森林工程2017，Vol.33Issue(6)：77-82,6.
依据现场监测数据评价城市道路软土地基处理效果
Evaluation of Soft Foundation Treatment of Urban Road Based on Field Monitoring Data
摘要
Abstract
In order to evaluate the effect of soft foundation treatment and determine the reasonable unloading time , the surface settlement, excess pore water pressure and cross shear strength data typical monitoring section were selected and analyzed .Results show that: in the total settlement of soft soil foundation , the filling period was the main part , which was close to 60%, and the set-tlement of the preloading period accounts for about 35%.It was assumed that the post construction settlement of soft soil foundation proves that the settlement after construction was greater than 30cm in the first three months of the preloading period .Then, with the increase of the preloading time , the post-construction settlement decreased , but the performance was not very obvious .During the whole loading period , the change of excess pore water pressure showed a changed of the wave type , and the pressure in shallow layer was larger than that in deep layer .With the increase of surcharge preloading time , the excess pore water pressure at different depths decreased gradually and gradually approaches in soft soil foundation .In the soft soil layer , the shear strength increased obviously by preloading drainage consolidation , and the shear strength of the cross plate before preloading was increased by 6~8 kPa, compared with that before the drainage consolidation .The shear strength growth rate would decrease with the increase of shear depth , and the growth rate was between 26.3%and 91.0%.The research will provide a reliable basis for the design and construction of soft soil in this region .关键词
现场监测数据/软基处理效果/地表沉降/超孔隙水压力/十字板剪切强度Key words
Field monitoring data/the treatment effect of soft soil foundation/ground surface subsidence/excess pore water pressure/cross shear strength分类
交通工程引用本文复制引用
刘红军,钱大伟,李洪峰..依据现场监测数据评价城市道路软土地基处理效果[J].森林工程,2017,33(6):77-82,6.基金项目
住房和城乡建设部科学技术项目(2011-k5-36) （2011-k5-36）
黑龙江省青年科学基金项目(QC2012C080) （QC2012C080）
