Adjacent To The High-rise Buildings Covered Top-down Excavation Of Large Span,large Volume, Deep Foundation Pit Excavation And Construction Technology

In construction of large underground station in the city, surrounding structures and structure is usually caught the attention of a lot of their own safety. Project smoothly is the key to project technical scheme and implementation of the scheme. This paper mainly introduces the adjacent to the high-rise buildings cover to dig the uni-axial construction of deep foundation pit excavation of a large span, DaTiLiang, situation and structure of the construction technology, combined with the connect Hong Kong high-speed futian station construction technology of large underground station selection and implementation process, the dig uni-axial structure construction of all the mechanical characteristics of the process, the application of technique in the corresponding geological conditions were summarized characteristics and main technical points, formed a complete set of deep foundation pit cover the construction technology of inverse for long-span, improve across nearly meet the construction under the condition of the super deep and large deep foundation pit digging uni-axial construction technology level. In this paper, main work is as follows:(1) introduce engineering background and the research progress both at home and abroad, and the research results at home and abroad are reviewed, combined with the project of this paper put forward the research emphasis.(2) cover dig uni-axial load analysis method: introduce the traditional analysis methods of soil load, structure, load, and cover to dig the inverse analysis method and main points, a method of load combination depends on the load analysis to clarify the whole process of engineering with complex surroundings of underground engineering cover inverse method of implementation.(3) cover: dig uni-axial structure waterproof construction technology is introduced in engineering use a variety of waterproof material and waterproof construction measures to test and verify the results, based on engineering waterproof key engineering method for the use of waterproof materials and waterproof measures and key points.Dig uni-axial cover(4) the main technical points of the construction process, in combination with relying on the whole process of project implementation, according to different process, different conditions and different engineering node, a comprehensive summary and induction in the complicated surroundings cover dig inverse method toimplement quality control measures.(5) cover dig uni-axial safety control technology: based on engineering, paper cover dig inverse as a method to implement are included in the surrounding environment, retaining structure and the main structure, to ensure safety and quality monitoring technology system.