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Investigatingconstruction Methods for Longtan Dam

机译：龙滩大坝调查施工方法

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Roller-compacted concrete (RCC) is zero-slump concrete placed and compacted with earth-moving and paving equipment, such as dump trucks, bulldozers, and vibratory rollers. Following its birth in the 1960s, RCC became widely used to build pavements and dams. Since building its first RCC dam in 1986 at Fujian Province, China has made significant progress and breakthroughs in dam style, raw materials, design, and construction methods and will soon be home to the world's tallest RCC dam with RCC currently being placed. Longtan Dam, started on July 1, 2001, and scheduled to be completed in December 2009, will have a height of 710 ft (216.5 m). Longtan Dam is located in a semi-tropical climatic zone in Guangxi Province, China. Weather conditions in this region are characterized by hot temperatures and a long rainy season. With rapidly changing conditions that include 84 days per year with a rainfall of 0.024 to 0.4 in. (0.6 to 10 mm) and high temperatures up to 102 ℉ (39 ℃) in July, the weather can seriously disrupt RCC construction. Due to its height and large volume, there are a great number of horizontal construction joints, and many of them may become cold joints (surfaces aged beyond initial set) during construction.
机译：碾压混凝土（RCC）是零倾倒混凝土，用诸如推土机，推土机和振动压路机等土方和铺路设备压实。自1960年代诞生以来，RCC广泛用于建造人行道和水坝。自1986年在福建省建设第一座RCC大坝以来，中国在大坝的样式，原材料，设计和施工方法方面取得了重大进展，并取得了重大突破，并且很快将成为世界上最高的RCC大坝的所在地，目前正在铺设RCC。龙滩大坝始于2001年7月1日，计划于2009年12月竣工，其高度为710英尺（216.5 m）。龙潭大坝位于中国广西省的半热带气候区。该地区的天气条件是高温和雨季长。随着条件的迅速变化，包括每年84天的降雨和0.024至0.4英寸（0.6至10毫米）的降雨量以及7月高达102℉（39℃）的高温，天气会严重破坏RCC的施工。由于其高度和体积较大，因此存在许多水平施工缝，在施工过程中，许多水平缝可能会变成冷缝（表面老化超过初始设定值）。

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