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.


Same patents:

Pile foundation // 2056476
The invention relates to the construction, in particular to pile foundations, built on self-compacting (sagging, loose, alluvial) soils

The invention relates to the construction and associated with the construction of earthquake-resistant buildings or structures

The invention relates to techniques for protection from damage of structural elements of buildings, structures, including bridges, viaducts, foundations of vibrating screens, presses, as well as protection of people working in conditions of shocking machines from vibroblade

The invention relates to the construction and can be used at the device and strengthening of foundations in complex engineering-geological conditions predisposed to the manifestation of the refusal grounds under the influence of anthropogenic factor

The invention relates to the construction and the execution of the foundations of seismic buildings and structures

The invention relates to the construction in seismic areas

The invention relates to earthquake-resistant construction and can be used in the construction of foundations of buildings constructed in seismic areas

FIELD: building, particularly for erecting pile-plate foundations for industrial buildings and structures, for instance for main buildings of heat power plants.

SUBSTANCE: method involves arranging drilled cast-in-place pile, grouting plate grillage and installing antivibration mounts. Anchorage reinforcement is placed in pile heads and arranged along marked building axes. Anchorage reinforcement is then grouted and resilient antivibration mounts are installed at pile heads. Resilient antivibration mounts are fixed in plane on anchorage reinforcement with the use of fasteners so that antivibration mounts may perform restricted movement. Installed on antivibration mounts is rigid metal foundation frame of upper building in which anchoring reinforcement for securing skeleton of building to be erected is installed. Reinforcement rods and supply lines are inserted in process orifices formed in foundation frame beams and frame is grouted to form panel grillage.

EFFECT: reduced work content, increased simplicity and speed of bearing grillage frame erection; improved building stability.

9 cl, 5 dwg

FIELD: building, particularly frame structures for civil and industrial buildings to be erected mainly on sinking territories or territories to be developed.

SUBSTANCE: method for connecting eccentrically loaded column with foundation by fixing thereof in orifice formed in foundation involves forming composite multi-stepped foundation having central, medium and outer steps and through wedge-like orifices made in each step, wherein orifices taper downwards with cone angle of 1/10 to 1/5 (5.7 - 11.3o) and each step and lower column end are also wedge-like and have cone angles of 1/12 - 1/6 (4.8 - 9.5o), steps are inserted one into another and wedge-like column end extends into central orifice of central foundation step; tightly installing pair of force mounting wedges in gap between wedge-like column end and foundation, wherein each mounting wedge comprises two levers pivotally connected by the first ends to change cone angle of wedge and to regulate column verticality; securing jack communicating with hydraulic pulsing pumping plant to one lever; filling gap between foundation steps and gap between wedge-like column end and foundation with solid powder material, particularly with crushed granite with particle dimensions of 5 - 10 mm; covering upper part of central orifice of central step with concrete plug of 40 - 50 mm thickness along column perimeter; arranging centering pads on concrete plug symmetrically about eccentrically loaded column; installing pair of jacks on centering pads; securing mounting device formed as split terminal including L-shaper rests pressed to column and connected one to another by means of two bars and pins with stressing nuts, wherein jack pistons cooperate with L-shaped rests from below to maintain design position of eccentrically loaded column and to solidify powder material in gap between column tip and foundation orifice wall.

EFFECT: provision of straightening column position relative foundation without connection unit damage; increased reliability of anchoring eccentrically loaded column in foundation.

4 dwg

FIELD: anti-seismic protective units for buildings and structures.

SUBSTANCE: proposed protective unit includes many modules laying in one plane at contact with each other; each module consists of two identical parts made from rigid plastic material and connected in center by means of silent-block; used automobile tire is placed between them, thus forming deformable elastic chamber filled with granule-like elements made from plastic material; granule-like elements possess hydraulic properties.

EFFECT: possibility of weakening, dissipating and dampening seismic wave.

2 cl, 4 dwg

FIELD: construction, particularly to construct buildings and structures in earthquake zones or special-purpose objects.

SUBSTANCE: multistory earthquake resistant building includes upper spatially stiff stories defined by columns, crossbars, floor panels and well panels; ground or the first floor formed of kinematical posts with rounded upper and lower edges so that posts may perform stable swinging during earthquake along groves. The grooves are formed in upper framing members created as a part of floor panel or ground floor and in lower framing members made as a part of foundation bearers. Rounded post edges have variable curvature acting as lockable and releasable links and limiting large horizontal movement along with retaining post capacity to reduce seismic forces affecting on buildings and structures during earthquake. Kinematical posts are monolithic or composed of several parts without embedded members. Horizontal cross-section of each kinematical post define star with 3, 4, 5, 6, 7, 8, 9 … n points, wherein unrestricted number n of star points create stiffening ribs.

