Dewatering and Groundwater Control
TOC
1. INTRODUCTION
Purpose and scope
General
Construction dewatering
Permanent groundwater control
2. METHODS FOR DEWATERING, PRESSURE RELIEF, AND SEEPAGE CUTOFF
General
Types and sources of seepage
Sumps and ditches
Wellpoint systems
Vertical sand drains
Electro-osmosis
Cutoffs
Summary of groundwater control methods
Selection of dewatering system
3. GEOLOGIC, SOIL, AND GROUNDWATER INVESTIGATIONS
General
Geologic and soil conditions
Groundwater characteristics
Permeability of pervious strats
Power
Surface water
4. DESIGN OF DEWATERING, PRESSURE RELIEF, AND GROUNDWATER CONTROL SYSTEMS
Analysis of groundwater flow
Mathematical and model analysis
Flow-net analysis
Electrical analogy seepage models
Numerical analysis
Wellpoints, wells, and filters
Pumps, headers, and discharge pipes
Factors of safety
Dewatering open excavations
Dewatering shafts and tunnels
Permanent pressure relief systems
Freezing
control of surface water
5. INSTALLATION OF DEWATERING AND GROUND WATER CONTROL SYSTEMS
General
Deep-well systems
Wellpoint systems
Vertical sand drains
Cutoffs
Piezometers
6. OPERATION AND PERFORMANCE CONTROL
General
Operation
control and evaluation of performance
7. CONTRACT SPECIFICATIONS
General
Types of specifications
Data to be included in specifications
Measurement and payment
Examples of dewatering specifications
APP
A Reference and Bibiography
B Notations
C Field Pumping Tests
D Examples of design of dewatering nd pressure relief systems
E Transformation of anisotropic soil condition to isotropic soil conditions
F Examples of detailed dewatering specifications
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