岩具有的工程特性,是经过长期勘察技术工作的经验总结,对于相同岩土条件下的技术工作有指导意义。遵循边开挖、边支护的施工流程,能保证基坑支护施工的效果,能降低对周边环境的影响。

During the excavation of deep foundation pits in weathered rock bedrock areas,the impact of rock blasting on the surrounding environment is very serious,and the damage to the support system is more likely to cause the failure of prestressed anchor cables and the loss of foundation excavation support;Pumping down the cracked water of the bedrock has a small impact on the surrounding environment.Engineering characteristics of the weathered rock in this area that is a summary of the experience of long-term survey and technical work,which has guiding significance for the technical work under the same rock and soil conditions.Following the construction process of excavation and support can ensure the effect of foundation excavation support construction,which can reduce the impact on the surrounding environment.