EP0481079A1 - Procede et outil de production d'un pilot - Google Patents

Procede et outil de production d'un pilot Download PDF

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Publication number
EP0481079A1
EP0481079A1 EP90910974A EP90910974A EP0481079A1 EP 0481079 A1 EP0481079 A1 EP 0481079A1 EP 90910974 A EP90910974 A EP 90910974A EP 90910974 A EP90910974 A EP 90910974A EP 0481079 A1 EP0481079 A1 EP 0481079A1
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EP
European Patent Office
Prior art keywords
pile
building material
depth
discharge
area
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP90910974A
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German (de)
English (en)
Other versions
EP0481079A4 (en
EP0481079B1 (fr
Inventor
Alexei Leonidovich Egorov;
Gennady Nikolaevich Gavrilov
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
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Individual
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Filing date
Publication date
Priority claimed from SU894707757A external-priority patent/RU1688790C/ru
Priority claimed from SU894716482A external-priority patent/SU1699360A3/ru
Application filed by Individual filed Critical Individual
Priority to AT90910974T priority Critical patent/ATE94929T1/de
Publication of EP0481079A1 publication Critical patent/EP0481079A1/fr
Publication of EP0481079A4 publication Critical patent/EP0481079A4/de
Application granted granted Critical
Publication of EP0481079B1 publication Critical patent/EP0481079B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/11—Improving or preserving soil or rock, e.g. preserving permafrost soil by thermal, electrical or electro-chemical means
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/02—Improving by compacting
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/02—Sheet piles or sheet pile bulkheads
    • E02D5/03—Prefabricated parts, e.g. composite sheet piles
    • E02D5/04—Prefabricated parts, e.g. composite sheet piles made of steel
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22—Piles
    • E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
    • E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
    • E02D5/44—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds with enlarged footing or enlargements at the bottom of the pile
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/14—Drilling by use of heat, e.g. flame drilling
    • E21B7/15—Drilling by use of heat, e.g. flame drilling of electrically generated heat
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/28—Enlarging drilled holes, e.g. by counterboring

