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在对四川盆地软基特性研究的基础上,选取达渝高速公路K26+283标段为典型工点,利用有限差分软件FLAC3D对该工点进行沉降模拟,并与现场监测数据进行对比,证明了采用FLAC3D模拟四川盆地公路软基沉降过程的可靠性。四川盆地公路建设应用最广泛且行之有效的软基处治措施是塑料排水板和碎石桩,为了比较这两种处治方法的处治效果,该文以达渝高速公路K26+283标段物理力学指标为基础,建立了路堤高度分别为15、20m的模型,模拟地基沉降过程,得出了这两种处治方法对这两种路堤高度的适应情况及工期分布情况。
Based on the study of the soft foundation properties in Sichuan Basin, the section K26 + 283 of Da-Yu Expressway was selected as a typical working site. The settlement simulation was carried out by FLAC3D software and compared with the on-site monitoring data. Using FLAC3D to Simulate the Settlement of Soft Foundation in Sichuan Basin. The most widely used and effective soft foundation treatment in highway construction in Sichuan Basin is plastic drainage board and gravel pile. In order to compare the treatment effect of these two treatment methods, this paper takes the physical and mechanical indexes of section K26 + 283 of Da Yu Expressway As the basis, a model with embankment heights of 15 and 20m respectively was established to simulate the settlement process of the foundation. The adaptability of the two treatment methods to the height of the two embankments and the distribution of construction period were obtained.