Download e-book for iPad: Ground Control and Improvement by Petros P. Xanthakos

By Petros P. Xanthakos

ISBN-10: 0471552313

ISBN-13: 9780471552314

A complete compilation fascinated about a number of glossy equipment getting used around the world to enhance soil and rock stipulations assisting new and remedial development. floor water reducing and drainage innovations, soil compaction, excavation help equipment, permeation and jet grouting are one of several subject matters mentioned. greater than a hundred tables and 650 figures illustrate the textual content.

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Download e-book for iPad: Ground Control and Improvement by Petros P. Xanthakos

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One very important but elusive parameter for sizing pumps and discharge pipes is the magnitude of inflow expected. Since inflow often cannot be predicted with a high degree of certainty, it is usually estimated on the high side so that excess capacity is built into the system within practical limits. Weeps and Horizontal Drains Weeps are a very common way of relieving water pressure behind retaining walls. They usually consist of short holes or pipes through the wall with a pervious granular filter and geosynthetic filter material to prevent the migration and loss of fine-grained soil material (Figure 1-38).

Bituminws GroutsBetoniteChromeLigninSilicates. Juasten Colloidal Solutions - not required Figure 1-14 Treatment methods according to grain size. 01 0. 1-3 INVESTIGATION METHODS 17 Required: Permeability values for the five soil samples. 1 X 10' D,,SIZE (mm) Permeability Tests A more accurate method of determining soil permeability is by conducting laboratory permeability tests on representative samples obtained from the boring program. A device called a permeameter is used for testing (ASTM, 1990).

One common characteristic of soils that relates to dewatering is the grain size distribution. For some soils this is a reliable predictor of permeability. Sometimes laboratory and field tests are run to estimate the permeability of the soil and rock. Finally, the most reliable, and unfortunately the most costly, test method for dewatering programs is a full-scale field pump test. On large projects, field pump tests are usually cost effective. , 1974; Sowers, 1979; Hunt, 1984) discuss the wide variety of geotechnical investigative methods available.

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Ground Control and Improvement by Petros P. Xanthakos


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