Few companies can today offer the range of specialized services that Italthai Trevi can provide to a Client. Our major strengths include construction of bored cast-in-situ piles, diaphragm walls, barrettes, soil improvement, micropiles, drilling and grouting, consolidation andimpermeabilization, rock anchors, as well as other services which may be required by the client from time to time.
1. Bored Piles and Barrettes
This form of substructure construction is the most appropriate and effective for deep foundations necessary to sustain the high capacity loads generated by building and infrastructure works. Italthai Trevi has offered this type of pile from 600 mm. up to 2,000 mm. in diameter, and to a depth of 70 m. from existing ground level. The equipment we used for these procedures is the most modern and effective of its kind, and can be adopted to meet the most technologically demanding of working conditions, including piling in rock foundation. Italthai Trevi’s bored piles equipment fleet includes among the most modern hydraulic rigs, such as SR40, SR70 and R930 capable to carry out piles up to 2,500 mm. in diameter to 80 m. in depth Rectangular shaped panels, also called barrettes, are carried out when high vertical and lateral loads are foreseen and are executed with hydraulic grabs.
2. Diaphragm Walls
The reinforced concrete diaphragm wall is the most essential supporting structure for deep excavation, berthing wharves, car parks and underground railways. Italthai Trevi is able to provide reinforced concrete diaphragm walls from 600 mm. to 1,500 mm. in thickness.
Diaphragm walls and barrettes are constructed by digging a panel filled with bentonite mud, putting a reinforcement in place and removing the slurry by means of concrete pouring from bottom up. For the excavation, Italthai Trevi uses hydraulic or mechanical grabs according to the depth of the wall. With hydraulic grab, Italthai Trevi has performed barrettes 70 m. deep.
3. Soil Improvement
The company has developed several soil improvement methods, the most common are jet grouting and soil cement columns.
There are 3 different types of jet grouting application:
-with injection water/cement mix
-with high pressure jet of cement grout and air to break up and mix the soil in situ
-with high velocity jet of air and water to break up and partially remove the soil in situ, followed by injection of cement grout mix.
The soil-cement columns consist of mixing in-situ cement grout with existing soil with high speed agent coming through a fly-auger of selected diameter, creating a columns of stabilized soil.
4.Micropiling, Drilling and Grouting, Anchors
Using micropiles, Italthai Trevi can overcome foundation problems which cannot be solved by using other systems due to existing restrictions, such as low headroom (basement, tunnel etc.)
Drilling and grouting is widely used for used for rock impermeabilization, especially for dam construction. Italthai Trevi was actively involved in most of the dams constructed in Thailand. Anchors are implemented to stabilize rock sections and are commonly installed in tunnels, excavated in rock formation, to prevent caving in.
