What is grouting PPT?
Grouting • INJECTION OF SLURRY/LIQUID SOLUTION INTO ROCK OR SOIL. • INJECTED MTRL IS GROUT • TECHNIQUE DEVELOPED FOR MAKING VERTICAL SEEPAGE BARRIER BY CEMENT SLURRY. • CEMENTING CAPABILITY INCREASES SOIL/ROCK STR.
Where is compaction grouting used?
Compaction Grouting uses controlled displacement to increase the density of soft or loose soils. It is typically used for settlement control, structural re-leveling, and remediation of sinkholes.
What are the advantages and disadvantages of compaction grouting?
It is a very effective, affordable, and practical soil stabilization technique, and many satisfied clients throughout the region have been pleased with the success of this method when installed by Engineered Solutions. The one main disadvantage of this technique is that it is a bit messy and may require cleanup.
What is grouting and types of grouting?
Grouting is an advanced technique in which fluid-like material made up of cement, sand, water, or chemicals injected into soil or rock formation to change its physical properties….Types Of Groutings:
- Permeation Grouting:
- Compaction Grouting:
- Jet Grouting:
- Rock / Fissure Grouting:
- Compensation Grouting:
Why compaction grouting is not suitable for stabilizing soils near surface?
There are situations for which compaction grouting is not suitable: It should not be used where the ground above the grouting area has limited overburden as it may heave the ground around the bulb column. Typically, an overburden of at least five feet is needed.
What is compaction pile?
One of a group of piles, driven in a pattern, to compact a surface layer of loose granular soil to increase its bearing capacity.
What is grouting and its application?
Grouting is done for filling the voids between the rock face and lining in tunnel work. It is used for fixing tendons post-tensioned in prestressed concrete construction. It is used for repairing pavement and ground below the foundation. It used for repairing cracks in concrete and defects in masonry.
What is the name of grouting process?
Cement Grouting is a process by which cement is injected under pressure to fill fractures and voids in concrete structures. Chemical Grouting: Chemical grouting transforms granular soils into sandstone-like masses by filling the voids with a low viscosity, non-particulate grout.
What are the two principal uses of soil grouting?
Grout may also be used in the formation of pile foundations, ground anchors, under-reaming, underpinning, in road construction, dam construction, and other applications. Different materials may be used for grouting depending upon factors such as the soil or rock type and the area to be grouted.
Where are compaction piles used?
Sand compaction piles have extensively been used in many countries for offshore development projects. These piles help improve the stability by reducing the liquefaction potential and settlement of various structures constructed on” the land reclaimed from the sea.
What is sand compaction?
The sand compaction pile method (hereinafter abbreviated as the SCP method) is a method for improving soft grounds by means of installing well-compacted sand piles in the ground. It combines such fundamental principles for ground improvement as densification and drainage.
What are the properties of grouting?
The basic properties of a grout material are dimensional stability, strength, elastic modulus and thermal properties. Dimensional stability: It refers the property of the material to change in shape or volume.
What is compaction piles?
What is compaction grouting and how does it work?
The expansion of the grout bulbs displaces surrounding soils and the grouting increases the density, friction angle, and stiffness of surrounding granular soils. You can increase effectiveness by sequencing the compaction grouting from primary to secondary to tertiary locations.
How is Grout packed in rigid soil?
In rigid soils or in intact rock strata a self expanding packer is placed directly above the lowest zone and grout is pumped in.
What are the 7 desirable properties of grout?
7. 7 Desirable properties of grout Suitable viscosity High Viscosity for Coarse and Moderately Permeable soils Low Viscosity for Fine grained soils of low permeability Correct setting time Max. Volume with minimum weight Strength Stability Durability 8.
What are the different types of grout?
Include Cement grouts, bentonite grouts and chemical grouts. • Grouting into an open hole in self-supporting ground through pipes at the surface through an injection pipe held in place in the hole or casing by a packer.