Analysis of Construction Technology and Engineering Application of Expressway Subgrade Compression
In view of the problems of low compaction degree and poor stamping effect in the process of subgrade compaction construc-tion of expressway engineering,this paper studies and analyzes the construction technology and engineering application of subgrade compaction of expressway.First of all,determine the subgrade soil conditions,and the filling layer placed on the sand cushion,deter-mine the maximum density of loose thickness.Secondly,the pavement is rammed three times,the subsidence degree is measured and the pavement is smoothed by filling soil.Finally,according to different strength of stone,three times of compaction work,adjust the working intensity of compaction machinery,so as to control the maximum particle size range of filling,and achieve roadbed compaction and quality control.The test results show that the static pressure data value is always less than 0.5 MPa,the settlement of soil layer is stable within 90 mm and the degree of roller compaction conforms to the standard after roller compaction with different specifications,the maximum stress of the strong vibration is more than 1.5 times of the static pressure.The results are in accordance with the expecta-tion.
万方数据
维普
