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Research on Deformation Field of Dynamic Consolidation with Drain Pile in Saturated Saline Soil Region

Author: LuKeYu
Tutor: YangJun
School: China Academy of Building Research Institute
Course: Geotechnical Engineering
Keywords: Of Dynamic Compaction Add drainage pile method (DPD) Situ deformation field test Kriging Deformation energy
CLC: TU473.1
Type: Master's thesis
Year: 2009
Downloads: 75
Quote: 0
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Abstract


Qaidam Basin in Qinghai widely distributed alluvial lacustrine saline soil , type of soil generally has a high water content , strong corrosion , low-intensity , low- permeability characteristics . Traditional gravel pile foundation treatment technology is difficult to meet the requirements of various construction development in Salt Lake . For this saturated salted land -based , dynamic compaction plus drainage Piles (DPD law ) is the foundation of an effective treatment method . DPD dynamic compaction method influenced by many factors , the mechanism is very complex , DPD research group design with and without drainage pile situ deformation field trials , and conduct research on the Dynamic Consolidation the scope and impact depth . Based on the in situ dynamic compaction deformation field comparison test , research and analysis of the raw data by Kriging interpolation method . The results show that : dynamic compaction deformation field in the original data after the normal conversion Kriging . Kriging contour map of the deformation field : without drainage the pile dynamic compaction area rammer vertical displacement under the hammer first strike to increase in the fourth hit fifth hit the sixth strike increase is obvious; side there has been a wide range of uplift , tamping main reason for the failure is the lack of effective soil drainage channel ; pile dynamic compaction zone plus drainage drainage effect is significant , did not form a significant uplift area , the first strike to the fifth strike is reinforced topsoil , the sixth hit to the tenth strike mainly to reinforce the deep soil . Variable penetration the elastic coefficient skeleton unit body deformation energy mathematical model and applying the model of the Kriging deformation field grid data analysis , analysis results show that : the model of deformation energy statistics deformation field parameters tamping process the changes obvious correlation . By deformation parameters compared each hit , get the the best compacting numbers corresponding tamping affect depth . In this paper, the preparation of the Kriging procedures applicable to the dynamic compaction deformation field , able to draw out the deformation field approximation graphics .

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CLC: > Industrial Technology > Building Science > Soil mechanics,foundation engineering > Foundation > Pile foundation and deep foundation > Pile
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