RU2028412C1 - Device for sinking encased piles - Google Patents

Abstract

FIELD: construction. SUBSTANCE: device for sinking encased piles includes tubular drill 1 with circular die 3 and packing ring 4 located on its outer side. Die is installed for interaction with encased pile and forms with encased pile as annular closed space communicated with space between lower end of encased pile and die and with ground enclosing pile, as well as with medium source by means of pressed pipeline 9 with check valve 10. Die in this case, is made with outer radius exceeding outer radius of encased pile. Drill has pusher secured to it and is located from its upper end at distance nor exceeding the value of sinking of drill for one sinking cycle. EFFECT: extended technological capability due to its use for assembled encased piles, and their easy sinking. 3 cl, 3 dwg

Description

 The invention relates to construction and can be used for the construction of pile foundations.

 The purpose of the invention is the expansion of technological capabilities by making it possible to use prefabricated pile shells and facilitate their immersion.

 Figure 1 shows a device for immersion piles-shells in the process of immersion, a longitudinal section; figure 2 - node I in figure 1; figure 3 is the same option.

 The device consists of a tubular drill 1 with a stop 2, an annular stamp 3, while the drill 1 on the outside is equipped with a sealing ring 4 fixed to it, forming a closed cavity 6 during immersion of the pile sheath 5, connected to the surrounding soil 7 by, for example , channels 8, made in the upper end of the stamp 3, and with the source of the working agent (not shown) by means of a pressure pipe 9 with a check valve 10.

 The device operates as follows.

 A drill 1 with a stamp 3 is installed on the ground 7 of the base and the drill 1 is partially immersed before comparing the position of the top of the stamp with the soil surface 7. After this, the pile-shell 5 and the conductor 11 are installed on the stamp 3, which serves to fix the position of the shell 5 when immersed and exceptions for the release of the working agent to the soil surface, and then, if necessary, they also fix the upper ends of the drill 1 and shell 5 mountingly with each other, immerse into the ground 7 of stamp 3 with drill 1 and transfer it to the last immersion air Corollary. In this case, immersion is accompanied by the formation of an annular gap 12 between the soil 7 and the outer surface of the pile 5, which is filled in the course of immersion with a coating compound 13 supplied through pipeline 9, cavity 6 and channels 8 under pressure, which ensures stability of the borehole walls, their fastening and connection them after immersion with the surface of the pile.

 As a result of periodic changes in the volume of the cavity 6 that occur when the drill is immersed under the influence of pulsed loads, the injection pressure of the working agent during the immersion also changes impulse, without dropping below, thanks to the discharge pressure valve 10 in the pressure pipe 9, which provides better conditions the penetration of lubricant into the soil with the task of hardening, as well as increased adhesion of the soil to the pile due to the formation of roughness (waviness) of the well walls. After immersion of the pile-shell in the soil 7 (Fig. 1), the drill 11 is removed, if necessary, together with the soil plug 14.

 The proposed device allows for self-immersion of the pile-shell in almost any soil, while to exclude the possible likelihood of freezing of the immersed pile, the drill 1 can be equipped with a pusher 15 with a shock-absorbing pad 16 that interacts with the upper end of the pile-shell and is separated from it by a distance not exceeding drill immersion values from a single application of a forceful immersion effect to it.

 The device can also be used for immersion piles-shells with washing (Fig. 3). In this case, stamp 3 is performed (but not necessarily) with transverse dimensions smaller than that of the pile pile, and the immersion of drill 1 and pile 5 is carried out under the influence of immersion loads transmitted simultaneously to the upper ends.

Claims (3)

 1. DEVICE FOR DIPPING OF PILES-SHELLS, comprising a tubular drill with a lower end covering it and having an annular stamp having a stop installed to interact with an immersion pile sheath and by means of a stop with a drill, characterized in that, in order to expand technological capabilities due to providing the possibility of using prefabricated piles-shells for immersion and facilitating their immersion, the drill is equipped with a sealing ring located on its outer side, installed with the possibility of interconnection with about the pile-sheath with the formation with the latter and with the stamp of an annular closed cavity communicated with the space between the lower end of the pile-sheath and the stamp and with the soil surrounding the pile, as well as through a pressure pipe with a non-return valve - with a medium source.  2. The device according to claim 1, characterized in that the stamp is made with an outer radius greater than the outer radius of the pile-shell.  3. The device according to claim 2, characterized in that the drill is equipped with a cushioning gasket interacting with the upper end of the pile-shell, a pusher attached to it and spaced from its upper end at a distance not exceeding the value of the drill immersion for one cycle of its immersion .

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