Definitions

  • the invention relates to a method and a tool for the manufacture of a pile and can be used in the manufacture of pile foundations in the construction and reconstruction of buildings and engineering structures.
  • a method for pile production is known (DE, C, 2651023), which is used to reinforce the existing foundations, and to bring down boreholes with the help of rotary impact drills while protecting casing pipes, to attach fittings and to insert a pipe for pumping a sand cement mortar into the drill block includes. After a mortar has been pumped in, an injection pipe is inserted into the borehole before it is set and a cement mortar is pumped in through this pipe under increased pressure, so that an extension is formed on the base of the resulting pile.
  • a disadvantage of this method is a low load-bearing capacity of the pile over its side surface, because a borehole is formed by excavating the floor and a loosened layer of soil is formed on its walls, which does not take part in the joint work with the pile. Therefore, you are forced to run a long-length pile so that its lower end is supported against a solid foundation (a rock, a moraine).
  • Another disadvantage of the method is also a low work output, because the operations for drilling a borehole, attaching casing pipes, pulling out a drilling tool, inserting a pipe into the borehole for pumping a sand cement mortar, filling the borehole with this mortar, pulling out the Formwork pipes and the pipe for pumping in the sand cement mortar, for inserting an injection pipe into the borehole and for pumping in a cement mortar one after the other, whereby a technological break must be taken between the latter two of the specified operations, which is related to the setting of a pile building material, which serves as a packer when pumping the cement mortar under high pressure.
  • a tool for producing a pile with a pipe for supplying a setting building material is known (US, A, 4060994), which is connected to a mortar pump.
  • the pipe is immersed in a borehole and, under pressure, it is fed with a setting building material which forms a pile body, the pipe being pulled out during the borehole filling with building material.
  • a disadvantage of this tool is that a pile made with the aid has a low load-bearing capacity because the tool only ensures that the building material is fed into the borehole without compaction of the surrounding soil.
  • the reduction in the load-bearing capacity of a pile is also connected with the fact that when the setting building material is fed into the borehole, it is inevitably mixed with water or soil.
  • continuity of the pile building material over the length of the pile is possible due to the breakthrough of groundwater or clay flushing into the interior of the pipe.
  • a disadvantage of the tool is also that it takes a long time to use it to make a pile because, in addition to drilling the hole and filling it with setting mortar, there are operations to protect the hole from collapse of its walls, i.e. install casing pipes in it or fill it with clay flushing.
  • the invention has for its object to develop a method and a tool for the manufacture of a pile, by means of which a floor area with increased density is formed around the pile, which cooperates with the pile, and the time of pile manufacture by reducing the Number of operations can be shortened.
  • This object is achieved according to the invention in a method for producing a pile by feeding a setting building material into the pile formation area in that electrical high-voltage discharges are generated in this building material when the building material is fed into the pile formation area, the area of the building material supply and the generation of discharge over the depth of the pile formation area is moved during the formation of a pile body and the total discharge energy is selected at each depth of the pile formation area in such a way that an increase in the diameter of a corresponding section of this area up to the desired diameter of the pile is ensured at this depth.
  • the increase in the load-bearing capacity of the pile produced by the method according to the invention is associated with the fact that when the high-voltage discharges are generated in the setting building material supplied to the pile formation area, there is a periodic, sudden increase in pressure, which expands this area, compresses the soil around this area, pushes the seepage and Pore water and infiltration of the setting building material into the freed-up soil pores. As a result, an area of anchored soil and an area of compacted soil are formed around a pile around the first area.
  • the cross-sectional area of the pile can be changed along its length by changing the total energy of the discharges over the depth of the pile formation area, as a result of which the load-bearing capacity of the pile can be adjusted depending on the type of soil during its manufacture.
  • the setting building material can be fed to a pilot borehole, which represents a pile formation area.
  • the imaging building material can also be fed directly to the soil, which in this case represents a pile formation area. An additional reduction in the time for pile production is achieved in that no borehole drilling is required.
  • the pile is manufactured with a radius that changes along its length, when the area of the building material supply and the discharge generation is shifted, it is expedient to change the number of discharges in such a way that in a given depth of the pile formation area this number is directly related to the desired radius of the pile at this depth is proportional.
  • the pile is manufactured with a radius that can vary in length, you can change the sequence of the discharges by shifting the area of the building material supply and the discharge generation so that their value in a given depth of the pile formation area is directly proportional to the target radius of the pile at this depth is.
  • the tool for producing a pile with a tube for supplying a setting building material additionally contains an electrical discharge device with coaxially arranged and mutually displaced electrodes, the first of which is designed in a ring shape and on an insulating rod running inside it is attached and the second is attached to the end of this rod and is connected to a current-carrying rod which is arranged inside the insulating rod and is connected to the central core of a coaxial cable, the shielding braid of which is connected to the first electrode, the diameter of the second electrode being larger than the diameter of the insulating rod, the first electrode is rigidly connected to the pipe end at which the outlet opening of the pipe is located, such that the axis of the first electrode is parallel to the pipe axis and the distance of the second electrode from the outlet opening pipe is not less than the electrode gap.
  • an electrical discharge device with coaxially arranged and mutually displaced electrodes
