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Predicting Potential Heave and Heave with Time in Swelling Foundation Soils

Predicting Potential Heave and Heave with Time in Swelling Foundation Soils
Author: Lawrence D. Johnson
Publisher:
Total Pages: 78
Release: 1978
Genre: Foundations
ISBN:

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THIS STUDY EVALUATES PROCEDURES FOR PREDICTING ONE-DIMENSIONAL POTENTIAL HEAVE OF FOUNDATION SOILS AND THE RATE AT WHICH HEAVE MAY OCCUR. A computer program ULTRAT (Ultimate and rate of heave) was developed for predictions of potential heave and heave with time based on two models for characterization of swell behavior: the soil suction and mechanical swell models. The soil suction model relates volume change with change in matrix soil suction and water content.


Prediction of Potential Heave of Swelling Soil

Prediction of Potential Heave of Swelling Soil
Author: LD. Johnson
Publisher:
Total Pages: 8
Release: 1978
Genre: Capillary pressures
ISBN:

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Methods of characterizing swell behavior and predicting total potential heave of foundation soils were compared with field measurements for three test sections. The methods used included nine empirical procedures, three types of consolidometer tests, and a thermocouple psychrometric soil suction method. It was found that simple classification tests can provide reasonable estimates of field heaves. Predictions of potential heave using the consolidometer were sometimes low and may often represent minimal heaves when compared to field observations. Predictions based on the soil suction method provided reasonable upper limits for all test sites.


Properties of Expansive Clay Soils

Properties of Expansive Clay Soils
Author: Lawrence D. Johnson
Publisher:
Total Pages: 29
Release: 1975
Genre: Clay
ISBN:

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A relatively economical and expedient numerical procedure and computer code based on the finite difference method were developed for predicting heave with time for heterogeneous expansive soils beneath structures idealized as two-dimensional. The computer code will also compute the potential heave assuming saturation of the foundation soils based on McDowell's swell data. The heave with time estimates should be useful for structures near which penetration of rainwater from the ground surface is permitted, provided that ponding of surface water and external water from leaking water and sewer lines does not occur. The potential heave should be useful if the foundation soils become saturated from excessive watering, poor surface drainage, and leaking water and sewer lines. The required input data include the structural load, specific gravity, liquid and plastic limits, initial dry density and water content, coefficient of vertical permeability, ratio of the horizontal to the vertical coefficient of permeability, and swell and suction relationships of the foundation soils.


Foundation Engineering for Expansive Soils

Foundation Engineering for Expansive Soils
Author: John D. Nelson
Publisher: John Wiley & Sons
Total Pages: 416
Release: 2015-02-10
Genre: Technology & Engineering
ISBN: 1118415299

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Your guide to the design and construction of foundations on expansive soils Foundation Engineering for Expansive Soils fills a significant gap in the current literature by presenting coverage of the design and construction of foundations for expansive soils. Written by an expert author team with nearly 70 years of combined industry experience, this important new work is the only modern guide to the subject, describing proven methods for identifying and analyzing expansive soils and developing foundation designs appropriate for specific locations. Expansive soils are found worldwide and are the leading cause of damage to structural roads. The primary problem that arises with regard to expansive soils is that deformations are significantly greater than in non-expansive soils and the size and direction of the deformations are difficult to predict. Now, Foundation Engineering for Expansive Soils gives engineers and contractors coverage of this subject from a design perspective, rather than a theoretical one. Plus, they'll have access to case studies covering the design and construction of foundations on expansive salts from both commercial and residential projects. Provides a succinct introduction to the basics of expansive soils and their threats Includes information on both shallow and deep foundation design Profiles soil remediation techniques, backed-up with numerous case studies Covers the most commonly used laboratory tests and site investigation techniques used for establishing the physical properties of expansive soils If you're a practicing civil engineer, geotechnical engineer or contractor, geologist, structural engineer, or an upper-level undergraduate or graduate student of one of these disciplines, Foundation Engineering for Expansive Soils is a must-have addition to your library of resources.


Technical Report S.

Technical Report S.
Author:
Publisher:
Total Pages: 722
Release: 1968
Genre: Pavements
ISBN:

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