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在软土地基上进行高填方路堤拓宽,从路基沉降和施工中稳定控制两方面考虑,地基侧向变形都是十分重要的。针对某项采用碎石换填处理措施的高填石路堤拓宽工程,选取其中典型断面,通过埋设边桩和测斜管对拓宽地基进行侧向变形的施工动态监测。监测结果表明:当地基软土层较薄时,采用碎石换填的地基处理方法能够在一定程度上减少地基的侧向变形;拓宽路堤的宽度和高度对地表水平位移的变化量有影响,拓宽高度的影响更加明显;高填石路堤拓宽工程中,地表水平位移的影响范围在10m内;当拓宽路堤的重心作用在拓宽地基上时,地基产生的侧向位移占总位移的80%以上。
On the soft ground embankment to expand high embankment widening, from the subgrade settlement and stability control in the construction of two considerations, the lateral deformation of the ground is very important. Aiming at the widening project of a high embankment embankment with gravel-replacement measures, the typical sections of the embankment are selected, and the lateral dynamic deformation monitoring of widened foundations is carried out by embedding side-columns and inclinometers. The monitoring results show that when the foundation soft soil layer is thinner, the ground treatment method using gravel replacement can reduce the lateral deformation of the foundation to a certain extent; widening the width and height of the embankment have an impact on the horizontal displacement of the surface, The impact of widening height is more obvious. In the widening of embankment with high rockfill, the influence range of horizontal displacement of ground surface is within 10m. When the center of gravity of widening embankment widens the foundation, the lateral displacement generated by the foundation takes up more than 80% of the total displacement .