Abstract: It is a tough work to excavate tunnels in poor geological zone, especially when the vertical shaft construction encounters massive dissolve filling materials. It’s necessary to take effective protection measures to ensure the construction security, quality and schedule. In the construction of the vertical shaft for maintenance sluice of the water intake, the Ganhe pumping station of the water diversion project from Niulanjiang River to Dianchi Lake, we firstly cleared the dissolve surface and sprayed concrete for sealing it, then constructed a platform and erected formwork for concrete grouting-filling and consolidation. According to the formation of the dissolution caves, we adopted combined measures of long anchor rod and anchor cable to reinforce the shaft wall. This paper presents the supporting measures for the vertical shaft in excavation process. The treatment measures were proved to be effect by practices.