路基强振压实工艺研究

发布时间：2018-07-29 14:36

【摘要】：路基是公路的基础,起着承载路面结构和行车荷载的作用。路基压实是公路施工中的重要环节,提高路基的压实质量是保证路基质量和使用性能的重要措施。施工常用的振动压路机吨位在20吨左右,近些年出现的超重强激振力压路机的吨位达32吨。但是这种新型压路机的压实性能需要研究,本论文通过对超重强激振力压路机的研究,为超重强激振力压路机压实路基的性能和工艺提供参考。本论文采用能够模拟实际振动压路机工况的室内振动压实机,研究静面压力和激振力等几种振动参数的提高对高液限粘土、土石混填材料、砂类土三种路基填料压实效果的影响。同时研究了不同振动条件下这三种路基填料含水率对压实质量的影响。通过提高振动压实机械的静面压力、激振力和选择最佳的含水率,能够提高这三种路基填料的振动压实干密度。室内试验在理论上验证了采用超重强激振力压路机压实路基能够提高路基压实质量。现场试验采用超重强激振力振动压路机与普通振动压路机分别对高液限粘土压实效果进行对比分析,发现强振压实方式下压实功作用深度更深,在保证压实度的条件下,功效更高。通过试验更加深入的掌握了超重强激振力压路机的压实性能。通过对强振碾压和普通振动压实两种压实方式进行经济分析,强振压实方式压实费用比普通压实方式费用低,强振压实方式由于提高了路基压实质量,公路使用期间的养护费也比普通振动压实低,具有更好的经济性,且能够增加路基使用的耐久性。
[Abstract]:Roadbed is the foundation of highway, which plays the role of bearing pavement structure and driving load. Subgrade compaction is an important link in highway construction. To improve the compaction quality of roadbed is an important measure to guarantee the quality and performance of roadbed. The tonnage of vibratory roller used in construction is about 20 tons. In recent years, the tonnage of overweight and strongly excited roller is up to 32 tons. However, the compaction performance of this new type of roller needs to be studied. This paper provides a reference for the performance and technology of the roadbed compaction of this new type of roller. In this paper, an indoor vibratory compaction machine, which can simulate the actual working conditions of vibratory roller, is used to study the effects of static surface pressure and exciting force on the high liquid limit clay, earth and rock mixed materials. Effect of three kinds of subgrade fillers on compaction effect of sand soil. At the same time, the influence of the moisture content of the three subgrade fillers on the compaction quality was studied under different vibration conditions. By increasing the static surface pressure, exciting force and selecting the optimum moisture content of the vibrating compaction machinery, the dry density of the three kinds of subgrade fillers can be increased. The laboratory test theoretically proves that the compaction quality of the roadbed can be improved by using the overweight and strong excitation compaction machine. In the field test, the compaction effect of high liquid limit clay is compared with that of ordinary vibratory roller and overweight vibratory roller. It is found that the compaction depth is deeper under the strong vibration compaction mode, and the compaction degree is guaranteed under the condition that the compaction degree is guaranteed. More effective. Through the experiment, the compaction performance of the overweight and strong excitation roller is further grasped. Through the economic analysis of two kinds of compaction modes, strong vibration compaction and ordinary vibration compaction, the compaction cost of strong vibration compaction is lower than that of common compaction, and the strong vibration compaction improves the compaction quality of roadbed. The maintenance cost of highway during use is also lower than that of ordinary vibration compaction, which is more economical and can increase the durability of roadbed.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U416.1

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