RU2808246C1 - Pile installation method - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: method of installing piles is characterized by the fact that before the installation of piles begins, wells are drilled under the installed piles; drilling is carried out to a depth greater than the length of the pile pipe. Concreting is carried out at the bottom of the well, during which a concrete base is formed. Then a pile pipe is driven into the wells, placing it at the lower level on top of the concrete base, reinforcement is installed into the driven and mounted pipe, and the interior of the pipe is concreted. A head with a damper piston is mounted in the upper part of the pipe, a damper head is placed above the head, on the lower side of which a damper cylinder is mounted in response to the damper piston, and a damper is placed inside the damper cylinder.

EFFECT: ensuring the integrity of the structure during seismic activity.

1 cl, 13 dwg

Description

The method of installing piles relates to construction. [E02D5/00, E02D15/02, E02D17/00, E02D27/12, E02D27/14].

A MULTI-PILE FOUNDATION AND A METHOD FOR ITS CONSTRUCTION ON FROZEN SOILS [RU2584019 (C1), 2016-05-20] is known from the prior art, in which a foundation for frozen soils is disclosed. A multi-pile foundation contains a foundation frame that unites the upper ends of screw piles, each of which has a metal pipe and a screw working body with blades attached to the lower end of the pipe. The pipe and screw working body are covered with a composite anti-corrosion coating. At the upper ends, the caps are additionally welded to a base plate at the height of the ground surface, which provides ventilation of the space under the foundation frame and prevents changes in the structure of the permafrost underneath. Pile pipes additionally contain a non-freezing coating on the outside, and their internal cavity is filled with a dry sand-cement mixture. The blades of the screw working body are made as support blades with a transverse size of two to three diameters of the pile shaft. The foundation frame is made of metal beams mounted in the form of a rectangular double-row frame, double-row transverse and/or double-row linear support, while between the beams at the points of attachment of the foundation frame on the pile heads, as well as at the locations of supporting structures, support-spacer connecting elements are installed equipped with beam braces, as well as seats for racks of supporting structures on the foundation frame beams with the possibility of their longitudinal movement along the surface of the foundation frame beams.

The technical result is an increase in the efficiency of constructing a pile foundation and an increase in its load-bearing capacity and stability of frozen soils under conditions of seasonal freezing and thawing of the upper layers of the soil. The disadvantage of this analogue is the lack of ability to dampen seismicity, which can lead to the destruction of the building where this structure is used as a foundation.

Also known from the prior art is a SYSTEM OF LOAD-BEARING STRUCTURES OF PILED WALLS WITH A MULTI-WELDED DRIVE TYPE CONNECTION [CN217923603 (U), 2022-11-29], which is a building system that supports a wall, is driven in the opposite connection with many piles, includes along a number of wall grooves peripheral continuous closed installation of a foundation pit a plurality of row steel reinforcement frames (or prefabricated tubular pile, pile beam, etc.) placed in a groove in the wall, each interval between row steel reinforcement frame (or precast pile, pile beam and etc.) is filled with ordinary concrete for pouring into the wall groove, ordinary concrete with a frame of steel reinforcement series (or prefabricated tubular pile, pile beam, etc.) combines a pressure structure that forms the foundation pit support system. The utility model discloses a method for cutting grooves in a wall and placing a frame of steel reinforcement (or a prefabricated tubular pile, piling beam, etc.) in a recess in the wall, both across the entire width of the finished wall of an underground solid wall, and in terms of the amount of contact surface, and stagnant water is effective, and the advantages such as straightness, ease of control, suspension, simultaneously absorbed the row's stake steel reinforcement frame (or prefabricated tubular pile, pile beam, etc.) and ensured maneuverability, ease of lifting and installation, synthesized with Advantages such as the small volume of steel have led to some complex structures being specially adapted to support deep foundations. The disadvantage of this analogue is the lack of ability to dampen seismicity, which can lead to the destruction of the building where this structure is used for the installation of walls.

The closest in technical essence to the proposed technical solution is CONSTRUCTION OF A LOAD-BEARING PLATFORM FOR A MULTIPLE FOUNDATION AND FORMWORK FOR FILLING A LOAD-BEARING PLATFORM [CN217998141 (U), 2022-12-09], in which the load-bearing platform of a multi-pile foundation of a building and a template for pouring a load-bearing platform are disclosed, wherein the multi-pile foundation support platform comprises a pipe pile, a base plate, a support platform and a main column; the base plate is connected to the top of the tubular pile; the support platform is located on the support plate, and a first filling hole is provided in the support platform corresponding to the position of the tubular pile; a reinforcement cage is placed in the tubular pile, which passes through the base plate and passes into the first filling hole; the support platform is further provided with a second casting hole, and steel rods at the lower end of the main column are located in the second casting hole. The construction efficiency of many pile foundation pads can be increased and construction time can be increased. The disadvantage of the prototype is the lack of ability to dampen seismicity, which can lead to the destruction of the building where this structure is used to install the foundation.

The technical problem of the analogues and the prototype is that these technical structures are complex and they do not provide for the possibility of damping seismicity, which can lead to the destruction of the building during the construction of which these structures were used during installation.

The objective of the invention is to eliminate the shortcomings of the prototype.

The technical result is to ensure the integrity of the pile structure during seismic activity.

