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Research on Application of Two Different Lengths of PVDs in Vacuum Preloading Method

Author: ChenShaoQing
Tutor: ZhuPing
School: Tianjin University
Course: Geotechnical Engineering
Keywords: Vacuum preloading The length of the vertical drain Bearing capacity of foundation Degree of consolidation Construction Monitoring Settlement after
CLC: TU472.33
Type: Master's thesis
Year: 2010
Downloads: 52
Quote: 0
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Abstract


Weak clay layer, the soil has a high water content, poor permeability, compressibility and strength and low marine deposits are widely distributed in China's coastal regions and all major rivers into the sea Delta alluvial plain areas, lake sediments and river sediments. In recent years, as the economic and social development, engineering, construction land is increasingly tense, more and more buildings will be built on this soft ground, and to promote the development of the soft ground processing theory research and engineering practice, including vacuum drainage preloading pressure method is a relatively mature soft ground treatment methods, and achieved good economic and social benefits. The land department is located in Tianjin Binhai New Area of ??Tianjin Port Reclamation from the typical soft land area, the adverse impact to the design and construction of various buildings of the port. Countries have made it clear to the development and opening of Tianjin Binhai New Area into the overall development strategy of Tianjin Port is an important part of the Binhai New Area, creating a rare historical opportunity for the development and opening of Binhai New Area of ??Tianjin Port. How to optimize the reinforcement of existing soft ground treatment methods, to shorten the construction period for port construction, cost savings become an important research topic of concern. This article summarizes in a review the the the vacuum preloading technology development on the basis of history and Research, combined with the key project of Tianjin Tianjin Dongjiang Bonded Port Bonded Warehouse Battle 200 million square meters of soft ground treatment works \fight to set the depth of research, optimization of design and construction for the future soft ground reinforcement program to provide guidance recommended. The main contents are as follows: (1) a brief description of the the Tianjin Binhai geological conditions and applicable foundation treatment methods, recalled vacuum preloading method in the history of the development of a large area of ??deep soft ground and Research. (2) describes the vacuum preloading construction process, as well as on-site monitoring of the basic points, based on the use of the bearing capacity and deformation requirements to determine the vertical drain driven depth, and in the actual project set two different vertical drainage body set up to fight a depth of The the contrast vertical drainage body set up to fight different depth layers of the soil settlement, pore water pressure dissipation, etc., indoor and field tests of the soil before and after reinforcement, compared to the change of the physical and mechanical properties depth of vertical drainage body to determine the best set up to fight. (3) describes the basic foundation settlement calculation method proposed measured settlement curve to project the final settlement of more practical significance, and the final settlement of the soil, respectively, using the three-point method, hyperbolic and exponential law projections presented in The vacuum preloading law handle soft ground using the hyperbolic method to project more suitable. (4) stressed the importance of settlement after the control soil work, and from the angle control workers after settlement of existing vacuum preloading method to uninstall reasonable standard recommendations.

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CLC: > Industrial Technology > Building Science > Soil mechanics,foundation engineering > Foundation > Artificial foundation reinforcement > Shallow and deep mechanical reinforcement ( compaction ) > Preload ( sand wells, heap load )
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