SAMPLE FOUNDATION DETAIL OF A STEEL TELECOMMUNICATION TOWER WITH 3 LEGS

Foundation for a Greenfield Telecommunication Tower

Normally in telecommunication tower construction, there are different types of towers design & built in the world depending on the height, location, weight of antennas or some other factors. Normally the towers ranging from 6m to 80m or more. The smaller towers like 6m - 12m basically design as poles (cylindrical sections/ tubes with a foundation) which erected on roof tops of buildings or other possible locations mainly in urban areas. And 12m - 30m smaller towers which also erected on top of roof of buildings. 30m and above are normally constructed as Greenfield towers, except other than in special cases.

Greenfield or tall telecommunication tower in steel can be either self supporting or guyed mast types. In Guyed mast towers, the stability of the tower is ensured by the cable guides provided. And in the self supporting type towers, the stability is maintained by the foundation and the tower itself.

Normally the self supporting tall steel towers consists of either 3 or 4 legs based on the manufacture & design.

Normally a template will be using for the base concreting. This template is to ensure the correct dimensions in between the stump columns and the correct positioning of the anchored bolts ready to receive the legs of the tower.

The design of the foundation will be vary with the landscape of the location, and the height, loading, etc. of the tower. In addition to footings and column stumps, there can be tie beam in between depend on the terrain and soil condition of the location.

A Sample design/ detail of a 3 legged telecommunication tower is given below.

Mix -->

Another sample set of detail drawings are shown below.

Comments

BORED AND CAST IN SITU PILES

Bored and cast in-situ piles or bored & cast in place piles carries the process of installation in the name it self. A bored and cast in-situ pile is installed by boring the soil and or rock using heavy machinery and pouring concrete to the bored hole with or without steel reinforcement. Figure: Rotary drilling machines in the process of pile boring You can watch the detailed process in video form the following link https://www.youtube.com/watch?v=u6YGxSzvmKo You can check more details from the following link MOS for Bored Cast In situ Pile Installation https://engcivilstuff.blogspot.com/2020/03/bored-piling-installation-by-rotary.html

MOCK UP TEST FOR LARGE CONCRETE POURS - TEMPERATURE MONITORING

Mass concrete is defined as "any volume of concrete with dimensions large enough to require that measures be taken to cope with the generation of heat from hydration of cement and attendant volume change to minimize cracking." [ ( ACI Committee 207–Mass and Thermally Controlled Concrete ) Mass concreting can result in high temperatures in concrete core during hydration process. Which can result thermal cracking of concrete in a severe way. Basically the temperature variance (in different locations of the concreted element) or the temperature gradient will cause the thermal cracking.

SHEET PILING

Sheet Piling is a common solution for temporary shoring work in deep excavations in the field of civil engineering. Sheet pile is a steel pile with the shape of letter C. Width, thickness, length and the shape of the sheet piles are in different categories. Normally the widths are in the range of 300mm to 700mm. And the length of the piles are normally 6m or 12m. Sample sizes of sheet piles are shown in above table.

Civil Engineering Knowledge for All

Search This Blog