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新疆大部分地区昼夜温差较大,在地处塔克拉玛干沙漠边缘的南疆地区,新疆桥梁工程处在国道315线喀什地段修建的南关桥、北大桥桥面都因昼夜温差较大出现了纵向裂缝和横向裂缝,影响了桥梁的外观质量和正常使用。针对这种情况,在喀什七里桥的修建过程中,新疆桥梁工程处首次将聚丙烯纤维混凝土应用到桥面施工中,并在施工过程中严格控制施工工艺,避免了桥面因使用普通混凝土干缩裂缝的出现和扩展,桥面
Large temperature difference between day and night in most parts of Xinjiang, located in the Taklimakan Desert edge of the southern region of Xinjiang Bridge Engineering Branch in the State Road 315 Kashgar section of the construction of the South Gate Bridge, North Bridge deck due to larger temperature difference between day and night longitudinal cracks And horizontal cracks, affecting the appearance of the bridge quality and normal use. In response to this situation, in the process of building the Kashgar Qili Bridge, Xinjiang Bridge Engineering Department first applied the polypropylene fiber concrete to the bridge deck construction, and strictly controlled the construction technology during the construction so as to avoid the use of ordinary concrete bridge deck The emergence of shrinkage cracks and expansion of the bridge deck