Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Complex geology land large-diameter open caisson whole process construction method
The invention provides a whole-process construction method for a large-diameter open caisson on the land with complex geology, and belongs to the field of open caisson construction methods. And the problem of road differential settlement caused by construction is solved. A foundation pit is excavated mechanically, coarse sand is laid at the bottom of the foundation pit, a concrete cushion layer is poured, an I-shaped steel bracket platform is pre-buried on the inner wall of a well, an open caisson inner wall support is erected on the I-shaped steel bracket platform, blade foot steel bars are machined in a steel bar machining field, the open caisson adopts the principle of sectional manufacturing and fractional sinking, and a manual air pick is adopted for chiseling away the cushion layer. The underground water level is observed in real time, non-drainage sinking is adopted in time, after blade feet completely enter the soil, a slurry pump is started, thixotropic slurry is injected while the open caisson sinks, underwater bottom sealing concrete is poured through a non-drainage vertical guide pipe method after the open caisson sinks stably, and finally bottom plate steel bar binding and concrete pouring work is conducted. The open caisson sinking analysis is carried out on the characteristics of all strata and the open caisson structure, and it is ensured that the open caisson sinking coefficient and the open caisson connecting height stability meet the requirements.
本发明提出了一种复杂地质陆上大直径沉井全过程施工工法，属于沉井施工工法领域。解决了施工带来的道路不均匀沉降问题。本发明基坑采用机械开挖，在基坑底铺设粗砂，浇筑混凝土垫层，井内壁预埋工字钢托架平台，沉井内壁支架搭设在工字钢托架平台上，刃脚钢筋在钢筋加工场加工，沉井采用分节制作、分次下沉原则，采用人工风镐进行垫层凿除，实时观测地下水水位，及时采取不排水下沉，刃脚完全入土后，开启泥浆泵，沉井边下沉边注入触变泥浆，沉井下沉稳定后，采用不排水垂直导管法灌注水下封底混凝土，最后，进行底板钢筋绑扎及混凝土浇筑工作。本发明通过对各地层特性及沉井结构进行沉井下沉分析，确保沉井下沉系数及沉井接高稳定性满足要求。
Complex geology land large-diameter open caisson whole process construction method
The invention provides a whole-process construction method for a large-diameter open caisson on the land with complex geology, and belongs to the field of open caisson construction methods. And the problem of road differential settlement caused by construction is solved. A foundation pit is excavated mechanically, coarse sand is laid at the bottom of the foundation pit, a concrete cushion layer is poured, an I-shaped steel bracket platform is pre-buried on the inner wall of a well, an open caisson inner wall support is erected on the I-shaped steel bracket platform, blade foot steel bars are machined in a steel bar machining field, the open caisson adopts the principle of sectional manufacturing and fractional sinking, and a manual air pick is adopted for chiseling away the cushion layer. The underground water level is observed in real time, non-drainage sinking is adopted in time, after blade feet completely enter the soil, a slurry pump is started, thixotropic slurry is injected while the open caisson sinks, underwater bottom sealing concrete is poured through a non-drainage vertical guide pipe method after the open caisson sinks stably, and finally bottom plate steel bar binding and concrete pouring work is conducted. The open caisson sinking analysis is carried out on the characteristics of all strata and the open caisson structure, and it is ensured that the open caisson sinking coefficient and the open caisson connecting height stability meet the requirements.
本发明提出了一种复杂地质陆上大直径沉井全过程施工工法，属于沉井施工工法领域。解决了施工带来的道路不均匀沉降问题。本发明基坑采用机械开挖，在基坑底铺设粗砂，浇筑混凝土垫层，井内壁预埋工字钢托架平台，沉井内壁支架搭设在工字钢托架平台上，刃脚钢筋在钢筋加工场加工，沉井采用分节制作、分次下沉原则，采用人工风镐进行垫层凿除，实时观测地下水水位，及时采取不排水下沉，刃脚完全入土后，开启泥浆泵，沉井边下沉边注入触变泥浆，沉井下沉稳定后，采用不排水垂直导管法灌注水下封底混凝土，最后，进行底板钢筋绑扎及混凝土浇筑工作。本发明通过对各地层特性及沉井结构进行沉井下沉分析，确保沉井下沉系数及沉井接高稳定性满足要求。
Complex geology land large-diameter open caisson whole process construction method
复杂地质陆上大直径沉井全过程施工工法
CHANG DONGHUI (Autor:in) / LIU QI (Autor:in) / WANG XIAOLONG (Autor:in) / LI JINZHOU (Autor:in) / ZHANG ZHIBIN (Autor:in) / BO HAO (Autor:in) / LIU JUAN (Autor:in) / CHANG MIN (Autor:in) / GUO SHUCHENG (Autor:in) / GOU JUAN (Autor:in)
31.05.2024
Patent
Elektronische Ressource
Chinesisch
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