This civils project was to connect a private residential property onto the main Thames Water sewer in Essex.
Excavation: The trench line was cut both sides in the carriageway asphalt. On completion of the saw cutting a hydraulic breaker was used to break the hard surfacing within the carriageway. The foot way excavation for the sewer connection was carried out by hand trial hole method, first to establish the location and depth of any existing services, then to excavate around the services to the required depth of the sewer.
Shoring for the sewer conection: Excavation will be visually monitored to a depth of 1m. At this depth M6 trench sheets and timber frames were installed by competent operatives. When the shoring was securely in place the excavation can proceed. The dig & push method was applied as the excavation proceeded for the sewer connection the trench sheets were pushed to the bottom of the excavation until the desired depth is achieved.
On completion of the shoring works and the excavation being down to the correct depth and locating the existing Thames Water sewer pipe a confined space trained operative can begin to cut the existing sewer pipe to insert the clay junction.On completion of the connection and new pipe work the connection to the Thames Water sewer was inspected and signed off by a Thames Water Engineer.
Then the type 1 was spread and compacted in 150 mm layers until the desired level is achieved. On completion of the back fill procedure the specified asphalt will be laid by hand to complete the works. This completed the Thames Water sewerage connection.