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A platform for research: civil engineering, architecture and urbanism
Foundation pit support structure resistant to frost heaving and construction method
The invention discloses an anti-frost heaving foundation pit enclosure structure and a construction method in the field of pile foundation enclosure devices, the anti-frost heaving foundation pit enclosure structure comprises a pre-stressed anchor rod driven into a foundation pit slope and a foundation pit soil layer, the anchor rod comprises a rod main body and a shell arranged on the periphery of the rod main body in a sleeving mode, and a baffle is rotatably connected to an opening in the top of the shell; an axial vertical spiral channel is arranged in the baffle, an extension spring is arranged in the shell, one end of the extension spring is fixedly connected with the bottom of the shell, and the other end of the extension spring penetrates through the spiral channel of the baffle, extends out of the shell, is connected with a threaded section and is sleeved with a positioning nut; the bottom of the rod body is connected with a plug, the rod body is connected with a grouting supporting rod, and the grouting supporting rod is communicated with a grouting cavity in the rod body. According to the anti-frost heaving foundation pit support structure and the construction method, the influence of frost heaving on the foundation pit support structure is relieved, the safety of the foundation pit is ensured, the bending or deformation of the anchor rod caused by extruding the grouting anchor rod during frost heaving is avoided, the subsequent grouting effect is effectively ensured, and the anti-frost heaving foundation pit support structure is suitable for being applied to pile foundation support construction.
本发明公开了桩基围护装置领域的一种抗冻胀的基坑围护结构及施工方法，包括打入基坑边坡及基坑土层内的预应力锚杆，锚杆包括杆主体以及套设在杆主体外周的壳体，在壳体顶部开口处可转动地连接有挡板，挡板内部设有轴向竖直的螺旋通道，壳体内部设有拉伸弹簧，拉伸弹簧的一端与壳体底部固定连接，另一端穿过挡板的螺旋通道后伸出壳体连接有螺纹段并套设有定位螺母；杆主体底部连接有插头，杆主体上连接有注浆支杆，注浆支杆与杆主体内的注浆腔相连通。通过本发明的抗冻胀基坑围护结构及施工方法，减缓冻胀对基坑支护结构的影响，保证基坑安全，避免发生冻胀时挤压注浆锚杆导致的锚杆弯曲或形变，有效保证后续注浆效果，适于在桩基围护施工中应用。
Foundation pit support structure resistant to frost heaving and construction method
The invention discloses an anti-frost heaving foundation pit enclosure structure and a construction method in the field of pile foundation enclosure devices, the anti-frost heaving foundation pit enclosure structure comprises a pre-stressed anchor rod driven into a foundation pit slope and a foundation pit soil layer, the anchor rod comprises a rod main body and a shell arranged on the periphery of the rod main body in a sleeving mode, and a baffle is rotatably connected to an opening in the top of the shell; an axial vertical spiral channel is arranged in the baffle, an extension spring is arranged in the shell, one end of the extension spring is fixedly connected with the bottom of the shell, and the other end of the extension spring penetrates through the spiral channel of the baffle, extends out of the shell, is connected with a threaded section and is sleeved with a positioning nut; the bottom of the rod body is connected with a plug, the rod body is connected with a grouting supporting rod, and the grouting supporting rod is communicated with a grouting cavity in the rod body. According to the anti-frost heaving foundation pit support structure and the construction method, the influence of frost heaving on the foundation pit support structure is relieved, the safety of the foundation pit is ensured, the bending or deformation of the anchor rod caused by extruding the grouting anchor rod during frost heaving is avoided, the subsequent grouting effect is effectively ensured, and the anti-frost heaving foundation pit support structure is suitable for being applied to pile foundation support construction.
本发明公开了桩基围护装置领域的一种抗冻胀的基坑围护结构及施工方法，包括打入基坑边坡及基坑土层内的预应力锚杆，锚杆包括杆主体以及套设在杆主体外周的壳体，在壳体顶部开口处可转动地连接有挡板，挡板内部设有轴向竖直的螺旋通道，壳体内部设有拉伸弹簧，拉伸弹簧的一端与壳体底部固定连接，另一端穿过挡板的螺旋通道后伸出壳体连接有螺纹段并套设有定位螺母；杆主体底部连接有插头，杆主体上连接有注浆支杆，注浆支杆与杆主体内的注浆腔相连通。通过本发明的抗冻胀基坑围护结构及施工方法，减缓冻胀对基坑支护结构的影响，保证基坑安全，避免发生冻胀时挤压注浆锚杆导致的锚杆弯曲或形变，有效保证后续注浆效果，适于在桩基围护施工中应用。
Foundation pit support structure resistant to frost heaving and construction method
一种抗冻胀的基坑围护结构及施工方法
LIU WEI (author) / CHEN YONGMING (author) / GUAN YIGUI (author) / CHEN YANG (author)
2024-08-02
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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