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Grouting Techniques in Soil Stabilization

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Grouting Techniques in Soil Stabilization

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Questions and Answers

What is a common use of jet grouting?

To stabilize sinkholes or reduce sinkhole potential

To increase the bearing capacity of liquefiable soils

To underpin foundations such as quay walls and heavy structures (correct)

To construct cemented soil columns in rubble fills

What is a desirable property of grout?

High viscosity for fine grained soils

Correct setting time (correct)

Maximum volume with maximum weight

Low viscosity for coarse and moderately permeable soils

What factor affects the rate of injection of grout?

Grain size distribution of soil

Viscosity of the grout

Shear strength of soil

All of the above (correct)

What is the maximum grouting pressure to avoid disturbing soil particles?

20kN/m2 Signup and view all the answers

What is the purpose of knowing the grain size distribution of soil?

To show the relationship between grout particle size and void dimensions Signup and view all the answers

What type of soil is often treated with displacement grouting?

All of the above Signup and view all the answers

What is the primary purpose of permeation grouting?

To create a cemented mass in coarse, granular soils Signup and view all the answers

What is the common use of displacement – soil fracture grouting in tunneling?

To stabilize overlying structures Signup and view all the answers

What is the characteristic of the grout used in displacement – compaction grouting?

Low slump, mortar grout Signup and view all the answers

What happens when the grout pressure is greater than the tensile strength of soil or rock in displacement grouting?

The lenses compact surrounding soil and lift the overlying soil and structures Signup and view all the answers

What is the result of permeation grouting in coarse, granular soils?

The creation of a cemented mass Signup and view all the answers

What is the primary difference between displacement – soil fracture grouting and displacement – compaction grouting?

The purpose of the grouting technique Signup and view all the answers