RU2097489C1 - Process of placing concrete into cast-in-place piles and installation for its implementation - Google Patents

Abstract

FIELD: manufacture of drill poles of small and large diameters for civil and bridge construction employing functional method "wall in ground", erection of moorage walls and underwater reinforced concrete blocks of water-development works. SUBSTANCE: installation for placing concrete into cast-in-place piles has drilling transport facility 1, drilling working element 2, mechanism 3 to drive in and remove tubes 3, sectional casing 4, sectional concrete casting tube 5, accumulating hopper 6, concrete pump tube 7, hoisting mechanism 8, mast 9 of drilling transport facility, hydraulic conductor-pile cap 10, depth hydraulic vibration exciter 11, hollow vibration exciter 12, stamping steel flat fins 13, thinning steel flat fins 14, pump set 15, hydraulic hoses 16, dimensional clamps 17, hoses of motors of vibration exciter 18. Specific feature of process consists in formation of holes, feed of concrete mixture through concrete casting tube, formation of pile over entire area and height with movement of concrete casting tube and compaction of concrete mixture by vibrations. Hole is filled with concrete mixture preferably to value of cycle movement of concrete casting tube, then concrete casting tube together with vibration exciter and vibration compactor is lifted upwards by vibration under mode of "vibration stamping" compacting concrete mixture. When vibration compactor comes to upper level of concrete mixture movement of concrete casting tube is stopped and final compaction of laid part of concrete mixture is conducted. EFFECT: enhanced functional efficiency of process and installation. 3 cl, 1 dwg

Description

 The invention relates to the field of construction and can be used for concreting rammed piles, for the construction of piles of both smaller and larger diameters for bridge building and civil engineering, for the construction of foundations by the wall-in-ground method, as well as for the construction of mooring walls and underwater reinforced concrete massifs hydraulic structures.

A known installation for concreting stamped piles containing a vehicle with a lifting mechanism, a hopper for supplying concrete mixture, casing and concrete pipe, vibration exciter and drive [1]
Without begging the merits of the known technical solution, its disadvantage is increased material consumption and insufficient efficiency in work during the installation of equipment and the supply of concrete mix into the well.

The closest technical solution is the installation for concreting rammed piles containing a vehicle with a lifting mechanism, a hopper for supplying concrete mixture, a casing and composite lengthwise concrete pipe, conductor, vibration excitement and drive [2]
However, this technical solution is also not efficient enough in operation, since it does not provide an intensification of the process of supplying concrete mixture to the well.

There is a method of concreting rammed piles, including the formation of a well, supplying a concrete mixture to a well through a concrete pipe and forming piles over the entire area and height when moving the concrete pipe and compacting the concrete mixture due to vibrational vibrations [1, 3]
However, the known method does not provide guaranteed solidity of the laid concrete with the elimination of voids and caverns.

 The proposed installation for concreting stamped piles is devoid of the above disadvantages and is most industrially applicable in operation due to the fact that it provides increased load-bearing capacity of the structure, as well as its water resistance, frost resistance and guaranteed monolithicity of the laid concrete with the elimination of voids and cavities, as well as provides for supply and laying concrete mix to a depth of 50 m with a draft of a cone of 6-8 cm.

 The industrial applicability of the proposed installation for concreting rammed piles is ensured by the fact that it includes a vehicle with a lifting mechanism, a hopper for supplying concrete mixture, a casing and lengthwise concrete pipe, a conductor, a vibration exciter and a drive, while the vibration exciter is mounted on the lower end of the concrete pipe , the outlet part of which is equipped with a hollow porous vibration damper, and the conductor is installed on the upper end of the concrete pipe, located opposite to the last and casing tube and is provided with an elastic device for reciprocating betonolitnoy pipe in a vertical plane, wherein the casing is made as an integral over the length and over its outer portion zadavlivaniya mechanism is set and removed from the soil pipe.

 The proposed method for concreting rammed piles is also devoid of the above disadvantages and is most industrially applicable in operation due to the fact that it provides increased load-bearing capacity of the structure, as well as its water resistance, frost resistance and guaranteed monolithicity of the laid concrete with the elimination of voids and caverns, and ensures supply and laying concrete mix to a depth of 50 m with a draft of a cone of 6-10 cm.

 The industrial applicability of the proposed method of concreting rammed piles is provided by the fact that it includes the formation of a well, the supply of concrete mixture to the well through a concrete pipe, the formation of piles over the entire area and height when moving the concrete pipe and compaction of the concrete mixture due to vibrational vibrations, while the well is filled concrete mixture, preferably by the magnitude of the clock movement of the concrete pipe, then the concrete pipe together with the vibration exciter and vibration damper raise IU up with vibrational vibrations in the "vibro-stamping" mode, the concrete mixture is compacted when lifting, and when the vibro-sealer reaches the upper level of the concrete mixture, the concrete pipe is stopped moving and the final vibro-seal is made of the volume of the laid part of the concrete mixture, after which the well is filled again with concrete mixture and the cycle is repeated. In addition, the proposed method is also implemented in the case when the well is filled with concrete mixture to the entire depth of the pile.

 The drawing shows a installation for concreting rammed piles, General view.

