京沪高速铁路凤阳试验段旁压试验与分析

为研究京沪高速铁路路基的沉降变形规律，在凤阳试验段DK854+680和DK854+740工点开展旁压试验，探求路基下深厚粘土的物理力学性质。旁压试验表明，凤阳老粘土基本承载力为429.06～437.89MPa，旁压模量Em为21.50～23.65MPa。对比该段土层室内土工试验，静力触探以及旁压试验的结果，说明室内土工试验得到的压缩模量偏小，试验数据不合理；旁压试验和静力触探数据较为一致，数据可直接用于工程设计。

Lateral Pressure Test and Analysis of Fengyang Test Section in Beijing-Shanghai High-speed Railway

In order to research the settlement law of Beijing-Shanghai high-speed railway subgrade, lateral pressure test is conducted in Fengyang test section DK854 ＋ 680 and DK854 ＋ 740 respectively to seek for the physical and mechanical properties of deep clay under subgrade. It is shown from lateral pressure test that the basic bearing capacity O＇o of Fengyang aged clay is 429. 06 - 437. 89 MPa and the modulus of lateral pressure is 21.50 - 23.65MPa. Through comparison of the resuhs from indoor geotechnical test, cone penetration test and lateral pressure test, it is indicated that the modulus of compression from indoor geotechnical test is smaller, which obtained unreasonable test data. The data from lateral pressure test and cone penetration test are basically consistent, which can be directly used for engineering design.