Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Urban overpass pile foundation underpinning pre-jacking construction method
An urban overpass pile foundation underpinning pre-jacking construction method relates to the field of underground engineering and comprises the following steps: S1, construction preparation and construction of fender posts, excavation of a foundation pit and erection of pre-jacking equipment which is used for jacking a beam body to an initial position when a pier settles; s2, an underpinning pile foundation and an underpinning bearing platform are constructed, and a jacking system is arranged between a new bearing platform and an old bearing platform and used for completing system conversion; s3, jacks are installed and jacked, temporary piers are arranged beside the piers needing to be pre-jacked, hydraulic jacks are installed on the tops of the piers, each jack is provided with a pressure sensor and a displacement sensor, and the jacks are driven by a hydraulic pump station; s4, pile cutting is conducted on the basis of the step S3, before old pile cutting, 1.2 times of the design load is applied to the new bearing platform, and after settlement is basically stable, an old pile foundation between the new bearing platform and the old bearing platform is cut off; and S5, the distance between the new bearing platform and the old bearing platform in the free state is jacked to be smaller than or equal to 1 mm on the basis of the step S4, the bearing reaction force is determined, and finally concrete is poured between the new bearing platform and the old bearing platform for fixation and sealing.
一种城市立交桥桩基托换预支顶施工方法，涉及地下工程领域，包括如下步骤：S1，施工准备及施工围护桩、开挖基坑、架设预支顶设备，预支顶设备用于桥墩出现沉降时将梁体顶起至初始位置；S2，施工托换桩基、托换承台，新老承台间设置顶升系统用于完成体系转换；S3，安装千斤顶及顶升，在需预支顶的各墩旁设置临时墩，墩顶安装液压千斤顶，所述千斤顶设置有压力传感器及位移传感器，所述千斤顶由液压泵站驱动；S4，在步骤S3的基础上进行截桩，旧桩截桩前，对新承台施加设计荷载的1.2倍，在沉降基本稳定后，截断新老承台间的旧桩基；S5，在步骤S4基础上顶升处于自由状态的新老承台间距≤1mm的距离，确定支反力，最后在新老承台间浇筑混凝土固封。
Urban overpass pile foundation underpinning pre-jacking construction method
An urban overpass pile foundation underpinning pre-jacking construction method relates to the field of underground engineering and comprises the following steps: S1, construction preparation and construction of fender posts, excavation of a foundation pit and erection of pre-jacking equipment which is used for jacking a beam body to an initial position when a pier settles; s2, an underpinning pile foundation and an underpinning bearing platform are constructed, and a jacking system is arranged between a new bearing platform and an old bearing platform and used for completing system conversion; s3, jacks are installed and jacked, temporary piers are arranged beside the piers needing to be pre-jacked, hydraulic jacks are installed on the tops of the piers, each jack is provided with a pressure sensor and a displacement sensor, and the jacks are driven by a hydraulic pump station; s4, pile cutting is conducted on the basis of the step S3, before old pile cutting, 1.2 times of the design load is applied to the new bearing platform, and after settlement is basically stable, an old pile foundation between the new bearing platform and the old bearing platform is cut off; and S5, the distance between the new bearing platform and the old bearing platform in the free state is jacked to be smaller than or equal to 1 mm on the basis of the step S4, the bearing reaction force is determined, and finally concrete is poured between the new bearing platform and the old bearing platform for fixation and sealing.
一种城市立交桥桩基托换预支顶施工方法，涉及地下工程领域，包括如下步骤：S1，施工准备及施工围护桩、开挖基坑、架设预支顶设备，预支顶设备用于桥墩出现沉降时将梁体顶起至初始位置；S2，施工托换桩基、托换承台，新老承台间设置顶升系统用于完成体系转换；S3，安装千斤顶及顶升，在需预支顶的各墩旁设置临时墩，墩顶安装液压千斤顶，所述千斤顶设置有压力传感器及位移传感器，所述千斤顶由液压泵站驱动；S4，在步骤S3的基础上进行截桩，旧桩截桩前，对新承台施加设计荷载的1.2倍，在沉降基本稳定后，截断新老承台间的旧桩基；S5，在步骤S4基础上顶升处于自由状态的新老承台间距≤1mm的距离，确定支反力，最后在新老承台间浇筑混凝土固封。
Urban overpass pile foundation underpinning pre-jacking construction method
一种城市立交桥桩基托换预支顶施工方法
DU LIANG (Autor:in) / SONG YAXIONG (Autor:in) / ZHANG JINGLEI (Autor:in) / SUN YIXIONG (Autor:in) / ZOU CHAO (Autor:in) / XU LIBIN (Autor:in) / DANG YANSHENG (Autor:in) / CHEN DEYONG (Autor:in) / FU FAN (Autor:in) / SHI MENG (Autor:in)
09.09.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
E02D
FOUNDATIONS
,
Gründungen
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