Stress Response of Expressway Pavement Under Different Pavement Structure Parameters
In order to study the stress characteristics of expressway pavement under different pavement structure parameters,the influ-ence of uneven settlement of subgrade on additional stress of pavement structure is analyzed by numerical simulation method,the results show that:(1)With the increase of the differential settlement of the new and old roadbed,the maximum additional stress of the pave-ment structure increases linearly.(2)Under the condition of the same base modulus,with the increase of the base thickness,the maxi-mum bending-tensile stress of the pavement structure increases.(3)With the increase of pavement layer modulus,the maximum ben-ding tensile stress of pavement structure under different pavement layer thicknesses increases gradually.(4)In the highway expansion project,it is suggested to take reinforcement measures for the new subgrade,it can reduce the uneven settlement of the new and old roadbed,and select the proper thickness of the base and surface to prevent early cracking and late rutting of the pavement.
NETL
NSTL
万方数据
维普
