Pile foundation

 

(57) Abstract:

Use: it is used for buildings, structures on self-compacting soils. The inventive pile Foundation consists of grillage and hollow piles with a through vertical slits, which are provided with vertical ribs core, trapezoidal plate with centering element, a ring with a vertical protrusion and located on the inner surface of the pile stops unilateral action. The core is located in the cavity of the pile coaxial and his side wound in the slots, the lower end face of the core is supported by a larger base plate, and a ring located on the outside lower part of the core and its edges also wound in the slots of the piles. The outer cylindrical shell is rigidly fixed to the edges of the core. Positive effect: the elimination of negative influence of friction, which leads to an increase of the bearing capacity of the Foundation. 7 Il.

The invention relates to the construction, in particular to pile foundations, built on self-compacting (sagging, loose, alluvial) soils.

Known pile, including the trunk, mounted inside the soil well with a gap relative to its steamie the bottom layer of loose easily compressible material and the top of a cement-sandy solution, and the barrel portion of the length equal to the thickness of the upper layer of fill, provided with antifriction coating [1]

The disadvantage of this pile is the fact that the negative friction on the pile from the ground when the drawdown remains high, which does not provide sufficient reliability.

The closest technical solution of the invention is a pile foundations of buildings, structures, including piles, each of which has an outer cylindrical shell, placed with a gap, and the grillage, executed at the height of the composite of the upper and lower parts, between which is a layer of antifriction material, and a cylindrical shell piles are rigidly connected to the lower part of the grillage and executed by the length of the lesser depth of the active zone of the soil, and the trunks of piles rigidly connected with the upper part of the grillage, each pile is equipped posted on its lateral surface of the rollers in contact with the inner surface of the corresponding cylindrical shell [2]< / BR>
The disadvantage of this Foundation is the inability to maintain the constant position of the Foundation as the Foundation is fixed on the pile will be moved simultaneously with the movement of the piles upon impact procedue m is to give a pile Foundation, that helped was to ensure a stable position of the grillage when subsidence, and to increase the bearing capacity of the Foundation.

The proposed pile Foundation includes the grillage and pile with an outer cylindrical shell. The pile is made hollow with a through vertical slots in the form of individual segments and provided with vertical ribs core, trapezoidal plate with centering element, a ring with a vertical protrusion and located on the inner surface of the pile stops unilateral action. The core is located in the cavity of the pile coaxial and his side wound in the slots, the lower end face of the core is supported by a larger base plate, and a ring located on the outside lower part of the core and its edges also wound in the slots of the piles. The outer cylindrical shell is rigidly fixed to the edges of the core.

In Fig.1 shows a pile Foundation, General view; Fig.2 section a-a in Fig.1; Fig.3 section b-B in Fig.1; Fig.4 trapezoidal plate; Fig. 5 section b-b In Fig.1; Fig.6 section G-G in Fig.5; Fig.7 section D-D in Fig.5.

Pile Foundation cutting subsiding column 1 and based on the strong multiformula trapezitinae plate 5 with the centering element 6, the ring 7 with the vertical tabs opened in the slits. Pile provided with coaxially placed core 8 having vertical ribs 9, which are slotted piles 3.

In the area of manifestation of subsidence deformations to the ribs of the core 8 is rigidly fixed to the outer cylindrical shell 10, the height of which is less than the total possible drawdown. Ring 7 provided with vertical projections 11, which rise above the surface of the plate and serve as stoppers when installing hollow with a through vertical slots in the form of individual segments of the pile 3, on the inner surface of which is mounted recessed in the body of the pile stops 12 unilateral action.

Pile Foundation is set as follows.

In a pre-drilled until thick, neprosedsego soil 2 well established trapezoidal plate 5 small base down, which drops the ring 7 and is installed with a clearance segment hour pile 3, the slots which infest the protrusions 11 of the ring 7.

The inner cavity of the pile 3 is installed core 8 with vertical ribs 9,missing the slot 3 piles. While the total height of the core 8 is equal to the greatest wasmanni drawdown.

Pile Foundation works in the following way. When drawdown from the negative forces of friction of the outer cylindrical shell 10 will begin to move together with the surrounding shell primer 1. Rigid connection of the outer cylindrical shell 10 through the vertical ribs 9 core 8 will provide movement and core down. The core will start to move trapezoidal plate 5, and is available on the inner side of the hollow pile 3 stops 12 unilateral actions, freed from contact with the core 8, under the action of the spring 13 will be released from pota, adopting a horizontal position, lock the core 8 in the new position, preventing its reverse bias. Such stops unilateral action is set equal intervals along the entire height of the pile on the greatest movement of the core. Stops unilateral action in cooperation with the core will prevent the sediment pile cap 4, providing stability to its design position.

Declare pile Foundation eliminates the negative influence of friction, which leads to an increase of the bearing capacity of the Foundation, i.e. provides the reducing and preventing precipitation of buildings.


 

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Pile foundation // 2056476
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