The document summarizes the history and evolution of tunneling methods from ancient times to modern techniques:
- Ancient methods included digging with hand tools, controlled fires, and soaking rock in water to crack it. The cut-and-cover method was used in Babylon over 4000 years ago.
- In the 17th century, gunpowder blasting was introduced to build canal tunnels in France. Dynamite replaced gunpowder in the 19th century, powered by compressed air drills.
- The 19th century saw development of the tunneling shield and compressed air tunneling. Freeze-thaw stabilization and grout injection were introduced in the early 20th century.
- Modern techniques include shot
The Leaning Tower of Pisa, one of the seven wonders of the world faced instability and started inclining due to bad engineering and weak soil profile.
In addition to that the city of Italy has a high ground water level which further worsened the condition.
Due to instability conditions the building was shut off in 1990 and after taking necessary countermeasures the building reopened for tourists in 2001.
In 2008, 70 tons of weight were removed as the tower had stopped moving fo the first time in history.
The building Is predicted to remain stable for 300 years to come.
This presentation covers salient features of the stabilisation of the leaning tower of pisa. Presentation is basically based on the account of soil mechanics and other civil engineering techniques.
The Leaning Tower of Pisa, one of the seven wonders of the world faced instability and started inclining due to bad engineering and weak soil profile.
In addition to that the city of Italy has a high ground water level which further worsened the condition.
Due to instability conditions the building was shut off in 1990 and after taking necessary countermeasures the building reopened for tourists in 2001.
In 2008, 70 tons of weight were removed as the tower had stopped moving fo the first time in history.
The building Is predicted to remain stable for 300 years to come.
This presentation covers salient features of the stabilisation of the leaning tower of pisa. Presentation is basically based on the account of soil mechanics and other civil engineering techniques.
Construction failure of structure due to geological drawbacks pisa towerpavan kumar arigela
Overview
Introduction
History of Construction
Characteristics of tower
Initial mistakes
Cause to the lean of tower
History of inclination
Stress due to lean
Efforts to save the tower
conclusion
Some general information about golden gate bridge, San Francisco, America. Longest suspension bridge of his time and most visited bridge till now and marvel of CONSTRUCTION. Many movies also include this bridge because of because of its beauty. What a achievement!!!!
Construction failure of structure due to geological drawbacks pisa towerpavan kumar arigela
Overview
Introduction
History of Construction
Characteristics of tower
Initial mistakes
Cause to the lean of tower
History of inclination
Stress due to lean
Efforts to save the tower
conclusion
Some general information about golden gate bridge, San Francisco, America. Longest suspension bridge of his time and most visited bridge till now and marvel of CONSTRUCTION. Many movies also include this bridge because of because of its beauty. What a achievement!!!!
This construction job story, "Keep on Boring," ran in the November 2017 issue of Foundation Drilling Magazine. It also ran in several American, Canadian, and European construction magazines.
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How to Build a Module in Odoo 17 Using the Scaffold MethodCeline George
Odoo provides an option for creating a module by using a single line command. By using this command the user can make a whole structure of a module. It is very easy for a beginner to make a module. There is no need to make each file manually. This slide will show how to create a module using the scaffold method.
Safalta Digital marketing institute in Noida, provide complete applications that encompass a huge range of virtual advertising and marketing additives, which includes search engine optimization, virtual communication advertising, pay-per-click on marketing, content material advertising, internet analytics, and greater. These university courses are designed for students who possess a comprehensive understanding of virtual marketing strategies and attributes.Safalta Digital Marketing Institute in Noida is a first choice for young individuals or students who are looking to start their careers in the field of digital advertising. The institute gives specialized courses designed and certification.
for beginners, providing thorough training in areas such as SEO, digital communication marketing, and PPC training in Noida. After finishing the program, students receive the certifications recognised by top different universitie, setting a strong foundation for a successful career in digital marketing.
A workshop hosted by the South African Journal of Science aimed at postgraduate students and early career researchers with little or no experience in writing and publishing journal articles.
This slide is special for master students (MIBS & MIFB) in UUM. Also useful for readers who are interested in the topic of contemporary Islamic banking.
Executive Directors Chat Leveraging AI for Diversity, Equity, and InclusionTechSoup
Let’s explore the intersection of technology and equity in the final session of our DEI series. Discover how AI tools, like ChatGPT, can be used to support and enhance your nonprofit's DEI initiatives. Participants will gain insights into practical AI applications and get tips for leveraging technology to advance their DEI goals.
Executive Directors Chat Leveraging AI for Diversity, Equity, and Inclusion
trial 1
1. PREPARED BY :
MOHD ZAMIR BIN OSMAN
2011400498
NURAMALINA BT AHMAD KHAIRI
2011806192
NURDIYANA BT MUMIN
2011232572
MUHAMMAD ‘IZZAT BIN SAID
2011633826
2. Used in India and Mediterranean regions.
Digging tools and copper rock saws are used.
