SU1491962A1 - Method of constructing cast-in-place shell pile - Google Patents

Abstract

The invention relates to construction and is used with the introduction of a stuffed pile shell in coherent non-water-saturated soils. The purpose of the invention is to improve the quality of the erected pile shell by reducing the water-cement ratio of the concrete mix. The method involves the formation of a ring-shaped well by immersing it in the ground to the design elevation of core 2 with a tamper ring at the end and a lost ring tip. Then, one of the opposite betonovods is used to supply the concrete mix under the tamping ring with simultaneous rotation of the core 2 around the longitudinal axis. After one complete rotation of the core 2, without stopping its rotation and feeding the concrete mixers through one of the pipelines, the dry concrete mix begins to flow through the other. At the same time, with the help of the tamping ring, both mixtures are compacted and partially tamped into the walls of the well to form a toroidal broadening. After that, the core is vibrated without stopping rotation and feeding both concrete mixes. 3 il.

Description

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four

with

WITH

marks of the core 2 with a tamping ring at the end and a lost ring tip. Then, one of the opposite betonovods is used to supply the concrete mix under the tamping ring with simultaneous rotation of the core 2 around the longitudinal axis. After one complete rotation of the core 2 without stopping its rotation and feeding through one of the concrete, the Invention relates to construction and can be used in the construction of ramming piles in connection with non-water-bearing soils.

The purpose of the invention is to increase the quality of the erected pile shell by reducing the water-cement ratio of the concrete mix.

1 shows a device for carrying out the method, a longitudinal section; 2 is a section A-A in FIG. one; in fig. 3- formation of the pile shell shell.

The method is carried out as follows.

A rubbed ring tip 1 is immersed in the ground with a vibrator (not shown) located on the upper end of the core 2, ending at the bottom with a tamping ring 3, which is; With a tr truncated scrap (killed 4 annular cavity 5. After reaching the project mark with a lost ring tip 1, the shell-trunk is formed, for which concrete mix 6 is fed into the space between the lost ring tip 1 and the tamping ring 3. Moreover, when it flows out of the betonovod 7 under the tamping ring 3, the core 2 starts to rotate around its longitudinal axis, and after turning it on the first 360 °, without stopping the supply of the finished concrete mix 6 under the tamping ring 3 through the concrete conduit 7 against The cement concrete line 8 begins to deliver dry concrete mix 9 under the tamping ring 3. Continuously and at the same time filling the space with ready-mixed concrete 6 and dry concrete mix 9. With the help of tamping ring 3, compaction is performed

nets of the concrete mixture in a different way begin to supply the dry concrete mix. At the same time, with the help of the tamping ring, both mixtures are compacted and partially tamped into the borehole walls until torus-like broadening is formed. After that, the core is vibrated without interrupting rotation and feeding both concrete mixes. 3 il.

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with both mixtures and with periodic vibrating precipitation of the core 2, tamping up part of them into the borehole walls until toroidal broadening of 10 walls of the pile shell in the

right place. As far as filling pro (

the spaces above the loose ring tip 1 by both concrete mixes 6 and 9 and as they are compacted by the tamping ring 3, the lower end of each concrete pipe moves upward along a helical line with a given pitch and linear speed, i.e. The core 2, rotating around its axis, vibrates, leaving in the ground under the tamping ring 3 a formed part of the shell-pile, the height of the longitudinal section of which alternately alternates the layers of finished 6 and dry 9 concrete mixes.

At the same time, after laying and compacting both concrete mixtures, water from the layers of ready-mixed concrete 6, having a given mobility, penetrates under the action of capillary forces into the pores of the layers of dry concrete mixture 9. At the same time, the total water-cement ratio of the whole mixture decreases compared to the water-cement ratio of the finished concrete mixture 6, which leads to an increase in the strength of the concrete of the pile shaft and due to which the consumption of cement can be reduced in the production of stuffed piles.

In order to obtain a given reduction in cement consumption while maintaining the required strength of the concrete of the pile shaft, a relationship can be established experimentally between the mobility of the finished concrete mix, the pitch of the helix, the linear speed of movement of the lower ends of the pipelines and the compression force of the tamping ring.

To reduce the frictional forces of the side surfaces of the tamping ring.

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Claims (1)

₁₅ The claims A method of erecting a stuffed pile pile, including the formation of an annular well by immersion in soil to the design mark _{20 of the} core with a tamper ring at the end. wells before the formation of toroidal broadening and subsequent vibration of the core without stopping the supply of concrete mixture, characterized in that, in order to increase eniya quality pile erected wrapper by reducing the water-cement ratio of the concrete mix, at vibroizvlechenii core is rotated about its longitudinal axis, 35 in this case, simultaneously with the supply of concrete mixture through one of the concrete ducts, the dry concrete mixture is supplied through the other.