关键词: 芦苇, 加筋土, 轻型击实, 无侧限抗压强度

Abstract: This article carried out a series of experimental studies on the strength and deformation of saline soil in Bohai New Area. First, the saline soil in the Bohai New Area was evenly mixed with reeds of different lengths and reinforcement rates, and a light compaction test was carried out based on a certain compaction power. Then, in order to test the compaction effect, it was subjected to an unconfined compressive strength test. The test results show that the mass reinforcement rate has a significant impact on the test results. The maximum dry density will gradually decrease as the reinforcement rate increases. The decrease range is between 0.01 g/cm³ and 0.02 g/cm³ per level. At the same time, the mass reinforcement rate also has a great influence on the optimal moisture content. The optimal moisture content will increase as the reed content increases. This trend will decrease as the reinforcement rate increases. When the mass reinforcement rate reaches 0.3%~0.35%, the maximum difference between the optimal moisture contents is only 0.38%. At this time, the influence of the reed content on the optimal moisture content can be ignored. Similarly, the length of reinforcement also has a significant impact on the compaction test. As the maximum dry density of reed-reinforced soil decreases with the length of reinforcement, the dry density will gradually decrease in a nearly linear trend. The dry density decreases by approximately 0.01~0.02 g/cm³ at each level of reinforcement length. When the reinforcement length is small, the optimal moisture content shows a nearly linear growth trend with the reinforcement length. When the reinforcement length reaches 50 mm, the change of the optimal moisture content is relatively stable due to the influence of the reinforcement rate. When the reinforcement length is too long, Excessive mass reinforcement rate may lead to a decrease in the optimal moisture content. The most obvious position appears at the length of 70 mm and the reinforcement rate of 0.35%. According to the unconfined compressive strength test, we can regard the reed reinforcement length as 50 mm and the mass reinforcement rate as 0.25% as the optimal reinforcement length and mass reinforcement rate.

Key words: reed, reinforced soil, light compaction, unconfined compressive strength