Eniola Alesin’s Post

Tuodazg-Milling excavator Curve motor, high working efficiency, milling particle size is small, can be directly used for backfilling. Working in the tunnel, the hourly workload can reach 30-60㎡/h The average amount of rock milling can reach 80 to 120 tons per hour The mine works about 120 tons per hour Construction engineering slope correction, foundation excavation, bridge construction, etc. Hydraulic engineering: levee reinforcement, river consolidation, etc.

A common technique used in geotechnical engineering and construction to stabilize rock and soil formations. It involves the installation of steel bolts, also known as rock bolts, into the rock or soil to provide support and reinforcement. Definition. Rock dowel. A 5- to 40-ft long steel reinforcing bar inserted in drilled holes around the periphery of a tunnel and anchored or sealed with mortar or polyester resin to tie rock-blocks or strata together and prevent their loosening or falling out. People also ask What is rock bolting?

A 𝐠𝐫𝐨𝐮𝐧𝐝 𝐚𝐧𝐜𝐡𝐨𝐫 is a load transfer system designed to transfer forces to deeper, more stable soil or rock strata. 🪨🏗️ They are crucial components in geotechnical engineering, providing 𝐬𝐭𝐚𝐛𝐢𝐥𝐢𝐭𝐲 and 𝐬𝐮𝐩𝐩𝐨𝐫𝐭 to various structures. Ground anchors can be installed either 𝐯𝐞𝐫𝐭𝐢𝐜𝐚𝐥𝐥𝐲 or at an 𝐢𝐧𝐜𝐥𝐢𝐧𝐞𝐝 position (as shown in the video) and can be either 𝐩𝐚𝐬𝐬𝐢𝐯𝐞 or 𝐩𝐫𝐞-𝐬𝐭𝐫𝐞𝐬𝐬𝐞𝐝 to 110% of the working load after installation. The primary purpose of geotechnical ground anchors is to 𝐩𝐫𝐞𝐯𝐞𝐧𝐭 horizontal movement while 𝐬𝐭𝐚𝐛𝐢𝐥𝐢𝐳𝐢𝐧𝐠 retaining structures, including sheet piles, bored concrete piles, and steel tubular walls. They can also prevent additional movement or stabilize existing retaining walls and bridge abutments. Ground anchors are used in cofferdams, where internal bracing causes construction problems, and in dock walls and marine structures, where stabilization and strengthening are needed. They are also effective in stabilizing river and canal walls as tie-backs. Ground anchors can be utilized as either 𝐩𝐞𝐫𝐦𝐚𝐧𝐞𝐧𝐭 or 𝐭𝐞𝐦𝐩𝐨𝐫𝐚𝐫𝐲 components in any construction project. Overall, they are a 𝐯𝐞𝐫𝐬𝐚𝐭𝐢𝐥𝐞 and 𝐞𝐬𝐬𝐞𝐧𝐭𝐢𝐚𝐥 tool in modern geotechnical engineering, providing stability and support for a wide range of structures and applications. 🎥Video produced by: Aarsleff Ground Engineering Ltd

