隔离层对水泥砼路面减振缓冲性能影响及应用研究

发布时间：2018-04-27 16:38

  本文选题：水泥混凝土路面 + 隔离层　； 参考：《长沙理工大学》2014年硕士论文

【摘要】：车辆在水泥混凝土路面上行驶时,由于路面的不平整,不规则坑槽,会产生较大振动。振动的同时,车辆会对路面产生较大的冲击作用,这个冲击作用增大了路面和基层的作用应力,使路面产生疲劳破坏,缩短了道路的使用寿命。根据这一现象,本文提出在水泥混凝土路面面层与基层之间增加一层隔离层,缓解车辆行车时对路面的冲击作用,起到减振缓冲的效果。不同交通量不同车况区域使用何种隔离层才能有效保护路面尚无标准可查。本文通过对现有几种隔离层材料的减振缓冲性能进行分析,得出其减振缓冲规律。本文对水泥混凝土路面层间作用机理进行了分析,并使用振动测试仪分别做了室内试验和室外试验。室内试验中,对在不同隔离层材料下的水泥混凝土板进行冲击试验,并分别记录不同条件下的振动波形。室外试验是在太古高速一段试验路上进行现场振动波形测试,分别记录下不同隔离层时各种不同车辆荷载和车速情况下水泥混凝土板的振动波形。通过对所得振动波形进行分析对比,得出不同隔离层条件下,水泥混凝土板的振动衰减规律。结果表明,铺设土工布、橡胶板等隔离层材料后,在冲击荷载作用下,水泥混凝土板振动有明显缓解,隔离层有一定的减振缓冲作用。工程实践以及研究结果表明,有一定厚度的土工布和橡胶板能有效缓解水泥混凝土面层受到的振动影响,吸收面层受到的冲击力,有减振作用。因此,本文研究内容在水泥混凝土路面隔离层的设计和施工中一定的指导价值,为进一步完善我国水泥混凝土路面隔离层技术提供科学依据,消除实际工程中使用隔离层的盲目性,减少工程风险,优化工程投资,使路面寿命更长。
[Abstract]:When the vehicle is running on the cement concrete pavement, it will produce large vibration due to the uneven and irregular potholes of the road surface. At the same time of vibration, the vehicle will have a great impact on the road surface, which increases the action stress of the pavement and the base course, causes the fatigue damage of the road surface, and shortens the service life of the road. According to this phenomenon, this paper proposes to add a layer of isolation layer between the surface of cement concrete pavement and the base course, to alleviate the impact of vehicle driving on the road surface, and to play the effect of damping and buffering. What kind of isolation layer can be used to effectively protect the road surface in different traffic volume and different traffic condition area is not yet standard to be checked. In this paper, the damping and buffering performance of several kinds of isolation layer materials are analyzed, and the damping and buffering laws are obtained. In this paper, the mechanism of interlayer action of cement concrete pavement is analyzed, and indoor and outdoor tests are done by using vibration tester. In the laboratory test, the cement concrete slabs with different isolation layers were tested by impact test, and the vibration waveforms under different conditions were recorded respectively. The field vibration waveform of cement concrete slabs under different vehicle loads and vehicle speeds were recorded in the outdoor test on the test road of Swire high speed, and the vibration waveforms of cement concrete slabs were recorded under different isolation layers. Through the analysis and comparison of the vibration waveforms obtained, the vibration attenuation law of cement concrete slabs under different isolation layer conditions is obtained. The results show that after laying geotextile and rubber sheet, the vibration of cement concrete slab is obviously alleviated under impact load, and the isolation layer has a certain effect of damping and cushioning. The engineering practice and research results show that a certain thickness of geotextile and rubber sheet can effectively alleviate the vibration of cement concrete surface, absorb the impact of surface layer, and reduce vibration. Therefore, the research content of this paper has certain guiding value in the design and construction of cement concrete pavement isolation layer, and provides scientific basis for further improving the technology of cement concrete pavement isolation layer in our country. The blindness of using isolation layer in practical engineering is eliminated, the engineering risk is reduced, and the project investment is optimized to make the pavement life longer.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U416.2
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本文编号：1811489