Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Micro-deformation control method for ultra-small clear distance over-crossing existing tunnel of large-section subway tunnel
The invention provides a micro-deformation control method for an ultra-small clear distance over-crossing existing tunnel of a large-section subway tunnel, and belongs to the technical field of tunnels and underground engineering. Comprising the steps that left and right upper pilot tunnels are constructed at the design position of a newly-built underground excavation tunnel, a pipe jacking working well is excavated, a jacking pipe is jacked in, manual hole digging piles are constructed downwards in the left and right upper pilot tunnels of the newly-built underground excavation tunnel, the jacking pipe is cut when encountering the jacking pipe, a reinforcement cage is installed, hole digging pile concrete is poured, and a jacking pipe inner cushion layer is poured. Mounting section steel in the jacking pipe and a beam stirrup; connecting the jacking pipe with a reinforcement cage; mounting an arc-shaped template which is the same as the superposed part of the primary support of the newly-built subsurface tunnel; pouring concrete in the jacking pipe; the upper tunnel and the lower tunnel are separated through the special-shaped bench beam structure formed by the special-shaped pipe jacking beams and the pile bodies, the influence caused by excavation and unloading of the newly-built tunnel is borne, and existing tunnel rebound deformation caused by excavation of the newly-built tunnel is effectively resisted.
本发明提供了一种大断面地铁隧道超小净距上跨既有隧道的微变形控制方法，属于隧道与地下工程技术领域，包括步骤有在新建暗挖隧道的设计位置施工左右侧上导洞、开挖顶管工作井、顶进顶管、在新建暗挖隧道左右两侧上导洞向下施工人工挖孔桩、遇到顶管时对顶管进行切割、安装钢筋笼、浇筑挖孔桩混凝土、浇筑顶管内垫层、顶管内型钢与梁箍筋安装、顶管与钢筋笼连接、安装与新建暗挖隧道初期支护重合部位相同的弧形模板，浇筑顶管内混凝土，开挖左侧下导洞和右侧下导洞，切割与初期支护重合部分顶管。本发明通过异形顶管梁与桩体构成的异形板凳梁结构将上下隧道隔离开，承担新建隧道开挖卸载产生影响，有效抵抗新建隧道开挖引起的既有隧道回弹变形。
Micro-deformation control method for ultra-small clear distance over-crossing existing tunnel of large-section subway tunnel
The invention provides a micro-deformation control method for an ultra-small clear distance over-crossing existing tunnel of a large-section subway tunnel, and belongs to the technical field of tunnels and underground engineering. Comprising the steps that left and right upper pilot tunnels are constructed at the design position of a newly-built underground excavation tunnel, a pipe jacking working well is excavated, a jacking pipe is jacked in, manual hole digging piles are constructed downwards in the left and right upper pilot tunnels of the newly-built underground excavation tunnel, the jacking pipe is cut when encountering the jacking pipe, a reinforcement cage is installed, hole digging pile concrete is poured, and a jacking pipe inner cushion layer is poured. Mounting section steel in the jacking pipe and a beam stirrup; connecting the jacking pipe with a reinforcement cage; mounting an arc-shaped template which is the same as the superposed part of the primary support of the newly-built subsurface tunnel; pouring concrete in the jacking pipe; the upper tunnel and the lower tunnel are separated through the special-shaped bench beam structure formed by the special-shaped pipe jacking beams and the pile bodies, the influence caused by excavation and unloading of the newly-built tunnel is borne, and existing tunnel rebound deformation caused by excavation of the newly-built tunnel is effectively resisted.
本发明提供了一种大断面地铁隧道超小净距上跨既有隧道的微变形控制方法，属于隧道与地下工程技术领域，包括步骤有在新建暗挖隧道的设计位置施工左右侧上导洞、开挖顶管工作井、顶进顶管、在新建暗挖隧道左右两侧上导洞向下施工人工挖孔桩、遇到顶管时对顶管进行切割、安装钢筋笼、浇筑挖孔桩混凝土、浇筑顶管内垫层、顶管内型钢与梁箍筋安装、顶管与钢筋笼连接、安装与新建暗挖隧道初期支护重合部位相同的弧形模板，浇筑顶管内混凝土，开挖左侧下导洞和右侧下导洞，切割与初期支护重合部分顶管。本发明通过异形顶管梁与桩体构成的异形板凳梁结构将上下隧道隔离开，承担新建隧道开挖卸载产生影响，有效抵抗新建隧道开挖引起的既有隧道回弹变形。
Micro-deformation control method for ultra-small clear distance over-crossing existing tunnel of large-section subway tunnel
大断面地铁隧道超小净距上跨既有隧道的微变形控制方法
WANG WEI (Autor:in) / HAN SHUANG (Autor:in) / CHEN YIMING (Autor:in) / JIA DINGDING (Autor:in) / YANG SHIWEI (Autor:in)
27.02.2024
Patent
Elektronische Ressource
Chinesisch
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