Break the "new record" and refresh the "progress bar". On October 10, the city's key project within the jurisdiction of Songshan Lake - the pipeline project of the raw water of the river reservoir network around the Songmushan Reservoir entered a phased link, and the shield water conveyance tunnel between the R1# working well and the R2# working well was successfully completed 145 days ahead of schedule, marking the phased victory of the construction of the project.
The raw water pipeline project of the Songmushan Reservoir section of the river and reservoir network is a key water supply guarantee project during the "14th Five-Year Plan" period of Dongguan City, and it is also an important part of the construction of Dongguan City's "dual water source" guarantee system and strategic reserve water source system. The starting point of the water transmission line of the project is located at the end of the raw water pipeline of the river-reservoir interconnection project in the southeast corner of Songmushan Reservoir in Songshan High-tech Zone, and the end point is at the head of the box culvert of Songmushan-Lianhuashan Emergency Project, and the water is distributed to the planned new Songshan Lake Water Plant halfway.
Songshan Lake Water Plant
On December 29, 2023, the "Songmushan No. 1" slurry balance shield machine completed the split launch, surrounded by the edge of the Songmushan Reservoir, and will successively pass through the raw water pipeline, the Songmushan Reservoir flood discharge channel, seven fault zones and a number of fish ponds, and finally arrive at the R2# working receiving shaft, successfully completing the "underground journey", with a total length of 1,955 meters.
In the face of complex and changeable geological conditions and construction challenges, in the process of tunneling, the construction unit China Hydropower 14th Bureau followed the construction principles of "pipe advancement, strict grouting, less disturbance, fast reinforcement, diligent measurement, and early closure", comprehensively used the automatic measurement system, collected and analyzed the attitude of the shield machine and other information through the sensors installed on the shield machine, automatically adjusted the tunneling attitude of the shield machine according to the preset program, monitored and corrected in real time, and formulated targeted risk pre-control measures.
At the same time, by inviting industry experts to conduct in-depth on-site investigation and guidance for 4 times, and continuously optimizing the construction plan, the project has overcome three major difficulties, such as "split launch of the shield machine", "the shield machine passing through 2 DN3200m raw water pipelines of the built river and reservoir interconnection project", and "the slurry shield crossing seven fault zones". In April this year, the project broke the highest monthly footage record of slurry shield machine of the same diameter in Guangdong Province with an excellent excavation of 373.83 meters, and successfully completed the established goal of 300 meters of monthly excavation for three consecutive months, laying a solid foundation for the realization of the comprehensive penetration of the tunnel between the R1# working well ~ R2# working well. It is reported that the project is expected to be completed in May 2026, and after completion, the main water diversion scope will cover 8 towns and districts, including Songshan Lake, Marina Bay, Dalingshan Town, Dalang Town, and Humen Town, with an annual water diversion of 535 million cubic meters, a net water supply of 487 million cubic meters, and more than 3.4 million people benefiting from the water diversion. After the implementation of the project, it is of great significance to realize the safety of urban water supply in Dongguan City and promote the sustainable development of regional economy and society, and has strong economic and social benefits.
Producer: Songshan Hurong Media Center Source: China Power Construction 14th Bureau Editor: Zhang Sha Reviewer: Guo Wenjun Chen Qiliang
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