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When precipitation caisson construction and dynamic analysis of groundwater impact study on the river bank

Author: ChenZuoFen
Tutor: HongJiaBao
School: Yangzhou University
Course: Structural Engineering
Keywords: Open caisson Construction of precipitation Numerical Simulation GMS Seepage Ground subsidence
CLC: P641.2
Type: Master's thesis
Year: 2008
Downloads: 204
Quote: 3
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Abstract


In this paper, Taizhou Yangtze River Bridge north anchorage ( caisson ) surrounding the study area , with the GMS groundwater modeling software to simulate groundwater flow forecast north anchorage construction period water inflow and groundwater dynamics, and evaluation based on forecast results Dyke seepage stability, stability against sliding and ground subsidence . In the collection and analysis of the study area topography, geological structure, hydrogeological conditions , based on the systematic exposition of the major lithological analyzes of groundwater occurrence conditions and distribution as well as groundwater recharge , runoff, excretion patterns and groundwater dynamics . On this basis , the study area to determine the scope and purpose of calculating layer , no hydraulic characteristics of the aquifer , vertical and lateral boundary , according to the hydrogeological conceptual model of the groundwater model . By a mathematical model , using GMS software, according to the existing borehole data , boundary conditions and a variety of sources and sinks , using the grid method combined with the conceptual model to model fitting various parameters identified by the model , and to identify the models were tested . Test results show that : the establishment of a three-dimensional model reflects the essential characteristics of groundwater systems , groundwater level dynamic reproduction , migration law for caisson construction groundwater water inflow forecasting, water level forecasting, land subsidence control provides a scientific basis. Dyke seepage deformation is caused by precipitation during the construction period the main danger . Research Dyke penetration deformation Dyke for a reasonable assessment of security, infiltration and sabotage predict the occurrence of the form as well as the specific location on the river bank rescue and reinforcement of scientific guidance , have important theoretical and practical significance. Based on the model forecasts water levels, choose three Dyke typical cross-section for the numerical simulation of seepage , seepage stability and determination Dyke slope stability . Construction of precipitation caused by ground subsidence is another geological phenomenon . Ground subsidence is assumed soil pore water pressure and pore water borne soil skeleton effective stress change results. In this paper, the nonlinear elasticity theory and Biot's consolidation Duncan plane finite element program (BCF95), ground subsidence model established in the study area , and precipitation during caisson construction subsidence caused by the river bank were predicted .

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CLC: > Astronomy,Earth Sciences > Geology > Hydrogeology and Engineering Geology > Hydrogeology (groundwater hydrology ) > Groundwater Dynamics
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