METHOD FOR CONSTRUCTING BRIDGE SUPPORT IN WATER AREA Russian patent published in 2023 - IPC E01D19/02 

FIELD: construction.

SUBSTANCE: process aspects for the construction of bridge supports across water barriers. A method for constructing a bridge support in a water area includes constructing drilling bridges and a process platform on which the first section of an annular waterproof shell is assembled from flat elements with waterproofing made of elastic material laid between them, equipping the first section with a first casing, and transferring the assembled section by crane into the opening between the drilling rigs bridges with its location along the vertical axis of the annular waterproof shell and lowering it by means of jacks to the height of the section of the annular waterproof shell to a position in which the second section of the annular waterproof shell assembled on the mounting platform is mounted on it using flange connections and with a waterproofing gasket made of elastic material, followed by installation via flange connections of the sections located above. Next, the shell is built up section by section until the first casing is immersed in the prepared base, a grouting layer of concrete mixture is laid using the method of vertical movement of pipes, water is pumped out from the internal volume of the annular waterproof shell after the concrete has gained strength in the grouting layer. Then the metal protective shells of the drilled piles are cut off, the heads of the drilled piles are broken, the reinforcement outlets are cleaned, the grillage is reinforced, the grillage formwork is installed, the reinforcement outlets of the monolithic part of the support body are installed, the grillage is concreted, the reinforcement outlets are reinforced, the reinforcement outlets are installed, the monolithic part of the support body is concreted, the formwork of the grillage and the monolithic part of the support body are dismantled. After this, the shell is lifted in stages for the subsequent dismantling of each section into elements. In this case, support structures with an opening for the support being constructed are first constructed, and then drilling bridges are constructed, from which the metal protective shells of drilling piles are immersed evenly and mutually parallel to the location of their vertical axes along the circumference with a diameter smaller than the internal diameter of the annular waterproof shell, with their penetration into foundation soil. The sections are transferred by a crane using a cross-beam in plan, and before the first section is lowered, external stops in the form of racks with struts are installed on the drilling bridges, which come into contact with the guides on its outer surface when installing the section and during its lowering. A pair of main external stops, opposite and symmetrically located relative to the vertical axis of the annular waterproof shell, are positioned so that the vertical planes passing through their axes are perpendicular to the longitudinal axes of the drilling bridges. Pairs of additional external stops are placed symmetrically on both sides of the main ones at equal acute angles to them in pairs and so that the vertical axis of the annular waterproof shell would be located in vertical planes passing through the vertical axes of additional external stops. On the inner side of the sections of the annular waterproof shell, internal centering stops are installed, which come into contact with the outer surface of the metal protective shells of the drill piles when lowering the sections of the annular waterproof shell. In addition, internal centering stops are installed, the surface of which facing the pile shells has less curvature than the curvature of the surface of the pile shell. And the transfer of the assembled section with the annular waterproof shell located along the vertical axis is carried out by a jib crane by turning the boom.

EFFECT: intensification of the process of constructing bridge supports in the water area and ensuring the required geometric accuracy under conditions of the dynamic impact of imported masses.

3 cl, 6 dwg