Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Design method of negative buoyancy immersed tube
The invention relates to the technical field of immersed tube tunnel construction, in particular to a design method of a negative buoyancy immersed tube. The method does not need to consider the design of a freeboard adjustment layer or consider the design contradiction between a freeboard value and floating resistance in an operation period, through the design thickness of ballast concrete determined by meeting the structural arrangement requirement, whether the preset first anti-floating coefficient is exceeded or not is inversely calculated, so that negative buoyancy larger than the corresponding preset requirement is obtained, then the design thickness of the first ballast concrete and the design thickness of the second ballast concrete are distributed according to the thickness calculated when the negative buoyancy is equal to the first anti-floating coefficient, it is effectively guaranteed that the immersed tube can meet the negative buoyancy requirement in the sinking and buttjoint stage specified by the existing specification, the negative buoyancy requirement after replacement of a ballast water tank is completed through butt joint specified by the existing specificationcan be met, meanwhile, the bearing capacity requirement of a transport ship is lowered, the lifting force needed in the immersed tube installation process can be reduced, the installation risk is reduced, and the transportation and installation cost is reduced.
本发明涉及沉管隧道施工技术领域，特别涉及一种负浮力沉管的设计方法，本方法无需考虑干舷调整层的设计，也无需考虑干舷值与运营期抗浮的设计矛盾，通过满足结构布置要求确定的压载混凝土的设计厚度，进而反算是否超出设定的第一抗浮系数的要求，以获得大于对应预设要求的负浮力，之后按照等于第一抗浮系数时计算出的厚度来分配第一压载混凝土的设计厚度和第二压载混凝土的设计厚度，有效保证沉管自身能够达到现有规范规定的沉放、对接阶段的负浮力要求，又能达到现有规范规定的对接完成置换压载水箱后的负浮力要求，同时，降低运输船的承载力要求，还能降低沉管安装过程所需的吊力，减小安装风险，降低运输、安装的成本。
Design method of negative buoyancy immersed tube
The invention relates to the technical field of immersed tube tunnel construction, in particular to a design method of a negative buoyancy immersed tube. The method does not need to consider the design of a freeboard adjustment layer or consider the design contradiction between a freeboard value and floating resistance in an operation period, through the design thickness of ballast concrete determined by meeting the structural arrangement requirement, whether the preset first anti-floating coefficient is exceeded or not is inversely calculated, so that negative buoyancy larger than the corresponding preset requirement is obtained, then the design thickness of the first ballast concrete and the design thickness of the second ballast concrete are distributed according to the thickness calculated when the negative buoyancy is equal to the first anti-floating coefficient, it is effectively guaranteed that the immersed tube can meet the negative buoyancy requirement in the sinking and buttjoint stage specified by the existing specification, the negative buoyancy requirement after replacement of a ballast water tank is completed through butt joint specified by the existing specificationcan be met, meanwhile, the bearing capacity requirement of a transport ship is lowered, the lifting force needed in the immersed tube installation process can be reduced, the installation risk is reduced, and the transportation and installation cost is reduced.
本发明涉及沉管隧道施工技术领域，特别涉及一种负浮力沉管的设计方法，本方法无需考虑干舷调整层的设计，也无需考虑干舷值与运营期抗浮的设计矛盾，通过满足结构布置要求确定的压载混凝土的设计厚度，进而反算是否超出设定的第一抗浮系数的要求，以获得大于对应预设要求的负浮力，之后按照等于第一抗浮系数时计算出的厚度来分配第一压载混凝土的设计厚度和第二压载混凝土的设计厚度，有效保证沉管自身能够达到现有规范规定的沉放、对接阶段的负浮力要求，又能达到现有规范规定的对接完成置换压载水箱后的负浮力要求，同时，降低运输船的承载力要求，还能降低沉管安装过程所需的吊力，减小安装风险，降低运输、安装的成本。
Design method of negative buoyancy immersed tube
一种负浮力沉管的设计方法
LIN WEI (Autor:in) / WANG YONG (Autor:in) / CHEN WEIBIN (Autor:in) / CHEN MENG (Autor:in) / LIANG BANGYAN (Autor:in) / WANG XIAODONG (Autor:in) / LI LIN (Autor:in) / JIANG ZHENGYAO (Autor:in)
22.01.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
E02D
FOUNDATIONS
,
Gründungen
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