The development of society pushes people to pay increasing attention to the appearance of bridges apart from their quality and safety. It turns to be an inevitable trend of the emergence of bridges with novel forms and unique shapes, which could not only meet traffic demand, but also effectively integrate with their surrounding environment to form a beautiful landscape. However, complicated structure and unique shape make it difficult of the bridge construction. As the basic part of construction, pier model affects the construction of pier formwork and pier reinforcement. Currently, BIM has been widely used in the construction industry in China. Nevertheless, there has not been any cases of the formwork design nor reinforcement processing of spatial three- dimensional special-shaped pier. And it is the first time for the construction of spatial three-dimensional special-shaped bridge. So it is of great significance of the analysis on spatial three-dimensional technology of special-shaped pier based on BIM to promote the development of construction industry.

Counting only the usable land, the population in Hong Kong is as dense as 34,000 people per square kilometer, and it has a highly efficient multi-modal public transport system. According to the experience of Hong Kong public transit system, highly reputable public transport services reveals that the the viability and sustainability of mass transit railways depend very much on accompanying transport policies and land development strategies. The ways to reduce traffic congestion from supply measures to demand management and change the transit mode from vehicle to railway are both based on Hong Kong’s actual situation. Finally this article emphasis on sustainable transport is a great experience which needs research with more in-depth thinking, and the evolution of public transport policy in Hong Kong is a good inspiration for the public transit development in the other great cities in the world.

With the gradual improvement of urban construction, urban construction land increasingly tense, the lack of land caused by the formation of expensive land premium. Alterations and new construction is basically plug-in embedded, the original underground, the building on the protection of the building is also increasingly diverse and complex, the construction is also increasing the difficulty. The safe use of existing facilities and the safety of construction are problems that must be addressed in urban construction.

In order to improve the quality of the relevant construction development activities and effectively meet the special requirements of the design and construction of large span concrete bridges, the safety, effectiveness and economy of the bridge are fully enhanced. In this paper, the spatial structure of the long span concrete bridge is very special. As well as environmental adaptability, technical staff should be based on the development of large and span concrete bridge construction activities of the actual needs of large-span concrete bridge for scientific design and planning, but also the construction technology application activities for scientific supervision. The purpose of this paper is to explore the scientific and efficient application of stress monitoring in the construction process of large span concrete bridge under the guidance of the relevant theory of construction from the perspective of stress monitoring, so as to ensure the accuracy of construction activities and promote the development of bridge orderly development.

Activated sludge process is the most widely used technology in sewage bioremediation up to now. However, there is also a serious problem with this technology, that is, a great amount of sludge will be left over. In view of this situation, a study has been carried out through the domestic activated technology for sludge treatment and also research on the effective sludge treatment. They made use of the microbial decomposition to decompose the oxide by using the means of physical, chemical, biological, etc. to minimize the effluent from the sewage treatment plant and thus, reduced the amount of sludge produced.