The invention relates to a water-rich sand-
cobble stratum shield entry and exit reinforcing
system and a construction method thereof. A shield entry and a shield exit under the water-rich sand-
cobble stratum condition often generate the phenomena that door sealing is failed, a soil body loses stability and collapses, and an ambient environment is destroyed. According to the
system,
station pit support structures are arranged on the outer sides of the inner walls, at the shield entry end and the shield exit end, of a
station,
glass fiber rib support piles are arranged within the range of shield tunnel structures,
single row element secant piles are arranged outside the
glass fiber rib support piles, and the shield tunnel structures are arranged on the outer sides of the
single row element secant piles. According to the
system, the
glass fiber rib piles, the
single row element secant piles and a
dewatering well achieve the synergistic effect, the self-stability of a stratum and the integration of a shield and the soil body are fully utilized, therefore, implementation performance and safety of the shield tunnel entry and the shield tunnel exit are guaranteed, the construction risk is reduced, the method is easy to operate, investment is reduced, and construction implementation is promoted.