(57) Abstract:The invention relates to the field of construction and can be used for dipping precast concrete piles of solid section in the ground by way of driving. The purpose of the invention to increase the bearing capacity of piles without complicating the technology of its manufacture in the factory. Driven pile includes solid reinforced concrete tube with a retractable bottom and placed inside a wedge-shaped element. Wedge-shaped element is immersed in the ground, on the edge of the wedge-shaped element down the pile shaft until full soprikosnovenija, with the locking pins welded to the mortgage loan details, located in the upper part of the edge of the wedge-shaped element that is fixed in the tube of the pile shaft. Next, the driving of piles percussion mechanism according to standard technology. After receiving the failure is fixed, the position of the piles relative to the ground level and it is the distance that indicates at what depth should immerse the head of the piles. Due to increased shock loads transverse grid will not withstand the stress concentration that will lead to their rupture. This will immediately lead to the formation of cracks in vertical and Gorev within the grooves. Under load the lower part of the stem will be moved apart, forming two lobes seeking to transition from vertical to horizontal. 3 Il. The invention relates to the execution of driven piles and allows to increase the carrying capacity while simplifying the design.The closest to the technical nature of the claimed invention is an anchor pile (ed. St. SU N 1430464, km, E 02 D 5/54, 1988), including a hollow barrel, the lower end of which is made with slits forming the rotary blade. In the cavity of the trunk mounted inertial mass in the lower part of which is a closed cylindrical chamber. The camera is placed a piston, a piston rod passing through a groove in the base of the chamber and is connected with a massive wedge which is placed between the blades.The specified well-known and inventive design has the following similar significant features. In both cases, the increase in the area of the piles is provided by sliding the lower part of the trunk; one of the elements contributing to it is a wedge placed between the sliding vanes.The fundamental difference between the claimed design from the well-known prisoners ' what about the inner cavity of the pile, with the piston and rod are used to turn the blades. Therefore, the pile can only be performed from metal, which is expensive. In addition, the principal difference is in the purpose of piles: a well-known intended for the, as expected for a device of piers or Foundation, i.e., the first works on pulling, and the second, on the dive.In Fig. 1 shows a pile, a longitudinal section of the pile in the soil before a failure; Fig. 2 a longitudinal section of the pile after driving; Fig. 3 is a cross-section of the lower end of the pile.Driven pile includes solid reinforced concrete tube 1 with a retractable bottom and placed inside a wedge-shaped element 2. In the upper part of the edge of the wedge-shaped element has embedded plate with welded onto the two metal locking pins 3 on the ends.The lower part of the wedge-shaped element has the shape of a quadrangular pyramid, similar to the edge of a typical reinforced concrete piles of solid section, which facilitates the driving of piles into the ground.The lower part of the pile shaft in the form repeats the upper part of the wedge-shaped element with corner notches equal to the angle of the wedge.For fixing the pile shaft relative to clinoid is passed on the locking pins 3.To create a stress concentration in the places of the future section of the lower sliding part of the trunk is made from three pairs of triangular grooves 5 and 6, which are arranged in two mutually perpendicular planes. To ensure the safety of sliding the lower part of the trunk when driving before a failure in the collection are reinforcing mesh indirect reinforcement 7.To prevent development of cracks in the concrete at the time of cutting in the area of the triangular grooves are grid indirect reinforcement 8 and the clamp 9.The device operates as follows.Wedge-shaped element 2 is lowered into the pre-prepared the soil well so that the entire bottom part of it sank into the ground. On the edge of the element is lowered the barrel 1 of the piles to their direct contact, with the locking pin 3 is fixed in the tube 4.Next, the driving of piles percussion mechanism in accordance with the standard process map for driving precast concrete piles of square or rectangular cross-section. After receiving the failure is fixed, the position of the piles relative to the ground level and from this level on the pile is delayed up to the distance "l", taking into account the e grid 7 will not withstand the stress concentration, that will lead to their rupture. This will immediately lead to the formation of cracks in 6 vertical and 5 horizontal grooves.Due to the presence of transverse grids 8 and clamps 9, cracks will increase only within the grooves. Under load the lower part of the stem will be moved apart, forming two lobes seeking to transition from vertical to horizontal.The final position, which will occupy the blades will depend on the value of "l" pile into the ground when driving over failure.The proposed precast pile allows to increase the carrying capacity, without complicating the design and manufacturing technology in the factory. Driven pile, comprising a barrel with a retractable lower part located inside of the last wedge-shaped element, the shape of which repeat the internal shape of the bottom of the barrel, wherein the lower sliding part of the trunk is made from three pairs of triangular grooves on the surface and located in the area of additional clamps and steel meshes, and wedge-shaped element is made with the bottom part in the form of a quadrangular pyramid and is provided with two retaining xiaoxie pins.
FIELD: building, particularly for constructing foundations of various building structures.
SUBSTANCE: bearing pile comprises head, rod and tip fixed to embedded rod part by embedded member. The tip is formed of thermoplastic concrete and has electric heater located inside the tip. Electric heater heats the tip after driving thereof into ground as far as it will go to obtain softening temperature of 80-150°C. Then the pile is fully driven in ground. Electric heater wires are placed in tube in longitudinal rod direction and brought outside under pile head for connection thereof with electric power source.
EFFECT: increased load-bearing pile capacity due to provision of widened pile tip support area.
2 cl, 5 dwg
FIELD: bulkheads, piles, or other structural elements specially adapted to foundation engineering, particularly concrete or concrete-like piles cast in position with enlarged footing or enlargements at the bottom of the pile.
SUBSTANCE: reinforcement 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.
EFFECT: increased uniformity of reinforcement distribution over pile bottom, improved compression and stretching force damping, decreased labor inputs and material consumption.
36 cl, 25 dwg
FIELD: construction, particularly bored piles with enlarged footing or enlargements at the bottom of the pile.
SUBSTANCE: method involves drilling well; filling the well with concrete mix and non-detonating composition including fuel and oxidizer; igniting non-detonating composition by applying low-voltage pulse to electric igniter and combusting non-detonating composition in deflagration regime to create camouflet void with following concrete mix hardening. The fuel is solid hydrocarbon selected from polyethylene, polypropylene and polystyrene. The oxidizer is sodium or potassium chlorate. Non-detonating composition is supplied in well before well filling with concrete mix.
EFFECT: decreased pile production time due to accelerated concrete mix hardening and improved produced pile quality.
SUBSTANCE: invention refers to building, in particular, to strengthening of the bases under the basements. The way of strengthening of the basement erected on waterlogged priming coats and near to the located constructions includes supply of early strength concrete in the metal tubing established in driven wells, drilled through a basic part of the basement and a ground. Pipes are made with the welded boots, in pipes lower explosive charges and fill with early strength concrete, then the explosive charges are detonated, remaining hollownesses of driven wells and pipes are filled with early strength concrete.
EFFECT: provision of reliable strengthening of the basements erected in waterlogged priming coats and near to located constructions; increase of load-carrying capacity.