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A platform for research: civil engineering, architecture and urbanism
Subway foundation pit secant pile shear key construction method without feet-lock anchor cable and rotary excavating drill bit
The invention provides a metro foundation pit secant pile shear key construction method without a feet-lock anchor cable, which comprises the following steps of: S1, determining a pile position along a foundation pit sideline according to a drawing; s2, rotary digging and hole forming are carried out, and meat pile holes and shear key holes are formed; shear key holes are positioned at the bottoms of the reinforced pile holes; s3, a reinforcement cage is put in, concrete is poured, and reinforced piles and shear keys are formed; s4, holes are formed in the plain piles, the bottoms of the holes enter the bed rock surface by more than 1 m, then concrete is poured, the plain piles are formed, and the plain piles are engaged with the meat piles; s5, the steps S1 to S4 are repeated, and a closed foundation pit is formed; and S6, subway foundation pit construction is completed. According to the metro foundation pit secant pile shear key construction method without the feet-lock anchor cable and the rotary excavating drill bit, a feet-lock waist beam and the feet-lock anchor cable are omitted, external expansion of the foundation pit is not needed, earth and stone excavation is reduced, mass migration and modification of surface pipelines are avoided, the influence on the surrounding environment is reduced, land resources are intensified, and the construction efficiency is guaranteed.
本发明提供了一种无锁脚锚索的地铁基坑咬合桩剪力键施工方法，包括如下步骤：步骤S1、根据图纸，沿基坑边线确定桩位；步骤S2、旋挖成孔，形成荤桩孔和剪力键孔；剪力键孔位于荤桩孔底部；步骤S3、放入钢筋笼，并浇筑混凝土，形成荤桩和剪力键；步骤S4、素桩成孔，孔底进入基岩面超过1m，然后浇筑混凝土，形成素桩，素桩与荤桩咬合；步骤S5、重复步骤S1至S4，形成封闭的基坑；步骤S6、完成地铁基坑施工。本发明提供了一种无锁脚锚索的地铁基坑咬合桩剪力键施工方法及旋挖钻头，取消了锁脚腰梁和锁脚锚索，无需基坑外扩，减少了土石方开挖，避免了地表管线的大量迁改和减轻了对周边环境的影响，集约化土地资源，并且保证了施工效率。
Subway foundation pit secant pile shear key construction method without feet-lock anchor cable and rotary excavating drill bit
The invention provides a metro foundation pit secant pile shear key construction method without a feet-lock anchor cable, which comprises the following steps of: S1, determining a pile position along a foundation pit sideline according to a drawing; s2, rotary digging and hole forming are carried out, and meat pile holes and shear key holes are formed; shear key holes are positioned at the bottoms of the reinforced pile holes; s3, a reinforcement cage is put in, concrete is poured, and reinforced piles and shear keys are formed; s4, holes are formed in the plain piles, the bottoms of the holes enter the bed rock surface by more than 1 m, then concrete is poured, the plain piles are formed, and the plain piles are engaged with the meat piles; s5, the steps S1 to S4 are repeated, and a closed foundation pit is formed; and S6, subway foundation pit construction is completed. According to the metro foundation pit secant pile shear key construction method without the feet-lock anchor cable and the rotary excavating drill bit, a feet-lock waist beam and the feet-lock anchor cable are omitted, external expansion of the foundation pit is not needed, earth and stone excavation is reduced, mass migration and modification of surface pipelines are avoided, the influence on the surrounding environment is reduced, land resources are intensified, and the construction efficiency is guaranteed.
本发明提供了一种无锁脚锚索的地铁基坑咬合桩剪力键施工方法，包括如下步骤：步骤S1、根据图纸，沿基坑边线确定桩位；步骤S2、旋挖成孔，形成荤桩孔和剪力键孔；剪力键孔位于荤桩孔底部；步骤S3、放入钢筋笼，并浇筑混凝土，形成荤桩和剪力键；步骤S4、素桩成孔，孔底进入基岩面超过1m，然后浇筑混凝土，形成素桩，素桩与荤桩咬合；步骤S5、重复步骤S1至S4，形成封闭的基坑；步骤S6、完成地铁基坑施工。本发明提供了一种无锁脚锚索的地铁基坑咬合桩剪力键施工方法及旋挖钻头，取消了锁脚腰梁和锁脚锚索，无需基坑外扩，减少了土石方开挖，避免了地表管线的大量迁改和减轻了对周边环境的影响，集约化土地资源，并且保证了施工效率。
Subway foundation pit secant pile shear key construction method without feet-lock anchor cable and rotary excavating drill bit
无锁脚锚索的地铁基坑咬合桩剪力键施工方法及旋挖钻头
REN SHIFANG (author) / YUAN WANG (author) / WANG YANBIN (author) / ZHOU SHALI (author)
2024-12-10
Patent
Electronic Resource
Chinese
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