Method to increase bearing capacity of bored pile. RU patent 2509842.
 Method to arrange base of structural foundations / 2496944Method to arrange a base of structural foundations includes arrangement of a foundation on a natural soil base, and then reinforcement with contoured vertical driven piles of lower diameter, arranged outside the contour of the foundation, at the distance from its outer faces, of a certain length and at the identical distance from each other. At first the reinforced base of the foundation is formed, for this purpose contoured piles are submerged in several rows, for a design depth in accordance with the pile field scheme accepted in the project, arranging them outside the contours of the foundation. Then the bearing piles are submerged and arranged within the contour of the foundation foot or reaching outside the contours of the foundation foot by the value that is less or equal to 0.5d (where d - side or diameter of the cross section of the pile). On top of the bearing piles there is a buffer layer, dimensions of which in plan exceed length and width of the foundation foot at the level of elevation of the pit bottom by the value that is more or equal to 2d, and its thickness is more or equal to 0.5d from sand of at least medium size or crushed stone from solid rocks. The section of the pit bottom within the contour of location of bearing piles is planned to the design elevation, and a mud slab is arranged, with the thickness of 10 cm, at the same time width and length of which exceed the width and length of the foundation foot by the value d. Above the mud slab they arrange hydraulic insulation, and the foundation is erected. The minimum distance between longitudinal axes of contoured and bearing piles is determined in accordance with the given dependence. |
 Design of foundation for structure or building and method of its manufacturing / 2453657Design of a foundation for a structure or a building, in which one or more supports of the structure or building are installed on piles placed into the ground. The design comprises a pile grid, including two or more piles to install a support, and one or more beams, which are placed on two or more piles of the piled grid, and where a support is installed to transfer load developed by a support, to piles of the pile grid by means of beams, substantially, by bending forces. It includes a concrete monolith poured after installation of piles, beams and a support into the space between piles to fix a support. |
 Erection method of building structure / 2436897Erection method of building structure consists in the fact that in foundation of framework type there used as collar beam (beam) of framework is a wall of the building. For that purpose, drilling of wells 1 for piles is performed below the freezing level, hollow boxes 2 for pile grouting are installed in the wells, sand is filled and surfaces are levelled with the required accuracy, installation of foundation panels 3 and wall panels 4 on panels 3 is performed. Binding of protruding bars 5 of wall panels 4 and installation of vertical reinforcement 6 into boxes 2 is performed; after that, binding of installed reinforcement 6 with protruding bars 5 of wall panels is performed; then, the cavities formed with hollow boxes for piles and service cavities formed either with edges of wall panels 4 and add-on components, or with cavities made inside wall panels 3 are grouted. |
 Method for erection of slab-pile foundation / 2390609Invention relates to construction and may be used in erection of slab-pile foundations on compressible ground. Method for erection of slab-pile foundation includes development of mine pit bottom in soil for reinforced slab, erection of vertically reinforced construction elements, combination of slab reinforcement and construction elements and filling with concrete. In slab along contour holes are arranged in several rows and in staggered order, through which wells are drilled for construction elements of vertical reinforcement, for instance for injected or drilled piles. Then after reinforcement has been installed into wells, it is filled with concrete, gap is left between slab and pile, which equals 1/3 of permissible value of building settling. After settling of slab, protruding reinforcement of slab and piles are combined, and holes in slab are filled with concrete. |
 Multistory building with slab-pile foundation / 2386753Invention is related to the field of construction, in particular to multistory buildings with slab-pile foundations. Multistory building with slab-pile foundation comprises bearing walls and ceilings. Each of axes in the first row of piles is arranged on the side of building facades to its centre relative to edge of building transverse walls with displacement defined by given dependence, besides piles nearest to line passing through centre of building parallel to its facades, are installed relative to this line with smaller pitch. |
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 Method for erection of slab-pile foundation / 2379425Method for erection of slab-pile foundation includes arrangement of piling field and mattress. Piles are submerged along foundation perimetre, and mattress is produced of two parts - external one, having upward ledges and directly resting on piles, and internal one - with downward ledges, which rests on the external part. At the same time as rated settlement is achieved, external and internal parts of mattress are rigidly joined, thus providing for combined operation of slab-pile foundation. |
