Construction site: 30#～29#～28# section
Project Overview: 28#～29# section mainly passes through strongly weathered muddy siltstone, moderately weathered marl, strongly weathered andesite, moderately weathered andesite, slightly weathered andesite; 29#～30# section mainly passes through strongly weathered muddy siltstone, moderately weathered muddy siltstone, slightly weathered muddy siltstone.
Equipment type: 1 set of CSTE6280H earth pressure balance (hydraulic main drive) machine, with excavation diameter of 6280mm, length of 85m, machine weight about 500t, installed power of 1654KW, the maximum thrust speed of 80mm/min.