Study On Selection Of Supporting Structure And Construction Measures In Spring Lacustrine Sedimentary Strata

With the development of urbanization, the urban space is becoming more and more te nse, and underground space have been widely used. The scale and complexity of projects a re increasing, and these projects should be supported by more theoretical and construction technology. So underground engineering has become a hot issue and has great significance for the development of geotechnical engineering. This paper chooses Shandong Guang Jia home Co., Ltd. Guang Jia-Ming Lake deep pit engineering as the research object, and acc ording to the detailed survey report, combined with the map data, and the relevant norms o f the state and Shandong Province as the basis for similar projects.This paper introduces the Shandong Guang Jia-Ming lake of the basic general situati on of the project, and describes the geological conditions on site. The physical and mecha nical properties are obtained. On the base of above analysis, and combined with relevant n orms, analysis of various common support form, finally from characteristics, suitable for t he comprehensive consideration of the geological conditions, waterproof anti permeability and construction cost to determine the underground continuous concrete wall with steel su pport is the supporting scheme. The classical equivalent beam method is chosen to analyze supporting structure, while the Rankine method is used for soil. According to the properti es of soil, the calculation method of the soil water cost is adopted. After the calculation of earth pressure, internal force calculation, the length of the continuous wall, wall reinforce ment and so on, and determine the specific support program.Effective dewatering design of foundation pit excavation within the scope of the grou ndwater, for perched water, mainly by open ditch drainage and drainage measures, and giv e full play even wall curtain effect; for deep artesian water, the deep well point dewatering measures, were designed and 23 non complete well precipitation and according to the wat er level monitoring, timely adjustment of precipitation well open quantity. Finally, the overall stability of foundation pit, foundation pit anti uplift stability, and so on, and all meet the requirements of the specification. Which checking process with the aid of FLAC software.