 Installation for concreting rammed piles contains a drilling vehicle 1, a drilling working body 2, a mechanism for crushing and removing pipes 3, a sectional casing pipe 4, a sectional concrete pipe 5, a storage hopper 6, a pipe of concrete pumps 7, a load-lifting mechanism 8, a mast of a drilling vehicle 9 , hydraulic conductor cap 10, deep hydraulic exciter 11, cirrus hollow damper 12, stamping steel flat feathers 13, thinning steel flat feathers 14, pump unit 15, The hydraulic pipes 16, 17 overall fender bracket, hoses exciter motor 18, the metal frame 19 being constructed pile.

 The installation for concreting rammed piles is as follows.

 After the drilling vehicle 1, using the drilling tool 2 and the sectional casing 4 in the ground, form a well 20, a reinforcing cage 19 and a concrete casting pipe 5 are placed in it. A conductor cap 10 is fixed on the casing 4 to which it is elastically fixed concrete pipe 5, the barrel of which is rigidly covered by vibration exciter 11. The lower part of concrete pipe 5 is equipped with a cirrus hollow vibration absorber 12. The pump unit 15 is located on the day surface, and from its console the operator controls the operation of the additional equipment with proper interaction with the drivers of the drilling vehicle and the lifting equipment servicing the facility. The next portion of concrete 21 is fed by a lifting mechanism 8, or by a concrete pump to the concrete pipe through the loading hopper 6. The vibration exciter is switched on in the "concrete supply" mode and the concrete pipe oscillates. Under the influence of vibration, the concrete mixture begins to flow intensively from the concrete pipe into the well 20 and fill the inner space of the casing, rising up to a predetermined tact height (2 8 m). After this, the supply of concrete is stopped, and the driver of the drilling vehicle also removes the casing to the stroke height, and the concrete mixture remains in this section of the well already in contact with the ground. The vibration exciter is slinged with a load-lifting mechanism, it is switched on in the “vibro-stamping” mode and gradually it is lifted together with the concrete casting pipe and the vibration seal up until the mouth of the vibration seal reaches the upper level of the laid concrete, remaining immersed in it to some depth. Thus, the technological projectile is removed from the well with the gradual processing of the laid concrete mixture on a given section of the constructed foundation with a vibratory compactor. Then, the concrete mixture is again filled and vibro-compacted to the next clock height, while in the process of vibro-compacted the near-pile soil compaction effect is provided both from below and from the side of the well to its entire height. As the well is filled and the process equipment is raised, uncoupling and removal of the released sections of casing and concrete pipes is performed.

 The sequence of operations of the method of concreting printed piles is as follows. A well is pre-drilled, then concrete mixture is fed into the well through a concrete pipe and piles are formed over the entire area and in height when moving the concrete pipe and the concrete mixture is compacted due to vibrational vibrations, while the well is filled with concrete mixture, preferably by the stroke time of the concrete pipe, then the concrete pipe together with the vibration exciter and vibration damper is lifted from bottom to top with vibrational vibrations in the "vibro-stamping" mode, produced when lifting the concrete mixture is compacted, and when the vibro-compactor reaches the upper level of the concrete mixture, the concrete pipe is stopped moving and the volume of the laid concrete part is vibro-compacted, then the well is filled again with concrete mixture and the cycle is repeated, while the vibro-compacting provides compaction of the near-pile soil , both from below and from the side of the well to its entire height. As the well is filled and the process equipment is raised, uncoupling and removal of the freed sections of casing and concrete pipes is performed.

The invention makes it possible at relatively small additional costs to obtain positive results, including increasing the grade of concrete and the bearing capacity of the structure, to ensure water resistance and frost resistance of reinforced concrete of a building, to guarantee the solidity of the laid concrete with the elimination of voids and caverns, to feed and lay to a depth of 50 m with a draft of cone of 6-10 cm, achieve cement savings in the amount of 150-200 kg per 1 m ^{3 of} concrete and ensure "revitalization" of the concrete mixture for 6-8 hours in case of Not forced interruptions in the process of laying concrete and thereby eliminating the marriage and the need for additional foundation work.

Claims (3)

 1. The method of concreting stuffed piles, including the formation of a well, supplying a concrete mixture to a well through a concrete pipe, forming piles over the entire area and height when moving the concrete pipe and compacting the concrete mixture due to vibrational vibrations, characterized in that the well is preferably filled with concrete mixture by the magnitude of the clock movement of the concrete pipe, then the concrete pipe together with the vibration exciter and vibration absorber is lifted from the bottom up with vibrational vibrations in the "vib oshtampovanie "produced when lifting concrete mix compaction and vibrating compactor at an output to an upper layer of concrete mix cease movement betonolitnoy tube and produce a final volume laid vibration compaction the matrix, after which the newly filled with concrete mix is carried out of the well and the cycle is repeated.  2. The method according to p. 1, characterized in that the well is filled with concrete mixture to the entire depth of the pile.  3. Installation for concreting rammed piles containing a vehicle with a lifting mechanism, a hopper for supplying concrete mixture, a casing and lengthwise concrete pipe, a conductor, a vibration exciter and a drive, characterized in that the vibration exciter is mounted on the lower end of the concrete pipe, the outlet of which is provided a hollow porous vibration damper, and the conductor is installed on the upper end of the concrete pipe, located opposite to the last and casing pipe and equipped with a device for elastic return - translational movement of the concrete pipe in a vertical plane, and the casing is also made integral in length, and a mechanism for crushing and removing pipes from the ground is installed above the upper part of the composite casing.