Calculation method for anti-overturning stability of double-row piles supporting structure

The invention relates to a calculation method for anti-overturning stability of a double-row piles supporting structure. As for the double-row piles foundation pit supporting structure (including a front row pile 1, a back row pile 2, a pile top connecting beam 3, and earth among piles 4), a calculation method for anti-overturning stability of the double-row piles supporting structure taking compression resistance, anti-pulling force couple and groundwater buoyancy into consideration. A corresponding analytic expression is deducted. The method helps overcome defects such as too long piles and engineering waste caused by a conventional industry standard technical regulations of building foundation pit shoring JGJ 12-2012 and a anti-overturning calculation method in DB42/T159-2012 technical regulations of foundation pit engineering in Hubei Province. The engineering projects shows that with the safety coefficient of the anti-overturning stability of the double-row piles supporting structure calculated by the method is increased by 20%-55% compared with the existing standard; and the calculation method is high in reliability, reasonable in result, easy and feasible and low in calculation cost and economic and reasonable in design scheme.