隧道建设
隧道建設
수도건설
TUNNEL CONSTRUCTION
2011年
4期
426-430
,共5页
高延法%李学彬%王军%曲广龙%马鹏鹏%陆侃
高延法%李學彬%王軍%麯廣龍%馬鵬鵬%陸侃
고연법%리학빈%왕군%곡엄룡%마붕붕%륙간
钢管混凝土支架%数值模拟%注浆短管%加强板%封孔塞%补强措施%应力集中
鋼管混凝土支架%數值模擬%註漿短管%加彊闆%封孔塞%補彊措施%應力集中
강관혼응토지가%수치모의%주장단관%가강판%봉공새%보강조시%응력집중
concrete-filled steel tuber support(CFSTS)%numerical simulation%short grouting tube%reinforcement plate%sealing plug%reinforcement%stress concentration
钢管混凝土支架在井下注入混凝土时要留设注浆孔,为了弥补注浆孔周边钢管刚度,实施了加强板、插入注浆短管和封孔塞3项补强措施。采用ABAQUS有限元软件分析在弹性加载条件下钢管的应力分布特征,注浆孔导致孔口两侧的压应力集中系数最大,为8.45;采用3项补强措施后,钢管注浆孔附近的压应力集中程度明显降低。通过数值分析并优化出补强措施:加强板为500mm×300 mm×10 mm,注浆短管为直径133 mm×8 mm,封孔塞直径为116 mm×40 mm。优化的补强措施有效降低了应力集中程度和补强措施的用钢量。
鋼管混凝土支架在井下註入混凝土時要留設註漿孔,為瞭瀰補註漿孔週邊鋼管剛度,實施瞭加彊闆、插入註漿短管和封孔塞3項補彊措施。採用ABAQUS有限元軟件分析在彈性加載條件下鋼管的應力分佈特徵,註漿孔導緻孔口兩側的壓應力集中繫數最大,為8.45;採用3項補彊措施後,鋼管註漿孔附近的壓應力集中程度明顯降低。通過數值分析併優化齣補彊措施:加彊闆為500mm×300 mm×10 mm,註漿短管為直徑133 mm×8 mm,封孔塞直徑為116 mm×40 mm。優化的補彊措施有效降低瞭應力集中程度和補彊措施的用鋼量。
강관혼응토지가재정하주입혼응토시요류설주장공,위료미보주장공주변강관강도,실시료가강판、삽입주장단관화봉공새3항보강조시。채용ABAQUS유한원연건분석재탄성가재조건하강관적응력분포특정,주장공도치공구량측적압응력집중계수최대,위8.45;채용3항보강조시후,강관주장공부근적압응력집중정도명현강저。통과수치분석병우화출보강조시:가강판위500mm×300 mm×10 mm,주장단관위직경133 mm×8 mm,봉공새직경위116 mm×40 mm。우화적보강조시유효강저료응력집중정도화보강조시적용강량。
Grouting holes need to be reserved when grouting in the well in the conturction of concret-filled steel tube supports(CFSTS).Reinforcement plate,short grouting tube and sealing plug are needed so as to ensure the rigidity of the steel tube around the grouting hole of CFSTS.The characteristics of the distribution of stresses on the steel tube under elastic loading conditions are analyzed by means of ABAQUS.The compressive stress concentration coefficient on both sides of the grouting hole is the largest,reaching 8.45.The compressive stress concentration degree around the grouting hole decreases dramatically when reinforcement measures are taken.Different reinforcement measures are simulated and the following optimized reinforcement measures are proposed: the dimension of the reinforcement plate should be 500mm×300mm×10mm,that of the short grouting duct should be 133mm×8mm and that of the sealing plug should be 116mm×40mm.With the optimized reinforcement measures,the stress concentration degree and the steel consumption are effectively reduced.