A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Protection construction method for subway excavated above existing subway interval
The invention belongs to the technical field of metro construction, and provides a metro protection construction method excavated above an existing metro interval, which mainly comprises the following steps: S1, arranging a foundation pit space to be excavated on the ground where a metro tunnel is buried, and carrying out mixing pile foundation construction between the top of the metro tunnel and the foundation pit space to be excavated to form a first mixing pile; s2, mixing pile foundation construction is conducted on the two sides of the subway tunnel, and second mixing piles are formed; s3, the first stirring piles and the second stirring piles are connected, the periphery of the subway tunnel is wrapped with the impermeable layer, and a protective shell is formed; s4, local reinforcement treatment is conducted on gaps between the subway tunnel and the mixing piles; s5, a water pressure adjusting device is arranged on the ground; s6, foundation pit excavation construction is conducted, meanwhile, the water pressure in the protective shell is adjusted through a water pressure adjusting device, the peripheral water pressure of foundation pit excavation construction conducted above a subway can be controlled, therefore, subway deformation is restrained, and the construction risk is reduced.
本发明属于地铁施工技术领域，提供一种既有地铁区间上方开挖的地铁保护工法，主要包括如下步骤：S1、在埋设有地铁隧道的地面处设置拟开挖基坑空间，在地铁隧道的顶部与拟开挖基坑空间之间进行搅拌桩基础施工，形成第一搅拌桩；S2、在所述地铁隧道两侧进行搅拌桩基础施工，形成第二搅拌桩；S3、将第一搅拌桩、第二搅拌桩相连接并与不透水层将地铁隧道的四周包裹并形成保护壳体；S4、在地铁隧道与搅拌桩之间的缝隙处做局部加固处理；S5、在地面处设置水压调节装置；S6、进行基坑开挖施工，同时通过水压调节装置调节保护壳体内的水压，本发明可以控制在地铁上方进行基坑开挖施工的周边水压，从而实现对地铁变形的抑制，降低施工风险。
Protection construction method for subway excavated above existing subway interval
The invention belongs to the technical field of metro construction, and provides a metro protection construction method excavated above an existing metro interval, which mainly comprises the following steps: S1, arranging a foundation pit space to be excavated on the ground where a metro tunnel is buried, and carrying out mixing pile foundation construction between the top of the metro tunnel and the foundation pit space to be excavated to form a first mixing pile; s2, mixing pile foundation construction is conducted on the two sides of the subway tunnel, and second mixing piles are formed; s3, the first stirring piles and the second stirring piles are connected, the periphery of the subway tunnel is wrapped with the impermeable layer, and a protective shell is formed; s4, local reinforcement treatment is conducted on gaps between the subway tunnel and the mixing piles; s5, a water pressure adjusting device is arranged on the ground; s6, foundation pit excavation construction is conducted, meanwhile, the water pressure in the protective shell is adjusted through a water pressure adjusting device, the peripheral water pressure of foundation pit excavation construction conducted above a subway can be controlled, therefore, subway deformation is restrained, and the construction risk is reduced.
本发明属于地铁施工技术领域，提供一种既有地铁区间上方开挖的地铁保护工法，主要包括如下步骤：S1、在埋设有地铁隧道的地面处设置拟开挖基坑空间，在地铁隧道的顶部与拟开挖基坑空间之间进行搅拌桩基础施工，形成第一搅拌桩；S2、在所述地铁隧道两侧进行搅拌桩基础施工，形成第二搅拌桩；S3、将第一搅拌桩、第二搅拌桩相连接并与不透水层将地铁隧道的四周包裹并形成保护壳体；S4、在地铁隧道与搅拌桩之间的缝隙处做局部加固处理；S5、在地面处设置水压调节装置；S6、进行基坑开挖施工，同时通过水压调节装置调节保护壳体内的水压，本发明可以控制在地铁上方进行基坑开挖施工的周边水压，从而实现对地铁变形的抑制，降低施工风险。
Protection construction method for subway excavated above existing subway interval
一种既有地铁区间上方开挖的地铁保护工法
WU YONGSHENG (author) / LI HONGBO (author) / NONG XINGZHONG (author) / ZHONG YANKAI (author) / LI HAO (author) / ZHANG CHANG (author) / LIU YINGSHAN (author) / CHEN YUQING (author)
2022-08-16
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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