A Study On The Modulus Valuing And Compacting Quality Controlling Of Xigeda Filling Material Roadbed Of Xichang-Panzhihua Highway

Modulus of resilience which represents stress-strain properties of the roadbed and material strength of the roadbed is a very major parameter in road surface designing. In the highway blacktop design criterion(TJT014-97), four methods are recommended to the value of the modulus of resilience of the roadbed. However, the limitation of the methods induce disconnection between the designing modulus index and the compaction in the process of field construction. On the basis of field investigation and a lot of tests, the paper detailed researches the engineering geology properties of xigeda filling material. The distinction of the modulus of resilience was analyzed ,and the influence of the intrinsic factors including moisture content, dry density , mudstone content and the external factors including compaction mode, paving thickness were adequately discussed. Based on the researching how various factors influence the road compaction effectiveness ,the author studied the relationship between modulus of resilience and roadbed compaction quality index, connected the compactness with modulus, and listed the data of the modulus in the various compaction area.To discuss farther the relation between compaction and deformability, moreover bring forward the reasonable method of roadbed compaction quality detection, the writer used the settlement data of the roadbed to validate father the correctness of the modulus value; and demonstrated that it was not reasonable that the compactness is regarded as the only index representing compaction quality in the criterion, and demonstrated that the modulus of resilience is a credible index which represents compaction quality by contrasting the deformability of roadbed modes in the different compacted condition . It was a new method to test reasonably roadbed compaction quality which connected compactness with modulus in the process of construction.