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Filed Research on Settlement Characters and Construction Technology of Ram-Compaction Piles with Composite Bearing Base in High-Speed Railway

Author: LuoHao
Tutor: MaJianLin
School: Southwest Jiaotong University
Course: Geotechnical Engineering
Keywords: Carrier pile High-speed rail Construction technology Finite Element Settlement
CLC: U213.15
Type: Master's thesis
Year: 2010
Downloads: 30
Quote: 1
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Abstract


Carrier pile composite foundation developed in the 1990s , a new foundation reinforcement technology has been widely used in building foundations processing , due to its good economic and applicability , railway recent began. Both differ materially First, the railway roadbed traditionally been considered to be a flexible foundation , the building is based on the typical rigid foundation ; Secondly , the building load for static load , railway foundation to withstand dynamic loads ; , high-speed railway The ballastless track subgrade settlement after requirements are generally not more than 15mm, the standard is much higher than the building foundation . Properties of composite foundation under rigid foundation has some theory and methods , and the analysis of composite foundation under flexible foundation in the theory and methods are not mature . Expand the theory of the formation of the head by the the finishing the carrier pile composite foundation theoretical results , the carrier pile , the effective diameter of the formula , carrier pile composite foundation bearing capacity calculation and settlement calculations are summarized summarized and improve the theoretical study of carrier pile composite foundation pile composite foundation in order to better guide the carrier design . Download body pile composite foundation site engineering test , analysis of various observational data hooded carrier pile composite foundation reinforcement in the railway roadbed flexible foundation under the pile composite foundation raft structure and no pile cap carrier through a flexible foundation for high-speed rail area and deformation characteristics of the underlying layer , validate and enrich the current carrier pile composite foundation theory . Pile composite foundation to better guide the carrier through the site to record and finishing the carrier pile composite foundation construction technology in the high-speed railway roadbed engineering , construction points of the carrier pile construction process and problems summarized in a future railway projects application . PLAXIS finite element software to simulate the carrier pile composite ground . Confirmed by comparison with field data , the accuracy and reasonableness of the numerical simulation . On this basis , the composite foundation settlement law analysis and comparative analysis on the stress distribution in the the pile soil with the top of the pile and the settlement , reveals its mechanism of action , comparative analysis of its effects .

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CLC: > Transportation > Rail transport > Railway Line Project > Line constructed > Subgrade > Subgrade reinforcement and protection
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