Grouting is a process of ground improvement by injecting the cementing material, chemical to reduce the permeability of ground and increase shear strength. Cement-based grouts, ultrafine and chemical grouts are popular these days. The common type of grouting techniques and their suitability’s: The following chart depicts the suitability of grout according to grain size diameter.…
The flexible rockfall tunnel is constructed at a location where there is the highest probability of falling rock boulders, shooting rock particles near the hillside roadway, and entrance and exit of the hilly tunnels. Sometimes avalanches of rolling rock fragments also hit the mountain road traffic, thereby disrupting the traffic and causing unsafe traffic conditions.…
The sinking issue is common in fragile geological regions, where rainwater infiltration, temperature variation creates freezing and thawing problem. Subsidence, sinking, and uneven settlement, which occur due to these combined effects lead to severe issues. In many situations, it has also been noticed that the boulders, which are embedded and intermixed in loose sand deposits,…
Barriers are provided in order to ensure the protection of people, livestock, structures from unstable rock fragments, debris, snow slide (in case of avalanche) on slope surfaces and areas surrounding them, which are lying in the vicinity of the installed barrier locations; thereby facilitating the smooth functioning of livelihood without any hindrance. Types of Barriers…
Ground anchors/tie-backs are flexible elements used to hold, restrain and support excavation for building and civil engineering structures either temporarily or permanently. Installation method depending upon the existing ground conditions. Ground anchors are used to securing pile walls, sheet piles, mixed-in-Place walls or diaphragm walls, steep slopes, support embankments, and quay walls. Installing ground anchors is…
Soil nailing is the process of installing reinforcement with a designed spacing of steel bars or nails in the existing ground using a top-down construction technique. The soil nail process is proceeded by installing reinforcement (bar/rod) in the drill hole in the ground, followed by grouting throughout the length. This technique is applied for stabilizing…
WORK: SLOPE STABILIZATION/ TOE STABILITY PROTECTION PRODUCTS: Double Corrosion Protection Passive Cable Anchors Introduction A 192m high Lakhwad Dam with its 900MW underground power station and 86m high Vyasi Dam situated 5km downstream of the Lakhwad with its 120MW power station at Hathiyari. Our project site was located at the Hathiyari Powerhouse station. The…
Micropile is a friction pile that can be both drilled and grouted and have a small diameter. The steel elements in a pile are bonded into the bearing rock or soil with cement grout’s help. These piles can be quickly installed in various kinds of ground with the use of drilling equipment. The micropile application…
Self-drilling anchors are the advanced type of fully threaded hollow steel tube rods. SDA is a fully threaded rod with an inner and outer diameter hollow steel tube. It is provided with a sacrificial drill bit at the end to facilitate the drilling process, coupler to join two SDA bars, screw nut, base plate, etc.…
Introduction The Border Roads Organization (BRO) works for the development of road network infrastructure in India’s border areas. After the formation of BRO on 7 May 1960, the organization is responsible for protecting and developing the border roads in the north and northeastern regions. Atal (Rohtang) Tunnel is a highway tunnel constructed under the mentorship…
