中东滨海地区深基坑防渗设计研究

Deep Foundation Seepage Control Design of Middle East Coastal Area

地下水是诱发基坑工程涉水失稳的重要影响因素。以中东地区一大型内挖式港口的降排水设计为依托,针对滨海地貌区砂层和石灰岩双层水文地质条件,提出了中东滨海地区大型基坑开挖的防渗、降水和排水工程联合设计方法。渗流数值模拟结果表明,防渗墙的存在可以有效降低海侧渗流量;陆侧防渗墙的截流效果与地下水的补给量密切相关。为类似工程设计提供参考。

Groundwater is an important factor that induce excavation wading instability. In this paper,basing on dewatering and drainage design of a large dug in the Middle East area,according to sand and limestone double hydrogeological conditions of the coastal landscape area,proposing the seepage,precipitation and drainage works jointly design methods for large- scale excavation in Middle East coastal area,it can provide reference for similar engineering design. Seepage simulation show that cutoff wall can effectively reduce the presence of sea- side seepage discharge; the effect of the closure for the cut- off wall is closely related to the landside groundwater recharge.