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31. The speed of train is high, to ensure regularity of the upper track and reduce maintenance workload, the requirements of settlement after construction of subgrade are extremely stringent.

32. The jointless track on bridge is different from the jointless track laying on the traditional subgrade.

33. Taking a trial lot as example, this paper expounds the application of heavy tamping in the construction of subgrade focusing on its procedure, detection, quality control and result.

34. Tentatively, this study introduced simple and economical Dynamic Cone Penetrometer (DCP) and Impact Soil Tester (IST) for facilitating the investigation of subgrade and upgrading its quality.

35. This chapter covers subgrade works which include subgrade earthwork and rockwork, drainage project, subgrade protection project, and other related work.

36. Experimental results showed that the resilient modulus of unsaturated cohesive subgrade soils reduced with the increase of deviator stress and the decrease of matric suction.

37. The method and essentials of decreasing water content of over-wet subgrade fill are introduced by use of the principle of dewatering by electro-osmosis.

38. In the model, the flexural rigidity of mils, the rigidity of fastening, the rigidity of subgrade, slide plate[sentencedict.com], guard rail and spacer block are taken into account.

39. Applying for MARC software, three - dimensional numerical model of differential settlement at bridge - subgrade transition section was built.

40. It is the vertical migration that causes strong frost heave in the upper subgrade.

41. The key technology of subgrade design is solving the problem of subgrade frost heave in seasonal frozen soil area.