Logistics and site layout

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Logistics and Site Layout


The site layout for the new extension to the existing Rose Bowl building needs to take into consideration several factors due to its location. Firstly the close proximity to the fully functional and operational Rose Bowl will cause problems as students and other members of the public will be working very close to the proximity of another building site. Secondly the building site is very close to the centre of town and next to a busy road, also due to the fact the original Rose Bowl is in use it means there is only limited amount of space available to be used for both the construction and storage. The main components that will be present throughout the construction of the extension will be the following:

* Main Contractor site cabins

* Sub-contractors site cabins

* Material storage areas

* Skips (recycling, general waste and hazardous waste)

* Vehicle wash

* Site Entrance and Exit including appropriate security measures

* Fire Assembly point

* Site hoarding around the perimeter

* On site facilities (Toilets, drying room, café/eating area, first aid point)

* Pedestrian walkways

Also throughout the development of the project there will also be the following on site at some time:

* Cranes

* Excavations

* Steel being delivered and erected

* Glass panel installations

Due to the complex design of the building it is necessarily to produce more than one site layout plan. So for this project there will be five separate site layout plans designed specifically for each stage of the project. Firstly there will be the initial site set up then the groundworks followed by the steel frame erection followed by the glass panel installation and finally the internal finishes.

Phase 1 Initial Site Set-up

For the initial site set up the basic site process will take place with a hoarding line being set up around the perimeter of the site. This hoarding line will be adjacent with the original rose bowl on one side and the road on the other side. The site entrance and exit will be in the bottom right and top right of the site boundary, with a temporary road running between them. At the exit to site there will be a vehicle wash to ensure that no much is deposited onto the surrounding roads. The entrance and exit will come with gates and adequate security i.e. turnstiles, gate and security personnel. The main contractor cabins, toilets, drying room and eating facilities will be delivered to site and installed by a Crane Lorry. Site safety signage will be put up in side the site and around the immediate outside of the hoarding line in order to warn people of the dangerous activities that will be taking place. Finally a pedestrian walkway will be set up along side the road so that no workers are walking where they shouldn't be, once this is done site work can commence safely. The first site activity will be to clear the existing car park so that the new works can begin, this will be undertaken by groundwork contractors and the materials will be taken away by lorries entering and exiting the site. Once this job has been completed and the ground has been prepared for the next phase a new site layout will be worked from for the following works.

Phase 2 Groundwork and Excavation for Foundations

The next operation to be undertaken will be the excavating for the foundations and the concrete pour of the extensions foundations. A certain amount of space on site will have to be allocated for the large plant that is used to install the pile foundations in the ground, it will not only require space to carry out its operations but it will also need to manoeuvre a certain amount around site during the course of its use. The main issue to be dealt with during this phase of operations is the transporting in and out of plant and materials. The site transport plan will indicate the procedures involved and the sub contractor specific method statement will have the health and safety measures that are put in place for the duration of their operations. Not much will change from the first phase of works but a clear excavation area will need to be marked out and protected at the edges with barriers while the piles are installed. The sequence of works will start in the top left corner of the extension and work downwards to the bottom left, this will be repeated along the gridlines of the building until all the pile foundations are in place.

Phase 3 Steel Frame Erection

This phase is mainly centred around the delivery and erection of the steel frame of the extension. Once the excavation and installation of the steel reinforced concrete piles has been completed the work on the steel frame of the building can commence. Similarly to the previous phase it will mainly involve the delivery of the steel columns to site and the storage then the construction of the frame using a telescopic crane. In order to complete the works a crane will be needed to move the steel around site and into place for the construction, one 100 ft crane will suffice for the construction of the extension. The method for this will be to have the steel sections delivered to site on lorries where the crane will unload them and move them to the designated storage area until they are required. The sequence for this will be the same as the pilling of the foundations where it will start in the top left of the site and work down the gridline to the bottom left where it will start again on the next gridline to the right and continue in this order until completion. As before none of the original site set up facilities will change with the only major difference being the storage area for the steel and the crane location on site for the duration of the steel erection. Also an increase in the amount of sub-contractor cabins as the amount of work on site increases.

Phase 4 Glass Panel Installation

The penultimate phase is the installation of the glass panels that form the envelope of the building. This phase like the others before it will continue to have the basic site layout mentioned in previous phases, with the main difference coming with the completion of the steel frame is that the crane is dismantled and removed from site. The glass panels will need to be lifted up to be but into place but this can be done with smaller mobile crane and then positioned by workers in cherry pickers. Storage areas will be segregated for the glass panels and all other materials that will be used on site. There will be another increase in the amount of sub-contractor cabins on site as more trades will be able to start work now that the building is waterproof. With more work being done on site there will be an increase in the amount of skips required (recycling, hazardous and general).

Phase 5 Internal Finishes

Once the Glass Panels have been installed the rest of the internal works can commence, this will be the busiest time on site with the largest amount of workers present and a wide variety of operations taking place. The final site set up will therefore be able to manage the high levels of work efficiently without any difficulties, there will be numerous trades including Mechanical & Engineering, plumbing, dry lining, painting, carpenters and floor layers. Since all this work will be taking place inside the entire outside can be used for material storage until the external landscaping needs to be completed. The site plan shows the set up throughout the project and the traffic management plan shows what plant will be required at each stage and how it will manoeuvre around the site safely.