1. Presently, the control of subgrade deformation is carried out by enactiving the allowable value to avoiding or minishing its effects in design stage.

2. Foundation settlement, which plays an essential role in subgrade settlement, is highly concerned in high-speed railroading.

3. Using subgrade and roadbed as case, the paper discusses the follow - up value of engineering dossier.

4. Subgrade earthwork and rockwork shall include: fill subgrade earthwork, cut subgrade, special subgrade treatment and other relevant activities.

5. The soft soil subgrade treatment should be adopted different measures according to the physical and chemistry characteristics of soft soil, buried layer depth, material condition and road.

6. The disease of subgrade in permafrost region was mainly induced by frost heaving and thawing circulation of frozen soils because of change of seasons.

7. Analysis procreant subgrade disease with raise speed of existing line.

8. To ensure subgrade compaction, we must resolve the choice of subgrade soil, moisture control, shop soil thickness control and detection of degree of compaction work.

9. It is suitable to calculate the quantities of subgrade protection and drainage project, especially in the draft design and predesign phase of the highway or railway.

10. By analyzing the subgrade settlement data of Hejiaping Joint Line, the research proves that the settlement value predicted with GM (1, 1) mode is feasible.

11. For a long time, the subgrade project quality testing and evaluation method follows the traditional excavation inspection and drilling and sampling test techniques.

12. For treatment subgrade diseases caused by water capillary rise, it is needed to acquire the law of capillary rise in the soil.

13. Based on the degradation model of subgrade reaction, a new method is proposed for calculation of pile bent with all straight piles.

14. In this paper the dynamic response to subgrade of highway under automobile load is researched.

15. Non-frost-heave soil such as sand with fine granule content less than 5%, gravel with fine granule content less than 15% and crushed rock can be used to build the anti-freezing layer of subgrade.

16. Thusly, the research for space-mega-frame structures under consideration of subgrade deformation has very important theoretical and practical meaning.

17. On this ground, study on dynamic property and dynamic parameter of weathered granite subgrade soil in repeated loading is quite essential.

18. The calculation method of average sand drain and the new modified method are discussed. The results can serve as a guide to subgrade design of soft ground.

19. With The direct wave method we only can work out the dry density of the topsoil of subgrade.

20. The surface deflection has linear change with base thickness and curve changes with subgrade resilient modulus and base resilient modulus.

21. It is shown that the track bending resulting from the settlement difference between bridge and subgrade is the main factor that influences the running safety and comfortization of high speed train.

22. The thickness used is 152 mm AC layer, 304 mm base layer, and infinite of subgrade.

23. If the gradient increases, the decline of the upper limit of frozen soil will be more significant, the core of thawy soil in subgrade will exist for a longer time during refreezing in winter.

24. The text show the method to transact soft base under subgrade by mudjack, plane furnish, hole site, confirm pressure, deep of bore and technics flow of mudjack.

25. The thawing settlement and frost heaving may bring the serious damage on the subgrade engineering in the seasonally frozen region.

26. The article deals with the necessity of data of beam deflection measurement on earthwork subgrade of municipal road engineering through integrating with engineering experiment.

27. In the model, the flexural rigidity of rails, the rigidity of fastenings, the rigidity of subgrade, slide plate, guard rail and spacer block are taken into account.

28. The article discusses how to improve the planeness of pavement mainly from subgrade, pavement subbase and the mixing, spreading and rolling of asphalt mixing material.

29. Answer 8 : the rolling stock yard shall use subgrade method.

30. It is shown that the distress resulted essentially from the instable integration and the incoordinate deformation between the existing subgrade and the widening one.

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, 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.