RU1790643C - Pile - Google Patents

Abstract

SUMMARY OF THE INVENTION: A pit constructed in a pre-drilled well comprises a central bore, the diameter of which is 2 smaller than the diameter of the well, with movable outer ring elements located in height made of separate blocks with conical upper and lower planes interconnected by flexible connections in the upper plane and unfolding under the influence of its own weight and forcibly with the help of an inventory pipe. 4 ill.

Description

The invention relates to construction and can be used in the construction of columnar foundations and bridge supports mainly in harsh climatic conditions.

The closest to the described by the technical essence and the achieved result is a pile, including a trunk with movable outer russes arranged in height by outer ring elements made up of blocks connected by a flexible link in each rus and having upper and lower bevelled obliquely at an acute angle to the longitudinal axis facets.

A drawback of this design is that it is possible to erect only special drilling rigs equipped with a device for immersing and removing casing pipes. The unfolding of the ring elements does not allow the column to bear the vertical load bearing capacity, since the direction of the angle of rotation of the filling elements does not prevent the vertical movement of the structure and does not include them in joint work with the barrel for the vertical load.

The aim of the invention is to increase the bearing capacity for horizontal and vertical loads.

Figure 1 shows a sectional view of a pillar installed in the well and reinforced concrete ring elements surrounding it, rotated at different angles, moreover, to the left of the axis of symmetry is a variant of a pile constructed in a well with an casing inventory pipe, and to the right in a well without casing; figure 2 is a fragment of a pile with annular grooves; in Fig.3 is a section of a reinforced concrete ring element; figure 4 is a plan of the annular element.

The pile contains a continuous barrel with roughnesses in the form of annular grooves 2. The barrel is installed in a well, the walls of which are fixed by an inventory casing 3. Reinforced concrete ring elements are mounted on a centrally located barrel 1, divided into blocks 4. Blocks 4 are interconnected into a single ring by a flexible by connection 5. The upper and lower planes of blocks 4 are conical with a generatrix at an angle of about 45 ° and bevels 6 made in radius. Blocks are installed in Rus with the orientation in each Rus of the beveled faces along the lines descending from the trunk, and each flexible connection 5

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passes through the upper edges of the blocks of each rus facing the trunk.

The method of constructing a pile is as follows.

A borehole is developed with wall fastening by casing 3, without fastening (under conditions of connected stable soils) or with fastening with mud. The ring of blocks 4 is mounted on the barrel and loosely dropped. The casing pipe 3 is lifted to the height of the block 4. The second ring of blocks 4 is dropped. The inventory pipe 7 with the reinforced knife part 8 is mounted on the barrel 1. The pipe 7 is planted using a vibrator 9 (for example VP-1 ) or diesel hammer weighing 800-1200 kg. Under the influence of the weight of the blocks 4 and under the forced action of the pipe 7 due to the conical planes and the bevel 6, the blocks of the second ring 4 are deployed into the cavity freed from the casing 3, compacting the soil on the walls of the well. At the same time, the upper edge of the blocks 4 compresses the barrel 1 and stops in the grooves 2. The angle of rotation of the blocks 4 is determined by the amount of the pipe 7. Estimated local erosion). In stable soils, after each ring of blocks 4 has been immersed, a layer of sand 10 to 20 cm high is filled in, with which the gaps between the blocks 4 are filled. In weak soils, the gaps are filled with cut soil. The blocks 4 are then rotated to any angle.

Swa works as follows.

The horizontal load applied to the head of the barrel 1, depending on the rigidity of the barrel 1 and the elastic properties of the surrounding soil, is transmitted through blocks 4 to the surrounding soil, the compaction of which by blocks 4 ensures its natural state.

The vertical load applied to the head of the bore 1 is transmitted to the bottom of the well bore and due to the annular grooves on the surface of the bore, it is transmitted to each rus of blocks 4, which provide increased adhesion to the ground along the entire lateral surface of the bore with an increased lateral surface area.

The described solution makes it possible to increase the bearing capacity of piles for vertical loads and ensures guaranteed conservation of the natural state of any surrounding soil in any well formation methods.

Claims (1)

The claims A pile including a trunk with outer annular elements movably located in height, made up of blocks made up of flexible links in each Rus and having upper and lower faces angled at an acute angle to the longitudinal axis, characterized in that, in order to increase bearing capacity for horizontal and vertical loads, the blocks are installed in each channel with the orientation of the beveled faces along the lines descending from the trunk, and each flexible connection passes through the upper edges of the blocks of each channel facing the barrel, and the barrel in the zone of arrangement of the ring elements is made with annular grooves for the upper edges of the blocks facing the barrel. (r-kg 1