Fire was used to the rock obstruction before
soaking it in water to crack it apart
4. Used in Babylon over 4,000 years ago.
This method is carried out by digging a deep trench,
construct a roof at an appropriate height and cover the
trench.
This techniques is still apply in the process of
tunneling method today.
5. Image : The Bergen Hill Tunnels by Cut and Cover Method
6. Used to blast canal tunnel such as in France.
Introduced in 1681.
Canal tunnel was built to serve a shortcut.
7. Image : Canal du Midi in France by gun powder blasting method.
8. In the form of dynamite.
Replaced the gun powder in the process of tunnel
blasting.
Compressed air and steam were used to power drills
in order to create holes for explosive charges.
Introduced in 1850.
9. Image : Western & Atlantic Tunnel completed in 1850 in Georgia
10. Between 1820 and 1865....
Developed by Marc Brunel and James Greathead, the
British engineers.
Enabling the construction of two tunnels under the Thames
River.
A rectangular or circular enclosure (the shield) was divided
horizontally and vertically into several compartments.
When space had been dug away, the shield was pushed
forward, and the digging process repeated.
TUNNELING SHIELD
11. Image: Diagram of the tunnelling shield used to construct the Thames Tunnel.
12. In 1873,
By American tunneler, Clinton Haskins.
Keeping water from seeping into a railroad tunnel under construction
below the Hudson River by filling it with compressed air.
Still used today, although presents several dangers.
Workers must spend time in decompression chambers.
Limits the emergency exits from the tunnel.
Pressure within the tunnel must be carefully balanced with the
surrounding earth and water pressure, if not will causes the tunnel either to
collapse or burst (which subsequently allows flooding).
13. Image: The railroad tunnel, Pennsylvania R.R. under the Hudson River, New
York City.
14. Early 1900s – 1970s....
To stabilize the soil by freeze it by circulating coolant through pipes embedded at
intervals throughout the area.
Waterproofing – inject grout (liquid bonding agent) into soil or fractured rock
surrounding the tunnel route.
Image: Method of placing concrete in bench walls. Top of waterproofing
suspended from top of sandwall, Bergen Hill Tunnels.
15. Image: Central Pacific Railroad’s Summit Tunnel, Norden, California was in
service from 1868 to 1993.
16. In 1907,
Is a liquid concrete that is sprayed on surfaces.
Has been used as both a preliminary and a final lining for
tunnels since the 1920s.
Image: Devil's Slide Tunnels, CA
17. In 1931,
The first drilling jumbos were devised to dig tunnels that would
divert the Colorado River around the construction site for Hoover
Dam.
consisted of 24-30 pneumatic drills mounted on a frame welded to
the bed of a truck.
Image: Drilling jumbos.
18. In 1954,
Invented by James Robbins, for construction of a dam in South
Dakota.
A cylindrical device with digging or cutting heads mounted on a
rotating front face that grinds away rock and soil as the machine
creeps forward.
Modern TBMs are customized by matching the types and
arrangement of the cutting heads to the site geology; also, the
diameter of TBM must be equal to the diameter of the designed
tunnel (including its lining).
20. * It was developed between 1957 and 1965 in Austria
* Main idea is to use the geological stress of the
surrounding rock mass to stabilize the tunnel
*A concept whereby the ground surrounding an underground
opening becomes a load bearing structural component through
activation of a ring like body of supporting ground
*NATM was originally developed for use in the Alps, where
tunnels are commonly excavated at depth and in high in
situ stress conditions
* Minimise settlement
http://en.wikipedia.org/wiki/New_Austrian_Tunnelling_method
http://www.ritchiewiki.com/wiki/index.php/New_Austrian_Tunn
eling_Method#ixzz2Mqv8uNSG
21.
22. * Also known as tunnel jacking.
* Originated from pipe jacking in early 1960s.
* Small pre-cast concrete boxes were jacked under
existing infrastructures.
* can be in larger span than pipe jacked with can excess
to 20 m
http://en.wikipedia.org/wiki/Tunnel#Box_jacking
http://www.ritchiewiki.com/wiki/index.php/Tunnel_Jac
king
24. *
*Seikan tunnel – Japanese National Railway
*Constructed on 28 September 1971
*Opened on 13 March 1988
25. Tunnel. (2013). Retrieved March 6, 2013, from How
Products Are Made : Volume 6,
http://www.madehow.com/Volume-
6/Tunnel.htm#b
Willis, Z. (2011). Tunneling History and the East River
Tunnels. Retrieved March 6, 2013, from A
Comprehensive Study of the East River :
http://eastriverhistory.webs.com/transportation
/tunnelhist.htm