logging in or signing up Earthwork and Ground Technology kolaterahul Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: Embed: Flash iPad Dynamic Copy Does not support media & animations Automatically changes to Flash or non-Flash embed WordPress Embed Customize Embed URL: Copy Thumbnail: Copy The presentation is successfully added In Your Favorites. Views: 236 Category: Education License: All Rights Reserved Like it (0) Dislike it (0) Added: July 09, 2012 This Presentation is Public Favorites: 0 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript PowerPoint Presentation: Earthwork and Ground Technology Site ImprovementPowerPoint Presentation: Methods of site improvement •Removal and replacement •Grouting •Stabilization using admixtures ReinforcementPowerPoint Presentation: Removal and replacement • One of oldest and simplest methods is simply to remove and replace the soil •Soils that will have to be replaced include contaminated soils or organic soils •Method is usually practical only above the groundwater tablePowerPoint Presentation: Grouting • Defined as the injection of a special liquid or slurry material called grout into the ground for the purpose of improving the soil or rock •Types of grouts - Cementitious grouts -Chemical groutsPowerPoint Presentation: Grouting methods Intrusion grouting Consists of filling joints or fractures with grout Primary benefit is reduction in hydraulic conductivity Used to prepare foundation and abutments for dams Usually done using cementitious groutsPowerPoint Presentation: Permeation grouting Injection of thin grouts into the soil Once the soil cures, becomes a solid mass Done using chemical grouts Used for creating groundwater barriers or preparign ground before tunneling Grouting methodsPowerPoint Presentation: Grouting methods Compaction grouting When low-slump compaction grout is injected into granular soils, grout bulbs are formed that displace and densify the surrounding loose soils. Used to repair structures that have excessive settlementPowerPoint Presentation: Grouting methods Jet grouting Developed in Japan Uses a special pipe with horizontal jets that inject grout into the ground at high pressures Jet grouting is an erosion/replacement system that creates an engineered, in situ soil/cement product known as Soil cretesm . Effective across the widest range of soil types, and capable of being performed around subsurface obstructions and in confined spaces, jet grouting is a versatile and valuable tool for soft soil stabilization, underpinning, excavation support and groundwater controlPowerPoint Presentation: Stabilization using admixtures The soil stabilization means the improvement of stability or bearing power of the soil by the use of controlled compaction, proportioning and/or the addition of suitable admixture or stabilizersTypes of soil stabilization: Cement stabilization Bituminous stabilization Types of soil stabilizationCement stabilization: C ement stabilizationBituminous stabilization : Bituminous stabilizationPowerPoint Presentation: Cement stabilization Admixture used is portland cement. It gives good degree of stabilization. This is used for all types of soils except clayey soil. Bituminous materials like asphalt is used. It increases soil impermeability. This is used for dry soil. Bituminous stabilizationPowerPoint Presentation: Reinforcement • Soil is stronger in compression than in tension •To improve strength in tension, geosynthetics placed in soil for soil reinforcementPowerPoint Presentation: ReinforcementThank you!: Thank you! You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.