Geotechnics

Ge­o­sig­ma car­ri­es out ge­o­te­ch­ni­cal in­ve­s­ti­ga­tions, ana­ly­ses and plans. We pro­du­ce sta­bi­li­ty and sub­si­den­ce as­sess­ments, re­com­men­da­tions for foun­da­tion lay­ing and de­signs for tem­po­ra­ry shafts and re­in­for­ce­ments in the soil.

The main pur­po­se of ge­o­te­ch­ni­cal in­ve­s­ti­ga­tions is to high­light the rock, soil and ground­wa­ter con­di­tions on a si­te or in an area. We car­ry out in­ve­s­ti­ga­tions, pro­du­ce ana­ly­ses and pro­vi­de pro­po­sals on the ac­tion to be ta­ken.

One im­por­tant area for ge­o­te­ch­ni­cal ana­ly­ses is the Gö­ta älv (ri­ver). A num­ber of lar­ge lands­li­des ha­ve oc­cur­red ne­ar the ri­ver sin­ce the 12th cen­tu­ry, which is when the most dra­ma­tic lands­li­de took pla­ce. It is highly li­kely that the­re will be another lands­li­de. As a re­sult, Ge­o­sig­ma’s work plays an im­por­tant ro­le in the im­pro­ve­ment of rou­te 45 which is un­der way in this area that is pro­ne to lands­li­des. Ge­o­sig­ma has ex­ten­si­ve ex­pe­ri­en­ce of sta­bi­li­ty ana­ly­ses and ge­o­te­ch­ni­cal is­sues in in­f­ra­structu­re pro­jects. We ha­ve de­sig­ned me­a­su­res to im­pro­ve sta­bi­li­ty in dif­fe­rent are­as, in­clu­ding the re­buil­ding work af­ter the lands­li­de in Munke­dal.

We al­so pro­du­ce re­com­men­da­tions on lay­ing foun­da­tions, ta­king in­to ac­count both te­ch­no­lo­gy and cost, for dif­fe­rent ty­pes of buil­dings and fa­ci­li­ti­es. We al­so de­sign tem­po­ra­ry me­a­su­res and re­in­for­ce­ments in the soil, as well as iden­ti­fy­ing the cau­ses of da­mage. One ex­amp­le of this is an ad­van­ced sub­si­den­ce ana­ly­sis (of an area with a com­plex st­ress histo­ry) in Ham­m­ar­by Sjös­t­ad.

Our custo­mers’ requi­re­ments and spe­ci­fi­ca­tions and of­fi­ci­al re­gu­la­tions form the star­ting po­int for all our in­ve­s­ti­ga­tions. The sco­pe of the in­ve­s­ti­ga­tion de­pends on the stage at which the ge­o­te­ch­ni­cal, ge­ohydro­lo­gi­cal and rock en­gi­ne­e­ring re­port will be used.

Ge­o­sig­ma’s ser­vi­ces in­clu­de fi­eld stu­dy pro­g­ram­mes and si­te vi­sits, com­pi­ling and ana­ly­sing new and ex­is­ting in­ve­s­ti­ga­tions and car­ry­ing out sur­veys, if ne­ces­sa­ry. This forms the ba­sis for sup­p­le­men­ta­ry me­a­su­res which may be nee­ded im­me­di­a­tely or at a la­ter stage. We re­port on the in­ve­s­ti­ga­tions that we car­ry out and pro­vi­de a de­scrip­tion of the ge­o­te­ch­ni­cal, ge­ohydro­lo­gi­cal and rock con­di­tions. De­pen­ding on the stage of the pro­ject, we may al­so pro­po­se sup­p­le­men­ta­ry ana­ly­ses nee­ded be­fo­re con­struc­tion work starts. The pre­pa­ra­tion of de­tai­led plans is one ex­amp­le of an area whe­re we use our ge­o­te­ch­ni­cal and rock en­gi­ne­e­ring skills.

We car­ry out sta­bi­li­ty and sub­si­den­ce ana­ly­ses de­sig­ned for each spe­ci­fic structu­re and pro­du­ce re­com­men­da­tions on foun­da­tion lay­ing and re­in­for­ce­ment me­a­su­res. We al­so draw up mo­ni­to­ring pro­g­ram­mes for the con­struc­tion pha­se. We spe­ci­a­li­se in sta­bi­li­ty re­ports on are­as pro­ne to lands­li­des. One ex­amp­le of this is our sta­bi­li­ty sur­vey around the Gö­ta älv (ri­ver). We al­so car­ry out ad­van­ced sub­si­den­ce in­ve­s­ti­ga­tions, in­clu­ding a re­port on sub­si­den­ce and the prog­no­sis for the ex­is­ting Jord­fall brid­ge and Ham­m­ar­by Sjös­t­ad.

We ta­ke re­s­pon­si­bi­li­ty for pro­jects on behalf of lar­ge and small pro­per­ty de­ve­lop­ment com­pa­ni­es, local autho­ri­ti­es and go­vern­ment bo­di­es.