本文结合G314线库车至阿克苏高速公路二分指桥梁伸缩缝施工介绍了毛勒伸缩装置的施工方法和施工要点,并简要的分析了桥梁伸缩缝常见病害产生的原因。 In this paper, the construction methods and construction essentials of Mailer extension and contraction device are introduced based on the construction of two-point bridge expansion joint between G314 and Aksu Expressway. The causes of the common defects of bridge expansion joints are briefly analyzed.