Construction process of flexible shockproof joint for deposited pipe tunnel
A technology of immersed tube tunnel and construction method, which is applied in the field of construction engineering, and can solve the problems of inability to bear the tension of water-stop pads of pipe joints, very high precision requirements for hydraulic crimping of joints, and inconvenient installation.
Inactive Publication Date: 2005-12-28
SHANGHAI TUNNEL ENGINEERING CO. LTD.
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Problems solved by technology
However, since the "Ω"-shaped steel plate and "M"-shaped steel plate in the joint are formed by buckling of the steel plate, they are not completely flexible when placed in the joint; although the joint cable can overcome the shortcomings of the "Ω"-shaped or "M"-shaped steel plate , but due to the characteristics of its structural design, the hydraulic crimping accuracy of the joint is very high, so the installation is not very convenient
At the same time, neither of these two forms of longitudinal limiting members can bear the tension of the pipe joint water-stop pad during the construction of the final joint of the pipe section.
Method used
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Embodiment Construction
[0027] Provide following construction example in conjunction with content of the present invention:
[0028] The immersed tube section in the middle of the river of an immersed tube tunnel project is 395m long and consists of four sections, one of which is 95m long and the other three sections are all 100m long. The four pipe sections are lowered on the pile foundation from the north bank of the river to the south bank of the river in turn. Among them, the E1 pipe section is lowered first and connected with the connecting well in the north of the river, then the E2 and E3 pipe sections located in the middle of the river are lowered and connected, and finally the south bank dock is lowered. E4 pipe section at the mouth. After the sinking of the pipe section is completed, the mouth of the dry dock is closed by means of cofferdam sealing, and then the water in the dock is discharged into the river. Finally, the final joint is completed under dry construction conditions, that is, ...
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A construction method for a flexible anti-seismic joint of an immersed tube tunnel belongs to the field of construction engineering. According to the calculation results of pipe section settlement and longitudinal deformation, the technical measures taken to determine the form of pipe section joints are as follows: ① calculate the longitudinal settlement of the immersed tunnel according to the foundation bed condition; ② calculate the longitudinal temperature stress or Deformation; ③Determine the form of pipe joints; the technical measures taken for the seismic analysis of pipe joints according to the form of pipe joints are as follows: ①Simplify the dynamic analysis calculation model according to the interaction relationship between the soil around the immersed pipe and the pipe; Input seismic action; ③Application of dynamic analysis method for seismic analysis of pipe sections. The invention has substantive features and significant progress, simple structure, feasible and convenient on-site installation; the steel cable is more flexible in structure; avoids joint leakage; ensures anti-corrosion of the cable; makes the joint still watertight and shock-resistant in case of fire and other functions.
Description
technical field [0001] The invention relates to a construction method for an immersed tube tunnel, in particular to a construction method for a flexible anti-seismic joint of an immersed tube tunnel, belonging to the field of construction engineering. Background technique [0002] The pipe joints of immersed tunnels are an important part of immersed pipe engineering. Its joints should have the following functions and requirements: first, the requirements for water tightness, that is, no leakage during the construction phase and future operation phase; second, the joints have the following functions and requirements: The ability to resist various actions, including various loads and forced deformations, such as earthquakes, temperature, and foundation deformation; the third is that the structure of the joint requires clear force, which is convenient for construction and guarantees construction quality. However, since the pipe joints that can meet the above functions and requi...
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IPC IPC(8): E02D29/07E02D29/16E02D31/08
Inventor 刘千伟陈鸿沈永东
Owner SHANGHAI TUNNEL ENGINEERING CO. LTD.