Yangzhou Dilong YD1800 Rock Pipe Jacking Machine has been successfully applied to the Raw Water Supply Expansion Project in Tieshangang District, Beihai City, Guangxi Zhuang Autonomous Region, and completed on-site jacking operations. Featuring powerful hard rock tunnelling performance and stable and reliable overall performance, the machine effectively overcomes challenges arising from full-face hard rock construction, fulfils construction tasks with high standards, and provides solid equipment support for the steady advancement of the regional raw water supply infrastructure expansion project.
The Raw Water Supply Expansion Project in Tieshangang District, Beihai City, Guangxi, is a vital livelihood-supporting infrastructure project in the region. It plays a significant role in improving the regional water supply system, boosting raw water conveyance capacity and optimising the layout of water service facilities in the area. The tunnelling section consists of full-face rock strata with dense and hard rock mass. The uniaxial compressive strength of rock ranges from 70 MPa to 110 MPa, representing high-hardness rock working conditions. Tunnelling in hard rock strata brings substantial excavation resistance and great rock-breaking difficulties. Problems such as cutterhead abrasion, tunnelling stagnation and restricted construction progress tend to occur frequently. Extremely stringent requirements are imposed on the rock-breaking capacity, overall stability, cutter wear resistance and continuous jacking performance of pipe jacking equipment.
To tackle the construction difficulties brought by full-face high-hardness rock strata in this project, our YD1800 Rock Pipe Jacking Machine gives full play to its advantages as professional hard rock construction equipment. Specially optimised and upgraded for high-strength rock conditions, the machine is equipped with a high-strength dedicated rock cutterhead and wear-resistant cutters. It delivers powerful cutting and rock-breaking capacity, enabling efficient tunnelling in ultra-hard rock with compressive strength ranging from 70 MPa to 110 MPa. With a robust overall structure and strong power output, the machine can effectively eliminate various construction risks during hard rock jacking, maintain stable tunnelling attitude and controllable jacking accuracy, and fully satisfy the rigorous technical standards for full-face hard rock construction.
Throughout the construction process, the YD1800 Rock Pipe Jacking Machine exhibited outstanding adaptability and stable and reliable operation. Capable of coping with heavy resistance from high-hardness rock strata, it continuously and efficiently carried out rock breaking and jacking works. All construction activities proceeded in a standardised and orderly manner with qualified quality and guaranteed safety. The machine successfully solved the difficulties of full-face hard rock construction and completed the pipe jacking works of the water supply expansion project with high quality, fully demonstrating its core strength in hard rock tunnelling.
The successful completion of the water supply expansion project in Tieshangang District, Beihai, fully verifies the excellent construction capacity and stable adaptability of the YD1800 Rock Pipe Jacking Machine under full-face high-hardness rock conditions. It further enriches practical cases of the equipment in municipal water supply projects and high-strength hard rock pipe jacking, accumulates mature and reliable construction experience for similar domestic long-distance rock pipe jacking projects in high-hardness strata, and continuously promotes the high-quality upgrading of regional municipal water supply infrastructure.