工后沉降双指标控制理论在某公路软基处理中的应用研究

高等级公路建设越来越多地延伸到软土地区,但工程中采用的工后沉降量指标并不能完全消除路面开裂及不均匀沉降等病害的大面积发生。基于此,在提出软土地区公路建设工后沉降量及沉降速率双指标控制理论的基础上,确定了软土地区高速公路工后沉降速率控制标准,并以济(宁)—徐(州)高速公路济宁南四湖地区某高填土路段湖相软土地基处理工程为依托,在进行不同地基处理方法下工后沉降特性研究的基础上,依据工后沉降双指标控制理论,提出了适于该工程的公路软土地基处理技术,研究成果可供类似工程的设计参考。

Study on Application of Two-indicators Control Theory for Post-construction Settlement in Soft Soil Foundation Treatment of a Highway

Currently more and more high-class highway projects extend to soft soil area; however, the usage of post-construction settlement index in the engineering can not completely relieve the highway from massive occurrence of pavement cracking, uneven settlement and other diseases. Thus, based on the two-indicators control theory of post-construction settlement and settlement rate in highway construction in soft soil area, this paper defined the standard for control of post-construction settlement rate for highway in soft soil areas. In addition, depending on the lacustrine facies soft soil foundation treatment in a high-fill section in the Southern Four Lakes Area of Jining along Jining-Xuzhou Highway, this paper studied the characteristics of post-construction settlement under different foundation treatment methods, based on which the technology for soft soil foundation treatment and applicable to this project was proposed through the basis of the post-construction two-indicators control theory. The study result may provide references for similar engineering design.