濒临敏感构筑物混合土地层结构场地基坑降水实践  

Practice of foundation pit dewatering in mixed soil layer site near sensitive structures Dewatering Practice of Foundation Pit in the site of Mixed Soil Layer Structure with Sensitive Structures on the Verge

作　　者：吕康亭 LV Kang-ting(Guangzhou Construction Co.,Ltd.,Guangzhou Guangdong 510040,China)

机构地区：[1]广州建筑股份有限公司,广东广州510040

出　　处：《西部探矿工程》2023年第2期184-187,192,共5页West-China Exploration Engineering

摘　　要：河流相形成的混合土地层结构具有各层段强度不均匀、透水层与不透水层混杂的特征,在基坑降水期间,常因降水引起的地面沉降在基坑周边敏感构筑物中产生安全事故。为了消除安全事故,以南方城市某地铁车站为例,提出了适合濒临敏感构筑物混合土地层结构场地基坑的降水试验目的、试验参数、试验步骤以及试验监测、监测数据分析等。上述降水实践不仅有利于基坑支护结构的施工,确保土方安全开挖,而且有利于对基坑场地周边敏感构筑物的保护。The mixed soil layer structure formed by river facies has the characteristics of uneven strength of each layer and mixed permeable layer and impermeable layer.During the dewatering of foundation pit,the ground settlement caused by dewatering often causes safety accidents in the sensitive structures around the foundation pit.In order to eliminate safety accidents,taking a subway station in a southern city as an example,the dewatering test purpose,test parameters,test steps,test monitoring,monitoring data analysis,etc.suitable for the foundation pit of the mixed soil layer structure site of the near sensitive structures are proposed.The above dewatering practice is not only conducive to the construction of foundation pit support structure,ensuring the safe excavation of earthwork,but also conducive to the protection of sensitive structures around the foundation pit site.

关 键 词：构筑物 降水试验 混合土 基坑 

分 类 号：TU753[建筑科学—建筑技术科学]