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Deep-water large-section open caisson foundation sinking implantation initial-stage deviation correction construction method
The invention relates to a deep-water large-section open caisson foundation sinking implantation initial-stage deviation correction construction method, and belongs to the technical field of bridge open caisson construction. The deviation correction construction method comprises the following steps of riprap protection, specifically, riprap filling gravel protection is performed in an upstream face riverbed area of an open caisson foundation, riverbed areas on two sides of the open caisson foundation, an upstream face of the open caisson foundation and well hole areas on two sides; water leveladjustment, specifically, a forward pumping and backward pressing method is adopted, pumping weight reduction is conducted on an upstream compartment of the open caisson foundation, and irrigation weight reduction is conducted on a downstream compartment of the open caisson foundation; and well bottom mud suction, specifically, mud is sucked at the bottom of a downstream well hole of the open caisson foundation by adopting an air suction dredger to reduce the elevation of the downstream riverbed of the open caisson foundation. By adopting riprap protection, scouring of water flow force to a riverbed at the bottom of the open caisson foundation can be relieved, meanwhile, an upstream well hole can be shoveled, and the upstream and downstream height difference of the open caisson foundationis reduced; and meanwhile, water level adjustment and well bottom mud suction are combined for deviation correction operation, so that the open caisson gradually recovers balance, and the deviation correction construction efficiency of sinking and implantation of the open caisson foundation is improved.
本申请涉及一种深水大截面沉井基础下沉着床初期纠斜施工方法，属于桥梁沉井施工技术领域，包括以下步骤：抛石防护，在沉井基础的迎水面河床区域、沉井基础的两侧河床区域和沉井基础迎水面和两侧的井孔区域内抛填碎石防护；水位调整，采用前抽后压法，对沉井基础的上游隔舱进行抽水减重，对沉井基础的下游隔舱进行灌水压重；井底吸泥，在沉井基础下游井孔的井底采用空气吸泥机进行吸泥，降低沉井基础下游河床高程。本申请采用抛石防护不仅能够减轻水流力对沉井基础底部河床的冲刷，同时能够对上游井孔进行抄垫，降低沉井基础上下游高差。同时结合水位调整和井底吸泥进行纠斜作业，使沉井逐渐恢复平衡，提高了沉井基础下沉着床的纠斜施工效率。
Deep-water large-section open caisson foundation sinking implantation initial-stage deviation correction construction method
The invention relates to a deep-water large-section open caisson foundation sinking implantation initial-stage deviation correction construction method, and belongs to the technical field of bridge open caisson construction. The deviation correction construction method comprises the following steps of riprap protection, specifically, riprap filling gravel protection is performed in an upstream face riverbed area of an open caisson foundation, riverbed areas on two sides of the open caisson foundation, an upstream face of the open caisson foundation and well hole areas on two sides; water leveladjustment, specifically, a forward pumping and backward pressing method is adopted, pumping weight reduction is conducted on an upstream compartment of the open caisson foundation, and irrigation weight reduction is conducted on a downstream compartment of the open caisson foundation; and well bottom mud suction, specifically, mud is sucked at the bottom of a downstream well hole of the open caisson foundation by adopting an air suction dredger to reduce the elevation of the downstream riverbed of the open caisson foundation. By adopting riprap protection, scouring of water flow force to a riverbed at the bottom of the open caisson foundation can be relieved, meanwhile, an upstream well hole can be shoveled, and the upstream and downstream height difference of the open caisson foundationis reduced; and meanwhile, water level adjustment and well bottom mud suction are combined for deviation correction operation, so that the open caisson gradually recovers balance, and the deviation correction construction efficiency of sinking and implantation of the open caisson foundation is improved.
本申请涉及一种深水大截面沉井基础下沉着床初期纠斜施工方法，属于桥梁沉井施工技术领域，包括以下步骤：抛石防护，在沉井基础的迎水面河床区域、沉井基础的两侧河床区域和沉井基础迎水面和两侧的井孔区域内抛填碎石防护；水位调整，采用前抽后压法，对沉井基础的上游隔舱进行抽水减重，对沉井基础的下游隔舱进行灌水压重；井底吸泥，在沉井基础下游井孔的井底采用空气吸泥机进行吸泥，降低沉井基础下游河床高程。本申请采用抛石防护不仅能够减轻水流力对沉井基础底部河床的冲刷，同时能够对上游井孔进行抄垫，降低沉井基础上下游高差。同时结合水位调整和井底吸泥进行纠斜作业，使沉井逐渐恢复平衡，提高了沉井基础下沉着床的纠斜施工效率。
Deep-water large-section open caisson foundation sinking implantation initial-stage deviation correction construction method
一种深水大截面沉井基础下沉着床初期纠斜施工方法
LI JUNTANG (author) / CHEN TAO (author) / ZHANG GENG (author) / LUO BING (author) / ZHA DAOHONG (author) / YAO SEN (author) / ZHANG WENBIN (author) / HU YONG (author) / MAO WEIQI (author) / PAN DONGFA (author)
2020-11-13
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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