  • the tool according to the invention can be used when carrying out the method according to the invention, since it can generate high-voltage discharges therein simultaneously with the supply of a setting building material.
  • the tool is suitable for producing a pile both in a borehole and directly in the ground.
  • a pilot borehole 1 (FIG. 1) is drilled with a diameter that is smaller than the diameter of a manufacturing pile (in the case of a cylindrical pile) or as the minimum diameter of a pile to be manufactured ( in the case of a pile with a diameter that varies in length).
  • a tool 2 in the lower part of the borehole 1, which contains a pipe 3 for supplying a setting material and an electrical discharge device 4.
  • the pipe 3 is connected to a mortar pump (not shown) and the discharge device 4 to a current pulse generator 5.
  • the area 7 below the lower end of the tool 2 thus represents an area of the building material supply and the discharge generation. Each discharge causes a sudden increase in pressure in the borehole 1, which is partially or completely filled with building material 6.
  • the building material 6 is compacted in the area 7, the borehole 1 is expanded in its lower part, the seepage and pore water is pressed away from the adjacent soil and the building material 6 penetrates into the water-free soil pores to form an area 8 an anchored floor, which has an increased strength, and an area 9 of a compacted floor around the area 8, which has improved construction properties (the load-bearing capacity of the floor is increased by reducing the pore number and increasing the modulus of the soil deformation).
  • a free volume that arises when the building material 6 is compacted is constantly filled with new building material portions, so that each subsequent discharge takes place in a new volume of the setting building material.
  • a total discharge energy in this case a number of discharges, is selected in such a way that an expansion of the lower section of the borehole 1 up to the desired diameter of the pile in the lower pile part is ensured. In this way, the pile sole is formed.
  • the inventors have found in experiments that the energy of each discharge has to be at least 5 kJ, and the pressure of a hydraulic current in borehole 1 can be increased to 50-200 MPa.
  • the time of the pile formation exceeds the setting time of a setting building material, which causes a reduction in the strength of the pile building material.
  • the discharge energy is increased, the mass and dimensions of the system with which the method is carried out are increased.
  • the number n of discharges on each step can be selected such that the radius of a pile section to be produced falls below the target radius r by an amount b r on each step.
  • the K and ⁇ numbers are determined empirically.
  • the K number depends on the soil condition and changes in the range from 0.2 to 0.7.
  • the ⁇ number depends on the type of soil and increases with increasing soil density.
  • the ⁇ number for sand is 0.00163 and for clay soil 0.0021.
  • the total discharge energy during the movement of the tool 2 is changed in proportion to the required change in the pile radius, as follows from expression (10).
  • the tool is moved discretely with a step ⁇ h, the repetition frequency of the discharges is constant in this case and it is selected depending on the desired duration of a pile production taking into account the properties of the setting building material used, but not below 0.05 Hz. It is it is also possible to regulate a total discharge energy over the length of a pile to be manufactured by changing the repetition frequency of the discharges in accordance with changing the pile radius. It is obvious that the larger the required pile radius at a depth, the greater the repetition frequency of the discharges should be at this depth and vice versa. In this case, the tool 2 is moved continuously at a constant speed.
  • the energy of each discharge can be reduced when the repetition frequency of discharges is increased, but their total energy is ensured, which is sufficient to destroy the soil structure and to compact the soil.
  • every next discharge takes effect under conditions of unfinished soil compaction, which are caused by filtration properties of the soil, which determine the rate at which water is released.
  • the effectiveness of each discharge decreases and the energy expenditure for pile production increases. For example, with an initial value of the number of pores in a soil of 0.690, the compression effect of a discharge is reduced 9-fold when the repetition frequency of discharges increases from 0.09 Hz to 6 Hz.
  • the change in the repetition frequency of discharges enables the pile manufacturing speed to be regulated in a very wide range. It is not recommended to reduce the repetition frequency of discharges below 0.05 Hz because the time it takes for a pile body to form is comparable to the setting time of a setting building material. In this case, the effects of the discharges have negative consequences for the formation of a building material structure when setting, which reduces the load-bearing capacity of a pile.
  • the upper limit of the repetition frequency of discharges is given by the possibilities of a current pulse generator.
  • a depth h which is equal to the pile length
  • the tool 2 is pulled out and, if necessary, a fitting is inserted into the pile.
  • a throughput of the building material is set so that the building material 6 comes to coincide with the upper part of the pile.
  • an additional increase in the load-bearing capacity of a pile is achieved in this case in that no ground lifting takes place when a borehole is drilled and the pile is shaped by expanding the floor "from zero" to the target radius of the pile.
  • an undoubted advantage of pile manufacturing in the ground is a gain in terms of material and time, that no borehole should be drilled.
  • the number of pulses cannot be changed when the tool 2 moves, but the pulse repetition frequency can be changed in accordance with the specified law of changing a pile radius over the pile length.
  • the considerations set out above regarding the choice of the discharge energy and the repetition frequency of discharges also apply if a pile is produced directly in the ground.
  • the repetition frequency of discharges is selected so that the required plunge speed V of the tool is guaranteed:
  • the speed V is given in the ratio (13) in m / h.
  • the pile is made from its sole to the head, while the supply of building material and the generation of discharges during the tool transport to the place where the pile sole is formed is only for the purpose of reducing the ground resistance to the downward movement of the tool.
  • the tool for pile production contains a tube 3 (FIG. 5) for the supply of setting building material and an electrical discharge device with electrodes 10 and 11 which are arranged coaxially and displaced relative to one another along their axis.
