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Data scientists often develop data sets for analysis by drawing upon available data sources. A major challenge is ensuring that the data set used for analysis adequately represents relevant demographic groups or other variables. Whether data is obtained from an experiment or a data provider, a single data source may not meet the desired distributio...
DOI:https://doi.org/10.1103/PhysRevD.106.119901
Citations
... He et al. [96], Zhao et al. [97], and Han et al. [98] found that double-row pile supporting structures can give better play to their overall rigidity characteristics and have a better deformation control effect than single-row pile supporting structures through comparative analysis. Based on the excavation project of the square in front of Huaian East Station, Zhou et al. [99] selected different excavation sequences for different pit locations and found that the excavation sequence from far to near could reduce the surface settlement and reduce the deformation of the foundation pit supporting and retaining structure. ...
The conventional support forms of foundation pit retaining piles include single-row piles, double-row piles, anchor-row piles, and so on. The double-row pile supporting structure is widely used in the deep foundation pit supporting the engineering of wharves, bridges, subways, tunnels, and high-rise and super-high-rise buildings. This study on double-row pile supporting structures mainly focuses on four aspects: (1) The influence of dimension parameters, such as pile diameter and pile length, and engineering parameters, such as pile spacing and row spacing, on the deformation control of a double-row pile structure and the stability control of foundation pits; (2) Influence of the soil arch effect on the stress and deformation of the double-row pile supporting structure; (3) Study on the deformation characteristics and rules of the components and the whole structure of the double-row pile supporting structure; (4) Study on the calculation model of pile-soil interactions. Based on the above four aspects, this paper summarizes the latest research status of the existing double-row pile supporting structure and its stress and deformation characteristics. The deformation characteristics and calculation model of the pile-soil interaction of double-row piles are reviewed and evaluated. Finally, the problems and deficiencies in the research on double-row pile support are summarized. These results provide a reference for future research on the double-row pile supporting structure of the foundation pit and the numerical analysis and calculation model and lay a solid foundation for further development of the theory.
... Many researchers have carried out a series of studies on the foundation pit supporting structure system. Chen et al. [1][2][3][4][5][6][7][8][9][10][11][12][13] studied the synergy and deformation law of deep foundation pit supporting structures under different working conditions by combining numerical simulation and field monitoring. Kang et al. [14][15][16][17][18][19] established a simulation model considering the coupling of the stress field and seepage field and put forward the effect of confined water level change on the stability of the foundation pit support structure. ...
Relying on a deep foundation pit project in Beijing, using FLAC3D three-dimensional finite-difference software simulation combined with displacement monitoring data verification method, the deep foundation pit excavation and three-pile and two-anchor rod support system in anhydrous sand pebble stratum are systematically analyzed, and summed up the variation law of formation stress, internal force of soil nail, axial force of bolt, stress and displacement of pile in the process of excavation and support of deep foundation pit. The results show that during the excavation of the foundation pit, the maximum horizontal displacement of the sidewall is not at the top of the pile and the top of the slope but at a certain distance below the top of the pile. The axial force of the anchor rod is unevenly distributed along the length direction, the axial force of the free section is equal, the axial force of the anchoring section decreases in turn, and the prestress of the anchor rod spreads to the anchoring section after tensioning and locking. The soil-nailed wall is a passive force-bearing system, the force is small during the excavation and support process, and the axial force distribution along the length direction is large in the middle and small at the two ends. By analyzing the variation law of stress and deformation, the timeliness of the data in the construction process is improved, and an effective and reasonable case reference is provided for the informatization construction of simulated relevant working conditions.
