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路基沉降控制对于公路交通的正常运行极为重要。针对川汶公路K95+300~K95+490段的路基沉降变形问题,在分析其变形特征及机制的基础上,采用沉降计算与MIDAS/GTS软件进行有限元分析的方法,对其治理措施进行研究。结果表明:治理前路基的计算与模拟最大沉降量均超过80cm,与实际一致;加入钢管桩和框架梁后,最大沉降量降至77cm左右,仅减小了约5%,路基仍有很大沉降量,治理效果不佳,与实际情况较符合;改为CFG桩复合地基后,计算与模拟的最大沉降量分别降低到了7.2cm与10.8cm,理论上减少了90%左右的沉降量,较好地控制了路基沉降变形,因此可选用CFG桩复合地基进行处理。
Subgrade settlement control is very important for the normal operation of highway traffic. Based on the analysis of the deformation characteristics and mechanism of subgrade settlement in K95 +300 ~ K95 + 490 of Chuan-Wen Highway, the method of settlement calculation and MIDAS / GTS software is used to study the control measures. . The results show that the maximum subsidence and the maximum subsidence of the subgrade are more than 80cm, which are consistent with the actual ones. When the steel pipe pile and the frame beam are added, the maximum subsidence is reduced to about 77cm, only about 5% Large settlement and poor treatment result are in good agreement with the actual situation. After changing to CFG pile composite foundation, the maximum settlement of calculation and simulation is reduced to 7.2cm and 10.8cm respectively, theoretically reducing the settlement by about 90% Better control of subgrade settlement deformation, so can choose CFG pile composite foundation for processing.