METHOD FOR PILE FOUNDATION AND BRIDGE SUPPORT ERECTION Russian patent published in 2007 - IPC E01D19/02 E02D27/12 

FIELD: bridge construction, particularly to erect pile foundations of bridge supports adapted to take vertical, horizontal and moment loads.

SUBSTANCE: method involves drilling at least one vertical and inclined wells, wherein the inclined wells have 1:(10-12) axes inclination with respect to vertical axis and are formed by directed drilling for the full depth of casing pipe submersible in ground; placing reinforcement case in the casing pipe arranged in well; supplying concrete mix along with casing pipe removal from well. First of all vertical pile extending along grillage outline center or pile offset from grillage outline center to one grillage side in plane view is erected. Then extreme inclined piles are formed, wherein each inclined pile is offset from it towards opposite grillage side along diagonal line, wherein the grillage is built within sheet-pile enclosure. After grillage erection spaces between sheet-pile enclosure and grillage body are filled with ground and sheet-pile enclosure is disassembled after span structure assemblage installation on above bridge supports.

EFFECT: increased load-bearing capacity and reliability due to possibility to use concrete and metal saving technology along with load-bearing capacity retention; possibility to finish foundation erection after support structure or span structure installation on the foundation.

5 cl, 4 dwg