𝐏𝐞𝐫𝐦𝐚𝐧𝐞𝐧𝐭 𝐂𝐚𝐬𝐢𝐧𝐠 𝐯𝐬. 𝐓𝐞𝐦𝐩𝐨𝐫𝐚𝐫𝐲 𝐂𝐚𝐬𝐢𝐧𝐠 𝐢𝐧 𝐁𝐨𝐫𝐞𝐝 𝐏𝐢𝐥𝐞𝐬: Using permanent or temporary casings in bored piles at bridge sites is based on the discretion of the designer, geotechnical and project engineers, considering the results of site investigations from borehole logs. ➜ 𝐏𝐞𝐫𝐦𝐚𝐧𝐞𝐧𝐭 𝐜𝐚𝐬𝐢𝐧𝐠𝐬 are necessary in poor ground conditions, to prevent the collapse of the pile hole during or after excavation. These casings provide crucial support to the sides of the hole. It is important to use permanent casings when removal may not be viable, such as in offshore bored piles or when passing through cavity areas in onshore piles. ➜ 𝐓𝐞𝐦𝐩𝐨𝐫𝐚𝐫𝐲 𝐜𝐚𝐬𝐢𝐧𝐠𝐬, on the other hand, are used to retain the sides of the pile holes until concrete is poured. They ensure the concrete can withstand earth and groundwater pressures. Typically, temporary casings are utilized when loose soils are present only in the top layers of the hole. ➜During the construction process, it's important to: 1- Withdraw temporary casings while the concrete is still fluid and close to its original slump. This helps counter the external pressure exerted by surrounding soils. 2- Gradually withdraw the casing slowly after concreting to maintain its direction along the axis of the pile. 3- Maintain a sufficient head of concrete inside the temporary casing when extracted, to fill the concrete to the equivalent volume of the casing (2πR×Thickness×Length). Finally, in addition to permanent and temporary casings, there is another method for executing piles that involve the use of 𝐝𝐫𝐢𝐥𝐥𝐢𝐧𝐠 𝐟𝐥𝐮𝐢𝐝, 𝐬𝐮𝐜𝐡 𝐚𝐬 𝐛𝐞𝐧𝐭𝐨𝐧𝐢𝐭𝐞. This fluid, with specific parameters of density, viscosity, sand content, and pH, is utilized to keep the sides of the borehole from collapsing. Bentonite acts as a stabilizing agent, preventing soil sloughing and maintaining the integrity of the hole during excavation and concrete placement. One of the most exciting milestones in my career life was the Safwa project, which consisted of both land and sea bridges. We successfully constructed over 400 offshore and onshore bored piles, varying in diameter and depth. This achievement was made possible through effective teamwork, time management, commitment to quality, and a focus on maintaining safe working conditions. AS 2159 Piling - Design and Installation AASHTO Standard Specifications for Highway Bridges (LRFD) ACI 336.1 Specification for the Construction of Drilled Piers #bridgeconstruction #piles #casing #drillingfluids #bentonite #geotechnicalengineering #infrastructuredevelopment

#pakaldul #Status AFCONS Infrastructure Limited - A Shapoorji Pallonji Group Company #cvvpl #nhpc Status Power House Works Construction of Power House Cavern, MIV cavern, Transformer Hall cavern, Valve House are in progress. UG Excavation of Transformer cavern, MIV cavern & all 4 no. TRT (length of 104m each) and Transformer Cavern Concreting & Concreting of all 4nos. of Bus ducts have been completed. #Slashing of Surge Shaft-2 is in progress.total till now 135 mtrs Excavation of Vertical Pressure shafts are in progress. Power House machine hall concreting including Control block & service bay, MIV unit (all) concreting are also in progress. Dam Works Construction of U/s and D/s coffer dam is in progress. Total excavated quantity for Tunnel Spillway Outlet, Inlet and Gate Shaft Platform in month of July 2024 is 6500 cum with cumulative achievement of 347665 cum. #Tunnel spillway#1 heading (stage-1 & 2) excavation of 2x456m (912m) completed on 10.11.2023. Total cumulative progress of HRT 1 and HRT 2 till 31.08.2024 is 4027 m (Monthly achievement of 16.6 m). 44.28% Rock filling of CFRD has been completed. E&M Works Work awarded on 02.01.2019. All material of PH EOT Crane-1, MIV crane & PP Valve crane received at site. Grounding system, Stator bars, Rotor poles, Stator frame, Spiral case assembly & Lower Pit Liner Segments of all units, 2 Runners, MIV & Butterfly valve of U#1 & 2, 2 nos. Generator Shafts, Rotor Rim & hub of U#1, GIS Components & GIS EOT Crane and 13 no. GSU Transformer have been received at site. Erection of Draft Tube of all 4 Units have been completed by 11.01.23. Spiral Casing of Unit-1,2,3 & 4 completed. Stator and Rotor build up works of Unit#1 & Stator build up works of Unit#2 are in progress. HM Package Work awarded on 26.08.2019. Erection of 2.9 M dia. #Pressure Shaft Liners of Lower Horizontal Portion PS1A, PS1B, PS2A and PS2B of total length 218m have been completed along with backfilling. Erection of Top Horizontal Portion lining of PS-2 & PS-1 of 6 M dia each have been started on 25.08.2022 & 21.09.2022 respectively and 170 mtr & 212.5 mtr achieved against cumulative length of 173.66 mtr & 221 mtr respectively. Further, #Bifurcation #PS#1 has been completed on 19.03.2024 and Bifurcation of #PS#2 has been completed on 21.06.2024. Erection of #steel liners in #Bifurcation to VH PS1A, PS1B, PS2A and PS2B is in progress. #HRT –TBM Package Work awarded on 03.07.2020. TBM-1 has been launched successfully on 25.07.2023 and cumulative 534m Excavation of Adit-1 have been completed on 23.01.2024 and further excavation of HRT-I of cumulative 2116.18 m out of total 7350m achieved till 31.08.2024. #TBM-2 has been successfully commenced from 26.05.2024 and excavation of Adit-2 for HRT-2 is in progress and cumulative 218 m out of 525m has been achieved till 31.08.2024.

