Determine the preliminary nail length and maximum design nail tensile force to satisfy the global stability.

 

A hollow bar soil nail wall is used as a temporary soil retention struc-

ture. The retained soil and its properties are shown in Figure 7.61. The

following design parameters are also selected for this project:

Pullout factor of safety, FSp = 2.0

Global factor of safety, FSG = 1.4

Nail horizontal spacing, SH = 1.5 m

Nail vertical spacing, SV = 1.5 m

Nail inclination = 15 degrees

Drillhole diameter, DDH = 200 mm

Ultimate pullout resistance, qu = 120 kN∕m²

Determine:

(1) The preliminary nail length and maximum design nail tensile force

to satisfy the global stability.

(2) The factor of safety against sliding.

 

(3) The factor of safety against the heaving of the foundation soil.

 

 

 

 

find the cost of your paper

Explain why attenuation is not a big problem in PET.

Consider a 2-D object consisting of two triangle compartments, as shown in Figure P9.4. Suppose a solution containing a 511 KeV gamma ray emitting radionuclide with concentration f = 0.5….

Give the mean and the variance of the reconstructed image, mean[ˆ f(x, y)] and var[ˆ f(x, y)].

Ignoring the inverse square law and attenuation, an approximate reconstruction for SPECT imaging is given by where c˜() =  {||W()} and W() is a rectangular windowing filter that cuts off at = 0…..

Find the numerical responses in each to an event in crystal C(4, 6).

Suppose a PET detector comprises four square PMTs (arranged as a 2 by 2 matrix) and a single BGO crystal with slits made in such a way that it is….