Internship location: Wuhan, Hubei Province
Internship time: 3.21-3.25.
Instructor: Wang Calligraphy/Gao Rui
Intern: Lv Wei/01Class 203 /200 13 1550072.
Graduation practice is an integral part of the whole graduation design teaching plan, and it is also an important practical field of civil engineering specialty. Next, I will bring you the road and bridge safety production log, hoping to help you.
First, the purpose of internship
By organizing visits and listening to some special technical reports, we can collect some information and materials related to graduation design, which will lay a solid foundation for the smooth completion of graduation design. Through practice, the following objectives should be achieved:
1, understand the whole design process of general industrial and civil buildings or road and bridge projects;
2. Understand the general layout of the building, the classification and function of the building, the types and characteristics of the structure, the arrangement of structural members and the load transfer route, the details of the main node structure and the treatment methods. ;
3. Understand the building construction method;
4. Understand the relationship between architecture, structure and construction;
5. Understand the latest trends and development direction in the field of building structure.
Second, the practice method, place and content
According to the practice plan and schedule of the teaching and research section of road and bridge engineering, we conducted a five-day graduation practice, which was transferred to the construction site of Tianxingzhou Bridge in Wuhan and the stations along Wuhan light rail. The specific practice methods and places are as follows:
Date, week, method and place
3.2 1 A short film, Bishop of Engineering Department of Wuhan University
3.22 The second on-site inspection of Tianxingzhou Bridge construction site
3.23 Three technical reports of Tianxingzhou Bridge Construction Office
3.24 Four field trips along Wuhan Light Rail.
3.25 Lecture by Bishop of Five Engineering Departments
First, short film observation
In the morning, I mainly watched some road and bridge projects across the sea, river and river, and briefly reviewed the construction technology and process. First, the planning and design of Kaohsiung-Danshui Expressway in Taiwan Province Province. Through the plan demonstration, this project introduces the location of each mid-point city, the topography along the way and the connection of each branch road, and considers to build an expressway network along the island to connect with it, which also has outstanding performance in environmental protection-specially hire animal and plant experts to evaluate and test the impact on the environment during and after the construction of this project, and consider their research results in design and planning. This is obviously not enough in China. Later, I contacted the records of road construction and arch bridge construction in the United States and other countries one after another, and got a preliminary understanding of the new road and bridge technology.
In the afternoon, I continued to watch slides, in which the construction process of Yangluo Highway Yangtze River Bridge was simulated with dynamic and realistic three-dimensional animation, and the learning effect was obvious; Since then, the initial demonstration of the Shinkansen project in Tohoku, Japan and the construction of a large highway bridge in Thailand, although there are certain language barriers, still achieve multiple goals of cognition, learning and thinking because of the detailed system and repeated playback of the pictures.
The following briefly introduces the construction work of the above three projects in turn:
1, Yangluo bridge system is a suspension bridge.
Jiangsu Runyang Yangtze River Bridge currently under construction has a span of 1.490 m, making it the third largest suspension bridge in the world. The characteristic of suspension bridge is that it can span an unparalleled long span of other bridge types, and because of the simple and clear force, the rolled steel basket is convenient for transportation. After the cable is erected, a solid and stable structural support system can be formed, and the risk in the construction process is relatively small. The specific construction process of slide show of Yangluo Bridge is as follows:
(1) face surface treatment;
(2) the construction of the excavation groove section;
(3) North anchorage construction;
(4) Cable tower construction;
5] template pouring concrete tower;
[6] Installation of cable system of main bridge and installation of bridge segments.
Because the soil quality of the north and south banks of Yangluo Bridge is different, the construction scheme is different, and the soil quality of one side of the bridge is good, so it can be directly excavated. On the other hand, it belongs to sandy muddy soil, and concrete should be excavated downward at the excavation outer diameter of the ingot to make a retaining wall. It is particularly important to pay attention to process (2) and process (5). The former excavates and pours concrete from top to bottom to prevent collapse; The latter is caused by excessive hydration heat in mass concrete construction, which should be controlled.
2. Tohoku Shinkansen Project in Japan
This paper introduces the construction method of moving formwork used in the Shinkansen project in Tohoku, Japan. The method is to pour the bridge hole by hole by using mobile scaffolding and assembled formwork. It consists of bearing beam, guide beam, trolley, pier support and formwork. Load-bearing beams and supporting templates are set on both sides of the box girder to bear the construction gravity. The length of the guide beam is longer than the span of the bridge, and the bearing beam is supported on the pier when pouring concrete. The guide beam is mainly used to transport load-bearing beams and movable formwork, so it needs twice the span of the bridge. After the construction of one-hole beam is completed, demoulding and frame unloading are carried out, and the load-bearing beam and movable formwork are transported to the next bridge hole by the guide beam and the front and back trucks on the completed bridge. After the bearing beam is in place, move the guide beam forward.
3. Construction of large highway viaducts in Thailand
Through long-term exhibition and detailed introduction to the construction site by slides, it is shown that the pier and abutment of the bridge are cast in site and the beam section of the bridge body is prefabricated by the factory. Its advantages are that the upper and lower structures of the bridge can be constructed in parallel, which greatly shortens the construction period, and there is no need to manufacture components at high altitude, the quality is easy to control, and it can be mass-produced in one place, which reduces the engineering cost. But the disadvantage is that it needs large hoisting and transportation equipment. Obviously, due to the longitudinal joints between components, the overall working performance of spliced components is not as good as that of cast-in-place method.