Calculation of reinforcement tension coefficient of waterfront reinforced wall under seismic actions
HUANG Rui1，2
(1. College of Civil Engineering，Shaoxing University，Shaoxing，Zhejiang 312000，China； 2. Center of Rock Mechanics and Geohazards，Shaoxing University，Shaoxing，Zhejiang 312000，China)
In order to improve the seismic stability calculation method of retaining structure，a formula of the reinforcement tension coefficient under seismic actions is established，which is based on pseudo-static method and horizontal slice analysis. The derivation aims at the waterfront reinforced-soil wall under partial submerged conditions. And two types of failure surfaces in the forms of linear and polyline in the backfill are considered. Besides，according to the difference of permeability，soil and water pressure together or separately are calculated by this method respectively. The effects of horizontal seismic inertia force，vertical seismic inertia force，seismic excess pore pressure and hydrodynamic pressure are taken into accounted. Compared with the dry backfill condition，reinforcement tension required in the submerged condition will be greater significantly，which should be paid reasonable considerations in engineering design. The parametric studies demonstrate that the reinforcement tension coefficient of linear failure surface is higher than that of polyline failure surface. The coefficient calculated by soil and water separately is larger than that obtained by soil and water together. Seismic excess pore pressure and water level have a significantly increasing effect on tension coefficient. And the increasing amplitude is related to the forms of failure surfaces and the calculation mode of soil and water pressure. Both soil friction angle and wall friction angle have a decreasing influence on tension coefficient，but the influence of soil friction angle is more obvious.
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2018, Vol. 37 
