最新北师大版八年级数学上册第一次月考质量检测试卷(及答 案)
3页1、Chap. 4Subsurface Investigation and Characterization4.4 A two-story reinforced concrete building is to be built on a vacant parcel of land. This building will be 100 ft wide and 200 ft long. Based on information from other borings on adjacent properties, you are reasonably certain that the soils below a depth of 5 to 8 feet (1.5 to 2.5 m) are strong and relatively incompressible. However, the upper soils are questionable because several uncompacted fills have been found in the neighborhood. Not
2、only are these uncompacted fills loose, they have often contained various debris such as wood, rocks, and miscellaneous trash. However, none of these deleterious materials is present at the ground surface at this site.Plan a site investigation program for this project and present your plan in the form of written instructions to your field crew. This plan should include specific instructions regarding what to do, where to do it, and any special instructions. You should presume that the field crew
3、 is experienced in soil investigation work, but is completely unfamiliar with this site.SolutionBased on available information, the site may be underlain by 5 to 8 ft of uncompacted fill over strong soils. To investigate this site, we should do the following:1. Perform five cone penetration tests, one at the center of the site and one near each of the four comers of the site. Each CPT should reach a depth of at least 25 ft.2. Drill 10 to 15 borings, with locations spread out evenly around the si
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