 Method for construction of pile piled-slab foundation / 2364684Invention is related to construction of buildings and structures that perceive static, dynamic horizontal and drawing loads. Method for construction of piled-slab foundation includes submersion of piles, installation on elements in the form of reverse glasses on middle pile heads, combination of pile heads by foundation grill in the form of slab. Foundation grill slab is made of extreme plates and central plate, besides, extreme plates are combined with downstream anchor piles, which perceive horizontal and drawing dynamic forces. Anchor piles are arranged with different length that increases to central plate. Reverse glasses are placed on heads of middle long piles with creation of gap equal to half of setting permissible for specific scheme of erected structure, which makes it possible in process of setting to combine central plate with extreme plates, in which deepenings are arranged for installation of central plate protrusions. Level of extreme and central plates are fixed by abutments attached to building. |
 Foundation for high-rise buildings / 2357046Invention is related to construction, in particular to erection of pile foundations, and may be used in erection of high-rise buildings that transfer high vertical and side loads on foundation. Foundation for high-rise buildings comprises crossing piles and foundation grill. Piles are connected pairwise with equal pitch by their upper and lower ends so that they create rigid spatial structure in the form of single-cavity rotational hyperboloid, upper largest circle of which is formed with connection points of upper ends of piles, which are fixed in foundation grill, and lower largest circle of rotational hyperboloid is formed by connection points of lower pile ends. |
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 Protective case for bridge pier grillage and erection method thereof / 2263176Protective case comprises composite horizontal three-dimensional blocks having orifices in central parts thereof and fastening members which connect the blocks one to another. Each orifice is formed of metal member, which defines cavity for pile installation. Lower block is provided with pile guiding cells arranged in lower part of block cavity. The metal members have welded joints. Method of grillage erection involves assembling case of building members, namely blocks, which are lowered and laid one onto another along guiding means; connecting blocks one to another as they are laid with fastening members. The case is assembled above water body surface and then is lowered in water to design level. Vertical piles previously driven in water body bottom through guiding cells of lower block are used as the guiding means for case lowering in water. |
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 Method for slab-and-pile foundation erection / 2305154Method involves forming piles; creating grillage slab so that gaps are created between the slab and each pile; connecting the piles with grillage. After slab forming basement and building superstructure are serially erected. Piles are connected to grillage slab after soil settlement under foundation by supplying concrete mix through openings made in basement walls to grout gaps left around each pile and to form uniting reinforced concrete layer. |
 Reinforcing device for pile bottom reinforcement to create pile foundation with the use of foundation pile and method for foundation pile driving and pile bottom reinforcement / 2310722Reinforcement device is used to erect pile foundation with the use of foundation pile having at least one longitudinal cavity. Reinforcing device comprises a number of joined reinforcement members hingedly connected with central annular member located so that reinforcement device may be collapsed during installation and erected during device usage. Reinforcement device is connected to pile by at least one member working in tension. Foundation pile reinforced with the use of said device and method for foundation pile driving and pile bottom reinforcement are also disclosed. |
 Pile foundation and method of pile foundation construction / 2315837Pile foundation comprises composite piles driven in ground and grillage arranged about the piles. The piles include a number of sections provided with joint members at section ends. The pile sections are made as pile modules having the same standard dimensions. Number of pile modules and/or parts thereof in each composite pile depends on pile driving depth. Pile driving depth is selected to provide load-bearing capacity of composite pile in ground not exceeding effective load to be applied to composite pile, based on axial composite pile material compression strength. Method for pile foundation erection involves driving composite pile in ground by connecting next section to previous one immersed in ground; driving next pile section in ground for depth selected from ground load-bearing capacity; cutting-away projected upper pile section part; moving said cut pile section in ground in area of next pile driving in ground to use the cut pile section as the first pile section to be driven in ground; forming pile grillage. |
 Foundation / 2320820Foundation comprises bored piles connected with each other by mattress. Bored piles are connected with each other by means of arch holes drilled with the use of percussion means and filled with fibrous concrete. |
 Method for pile-and-mat foundation erection / 2321703Method involves arranging piles and connecting the piles with mat. Holes are previously drilled in ground. The holes are provided with horizontal cavities by means of jet geotechnological operation. Then the holes are filled with fibrous concrete based on basalt fiber. Drilled holes are filled with concrete and reinforcing cage is inserted therein. |
FIELD: construction.
