Asian Financial Building Foundation Investigation And Support Design Of Foundation Pits In Shenyang

With the continuous development of Chinese economy, infrastructure construction and various modernized industrial architecture set up ceaselessly. The foundation pit excavation depth is bigger and bigger.It is important for us to investgate geotechnical engineering whose quality plays an important role on the project construction.Foundation pit engineering is rich in content and changeable in the underground foundation construction .Especially in recent years, with the appearance of more and more deep foundation pits, we combine this subject with the software simulation.Shenyang Asian financial building project as an example, The essay gives an brief description of the project location, topography, weather conditions and the regional geological conditions. According to space condition and the project general situation, this project's geotechnical engineering investigation is fixed for the first rate; under investigation and the detailed work of identified core mission of this survey, we made a specific survey design; based on "geotechnical Engineering Investigation norms" and the relevant provisions of the experience of survey work areas for specific arranged to determine the scope of investigation, exploration point layout, hole depth and other field parameters, workload statistics presented by the demand for equipment and program duration to inspect the construction for the proposed practical and reasonable solution. And survey and design of the project was streamlined discussed.Through the survey field data and laboratory test data ,we analyze and evaluate the foundation soil suitability and reliability . The flat terrain survey, the depth of exploration for the fourth major reservoirs in the mainland is a new series of new DuiJiCeng artificially, 4 series HunHe high floodplains and ancient river alluvial soil. Space stabilizes can carry out engineering construction. Seismic resistance fortifies intensity is 7 degree, g designing that fundamental earthquake acceleration is worth for 0.10, space characteristic period Tg is 0.35 s. Construction site classification as ClassⅡ, belong to the construction of the general venue. Standard depth of freezing is1.20m, the maximum freeze depth is 1.48m. Groundwater types of the Quaternary unconsolidated rock pore diving, stable water level depth is14.20 ~ 15.20m, equivalent to assume that this elevation 29.69 ~ 30.77m. Alternating wet and dry conditions in the groundwater or long-term immersion conditions are corrosive to concrete micro-structure of steel reinforced concrete structure with micro-corrosion. Get in line with the actual situation of the site geotechnical parameters of the basic design calculations.Based on the survey design analysis, we proposed to take the pile anchor foundation combined support of the support method for the specific circumstances of the Asian financial buildings,that is "the upper part of the masonry walls, filling the lower part of bored piles pressure plus 1 - 3 row bolt combined support, "the foundation pit design.The implementation of foundation pit will block, to determine the number of each row and the supporting height and Angle, and puts forward the measures of foundation pit, anti-uplift design precipitation and deformation monitoring three specific requirements. We use "Li Zheng" foundation pit supporting structure design software toanalyze supporting excavation wall displacement and the stability of the simulation.Taking"North side of the road nine (AB section) pit" as the example, excavation of the whole process will be divided into five working conditions.Working conditions were analyzed under the pit wall stress and displacement changes, and then draw the excavation of the whole process of stress-strain diagram and the envelope surface subsidence map, analyze the total stress and maximum displacement. Pit wall deformation of a maximum of 18.51mm, the maximum surface subsidence control in 48mm or less. And we finally use the slice method for checking the overall stability against sliding and overturning stability checking, the overall sliding stability safety factor Ks = 1.480, anti-overturning safety factor Ks = 2.019≥1.200, are able to meet regulatory requirements. Through the above analysis and simulation of engineering measures to make reasonable suggestions, and then guide the design, construction, post-project monitoring and protection, etc., to ensure their safety, the construction has a strong practical significance.