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8月20日航拍的保定市西大园110千伏变电站新建工程基坑气膜。 MANILA, Philippines -- A Chinese coast guard ship and one of its militia vessels separately bumped a Philippine coast guard ship and a military-run supply boat Sunday off a contested shoal, Philippine officials said, in a serious flareup that could heighten fears of an armed conflict in the disputed South China Sea.A top Philippine security official told The Associated Press there were no injuries among the Filipino crew members and an assessment of the damage to both vessels was underway. The official added that the incidents near the Second Thomas Shoal could have been worse if they were not able to maneuver rapidly away from the Chinese ships. The official spoke on condition of anonymity due to a lack of authority to publicly discuss details of the incidents.The United States, a longtime treaty ally of the Philippines, immediately condemned the actions by China's ships. The Philippine government also condemned the latest confrontations in “the strongest degree” and called them a violation of Manila’s sovereignty.The Chinese coast guard said the Philippine vessels “trespassed” into what it said were Chinese waters “without authorization” despite repeated radio warnings, prompting its ships to stop them. It blamed the Philippine vessels for causing the collisions."The Philippine side’s behavior seriously violates the international rules on avoiding collisions at sea and threatens the navigation safety of our vessels,” the Chinese coast guard said in a statement posted on its website.The U.S. Ambassador to Manila, MaryKay Carlson, said in a post on X, formerly known as Twitter, that “the United States condemns the PRC's latest disruption of a legal Philippine resupply mission to Ayungin shoal, putting the lives of Filipino service members at risk.”She used the initials for China's formal name, the People's Republic of China, and the name the Philippines uses for the Second Thomas Shoal. She added that Washington was standing with its allies to help protect Philippine sovereignty and to support a free and open Indo-Pacific region.A Philippine government task force dealing with the South China Sea disputes said the collisions occurred as two Philippine supply boats escorted by two Philippine coast guard ships were heading to deliver food and other supplies to the atoll in the face of a years-long Chinese blockade.The task force said it “condemns in the strongest degree the latest dangerous, irresponsible, and illegal actions of the Chinese coast guard and the Chinese maritime militia done this morning in violation of Philippine sovereignty, sovereign rights and jurisdiction."The actions by the Chinese ships were “in utter blatant disregard of the United Nations Charter, the United Nations Convention on the Law of the Sea” and international regulations that aim to prevent sea collisions, said the Philippine task force, which includes the country’s defense and foreign affairs departments, the military, national security council and the coast guard.Near-collisions have happened frequently as Philippine vessels regularly deliver supplies to Filipino marines and sailors stationed on the disputed shoal. But this was the first time Philippine officials have reported their country’s vessels being hit by China’s ships.In the first incident that happened Sunday morning, “dangerous blocking maneuvers of China coast guard vessel 5203 caused it to collide with the Armed Forces of the Philippines-contracted indigenous resupply boat Unaiza May 2,” the task force statement said. It said the “provocative, irresponsible, and illegal action” of the Chinese coast guard ship “imperiled the safety of the crew."The Chinese coast guard gave a different version and said the Philippine supply boat deliberately crossed the bow of its ship, which was on a