How deep can jet grouting go?

How deep can jet grouting go?

Jet Grouting is usually performed down to depths of 65.6 ft. to 98.4 ft. However, special projects reaching 3.28 ft.

How is Jet grouting done?

Jet grouting uses a high-pressure jet of fluid (generally 20 – 40 MPa) to break up and loosen the soil at depth in a borehole and then mixes it with a self-hardening grout to form columns, panels and other structures in the ground, in order to strengthen the soil mass or to reduce its permeability.

What are the different types of jet grouting?

Depending on the application and types of soils, one of three variations is used: the single fluid system (slurry grout jet), the double fluid system (slurry grout jet surrounded by an air jet) and the triple fluid system (water jet surrounded by an air jet, with a separate grout port).

What is jet grouting pile?

Jet grout piles (JGP) is a ground improvement method that is constructed beneath the final excavation level to prevent basal heave instability, control wall deflections and reduce the strut loads for braced excavations in deep deposits of soft clay.

How many types of grout are there?

There are four basic types of grout: unsanded, fine sanded, quarry type, and epoxy.

Where is jet grouting used?

Jet Grouting can be used in ground retaining systems, cut-off barriers, base plugs of shafts, tunnelling, underpinning and to create rigid inclusions.

What are the advantages of jet grouting?

Jet grouting improves the mechanical characteristics of the soil using a fluid jetting with very high kinetic energy that breaks up the soil structure and mixes the soil particles in-situ with a grout to create a homogeneous mass of high strength reinforced soil-cement material.

How do micropiles work?

Micropiles are small diameter drilled and grouted friction piles. Each pile includes steel elements that are bonded into the bearing soil or rock – usually with cement grout. The bearing stratum is logged during installation drilling to assure that bearing capacity is adequate.

Why pressure grouting is done?

The greatest use of pressure grouting is to improve geomaterials (soil and rock). The purpose of grouting can be either to strengthen a formation or to reduce water flow through it. It is also used to correct faults in concrete and masonry structures.

What is jetjet grouting?

Jet Grouting techniques are employed in a wide range of cases such as: • Underpinning of existing structures; • Diaphragm walls for: a) Dam and cofferdam cut-off walls; b) River embankments structural and waterproof cut-off walls c) Box shape underground structures. • Diaphragm walls gaps repairing.

Why choose a Hütte hydraulic drilling rig?

Hütte hydraulic drilling rigs have been engineered for jet grouting but also a wide range of extensive accessories such as rotary heads and drilling accessories is avaiable to extend the application of Hütte soil drilling equipment to enable the contractor to achieve the best results on site.

What is the JET1 drill/injection string?

The drill/injection string consists of a battery of rods with a coaxial hole in which the grout fl ows at high pressure up to the injection nozzles. With JET1 method, in function of the natural soil conditions, can be obtained J-G- columns with a diameter ranging from 0,5 and 1,0 m.