This　paper　investigates　the　mechanical　characteristics　of　the　jointless　bridge,　which　is　a　new　type　of　integral　abutment　bridge　with　an　arch　structure　behind　the　abutment.　Load　tests　were　conducted　on　the　three　half-bridge　plexiglass　models　with　the　pile　constraints　placed　at　200　mm,　300　mm　and　400　mm　away　from　the　bottom　of　abutment.　The　results　showed　that　there　is　a　reasonable　distribution　of　force　between　the　bridge　girder　and　an　arch　structure.　This　study　may　promote　the　new　application　of　jointless　bridges　which　requires　no　joint　between　the　bridge　slab　and　the　road.