RU2681744C1 - Screw pile with removable conical tip - Google Patents

Abstract

FIELD: construction.SUBSTANCE: invention relates to the means used for the construction of foundations for low-rise construction, bridges, power lines. Screw pile contains a hollow barrel with a screw blade fixed on it, at the bottom of which there is a conical tip. Conical tip is held in two holes which are perpendicular to the axis of the pile, made in the barrel, with a retainer consisting of two sliders and a spring between them. Retainer is located in the tube attached to the conical tip, the slide blocks of which are connected to the rods, the ends of the rods passing through the groove in the tube are pivotally connected to the cranks resting on the axis passing through the line of intersection of the cranks. Ends of the cranks are connected to a cable extending outside through the upper hole of the barrel through which the conical tip can be removed.EFFECT: technical result consists in reducing the time required to strengthen the soil under the pile support part by increasing the throughput capacity of the holes in the pile shaft intended for feeding mixtures used to strengthen the soil.1 cl, 2 dwg

Description

The invention relates to the field of construction, and in particular to the means used for the construction of foundations for low-rise construction, bridges, power lines.

Known screw pile in the soil, containing a hollow trunk and soil from its outer side, and the trunk is equipped with screw blades and holes are made in the lower part of the pile shaft, and in the adjacent to the pile soil is loosened, characterized in that the holes are located under the lower blade evenly along spiral, the twist angle of which coincides with the twist angle of the lower blade, and the soil adjacent to the pile is uniformly mixed with the soil-sealing mixture along the path of the screw blades of the pile when it is screwed and connected with reinforced m soil layer located below the blade (see patent RU 2571873, class E02D 5/56, publ. 12/27/2015).

Known screw pile in the soil with a removable tip, containing a hollow trunk and soil from its outer side, and the barrel is equipped with a hollow removable tip having an upper cylindrical and lower conical part and equipped with at least one helical blade in the conical part, characterized in that holes are made in the body of the conical part of the tip, which are located at the end of the specified part, as well as along the helical line connecting the lateral surface of the conical part of the tip with the screw blade and placed over asth and / or underneath, and the soil adjacent to the pile is uniformly mixed with the soil-sealing mixture along the path of the screw blades of the pile shaft when it is screwed and connected with the soil strengthening located below the blade (see patent RU 2571869, class E02D 5/56, publ. 12/27/2015).

A disadvantage of the known piles is the large time required for their installation, since it takes much more time to properly soak the soil with a mixture under pressure than to screw them. Therefore, these operations are more efficiently performed separately. Another drawback is the complexity of the design due to the need to use a special device that provides a tight supply of mixtures through the pile shaft while rotating it.

Known screw pile containing a hollow shaft equipped with screw blades, and, in the lower part of the pile shaft holes are made, characterized in that the holes are located under the lower blade evenly in a spiral, the twist angle of which coincides with the twist angle of the lower blade (see RU patent 2570584, class E02D 5/56, published December 10, 2015).

Known screw syringe type containing a tubular barrel with a screw blade fixed on it, the lower end of the tubular barrel is made with one-sided sharpening and rigidly sealed, characterized in that under the screw blade holes are made in the barrel in a spiral, the twist angle of which coincides with the twist angle of the screw blades, while the pitch of the holes is selected depending on the density of the soil, characterized in that in a rigidly sealed one-sidedly pointed lower end of the tubular trunk ENO at least one hole (see. Patent RU 2569654, Cl. E02D 5/56, publ. 11.27.2015).

A common disadvantage of the known piles is the low throughput of the holes in the pile shaft and the tip, intended for the supply of reinforcing mixtures. When screwing the piles into the open holes, soil enters, which reduces their throughput and prevents the penetration of mixtures from the pile shaft into the soil.

The objective of the invention is to eliminate this drawback. The technical result consists in reducing the time for strengthening the soil near the pile, by increasing the throughput of the holes in the pile shaft, intended for supplying the mixtures used to strengthen the soil, feeding the mixtures under the support part of the pile through the lower hole of the shaft and two side holes, which when screwing the pile closed, and opens after installation when removing the conical tip located at the lower end of the pile.

The problem is solved, and the technical result is achieved by the fact that a screw pile containing a hollow shaft with a screw blade fixed to it in the lower part of which has a conical tip held in two holes perpendicular to the axis of the pile made in the barrel by a retainer consisting of two sliders and a spring between them. The latch is located in a tube mounted on a conical tip, the sliders of which are connected to the connecting rods, the ends of the connecting rods passing through the groove in the tube are pivotally connected to the cranks resting on the axis passing through the intersection line of the cranks. The ends of the cranks are connected to a cable extending outward through the upper hole of the barrel, through which the conical tip can be removed.

In FIG. 1 is a drawing of a screw pile with a removable conical tip. In FIG. 2 shows a pile after screwing it into the ground at the moment of removing the conical tip from the trunk.

The screw pile consists of a barrel 15, in the lower part of which there is a conical tip 1. On the conical tip 1, a screw 3 is fixed to a tube 3, in which a clamp is located, consisting of sliders 4, 5 and spring 6. The sliders are pivotally connected to connecting rods 7 and 8. The connecting rods through the groove in the pipe are pivotally connected to the cranks 9 and 10 mounted on the axis And, supported by the posts 12, 13, the posts are fixed on the conical tip 1. A cable 14 is attached to the ends of the cranks, the end of which goes out through the upper hole in the barrel 15.

A ring 16 is fixed at the lower end of the barrel 15. In the working position, the slide sliders enter the holes 17 and 18 located perpendicular to the axis of the pile in the lower part of the barrel 15 (see Fig. 2). The ring 16 is designed to protect against ingress of soil into the pile through the gap between the conical tip and the barrel wall. Screw blade 20 is rigidly attached to the pile shaft.

The device operates as follows. The pile is screwed into the ground to a predetermined depth. Then the cable 14 is manually stretched, the force through which is transmitted to the cranks 9 and 10. Turning on the axis 11, the cranks move the ends of the connecting rods 7, 8 and the sliders 4, 5 towards the central axis of the pile, compressing the spring 6. When the sliders exit the holes, the conical tip 1 moves up and is removed from the pile, while the lateral holes 17 and 18 and the hole 19 in the lower part of the trunk are opened, allowing unhindered passage of mixtures intended to strengthen the soil through the pile shaft. With repeated use of the conical tip, the metal consumption and the complexity of manufacturing a screw pile are reduced.

Claims (1)

A screw pile containing a hollow shaft with a screw blade fixed to it, at the bottom of which there is a conical tip, characterized in that the conical tip is held in two holes perpendicular to the axis of the pile, the holes made in the barrel, with a retainer consisting of two sliders and a spring between them, the latch is located in a tube mounted on a conical tip, the sliders of which are connected to the connecting rods, the ends of the connecting rods passing through the groove in the tube are pivotally connected to the cranks resting on the axis passing through es cranks intersection line, the ends of cranks connected to the cable emerging outwardly through the upper opening of the barrel, through which the conical tip can be recovered.

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