井点降水在高水位砂壤土地层深基坑开挖中的应用  

Application of Well Point Precipitation in Deep Excavation of High Water Level Sandy Soil Soil Layers

作　　者：黎晓开 LI Xiaokai(POWERCHINA SINOHYDRO ENGINEERING BUREAU 14 CO.,LTD.,Kunming 650041,China)

机构地区：[1]中国水利水电第十四工程局有限公司,云南昆明650041

出　　处：《云南水力发电》2024年第9期75-77,92,共4页Yunnan Water Power

摘　　要：老赵牛河综合治理(引调水)工程位于山东省德州市齐河县,主要地质条件为砂土、砂壤土、黏土、粉细砂地层,因为齐河县距离黄河河床仅20 km,地下水位较高,结构物基础施工需进行深基坑开挖,最大开挖深度为8.55 m,在开挖过程中会遇到液化地层和流砂现象,降水施工是结构物基础深基坑开挖施工的关键。从经济、适用性等各方面综合比较,采用管井井点降水和轻型井点降水相结合能有效降低地下水位,防止深基坑开挖地层液化、流砂现象。Laozhaoniu River Comprehensive Management(Water Diversion)Project is located in Qihe County,Dezhou City,Shandong Province.The main geological conditions are sandy soil,sandy loam soil,clay,and fine sand formations.Due to the fact that Qihe County is only 20 km away from the Yellow River bed and has a high groundwater level,deep foundation pit excavation is required for the construction of structural foundations,with a maximum excavation depth of 8.55 m.During the excavation process,liquefaction and sand flow phenomena may be encountered,and dewatering construction is the key to the excavation of deep foundation pits for structural foundations.From various aspects such as economy and applicability,the combination of tube well point precipitation and light well point precipitation can effectively reduce the groundwater level and prevent liquefaction and sand flow phenomena in deep foundation pit excavation.

关 键 词：井点降水 高水位 砂壤土地层 应用 

分 类 号：TV551.412[水利工程—水利水电工程]