SU870586A1 - Boring pile - Google Patents

Description

(54) SCREW PILED

I

The invention relates to the field of construction, in particular, to foundation engineering: and can be used as anchors of increased bearing capacity for fastening structures to the ground, for example, onopuf pipelines, bridges, power lines, as well as in industrial and civil construction.

Known screw pile, including the barrel with a pointed conical bottom and screw blades attached to the joint venture.

The disadvantages of the known screw pile are the low efficiency of the process of immersion of the structure in the grooves, which is caused by the need to use powerful systems that are under pressure. significant torsional moments o, the possibility of breakage (twisting) of the pile shaft, the failure of the pile to be driven into the ground.

The closest of the known technical solutions to this invention in its essence and the achieved result is a screw pile, including a barrel with a pointed lower part and screw blades, mounted with the possibility of autonomous rotation around the barrel and longitudinal movement relative to it t23.

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The disadvantages of the known screw pile are the significant material consumption of the pile due to the barrel made of concentrically located shells and the low efficiency of the pile immersion due to the need to perceive the shell with the lower blade, except for torque, drag, various sizes,

20 blades and manufacturing complexity.

Claims (1)

The purpose of the invention is to facilitate immersion, reduce material consumption and simplify manufacture. The goal is achieved by the fact that, in a well-known screw pile, including a barrel with a pointed lower part and screw blades installed with the possibility of autonomous rotation around the barrel and longitudinal movement relative to it, the blades are made of the same internal diameter, the barrel is provided with stiffening ribs placed on its pointed lower parts and having a face, inclined at an angle of 5-15 to the generatrix of the pointed lower part, as well as bushings, the internal diameter of which is equal to the internal diameter of the blades, placed concentric richly trunk metvdu. adjacent blades The essence of the invention is illustrated in the drawing, which shows a screw pile in section. The described screw pile includes a barrel 1 with a pointed conical lower part 2 and screw blades 3, made of the same internal diameter. The barrel 1 in the lower part 2 is provided with a stop 4 in the form of stiffening ribs mounted on the outer conical surface of the tip at an angle of 5-15 ° to the cone forming Between the blades 3 there are sleeves 5. The inner diameter of the blades 3 and the sleeves 5 is slightly larger than the outer diameter of the barrel 1. The width of the sleeves is taken from the condition that all blades 3 are brought into operation to increase the carrying capacity. The shaft 1 of the pile may be performed with or without cavity 6. The construction of the described pile is carried out as follows. In the soil 7 immersed barrel 1 pile driving on the tip, or installing in pre-drilled leader wells or wells of large diameter. When driving the barrel 1 into the ground 7, the stiffeners 4 provide rotation (due to the installation of the ribs under the yrhoM 5-15 ° to the generator of the cone) relative to the axis, which reduces the frontal resistance to immersion, by setting the soil compaction zones. After installing the barrel 1 to the design mark, the blades 3 and bushings 5 are sequentially immersed by means of inventory 4 pipes (rods), the base machine (not shown) or installation to the required depth. Moreover, the sleeve can be immersed by driving. Formed sinuses between the barrel 1 and the ground 7 can be filled with sludge for permafrost soils or cement mortar, sludge for conventional soils, which gives the structure additional rigidity. When affecting the pile alone, the filling of the sinuses with a solution or sludge is optional. Immersion of the described screw pile. Screwing is carried out using a single-dimension inventory pipe, which improves the efficiency of the pile immersion process and does not require a special tip design to evenly distribute the load on all blades. In addition, the screw pile is simplified by eliminating the concentric shells of the trunk, which significantly reduces the consumption of materials. Formula of the invention: Screw pile including a barrel with a pointed lower part and helical blades installed with the possibility of autonomous rotation around the barrel and longitudinal movement relative to it that, in order to facilitate immersion, reduce material consumption and simplify manufacture, the blades are made of the same internal diameter, the barrel is equipped with the same ribs the sticking places placed on its pointed lower part and having a face inclined at an angle of 5-15 to the forming sharpened lower part, as well as sleeves whose inner diameter is equal to the internal diameter of the blades placed concentrically to the trunk between adjacent blades. Sources of information taken into account during the examination 1. Bogorad L.Ya. Screw piles and anchors in electrical network construction. M., Energie, 1967 p.5. 2, USSR Author's Certificate, 447481, cl. E 02D 5/54, 1972 (prototype).