week 7 constructing

2
Week 7 Constructing This week we explored different roofing systems; the three materials that we use as a roof are steel, tiling and concrete. This is an example of corrugated iron roofing, which is a commonly used roofing type. This roofing type is quick easy and relatively cheap to install. This is also a second common roofing type, tiling. This is however pretty costly and requires a lot of time and labor to install We also went on a site visit to gain some real world knowledge to apply what we have been learning about, firstly we looked at the foundations of a building and how they start at ground level and work downwards until they get to the bottom of the basement level. They do this by first digging a trench around the entire building block and then pouring concrete into it and letting that set. Once this happens earthworks begin as they start to dig down underneath the trench and then form insitu concrete columns using a technique called shotcrete. Once these columns are set, formwork and steel bars are erected between the columns to form concrete walls and again add to the structural wall supports of the building. Trenches that are used to start foundations Columns that are added to at 1.5m at a time, and then shotcrete is formed in between.

Upload: patrick

Post on 08-Mar-2016

219 views

Category:

Documents


0 download

DESCRIPTION

 

TRANSCRIPT

Week  7  Constructing    This  week  we  explored  different  roofing  systems;  the  three  materials  that  we  use  as  a  roof  are  steel,  tiling  and  concrete.      

     This  is  an  example  of  corrugated  iron  roofing,  which  is  a  commonly  used  roofing  type.  This  roofing  type  is  quick  easy  and  relatively  cheap  to  install.          

   

   This  is  also  a  second  common  roofing  type,  tiling.  This  is  however  pretty  costly  and  requires  a  lot  of  time  and  labor  to  install            

 We  also  went  on  a  site  visit  to  gain  some  real  world  knowledge  to  apply  what  we  have  been  learning  about,  firstly  we  looked  at  the  foundations  of  a  building  and  how  they  start  at  ground  level  and  work  downwards  until  they  get  to  the  bottom  of  the  basement  level.  They  do  this  by  first  digging  a  trench  around  the  entire  building  block  and  then  pouring  concrete  into  it  and  letting  that  set.  Once  this  happens  earthworks  begin  as  they  start  to  dig  down  underneath  the  trench  and  then  form  insitu  concrete  columns  using  a  technique  called  shotcrete.  Once  these  columns  are  set,  formwork  and  steel  bars  are  erected  between  the  columns  to  form  concrete  walls  and  again  add  to  the  structural  wall  supports  of  the  building.          

 Trenches  that  are  used  to  start  foundations    Columns  that  are  added  to  at  1.5m  at  a  time,  and  then  shotcrete  is  formed  in  between.        

         

 Spraying  the  concrete  into  the  steel  cage  to  form  reinforced  concrete  to  make  the  basement  walls.                    

             In  the  basement  of  the  second  building  site  we  were  able  to  see  the  use  of  bondek  to  support  a  concrete  slab  to  span  the  ceiling  of  the  carpark  and  to  support  the  next  floor.  Bondek  supports  the  concrete  whilst  it  is  setting  and  then  it  becomes  another  way  to  improve  the  concrete  slab  which  is  poor  in  tension.              This  is  a  good  example  of  how  formwork  is  used  when  a  concrete  slab  is  poured  to  support  it  until  it  hardens  enough  so  that  it  will  support  it  self  when  the  formwork  is  removed.