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A Description Of Site Analysis Project

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3.1 Introduction The main objective of this research is to compare predicted pile capacity results with load test results by using cone penetration test data, and involve to the characterization of soil for design of driven piles. Thus, site description is necessary to compute predicted pile capacity. The information of soil was determinant factor on predicted axial pile capacity for two bridge projects (Route WW and Route U) in New Madrid, MO. The location of two bridge projects and description of soil characterization (site description) are investigated in this chapter.
3.2 Project Overview and Location This research has two project sites, which are Route WW (Structure No. A2141) and Route U (Structure No. A8414). The project of …show more content…

Table 3-1 Soil description depends on the borehole information of CPT and SPT for Route WW (Fennessey T. W. 2016).
Layer Range Depth (feet) Description
1 0 - 14 Stiff Clay
2 14 - 24 Silt
3 24 - 34 Sand
4 34 - 76.2 Soft Clay
5 76.2 - 106.5 Sand

Table 3-2 Soil description depends on the borehole information of CPT and SPT for Route U (Hilchen P. 2016).
Layer Range Depth (feet) Description
1 0 – 5.9 Fat Clay
2 5.9 – 66.5 Gray Sand

3.4 Available Information A Standard Penetration Test information (SPT) and a Cone Penetration Test data were available for both bridges. The value of N60 ranges from 5 to 63 and this value depend on the characterization of soil and the depth of tests (Table 3-3 and 3-4). Also, the site pile plan is shown in Figure 3.1 and 3.2 for each the project of bridge.
Table 3.3 Soil Description and CPT data for the Site of Route WW (Water level is shown at 13 feet).
Layer Depth (ft) Description Total Unit Weight (pcf) Internal Friction Angle Blow Counts (N60)
1 0 - 8 Soft Clay 111 16 5
2 8 - 21 Sand 121 38 16
3 21 - 26 Sand 124 42 39
4 26 - 32 Sand 121 34 11
5 32 - 49.1 Sand 127 43 53
6 49.1 Bottom 124 42 41

Table 3.4 Soil Description and CPT data for the Site of Route U (Water level is shown at 19 feet).
Layer Depth (ft) Description Total Unit Weight (pcf) Internal Friction Angle Blow Counts (N60)
1 0 - 8 Soft Clay 111 16 5
2 8 - 21 Sand 121 38 16
3 21 - 26 Sand 124 42 39
4 26 - 32 Sand 121 34 11
5 32 - 49.1 Sand

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