Ground motion parameter study is a basis for seismic design of underground houses

yet regular sub-ground motions parameter study may ignore the unique alpine gorge topography effect.In this paper

the sub-ground motions parameters for Baihetan underground house is studied from the point of view of amplitude

duration

and spectrum.Differences between various ground motion parameters are discussed.The fault zones possess suppressing effect on amplitude parameters

low-pass filtering effect on spectrum parameters

and enlarging effect on duration parameters

for which further study is required.Influence of alpine gorge topography is significant on amplitude and spectrum

yet negligible on duration.It is suggested that without specialized study

results from regular sub-ground motions parameter study may not be suitable for underground houses in alpine gorge area.