@tunnel.engineering: 1.Rock bolts Drilling and the installation of ground anchors or rock bolts are common techniques used to provide support during excavation in both rock and softer ground. The process involves drilling holes into the ground and inserting steel elements, which are then tensioned or grouted to create a reinforcing effect that improves overall stability. This approach helps to control movement, reduce the risk of collapse, and maintain safe working conditions throughout construction. Ground anchors and rock bolts play an important role in geotechnical engineering, forming a key part of excavation and tunnelling support systems across a wide range of ground conditions. 2.Permeation Grouting Permeation grouting is sometimes applied at the base of shafts constructed with diaphragm walling to form a grouting blanket, serving as an effective barrier against water ingress during construction. In this method, grout is injected under controlled pressure into the soil or rock at the bottom of the shaft, filling voids and reducing permeability. This creates a watertight seal beneath the excavation, which is particularly useful where diaphragm walls installed for ground retention and structural support do not fully prevent groundwater from entering at their interface with the shaft base. This approach has been used in the construction of several shafts in the UK. Find out more about our services and training courses at www.tunnel.engineering #vibroreplacement #geotechnicalengineering #civilengineering #engineering #geology

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Friday 05 September 2025 13:20:56 GMT