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A platform for research: civil engineering, architecture and urbanism
Foundation pit supporting structure of rectangular vertical shaft above existing subway and construction method
The invention discloses a rectangular vertical shaft foundation pit supporting structure above an existing subway and a construction method. The construction method comprises the steps that S1, a site is leveled, and a compaction grouting body layer is constructed; s2, a cement stone powder slag stable layer is constructed, and a capping beam is laid; s3, an anti-overturning anchor rod and a sleeve valve pipe are constructed; s4, earthwork is excavated, and a well wall is installed; and S5, earthwork excavation is repeated, the well wall is installed to the pit bottom of the foundation pit, and sleeve valve pipe grouting reinforcement is conducted according to the development condition of gaps between the well wall and the soil body and between the outer pit wall of the well wall and the soil body. S6, laying a newly-built pipeline; and S7, backfilling stone powder slag into the foundation trench, wherein the construction is carried out after all pipelines are laid and low-grade concrete backfilling is comprehensively carried out. According to the construction method, the problems of the embedded length of the supporting structure of the pipeline foundation pit above the metro and floating of the metro are solved, the construction method is short in construction period and high in stability, and the engineering risk is greatly reduced.
本发明公开了一种既有地铁上方矩形竖井基坑支护结构及施工方法，包括S1、平整场地，压密注浆体层施工；S2、水泥石粉渣稳定层施工，铺设压顶梁；S3、抗倾覆锚杆、袖阀管施工；S4、开挖土方，安装井壁；S5、重复开挖土方、安装井壁至基坑的坑底，并根据井壁和井壁外坑壁和土体之间的缝隙发育情况进行袖阀管注浆补强。S6、新建管线敷设；S7、基槽回填石粉渣：在所有管线敷设完成并全面进行低标号混凝土回填后实施。采取若干个预制拼装式矩形竖井分段间隔施工，本发明解决了地铁上方管线基坑支护结构嵌入长度和地铁上浮问题，本发明的施工方法工期短，稳定性高，大大降低了工程风险。
Foundation pit supporting structure of rectangular vertical shaft above existing subway and construction method
The invention discloses a rectangular vertical shaft foundation pit supporting structure above an existing subway and a construction method. The construction method comprises the steps that S1, a site is leveled, and a compaction grouting body layer is constructed; s2, a cement stone powder slag stable layer is constructed, and a capping beam is laid; s3, an anti-overturning anchor rod and a sleeve valve pipe are constructed; s4, earthwork is excavated, and a well wall is installed; and S5, earthwork excavation is repeated, the well wall is installed to the pit bottom of the foundation pit, and sleeve valve pipe grouting reinforcement is conducted according to the development condition of gaps between the well wall and the soil body and between the outer pit wall of the well wall and the soil body. S6, laying a newly-built pipeline; and S7, backfilling stone powder slag into the foundation trench, wherein the construction is carried out after all pipelines are laid and low-grade concrete backfilling is comprehensively carried out. According to the construction method, the problems of the embedded length of the supporting structure of the pipeline foundation pit above the metro and floating of the metro are solved, the construction method is short in construction period and high in stability, and the engineering risk is greatly reduced.
本发明公开了一种既有地铁上方矩形竖井基坑支护结构及施工方法，包括S1、平整场地，压密注浆体层施工；S2、水泥石粉渣稳定层施工，铺设压顶梁；S3、抗倾覆锚杆、袖阀管施工；S4、开挖土方，安装井壁；S5、重复开挖土方、安装井壁至基坑的坑底，并根据井壁和井壁外坑壁和土体之间的缝隙发育情况进行袖阀管注浆补强。S6、新建管线敷设；S7、基槽回填石粉渣：在所有管线敷设完成并全面进行低标号混凝土回填后实施。采取若干个预制拼装式矩形竖井分段间隔施工，本发明解决了地铁上方管线基坑支护结构嵌入长度和地铁上浮问题，本发明的施工方法工期短，稳定性高，大大降低了工程风险。
Foundation pit supporting structure of rectangular vertical shaft above existing subway and construction method
既有地铁上方矩形竖井基坑支护结构及施工方法
SON HO-SUN (author) / WANG WEI (author) / YE WEIGUO (author) / SHI ZHONGRAN (author) / XIE JINSHENG (author) / WANG LIANFENG (author) / YUE PENG (author) / TIAN LEI (author) / CHEN QING (author) / ZENG WENFENG (author)
2024-01-09
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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