Question

In: Civil Engineering

Tunnel Problem You are going to build a tunnel 10 miles long with a shaft at...

Tunnel Problem

You are going to build a tunnel 10 miles long with a shaft at one end and a portal at the other. It is part of the first phase of the gateway tunnel to New York.

* The shaft is 185 ft. deep to the invert of the tunnel and 22 ft. excavated diameter.

* The tunnel is 26 ft. excavated diameter in competent sandstone and limestone.

* The profile of the shaft is as follows: From the surface down- 15 feet of fill; 30 feet of sand and clay; 20 feet of silty gravel; 40 feet of limestone and 80 feet of sandstone.

* Groundwater is 35 feet down.

* The tunnel runs for 5 miles in sandstone and 5 miles in limestone.

Determine the following:

1. Using a TBM, how long will it take to excavate the tunnel?

2. Will blasting need to be done anywhere? If so, where?


there is no additinal information.... why answer the question with the tittle?

Solutions

Expert Solution

Commencement of Shaft access will be done by the excvating the top 15 feet fill soil, Sheet piles are required below 15 ft depth to support the sandy clay profile. At depth of 35 ft where ground water is encountered need to be removed using open pump system or deep well. Pneumatic or dredge cassion may be installed for which dredging and sinking operation may be carried out simultaneously.

1. Depending upon overall geological profile, tunnel alignment and design requirements the minimum is 450 to 500 meters/ month for sandstone and limestone rock. Hence for working with 10 miles of sandstone and limestone strata 32 to 36 month would be required. However, other influencing parameters are muck disposal, linings works etc.

It is to be noted that EPB type TBM should be used for these type of rock condition and wet strata.

2. Yes, Drill and Blasting would be required after pumping out water and excavating after drill blast from depth of reaching converging limestone to sandstone strata.


Related Solutions

problem 3-1 You are going to build a C++ program which runs a single game of...
problem 3-1 You are going to build a C++ program which runs a single game of Rock, Paper, Scissors. Two players (a human player and a computer player) will compete and individually choose Rock, Paper, or Scissors. They will then simultaneously declare their choices and the winner is determined by comparing the players’ choices. Rock beats Scissors. Scissors beats Paper. Paper beats Rock. The learning objectives of this task is to help develop your understanding of abstract classes, inheritance, and...
Atlantic Megaprojects has a contract to build a tunnel connecting two Atlantic provinces. The tunnel should...
Atlantic Megaprojects has a contract to build a tunnel connecting two Atlantic provinces. The tunnel should be completed in three years and requires a total investment of $220,000: $80,000 during the first year and $70,000 during each of the second and third year. If they wish, Atlantic Megaprojects could complete the project in two years by subcontracting part of its work. In this case the required investment would be $115,000 during each of the first and the second year. In...
Atlantic Megaprojects has a contract to build a tunnel connecting two Atlantic provinces. The tunnel should...
Atlantic Megaprojects has a contract to build a tunnel connecting two Atlantic provinces. The tunnel should be completed in three years and requires a total investment of $220,000: $80,000 during the first year and $70,000 during each of the second and third year. If they wish, Atlantic Megaprojects could complete the project in two years by subcontracting part of its work. In this case the required investment would be $115,000 during each of the first and the second year. In...
Suppose you are responsible for a project to build an application that is going to collect...
Suppose you are responsible for a project to build an application that is going to collect all the training opportunities for any summer training program. The purpose of the application is to allow the user to search for the most suitable opportunity for him using different search criteria such as GPA and salary. How you would make a Risk Management plan for such a project? I want a Risk Management plan for this project. thanks.
If you were going to build a dashboard or a balanced scorecard for a nursing home,...
If you were going to build a dashboard or a balanced scorecard for a nursing home, what key performance indicators might you use? Explain and elaborate on why your suggested key performance indicators are crucial to effective financial management of a nursing home organization. Think what you would be held accountable for as a manager and develop some easy to read ratios to show history and progress to support your management objectives. Consider if this dashboard would be different if...
For this assignment, you are going to build upon several skills that you've learned: Create an...
For this assignment, you are going to build upon several skills that you've learned: Create an object that contains objects. Using querySelectorAll to read a nodeList from the DOM. Looping through the nodeList then updating the HTML page. Set up Create the assignment in a "week6" folder with the typical files: index.html css/styles.css js/scripts.js This is the standard structure that we'll use in all assignments. Here is the HTML to use for this assignment. Change the meta author tag to...
1- Assume that you are going to build up a model for a system where unit...
1- Assume that you are going to build up a model for a system where unit operation and unit processes are carried out. Explain the various steps involved in the process of model building for the system you have chosen.
You have been asked to design a tunnel in soft ground to be constructed by Tunnel...
You have been asked to design a tunnel in soft ground to be constructed by Tunnel Boring Machine (TBM). Describe how you would set up a finite element model for this type of structure. What are the key features of the model. Discuss the advantages of a 3D model compared to a 2D plane strain model.
An observer (O) is standing on a long tunnel that has a rest length of 12...
An observer (O) is standing on a long tunnel that has a rest length of 12 c.µs.  O sees a long train that he measures to be 12c.µstravel through the tunnel at a speed of 0.600c. The front and back of the tunnel are mounted with strobe lights so that when the front or end of the train reaches the end of the tunnel the light flashes.  So we have 4 events (flashes). Event 1:  Front of train enters tunnel. Event 2:  Front of...
use the 4 action framework from the textbook to describe how you are going to build...
use the 4 action framework from the textbook to describe how you are going to build competitive advantages for IMAX in the market?
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT