en.Wedoany.com Reported - On May 7, the Phase II expansion project of the new county sewage treatment plant in Wuxi County, Chongqing, constructed by China Bishuiyuan Company, completed the manual hole-digging pile construction for Section B, a critical task that had constrained the overall project. The 52 manually dug piles reached a cumulative total depth of 1,408.08 meters, with the deepest being 31.15 meters and the shallowest 16.08 meters. All were classified as exceptionally high-risk engineering works, involving the fully manual excavation of 6,082.9 cubic meters of earth and rock.

During construction, the project department managed the 52 manually dug piles in three staggered batches within a confined site of only 8.45 mu. Facing moderately weathered fractured rock strata, progress at most pile locations was limited to just one formwork depth every few days. On November 1, 2025, a sudden karst cavity hazard occurred at Pile #13 during excavation between depths of 11 and 12 meters. The project department immediately coordinated with survey, design, construction, and supervision teams for on-site assessment, promptly reported the situation, finalized a treatment plan, and completed reinforcement of the karst cavity area. The project team adhered to the principle of "immediate response, immediate reporting, immediate resolution" to ensure the construction process remained safe and controllable.

The Phase II expansion project of the new county sewage treatment plant in Wuxi County is designed with a capacity of 10,000 cubic meters per day. Once completed, it will resolve the issue of sewage overflow during the rainy season in Wuxi County and improve the water environment quality. The next phase of the project will involve parallel construction across multiple zones with various trades working simultaneously.

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