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对区域性软土的工程特性及沉降规律的研究,在高速公路的建设中具有重要的现实意义。在大量土工试验的基础上,结合四川省遂—资高速公路软基变形监测数据,系统分析山区沟谷型软土工程特性,并总结软基沉降变形规律,主要结论如下:①软土分布均匀,主要为高、低液限黏土,软土物理力学指标较我国部分沿海地区低,而力学指标要高;②主要物理力学指标有较好的线性相关性,可用于软土物理力学参数的预测和控制;③固结系数随应力增大表现为非线性–线性降低的趋势。软土蠕变是非线性的,与时间相关,依据蠕变曲线的3种形态可对主次固结进行划分;④在数据分析的基础上给出了塑料排水板、碎石桩处理后,软土层厚度与沉降量在不同填高情况下的数学关系式。
The research on engineering characteristics and settlement law of regional soft soil has important practical significance in the construction of expressway. Based on a large number of geotechnical tests, combining with the deformation monitoring data of soft ground in Suining-Zi-Su Expressway in Sichuan Province, the engineering characteristics of mountain valley soft soil are systematically analyzed and the settlement regularity of soft ground is summarized. The main conclusions are as follows: Mainly for high and low liquid-limit clays, the physical and mechanical indexes of soft soil are lower than those of some coastal areas in China, while the mechanical indexes are higher; ② The main physical and mechanical indexes have good linear correlation and can be used for the prediction of physical and mechanical parameters of soft soil Control; ③ consolidation coefficient increases with the stress as a nonlinear - a linear trend. The creep of soft soil is non-linear, time-dependent, and the primary and secondary consolidation can be divided according to the three forms of creep curve. (4) Based on the data analysis, plastic drainage board and gravel pile Mathematical Relationship between Soil Thickness and Settlement under Different Hypertrophy.