Wednesday, October 4, 2023

Telford Road Construction : With Features & Figure

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Telford Road Construction was proposed and implemented by Scottish Civil Engineer Thomas Telford (1757 – 1834 AD), the founder & first president of the Institution of Civil Engineers (ICE) in London, who began road construction in the early 19th century.

✔ He believed in using a heavy foundation above the soil subgrade to keep the road foundation formed. He also insisted on providing a definite cross slope for the pavement’s top surface by varying the foundation stones’ thickness.

✔ He proposed providing cross drains at an interval of almost 90m, usually laid below the foundation level.

 


 

1. What were the features of Telford Road Construction?

Some of the features of Telford Road Construction are:

a. Stones of varying sizes (17 – 22 cm ) were utilized to make the road foundation.

b. Above this layer, angular broken stones of 7 cm size and 10 cm thickness were used in the central area, and broken stones along with lime mortar were used at the sides.

c. Generally, a wearing surface with a slope of 1 in 45 and thickness of 4 cm was constructed using pebels.

d. Cross drains were provided at an interval of almost 90m, usually laid below the foundation level.

 

Telford Road Construction : With Features & Figure

 


 

2. How were Telford Roads constructed?

✔ To construct Telford Road, the initial step was to prepare the subgrade, which was the layer of soil where the road was built.

✔ Then, the foundation layer was built with large stones ranging from 17 to 22 centimeters in size, which were meticulously hand-packed for a secure fit.

✔ Following this, the intermediate layer, consisting of angular broken stones of 7 cm in size and 10 cm in thickness, was used in the central area, and broken stones along with lime mortar were used at the sides.

✔ The wearing surface composed of broken stones, which was the top layer of the road, was then applied, with a slope of 1 in 45 and a thickness of 4 cm.

 


 

3. Was Telford Involved in the Design of Bridges Also? 

Besides roads, he was also involved in the design of the following bridges & aqueducts stated below:

Year Name / Location
1792 Montford Bridge
1796 Buildwas Bridge
1796 Longdon-on-Tern Aqueduct
1797 Coundarbour Bridge
1798 Bewdley Bridge
1801 Chirk Aqueduct
1805 Pontcysyllte Aqueduct
1806 Glen Loy Aqueduct, Caledonian Canal
1808 Tongland Bridge
1809 Dunkeld Bridge
1810 Bridgnorth Bridge
1811 Helmsdale Bridge
1812 Bonar Bridge
1813 Telford Bridge, Invermoriston
1815 Craigellachie Bridge
1815 Dunans Bridge
1815 Waterloo Bridge, Betws-y-Coed
1818 Sligachan Old Bridge
1819 Bannockburn Bridge
1820 Cantlop Bridge
1823 Stanley Embankment
1824 Eaton Hall Bridge
1826 Conwy Suspension Bridge
1826 Menai Suspension Bridge
1826 Mythe Bridge
1827 Holt Fleet Bridge
1827 Over Bridge
1827 Bridge of Keig
1829 Galton Bridge
1831 Dean Bridge, Edinburgh
1831 Lothian Bridge, Pathhead
1832 Broomielaw Bridge, Glasgow

 

Read Also: Ancient Roman Roads
Verified Article By Er. Madhu Krishna Poudel
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Er. Madhu Krishna Poudel
Er. Madhu Krishna Poudel
He is a founder and lead author of Dream Civil International and his civil engineering research articles has been taken as source by world's top news and educational sites like USA Today, Time, The richest, Wikipedia, etc.
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