Research On The Technology Of Construction By Stages For Asphalt Pavement In Pearl River Delta

The distribution of soft soil in the Pearl River Delta region is characterized by large deformation,long ground consolidated time and big lateral deformation,etc.In this kind of poor foundation to construct highway,although the corresponding treatment measures were taken,after a period of operation often appear the phenomena such as bridge jumping,road damage and other phenomena,the main reason is due to the long time of stability of the foundation settlement and the Poor soil properties,the uneven subsidence,resulting in road damage.Another reason is that foundation reinforcement after the post-construction settlement caused by changes in the road,resulting in post-construction settlement close to or even more than the provisions of the provisions of post-mortem settlement.In view of this,this paper examines the existing roadbed and pavement norms,combined with the practice of highway construction in the Pearl River Delta region,and puts forward that in the highway construction of the soft soil foundation of the Pearl River Delta,through optimizing the decision-making method of soft foundation treatment,The construction quality of the following layer,to be completed in the lower reaches of the opening of the traffic after the completion of a certain number of years after the foundation settlement stabilized,and then laying the top layer of the method.The subject focuses on solving the related technical problems.Including the analysis of the soft soil characteristics in the Pearl River Delta region,the evaluation of the pavement use status in the Pearl River Delta region,the fuzzy comprehensive evaluation and decision-making scheme for the Pearl River Delta soft foundation,the gray theory to predict the settlement of the roadbed,the second stage pavement crack prevention and control measures Construction considerations;one-time implementation and phased implementation of the program for life cycle economic analysis and comparison.This paper studies the technical feasibility and economic rationality of the phased implementation plan,puts forward the control focus of the construction of the second stage construction,clarifies the relevant measures,uses the fuzzy mathematics theory to optimize the decision of the soft foundation treatment,and according to the measured data The GM(1,1)model is established to provide the basis for determining the laying time of the second stage,and the effect of the engineering practice is guided by the research results.After the success of this research,it can be widely applied to the construction of soft rock in the Pearl River Delta,and it can also be used in other bad ground areas.