[Retracted] Research on Modular Management of Railway Bridge Technology Innovation in Complex and Difficult Mountainous Areas

Table 5

TI demands and obstacles of the LD Bridge and corresponding module design.

TI demands and obstacles	Specific analysis	Module design
Wind-resistant design	High average wind speed and large wind angle of attack	TI module of canyon wind resistance
Seismic design	Large seismic intensity near the fault	TI module of strong seismic resistance in the near field area
Environmental design	Located in a highland ecological reserve	TI module of environmental protection
Deep water construction	The Dadu river is over 10 meters deep and fast-flowing	TI module of deep water operation
Anchor construction	The main cable force of a single anchor of tunnel anchor is up to 4.6 tons	TI module of the construction of large tunnel anchors
Narrow construction site	Both banks of the mountain are exposed rock and steep	TI module of steep slope construction
	The site in the gorge is too narrow to lift stiffening beams from the valley floor	TI module of stiffened beam section lifting
Integration of construction and maintenance	Harsh environment and difficult post-operation and maintenance	TI module of structural durability
Difficulty in transporting materials	Weak infrastructure, large variety, and volume of material requirements	Modular management measures
Large project size	Thousand-meter railway suspension bridge with a large span
High level of risk management	Geological risk, construction safety risk, duration risk, environmental risk, and social risk