This　study　aimed　to　investigate　the　effects　of　installing　pipe　roofings　and　rock　bolts　before　bench　cuts　during　the　excavation　of　a　tunnel.　The　limited　space　available　during　excavation　resulted　in　the　formation　of　triple　adjacent　tunnels.　To　solve　the　issue　of　narrow　spacing　between　the　tunnels,　middle　posts　were　added　for　greater　stiffness,　and　pipe　roofings　were　installed　to　prevent　collapse　in　tunnel　sections　with　shallow　overburden　where　the　rock　weathering　was　significant.　PLAXIS　3D　2018,　a　finite　element　analysis　program,　was　used　to　simulate　the　wall　rock　displacement　during　the　bench　cuts　with　pipe　roofings　and　rock　bolts　installed.　In　addition,　the　difference　between　the　presence　and　absence　of　bias　pressure　was　studied.　It　was　found　that,　in　the　absence　of　bias　pressure,　the　tensile　and　compressive　forces　were　symmetric　from　side　to　side.　However,　under　bias　pressure,　the　tensile　force　remained　unchanged.　Moreover,　the　compressive　force　under　bias　pressure　was　three　times　greater　than　without　bias　pressure　and　was　concentrated　at　the　sidewall　of　the　eastbound　tunnel　and　the　crown　of　the　mass　rapid　transit　(MRT)　tunnel.　The　results　may　be　helpful　for　the　design　and　construction　of　multiple　adjacent　tunnels　in　the　future.