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A Formation Method for Floating Vessels in Tunnel Sections by Immersed Tube Method

A technology of tunnel pipe and immersed pipe method, which is applied in the direction of tugboats, etc., can solve the problems of blank construction methods, etc., and achieve the effect of increasing the window period and good control performance

Inactive Publication Date: 2017-09-12
ERCHU CO LTD OF CHINA RAILWAY TUNNEL GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the construction method of long-distance immersed tube method tunnel pipe joint floating transportation that needs to pass through the bridge navigation hole in a relatively large flow rate and narrow channel is still blank.

Method used

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  • A Formation Method for Floating Vessels in Tunnel Sections by Immersed Tube Method
  • A Formation Method for Floating Vessels in Tunnel Sections by Immersed Tube Method
  • A Formation Method for Floating Vessels in Tunnel Sections by Immersed Tube Method

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example

[0017] Example: For an immersed tube section with underwater dimensions of 115m long x 8.3m high x 30m wide, its longitudinal section area A=115x8.3=954.5㎡, cross-sectional area B=8.3x30=249㎡, in water density ρ=1t / m³, water velocity V=0.8m / s, width 70m in the floating channel towing, when the longitudinal section of the immersed tube joint faces the flow (the direction of water flow is perpendicular to the direction of towing), the approximate flow force F= ρV 2 A=611kN; when the cross-section of the immersed tube joint faces the flow (the flow direction is parallel to the dragging direction), the approximate flow force F=ρV 2 B=159kN; the width of the narrowest bridge navigation hole in the channel is 60m; the tugboats are 5 4000HP full-turn tugboats.

[0018] like figure 1 As shown, when the towing direction 3 of the immersed tube joint 2 is basically perpendicular to the water flow direction 4: one of the tugboats 1 is hoisted at the head of the immersed tube, and the bo...

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Abstract

A ship formation method for the floating transport of immersed tube joints in tunnels. The towing ships for the floating transport of immersed tube joints use full-turn tugboats. Some of the tugboats are towed by the side of the immersed tube joints, and the other part of the tugboats are at the head of the immersed tube joints. or the tail of the pipe; the propeller of the side towing tugboat must protrude from the end of the immersed pipe joint. The ship formation of the present invention can effectively resist relatively large water flow force when the cross-section of the pipe joint is facing the flow or the longitudinal section is facing the flow, and under the condition of relatively large flow velocity, it can ensure the safety and smooth progress of the floating operation of the immersed pipe joint, greatly The window period for floating transport of immersed tube joints has been increased; the total width of the towing formation is small, and can pass through narrow channels and bridge navigation holes; the control performance is good, and floating transport of immersed tube joints can be carried out in channels with small turning radius.

Description

technical field [0001] The invention relates to a ship formation method for floating transport of tunnel joints by the immersed tube method, and belongs to the field of floating transport of tunnel joints by the immersed tube method. Background technique [0002] The tunnel construction of immersed tube method includes the prefabrication of pipe joints, undocking, floating transportation, sinking and installation, and in-pipe construction. Circumstances affect. At present, the immersed tube method tunnels constructed in China have the following characteristics: most of them are located in coastal areas, and the obvious characteristics of the construction waters are diurnal and semi-diurnal tides, that is, there are flat tides with slow flow velocity, and the window period of hydrological conditions required for construction is Sufficient guarantee; most of the prefabricated dry docks of immersed tube tunnels adopt axial dry docks or axial side dry docks, and the floating di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B63B35/68
CPCB63B35/68
Inventor 李志军彭再勇崔玉国邢永辉吴祖樟陈旺郭小龙李国江刘敏高昆张毅刘春标赵勇汪现伟董军
Owner ERCHU CO LTD OF CHINA RAILWAY TUNNEL GRP
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