Micropiles: Advantages, Uses, and Applications
Micropiles: are structural elements that transmit the load from one structure to deeper soil layers.
Advantages: Speed, economy and minimal discomfort compared to other works implementing systems. Facilidad inclined angles. The drill is very similar to that of a survey. Because of its thinness works almost exclusively by stem so the tip rests in a more compact layer.
Disadvantages: The relationship between the cost and the maximum load is greater in a micropile in a pile. No have a good performance when large amounts of water seeping into the excavation. The quality depends heavily on the implementation process is rigorous.
Uses: It is used when the surface layers of the land do not have the necessary bearing capacity to absorb loads transmitted through the structure. When the charges are reduced and / or space is limited, it is possible to take micropiles.
Socalzado with micropiles:
The reinforcement is usually done by drilling the foundations for the sides. Micropiles are placed at an angle with respect to the vertical.
Physical Behavior
High friction force generated by the shaft
Variable diameter cast body
Minimal resistance to bending moments
Ability to cross barriers
Conclusions
It is a method that requires no additional structural elements for execution. They are versatile to be performed in confined and inclined angles, which helps to increase the carrying capacity to horizontal forces, such as earthquake forces. Not respond well to demands strict control of deformations, therefore the quality of micropile function depends largely on the thoroughness of its implementation. Allow an increased capacity to arrange them in groups, with proper spacing.
SOCALZADOS: VERTICAL ELEMENTS RESPONSIBLE FOR TRANSFER CHARGES AT A COMPATIBLE WITH THE PROJECT.
Shoring: RESPONSIBLE FOR INCLUDE soil pressure. FINDING COMMON IS CURRENTLY TENSORS.
Piles for the building: There are various technologies applicable to construction works. Providing solutions to problems of foundations. Land improvements, and shoring structures socalzados name a few. Among the technologies commonly used are the following: post tensioning Anchor, Deep Micropiles for foundations, wall screens, bored piles, Berlin Wall
Classification of piles according to the way it works: first-order rigid piles: those whose peak reaches to the ground transmitting the load applied to the head. The action side of the field eliminates the risk of buckling
Floating piles: Those whose tip does not reach the final, being driven into the loose soil and resisting by adhesion. resistance value is a function of depth, diameter and area. Lands are located in low average strength and convey its load by friction, through the shaft.
Semi-rigid piles. Those whose tip reaches the final, but this is so deep, or is so shaky that simultaneously resists the pile tip and grip
The manner of its execution: piles precast piling. Are driven into the ground by a machine to blow hammers, pneumatic hammer are prefabricated, made its entire length with interlocking sections. It is important to note that the operation of ramming the pile should always be done from the inside out.
Under construction system: precast piles piles, or compacted, executed on the basis of ground displacement. Excavated or drilled piles, executed on the basis of extraction and land filling of concrete.
According to the diameter of the pile:
a) micropiles: diameter less than 200 mm (20 cm).
b) conventional piles: 300 to 600 mm (60 cm).
c) large-diameter piles, 800 mm diameter. (80 cm)
d) display piles of a pseudo rectangular section.
e) pile-shaped cross section.
Screen walls: they are used as temporary retaining walls and / or final results of the excavations, especially when groundwater is present. are a type of deep foundation is widely used in high-rise buildings, which acts as a retaining wall and provides many advantages for cost savings and increased development in areas
Berlin Wall. This technique is a wall by ramming. H profile, 1.5 m apart. approx. between shoring perfiles. Esta typically consists of vertically bended metal profiles, which are placed between the wooden planks to prevent the release of the land.