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A platform for research: civil engineering, architecture and urbanism
Frozen soil road foundation precast pile construction and pile tip reinforcing device and method
The invention discloses a frozen soil road foundation precast pile construction and pile tip reinforcing device and method.The frozen soil road foundation precast pile construction and pile tip reinforcing device comprises a sleeve protection wall used for supporting a hole wall in the construction process and taking out the precast pile after the precast pile is stably placed; the precast pile is a PHC pipe pile, and after the sleeve protection wall is arranged in the drilled hole, the precast pile is arranged in the sleeve protection wall; the grouting head is used for being matched with grouting equipment, performing post-grouting to reinforce the pile body after pile sinking of the precast pile is completed, and forming a cementation body in a frozen soil bearing layer at the pile end; the pile cap is connected with the top of the precast pile to form a stress whole; and the sand cushion layer and the steel-plastic geogrid are laid on the ground surface and cover the pile cap, and the steel-plastic geogrid is embedded in the sand soil layer and used for reducing impact of a roadbed pressing construction worker on the pile structure, playing a role in drainage and heat insulation, dispersing upper loads and reducing differential settlement. Thermal disturbance caused by the construction process can be remarkably reduced, and the stability of the road foundation in the frozen soil area is improved.
本发明公开了一种冻土公路地基预制桩施工及桩端加固装置和方法，其包括：套筒护壁，用于在施工过程中支护孔壁，并在预制桩置入稳定后取出；预制桩，为PHC管桩，在所述套筒护壁置入钻孔后，预制桩置入所述套筒护壁内；注浆头，用于与注浆设备配合，在预制桩沉桩完毕后进行后注浆以加固桩体，并在桩端冻土持力层内形成胶结体；桩帽，与预制桩的顶部连接形成受力整体；砂垫层和钢塑土工格栅，铺设在地表并覆盖桩帽，且钢塑土工格栅嵌入在砂土层内，用于降低路基压实施工对桩结构的冲击，发挥排水隔热作用并分散上部荷载减小不均匀沉降。本发明能显著降低施工过程带来的热扰动，并提高冻土地区公路地基稳定性。
Frozen soil road foundation precast pile construction and pile tip reinforcing device and method
The invention discloses a frozen soil road foundation precast pile construction and pile tip reinforcing device and method.The frozen soil road foundation precast pile construction and pile tip reinforcing device comprises a sleeve protection wall used for supporting a hole wall in the construction process and taking out the precast pile after the precast pile is stably placed; the precast pile is a PHC pipe pile, and after the sleeve protection wall is arranged in the drilled hole, the precast pile is arranged in the sleeve protection wall; the grouting head is used for being matched with grouting equipment, performing post-grouting to reinforce the pile body after pile sinking of the precast pile is completed, and forming a cementation body in a frozen soil bearing layer at the pile end; the pile cap is connected with the top of the precast pile to form a stress whole; and the sand cushion layer and the steel-plastic geogrid are laid on the ground surface and cover the pile cap, and the steel-plastic geogrid is embedded in the sand soil layer and used for reducing impact of a roadbed pressing construction worker on the pile structure, playing a role in drainage and heat insulation, dispersing upper loads and reducing differential settlement. Thermal disturbance caused by the construction process can be remarkably reduced, and the stability of the road foundation in the frozen soil area is improved.
本发明公开了一种冻土公路地基预制桩施工及桩端加固装置和方法，其包括：套筒护壁，用于在施工过程中支护孔壁，并在预制桩置入稳定后取出；预制桩，为PHC管桩，在所述套筒护壁置入钻孔后，预制桩置入所述套筒护壁内；注浆头，用于与注浆设备配合，在预制桩沉桩完毕后进行后注浆以加固桩体，并在桩端冻土持力层内形成胶结体；桩帽，与预制桩的顶部连接形成受力整体；砂垫层和钢塑土工格栅，铺设在地表并覆盖桩帽，且钢塑土工格栅嵌入在砂土层内，用于降低路基压实施工对桩结构的冲击，发挥排水隔热作用并分散上部荷载减小不均匀沉降。本发明能显著降低施工过程带来的热扰动，并提高冻土地区公路地基稳定性。
Frozen soil road foundation precast pile construction and pile tip reinforcing device and method
一种冻土公路地基预制桩施工及桩端加固装置和方法
GAO FENG (author) / ZHANG JUNHUI (author) / ZENG XIANZHANG (author) / CHEN ZHIDE (author) / ZHENG JIANLONG (author)
2024-10-29
Patent
Electronic Resource
Chinese
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