RU2810749C1 - Chamber for joining piles below water level - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: sometimes, when building bridges or hydraulic structures, it is not possible to complete all the work on constructing a pile foundation in a water area in one construction season. At the same time, already installed piles protruding from the water interfere with small vessel navigation and can be damaged by ice drift, so they are cut off several meters below the water line for the winter-spring period. When continuing construction, it is necessary to trim off the piles, which were previously cut by divers under water, as a rule, with insufficient precision. Next, slide and weld the next section, ensuring the quality of the work performed. The technological chamber is intended for carrying out the work on construction of a pile and contains a shell structure, in the lower part of which there is a seal along the contour of the contact with the pile and a bandage with braces for securing the chamber to the pile, a traverse fixed on the top of the chamber and including safety chains for temporarily securing the chamber, and mounting ribs inside the chamber to secure the chamber to the pile. The technological chamber is fixed to the pile, drained, and dismantled after the work is completed. The group of inventions also includes a method for mounting a technological chamber, which makes it possible to secure the technological chamber on a tubular pile cut below the water level in the water area, effectively and safely.

EFFECT: ability to carry out safe work on the installation of the next section of the pile and the installation of a welded joint between the sections of the pile.

2 cl, 5 dwg

Description

Formulation of the problem

It is necessary to build up tubular steel piles that were previously immersed and cut below the water level in the water area by 3-4 m, while ensuring normal conditions for the work (dry) and technical requirements for high-quality execution and acceptance of equal-strength butt welds of pipes (trimming and preparation edges, performing welding work with conventional equipment, conducting quality control of welds using a non-destructive method).

For the safety of work inside the enclosing structure (for personnel without diving equipment), it is necessary to ensure that it is secured to the pile against floating and from horizontal loads, as well as to seal it and prevent the entry of water.

Conditions of use: open water areas of class “O” and “M” (wave height up to 2 m).

There are no structures other than the piles themselves, cut below the water level in the water area, for which the camera can be secured.

The solution of the problem

During the design process the following tasks were solved:

- a design of a technological chamber has been developed that allows it to be installed on a previously immersed and cut below the water level pile, fastened, sealed, dried and carried out safe installation of the next section of the pile and the installation of a welded joint between the sections of the pile;

- a method for building piles using a chamber of the given design has been developed.

The invention is illustrated by the drawing where:

- fig. 1 Feeding the camera by crane onto the pile

- fig. 2 Supporting the camera on the supports on the pile. Secure the camera from floating by installing safety chains.

- fig. 3 Drying the chamber. Fixing the camera on a pile.

- fig. 4 Dismantling the safety chains and camera crossbar. Dry pile building

- fig. 5 Removing the camera

Device

The chamber is a shell structure, in the form of a cylinder; the design of the walls is not of fundamental importance; it can be orthotropic, ribbed or smooth (in the example implementation, orthotropic was adopted). Also, the cross-sectional shape does not matter; a round one was considered, but a square one was chosen.

It is important that in the lower part there is a seal along the contour of the contact with the pile (not patented) and a cuff (3) with braces (2) for securing the camera to the pile (4) from horizontal loads, a traverse (8) with chains (6) for temporary securing the camera to the pile, mounting ribs (14) inside the camera to secure the camera to the pile for the period of work in it.

Way

1. Stops (7) are welded onto the pile (4) to support the camera - see Fig. 1.

2. A lighthouse frame with a guide (5) and safety chains (6) is installed on the pile (4), with the top of the guide with the chains sticking out of the water - see Fig. 1.

3. The chamber (1) is fed by a crane and put on the pile until it stops (7), the bandage is opened in the mounting position (11) - see Fig. 2.

4. Safety chains (6) are attached to the pre-prepared holes in the upper part of the pile (4) to temporarily hold the chamber from floating during drainage. The other end of the chain is attached to the traverse (8), fixed on the top of the chamber above the water - see Fig. 2.

5. The camera is fixed to the pile (4) with a bandage (3) tightening the pins (13) - see Fig. 2.

6. The chamber is sealed and dried - see Fig. 3.

7. The mounting ribs (14) inside the chamber are welded to the pile - see Fig. 3.

8. Remove the safety chains. The edges of the pile are prepared for welding (10). The pile (9) is built up in sections with quality control of the welds - see Fig. 4.

9. Temporary fastening of the camera (15) is installed - see Fig. 5

10. Cut off the mounting ribs (14) - see Fig. 5.

11. The chamber is filled with water and dismantled by spreading the bandage pins (12) and lifting the chamber with a crane - see Fig. 5.

Analogs

There are similar designs of sealed chambers (RU 2645351, RU 2079600) that are placed on piles for their repair.

In this case, the piles being repaired rise above the water level, i.e. it is possible to secure the camera from floating with stops on the top of the pile or on structures located above the piles

Technical novelty

In this utility model, the following new technical solutions are applied in practice:

- technology and design of camera mounting;

- a method of building piles using this camera.

Application example

The design and method were successfully used in the construction of a bridge across the Volga River bypassing the city of Tolyatti when building up tubular steel piles cut below the water level to allow the passage of spring ice drift.

The performance of technical solutions is confirmed by the results of both tests on the stand and operation in the river area

Claims (2)

1. Technological chamber for making welded joints under normal conditions and building up tubular piles, previously cut below the water level in the water area, containing a shell structure, in the lower part of which there is a seal along the contour of the contact with the pile and a bandage with braces for securing the chamber to the pile, traverse , fixed on the top of the chamber and including safety chains for temporarily securing the camera, mounting ribs inside the chamber for securing the camera to the pile. 2. A method of fixing a technological chamber on a tubular pile cut below the water level in the water area, which consists in welding stops to install the camera on the pile, the camera with the bandage open in the installation position is put on the pile until it stops, and to temporarily hold the camera from floating use safety chains attached at one end to the top of the pile, and the other to a traverse fixed at the top of the chamber above the water, after which the chamber in its lower part is fixed to the pile with a bandage, tightening the studs, sealed, drained, and the ribs attaching the camera to the pile at the bottom, after which the safety chains are removed.

Images