A tunnel of length of 800 m is to be driven. Part of the total length is through granite and balance is through sandstone. Granite can be tunneled at 10 m per day and sandstone at 20 m per day. Two mutually exclusive site conditions can be (1) A probability of 0.4 for 600 m granite with 200 m sandstone; (2) Probability of 0.6 that each is 400 m long. The probabilistic estimate of total tunneling duration is

Q: Calculate/plot the radial pressure and displacement curves for a 1.85 m radius tunnel subjected to a…

A: Given data: Radius of tunnel, R=1.85 m Hydrostatic stress = 20 MPa Concrete lining radius = 1.70 m…

Q: t do you understand by rock mass properties? What are the purposes of rock mass classification? Name…

A: A matrix of rock material and rock discontinuities is referred to as a rock mass. Its…

Q: A vertical cut is to be made in saturated clay with c=15 kN/m², p=0°, and y= 20 kN/m³. What is the…

A:

Q: Two vanes A and B, with length-to-diameter ratios of 3 and 1 respectively, are each used to make a…

A: VaneAlong vertical plane (KN/m2)Along horizontal plane (KN/m2)A506.671451.5B229.18687.55Explanation:

Q: For a rock mass: RQD=80, J₁ = 4, J₁ = 1, and: Ja 1 Jw 0.33 a) Calculate the rock mass number ( b) We…

A: On the basis of RMR values for a given engineering structure, the rock mass is sorted into five…

Q: A cut is to be made in clay for which the cohesion is 40 kN/m² and = 0. The maximum safe depth of…

A:

Q: Select the rock failure mechanism(s) that occur when drilling. a. Wedging b. Scraping and grinding…

A: Brief concept introduction- Rock failure mechanism- In case of rock failure, there is the formation…

Measuring site work, Excavation and Piling

Bid drawings typically include very little material about the precise requirements of site work operations, measuring site work and excavation work differs from measuring most other works on a construction project. The actual site work conditions are not provided and also the dimensions of the excavations are not known during the pre-construction phase. The precise measurement of the excavation and backfill of the earth material and topsoil is important for a contractor to decide upon the total cost required for the process. All the works should be carried out under OSHA (Occupational Safety and Health Administration) standards to ensure the safety of the workers.