Find the maximum permissible depth ( H ) of the cut before the occurrence of heaving.

Question

To determine the elevation of a point such as B in Fig. 24 in the text, the following procedure was used: With the transit set up over a point such as A whose elevation is 128.3 ft, the height of the transverse axis above A was 4.84 ft and the vertical angle b between the horizontal line CD through the transverse axis and the line of sight to the point B was +12º 42'. Then a point such as E was marked on the ground on the line between A and B and at a horizontal distance from A equal to 50.00 ft. Finally, with the transit set up over the point E, the difference in elevation between the point A and the transverse axis F of the transit at E was found to be 3.47 ft, and the vertical angle d between the horizontal line through F and the line of sight to the point B was +18º 07'. The elevation of the point B is

Answer 1

Question

Chapter 9, Problem 9.9P

To determine

Find the maximum permissible depth (H) of the cut before the occurrence of heaving.

Expert Solution & Answer

Trending nowThis is a popular solution!

See solution

Check out sample textbook solution

Students have asked these similar questions

To determine the elevation of a point such as B in Fig. 24 in the text, the following procedure was used: With the transit set up over a point such as A whose elevation is 128.3 ft, the height of the transverse axis above A was 4.84 ft and the vertical angle b between the horizontal line CD through the transverse axis and the line of sight to the point B was +12º 42'. Then a point such as E was marked on the ground on the line between A and B and at a horizontal distance from A equal to 50.00 ft. Finally, with the transit set up over the point E, the difference in elevation between the point A and the transverse axis F of the transit at E was found to be 3.47 ft, and the vertical angle d between the horizontal line through F and the line of sight to the point B was +18º 07'. The elevation of the point B is

Which of the following statements is not true when considering precision in surveying?A. Measuring angles to the nearest minute and distances to the nearest hundredth of a foot is usually sufficient for locating theroute of a highway.B. A very accurate survey provides a very high degree of precision.C. Precision is defined as the degree of correctness applied in instruments.D. The most precise instruments can produce inaccurate results i f subjected to mechanical or human error.

Which of the following is not desirable when marking a transit point for conducting a survey?A. Embedding a nail into soft concreteB. Driving a tack flush with the top o f a wooden hubC. Chiseling a cross on an embedded rockD. Driving a nail with flagging into undisturbed earth