Monitor and Analysis of the Foundation Pit Combination Support of Jinan West Railway Station Ground

Abstract:

The foundation pit of Jinan West Railway Station Ground is vast in area and large in Excavating depth and closely adjacent to the high-speed railway buildings and subgrade, therefore the foundation pits deformation is strictly controlled. The foundation pit supporting design applies a comprehensive mode by combing soil nailing wall, compound soil nailing wall and bored cast-in-situ piles with anchor cables. Monitoring has been carried out on internal force of side slope and supporting structure throughout the excavation of foundation pit, so detailed monitoring data have been acquired. It has been acquired, by contrastively analyzing, that since the foundation pits displacement volume may reach about one half of the final displacement volume at the time when its excavation is completed, with a huge rate of change, supporting should be timely completed during the excavation period. Compound soil nailing wall can reduce side slopes horizontal displacement volume about 25~30% , compared with soil nailing wall, and effectively add the rigidness of side slope, however it is not very useful for settlement; We get utmost horizontal displacement volume at one third to two fifths of pile length, so it is advised to increase density and strength of anchor cables.

• Periodical: Applied Mechanics and Materials (Volumes 351-352)
• Pages: 1207-1216
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.351-352.1207
• Online since: August 2013
• Authors: Lian Xiang Li, Ming Gong, Ying Jie Zheng
• Keywords: Compound Soil Nailing Wall, Foundation Pit Monitoring, Pile-Anchor Retaining, Soil Nailing Wall

References

[1] LI Fang-cheng, HU Bin, TANG Hu-i ming, ZUO Qing-jun. Deformation monitoring and analysis for the deep foundation pit construction period of Mingdu station of Wuhan subway No. 2 line[J]. Safety and Environmental Engineering, 2010, 17(5): 113—118.

[2] YANG Jia, ZHANG Qiangyong, LIU Dejun, ZHANG Ning, DUAN Kang. Monitoring analysis and stability evaluation of deep foundation pit excavation of high structure[J]. Yangtze River, 2010, 41(14): 90—93.

[3] ZHANG Xiao-ping，HU Ming-liang，WU Qing-ling，XIE Ren-jun. Analysis of typical failure foundation pits and their warning system[J]. Chinese Journal of Geotechnical Engineering, 2006, 28(S1): 1880—1884.

[4] ZHAO Yan-rong, YUAN Bao-yuan. A method based on time series improvement method of wavelet applied to deep foundation pit monitoring[J]. Rock and Soil Mechanics, 2008, 29(12): 3381—3386.

[5] TAN Feng-yi，WANG Ren，YU Ji-ning. Informationized monitoring in process of excavation of large foundation pits[J]. Chinese Journal of Geotechnical Engineering, 2006, 28(S1): 1834—1837.

[6] WU Ming-bing, LIN Da-feng, DAI Yi-ming, YU Qiang. Design and monitoring of retaining of pits in foundation-pit[J]. Chinese Journal of Geotechnical Engineering, 2006, 28(S1): 1569— 1572.

[7] AN Guan-feng, SONG Er-xiang. The analysis of excavation monitoring for Pazhouta subway station in Guangzhou[J]. Chinese Journal of Geotechnical Engineering, 2005, 27(3): 333—337.

[8] Xu Zhonghua，Wang Weidong，Wang Jianhua. Monitoring and analysis of deep foundation pit of Shanghai Bank Buliding in soft soil ground in Shanghai[J]. Chinese Journal of Rock Mechanics and Engineering. , 2004, 23(S1): 4639—4644.

[9] AN Guan-feng，GAO Jun-yue. Comprehensive analysis of deep foundation pits for underground space in Guangzhou[J]. Chinese Journal of Geotechnical Engineering, 2007, 29(6) : 872—879.

[10] AN Guan-feng, SONG Er-xiang, GAO Jun-yue. Foundation pit supporting design and supervision of Xiaoguweidao metro station in Guangzhou[J]. Rock and Soil Mechanics, 2006, 27(2): 317—322.