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Work Mechanism and Design Theory Research of DJM Pile Composite Foundation in Freeway

Author: ZhangHao
Tutor: ZhaoMingHua；WanJianPing
School: Hunan University
Course: Geotechnical Engineering
Keywords: Composite Foundation DJM Carrying capacity Settlement calculation Applied Research
CLC: U416.1
Type: Master's thesis
Year: 2009
Downloads: 125
Quote: 1
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Abstract


With the rapid development of civil engineering construction , soil piles composite foundation technology has been widely used in soft ground handling . However, due to the complexity of the geological conditions and soil piles composite foundation problems its understanding is still in the discussion and study , and soil piles composite foundation is mainly concentrated in Shanghai , Jiangsu , Zhejiang , Guangdong , Fujian , Hunan , Hubei etc. the soft land area of the province , in the area of the Yellow River alluvial applications such as the Shandong region less, so the lack of appropriate design and construction experience . Therefore , this paper intends to start from the two aspects of the theoretical analysis and engineering tests , the Yellow River alluvial valley soil piles composite foundation design calculation theory , construction and quality testing fully explored . Firstly, the use of dissolution - precipitation theory analysis of DJM pile essentially , and thus carried out a comprehensive analysis of the bearing mechanism of DJM Composite Foundation ; then DJM plane axisymmetric problem of the role of soil as to take advantage of the cavity expansion theory , and consider expansion affect the size of the radius of the two cases were calculated conductivity had pILES ENGINEERING AND FOUNDATION , and on this basis the impact DJM composite the foundation vertical bearing capacity of the main factors in-depth analysis . Then , the whole process of the soil piles composite foundation design calculations , including settlement and stability calculations , and to introduce the idea of combination forecasting based on several common \kinds of variable weight combination forecasting methods, the guide had to predict the variable weight combination the DJM pile of soft soil roadbed at any one time settlement value \Finally , based on the theoretical analysis process for the engineering characteristics of the Shandong Yellow River alluvial areas , combined with the Tianjin -Shantou Expressway soft subgrade engineering practice , in-depth study on DJM pile composite foundation of design , construction and quality control methods , according to the project practice effect , proposed the construction technology and construction process of a of DJM composite foundation for the region of the Yellow River alluvial basin , similar projects for reference .

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CLC: > Transportation > Road transport > Road works > Roadbed, pavement engineering > Subgrade
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