  • the tube 3 consists of several sections, which are added when the tool is immersed in a borehole or in the ground; 5 shows the end of the lower section of the tube 3.
  • the electrode 10, which is the upper one in the operating position of the tool, is as a ring which is screwed onto a metal sleeve 12 and the lower electrode 11 as a cone with one large cone angle executed, the tip of which points downwards.
  • This version of the lower electrode 11 makes it easier to immerse tools in the ground, but it is not an obligatory one; the lower electrode can be designed as a flat disk or as a ring.
  • a current-carrying rod 13 is embodied, which runs along the axis of the discharge device inside the sleeve 12 and is connected to the central wire of a coaxial cable 14, which is connected to the one connection of a current pulse generator (not shown) .
  • the cable 14 should have a length which allows a tool to be immersed in a desired depth which corresponds to the length of a pile to be produced.
  • a space inside the sleeve 12, the current-carrying rod 13 to the lower electrode 11 and a section of the cable 14 connected to the rod 13 are filled with an insulating material, for example polyethylene, whereby an insulating rod 15 is formed.
  • the diameter of this rod 15 is smaller than the diameter of the electrode 11, for example by 8 to 10 mm, so that a space between the lower end face of the electrode 10 and an annular peripheral portion of the upper surface of the electrode 11, which protrudes over the rod 15, one Electrode spacing 16 forms.
  • the upper electrode 10 is welded to the end of the tube 3, a distance between an outlet opening 17 of the tube 3 and the lower electrode 11 is not less than the electrode spacing 16.
  • Another connection of the tube 3 to the electrode 10 is conceivable, e.g. the tube 3 can be screwed into this electrode.
  • the tube 3 can be separated from the electrode 10 beforehand by moving the electrode 10 in the sleeve 12, which simplifies the preparation of the tool for operation.
  • the tube 3 is electrically connected to the braided shield of the coaxial cable 14, which is connected to another connection of the current pulse generator, which is connected to its housing. So that stresses between the electrodes 10 and 11 in the event of discharges do not loosen the fastening of the current-carrying rod 13 in the insulating rod 15, the current-carrying rod 13 has annular projections 19.
  • a check valve 19 is arranged next to its outlet opening 17, which prevents soil penetration into the tube 3. This function can exercise a fender instead of the valve 19, which is attached to the tube 3 below its outlet bore.
  • the electrode 10 and the electrode 11 with the current-carrying rod 13 are made of a tough steel to harden the surface layer in order to reduce the metal removal from surfaces of the electrodes during the discharges.
  • the tool is brought into the vertical position, for example in a drilling device (not shown), in that the pipe 3 is clamped in the rotating device of this device.
  • a required electrode spacing 16 is set, which ensures the conversion of the electrical discharge energy into mechanical work with the greatest efficiency. If the pile is produced in a borehole, the tool is lowered onto the bottom of the borehole, the pipe 3 being added by sections when it is lowered.
  • the cable 14 is connected to the output of a current pulse generator and the pipe 3 to a mortar pump (not shown).
  • a binding building material is supplied under pressure to the bottom of the borehole and at the same time the generator is switched on, which applies current pulses to the electrodes 10 and 11.
  • High-voltage discharges occur in the electrode spacing 16, which expand the lower borehole section, which is filled with the setting building material, and anchor and compact the soil around this section.
  • the tool is gradually moved up. A tool movement is monitored, for example, on the basis of markings which are applied to the pipe side surface or on the feed plate of the rotary device of the drilling device.
  • FIG. 6 shows experimental data which show the change in soil strength around a pile 20 produced according to the invention.
  • a distance 1 from the pile axis in meters is plotted on the diagram and a depth h in meters is plotted vertically.
  • the area 8 of an anchored floor with a compressive strength R 0.4 to 1 MPa and the area of a compacted floor, consisting of three partial areas 21, 22 and 23 with values have arisen around the pile 20 of the soil deformation module E of 480, 330 or 310 MPa.
  • Discharge energy 33.34 kJ Discharge repetition rate: 0.18 Hz Stress on the tool for its immersion: 1 kN speed of the tool immersion: 40 m / h Tool immersion time: 0.025 h
  • Discharge energy 50 kJ
  • Discharge repetition rate 1 Hz
  • Number of steps 6
  • the table below contains other data.
  • Step no. Pile diameter at a given depth, m Step size, m Number of discharges per step Manufacturing time of a pile section on one step, h 0 0.3 0.13 3rd 8.3x10 ⁇ 4 1 0.33 0.14 4th 1.1x10 ⁇ 3 2nd 0.36 0.16 5 1.4x10 ⁇ 3 3rd 0.4 0.17 7 1.94x10 ⁇ 3 4th 0.44 0.19 11 3.1x10 ⁇ 3 5 0.49 0.21 18th 5.0x10 ⁇ 3 6 0.54 31 8.6x10 ⁇ 3
  • Setting building material sand cement mortar Intensity factor K of the storage of permanent soil deformations: 0.7 Coefficient ⁇ that depends on soil properties: 0.00302 Maximum cross-sectional dimension of the tool: 0.09 m Sand cement mortar throughput: 2.02 m3 / h Discharge energy: 50 kJ Discharge repetition rate: 1 Hz Number of steps: 12 Step size: 0.087 m Number of discharges per one step: 16 Manufacturing time of a pile section on one step: 0.0044 h Manufacturing time of a pile section with a length of 1 m: 0.062 h.
  • the production variants of the invention described deal with the manufacture of a cylindrical and a conical pile
  • the invention also applies to the manufacture of piles of other shapes, e.g. Stepped profile piles (i.e. piles consisting of several cylindrical sections with different diameters), which are expedient to manufacture in a floor, the one or more layers of which have a greatly reduced strength, and which can be used by cylindrical-conical piles.
  • a change in a pile radius over the pile length can be achieved not only by changing the number of discharges or the sequence frequency of the discharges during the tool movement, but also by regulating the energy of individual discharges.
  • the change in the energy of discharges can also be combined with a change in their number or repetition frequency.
  • the invention also ensures a lowering or, if the pile is made directly in the ground, a complete elimination of the effort for drilling a borehole and makes it possible to dispense with the use of casing pipes and a clay rinse, i.e. reduce the number of operations, thereby reducing the time to manufacture a pile.
  • the invention can be used in the manufacture of pile foundations during the construction and reconstruction of buildings and engineering structures.

