Prefi Terms

Question 1

The scope of the site investigation for geotechnical earthquake engineering is usually divided into two parts:

Answer 1

(1) Screening Investigation, and (2) Quantitative Evaluation of the seismic hazards

Question 2

The purpose of the screening investigation is to

Answer 2

assess the severity of the seismic hazards at the site

Question 3

The first step in the screening investigation is to review available documents, such as the following:

Answer 3

Preliminary design information, History of prior site development, Seismic history of the area, Aerial photographs and geologic maps, Special Study Maps, Topographic Maps, Building Codes or other Regulatory Specifications

Question 4

done after the site research to observe the site conditions and document any recent changes to the site that may not be reflected in the available documents

Answer 4

Field reconnaissance

Question 5

should also be used to observe surface features and other details that may not be readily evident from the available documents

Answer 5

Field reconnaissance

Question 6

Once the site research and field reconnaissance are completed, the engineering geologist and geotechnical engineer can then complete the screening investigation. The results should either clearly demonstrate the lack of seismic hazards or indicate the possibility of seismic hazards, in which case a _____ is required.

Answer 6

quantitative evaluation

Question 7

The purpose of the quantitative evaluation is to obtain sufficient information on the nature and severity of the seismic hazards so that _____ can be developed.

Answer 7

mitigation recommendations

Question 8

The quantitative evaluation consists of the following:

Answer 8

Geologic Mapping, Subsurface Exploration, Laboratory Testing, Engineering and Geologic Analyses, Report Preparation

Question 9

The most important part of the subsurface exploration typically consists of the

Answer 9

excavation of borings, test pits, and trenches

Question 10

The required number and spacing of borings, test pits, and trenches for a particular project must be based on

Answer 10

judgment and experience

Question 11

To study the potential seismic hazards of a soil deposit, the ideal situation would be to obtain an ___, apply the same stress conditions that exist in the field, and then subject the soil specimen to the _____. The resulting soil behavior could then be used to evaluate the ____. The disadvantages of this approach (___) are that ___ would be required. Usually in engineering practice, this approach is ___, and other options are used.

Answer 11

undisturbed soil specimen, anticipated earthquake-induced cyclic shear stress, seismic hazards, soil sampling, undisturbed soil specimens and sophisticated laboratory equipment, not practical or is too expensive