交通荷載作用下低路堤軟土地基室內(nèi)模型試驗(yàn)研究
[Abstract]:With the rapid development of transportation in China, there are more and more high-grade highways in soft clay area. In view of the practical engineering problem of the highway on soft clay foundation of low embankment, when the height of embankment fill is reduced, the traffic load is transferred to the soft soil foundation without sufficient diffusion in the embankment. The indoor test model of soft soil foundation highway is designed and made, and the dynamic response and settlement analysis of soft clay foundation under low embankment are studied by different factors of traffic load, and some laws are summarized through the analysis of test results. This is of great engineering significance in the construction of high grade highway with low embankment in soft clay area. The main contents of the paper are as follows: 1. Reading and collecting a large number of documents, including the embankment under traffic load, subgrade dynamic response, settlement and deformation of the paper and traffic load model test. To provide the necessary theoretical basis and reference value for the design of the test scheme; 2. The theoretical study of traffic load is carried out, and the description method of traffic load in this experiment is put forward by analyzing the characteristics and simplified methods of traffic load. The effect of traffic load on soft clay foundation of low embankment is further studied. 3. The preparation work of indoor model test, including material preparation, instrument debugging, test loading scheme design and so on, is carried out to prepare for the following main traffic load research. 4. According to the test results, the settlement and pore pressure changes of soft clay foundation under static action are simply analyzed, and the different frequency and strength of soft clay foundation under single point excitation of traffic load under low embankment are studied emphatically. Considering the influence of superposition effect between wheel loads on settlement deformation, soil pressure, pore pressure and acceleration, when different action time and double point excitation are taken into account, some rules are summarized. It can provide reference basis for the construction of high grade highway with low embankment in soft clay area in the future, which has certain engineering practical significance.
【學(xué)位授予單位】:河北大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類(lèi)號(hào)】:U416.12
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