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软土的物理力学性质差,具有天然含水量大、强度低和易受扰动影响等特性。高速公路路面的造价昂贵,技术标准高,对路基变形与稳定性的要求十分严格。这些都使得软土地区高速公路的变形与稳定性控制成为高速公路路基工程中遇到的主要技术难题。因此,在高速公路软基施工中,就必须对地表沉降和地表水平位移实施监控,以控制路堤的填筑速度,使路基变形控制在规定范围内。
The physical and mechanical properties of soft soil is poor, with natural water content, low intensity and susceptible to disturbance and other characteristics. High cost of highway pavement, high technical standards, the deformation and stability of the road is very strict requirements. All of these make the deformation and stability control of expressway in soft soil area become the major technical problems encountered in expressway subgrade engineering. Therefore, in the construction of highway soft ground, it is necessary to monitor the surface subsidence and the horizontal displacement of the ground to control the filling speed of the embankment so that the subgrade deformation is controlled within the specified range.