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A platform for research: civil engineering, architecture and urbanism
Construction method for effectively controlling super sinking of open caisson
The invention discloses a construction method for effectively controlling super sinking of an open caisson, and belongs to the technical field of drainage engineering. The open caisson sinking control method comprises the following steps that S1, 40 cm broken stone hardcore is replaced and filled at the supporting leg position of an open caisson sinking control device so as to enhance the foundation bearing capacity at the supporting leg position; s2, a roadbed box is placed at the gravel replacement and filling position so as to guarantee the overall stability and bearing capacity of the supporting legs; s3, a chain is connected with a well wall pre-buried hanging ring, and soil digging sinking is conducted through a conventional sinking method; s4, when the open caisson is about to reach the designed sinking elevation, a chain fixing buckle is used for clamping a chain to control the well wall to sink, and then the open caisson continues to be subjected to soil digging and sinking till the designed elevation is reached; and S5, after the designed elevation is reached, grouting reinforcement treatment is conducted on the soil body at the blade foot, and after the strength is increased, the control device is removed to complete sinking of the open caisson. The method is easy and convenient to operate, the phenomena of super sinking and deflection of the open caisson can be greatly and effectively controlled, and the construction quality of the whole reinforced concrete pipe non-excavation pipe jacking is improved.
本发明公开了一种有效控制沉井超沉的施工方法，属于排水工程技术领域。本发明包括以下步骤：S1：对沉井下沉控制装置支腿位置进行换填40cm碎石垫层以增强支腿位置处的地基承载力；S2：在换填碎石处安放路基箱以保障支腿处的整体稳定性和承载力；S3：将链条与井壁预埋吊环相连接，再使用常规下沉方法进行掏土下沉；S4：待沉井即将达到下沉的设计标高时，使用链条固定卡扣卡住链条控制井壁下沉，然后继续掏土下沉直至设计标高；S5：达到设计标高后对刃脚处的土体进行注浆加固处理，待强度上来后撤除控制装置完成沉井下沉。本发明操作简便，能极大有效控制沉井出现超沉、歪斜现象，提高整体钢筋混凝土管非开挖顶管的施工质量。
Construction method for effectively controlling super sinking of open caisson
The invention discloses a construction method for effectively controlling super sinking of an open caisson, and belongs to the technical field of drainage engineering. The open caisson sinking control method comprises the following steps that S1, 40 cm broken stone hardcore is replaced and filled at the supporting leg position of an open caisson sinking control device so as to enhance the foundation bearing capacity at the supporting leg position; s2, a roadbed box is placed at the gravel replacement and filling position so as to guarantee the overall stability and bearing capacity of the supporting legs; s3, a chain is connected with a well wall pre-buried hanging ring, and soil digging sinking is conducted through a conventional sinking method; s4, when the open caisson is about to reach the designed sinking elevation, a chain fixing buckle is used for clamping a chain to control the well wall to sink, and then the open caisson continues to be subjected to soil digging and sinking till the designed elevation is reached; and S5, after the designed elevation is reached, grouting reinforcement treatment is conducted on the soil body at the blade foot, and after the strength is increased, the control device is removed to complete sinking of the open caisson. The method is easy and convenient to operate, the phenomena of super sinking and deflection of the open caisson can be greatly and effectively controlled, and the construction quality of the whole reinforced concrete pipe non-excavation pipe jacking is improved.
本发明公开了一种有效控制沉井超沉的施工方法，属于排水工程技术领域。本发明包括以下步骤：S1：对沉井下沉控制装置支腿位置进行换填40cm碎石垫层以增强支腿位置处的地基承载力；S2：在换填碎石处安放路基箱以保障支腿处的整体稳定性和承载力；S3：将链条与井壁预埋吊环相连接，再使用常规下沉方法进行掏土下沉；S4：待沉井即将达到下沉的设计标高时，使用链条固定卡扣卡住链条控制井壁下沉，然后继续掏土下沉直至设计标高；S5：达到设计标高后对刃脚处的土体进行注浆加固处理，待强度上来后撤除控制装置完成沉井下沉。本发明操作简便，能极大有效控制沉井出现超沉、歪斜现象，提高整体钢筋混凝土管非开挖顶管的施工质量。
Construction method for effectively controlling super sinking of open caisson
一种有效控制沉井超沉的施工方法
CHI LIANGFEI (author) / ZHAN CHANGQING (author) / TAN XIAODONG (author)
2023-12-29
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
Open caisson pressing sinking method construction method
| European Patent Office | 2020