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基于路面管控系统的桥面铺装质量控制措施

吴 钊1,管义能2,陈 刚1,刘喜惠3

(1.苏交科集团股份有限公司,江苏 南京 211112; 2.武汉青山长江大桥建设有限公司,湖北 武汉 430345; 3.中铁大桥局集团第五工程有限公司,江西 九江 332001)

摘 要:武汉青山长江公路大桥全长7.547 6 km,主桥为主跨938 m的双塔双索面全飘浮体系斜拉桥,主桥桥面铺装采用浇筑式沥青混合料GA-10+高弹改性沥青混合料SMA-13,引桥桥面铺装采用SBS改性沥青混合料AC-20C+SBS改性沥青混合料SMA-13。为保证大桥桥面沥青混合料铺装质量,结合建设条件,采用路面管控系统(由拌合楼生产管理系统、摊铺管理系统、碾压管理系统组成)从混合料级配、温度、碾压方面进行桥面铺装质量控制。根据实时采集拌合楼生产数据、智能预警信息以调整混合料级配;通过采取调整拌合楼生产和出料温度、减少混合料温度散失等措施以控制混合料温度;结合施工部位及混合料形式,采取合适的碾压方案以保证碾压质量。该桥桥面铺装后,经检测沥青混合料质量满足规范要求。

关键词:斜拉桥;改性沥青;桥面铺装;路面管控系统;质量控制措施;温度控制;级配控制;碾压控制

中图分类号: U448.27;U443.33 文献标志码: A

Quality Control Measures for Bridge Deck Pavement Based on Deck Surface Management and Control System

WU Zhao1, GUAN Yi-neng2, CHEN Gang1, LIU Xi-hui3

(1. JSTI Group, Nanjing 211112, China; 2. Wuhan Qingshan Changjiang River Bridge Construction Co., Ltd., Wuhan 430345, China; 3. The Fifth Engineering Co., Ltd., China Railway Major Bridge Engineering Group, Jiujiang 332001, China)

Abstract: The Qingshan Changjiang River Highway Bridge in Wuhan has a total length of 7.547 6km, the main bridge of which is a two-pylon cable-stayed bridge of a full-floating system, with a main span of 938 m and stay cables fanned out in double cable planes. The deck pavement on the main bridge consists of gussasphalt mixture GA-10 and high-elastic modified asphalt mixture SMA-13, and the deck pavement of the approach bridge is formed of SBS modified asphalt mixture AC-20C and high-elastic modified asphalt mixture SMA-13. To ensure the paving quality of the asphalt mixture on deck surface, a deck surface management and control system was established to conduct deck pavement quality control from aspects of gradation of mixture, temperature and roller compaction, which incorporates the production management system in the batching plant, paving management system and the roller compaction management system. The production data from the batching plant were collected in real time and alarming signals were sent out intelligently to adjust the gradation of the mixture. The temperatures during the mixture production process and delivering process were adjusted, and the temperature loss of the mixture was kept decreasing, so as to control the temperature of the mixture. For different construction locations and types of mixtures, proper roller compaction solutions were selected to ensure the compacting quality. The inspections after the deck pavement construction demonstrate that the quality of the asphalt mixtures can meet the code requirements.

Key words: cable-stayed bridge; modified asphalt; deck pavement; deck surface management system; quality control measure; temperature control; gradation control; roller compaction control

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