二 | 该隧道地质复杂，预计明年贯通。项目建成后，罗源、可门港将接入国家铁路网，货运能力大幅提升，助力福州打造海铁联运枢纽。 MIAMI -- Tropical Storm Tammy formed Wednesday afternoon in the Atlantic Ocean, putting a group of islands on alert for its expected approach.The Miami-based National Hurricane Center said Tammy was centered at 5 p.m. EDT about 625 miles (1,005 kilometers) east of the Windward Islands. It was moving briskly to the west at 23 mph (37 kph) and expected to gradually strengthen in coming days.Tropical storm watches have been issued for Barbados, Dominica, and Martinique and Guadeloupe. Forecasters said tropical storm conditions were possible in the region starting within 48 hours and that further watches and warnings will likely be required Wednesday night or Thursday. Tammy is initially expected to spread heavy rains over the northern Windward and Leeward Islands through Friday and then across the U.S. and British Virgin Islands and Puerto Rico over the weekend, according to the hurricane center.The center's opening advisory on Tammy said total rainfall could measure between 3 and 6 inches (7-14 centimeters) with maximum amounts of 10 inches (25 centimeters) in some spots in the northern Windward Islands and Leeward Islands. Lesser rainfall amounts are expected in the British and U.S. Virgin Islands into eastern Puerto Rico, the hurricane center added.The prospect of heavy rains as Tammy nears those islands raises a threat of scattered flash flooding, urban flooding and isolated mudslides in higher terrain, according to meteorologists.。
掘进施工现场
东南网8月25日讯（福建日报记者 张颖 通讯员 王耀荣 文/图）日前，由中铁二十局承建的福州港口后方铁路控制性工程——大樟隧道掘进突破8000米大关。 大樟隧道是我省最长货运铁路单线隧道，全长约11.6公里，预计明年贯通。该隧道地质条件复杂，穿越5条断层、5条节理密集带、2条岩性接触带及1条侵入接触带，围岩破碎松散、自稳能力差，施工难度堪称在“嫩豆腐”里打洞。 面对复杂地质条件，建设者因地制宜施策。针对大帽山斜井强富水段涌水难题，项目配置6台大功率水泵全天候不间断抽排水。隧道进口浅埋段下穿G104国道与沈海高速公路，最小埋深仅8.1米，沉降控制要求高，技术团队采用机械开挖配合精准控制爆破，全程动态监测沉降数据，保障路面通行安全。隧道出口段紧邻大溪里水库二级水源保护区，项目通过多级沉淀池和一体化污水处理设备，实现泥浆资源化利用，严守生态保护红线。 作为福建省首条地方自建货运铁路，福州港口后方铁路建成后，将有效破解沿海铁路受“天窗期”制约的运输难题，使罗源、可门港接入国家铁路网，货运能力从500万吨提升至3000万吨，为福州开辟一条全天候海铁联运大通道，助力福州港打造国家综合运输体系重要枢纽。
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