Study on Treatment Technology of Flexible Pillow Beam of High Fill Subgrade for Pavement Cracking Prevention
To solve the cracking problem of runway surface of high fill airport in collapsible loess area,the causes and distribution rules of crack diseases were analyzed in combination with field investigation.Based on the characteristics of diseases,the treatment technology of flexible pillow beam was put forward,and the applicable construction process was formed.The treatment effects of different treatment methods were comparatively analyzed.Results show that secondary cracking is easy to occur in emergency grouting.The surface milling and resurfacing and emergency grouting treatment are difficult to reinforce the subgrade,and treatment effects were limited.The flexible pillow beam treatment scheme of gabion mesh wrapped with gravel and outsourced geotextile can effectively solve the runway cracking caused by the instability of the subgrade and carry out targeted renovation of the subgrade in the cracking area,which has good treatment effect and engineering application value.
pavement engineeringcracking preventionfield testhigh fill airportsubgradeuneven settlement
万方数据
维普
