RU204251U1 - REINFORCED SHELL STRUCTURE - Google Patents

Abstract

The utility model relates to construction, in particular to pile foundations. The technical result consists in increasing the bearing capacity of the shell pile while reducing the concrete consumption and in expanding the arsenal of shell piles. To obtain a technical result, a reinforced pile-shell structure is proposed, containing a pile shell (1), in which a reinforced concrete trunk is formed. What is new is that the reinforced concrete shaft (3) is made with a broadened upper part (4) and with a T-shaped longitudinal section. In this case, the broadened upper part (4) is formed in the pile shell (1), in which a compacted soil ring (2) is also formed, covering the reinforced concrete shaft (3) under its broadened part and formed when the pile shell (1) is pressed into the ground and into the process of concreting a previously developed well (9) for the formation of a reinforced concrete shaft (3) in a soil-compacted ring (2) using a protective pipe (7) extracted from the well (9) when the compacted concrete mixture is fed through the pipe (7). In this case, in particular, the smaller diameter of the reinforced concrete shaft (3) is 2 times less than the diameter of the pile shell (1). In addition, the protective pipe (7) used to seal the soil ring (2) and concreting the reinforced concrete shaft is equipped with movable spring-loaded elements (8) on the outside, forming a shell, the maximum size of which is larger than the diameter of the well (9), and ensuring the sealing of the well walls in contact with them. 2 c.p. f-ly, 3 dwg

Description

The utility model relates to construction, in particular to pile foundations.

Known construction of a pile-shell, erected according to a known method, containing a soil shaft formed in a composite shell of the pile (RF Patent No. 1793752 C, priority date 12/05/1987, publication date 04/10/1995, author Orlov YM, RU).

The disadvantage of the analogue is the low bearing capacity due to the presence of the soil shaft of the shell pile.

Known construction of a pile-shell, containing a pile shell, in which a reinforced concrete trunk is formed (https://kommtex.ru/svai-obolochki#:~:text=Pile-shell%20%20 these are%20hollow%20piles, reinforced concrete%2С%20which % 20may have% 20% 20tip, view date 10/01/2020, prototype).

The disadvantage of the prototype is the high consumption of concrete for the formation of a reinforced concrete shaft in a pile shell and the underutilization of the bearing capacity of the soil.

A technical problem is the need to expand the arsenal of technical means that increase the bearing capacity of the shell pile while reducing the consumption of concrete.

To solve a technical problem and achieve a technical result, a reinforced pile-shell structure is proposed, containing a pile shell, in which a reinforced concrete trunk is formed. The novelty is that the reinforced concrete shaft is made with a broadened upper part and with a T-shaped longitudinal section, and the broadened upper part is formed in a pile shell, in which a compacted soil ring is also formed, covering the reinforced concrete shaft under its broadened part and formed when the pile is pressed in. shells into the ground and in the process of concreting a pre-developed well to form a reinforced concrete shaft in a compacted soil ring using a protective pipe extracted from the well when the compacted concrete mixture is fed through the pipe.

According to the utility model, the smaller diameter of the reinforced concrete shaft is 2 times less than the diameter of the pile shell.

According to the utility model, the protective pipe used for sealing the soil ring and concreting the reinforced concrete shaft is provided with movable spring-loaded elements on the outside, forming a shell, the maximum size of which is larger than the diameter of the borehole, and providing sealing of the borehole walls in contact with them.

FIG. 1 schematically shows the structure of a reinforced shell pile, where:

1 - pile shell;

2 - compacted soil ring;

3 - reinforced concrete barrel;

4 - widened upper part of the reinforced concrete shaft;

5 - reinforcing cage;

6 - backfilling.

FIG. 2 schematically shows a protective tube, top view, where:

7 - inner pipe;

8 - movable spring-loaded elements.

FIG. 3 schematically shows the stages of construction of a reinforced shell pile, where:

9 - well;

10 - foundation pit.

The construction of the reinforced shell pile shown in FIG. 1 is carried out as follows. The pit 10 is preliminarily developed to the design height of the broadened part 4 of the reinforced concrete shaft 3, with a width exceeding the diameter of the pile shell 1, and along the geometric axis of the pile-shell, a well 9 is made with a diameter 2 times smaller than the diameter of the pile shell 1, as shown in Fig. 3a. A protective pipe 7 with spring-loaded elements attached to it is immersed in the well 9 using a hydraulic hammer or in another known method. In this case, the walls of the well 9 are sealed by moving the movable spring-loaded elements 8 of the protective pipe, forming a shell, the maximum size of which is greater than the diameter of the well 9, as shown in FIG. 3b. Coaxially to the borehole 9, the pile shell 1 is pressed in with a hydraulic hammer or in another known way, and a compacted soil ring 2 is formed, as shown in Fig. 3c. The reinforcement cage 5 is lowered into the cavity of the protective pipe 7, and the cage of the broadened part 4 of the reinforced concrete barrel is also formed, as shown in FIG. 3d. Through the protective pipe 7, the borehole 9 is filled with a concrete mixture with ramming and gradual removal of the protective pipe from the borehole, as shown in FIG. 3d. The concrete mixture is laid to the top of the pile shell, while a reinforced concrete shaft 3 with a broadened part 4 is formed, after which backfilling of the sinuses 6 of the pit 10 is performed, as shown in Fig. 3f.

Thus, the technical result achieved with the implementation of the utility model consists in expanding the arsenal of technical means used in the construction of shell piles, providing an increase in the bearing capacity of the shell pile while reducing concrete consumption.

Claims (2)

1. The structure of a reinforced pile-shell, containing a pile shell, in which a reinforced concrete trunk is formed, characterized in that the reinforced concrete barrel is made with a broadened upper part with a T-shaped longitudinal section, and the broadened upper part is formed in a pile shell, in which a compacted soil ring, covering a reinforced concrete shaft under its widened part, formed when the pile shell is pressed into the ground. 2. The structure of the reinforced pile-shell according to claim 1, characterized in that the smaller diameter of the reinforced concrete shaft is 2 times less than the diameter of the pile shell.

Images