Abstract

Un procédé de production d'un pilot consiste à acheminer un matériau autodurcissant (6) dans un trou (1) où dans le sol, tout en produisant des décharges de haute tension à l'intérieur du matériau (6), ainsi qu'à déplacer ladite zone d'acheminement du matériau et à produire les décharges de haute tension sur la hauteur du pilot à former. Le total de l'énergie de décharge à une profondeur donnée est choisi de manière à permettre l'élargissement de la section correspondante du trou (1) ou du sol jusqu'au diamètre voulu à ladite profondeur. On crée, sous l'influence des décharges, une zone (8) de sol cimenté présentant une ridigité accrue autour du pilot formé, ainsi qu'une zone (9) de sol compacté présentant des qualités de construction supérieures. Un outil de production d'un pilot comprend un conduit (3) destiné à acheminer le matériau, ainsi qu'un éclateur électrique doté d'électrodes (10, 11) placées coaxialement et espacées mutuellement, montées sur une barre isolante (15) passant à l'intérieur de la première électrode (10). La première électrode (10) est connectée à l'extrémité du conduit (3) doté d'un orifice de sortie (17) de sorte que l'axe de l'électrode est parallèle à l'axe du conduit (3), et de sorte que la distance entre la seconde électrode (11) et l'orifice de sortie (17) dudit conduit (3) n'est pas inférieure à l'espace interélectrode (16).
EP19900910974 1989-07-06 1990-03-06 Procede et outil de production d'un pilot Expired - Lifetime EP0481079B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90910974T ATE94929T1 (de) 1989-07-06 1990-03-06 Verfahren und werkzeug zur herstellung eines pfahls.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
SU4707757 1989-07-06
SU894707757A RU1688790C (ru) 1989-07-06 1989-07-06 Способ изготовлени набивной сваи
SU4716482 1989-07-27
SU894716482A SU1699360A3 (ru) 1989-07-27 1989-07-27 Cпocoб изгotobлehия haбиbhoй cbaи

