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What is the intelligent grouting technology in pile grouting?

2017-05-17 10:33:30

1. Construction process
Pile foundation grouting technology as following shows

pile foundation grouting technology

2. Main technology

Pre install the grouting pipe and grouting valve in the reinforcement cage. After a certain period time of being a pile, pile side grouting and pile bottom grouting is needed. The grouting method can reinforce pile bottom sediment and pile side mud. It play a reinforcement role for pile bottom and pile side in a certain range of soil through the infiltration (coarse soil), split (fine soil) and compaction (unsaturated loose soil) grouting. The intelligent grouting technology can reinforce pile side resistance and pile end resistance. Improve the vertical and horizontal bearing capacity of single pile. Reduce the settlement and horizontal deformation.

Under the condition of optimizing the process parameters, the vertical bearing capacity of single pile can be increased by 50% ~ 120%. The horizontal bearing capacity is increased by about 30%. The increase of coarse grain soil is higher than fine grain soil. Reciprocating grouting about pile side grouting and pile bottom grouting is better than just pile bottom grouting. Pile foundation settlement and horizontal displacement can be reduced by about 30%.


pile side grouting


Pile side grouting


Pile bottom grouting

Pile bottom grouting


3. Technical indicators

According to the characteristics of formation, pile length, bearing capacity increase and the use of pile function (compression, pull) etc., grouting pile can use the following grouting method: pile side grouting pile bottom grouting, reciprocating grouting -- pile side and pile bottom grouting. The main technical indicators as below:

Water-cement ratio: below ground water level: 0.5 ~ 0.7, above ground water level 0.6 ~ 0.8

Maximum grouting pressure: soft soil layer: 1 ~ 2 MPa, weathered rock: 10 ~ 16MPa.

Grouting cement: Gc = apd (pile end) + asnd (pile side),
ap = 1.8 ~ 2.0, as = 0.6 ~ 0.7,
n - Pile grouting section number
d - Pile diameter (m)

During the actual project, the above parameters can adjusted according to the type of soil, soil saturation, pile size, bearing capacity increasing and other factors. And confirm according to the grouting test.


4.    Automatic Control of Grouting Process

Automatic grouting machine and grouting recorder

Grouting recorder can reduce the uncertain interference factors in the manual operation of the grouting process. Grouting process can achieve automatic control. Cement amount and the grouting pressure can be realized in real time.


Grouting track record

 

Project track record A4 paper

 

project track record small paper

Automatic control system and data transmission equipment: Computer program automatic directly control water and cement consumption through the flow meter. Grouting pressure is real-time monitoring by pressure sensor. Flow is real-time monitoring by flow meter. Grouting recorder can print by printer at the worksite. It also can export data by U disk.

As shown above: during the intelligent grouting technology,
grout mixer and grout agitator (or grout mixer & agitator), grout pump will be used. Users can also choose grout plant / grout station to save time and labor.

Grout mixer and agitator

Cement mixer & agitator is a combination of mixer and agitator, it is specially design for continuous cement mixing and grouting in ground/underground engineering. It can fast mix water, cement and additive, then the mixed slurry can be stored into the agitator, thus the mixing work can continuously be done.

grout pump

Low pressure/ medium pressure/ high pressure grout pump are all provided by us.

Grout plant

Grout plant, also known as grout station, grout mixer pump or grout equipment, it is a combination of mixer, agitator and grout pump in one plant. The special mixing effect of cement or bentonite with water is archived in mixer by a high turbulence created in the pump casing. This turbulence with its high shear forces separates the cement or bentonite particles which results in a fully hydrated suspension.

For more information about
grouting equipment, please email us: sales@leadcrete.com.