Patent Number: 047449411
Section: claims

1. An antiseismic support structure for a pile block in a building well having a top and a bottom, said pile block containing a reactor vessel of a nuclear reactor and having a top and a bottom, said support structure comprising: a first floor supporting said building well; a second floor below said first floor; elastic support means separating said first and second floor for permitting a horizontal oscillatory displacement of one floor relative to the other to filter horizontal components of an earthquake with respect to the pile block; a series of elastic, absorbing supports between the bottom of said pile block and said first floor, for filtering vertical components of seismic waves; and a plurality of vertical guiding means between said building well and said pile block and arranged between the top and bottom of the building well, said vertical guiding means being horizontally rigid for preventing horizontal displacement and rocking of said pile block relative to said building well under the action of horizontal components of seismic waves, said vertical guiding means being vertically flexible for permitting and guiding a relative vertical movement between the pile block and the building well during a seismic occurrence. 2. A support structure according to claim 1, wherein the elastic absorbing supports comprise viscous absorbing means. 3. An antiseismic support structure for a pile block in a building well having a top and a bottom, said pile block containing a reactor vessel of a nuclear reactor and having a top and a bottom, said support structure comprising: a first floor supporting said building; a second floor below said first floor; elastic support means separating said first and second floor for permitting a horizontal oscillatory displacemnt of one floor relative to the other to filter horizontal components of an earthquake with respect to the pile block; a series of elastic, absorbing supports between the top of said pile block and the top of said building well, for filtering vertical components of seismic waves; and a plurality of vertical guiding means between said building well and said pile block and arranged between the top and bottom of the building well, said vertical guiding means being horizontally rigid for preventing horizontal displacement and rocking of said pile block relative to said building well under the action of horizontal components of seismic waves, said vertical guiding means being vertically flexible for permitting and guiding a relative vertical movement between the pile block and the building well during a seismic occurrence. 4. A support structure according to claim 3, wherein the elastic absorbing supports comprise viscous absorbing means.