SU1331956A1 - Method of sinking screw anchor - Google Patents

Abstract

The invention relates to the construction, in particular, to the technology of fixing various building structures in the ground that require anchoring. The purpose of the invention is to facilitate immersion and increase the strength of embedment of a screw anchor when used in solid and dense soils. When the screw anchor 1 is immersed in dense and frozen soils, it is a specimen from the well depth that corresponds to the critical depth of the screw anchor. Then a screw anchor 1 is drilled from the bottom of the well to form a compacted soil plug between the bottom of the well and the screw anchor. After that, the well is filled with simultaneous compaction of the aggregate. To simplify the immersion of the screw anchor, the screw 3 can be used during the drilling of the well and its subsequent filling. The latter is concentrically mounted with the possibility of temporary fixation on the drive shaft 4, which is temporarily engaged with the screw anchor 1. 4 Il. with S (L with with sd 05

Description

one

The invention relates to the construction, in particular, to the technology of fixing in the soil various construction structures and building structures that are subject to pulling and tipping loads.

The purpose of the invention is to facilitate immersion and increase the strength of the termination of a screw anchor when used in frozen and dense soils.

Fig, 1 shows a screw anchor installed in a borehole, a general view; Figures 2-4 show the various stages of the immersion process.

When implementing the method to a depth equal to the critical depth of the screw anchor hc., Above

. Which causes the soil to be pushed onto the Surface under the action of a maximum load with the formation of a vypor cone, drills a well with the removal of drilled soil. According to experimental data, the critical depth for clay soils is usually 4–5, and for sandy ones 5–6 diameters of the screw blade of the anchor. After that, a screw anchor 1 connected to m - that 2 is drilled from the bottom of the well by drilling the soil without its removal to the surface. At the same time, a compacted soil plug is formed above the screw blade of the anchor, which, as the anchor is immersed, exerts pressure on it and requires an increase in the torque moment. When the time value is reached, corresponding to the specified degree of compaction of the upper 13319562

the possibility of axial movement and. temporary fixation on the drive shaft 4; In this case the drive shaft 4 enters VO temporary engagement with the screw anchor 1. When the screw 3 is rotated clockwise, the screw anchor 1, equipped with cutting elements, drills the soil, which is on the screw 3

10 enters the surface. After the critical depth has been reached, the screw 3 is disconnected from the drive shaft 4 and drilling continues without bringing the drilled soil to the surface,

15 When the specified torque value is reached, the drive shaft 4 is disconnected from the screw anchor 1 and, together with the screw 3, rotates counterclockwise. At the same time, the ground enters the well 20 with simultaneous compaction to a given density, which is achieved by the amount of axial force applied to the screw 3, which as the well is filled with soil is extracted to the surface. Thus, any degree of consolidation of the aggregate can be achieved, which significantly increases the strength of the seal of the screw anchor.

Claims (1)

Invention Formula 35 A method of immersing a screw anchor, including drilling it in the ground, characterized in that, in order to facilitate the immersion and increase the strength of embedding the anchor when used in frozen and dense drilled soil, immersion of Q soils stops before screwing the screw anchor. Then the well is filled with the soil extracted from it or. any other filler with its simultaneous compaction. To simplify the technology and increase productivity when drilling a well to a critical depth and its subsequent filling, auger 3 can be used concentrically mounted with The anchor anchor forms a well with a depth corresponding to the critical depth of the screw anchor, and the drilling is carried out from g well, with the formation of a compacted soil plug between the bottom of the well and the screw anchor, and after drilling the screw anchor the well is filled with compacted soil with gQ penetration. This is achieved by the amount of axial force applied to the screw 3, which, as the well is filled with soil, is removed to the surface. Thus, any degree of consolidation of the aggregate can be achieved, which significantly increases the strength of the termination of the screw anchor. Invention Formula 35 A method of immersing a screw anchor, including drilling it in the ground, characterized in that, in order to facilitate immersion and increase the strength of embedding an anchor when used in frozen and dense Q soils, before drilling the screw anchor, form a well with a depth corresponding to the critical depth of the screw anchor and the drilling is carried out g well, with the formation of a compacted soil plug between the bottom of the well and the screw anchor, and after drilling the screw anchor the well is filled with compacted soil with gQ penetration. 1 / N X / V Fi, g.Z. Phage.