routine law enforcement patrol, “resulting in a slight collision."Separately, Philippine coast guard ship BRP Cabra’s left side “was bumped by Chinese maritime militia vessel 00003 while it was lying to” northeast of the Second Thomas Shoal, the statement said.The Chinese coast guard said the Philippine ship “deliberately provoked trouble” by reversing its direction, causing its stern to collide with the Chinese vessel and “heating up the situation at the scene." In the past, Chinese officials have played down claims that the Chinese vessels were military militia ships meant to look like fishing boats.Despite the Chinese coast guard blockade, one of the two Philippine navy-manned boats managed to maneuver past the Chinese vessels and deliver supplies to the small contingent stationed on board a long-marooned but still actively commissioned warship, the BRP Sierra Madre, the task force said.It was the latest flare-up in long-simmering territorial disputes in the South China Sea, one of the world’s busiest trade routes. The conflicts, which involve China, the Philippines, Vietnam, Malaysia, Taiwan and Brunei, are regarded as a potential flashpoint and have become a delicate fault line in U.S.-China rivalry in the region.In early August, a Chinese coast guard ship used a water cannon against one of two Philippine supply boats to prevent it from approaching Second Thomas Shoal. The move, which was caught on video, outraged President Ferdinand Marcos Jr. and prompted the Department of Foreign Affairs in Manila to summon the Chinese ambassador to convey a strongly worded protest.Washington reacted by renewing a warning that it is obligated to defend the Philippines as a treaty ally.The Chinese Foreign Ministry accused Washington of “threatening China” by raising the possibility of activating the U.S.-Philippine mutual defense treaty. Beijing has repeatedly warned the U.S. not to meddle in regional territorial disputes.Later in August, the Philippines again deployed two boats that got past the Chinese coast guard blockade and delivered supplies to the Filipino forces at Second Thomas Shoal. Two Philippine coast guard ships escorting the supply boats, however, were prevented by Chinese coast guard ships from maneuvering closer to the shoal. A U.S. Navy surveillance aircraft flew in circles in support of the Philippine vessels as the standoff continued for more than three hours.A 2016 arbitration ruling set up under the 1982 U.N. Convention on the Law of the Sea invalidated Beijing’s claims on historical grounds to virtually the entire South China Sea. China refused to participate in the arbitration sought by the Philippines, rejected the decision and continues to defy it.___Associated Press journalist Huizhong Wu contributed to this report from Bangkok.。受访者供图8月21日，从保定火车站西广场向西望去，一座巨大的银白色“帐篷”格外醒目。这可不是什么场馆，而是保定市西大园110千伏变电站新建工程的施工现场。“这个‘帐篷’叫基坑气膜，采用充气密闭结构，能将整个作业面包裹得严严实实。”该项目负责人麻石磊说，保定市西大园110千伏变电站新建工程，是首个采用基坑气膜全封闭施工技术的电力项目。目前，该项目的土建施工已完成总工程量的70％，预计年底前建成。
二 | 把工地藏进“帐篷”里，是因为项目地处闹市区，居民小区、商业网点环绕四周，扬尘治理、噪声管控的标准高，加上施工时间仅3个多月，又赶上主汛期，遭遇强降雨会影响施工进度。经多方论证，项目方最终选择了基坑气膜全封闭施工方案，既能防尘降噪，又能在雨季不间断施工。“气膜总覆盖面积3638平方米，由两块模体拼接而成，重量超33吨，一旦被大风吹走，后果不敢想象。
三 | ”麻石磊说，传统气膜拼接普遍采用烫粘、魔术贴搭接工艺。为保障安全，他们采用栓接工艺，利用1100余颗螺栓将两块模体固定在一起，外面再加魔术贴进行二次密封。同时，在气膜外部安装包封阻拦索“兜”住膜体，使基坑气膜能抵御12级强风。
四 | 防尘降噪的效果怎么样？记者站在距基坑气膜几十米的空地上，看不到施工扬尘逸散，也听不到设备轰鸣。“大型机械作业的轰鸣声被‘捂’在气膜内。
五 | ”麻石磊说，监测数据显示，这项技术可阻隔90％以上施工扬尘、降低80％施工噪音。
六 | 走进气膜内部，眼前豁然开朗，比半个足球场还大的空间内无梁无柱。几台挖掘机正在进行土方回填作业，工人站在高空作业平台上，为新建工程的钢结构喷涂防火层。“气膜内部高度为22米，吊车、泵车、曲臂车等大型机械能自由通行。”麻石磊说，气膜能稳稳“站”住，靠的是一套完备的安全保障体系——两套鼓风机系统一用一备，使用双路电源，一旦停电，应急发电机立即启动，可快速补压，保障气膜结构稳定。施工现场虽然是密闭空间，但与室外相比并不闷热。“这是风机和空调的功劳。”麻石磊说，他们在气膜内安装了4台工业空调、4套送风系统，同时配备智能温控系统和气体检测设备，实时监控气膜内部的温度、湿度、氧气含量、有毒气体浓度等，为工人营造安全舒适的作业环境。保障施工进度，是基坑气膜的另一大优势。6月25日基坑气膜启用后，降雨、大风等因素都没有影响施工进度。“要是没有它，今年这雨情，我们至少要停工45天，排水、清淤等费用少说也得70万元。”麻石磊说。（日报记者 徐 华）。
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