Shaft Sinking
We have been involved in the design, methodology, and implication of all variations of shaft sinking techniques. From conception to completion, caisson shafts, underpinned shafts, diaphragm walls, and tunnel eye/portal construction.
Rorcon has participated in shaft sinking operations globally.
WHAT IS SHAFT SINKING
Shafts can be used for a number of purposes. They frequently serve as access points for construction of traditional "horizontal" tunnels.
They can be used instead of deep sheeted pits for pipejacking operations, storage and pumping stations, TBM launching and receiving, micro tunnelling, guided auger boring, and timber heading access. Shafts are designed to occur at various intervals along the tunnel drive, depending on the scheme, they form temporary or permanent access points to move spoil, plant, materials and personnel in and out of a tunnel.
UNDERPIN
This method of shaft construction is generally for shafts larger than 20.00m diameter the underpinning construction method is used; however, ground conditions must be suitable, and firm, dry clays and rocks are most appropriate.
CAISSON
The caisson technique is usually utilised for shafts between 2M – 20M in diameter. This method uses hydraulic jacking rams from the surface pressing rings downwards as continuous excavation occurs from the middle of the shaft.
The caisson technique is a preferred method for sinking shafts in poor ground conditions such as sand, gravel or ground with high water levels.
Diaphragm Walls
Diaphragm walls are also referred to as slurry walls since they are made utilising the slurry supported trench method to construct cast in-situ reinforced concrete retaining walls. A They are a continuous reinforced cast-in-place concrete wall. Station boxes, underpasses, tunnel portals, and open cut and cover tunnels are examples of typical usage. They may be built in most ground conditions and are particularly well suited for big, open locations where buildings more than 25 m deep are needed.
Rorcon's extensive experience in underground construction includes a wide range of shaft sinking operations across the globe. The company has been involved in all aspects of shaft sinking, from design and methodology to the implementation of various techniques. Rorcon's expertise extends to all types of shaft sinking methods, including caisson shafts, underpinned shafts, diaphragm walls, and tunnel eye/portal construction. The design and construction of a shaft is a complex process that requires careful planning, precision, and specialized equipment. Rorcon's team of experienced professionals has the knowledge and expertise to deliver successful shaft sinking projects that meet the highest standards of quality and safety. From the initial stages of planning and design, through to the excavation and construction of the shaft, Rorcon has the skills and experience necessary to ensure successful project completion. Rorcon's involvement in a wide range of shaft sinking operations worldwide demonstrates our ability to deliver complex underground projects successfully. The company's expertise and experience in the field of underground construction make us a trusted partner for clients looking to complete challenging projects in a safe, timely, and cost-effective manner.
We bring our value engineering ideas and attention to detail to life in all that we do, and have vast experience and skills involved in shaft sinking and ancillary activities. Check out our feature in the NATM for what has been described as an “ingenious” shaft design, designed to save time, save resources, and increase safety.
