Hand-dug　piles　are　insufficient　to　meet　the　load-bearing　requirements　for　transmission　tower　foundations　in　the　extreme　environments　of　the　mountainous　regions　of　Western　China.　Excessive　deformation　can　not　only　compromise　the　stability　of　the　support　system　but　also　inflict　damage　on　adjacent　structures.　The　application　of　vertical-inclined　combined　high-strength　high-pressure　jet　grouting　pile　(VICP)　in　such　scenarios　can　effectively　enhance　bearing　performance;　however,　their　mechanical　behavior　remains　insufficiently　investigated.　In　this　study,　model　experiments　are　conducted　to　examine　the　variations　in　bending　moment,　axial　force,　lateral　friction　resistance,　and　shear　force　in　VICP　with　different　inclination　angles　(α　=　90°,　80°,　70°,　and　60°)　under　horizontal　loading.　The　results　revealed　that:　(1)　The　displacement　at　the　pile　top,　along　with　the　bending　moment,　shear　force,　and　axial　force,　increases　progressively　as　the　inclination　angle　(α)　increases.　Horizontal　bearing　capacity　decreases　with　increasing　α　and　L/D　ratio.　The　horizontal　bearing　capacity　of　the　VICP　(α　=　60°)　is　1.83　times　that　of　the　vertical　pile　configuration.　(2)　The　damage　mode　of　pile　foundation　involves　tensile　damage　to　the　left　pile　and　the　central　pile,　with　compressive　damage　occurring　in　the　right　pile.　(3)　The　‘arching　effect’　is　observed　in　VICP　(α　=　80°,　70°,　and　60°)　compared　to　vertical　piles.　As　the　inclination　angle　(α)　decreases,　the　arching　effect　becomes　more　pronounced.　©　2025　Taylor　&　Francis　Group,　LLC.