Mounting method-resistant pile foundation

 

(57) Abstract:

The essence of the invention: mounting-resistant base speed of the shell is set up on the platform simultaneously with the immersion of the respective piles. The shell is fixed on the upper end of the pile and lowered until it touches the shell aperture. Then the shell is cut off from the pile and bury the pile into the ground to the calculated depth. Then cut off the protruding part of the pile, fix it to the supporting leg, disconnect the shell and pull it. 2 Il.

The invention relates to the field of hydraulic engineering construction and can be used for the installation of pile foundations. The known method of installation of pile foundations for stationary platforms, including the descent of the pile inside the support leg and mount it using the clamping device [1].

Clamping device mounted on the support leg. After launching and driving piles through pipelines in the elastic chamber is injected epoxy resin. Elastic Luggage expands and presses the metal prongs to the pile.

The disadvantage of this method is the complexity of the clamping device, the unreliability of mounting piles to support the foot, especially during a storm, when platfo Foundation, including installation on the seabed fixed platform with a hollow support legs, with the location of the upper ends of their under water and dive through the latter to the bottom of the piles and their subsequent attachment to the supporting feet [2].

The disadvantage of this method is that it does not allow for rigid attachment to the welding of driven piles to support the feet. Cementation of space between the dead pile and a support leg complex and costly labor. Cutting piles after driving on the level of the upper end of the support leg requires the use of special mechanical devices deployed inside piles. Under the action of wave loads unripe fruit cement the connection can be destroyed.

Also known mounting method-resistant pile foundations, including installation on the seabed fixed platform with a hollow support legs, with the location of the upper ends of their under water, having a circular aperture for mounting the cylindrical shell [3].

The disadvantage of this method is the complexity of installation of the cylindrical shell at the aperture when the depth of the water.

The aim of the invention is the provision of opportunities for execution of work performed stepwise, attached to the upper end of the pile, put the pile in supporting a hollow leg, after contact with the diaphragm disconnect cylindrical shell from piles and cutting the protruding part of the piles perform after driving the cutting tool from the inside to the estimated distance from the surface of the diaphragm.

In Fig.1 shows a pile Foundation, General view; Fig.2 - section a-a in Fig.1

The method is as follows. Fixed platform 1 (Fig.1) base 2 privacyrelated and by balancing sinks to the bottom 3. Fixed platform has a hollow support leg 4 (Fig.2) and mounted around the annular diaphragm 5. In advance of the edges of the upper end 6 of the piles 7 on the ropes and grabs 8 hung inventory stepped cylindrical shell 9 with the lower annular edge of the sealing gasket. On the upper end of the pile is fixed cable 10 crane (not shown), 11 - line of cut piles. After installation on the bottom 3 of the platform 1 with a crane rope 10 is lowered into the hollow support legs 4 pile 7 to its contact with the bottom 3, with a stepped cylindrical shell sits on the diaphragm 5. Cables and clamps 8 are detached from the upper end 6 of the pile 7. After the m (not shown) and cut off the pile on the current level of 11. Strupat upper cut pile part 7 to the loading crane and remove it from the stepped cylindrical shell 9. After that, the diver or the diver descends into the shell, secures the lower part of the shell to the diaphragm 5, and then pump out the water from the inside of the shell to complete drainage. Then weld the end of the leg 4 to the remaining part of the pile. Fill the shell with water, disconnect it from the diaphragm, remove the surface and hung on to the next pile, repeat the cycle.

Technical and economic advantage of the proposed method is a reliable weld joint supporting a hollow leg platform to the piles. This method allows cutting off the welding seam, use the platform to another point.

MOUNTING METHOD-RESISTANT PILE FOUNDATIONS, including a dive to the bottom of the waters of the platform with a hollow supporting legs and an annular orifice, the setting on the aperture of the cylindrical shell, the pile through the hollow legs with their subsequent attachment to the supporting legs, wherein the using step shell, and the installation of each casing on the platform are at the same time with the immersion of the respective piles by mounting the shell on top is from piles and exercise capacity piles and burying it in the ground until the computed depth then cut from the inside of the shell protruding portion piles on the calculated distance from the surface of the diaphragm, and after fixing the piles to support the leg is cut off from the diaphragm casing and remove the latter.

 

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