[Haichuan Chemical News] Pouring of the raft foundation for the polypropylene extrusion and granulation building in Zhejiang Petrochemical’s Phase II project completed successfully
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On April 30, the pouring of the raft foundation for the polypropylene extrusion building in the second phase of Zhejiang Petrochemical was completed successfully, with China National Chemical Engineering 11th Construction Co., Ltd. (hereinafter referred to as CNCEC 11th) being the contractor for this project. After a fierce 38-hour effort, 4 pump trucks and 20 tank trucks were used to pour 7,700 cubic meters of concrete in succession, completing the pouring 12 hours ahead of schedule and setting a new record for the largest single-volume concrete pouring by this company in recent years. It is reported that the second phase of Zhejiang Petrochemical’s 2*450,000 tons per year polypropylene project represents the first time that the Xinjiang branch of 11th Construction Group has undertaken civil engineering and installation work in the southeast coastal area. To complete the task successfully, the branch dispatched its best employees and formed a management team with Xu Fangwei, the deputy manager of the branch, as the project manager. Since the project began, its project team has overcome unfavorable factors such as the rainy and humid climate in the area as well as poor geological conditions for construction. By working hard and racing against time, they achieved a remarkable transformation, shifting from an \"army-style\" approach to a \"navy-style\" one. The successful pouring of the raft foundation has provided this team with experience and boosted their confidence for subsequent construction work.
According to reports, the extruded granulated raft foundation is 69 meters long, 58.3 meters wide, and 2 meters high. It features 3 layers of reinforcement bars and more than 50 columns, with a total amount of reinforcement exceeding 1,000 tons; it is the largest of its kind in China and even in Asia. To ensure the successful pouring of large-scale concrete, the project team held multiple specialized meetings, developed various contingency plans, and made detailed arrangements for things such as vehicle routes and parking locations on site, emergency measures in case of bad weather or power outages, as well as material and logistical support. In particular, for the construction plan, experts from the supervision team, concrete mixing plant, the owner’s project team, the construction department, and the quality control department were invited to the site for inspections. Special meetings were held repeatedly to evaluate and optimize the plan on multiple occasions. To ensure the quality of the concrete, from the concrete mix design to the calculation of \"strain,\" the project team employed a range of measures: installing 44 thermometers in various locations of the foundation and covering them with multiple layers of felt for insulation, as well as using 2000 meters of U-shaped circulating water pipes for cooling. All these approaches were used to strive continuously for excellence in quality.
Pouring 7,700 cubic meters of concrete in a single 38-hour period has been recorded in the history of the 11th Construction Company, providing strong momentum for its branch offices that are undergoing significant reforms； For 38 hours, the project department leadership took charge of the duty shifts, with all departments working together to test the various management capabilities of the polypropylene project department since its inception. The storms continue, and the challenges remain. The project team states that going forward, all members of the team will keep their mission and responsibilities in mind, remain calm and focused, work harder still, and build on their successes. With double the confidence and double the effort, they will organize everything carefully, break down the construction plan into manageable tasks, and quickly launch a vigorous effort to complete the milestones set by the client. (Xu Qiang, Zhao Xiaobao)
Pouring 7,700 cubic meters of concrete in a single batch over 38 hours – the one-time pouring of large-volume concrete has always been a challenge
Zhejiang Petrochemical has reaped the benefits from Phase 1, and Phase 2 was launched swiftly, with everyone racing against time.
Time is money. Moreover, a large number of utility facilities need to be built in the first phase; only after the second phase is completed can benefits be generated