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A platform for research: civil engineering, architecture and urbanism
Large deformation treatment method for soft rock tunnel for pre-reinforcing advanced core surrounding rock
The invention provides a soft rock tunnel large deformation processing method for pre-reinforcing advanced core surrounding rock, which comprises three key steps of reasonably setting reserved deformation, pre-reinforcing the advanced core surrounding rock, and excavating and supporting in different areas, and through comprehensive means such as advanced detection, ground stress test, rock mechanical test and numerical calculation, the large deformation of a soft rock tunnel is obtained. The tunnel deformation degree and the actual excavation hole diameter are determined; the advanced core surrounding rock is reinforced in advance by forming high-pressure grouting holes; by means of multi-step excavation, coarse fiber concrete, I-shaped steel, connecting bars, concrete anchor rods and double-row foot-lock anchor pipe supporting and setting of multi-step safety step pitches, the excavation disturbance effect is reduced to the maximum extent, tunnel deformation is reduced, and it is ensured that a tunnel can pass through safely and smoothly.
本发明提供一种预加固超前核心围岩的软岩隧洞大变形处理方法，包括合理设置预留变形量、预加固超前核心围岩、分区开挖与支护三个关键步骤，通过超前探测、地应力测试、岩石力学试验、数值计算等综合手段，确定隧洞变形程度及实际开挖洞径；通过设置高压灌浆孔，预先加固超前核心围岩；通过多台阶开挖、粗纤混凝土、工字钢、联系筋、混凝土锚杆、双排锁脚锚管支护，设置多台阶安全步距，最大程度地减小开挖扰动效应，减小隧洞变形，确保隧洞安全、顺利通过。
Large deformation treatment method for soft rock tunnel for pre-reinforcing advanced core surrounding rock
The invention provides a soft rock tunnel large deformation processing method for pre-reinforcing advanced core surrounding rock, which comprises three key steps of reasonably setting reserved deformation, pre-reinforcing the advanced core surrounding rock, and excavating and supporting in different areas, and through comprehensive means such as advanced detection, ground stress test, rock mechanical test and numerical calculation, the large deformation of a soft rock tunnel is obtained. The tunnel deformation degree and the actual excavation hole diameter are determined; the advanced core surrounding rock is reinforced in advance by forming high-pressure grouting holes; by means of multi-step excavation, coarse fiber concrete, I-shaped steel, connecting bars, concrete anchor rods and double-row foot-lock anchor pipe supporting and setting of multi-step safety step pitches, the excavation disturbance effect is reduced to the maximum extent, tunnel deformation is reduced, and it is ensured that a tunnel can pass through safely and smoothly.
本发明提供一种预加固超前核心围岩的软岩隧洞大变形处理方法，包括合理设置预留变形量、预加固超前核心围岩、分区开挖与支护三个关键步骤，通过超前探测、地应力测试、岩石力学试验、数值计算等综合手段，确定隧洞变形程度及实际开挖洞径；通过设置高压灌浆孔，预先加固超前核心围岩；通过多台阶开挖、粗纤混凝土、工字钢、联系筋、混凝土锚杆、双排锁脚锚管支护，设置多台阶安全步距，最大程度地减小开挖扰动效应，减小隧洞变形，确保隧洞安全、顺利通过。
Large deformation treatment method for soft rock tunnel for pre-reinforcing advanced core surrounding rock
一种预加固超前核心围岩的软岩隧洞大变形处理方法
LIU NING (author) / GAO YAOHUI (author) / HAN YUE (author) / CHEN PINGZHI (author) / ZHANG XIAOYAN (author) / ZHOU YONG (author)
2024-02-20
Patent
Electronic Resource
Chinese
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