SUBSTANCE: method to increase bearing capacity of bored piles consists in the fact that each bored pile is made of two elements; the lower part - from loose working substance (crushed stone, slag and similar material) interacting with a soil base, besides, the foot of the working substance lies deeper than the depth of soil freezing, the upper part of the pile is erected as solid, reinforced concrete with a cross-shaped head. The solid reinforced concrete grill is erected, and the whole structure is partially erected. Pairs of jacks-pulsators of double reciprocal action are mounted onto cross-shaped heads, their plungers are rested against the structure grill. Pairs of jacks-pulsators are connected by oil lines with a pulsating pump station. From the panel, jacks-pulsators are switched on, and pulses are applied to press the upper solid part of the pile deep down, using the foot of the solid pile, the working substance is pressed into loose soil base, the form of the working substance contact surface is transformed with the soil base into a drop-like, pear-like shape, pressed with the surface of the contact of the working substance of the weak soil base under it and around it, previously they stress, seal and strengthen these weak loose zones of the soil base, to the rated value of force. Using the manometers, they monitor pressure developed by a pair of jacks-pulsators, the bearing capacity of each pile is increased several times. Strength and deformability of the zone of contact of the soil base with the working substance is balanced. The bearing capacity of piles is balanced in respect to each other, and uneven subsidence is prevented, and the structure list is eliminated.
EFFECT: increased bearing capacity of bored piles during construction, elimination of uneven subsidence of separate piles and the whole structure.
1 ex, 4 dwg
The alleged invention relates to the construction, in particular to the device of pile foundations of buildings and facilities erected in cramped conditions.
For similar accept bored pile, which is performed by filling cavities well monolithic reinforced concrete [1]. The disadvantage of analog is much smaller carrying capacity of bored piles compared to score, as well as large differential settlement of each of the piles and the entire structure.
Also known foundations in virubuvannya the pits with a wider base [2]. The main disadvantage of such a Foundation is that it cannot device close to the buildings of the old buildings, due to hazardous impact of significant dynamic fluctuations on building constructions of an existing building. Known foundations jet engines[3, 4, 5, 6, 7, 8, 9].
For the prototype will accept patent RU №2230157 [6].
The technical result of the invention is increasing the carrying capacity of bored piles and exclusion uneven subsidence separate piles and the entire structure.
The technical result by way of increasing the bearing capacity of piles that are implemented by the fact that what each of bored pile perform two elements: the lower part is the bulk of the working fluid (crushed stone, slag and similar material) interactive, ground base, and the top part piles building is monolithic, reinforced concrete with a Phillips-head. The sole working body lies deeper depth of soil freezing.
How is that erect monolithic, reinforced concrete grillage and partially erect the structure.
Mounted on the cross-shaped pile heads pair of jacks-of pulsates double reciprocating, rests their plungers in the pile Foundation construction.
Pair of jacks-of pulsates, connect the oil lines with pulsating pumping station with remote control include jacks-pulsators and pulses presoviet top monolithic piece piles deep.
Presoviet fifth monolithic piles working body in loose soil Foundation, transform the shape of the surface of contact of a working body, ground base in a teardrop-shaped, pear-shaped form.
Compresses the contact surface of a working body weak subsoil under him and around him, pre-stress, consolidate and strengthen these weak loose zone soil Foundation, the designed power.
The control gauges developed by a pair of jacks-of pulsates pressure, several times increase the carrying capacity of each of the piles. Align the strength and deformation of the contact zone of the soil Foundation with a working body, align the bearing capacity of piles in relation to each other and prevent uneven sediment, and exclude roll facilities.
Figure 1 shows a bored pile up process indentation pre-stressed reinforced concrete pile shaft, figure 2 - after pressing, the preliminary tension of the pile shaft; figure 3 - bored pile with specific sizes to push; figure 4 - bored pile for a concrete example, after a push.
The technological sequence of construction of bored piles is the following. Drilling machines, or special devices form the bore diameter and depth. In the well mechanized fall asleep rubble 1, the layer height is determined by calculation, the bottom layer of crushed stone must be in the host layer, below the depth of soil freezing 2. On top of the rubble opirajut monolithic reinforced concrete pile shaft 3, which should ensure the durability and resistance of piles in a weak ground 4. Reinforced concrete pile shaft is being built before the Foundation of the above-ground part of the building 5. Tip 6 the top of the pile shaft perform cross to install a pair of jacks-of pulsates 7, providing a preliminary tension of the whole system, pushing the upper monolithic part of the pile 3. Under the impact of efforts pair of jacks-of pulsates 7, the magnitude of which is controlled standard gauges, form broadening the bottom of the pile of rubble 8, compacted adjacent supporting layer of soil 9, that regulate the carrying capacity of bored piles, regulate its preliminary voltage of indentation concrete pile shaft 3. This increases the diameter of the bulk of the working fluid 8 under the sole and regulate the transfer of efforts from monolithic ferro-concrete piles 3 bulk of the working body 8. Condense weak subgrade 2 under the intrusion, similar to the way described in the patent [6].
