Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Underground water treatment method for water-enriched red sandstone stratum metro station foundation
The invention relates to an underground water treatment method for a water-enriched red sandstone stratum metro station foundation. The method comprises the following steps of constructing a retainingstructure in a station foundation pit of a red sandstone stratum; excavating the foundation pit layer by layer according to steps, and constructing a water-collecting well in case of water seepage ofthe red sandstone stratum of the foundation; with excavation of the foundation pit, in order to prevent underground water from flowing into the lower foundation pit, arranging an intercepting dam; when the foundation pit is excavated to 1 m on the upper part of a bottom plate of the foundation pit, reducing underground water at the bottom of the foundation pit and avoiding disturbance to the original stratum by means of a vacuum light well-point dewatering structure, and increasing the bearing capacity of the foundation of the station; excavating residual soil of the foundation pit, pouring athickened station foundation cushion, pouring a bottom plate of the station, reserving a dewatering hole in the bottom plate of the station, and abolishing the vacuum light well-point dewatering structure and sealing the bottom plate after a station structure is closed. The dewatering treatment method of a special design in steps and areas guarantees that the steps and areas in the foundation pitare in water-less states and the bearing capacity of the bottom of the station foundation can be guaranteed, and it can be ensured that later period operation of the metro station is safe.
本发明涉及富水红砂岩地层地铁车站基底地下水处理方法，于红砂岩地层的车站基坑内施作围护结构；分台阶逐层开挖基坑，遇见基底红砂岩层渗水时施作集水井；随着基坑的开挖，为防止地下水流入下层基坑，设置截水坝；基坑开挖至基坑底板上部1米时，利用真空轻型井点降水结构降低基坑底地下水及避免对原状地层的扰动，增加车站基底承载力；开挖基坑剩余土体，浇筑加厚的车站基底垫层，浇筑车站底板，车站底板预留降水孔，待车站结构封闭后废除真空轻型井点降水结构并进行底板封堵。本发明采用分台阶、分区域特殊设计的降水处理方法，保证基坑内各台阶区域处于无水状态，而且能够确保车站基坑底的承载力，能够保证对地铁车站后期运营安全。
Underground water treatment method for water-enriched red sandstone stratum metro station foundation
The invention relates to an underground water treatment method for a water-enriched red sandstone stratum metro station foundation. The method comprises the following steps of constructing a retainingstructure in a station foundation pit of a red sandstone stratum; excavating the foundation pit layer by layer according to steps, and constructing a water-collecting well in case of water seepage ofthe red sandstone stratum of the foundation; with excavation of the foundation pit, in order to prevent underground water from flowing into the lower foundation pit, arranging an intercepting dam; when the foundation pit is excavated to 1 m on the upper part of a bottom plate of the foundation pit, reducing underground water at the bottom of the foundation pit and avoiding disturbance to the original stratum by means of a vacuum light well-point dewatering structure, and increasing the bearing capacity of the foundation of the station; excavating residual soil of the foundation pit, pouring athickened station foundation cushion, pouring a bottom plate of the station, reserving a dewatering hole in the bottom plate of the station, and abolishing the vacuum light well-point dewatering structure and sealing the bottom plate after a station structure is closed. The dewatering treatment method of a special design in steps and areas guarantees that the steps and areas in the foundation pitare in water-less states and the bearing capacity of the bottom of the station foundation can be guaranteed, and it can be ensured that later period operation of the metro station is safe.
本发明涉及富水红砂岩地层地铁车站基底地下水处理方法，于红砂岩地层的车站基坑内施作围护结构；分台阶逐层开挖基坑，遇见基底红砂岩层渗水时施作集水井；随着基坑的开挖，为防止地下水流入下层基坑，设置截水坝；基坑开挖至基坑底板上部1米时，利用真空轻型井点降水结构降低基坑底地下水及避免对原状地层的扰动，增加车站基底承载力；开挖基坑剩余土体，浇筑加厚的车站基底垫层，浇筑车站底板，车站底板预留降水孔，待车站结构封闭后废除真空轻型井点降水结构并进行底板封堵。本发明采用分台阶、分区域特殊设计的降水处理方法，保证基坑内各台阶区域处于无水状态，而且能够确保车站基坑底的承载力，能够保证对地铁车站后期运营安全。
Underground water treatment method for water-enriched red sandstone stratum metro station foundation
富水红砂岩地层地铁车站基底地下水处理方法
XIANG LIANG (Autor:in) / WANG FEI (Autor:in) / JIN BAOCHENG (Autor:in) / XIANG YANG (Autor:in) / HUANG SHUANGLIN (Autor:in) / LIU CHENG (Autor:in) / YIN LONGJUAN (Autor:in) / HE GUANNAN (Autor:in) / ZHANG KEXUN (Autor:in) / LIU GUANGYU (Autor:in)
05.05.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
E02D
FOUNDATIONS
,
Gründungen
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