Study On The Application Of Pile-anchor Joint Supporting Technique In HeFei Weilan Business Port In Deep Foundation Pit

Over the years, people summarize a variety of deep Foundation pit supporting technology. However, the traditional soil-nailing wall, retaining pile technology because of the need of low strength, large deformation and other reasons have been unable to meet today’s deep foundation pit; the diaphragm-wall, inside supporting technology is very difficult to construct in the high-rise buildings in the city, and the cost is very high; and Emerging theory of freezing, SAC anchor technology is immature, difficult to Hefei universal.Practice has proved that retaining piles of pile-anchor joint supporting technique can be perfectly solved the above problem, with high strength, low distortion, low cost, simple and easy construction of the effect and characteristics, it is suitable for all kinds of deep Foundation pit supporting in Hefei area. Pile-anchor joint supporting technique is a combination of cantilever piles and prestressed anchor support technology for compound, along with their advantages, avoiding their disadvantages. Based on instances of the typical deep Foundation pit support of the high cohesive force clay in Hefei in article, limit equilibrium method using earth pressure theory and completed the preliminary design of Foundation pit support, through the site about the technology of the main construction technology and points, research Foundation the displacement data, and use FLAC 3D to simulate the stress distribution of Foundation pit in order to clear the working principle of this technology. And on this basis, explains the reason for the choice of the foundation pit supporting scheme. Article also lists a number of lessons of deep Foundation pit support in Hefei, to further explore the essentials of technical, guiding construction is feasible.