An example of a concrete realization
1. Calculation of bored piles without the push of reinforced concrete tube 2. Figure 3 shows the main parameters of bored piles.
The calculation is conducted by the bored piles with a diameter of ⌀500 mm and a length of 5 m
The carrying capacity F d bored piles defined according to [1]:
F d =γ c (y cR ·R·A+uΣγ cf f i ·h i ).
For our case:
f i =0,039 MPa;
h i =100 cm;
R=0,65 MPa;
when S r =0,85<0,9; γ c =0,8; γ cR =1; γ cf =0,6;
A = 50 2 x PI 4 = 1963 with m 2 ;u=p·50=157 see
Resistance of the ground on the side of the pile in the bulk soil is not considered. For the depth of the bottom end of the piles h=5 m and J L =0,3 have R=0,65 MPa.
The average depth of the location of the layer of soil to account for the resistance through the side of d=4.5 m, f i =0,039 MPa.
Bearing capacity of piles:
F d=0,8(1·0,65·1963+157·0,6·0,039·100)=1314,7 Mr..
2. Calculation of bored piles with wider base. Figure 4 shows the main parameters of bored piles with wider base.
After pressing bored piles to a depth of 1 m at the base of the pile is formed by the intrusion of rubble, with increased diameter in terms compared to monolithic part of the pile. When filling the well with gravel to a height of 1,2 m volume of crushed stone is:
V=A·h=0,19625·1,2=0,235 m 3 .
The radius of the intrusion when a given volume of crushed stone is equal to:
r = V x 3 4 x PI 3 = 0,235 x 3 4 x PI 3 = 0,38 mThe area of broadening:
A=PI·r 2 =p·38 2 =4536 cm 2 .
According to [1] the piles immersion pushing in pre-drilled leader wells with the depth of the ends of the piles of at least 1 m below the bottom of a well belong to the category of piles, arranged without dredging. The carrying capacity F d piles buried without dredging, defined according to [1]:
F d =γ c (y cR ·R·A+uΣγ cf f i ·h i ).
γ c - coefficient of working conditions piles in the ground taken γ c =1;
γ cR =1,0 coefficient conditions of the soil under the lower end of piles;
R - design ground resistance under the broadening. For d=6 m and J L =0,3 R=3,05 MPa;
A=4500 cm 2 - area of broadening;
u=157 cm the outer perimeter of the cross-section of piles;
f i =0,039 MPa is calculated the resistance of the i-th layer of the bottom soil on the side of the pile;
h i =100 cm thickness of the i-th soil layer in contact with the side surface of the pile;
γ cf =0,5 - coefficient conditions of the soil on the side.
Then:F d=1(1·3,05·4500+157·0,5·0,039·100)=14031 Mr.
n = F d F = 14031 1314,7 = 10,7 R and C andThat is, during indentation bored piles, with a layer of gravel in the bottom on depth not less than 1 m, and its carrying capacity is increased more than in 10 times (in comparison with the prototype).
Compared to the above analogous to the technical result is achieved by the fact that bored pile is made of double-layer, the bottom layer which consists of rubble, and the top layer is a reinforced concrete tube, which is based on the above-ground part of the building, at the indentation of the pile shaft is formed broadening of the lower layer of crushed stone and compacted area carrying layer of soil, located near considered piles, resulting in changes calculations of characteristics of the bearing capacity of bored piles is increased in several times.
Literature
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The way to increase the bearing capacity of piles, namely, that each of bored pile perform two elements: the lower part is the bulk of the working fluid (crushed stone, slag and similar material), interactive, ground base, with sole a working body lies deeper depth of soil freezing, the top of the pile constructing monolithic, reinforced concrete with a Phillips-head, erect monolithic, reinforced concrete grillage and partially erect the structure, mounted on a cross-shaped pile heads pair of jacks-pulsators double reciprocating, rests their plungers in grillage facilities, a pair of jacks-of pulsates connect the oil lines with pulsating pumping station with remote control include jacks-pulsators and pulses presoviet top monolithic piece piles deep presoviet sole monolithic piles working body in loose soil Foundation, transform the shape of the surface of contact of a working body, ground base in a teardrop-shaped, pear-shaped, compresses contact surface of a working body weak subsoil under him and around him, pre-stress, consolidate and strengthen these weak loose zone soil Foundation to project power, control gauges developed by a pair of jacks-of pulsates pressure, several times increase the carrying capacity of each of the piles, level of strength and deformability of the contact zone soil Foundation with a working body, align the bearing capacity of piles in relation to each other and prevent uneven sediment, and exclude roll facilities.