Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Large-section tunnel small-clear-distance over-crossing existing tunnel upheaval control structure and implementation method
The invention provides a large-section tunnel small-clear-distance over-crossing existing tunnel upheaval control structure and an implementation method, and belongs to the technical field of tunnels and underground engineering.The structure comprises a hole digging pile and a prestressed pipe jacking beam, the prestressed pipe jacking beam is arranged at the upper end of the hole digging pile and strides over an existing tunnel, and a metal threaded pipe is arranged in the pipe jacking beam; a prestressed steel strand is arranged in the metal threaded pipe, and cement paste is poured into the metal threaded pipe. The method comprises the steps of excavation of a working well, jacking of a jacking pipe, construction of a hole digging pile, cutting of the jacking pipe when the jacking pipe is encountered, arrangement of steel bars and I-shaped steel in the jacking pipe, connection of the jacking pipe and the hole digging pile, installation of a metal threaded pipe in the jacking pipe, pouring of concrete in the jacking pipe, installation of a steel strand in the metal threaded pipe, tensioning of the steel strand and pouring of cement paste in the metal threaded pipe. The upper tunnel and the lower tunnel are separated through the prestressed bench beam structure composed of the prestressed pipe jacking beams and the pile bodies, the influence of excavation unloading of the newly-built tunnel is borne, and existing tunnel rebound deformation caused by excavation of the newly-built tunnel is resisted.
本发明提供了一种大断面隧道小净距上跨既有隧道隆起控制结构及实施方法，属于隧道与地下工程技术领域，结构包括挖孔桩和预应力顶管梁，预应力顶管梁设置在挖孔桩上端，骑跨在既有隧道上方，顶管梁内部设置金属螺纹管，金属螺纹管内设置预应力钢绞线，金属螺纹管内灌注水泥浆。方法包括开挖工作井、顶进顶管、施工挖孔桩、遇到顶管时对顶管切割、设置顶管内钢筋和工字钢、连接顶管与挖孔桩、顶管内安装金属螺纹管、顶管内浇筑混凝土、金属螺纹管内安装钢绞线、张拉钢绞线、金属螺纹管内灌注水泥浆。本发明通过预应力顶管梁与桩体构成的预应力板凳梁结构将上下隧道隔离开，承担新建隧道开挖卸载的影响，抵抗新建隧道开挖引起的既有隧道回弹变形。
Large-section tunnel small-clear-distance over-crossing existing tunnel upheaval control structure and implementation method
The invention provides a large-section tunnel small-clear-distance over-crossing existing tunnel upheaval control structure and an implementation method, and belongs to the technical field of tunnels and underground engineering.The structure comprises a hole digging pile and a prestressed pipe jacking beam, the prestressed pipe jacking beam is arranged at the upper end of the hole digging pile and strides over an existing tunnel, and a metal threaded pipe is arranged in the pipe jacking beam; a prestressed steel strand is arranged in the metal threaded pipe, and cement paste is poured into the metal threaded pipe. The method comprises the steps of excavation of a working well, jacking of a jacking pipe, construction of a hole digging pile, cutting of the jacking pipe when the jacking pipe is encountered, arrangement of steel bars and I-shaped steel in the jacking pipe, connection of the jacking pipe and the hole digging pile, installation of a metal threaded pipe in the jacking pipe, pouring of concrete in the jacking pipe, installation of a steel strand in the metal threaded pipe, tensioning of the steel strand and pouring of cement paste in the metal threaded pipe. The upper tunnel and the lower tunnel are separated through the prestressed bench beam structure composed of the prestressed pipe jacking beams and the pile bodies, the influence of excavation unloading of the newly-built tunnel is borne, and existing tunnel rebound deformation caused by excavation of the newly-built tunnel is resisted.
本发明提供了一种大断面隧道小净距上跨既有隧道隆起控制结构及实施方法，属于隧道与地下工程技术领域，结构包括挖孔桩和预应力顶管梁，预应力顶管梁设置在挖孔桩上端，骑跨在既有隧道上方，顶管梁内部设置金属螺纹管，金属螺纹管内设置预应力钢绞线，金属螺纹管内灌注水泥浆。方法包括开挖工作井、顶进顶管、施工挖孔桩、遇到顶管时对顶管切割、设置顶管内钢筋和工字钢、连接顶管与挖孔桩、顶管内安装金属螺纹管、顶管内浇筑混凝土、金属螺纹管内安装钢绞线、张拉钢绞线、金属螺纹管内灌注水泥浆。本发明通过预应力顶管梁与桩体构成的预应力板凳梁结构将上下隧道隔离开，承担新建隧道开挖卸载的影响，抵抗新建隧道开挖引起的既有隧道回弹变形。
Large-section tunnel small-clear-distance over-crossing existing tunnel upheaval control structure and implementation method
大断面隧道小净距上跨既有隧道隆起控制结构及实施方法
CHEN YIMING (Autor:in) / YOU SHUANG (Autor:in) / WANG YITONG (Autor:in)
26.03.2024
Patent
Elektronische Ressource
Chinesisch
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