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管涵土压力作为管涵结构设计中的主要恒定荷载,其作用模式的确定是研究的重点。通过开展三种不同填土工况(碎石、粉土、黏土)下的管土相互作用足尺物理模型试验,得到不同填土工况下马蹄形管涵土压力的作用模式,并对比填土类型对管涵土压力的影响。结果表明:试验条件下,粉土工况的管顶土压力集中效应表现最强,黏土工况最弱,碎石工况介于中间。同时采取有限元软件对模型试验进行模拟分析,与试验结果较为吻合,从而为管涵土压力的进一步研究提供科学依据。
As the main constant load in the pipe-culvert design, the earth pressure of the culvert is the focus of the study on the determination of its mode of action. Through the full-scale physical model test of soil-soil interaction under three different filling conditions (gravel, silt and clay), the mode of action of earth pressure on the horseshoe-shaped pipe under different filling conditions is obtained and compared with the earth filling Influence of Types on Soil Pressure of Pipeline. The results show that under the test conditions, the top soil pressure concentration effect of silt condition is the strongest, the clay condition is the weakest, and the gravel condition is in the middle. At the same time, the finite element software is used to simulate the model test, which is in good agreement with the test results, which provides a scientific basis for further study on the earth pressure of the culvert.