水利与建筑工程学报
水利與建築工程學報
수리여건축공정학보
TECHNIQUE OF SEEPAGE CONTROL
2013年
6期
129-133
,共5页
锚杆%粘弹性%流变%衬砌应力及位移%ABAQUS%数值模拟
錨桿%粘彈性%流變%襯砌應力及位移%ABAQUS%數值模擬
묘간%점탄성%류변%츤체응력급위이%ABAQUS%수치모의
bolt%viscoelasticity%rheology%stress and displacement of lining%ABAQUS%numerical simulation
为了研究流变后锚杆对衬砌的应力、位移的控制，采用 Burgers 模型的松弛剪切模量 Prony 级数形式，确定其在 ABAQUS 中粘弹性本构输入参数，使用 ABAQUS 对某五心圆隧道进行了不同锚杆支护下围岩流变后衬砌应力及位移的数值模拟及系统分析。结果表明锚杆支护对衬砌应力增长有明显的控制，可使衬砌应力比无锚杆支护时减小24．31％，但是对位移增长控制并不明显，仅减小1．30％。在 V 级围岩中，锚杆长度在4 m 以内时，增大锚杆长度可以有效地改善锚固效果，为考虑岩石流变情况下的围岩锚固研究提供了参考。
為瞭研究流變後錨桿對襯砌的應力、位移的控製，採用 Burgers 模型的鬆弛剪切模量 Prony 級數形式，確定其在 ABAQUS 中粘彈性本構輸入參數，使用 ABAQUS 對某五心圓隧道進行瞭不同錨桿支護下圍巖流變後襯砌應力及位移的數值模擬及繫統分析。結果錶明錨桿支護對襯砌應力增長有明顯的控製，可使襯砌應力比無錨桿支護時減小24．31％，但是對位移增長控製併不明顯，僅減小1．30％。在 V 級圍巖中，錨桿長度在4 m 以內時，增大錨桿長度可以有效地改善錨固效果，為攷慮巖石流變情況下的圍巖錨固研究提供瞭參攷。
위료연구류변후묘간대츤체적응력、위이적공제，채용 Burgers 모형적송이전절모량 Prony 급수형식，학정기재 ABAQUS 중점탄성본구수입삼수，사용 ABAQUS 대모오심원수도진행료불동묘간지호하위암류변후츤체응력급위이적수치모의급계통분석。결과표명묘간지호대츤체응력증장유명현적공제，가사츤체응력비무묘간지호시감소24．31％，단시대위이증장공제병불명현，부감소1．30％。재 V 급위암중，묘간장도재4 m 이내시，증대묘간장도가이유효지개선묘고효과，위고필암석류변정황하적위암묘고연구제공료삼고。
In order to investigate the controlling effect of bolt on the stress and displacement of the lining after long -term rock rheology ,the shear modulus of relaxation in Prony series form of Burgers model is used to determine the input pa-rameters of ABAQUS viscoelastic model ,and ABAQUS is adopted to make the numerical simulation and systematical analysis of the stress and displacement of the lining of different bolt support after rock rheology .The research results show that the bolts can obviously control the stress increase of the lining .This stress is reduced by 24 .31% on average com-pared to that without bolt supports .However ,it is not obvious for displacement control that the stress is reduced by only 1 .30% on average .The reinforcement effect may be improved and enhanced by increasing the bolt length within 4 meters in surrounding rock grade V ,which could provide some references for the research of the surrounding rock anchorage un -der considering the rock rheology .
