Old Marshall design method is mainly adopted for AC-25C type asphalt mixture.This paper demonstrates the disadvantages in old Marshall design method,via lab experiments,it analyzes feasibility and necessity in adopting new Marshall method in AC-25C type mixture design,and gives relevant technical requests about adopting new Marshall methods in AC-25 mixture design.

总结质量数据化管理的难点和困惑,分析质量数据化管理中假资料产生的原因,提出在建设过程中用可视信息来直观反映工程质量的解决方案,对质量数据化管理到可视化管理的创新进行探讨。

高速公路施工遗留问题处理工作不仅关系到社会稳定,还关系到施工单位施工结束后能否顺利撤场。分析撤场前面临的不利因素,介绍水界高速公路在遗留问题处理工作中的组织领导、排查问题、明确职责、完善政策、提前谋划、规范行为、创新手段等方面的基本做法,可为高速公路施工遗留问题处理,确保施工单位顺利撤场提供参考和借鉴。

介绍水界高速公路的建设过程,并对项目特点、建设管理过程中的亮点与不足进行探讨。

Mechanism of tunnel surrounding rock collapse was studied and the mutation model built in this paper was proved to be a valid method to explain the phenomena of collapse in case of tunnel excavation through soft rock mass.Based on the model,the effect of the parameters such as stiffness,intenerating coefficient affected by water, and geometry-mechanic relationship was studied,the analysis showed that these parameters had great influence on the soft rock mass stability,the point at intersection collection could be considered as the point of system instability, when outer condition and inner property changed,the system could span the intersection collection and became insta- ble.Then the measures for soft rock mass collapse control in deep-buried tunnel such as prevention and cure of groundwater,pre-supporting,control blasting and monitoring was put forward and a good guide to the tunnel construc- tion could be provided.

针对高速公路建设中各合同段资金紧张的问题,提出变更的审批质量和审批效率概念,对影响变更的审批质量和审批效率的因素进行分析,提出提高审批质量和审批效率的对策。

On cement concrete deck slab it's usually required that the flexible waterproof layer is constructed.So the deck pavement structure differs from common pavement structure in mechanical performance.The paper analyzes influence of the factors such as thickness,modulus and poisson ratio of paving materials,thickness and modulus of waterproof layer as well as auto load on the maximum shear stress of water proof layer.Analysis shows that thickening asphalt overlay can distinctly reduce the maximum shear stress as the thickness of asphalt overlay is less than 10cm.Setting up the waterproof layer may effectively lower the maximum shear stress of asphalt overlay's bottom,that is advantageous to homogeneous dispersion of driving load.The paper analyzes the rationality of standards for shear strength of waterproof layer as well.

It is important that monitor measuring was applied in tunnel in regard to NATM. In this paper, the monitor measuring of NATM was studied in one tunnel in express. Based on the regularity and conditions of the surrounding rock deformation of monitor measuring in site, the Grey model is successful used to forecast the tunnel deformation. The optimum time for primary and permanent supports are obtained which averting successfully accidents in construction, which indicated that the forecast results are in good accord with monitor data. This measure insured to enhance the construction qualities and guide to Highway tunnel construction in Karst areas.

Based on the careful investigation in site of highway tunnel,the classification of tunnel disease is obtained.According to the reconnaissance,design and construction of tunnel,in relation to the distribution of stress and loading of tunnel by numerical analysis and back analysis,the existing condition and reasons of tunnel diseases are carefully analyzed.At the same time,the disease management methods are provided,which are important to guide similar tunnel to search diseases reasons and manage diseases.