Publications (3)

Publication Number Publication Date
EP0481079A1 true EP0481079A1 (fr) 1992-04-22
EP0481079A4 EP0481079A4 (en) 1992-07-01
EP0481079B1 EP0481079B1 (fr) 1993-09-22

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ID=26666209

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900910974 Expired - Lifetime EP0481079B1 (fr) 1989-07-06 1990-03-06 Procede et outil de production d'un pilot

Country Status (11)

Country Link
EP (1) EP0481079B1 (fr)
JP (1) JPH04506553A (fr)
AU (1) AU641174B2 (fr)
BG (1) BG60523B1 (fr)
BR (1) BR9007509A (fr)
CA (1) CA2063573A1 (fr)
DE (1) DE59002864D1 (fr)
ES (1) ES2047939T3 (fr)
FI (1) FI94543C (fr)
HU (1) HU209336B (fr)
WO (1) WO1991000941A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0624216A4 (en) * 1992-01-29 1995-10-25 Louis J Circeo Jr In-situ soil stabilization method and apparatus.

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Publication number Priority date Publication date Assignee Title
RU2470115C1 (ru) * 2011-05-20 2012-12-20 Петр Олегович Александров Способ электрогидравлической деформации ствола сваи
RU2473738C1 (ru) * 2011-08-03 2013-01-27 Петр Олегович Александров Способ сооружения несущего подземного основания
EA024019B1 (ru) * 2013-04-09 2016-08-31 Открытое Акционерное Общество "Буровая Компания Дельта" Способ изготовления буронабивной сваи
CN105064352A (zh) * 2015-07-21 2015-11-18 黄水森 建筑扩大头锚杆桩施工工艺及其锚杆桩
RU2657879C1 (ru) * 2017-09-22 2018-06-18 Гаврилов Геннадий Николаевич Способ изготовления сваи при укреплении земляного сооружения
RU2662469C1 (ru) * 2017-11-07 2018-07-26 Алексей Викторович Воробьев Способ изготовления сваи

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FR2528088A1 (fr) * 1982-06-04 1983-12-09 Solcompact Procede et dispositifs perfectionnes pour le compactage dynamique de sols
SU1300094A1 (ru) * 1985-10-22 1987-03-30 Проектно-Конструкторско-Технологическое Бюро С Опытным Производством Министерства Промышленного Строительства Бсср Устройство дл изготовлени набивных свай с уширением
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* Cited by examiner, † Cited by third party
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EP0624216A4 (en) * 1992-01-29 1995-10-25 Louis J Circeo Jr In-situ soil stabilization method and apparatus.

Also Published As

Publication number Publication date
FI94543B (fi) 1995-06-15
BG60523B1 (en) 1995-07-28
WO1991000941A1 (fr) 1991-01-24
CA2063573A1 (fr) 1991-01-07
HU209336B (en) 1994-04-28
DE59002864D1 (de) 1993-10-28
AU6057190A (en) 1991-02-06
JPH04506553A (ja) 1992-11-12
EP0481079A4 (en) 1992-07-01
ES2047939T3 (es) 1994-03-01
AU641174B2 (en) 1993-09-16
HU9200023D0 (en) 1992-08-28
HUT60795A (en) 1992-10-28
FI920032A0 (fi) 1992-01-03
EP0481079B1 (fr) 1993-09-22
BR9007509A (pt) 1992-06-23
FI94543C (fi) 1995-09-25

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