Decision Support System Of Underground Construction Based On Adjacent Buildings Safety

City tunnel excavation will inevitably disturb to surrounding soils, and then to adjacent buildings, the serious influence may endanger the safety of the building. With the development of economy and the improvement of urbanization, the surface buildings become more and more dense, the contradiction between tunnel excavation and surface buildings become serious increasingly. Therefore, studying the influence of surface movement and deformation, which caused by city tunnel excavation, to adjacent buildings, evaluating damage degree of buildings, putting forward the corresponding defensive measure aimed at damage buildings have a very important significance to ensure the safety and normal use of building and excavation soothingly of tunnel engineering. In order to solve this problem, in this paper we build an decision support system of underground engineering construction based on adjacent building safety, and this system is based on the regional geological environment of Qingdao and take buildings near Jiao Zhou Bay sub sea tunnel Qingdao terminated line for prototype connection.There are the following aspects specifically:(1) Some problems are analyzed theoretically, they are rock stress and displacement caused by underground excavation, ground subsidence caused by rock stress and displacement and response of buildings caused by subsidence, other problems are making a brief description, they are the classic methods of solving rock stress and displacement and peck formula. Aimed at ground subsidence caused by rock stress and displacement, we take a tunnel excavation for example to do a numerical simulation using ANSYS.(2) Making a detailed description of the spatial decision support system about its basic definitions and characteristics, and giving the basic structural framework of spatial decision support system. Analysis the composition and set up process and functions of two major modules - the database management system and model base management system in spatial decision support system subsystem, giving a detailed description of AHP in method base management sub system.(3) Overall planning and constructing a decision support system platform, this platform is based on ArcGIS, combining with Access database, and making full use of VB programming language powerful ability to conduct secondary development of the system, in the end writing two modules which are analysis evaluation module and protection decision-making module.(4) Combining with the engineering of Jiao Zhou Bay sub sea tunnel Qingdao terminated integration of terminals, taking Qingdao Unique geological conditions which are hard rock inclusion of crushing and fault as background, we built"an decision support system of underground engineering construction based on adjacent building safety", based on the basic framework we extensive database of actual project information and describe key techniques in detail, and finally take a specific building for example to analyze achieve results of decision support system, in this way, to further demonstrate the feasibility of the system.