Research conclusions: The new railway construction concept of “putting people first ，strengthening the fundamental and weakening the trivial ，optimizing system and eyeing on the future" is not only the new railway construction concept， but also the basic concept for present railway design，and its intension has far-reaching significance. We shall remain those good things in our railway design concept and pay more attention to the things those are necessary to be improved in our concept. In the new period of time，we shall learn the advanced design concepts from foreign countries and continuously renew our design concept according to the requirement of the time.

Research Conclusions: The surveying devices will become lighter and integration with higher accuracy，more functions， easier operation，and digitisation ， modularisation and automation to collect and process the data. It is the general development trend of the survey technology for railway construction to establish construction survey and design data bank and improve the applicable mode of “Integration and Intellectualization” for railway survey and design in order to meet the requirements for more and more construction of high一speed railway and passenger dedicated railway line crossing and sea.

Research Conclusions: There are three development trends for photographic surveying and remote sensing being applied in Chinese railway construction. The first one is there will be three new breakthroughs in the aspects of space resolution， spectrum resolution and time resolution，through which the remote sensing network with low-resolution ， medium- resolution and high-resolution being relatively complemented each other will be formed in combination with high orbit， medium orbit and low orbit ， with the aid of large-sized ， medium-sized and small-sized satellites. The second one is photographic surveying and remote sensing along with“3G”technology will be applied widely in Chinese railway construction. The third one is the railway management information service system will be formed by adopting remote sensing technology along with virtual and realistic techniques. In this way ， the system can serve the public vividly and easily with computer.

Research Conclusions: Fabrication of aerial or satellite digital positive photography image pattern for railway by large-scale has the features of short period，becoming effective rapidly ， saving cost ， lowering the requirement for needing special technical devices and increasing the reality of information. The good economic and social benefits can be created if the digital positive photography image pattern is used for railway plan，railway design ， requisition of land for railway ， railway track maintenance and management of land. The vivid，rich and high geographic accurate information necessary for design can be provided for entire design of new railway line with all kinds of scaled positive photography image pattern made from high-resolution satellite image or aerophotographic image. If the Digital Elevation Model and positive photography image pattern are coincided each other along with all models of railway equipments，the 3-dimensional photography image of designed area can be obtained，besides，the real 3-dimensional landscape image can be realized if a flying route is added over the designed route.

Research Conclusions: It is necessary to make development of multidimensional design environment from 3-dimensonal design environment and make development of manually intelligent design from CAD. Establishing digital railway alignment experts system is a great innovation for the technology of railway alignment design. In this way，the production efficiency of railway alignment design can be much improved ， the design time can be shortened and the design quality be improved.

Research conclusions: Based on the systematic analysis and research，the heat stability ， ice content ， distribution of unfavourable frozen soil and its change regularity of the permafrost region in which the railway line crosses are found out which can provide basic guarantee for tackling difficult problems of construction of railway in permafrost region. The design idea and treatment principle of“lowering temperature actively，cooling subgrade and protection of frozen soil" are presented to the subgrade engineering，and the concrete type of engineering structure is also offered.

Research Conclusions: The analysis and comments are made on the requirements and the technical indexes of rail sub-rail foundation，fittings and ballast bed for track structure of passenger dedicated railway line and high-speed railway in many countries，and the thinking is offered for development of the key track technologies.

Research conclusions: China has researched and manufactured new durable materials for railway bridge，designed advanced and reasonable structures of railway bridge，and has advanced manufacturing and construction techniques and equipments. However it is necessary for China to make further scientific and technical research on some fields of it.

Research Conclusions: These are the development trends of construction machinery for building trade that construction machinery has high construction efficiency and good operational performances，and can meet the requirement for environment protection. It is the requirement for strengthening the management work of construction machinery to adopt different management mode to the different construction projects，different sizes of enterprise and different organization functions.

Research Conclusions: On the basis of review of the development experience of railway construction management in China，summary of successful experience and analysis of present management situation，the new management thinking is proposed ， namely systematic management ， legal management ， humane management ， intensive management and harmonious management ， the great blueprint of management reform of railway construction in future is prospected，and the qualitative prediction is made for adjusting relation between government macro management and project micro management ， improving trust system for railway construction market ， promoting reform of financial leasing for railway， normalizing the relation between authority and responsibility of management department ， and improving information management level for railway construction.

Research conclusions: By concluding and comparing analysis，this paper discovers that sustainable perfecting and developing of the market make the financing technologies appear the trends of diversification. Diversification of financing technologies has supplied many platforms to the leap-forward development of railway. It is not technological problem to railroading financing but a series of reasonable systems.

Research Conclusions: The 23 basic principles for design and construction of mountain tunnel and 12 basic principles for design and construction of shallow-depth surface excavation tunnel are presented.

Research Conclusions: The description is given to the bridge rigidity with change rates (curvature)of lateral direction , vertical direction and angle of torsion at beam ends and other locations under the design load，and the reference limit value is derived for designing rigidity of railway large-span prestressed concrete continuous beam bridge(rigid structure).With this method not only can the rigidity of simple-supported bean be described easily and conform to the existing standards，but also can the rigidities be described easily for large-span bridge and special beam structure those are not covered by the existing standards. This method and its research achievement are hopeful for improving the research and design level of bridge rigidity and providing technical support for development of larger-span bridge.

Research conclusions: “Code for Design on Retaining Structures of Railway Subgrade” in China is a special code for design on retaining structure of railway subgrade and stipulates the requirements for design，calculation and structure for the retaining structures，which is convenient to use. This code is very useful for design and technology improvement of railway retaining structure.

Research conclusions: It is believed that the requirements of structural function of the subgrade in permafrost region can be satisfied by making design of subgrade structure in accordance with the frozen condition of“enclosed system”，filling the active layer on the surface by unfrozen coarse materials and making design of the rest parts of the subgrade like ordinary subgrade，after the permafrost is treated in accordance with the geological conditions and ground temperature condition and upper limitation of permafrost is no longer lowering.

Research Conclusions: In order to meet the high requirement of 200 km/h line，the primary countermeasures are proposed for track maintenance，including inspection ， operation ， strengthening management of rail ， track structure， inspection of long slope，large-sized machine maintenance，ballast management ， solving the problems of curve，switch position and slope improperly ， testing and deciding tolerance values of dynamic and static irregularity of 200 km/h line， strengthening person training ， establishing all kinds of systems and regulations，guaranteeing skylight subgrade drainage and well doing the protection work of track. Also the issues necessary for being further studied are proposed，including introduction of large-sized machines and their match，research and development of inspectional and operational tools under static status，finding out the law of preventive grinding ， finding out the law of subgrade settlement in order to guarantee the even of transition area，improving rigidity of bridge against disturbance deformation，taking overall measures in the areas of design，fabricating and construction for improving the regularity of switch structure and switch area and the vibration on bridge and bridge fatigue caused by 200 km/h train.