EFFECT: increased efficiency, strength and stability of the support under broad earthquake frequency spectrum.

9 dwg

FIELD: construction, particularly to erect buildings and building structures on permafrost ground, which may thaw during building or building structure usage.

SUBSTANCE: method involves digging-out pit; filling the pit with nonfrost-susceptible material; introducing reinforcing members in the nonfrost-susceptible material and mounting foundations. The reinforcing member is made as rigid reinforced concrete panel arranged in compacted nonfrost-susceptible material layer. Distance between foundation bottom and panel top is selected to provide uniform load transmission from the foundations to the panel. Upper panel surface is formed of heat-insulation material and sloped parts inclined from panel center to panel periphery are created. Panel rigidity is related with thawing permafrost ground deformation extent.

EFFECT: reduced building deformation caused by non-uniform deformation of thawing permafrost ground.

1 dwg

FIELD: foundations for special purposes, particularly foundation platforms connected to tanks.

SUBSTANCE: reinforced concrete beams or trusses are installed between reinforced concrete panels of upper and lower belts of three-dimensional platform. Reinforced concrete beams or trusses have inclined upper face and are connected one to another in center by monolithic rigid core. The reinforced concrete panels have trapezoid or segmented shape in plane. Reinforced concrete beams or trusses with key connections are located in parallel between reinforced concrete panels of upper and lower belts. Tank walls and coverings have arched structure shaped as prismatic polyhedron inscribed in cylindrical surface defined by square parabola or another curve with generatrices parallel to beams or trusses of three-dimensional foundation platform.

EFFECT: increased structural efficiency due to increased reliability of three-dimensional foundation platform, reduced metal consumption and labor inputs.

2 cl, 9 dwg

FIELD: building, particularly pile foundations including floating piles.

SUBSTANCE: method involves injecting hardening mortar via injectors driven in ground in area between the piles and at pile ends for depth exceeding 1-2.5 m, wherein the injectors are spaced 1.5-2.0 meters apart. The hardening mortar pressure gradually increases. The hardening mortar is injected up to creation of hydraulic fracture cavities having 1.5-2.0 m radii around each injector. Then the injection operation is preformed under constant pressure of 2-10 atm to consolidate and reinforce ground, compress the piles to multiply load-bearing capacity thereof by 1.5-2 times.

EFFECT: increased load-bearing pile capacity due to increased side friction and head resistance.

3 cl, 1 dwg

FIELD: tire utilization and use in building, particularly to erect earthquake resistant foundations for low buildings, to construct road beds in marshlands and to erect mudflow control structures of used tires.

SUBSTANCE: method involves laying tires one upon another in several layers so that tread tire parts are in close contact with each other; connecting the tires by inserting fastening members in tire interiors. Tires are grouped in the first tire layer and then perforated strips are installed in interior of each tire. Number of strips depends of number of adjacent tires. Perforated strip orifices are spaced apart a distance corresponding to tire layer thickness. Then adjacent tires are pulled together by means of fastening pins having flat non-threaded parts. The pins are located from top and bottom of tire sides. Then next tire layers are laid and connected in the same way to provide stack having necessary height. Spaces defined in tire stacks and between the tires are filled with filler.

EFFECT: increased reliability of tire connection.

2 dwg

FIELD: building equipment, particularly foundations for sinking or earthquake territories.

SUBSTANCE: method involves determining active vibration zone and surface length wave; creating vertical screen between active vibration zone and building or building structure to be protected as at least one well row, wherein the wells are drilled for depth equal to at least 0.5 of surface wave length and straight line passing from any active vibration zone point to extreme points of vertical screen does not cross building or building structure foundation; creating additional screen under building or building structure base as a number of wells drilled in accordance with uniform grid pattern for length of not more than vertical screen depth. Wells forming vertical and additional screen are treated with consolidating solution.

EFFECT: increased efficiency of building or building structure protection against vibrations or seismic inflexibility of building and building structure base ground.

2 dwg

FIELD: construction, particularly to erect heavy structures on compressible ground in seismic zones.

SUBSTANCE: method involves driving piles; connecting members formed as inversed cups to pile heads; connecting pile heads with slab-like raft. In the case of foundation construction in seismic zones plies having different lengths are used. Long piles are arranged along longitudinal and transversal axes of load-bearing walls. Short piles are driven between main ones. Reinforcement bars of short piles are introduced in raft body for length equal to bolting length necessary to create rigid joints after raft concreting. Before raft concreting members made as inverted cups are put on long pile heads to create gap with thickness equal to half of immersion depth admissible for structural layout of building under construction. Foamed polystyrene layer having thickness equal to gap thickness is formed on upper ends of long piles.

EFFECT: extended technological capabilities due to increased building structure load transferred to structure foundation and be taken by slab and decreased structure immersion.

2 dwg