Effect of Froude similitude deviation on curved channel simulations: A case study in the Middle Yangtze River

Key Techniques for Construction of East Anchorage of the Lingdingyang Bridge on Shenzhen-Zhongshan Link

“…The field measured strength is more than 80 Mpa, which is a good bearing layer geology. Based on the above geology and the actual situation, the construction has the following difficulties: (1)Anchorage foundation construction area of weak strata thick, construction waters channel frequent, stormy waves, into an island difficult ; (2)Backfill sand layer and silt layer internal friction angle is small, its own bonding force is not enough, easy to collapse in the process of milling groove, groove risk ; (3)The strength of the bearing layer is high, and the trenching efficiency is slow. If the pressure footage is rushed, the accuracy of the trench wall will be reduced and even the weak stratum will be disturbed ; (4)The water system of anchorage foundation is rich, and the fissure water of moderately weathered granite at the bottom is also developed, so the quality requirements of diaphragm wall and joint are higher during excavation of foundation pit ; (5)Construction waters typhoon frequent, summer rain, how to improve the excavation efficiency, to complete the base before the typhoon period is very necessary ; (6)Diamond type anisotropic anchor body has large inclination angle, many sections and large volume, so it is difficult to design temporary structure and select formwork support form ; (7)…”

“…3 m. The 135 t crawler crane is used to hoist the surrounding trestle. The locking steel pipe pile has large diameter, large quantity and high difficulty in closure, and different construction MMPES-2023 Journal of Physics: Conference Series 2519 (2023) 012016sequences will lead to hydrodynamic changes in the sea area, resulting in serious local scour or siltation[3]. After the cofferdam scour model test, it is determined that the circular cofferdam is divided into 4 zones and 8 sections.…”