Question: An arched tunnel is driven in moderately blocky and seamy, wet ground at a depth of 863 m where rock properties are, Co = 98.6

An arched tunnel is driven in moderately blocky and seamy, wet ground at a depth of 863 m where rock properties are, Co = 98.6 MPa, To = 9.86 MPa, E = 29.3GPa, G = 12.4GPa, γ = 24.7kN/m3. The tunnel is 4.3 m wide by 5.2 m high; the back arch is semi-circular. Specify a suitable steel set size (web depth, flange width, weight per foot), set spacing and maximum blocking point spacing for these conditions.

Step by Step Solution

★★★★★

3.45 Rating (164 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

Given An arched back tunnel where depth 863 m Co 986 ... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Document Format (1 attachment)

26-E-G-R (194).docx

120 KBs Word File

Students Have Also Explored These Related Geological Engineering Questions!

The absolute pressure in water at a depth of 9 m is read to be 185 kPa. Determine (a) The local atmospheric pressure, and (b) The absolute pressure at a depth of 5 m in a liquid whose specific...

The gage pressure in a liquid at a depth of 3 m is read to be 42 kPa. Determine the gage pressure in the same liquid at a depth of 9 m.

A room and pillar trona mine at a depth of 1,560 ft (475 m) develops pillars 30 ft (9.14 m) wide and 60 ft (18.3 m) long in a flat seam 12 ft (3.66 m) thick. Entries and crosscuts are 24 ft (7.32 m)...

An arched tunnel is driven in moderately blocky and seamy, wet ground at a depth of 2,830 ft where rock properties are: Co = 14,300 psi, To = 1,430 psi, E = 4.25 (106) psi, G = 1.8 (106) psi, =...

An arched tunnel is driven in moderately blocky and seamy, wet ground at a depth of 970 ft. The tunnel is 18 ft wide by 21 ft high; the back arch is semi-circular. (a) Specify a suitable steel set...

An arched tunnel is driven in moderately blocky and seamy, wet ground at a depth of 297 m. The tunnel is 5.51 m wide by 61.4 m high; the back arch is semi-circular. (a) Specify a suitable steel set...

An arched tunnel is driven in moderately blocky and seamy, wet ground at a depth of 600 m. The tunnel is 4.3 m wide by 3.4 m high; the back arch is semi-circular. (a) Specify a suitable steel set...

An arched tunnel is driven in moderately blocky and seamy, wet ground at a depth of 1,970 ft. The tunnel is 14 ft wide by 11 ft high; the back arch is semi-circular. (a) Specify a suitable steel set...

An arched (semi-circle) rectangular tunnel 8.5 m wide and 8.5 m high is driven in dry, moderately blocky, and seamy ground. (a) Select a steel rib suitable for these conditions; specify flange width,...

An arched (semi-circle) rectangular tunnel 28 ft wide and 28 ft high is driven in dry, moderately blocky, and seamy ground. (a) Select a steel rib suitable for these conditions; specify flange width,...

(a) In public key authentication, what must the sender know that an impostor should not be able to learn? (b) For what type of authentication is a digital signature used-initial authentication or...

Sejahtera Clinic is run by six doctors and each of them is assisted by a nurse. When a patient makes an appointment through the system, he or she usually sees the same doctor, but at busy times...

True or false: Electronic data interchange is a general term that refers to the network of connections that runs between banks.

Green Corporation produces microwave units. The following per unit cost information is available: direct materials $36; direct labor $24; variable manufacturing overhead $18; fixed manufacturing...

Rooney Small Engine Repair charges $42 per hour of labor. It has a material loading percentage of 40%. On a recent job replacing the engine of a riding lawnmower, Rooney worked 10.5 hours and used...

Colgate-Palmolive Co. ran a television commercial to show that its shaving cream, Rapid Shave, could soften even the toughness of sandpaper. The commercial showed what was described as the sandpaper...

Morales Corporation produces microwave units. The following per unit cost information is available: direct materials $36; direct labor $24; variable manufacturing overhead $18; fixed manufacturing...

Ortega Company manufactures computer hard drives. The market for hard drives is very competitive. The current market price for a computer hard drive is $45. Ortega would like a profit of $10 per...

9.81 The mean and standard deviation for the heights of adult men are about 70 inches and 3 inches, respectively; for adult women, they are about 65 inches and 2.5 inches, respectively. Heights...

Using our experience with concentrated loading on a simple beam, Prob. 320, consider a uniformly loaded simple beam (Table A97). (a) Show that the stress-to-load equation for a...

The Chicago North Shore & Milwaukee Railroad was an electric railway running between the cities in its corporate title. It had passenger cars as shown in the figure, which weighed 104.4 kip, had...

For each section illustrated, find the second moment of area, the location of the neutral axis, and the distances from the neutral axis to the top and bottom surfaces. Suppose a positive bending...

2. (12p) Compute the following values of P(n,k) and C(n,k). (a) P(6,4)= (b) P(12,3)= (c) C(11,4)= (d) C(14,3)=

When analyzing trees, complexities are often O ( height of tree ) . Given that B - trees can be used to produce trees of lower height than the equivalent BST , explain why; i ) B - trees are not a...

The Ehrhardt Company's last dividend was $2.00. The dividend growth rate is expected to be constant at 3% for 2 years, after which dividends are expected to grow at a rate of 8% forever. Erhardt's...