Firedam Civil Pty has completed some very sensitive bores over the years. Because we are predominately in the utility business we have to look and constantly seek out innovative ideas on how best to construct works which have the least amount of impact on stake holders. This could be for reasons of not causing traffic problems, rail crossings, excessive deep excavations, sensitive bush areas, heritage areas, and any other areas that planning authorities may deem not to be disturbed.
We have a range of drilling equipment in our fleet mostly directional drills that can complete these type of works. Where we are constructing water, sewer, gas, communications, electrical pipe work or conduits we usually bore man made driveways, road crossings or any other type of structure. This could be even manicured lawns that we feel cannot be restored to the satisfaction of the client. In the past we have bored on grade and on line into man holes and pump stations for gravity sewers which takes a great deal of planning and expertise from a dedicated experienced crew to hit these targets. We will now list some of the projects.
Armadale Water Main
Seven individual directional bores in water charged ground.
Bores for the construction of a water main.
Several bores for road crossings for fire mains and irrigation mains
Sewer amplification - this was a continuous bore for a 225 gravity pipe, 416m long, 75m deep at the deepest. This had to on grade and in line to hit the main sewer brick tunnel which was 75m under a hill. We hit the tunnel within 80mm of our target. This was achieved by using specialised ground penetrating radar to keep track of the head of the drill rig.
Cardiff Market Place
3 x thrust bores, 2 x 508mm and 1 x 220mm for the construction of water mains These were thrust bores where we had to jack in a liner pipe because it was in a mine subsidence area and the client was worried that the ground could give way at a later stage rupturing the new water pipe if there was not a continuous welded sleeve pipe to bridge any subsidence
When we bore smaller diameter pipe in suburban areas under roads and driveways we generally use a dry bed bore as it is a more cost effective way to construct larger runs. We use our directional drills to drill PE for long bores of communication, electrical, fire mains, water mains and pressure mains. For heavier pipe such as stormwater we tend to use a jacking system. Again, we are more than happy to discuss the needs of what a client may require and also point out the pros and cons of what method best suits the works.