The construction difficulties of connection galleries and waste water pump room are presented, with the construction of connection galleries of shieldbored tunnel on Yitian stationShixia station section of 3151 bid section of Shenzhen Metro as an example. Jet grouting reinforcement technology is replaced by fullface grouting reinforcement technology. The construction technology and technical key points of fullface grouting reinforcement technology are presented. The successful construction of connection galleries of shieldbored tunnel under bad geological conditions is guaranteed after construction program optimization.