What is the tremie method?
A tremie is used to pour concrete underwater in a way that avoids washout of cement from the mix due to turbulent water contact with the concrete while it is flowing. This produces a more reliable strength of the product.
What is the recommended minimum diameter of a tremie pipe?
While placing concrete by tremie method, all tremie pipes should be cleaned before and after use. The diameter of tremie pipe should be preferably 200 mm for constructing piles of all diameters within 600 mm.
How a tremie works in placement of concrete?
Tremie concrete refers to placement by gravity feed from a hopper through a vertical pipe extending for above the surface to the underwater floor. As concrete flows from the bottom of the pipe, more is added to the hopper so that the tremie pipe is continuously charged with fresh mix.
What are the methods used to concrete under water?
Following are the methods of underwater concreting:
- Tremie method.
- Pumping technique.
- Hydro valve method.
- Pneumatic valve method.
- Skip method.
- Tilting pallet barge method.
- Preplaced aggregate concrete.
- Toggle bags method.
What is a tremie pipe?
A tremie is a pipe that can be used for pouring concrete below ground level, often underwater. Common applications include piling works, basements, diaphragm walls, caissons, underwater foundations, and so on. A tremie is made of rigid metal or plastic tubes, generally with a diameter ranging from 20 – 30 cm.
How does tremie pipe work?
When the whole length of the pipe is filled up with the concrete, the tremie pipe is lifted up and a slight jerk gave by a winch and pulley arrangement. When the pipe is raised and given a jerk, due to the weight of concrete, the bottom plug falls and the concrete gets discharged.
What is a concrete hopper?
A concrete hopper is an extremely heavy duty self dumping hopper capable of handling extremely heavy materials such as concrete. We have five models available starting with 8,000-pound load capacities and holding up to 6 cubic yards.
What is meant by Tremie concrete?
Definition of tremie : an apparatus for depositing and consolidating concrete under water consisting essentially of a tube of wood or sheet metal with a top in the form of a hopper and being usually handled by a crane.
How construction is done underwater?
Placement methods: They are filled with wet concrete and is squeezed out by a diver. Bagwork – In this method, bags are filled with rich mix concrete, which are made of open weave material. They are either diver- handled bags or placed using a crane. This method is used for temporary works or short term solutions.
What is the mixture of RCC?
Generally, concrete mix ratio 1: 1.5: 3 or 1: 1: 2 (Cement, Sand and aggregate) used for rcc column construction, but, in house, typically, most common, safest best concrete mix ratio used for RCC column is 1: 1: 2 (Cement, Sand and aggregate), in which one part is cement, 1 part is sand and 2 part is aggregate.
Is pile a reinforcement code?
Following are the Indian Standard Codes on Pile Foundations: IS 2911 : Part 1 : Sec 1 : 1979 Driven cast in-situ concrete piles. IS 2911 : Part 1 : Sec 2 : 1979 Bored cast-in-situ piles.
What is tremie grout?
DESCRIPTION. EUCO TREMIE GROUT is specially designed for use in underwater grouting applications. This highly flowable, cement based, non-shrink grout remains in a cohesive, well blended mix when placed or pumped in off-shore concrete repairs.