The failure of the Transcona Grain Elevator in 1913 is an important lesson on bearing capacity failure that every civil engineer should know... #structville #foundations #civilengineering https://lnkd.in/dtR4R6D

Designing a foundation for a ground storage tank is a critical engineering task that ensures the stability and safety of the tank. Here are some key considerations and steps involved in the process: 1. Geologic Exploration: Before designing the foundation, it’s essential to study the geologic structure of the construction site and hydro-geologic conditions. This involves soil investigation through pitting and punching to understand the soil’s capacity and characteristics. 2. Foundation Type: The type of foundation for a storage tank can vary. !!Common options include: !!!Crushed Stone Ringwall: A ring of crushed stone that provides a stable base for the tank. !!!Concrete Ring Wall: A circular concrete wall that supports the tank and can handle the pressure exerted by the stored liquid. !!!Reinforced Concrete Slab: A solid concrete slab that can support the weight of the tank and its contents. 3. Construction: The construction of the foundation should use certified materials and follow a design project developed for the specific conditions of the site. The foundation must be built quickly and efficiently to ensure the tank’s stability and reliability. 4. Tank Support: The interior area of the ringwall can use compacted sand or a concrete slab to support the tank bottom. It’s important to ensure that the ground is 100% compacted and free of any objects that could damage the base of the tank. 5. Additional Considerations: In seismically active areas, the tank’s height-to-diameter ratio is an important factor. Tanks are usually designed with a diameter at least twice the height to ensure stability during seismic events.

Today, a subgrade evaluation was conducted successfully for the access road and parking area at the Region of Peel building. In geotechnical engineering, subgrade evaluation is a critical process that entails a comprehensive assessment of the soil properties beneath a pavement or foundation to ensure the stability and longevity of the constructed structure. Fortunately, a few test methods exist to quickly gather the required data in the field: proof rolling, a standard penetration test (SPT), Probe Rod Evaluation, and Dynamic Cone Penetrometer (DCP) testing. What is Proof-rolling? Proof-rolling involves using the heaviest construction truck or equipment on site (Ideally fully loaded, 25 tons of material tandem axle dump truck.  to move forward and backward over each zone. If the subgrade is not well compacted, this will cause "pumping," where moisture is drawn to the surface in silty soils. Additionally, soft spots under the wheels may deflect, either rebounding to the initial position or resulting in permanent rutting. In both cases, the locations of pumping and deflection should be documented, measuring the length, width, and height. Tips: 1.Ensure the driver moves slowly during proof-rolling. 2.Perform two passes on a single straight line to reliably assess an area. Remediation Techniques (Only applicable if failure to meet prescribed specification of the project) :- 1. Discing and Drying (Disking and Drying) 2. Undercut and Backfill 3. Lime Modification and Stabilization 4. Cement Modification and Stabilization 5. Fabrics and Geogrid

ODIN HAMMER 🔨 A revolutionary tool designed to conquer the toughest rock breaking challenges We are proud to be a Odin Hammer Dealer! APPLICATIONS: ROCK BREAKING: Odin Hammers are designed to efficiently break rocks and concrete, making them ideal for excavation and demolition projects. ROAD CONSTRUCTION: These hammers are used to break through tough surfaces like asphalt and concrete during road construction and repair. TRENCHING: Odin Hammers can be used to dig trenches for utilities like water, gas, and electrical lines. QUARRYING: In quarrying operations, these hammers are used to break up large rocks and stones for processing. FOUNDATION WORK: Odin Hammers are used to break through tough surfaces for foundation excavation and construction. MINING: These hammers are used in mining operations for breaking up ore and rock surfaces. LANDSCAPING: Odin Hammers are used in landscaping projects to break up concrete, rocks, and other materials. CIVIL ENGINEERING: In civil engineering projects, these hammers are used for various tasks like demolition, excavation, and foundation work. #excavator #construction #roadbuilders #excavation #heavyequipment #heavydutymechanic #welding #rockcrushing #rockbreaker #quarring #mining #miners #4thofjuly #notlikeus #engineering #foundation #mines

This is a very interesting project using hydrodemolition to prepare the existing dam site for very low temperature, mass roller-compacted concrete placement from the “most state-of-the-art concrete batch plant that's ever been built”.