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Analysis of the Impact of the Settlement of the Composite Foundation in West Jinan Railway Station of Beijing-Shanghai High-speed Railway after Pumping Water

Author: ZhuXiaoXiao
Tutor: WangLianJun
School: Beijing Jiaotong University
Course: Road and Railway Engineering
Keywords: High-speed rail Composite Foundation Pit dewatering Subgrade settlement
CLC: U213.157
Type: Master's thesis
Year: 2011
Downloads: 144
Quote: 2
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Abstract


In recent years, with the expansion of the scale excavation encountered groundwater problem is also growing more control groundwater most effective and economical way to conduct a reasonable foundation pit dewatering works precipitation burden on soil The nature of the works and the surrounding environment have a significant impact . Based foundation pit dewatering for leniency Station pile board composite foundation settlement impact theory is not yet mature , the papers through field trials , theoretical analysis and numerical calculation means , the system Jinan West Railway Station, the station house foundation pit dewatering on the Beijing-Shanghai high-speed rail subgrade settlement to explore and study , the main results are as follows : ( 1) pit precipitation in the same section of composite foundation pile length , the longer the length of the pile , the impact on the smaller , less impacted than 35mPHC pile 25mCFG pile , 25mCFG pile impact piles less than 15mCFG . Pit precipitation variable pile strengths greater than non - variable length of pile area . (2) The foundation pit dewatering have a greater impact deep subsidence of the embankment , and the the subgrade settlement over underground static water level by foundation pit dewatering obvious impact on the settlement of the reinforced area greater than the impact of the settlement of the underlying layer . ( 3) foundation pit dewatering stage reinforcement pile of soil between piles . The cross-section pile soil subsidence curve volatility , more serious pile foundation pit dewatering piercing effect . (4) the impact of the foundation pit dewatering the composite foundation depth of excess pore water pressure . The reinforcement region of excess pore water pressure suffered Pit precipitation is greater than the impact of the underlying layer region . ( 5) precipitation stops also composite foundation impact , the original settlement stabilize the foundation will produce a rebound phenomenon .

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CLC: > Transportation > Rail transport > Railway Line Project > Line constructed > Subgrade > Subgrade reinforcement and protection > Embankment construction compaction and roadbed subsidence
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