无切缝水泥混凝土路面设计与建造

发布时间：2018-01-14 05:25

本文关键词：无切缝水泥混凝土路面设计与建造　出处：《哈尔滨工业大学学报》2017年03期 　论文类型：期刊论文

【摘要】：水泥混凝土路面具有使用寿命长、养护工作量小、能耗低、施工简便等优点,但是水泥混凝土路面行车舒适度不如沥青混凝土路面.而舒适度不佳最主要原因是切缝的存在,使行车时产生"咯噔"跳车现象.此外,切缝的存在也将严重影响混凝土路面的耐久性,增加维修维护费用.针对上述问题,提出并实践了无切缝水泥混凝土路面设计与建造技术.设置高延性低干缩纤维增强水泥基复合材料(low shrinkage engineered cementitious composites)延性段取代传统混凝土路面切缝,LSECC可形成多条细微裂纹吸收两侧混凝土路面板的收缩和温度变形.通过施工现场模具和工艺设计,实现了界面锚固钢筋的定位和LSECC后浇空间预留及反射裂缝的定位,模具拆除后进行LSECC材料浇筑,实现了无缝路面的设计理念.
[Abstract]:Cement concrete pavement has the advantages of long service life, small maintenance workload, low energy consumption, easy construction and so on. However, the running comfort of cement concrete pavement is not as good as that of asphalt concrete pavement. The main reason for the poor comfort is the existence of cutting joints, which causes the phenomenon of "pounding" when driving. The existence of joint will seriously affect the durability of concrete pavement and increase the maintenance cost. The design and construction technology of cement concrete pavement without slit joint is put forward and put into practice. High ductility low dry shrinkage fiber reinforced cement matrix composite (. The ductile section of low shrinkage engineered cementitious composites replaces the traditional cut joint of concrete pavement. LSECC can form a number of fine cracks to absorb the shrinkage and temperature deformation of both sides of the concrete pavement slab through the construction site mold and process design. The positioning of interfacial Anchorage steel bar, the reservation of LSECC post-pouring space and the orientation of reflection crack are realized. The design concept of seamless pavement is realized by LSECC material pouring after the mold is removed.
【作者单位】：结构安全与耐久教育部重点实验室(清华大学);河北省廊坊市交通公路工程有限公司;天津华夏建筑设计有限公司;
【基金】：国家自然科学基金(51278278)
【分类号】：U416.216
【正文快照】： 水泥混凝土路面具有使用寿命长、养护工作量小、能耗低、施工简便等优点,因此在国内外获得了广泛使用[1-2].在美国高速公路网中,水泥混凝土路面近50%.在欧洲也有大量的混凝土路,例如比利时近50%的高速路是水泥混凝土路,法国每年建成的高速公路30%为混凝土路.中国水泥混凝土路

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