Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for large-section underground excavation underpass of existing subway station
The invention discloses a method for large-section underground excavation and underneath pass of an existing subway station, and relates to the technical field of subway design, and the method comprises the following steps: S1, unloading the soil covering load of a top plate of the existing station; s2, excavating and supporting small pilot tunnels below the middle columns of the existing station in the spaced blocks; s3, after supporting is completed, a temporary supporting system is constructed at the position of a base in the excavated small pilot tunnel, and the temporary supporting system is supported between the base of the small pilot tunnel and the top of the existing station; s4, excavating and supporting the remaining pilot tunnels in the spaced blocks; s5, constructing a secondary lining structure of spaced blocks; s6, the steps S2-S5 are repeated, the remaining blocks are excavated and supported, and lining structures of the remaining blocks are constructed; and S7, after the lining structure is completed, the temporary supporting system of the underground excavation section is dismantled, and top plate covering soil is recovered. According to the method, active deformation control measures are taken, and the deformation of the existing station is controlled at the mm level, so that the safe and normal operation of the existing station is ensured.
本发明公开了一种大断面暗挖下穿既有地铁车站的方法，涉及地铁设计技术领域，包括以下步骤：S1：卸载既有车站顶板覆土荷载；S2：开挖并支护间隔分块中既有车站中柱下方的小导洞；S3：支护完成后，在开挖的小导洞内基底处施做临时支撑体系，所述临时支撑体系支撑于所述小导洞基底和既有车站顶部之间；S4：开挖并支护间隔分块中剩余的导洞；S5：施做间隔分块的二衬结构；S6：重复步骤S2‑S5，开挖并支护剩余分块，并施做剩余分块的衬砌结构；S7：衬砌结构完成后，拆除暗挖断面的临时支撑体系并恢复顶板覆土。本发明采取主动的变形控制措施，将既有车站变形控制在mm级别，以确保既有车站的安全和正常运营。
Method for large-section underground excavation underpass of existing subway station
The invention discloses a method for large-section underground excavation and underneath pass of an existing subway station, and relates to the technical field of subway design, and the method comprises the following steps: S1, unloading the soil covering load of a top plate of the existing station; s2, excavating and supporting small pilot tunnels below the middle columns of the existing station in the spaced blocks; s3, after supporting is completed, a temporary supporting system is constructed at the position of a base in the excavated small pilot tunnel, and the temporary supporting system is supported between the base of the small pilot tunnel and the top of the existing station; s4, excavating and supporting the remaining pilot tunnels in the spaced blocks; s5, constructing a secondary lining structure of spaced blocks; s6, the steps S2-S5 are repeated, the remaining blocks are excavated and supported, and lining structures of the remaining blocks are constructed; and S7, after the lining structure is completed, the temporary supporting system of the underground excavation section is dismantled, and top plate covering soil is recovered. According to the method, active deformation control measures are taken, and the deformation of the existing station is controlled at the mm level, so that the safe and normal operation of the existing station is ensured.
本发明公开了一种大断面暗挖下穿既有地铁车站的方法，涉及地铁设计技术领域，包括以下步骤：S1：卸载既有车站顶板覆土荷载；S2：开挖并支护间隔分块中既有车站中柱下方的小导洞；S3：支护完成后，在开挖的小导洞内基底处施做临时支撑体系，所述临时支撑体系支撑于所述小导洞基底和既有车站顶部之间；S4：开挖并支护间隔分块中剩余的导洞；S5：施做间隔分块的二衬结构；S6：重复步骤S2‑S5，开挖并支护剩余分块，并施做剩余分块的衬砌结构；S7：衬砌结构完成后，拆除暗挖断面的临时支撑体系并恢复顶板覆土。本发明采取主动的变形控制措施，将既有车站变形控制在mm级别，以确保既有车站的安全和正常运营。
Method for large-section underground excavation underpass of existing subway station
一种大断面暗挖下穿既有地铁车站的方法
LIU QINGSONG (Autor:in) / CHEN WEITAO (Autor:in) / ZHOU JUN (Autor:in) / WEI JINGYU (Autor:in) / YONG LIANG STEVE TAN (Autor:in)
29.03.2024
Patent
Elektronische Ressource
Chinesisch
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