The Testing Study On Urban Underground Space Opens To Excavate To Environment

With the development of economy and improvement of urbanization level, the contradiction between the development of urbanization and the absence of land resources is even stand out, so it is inevitable to utilize the urban underground space for the sustainable development of city. As utilization of urban underground space is still in the initial phase at present, the practice of utilization of urban underground space is more advanced than the theory research. Because of complexity of underground soil and diversity of retaining model of utilization of urban underground space, the main control factor of environment in the influence of underground excavation and main control of the deformation feature of retaining structure in the influence of underground excavation are still to be further research. In this paper, the urban underground space excavation engineering of GuangZhou City is introduced, in order to discuss the environment influence of underground excavation. At the same time, according to lots of research results of field measurement, the force-deformation mechanism of different retaining model and the regulation of environment influence under different working condition during excavation and utilization of urban underground space are discussed in detail. And these results in this paper can help the development of urban underground space excavation.The paper comprises mainly two parts:The first part: the study on practice and testing of excavation engineering.1. Firstly, the paper introduces the monitoring technology and progress of excavation engineering. Then, through the summary of tens of monitoring achievement of excavation engineering, the author obtains the deformation regulation of the five types of typical excavation engineering bracing construction. The axial force of inside bracing regulation or anchoring force of anchor, internal force of soil nailing and surrounding construction deformation regulation of them are also achieved. The five types of typical excavation engineering bracing construction are separately...