The stated technical result is achieved due to the fact that the installation method is characterized by the fact that before the installation of piles begins, wells are drilled under the installed piles, drilling is carried out to a depth greater than the length of the pipe, concreting is carried out at the bottom of the well, during which a concrete base is formed, then a pipe is driven into the wells, placing it at the lower level on top of the concrete base, reinforcement is installed in the driven and mounted pipe, the internal space of the pipe is concreted, a head is mounted in the upper part of the pipe, damper heads are placed above the head, on the lower side of which, in response to the damper pistons, damper pistons are mounted cylinders, dampers are placed inside the damper cylinders.

Brief description of the drawings.

Fig.1. The main elements of a pile for the installation of polypipe piles are shown.

Fig.2. depicts types of reinforcement cages inside a pipe with a central vertical reinforcing rod;

Fig.3. depicts types of reinforcement cages inside a pipe with a central vertical reinforcing rod and horizontal rods;

Fig.4. depicts types of reinforcement cages inside a pipe with vertical reinforcing bars and horizontal (or inclined) bars;

Fig.5. depicts options for pipe placement when installing polypipe piles.

Fig.6. the shapes of the heads of polypipe piles are shown (top view).

Fig.7. shows the types of caps used in the installation of polypipe piles (side view) - a welded cap with embedded parts.

Fig.8. shows the types of heads used in the installation of polypipe piles (side view) - the head with embedded parts (not welded), is inserted into the concrete until it hardens.

Fig.9. shows the types of caps used in the installation of polypipe piles (side view) - a welded cap without embedded parts.

Fig. 10. shows an option for installing polypipe piles under a square-shaped building with a protrusion.

Fig. 11. shows an option for installing caps to dampen seismicity.

Fig. Figure 12 shows an option for installing piles under the three-pipe option.

Fig. Figure 13 shows a drilling tool used in the installation of piles.

Figure 1.7 indicates: 1 – pipe, 2 – reinforcement, 3 – concrete, 4 – lower level of the pipe,
5 – concrete base, 6 – head, 7 – damper piston, 8 – damper head,
9 – damper cylinder, 10 – damper.

Implementation of a technical solution.

The method of installing piles is implemented through group installation of piles, one next to the other, in a given geometric order (Fig. 3, Fig. 6). Each of the piles is mounted from a pipe 1 (Fig. 1), made of a material with high strength, for example, steel or concrete, inside which reinforcement 2 is mounted (Fig. 2), the remaining internal space in the pipe 1 is filled with concrete 3, and the lower level pipe 4 is installed on a concrete base 5, the upper hole of pipe 1 is closed with a cap 6 (Fig. 4, 5). At the same time, damper pistons 7 are mounted on the surface of the heads 6 at their corners, or, alternatively, in the geometric centers of the heads 6. Above the heads 6, damper heads 8 are placed on the underside of which, in response to the damper pistons 7, damper cylinders 9 are placed. Dampers 10 are mounted inside the damper cylinders 9, which are springs, or, alternatively, spring material.

The technical solution is used as follows.

Before the installation of piles begins, wells are drilled for the installed piles, in accordance with the required configuration. Drilling is carried out to a depth greater than the length of pipe 1. At the bottom of the well, concreting is carried out to obtain a concrete base 5, on which pipe 1 will be installed with its lower level 4. Then pipes 1 are driven into the wells and installed, which are installed with reinforcement 2, the internal space of the pipe 1 is filled with concrete 3. A head 6 is mounted in the upper part of the pipe 1. Damper heads 8 are placed above the heads 6, on the lower side of which, in response to the damper pistons 7, damper cylinders 9 are mounted. Dampers 10 are placed inside the damper cylinders 9. If seismicity occurs, extinguished due to the activation of dampers 10, placed between the heads 6 and the damping heads 8, in the damping cylinders 9. The elasticity of the dampers 10 is calculated based on the seismicity of the territory in which the building is being erected according to the results of seismic observations.

The technical result - ensuring the integrity of the structure during seismic activity, is achieved through the use of heads 6, above which damper heads 8 are placed, on the lower side of which, in response to the damper pistons 7, damper cylinders 9 are mounted, inside of which dampers 10 are placed. Also, the stated technical result is achieved due to the fact that drilling is carried out to a depth greater than the length of the pipe, which ensures reliable placement in the well in the future; Concreting is carried out at the bottom of the well - which ensures reliable fixation of the pipe at the lower level; reinforcement is installed into the plugged and installed pipe, the internal space of the pipe is concreted - thereby achieving the required structural rigidity to maintain integrity during seismicity.

Example implementation.

The author independently implemented the proposed method (see Fig. 8-9). It was experimentally established that a building created using three-pipe packages with a pipe length of 15 m and a diameter of 133 mm in the foundation survived an earthquake of magnitude 5.1 without consequences. No cracks or damage were found on the building elements. At the same time, an analysis of the integrity of structures known from the prior art (built in the same area) showed that on average they are damaged from 10 to 20%. In this way, the stated technical result is achieved - ensuring the integrity of the pile structure during seismic activity. At the same time, the speed of construction of a permanent building exceeded the accepted standards for this territory by 40%.

Claims (1)

A method of installing piles, characterized by the fact that before the installation of piles begins, wells are drilled under the installed piles, drilling is carried out to a depth greater than the length of the pile pipe, concreting is carried out at the bottom of the well, during which a concrete base is formed, then the pile pipe is driven into the wells , placing it at the lower level on top of the concrete base, reinforcement is installed into the clogged and mounted pipe, the internal space of the pipe is concreted, a head with a damper piston is mounted in the upper part of the pipe, a damper head is placed above the head, on the lower side of which a damper cylinder is mounted in response to the damper piston, inside The damper is placed on the damper cylinder.